CN114339617A - Method and device for configuring and using MBS (multicast broadcast multicast service) resources in NR (neighbor radio network) cell - Google Patents

Abstract

The application provides a method and a device for configuring and using MBS resources in an NR cell, wherein the method comprises the following steps: determining a frequency interval for the broadcast service transmission according to an expected bandwidth for the broadcast service transmission, the frequency interval including an initial bandwidth part BWP; dividing a frequency interval into one or more BWPs; configuring one or more secondary BWPs for the broadcast service; determining a frequency range for configuring active/inactive DL BWPs for each radio frequency RF class, wherein when the active/inactive DL BWPs configured for the user equipment UE are located in the frequency range corresponding to the RF class of the UE and include frequency regions or secondary BWPs for transmitting broadcast services, the UE can receive any one broadcast service while receiving a unicast service; and allocating resources for the multicast service. Based on the MBS resource allocation method, broadcast services and multicast services can be provided for the UE in various states.

Description

Method and device for configuring and using MBS (multicast broadcast multicast service) resources in NR (neighbor radio network) cell

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for configuring and using MBS resources in an NR cell.

Background

With the continuous development of wireless communication technology, New Radio Access (NR) systems have come into people's lives. To provide Multicast and Broadcast Service (MBS) in NR cells, Release 17Work Item (R17 WI) was set up in The 3rd Generation Partnership Project (3 GPP) Radio Access Network (RAN) in year 20112 in The full meeting of Radio Access Network (RAN): NR MBS.

In NR MBS, a method for determining the configuration and usage of MBS resources in an NR cell is required in order to provide broadcast services and multicast services to User Equipments (UEs) in various states in the NR cell.

Disclosure of Invention

The application provides a method and a device for configuring and using MBS resources in an NR cell, so that UE in various states can receive corresponding broadcast services and multicast services.

A first aspect of the present application provides a resource allocation method, including:

determining a frequency interval for broadcast service transmission including an initial bandwidth part BWP according to an expected bandwidth for broadcast service transmission;

dividing the frequency interval into one or more BWPs, and configuring a control resource set CORESET and a search space on each divided BWP, wherein the CORESET and the search space are used for sending scheduling information of broadcast services transmitted on the corresponding BWP;

determining a frequency range for configuring active/inactive DL BWPs (downlink/uplink) aiming at each radio frequency RF (radio frequency) grade, wherein when the active/inactive DL BWPs configured for User Equipment (UE) are positioned in the frequency range corresponding to the RF grade of the UE and contain the frequency interval for transmitting the broadcast service, the UE can receive any broadcast service while receiving unicast service;

in order to ensure that the UE receives the broadcast service while receiving the unicast service, configuring frequency resources for the multicast service in an area outside a frequency range corresponding to a maximum RF level, or respectively setting reserved areas on the left side and the right side of the frequency range corresponding to the maximum RF level, and configuring the frequency resources for the multicast service in the frequency range corresponding to the maximum RF level and the area outside the reserved areas;

when the bandwidth corresponding to the frequency interval for transmitting the broadcast service is greater than the maximum bandwidth supported by the UE with the smallest radio frequency class, under the condition that the frequency interval is ensured to contain the initial BWP, compressing the frequency interval until the bandwidth corresponding to the frequency interval is not greater than the maximum bandwidth supported by the UE with the smallest radio frequency class, and simultaneously configuring one or more secondary BWPs in the carrier frequency bandwidth for transmitting the broadcast service, and broadcasting configuration information of each secondary BWP on the initial BWP;

for each secondary BWP, in order to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, determining, for each RF class, a frequency range for configuring an active/inactive DL BWP, and when the active BWP configured for the UE is located within the frequency range corresponding to the RF class of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

Optionally, the determining a frequency interval for broadcast service transmission according to an expected bandwidth for broadcast service transmission includes:

bandwidth intended for broadcast traffic transmission;

determining a bandwidth actually available for broadcast service transmission on the entire initial BWP on the premise that the initial BWP is used for transmitting broadcast service;

a frequency interval for broadcast service transmission within a cell is determined.

Optionally, configuring a CORESET and a search space on each divided BWP includes:

uniformly configuring one group or a plurality of groups of CORESET and search spaces for each divided BWP in the initial BWP, wherein each group of CORESET and search space consists of one CORESET and a common search space configured on the CORESET;

alternatively, the CORESET and the search space are configured for each divided BWP separately.

A second aspect of the present application provides a method for sending a broadcast service in an NR cell, which is applied to a communication system, where the communication system includes a base station and a UE, and the method includes:

for any broadcast service transmitted in an NR cell, a base station selects one BWP from divided BWPs for broadcast service transmission to transmit the broadcast service by a point-to-multipoint PTM bearer, and generates PTM configuration information of the broadcast service, and for a UE reporting a radio resource control RRC connected state interested in the broadcast service, if the UE cannot receive the broadcast service through an active DL BWP, the base station reconfigures the active DL BWP of the UE, or establishes a PTP bearer for the UE, or configures a secondary PTM bearer for the UE, and accordingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and secondary PTM bearer configuration information of the broadcast service.

The base station sends PTM configuration information of the broadcast service in an NR cell through a single-cell multicast control channel SC-MCCH, and for RRC connected-state UE which reports interest to the broadcast service, the base station transmits related information to the UE through a special signaling;

the UE receives the SC-MCCH or the special signaling and executes corresponding processing;

the base station adopts corresponding load to send the broadcast service;

and the UE receives the broadcast service through a corresponding bearer.

Optionally, for the UE reporting the RRC connected state interested in the broadcast service, the base station transmits the relevant information to the UE through a dedicated signaling, including:

if the UE can receive the broadcast service through the activated DL BWP, the base station sends the PTM configuration information of the broadcast service to the UE through a special signaling;

or, if the DL BWP activated by the UE is reconfigured to receive the broadcast service transmitted by PTM bearer, the base station sends PTM configuration information of the broadcast service and corresponding DL BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station establishes PTP bearer on the activated DL BWP of the UE to transmit the broadcast service to the UE, the base station transmits PTP bearer configuration information to the UE through a dedicated signaling;

or, if the base station transmits the broadcast service to the UE through PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and DL BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the broadcast service, for each secondary PTM bearer, for a UE that receives the broadcast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active DL BWP of the UE, the base station transmits configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on the active BWP of the UE, the base station transmits the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

Optionally, the receiving, by the UE, the SC-MCCH or the dedicated signaling and performing corresponding processing includes:

when the UE is an RRC idle state/RRC non-activated state UE, the UE receives a corresponding system message to obtain the configuration information of the SC-MCCH, receives the corresponding SC-MCCH, obtains the PTM configuration information of the broadcast service from the SC-MCCH, and establishes a corresponding PTM bearer according to the PTM configuration information of the broadcast service for receiving the broadcast service;

when the UE is the RRC connection state UE which is interested in the broadcast service, if the special signaling only comprises the PTM configuration information of the broadcast service, the UE establishes a corresponding PTM bearer according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes PTM configuration information of the broadcast service and DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, and receives an existing service on the reconfigured active DL BWP, and establishes a corresponding PTM bearer on the reconfigured active DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information, the UE establishes, on an activated DL BWP, a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information, and receives the broadcast service through the PTP bearer.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information and DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives an existing service on the reconfigured activated DL BWP, establishes PTP bearers for receiving the broadcast service on the reconfigured activated DL BWP according to the PTP bearer configuration information, and receives the broadcast service through the PTP bearers.

Or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service, the UE establishes a corresponding secondary PTM bearer on an activated DL BWP according to the secondary PTM configuration information, for receiving the broadcast service.

Or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the UE reconfigures the DL BWP according to the DL BWP reconfiguration information, receives the existing service on the reconfigured active DL BWP, and establishes a corresponding secondary PTM bearer on the reconfigured active DL BWP according to the secondary PTM bearer configuration information, for receiving the broadcast service.

Optionally, the sending, by the base station, the broadcast service by using a corresponding bearer includes:

the base station sends the broadcast service through PTM bearing on corresponding DL BWP according to the PTM configuration information of the broadcast service

Or, for the UE receiving the broadcast service through PTP bearer, the base station sends the broadcast service through PTP bearer on a corresponding DL BWP according to configuration information of PTP bearer configured for the UE;

or, when the base station configures the secondary PTM bearer, the base station sends the broadcast service through the secondary PTM bearer on the corresponding DL BWP according to the configuration information of each secondary PTM bearer;

optionally, the receiving, by the UE, the broadcast service through a corresponding bearer includes:

for the RRC idle state/RRC inactive state UE, the UE receives the broadcast service through the PTM bearer;

for RRC connected UE, when the special signaling comprises PTM configuration information of the broadcast service, the UE receives the broadcast service through PTM bearing;

or, for the RRC connected UE, when the dedicated signaling includes PTP bearer configuration information, the UE receives the broadcast service through PTP bearers;

or, for the RRC connected UE, when the dedicated signaling includes the secondary PTM bearer configuration information, the UE receives the broadcast service through the secondary PTM bearer.

Optionally, the method further includes:

and the base station sends the configuration information carried by each auxiliary PTM of the broadcast service through SC-MCCH.

Optionally, the method further includes:

if the RRC connected UE interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer or the auxiliary PTM bearer, the UE reports the information of the interested broadcast service and the RF capability of the UE to the base station;

and if the broadcast service cannot be received through the existing configured PTM bearer or the auxiliary PTM bearer, the UE reports the information of the broadcast service which is interested and the RF capability of the UE to the base station.

A third aspect of the present application provides a method for sending a multicast service in an NR cell, which is applied to a communication system, where the communication system includes a base station and a UE, and the method includes:

for any NR cell, the base station determines BWPs for transmitting multicast service, preferentially configures each BWP in the area M of the cell, and configures CORESET and a search space on each BWP

According to a first message from a core network, a base station determines a multicast service to be transmitted, and according to a UE list in the message, the base station determines each NR cell for transmitting the multicast service, when at least one UE in one NR cell is positioned in the UE list, the cell needs to transmit the multicast service, and the first message is a request message for establishing the multicast service;

the base station selects BWP for sending the multicast service in each cell transmitting the multicast service and generates related configuration information;

the base station sends the relevant configuration information to each UE receiving the multicast service through a special signaling;

the UE receives the special signaling sent by the base station, and establishes a corresponding bearer for receiving the multicast service according to the special signaling;

the base station sends the multicast service in the NR cell through a corresponding bearer;

and the UE receives the multicast service through the corresponding bearer.

Optionally, the sending, by the base station, the relevant configuration information to each UE receiving the multicast service through dedicated signaling includes:

if the UE can receive the multicast service by activating DL BWP, the base station sends the PTM configuration information of the multicast service to the UE by a special signaling;

or, if the DL BWP of the UE is reconfigured to receive the multicast service transmitted by PTM bearer, the base station sends PTM configuration information of the multicast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the multicast service, for each secondary PTM bearer, for a UE that receives the multicast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active BWP of the UE, the base station transmits configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on an active DL BWP of the UE, the base station transmits the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

A fourth aspect of the present application provides a method of configuring an active BWP and an inactive BWP, comprising:

pre-configuring a plurality of common BWPs, wherein each common BWP corresponds to one service type or a plurality of service types;

the UE is preferentially configured with a general BWP or with a special BWP, each of which includes a frequency interval for transmitting a broadcast service or includes a secondary BWP.

A fifth aspect of the present application provides an apparatus for configuring MBS resources in an NR cell, including:

a first determining module for determining a frequency interval for broadcast service transmission including an initial bandwidth part BWP according to an expected bandwidth for broadcast service transmission;

a dividing module, configured to divide the frequency interval into one or more BWPs, and configure a control resource set, CORESET, and a search space on each divided BWP, where the CORESET and the search space are used to send scheduling information of a broadcast service transmitted on a corresponding BWP;

a second determining module, configured to determine, for each radio frequency RF class, a frequency range for configuring an active/inactive DL BWP, where when the active/inactive DL BWP configured for a user equipment UE is located in the frequency range corresponding to the RF class of the UE and includes the frequency interval for transmitting a broadcast service, the UE may receive any one broadcast service while receiving a unicast service;

a third determining module, configured to configure, for ensuring that the UE receives a broadcast service while receiving a unicast service, a frequency resource for a multicast service in a region outside a frequency range corresponding to a maximum RF level, or set reserved regions on left and right sides of the frequency range corresponding to the maximum RF level, respectively, and configure a frequency resource for the multicast service in the frequency range corresponding to the maximum RF level and the region outside the reserved regions;

a compressing module, configured to, when a bandwidth corresponding to the frequency interval for transmitting the broadcast service is greater than a maximum bandwidth supported by a UE with a minimum radio frequency class, compress the frequency interval to a bandwidth corresponding to the frequency interval that is not greater than the maximum bandwidth supported by the UE with the minimum radio frequency class under a condition that the frequency interval is guaranteed to include the initial BWP, configure one or more secondary BWPs in a carrier frequency bandwidth for transmitting the broadcast service, and broadcast configuration information of each secondary BWP on the initial BWP;

a processing module, configured to, for each secondary BWP, determine, for each RF class, a frequency range for configuring an active/inactive DL BWP, so that the UE can receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, where when the active BWP configured for the UE is located in the frequency range corresponding to the RF class of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

Optionally, the first determining module is specifically configured to predict a bandwidth for broadcast service transmission; determining a bandwidth actually available for broadcast service transmission on the entire initial BWP on the premise that the initial BWP is used for transmitting broadcast service; a frequency interval for broadcast service transmission within a cell is determined.

Optionally, the dividing module is specifically configured to uniformly configure one or more sets of CORESET and search space for each divided BWP in the initial BWP, where each set of CORESET and search space is formed by a CORESET and a common search space configured on the CORESET; alternatively, the CORESET and the search space are configured for each divided BWP separately.

A sixth aspect of the present application provides a transmission system of a broadcast service in an NR cell, the system comprising:

a base station, configured to select one BWP from divided BWPs for broadcast service transmission for any broadcast service transmitted in an NR cell, to transmit the broadcast service by a point-to-multipoint PTM bearer, and generate PTM configuration information of the broadcast service, and for a UE reporting a radio resource control RRC connected state interested in the broadcast service, if the UE cannot receive the broadcast service through an active DL BWP, the base station either reconfigures the active DL BWP of the UE, or establishes a PTP bearer for the UE, or configures a secondary PTM bearer for the UE, and accordingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and secondary PTM bearer configuration information of the broadcast service;

the base station is also used for sending PTM configuration information of the broadcast service in the NR cell through a single-cell multicast control channel SC-MCCH, and for reporting RRC connection state UE interested in the broadcast service, the base station transmits related information to the UE through a special signaling;

the UE is used for receiving the SC-MCCH or the special signaling and executing corresponding processing;

the base station is further configured to send the broadcast service by using a corresponding bearer;

the UE is further configured to receive the broadcast service through a corresponding bearer.

Optionally, the base station is specifically configured to, for the RRC connected UE that reports an interest to the broadcast service, send, by using a dedicated signaling, PTM configuration information of the broadcast service to the UE if the UE can receive the broadcast service through an activated DL BWP;

or, if the DL BWP of the UE is reconfigured to receive the broadcast service transmitted by the PTM bearer, sending the PTM configuration information of the broadcast service and the corresponding DL BWP reconfiguration information to the UE through a dedicated signaling;

or, if the base station establishes the PTP bearer on the activated DL BWP of the UE to transmit the broadcast service to the UE, transmitting PTP bearer configuration information to the UE through a dedicated signaling;

or, if the base station transmits the broadcast service to the UE through PTP bearer on the reconfigured activated DL BWP, transmitting PTP bearer configuration information and DL BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the broadcast service, for each secondary PTM bearer, for a UE that receives the broadcast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active DL BWP of the UE, transmitting configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on the active BWP of the UE, transmitting the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling by the base station.

Optionally, the UE is specifically configured to receive, when the UE is an RRC idle state/RRC inactive state UE, a corresponding system message to obtain configuration information of the SC-MCCH, receive the corresponding SC-MCCH, obtain PTM configuration information of the broadcast service from the SC-MCCH, establish a corresponding PTM bearer according to the PTM configuration information of the broadcast service, and receive the broadcast service;

when the UE is the RRC connection state UE which is interested in the broadcast service, if the special signaling only comprises the PTM configuration information of the broadcast service, establishing a corresponding PTM bearer according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTM configuration information of the broadcast service and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, where the UE receives an existing service on the reconfigured active DL BWP, and establishes a corresponding PTM bearer on the reconfigured active DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information, establishing, on an activated DL BWP, a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information, and receiving the broadcast service through the PTP bearer.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, receiving an existing service on the reconfigured active DL BWP, establishing a PTP bearer for receiving the broadcast service on the reconfigured active DL BWP according to the PTP bearer configuration information, and receiving the broadcast service through the PTP bearer.

Or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service, establishing a corresponding secondary PTM bearer on an activated DL BWP according to the secondary PTM configuration information, for receiving the broadcast service.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes secondary PTM configuration information of the broadcast service and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, receiving an existing service on the reconfigured active DL BWP, and establishing a corresponding secondary PTM bearer on the reconfigured active DL BWP according to the secondary PTM bearer configuration information for receiving the broadcast service.

Optionally, the base station is specifically configured to send the broadcast service through a PTM bearer on a corresponding DL BWP according to the PTM configuration information of the broadcast service

Or, for the UE receiving the broadcast service through PTP bearer, sending the broadcast service through PTP bearer on a corresponding DL BWP according to configuration information of PTP bearer configured for the UE;

or, when the base station configures the secondary PTM bearer, sending the broadcast service through the secondary PTM bearer on the corresponding DL BWP according to the configuration information of each secondary PTM bearer;

optionally, the UE is specifically configured to receive the broadcast service through a PTM bearer for an RRC idle state/RRC inactive state UE;

for RRC connected UE, when special signaling includes PTM configuration information of the broadcast service, receiving the broadcast service through PTM load;

or, for the RRC connected UE, when the dedicated signaling includes PTP bearer configuration information, receiving the broadcast service through PTP bearers;

or, for the RRC connected UE, when the secondary PTM bearer configuration information is included in the dedicated signaling, receiving the broadcast service through the secondary PTM bearer.

Optionally, the base station is further configured to send configuration information carried by each secondary PTM of the broadcast service through an SC-MCCH.

Optionally, the UE is further configured to report, to the base station, information of the broadcast service that is interested in and the RF capability of the UE if the RRC connected UE that is interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer and secondary PTM bearer;

and reporting the information of the broadcast service interested by the UE and the RF capability of the UE to the base station by the UE if the RRC idle state/RRC non-activated state UE interested by the broadcast service cannot receive the broadcast service through the existing configured PTM bearer or the auxiliary PTM bearer.

A seventh aspect of the present application provides a system for transmitting a multicast service in an NR cell, the system including:

a base station, configured to determine BWPs for transmitting multicast service for any NR cell, preferentially configure each BWP in the area M of the cell, and configure CORESET and search space on each BWP

The base station is further configured to determine, according to a first message from a core network, a multicast service to be transmitted, and determine, according to a UE list in the message, each NR cell that transmits the multicast service, where when at least one UE in one NR cell is located in the UE list, the cell needs to transmit the multicast service, and the first message is a request message for establishing the multicast service;

the base station is further configured to select BWP for transmitting the multicast service in each cell transmitting the multicast service, and generate related configuration information;

the base station is also used for sending the relevant configuration information to each UE receiving the multicast service through a special signaling;

the UE is used for receiving the special signaling sent by the base station and establishing a corresponding bearer for receiving the multicast service according to the special signaling;

the base station is further configured to send the multicast service through a corresponding bearer in an NR cell;

the UE is further configured to receive the multicast service through a corresponding bearer.

Optionally, the base station is specifically configured to

If the UE can receive the multicast service by activating DL BWP, the base station sends the PTM configuration information of the multicast service to the UE by a special signaling;

or, if the DL BWP of the UE is reconfigured to receive the multicast service transmitted by PTM bearer, the base station sends PTM configuration information of the multicast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the multicast service, for each secondary PTM bearer, for a UE that receives the multicast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active BWP of the UE, the base station transmits configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on an active DL BWP of the UE, the base station transmits the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

An eighth aspect of the present application provides an apparatus for configuring an active BWP and an inactive BWP, comprising:

a configuration module, configured to pre-configure a plurality of common BWPs, where each common BWP corresponds to one service type or multiple service types;

an allocation module, configured to preferentially configure a general BWP for the UE or preferentially configure a special BWP for the UE, where each special BWP includes a frequency interval for transmitting a broadcast service or includes a secondary BWP.

A ninth aspect of the present application provides an electronic apparatus comprising: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executes the computer-executable instructions stored by the memory to cause the electronic device to perform the above-described method.

A tenth aspect of the present application provides a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement the above-described method.

The embodiment of the application provides a method and a device for configuring and using MBS resources in an NR cell, wherein a frequency interval for transmitting broadcast services is determined according to the predicted bandwidth for transmitting the broadcast services, and the frequency interval contains an initial bandwidth part BWP; dividing a frequency interval into one or more BWPs, and configuring a control resource set CORESET and a search space on each divided BWP, wherein the CORESET and the search space are used for sending scheduling information of broadcast services transmitted on the corresponding BWP; determining a frequency range for configuring active/inactive DL BWPs (downlink/uplink) aiming at each radio frequency RF (radio frequency) grade, wherein when the active/inactive DL BWPs configured for User Equipment (UE) are positioned in the frequency range corresponding to the RF grade of the UE and contain a frequency interval for transmitting broadcast services, the UE can receive any one broadcast service while receiving unicast services; in order to ensure that the UE receives the broadcast service while receiving the unicast service, configuring frequency resources for the multicast service in an area outside a frequency range corresponding to the maximum RF level, or respectively setting reserved areas on the left side and the right side of the frequency range corresponding to the maximum RF level, and configuring the frequency resources for the multicast service in the frequency range corresponding to the maximum RF level and the area outside the reserved areas; when the bandwidth corresponding to the frequency interval for transmitting the broadcast service is greater than the maximum bandwidth supported by the UE with the smallest radio frequency class, under the condition that the frequency interval is ensured to contain the initial BWP, compressing the frequency interval to a frequency interval corresponding to which the bandwidth is not greater than the maximum bandwidth supported by the UE with the smallest radio frequency class, and simultaneously configuring one or more secondary BWPs in the carrier frequency bandwidth for transmitting the broadcast service, and broadcasting the configuration information of each secondary BWP on the initial BWP; for each secondary BWP, in order to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, a frequency range for activating/deactivating DL BWP configuration is determined for each RF class, and when the active BWP configured for the UE is located within the frequency range corresponding to the RF class of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast. By the method, the UE in various states can receive corresponding broadcast services and multicast services.

Drawings

Fig. 1 is a diagram of an MBS system architecture provided in an embodiment of the present application;

fig. 2 is a flowchart illustrating a method for configuring MBS resources in an NR cell according to an embodiment of the present application;

fig. 3 is a schematic configuration diagram of MBS resources in an NR cell according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating BWP partitioning in broadcast service transmission according to an embodiment of the present invention;

fig. 5a is a schematic diagram of configuring CORESET and search space according to an embodiment of the present application;

FIG. 5b is a schematic diagram of another configuration CORESET and search space provided by an embodiment of the present application;

fig. 6 is a signaling interaction diagram of a method for sending a broadcast service in an NR cell according to an embodiment of the present application;

fig. 7 is a signaling interaction diagram of a method for sending a multicast service in an NR cell according to an embodiment of the present application;

fig. 8 is a flowchart illustrating a method for configuring active BWP and inactive BWP according to an embodiment of the present application;

fig. 9 is a flowchart illustrating a further resource allocation method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a resource allocation apparatus according to an embodiment of the present application;

fig. 11 is a structural schematic diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are some but not all of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

With the continuous development of wireless communication technology, New Radio Access (NR) systems have come into people's lives. To provide Multicast and Broadcast Service (MBS) in NR cells, Release 17Work Item (R17 WI) was set up in The 3rd Generation Partnership Project (3 GPP) Radio Access Network (RAN) in year 20112 in The full meeting of Radio Access Network (RAN): NR MBS.

In NR MBS, a method for determining the configuration and usage of MBS resources in an NR cell is required in order to provide broadcast services and multicast services to User Equipments (UEs) in various states in the NR cell.

In order to solve the above problems, the present application provides a method and an apparatus for configuring and using MBS resources in an NR cell, so as to allocate resources to the MBS in the NR cell, and provide broadcast services and multicast services to UEs in various states in the NR cell based on the allocated resources.

First, an application scenario of the present application will be described below.

Fig. 1 is an architecture diagram of an MBS system according to an embodiment of the present application. As shown in fig. 1, the MBS system includes:user equipment 101, access network (gNB)102,5G core network 103, and MBS server. Wherein, the MBS server provides broadcast/multicast service. The 5G core network provides a user plane data transmission path and a control plane information transmission path for the broadcast/multicast service from the MBS server, and transmits the user plane data and the control plane information of the broadcast/multicast service to the gNB through the two paths respectively. And the gNB determines an NR cell for transmitting the broadcast/multicast service according to the control plane information of the broadcast/multicast service from the core network, transmits the broadcast/multicast service in the corresponding NR cell, and the UE receives the broadcast/multicast service in the NR cell according to the self requirement.

It should be understood that the system architecture shown in FIG. 1 is not to be construed as limiting the present application.

The technical solutions of the embodiments of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

It should be noted that, the order of the steps is not limited in the embodiment of the present application.

Fig. 2 is a flowchart illustrating a method for configuring MBS resources in an NR cell according to an embodiment of the present application, where this embodiment relates to a specific process of how a network device allocates resources to MBS in the NR cell, and as shown in fig. 2, the method includes:

the base station determines a frequency interval for broadcast service transmission according to an expected bandwidth for broadcast service transmission, where the frequency interval includes the initial BWP S201.

Specifically, as shown in fig. 3, the method for the base station to determine the frequency interval is as follows:

s11: the base station determines the bandwidth L used for broadcast service transmission, wherein the unit of the L is MHz.

Specifically, the base station may determine the bandwidth L of the broadcast service according to the type of the broadcast service provided in the NR cell and the number of each type of broadcast service. The unit of L is: and (4) MHz.

S12: on the premise that the initial BWP is used for transmitting the broadcast service, a bandwidth B that can be actually used for transmission of the broadcast service over the entire initial BWP is determined. The unit of B is: and (4) MHz.

Since the initial BWP uses a part of the downlink resources for transmitting the SS/PBCH Block, the system messages, and the paging messages, and needs to provide the downlink resources for the UE to access the cell, the bandwidth B < a that can be actually used for the broadcast traffic transmission on the entire initial BWP, even though the entire initial BWP is used for the broadcast traffic transmission. A is the bandwidth of the initial BWP, and the unit of A is: and (4) MHz.

S13: a frequency interval for broadcast service transmission within a cell is determined. The frequency bin is denoted by [ F1, F2], and F1 and F2 are the start and end positions of the frequency bin, respectively. This frequency interval encompasses the initial BWP.

Specifically, the frequency bin [ F1, F2] is determined as follows:

the frequency interval corresponding to the initial BWP is represented by [ f1, f2], f1 and f2 are respectively the starting position and the ending position of the initial BWP, and the length of the frequency interval is A (MHz).

If L is less than or equal to B, setting a frequency interval [ F1, F2] used for broadcast service transmission in the cell as [ F1, F2], namely: when L is less than or equal to B, the frequency interval for broadcast service transmission is just composed of the initial BWP, and the requirement of transmitting the broadcast service in the cell can be satisfied by using the resources on the initial BWP only.

Otherwise, the bandwidth corresponding to the frequency interval [ F1, F2] is: l + (A-B), the unit of bandwidth is: MHz, and the frequency interval includes the initial BWP, i.e.: the frequency interval satisfies the following formula:

F1≤f1，F2≥f2，F2-F1＝L+(A-B)。

and S202, dividing the frequency interval into one or more BWPs. Configuring a control resource set CORESET and a search space on each divided BWP, wherein the CORESET and the search space are used for transmitting scheduling information of broadcast services transmitted on the BWP.

The method of dividing BWP within the frequency interval is shown in fig. 4.

When the frequency span consists of the initial BWP, the span is divided into only 1 BWP, which is the initial BWP.

When at least two BWPs are divided in the frequency interval, if there is a nested relationship between the two BWPs (i.e. one BWP is contained in the other BWP), the bandwidth difference between the two BWPs is not less than TH, where TH is a threshold and has the unit: and (4) MHz. The method for determining TH is as follows:

the power consumption of the UE on the BWP with the bandwidth of X is P (X), the power consumption on the BWP with the bandwidth of (X + TH) is P (X + TH), and the value of TH satisfies: p (X + TH) is significantly greater than P (X), such as: (P (X + TH) -P (X))/P (X)) > TH, 10%, 20%, 30%.

When L-B < TH, the interval is divided into only 1 BWP, which consists of the entire frequency interval.

When L-B > ═ TH, the interval is divided into 1 or more BWPs. Referring to fig. 4, the specific method is as follows:

when F2-F2< TH and F1-F1< TH, only one BWP is divided, which is composed of the entire frequency range.

When F2-F2> is TH and F1-F1< TH, a BWP is divided first, the BWP starts at F1 and ends at F2. The BWP is indicated by thenumber 0.

When F1-F1> is TH and F2-F2< TH, a BWP is divided firstly, wherein the BWP has a starting position of F1 and an ending position of F2. The BWP is indicated by thenumber 0.

When F2-F2> is TH and F1-F1> is TH, a BWP is first divided, and the BWP is the initial BWP. The BWP is indicated by thenumber 0.

When F2-F2> -TH, F2 is the end point with F1 as the starting point, dividing the frequency range into K1 BWPs:

starting from F2, and moving towards the direction of F2, dividing the frequency resources between F2 and F2 into K1 segments, wherein the end point of the K segment is as follows: d1(K), K is 1, …, K1, d1(K1) F2. The length of each segment is not less than TH, but less than 2 TH. In fig. 4, K1 is 3.

The K-th BWP for the partition starts at f1 and ends at d1(K), K being 1, …, K1. The bandwidth difference between two adjacent BWPs is not less than TH, and such division can effectively reduce power consumption on the UE side.

The k-th BWP is denoted by the number k.

When F1-F1> -TH, F2 is the end point, dividing the frequency range into K2 BWPs starting at F1:

starting from F1, the frequency resources between F1 and F1 are divided into K2 segments in the direction of F1, and the end point of the K-th segment is: d2(K), K is 1, …, K2, d2(K2) F1. The length of each segment is not less than TH, but less than 2 TH. In fig. 4, K2 is 2.

The start point of the K-th BWP for the division is d2(K), and the end point is f2, K1, …, K2. The bandwidth difference between two adjacent BWPs is not less than TH, and such division can effectively reduce power consumption on the UE side.

The K-th BWP is denoted by the number (K1+ K).

After the BWPs are divided, each BWP is configured with a CORESET and a search space for carrying scheduling information of the broadcast service transmitted within the BWP. There are two ways to configure CORESET and search space for each BWP, as follows.

The method comprises the following steps: as shown in fig. 5a, one or more sets of CORESET and search space are uniformly configured for each partitioned BWP within the initial BWP. Each set of CORESET and search space consists of one CORESET and one common search space configured on the CORESET. The divided BWPs share uniformly configured groups of CORESET and search spaces.

Preferably, each of the uniformly configured CORESET may multiplex frequency resources occupied by the CORESET0, may multiplex frequency resources occupied by the CORESET for system messages on the initial BWP, and may multiplex frequency resources occupied by the CORESET for paging messages on the initial BWP.

The second method comprises the following steps: as shown in fig. 5b, the CORESET and the search space are configured for each divided BWP, respectively.

When only one BWP is divided, CORESET and search space are configured on the initial BWP.

When a plurality of BWPs are divided, CORESET and a search space are configured on the initial BWP for theBWP number 0.

When F2-F2> -TH, for K1 BWPs divided within the frequency range [ F1, F2], forBWP number 1, the BWP is configured with CORESET and search space in the area where the BWP does not overlap with the initial BWP. The BWP corresponding to the broadcast service transmitted in the non-overlapping area isBWP 1. For each BWP with the number starting from 2, configuring core and search space in an area where the BWP does not overlap with the previous BWP, where the BWP corresponding to the broadcast service transmitted in the non-overlapping area is the BWP.

When F1-F1> -TH, the same process is applied for K2 BWPs divided within the frequency range [ F1, F2 ]: for a BWP with number K1+1, configure the CORESET and search space for the BWP in the region where the BWP does not overlap with the initial BWP. The BWP corresponding to the broadcast service transmitted in the non-overlapping area is the BWP. For each BWP with the number starting from K1+2, configuring core and search space in an area where the BWP does not overlap with the previous BWP, where the BWP corresponding to the broadcast service transmitted in the non-overlapping area is the BWP.

One or more sets of CORESET and search spaces can be configured in each non-overlapping area, wherein each set of CORESET and search space is composed of one CORESET and one common search space configured on the CORESET. Each set of CORESET and search space is used to carry scheduling information for broadcast services transmitted in the non-overlapping region.

S203, determining a frequency range for configuring the active/inactive DL BWP for each RF class, and when the active/inactive DL BWP configured for the UE is located in the frequency range corresponding to the RF class of the UE and includes a frequency interval for transmitting the broadcast service, the UE may receive any one broadcast service while receiving the unicast service.

The above unicast service is used to indicate a general service other than MBS transmitted in the downlink direction in the NR cell. The logical channels, transport channels and physical channels used by these services are DTCH, DL-SCH and PDSCH, respectively.

In the NR cell, the RF capability of the UE may be classified into a plurality of classes according to the maximum bandwidth that the RF of the UE can support, and the number of RF capability classes of the UE is represented by N. And sorting the RF levels according to the descending order of the maximum bandwidth supported by the RF, and expressing the maximum bandwidth supported by the nth RF capability level by w (n) in MHz.

In order for the UE to receive the broadcast service while receiving the unicast service, the active/inactive DL BWP configured to the UE should include a frequency interval for transmitting the broadcast service. As shown in fig. 3, for a UE with an RF capability level of n, the UE should be configured with active/inactive DL BWP within the frequency range [ F2-w (n), F1+ w (n) ], and the active/inactive DL BWP configured to the UE has a start position within the frequency interval [ F2-w (n), F1], and an end position within the frequency interval [ F2, F1+ w (n) ]. However, if the bandwidth (F2-F1) corresponding to the frequency range for transmitting the broadcast service is greater than w (n), the active/inactive DL BWP configured for the UE cannot include the entire frequency range for transmitting the broadcast service. In this scenario, the UE can receive only a portion of the broadcast traffic while receiving the unicast traffic. For the broadcast service which cannot be received by the UE, the broadcast service is transmitted to the UE through a PTP bearer on the active DL BWP of the UE, or is transmitted to the UE through a PTM bearer additionally established on the active DL BWP of the UE, or the active DL BWP of the UE is reconfigured so that the UE can receive the corresponding broadcast service on the new active DL BWP.

S204, in order to ensure that the UE receives the broadcast service while receiving the unicast service as much as possible, frequency resources are allocated to the multicast service in the regions outside the frequency range [ F2-w (n), F1+ w (n) ], as shown in fig. 3. Furthermore, reservedarea 1 and reservedarea 2 are respectively arranged on the left side and the right side of the frequency range [ F2-w (N), F1+ w (N)) ], the bandwidth of the two areas is respectively G1 and G2, and frequency resources are allocated to multicast traffic in the areas outside the frequency range [ F2-w (N) -G1, F1+ w (N)) + G2 ]. The frequency resources for multicast traffic are indicated by region M.

S205, when the bandwidth (F2-F1) corresponding to the frequency interval [ F1, F2] for transmitting the broadcast service is larger than w (1), under the condition that the frequency interval is ensured to contain the initial BWP, compressing the frequency interval until the bandwidth (F2-F1) corresponding to the frequency interval is not larger than w (1), and simultaneously configuring one or more auxiliary BWPs in the carrier frequency bandwidth for transmitting the broadcast service. The configuration information for each secondary BWP is broadcast on the initial BWP.

Specifically, SIB1, other necessary SIBs, paging messages, and SC-MCCH are broadcast on each secondary BWP. After the UE camps on the cell, the information that the UE can obtain on the initial BWP can be obtained on the secondary BWP, so that the UE does not affect the camping of the UE on the cell while receiving the corresponding broadcast service on the secondary BWP, does not affect the UE receiving the system message and the paging message in the cell, and does not affect the UE initiating the service request in the cell.

In order to enable the UE of RRC _ IDLE/RRC _ INACTIVE to receive the broadcast service on each secondary BWP, the configuration information of each secondary BWP is broadcast on the initial BWP. Specifically, the configuration information of each secondary BWP is broadcasted through the newly added SIB/SC-MCCH on the initial BWP. Of course, the configuration information of each secondary BWP may also be broadcast through an SIB that broadcasts the configuration information of each BWP in the current cell.

S206, for each secondary BWP, to enable the UE to receive the broadcast service transmitted on the secondary BWP while receiving the unicast service, for each RF class, determining a frequency range for configuring an active/inactive DL BWP, and when the active BWP configured for the UE is located in the frequency range corresponding to the RF class of the UE and includes the secondary BWP, the UE may receive any one broadcast service on the secondary BWP while receiving the unicast service.

In order for the UE to receive broadcast traffic transmitted within the frequency interval [ F1, F2] while receiving unicast traffic, active/inactive DL BWP (or inactive BWP) configured to the UE should include the frequency interval [ F1, F2 ]. Similarly, in a scenario where the secondary BWP is configured, in order to enable the UE to receive the broadcast service transmitted on a certain secondary BWP while receiving the unicast service, the active/inactive DL BWP configured for the UE should include the secondary BWP.

Specifically, the frequency interval corresponding to the secondary BWP is represented by [ SF1, SF2], and for the UE with RF capability level n, the UE should be configured with active/inactive DL BWP within the frequency range [ SF2-w (n), SF1+ w (n) ], the start position of the active/inactive DL BWP configured for the UE is within the frequency interval [ SF2-w (n), SF1], and the end position is within the frequency interval [ SF2, SF1+ w (n) ]. Preferably, the broadcast service is configured with respective secondary BWPs within the area M. Preferably, in the area M, resources are preferentially configured for each secondary BWP and the active/inactive DL BWP corresponding to each secondary BWP, and then resources are configured for the multicast service.

As shown in fig. 3, in the method proposed in the embodiment of the present application, the carrier frequency bandwidth of the NR cell is w (mhz). The carrier bandwidth range is denoted by 0, W.

The base station determines a frequency interval for the broadcast service transmission according to the predicted bandwidth for the broadcast service transmission [ F1, F2], which includes the initial BWP, in order for the RRC _ IDLE/RRC _ inactivity state UE to be able to detect the SS/PBCH block, listen to the system messages of the cell, and page messages as usual while receiving the broadcast service. The initial BWP corresponds to a frequency bin of [ f1, f2 ].

In order to avoid bandwidth of the BWP carrying the broadcast service as much as possible being larger than RF capability of the UE and reduce power consumption of the UE as much as possible, the frequency interval for broadcast service transmission may be divided into 1 or more BWPs, each BWP includes an initial BWP, and bandwidth of each BWP is not larger than w (n) as much as possible, where w (n) is a maximum bandwidth supported by the UE with the largest RF capability level in the NR cell, and bandwidth of each BWP is not larger than w (1) as much as possible, and w (1) is a maximum bandwidth supported by the UE with the smallest RF capability level in the NR cell. When the frequency range is divided into a plurality of BWPs, any broadcast service transmitted in the NR cell is transmitted only on a certain divided BWP, and the UE receiving the broadcast service only needs to operate on the BWP transmitting the service and does not need to operate in the entire frequency range, so that the power consumption of the UE can be effectively reduced.

In order for the UE to receive the broadcast service while receiving the unicast service, the active/inactive DL BWP configured to the UE should include a frequency range for transmitting the broadcast service. As shown in fig. 3, for a UE with an RF capability level of n, the UE should be configured with active/inactive BWP within the frequency range [ F2-w (n), F1+ w (n) ], and the active/inactive DL BWP configured to the UE has a start position within the frequency interval [ F2-w (n), F1], and an end position within the frequency interval [ F2, F1+ w (n) ]. However, if the bandwidth (F2-F1) corresponding to the frequency range for transmitting the broadcast service is greater than w (n), the active/inactive DL BWP configured for the UE cannot include the entire frequency range for transmitting the broadcast service. In this scenario, the UE can receive only a portion of the broadcast traffic while receiving the unicast traffic. For the broadcast service which cannot be received by the UE, the broadcast service is transmitted to the UE through a PTP bearer on the active BWP of the UE, or the active BWP of the UE is transmitted to the UE through a PTM bearer which is additionally established, or the active BWP of the UE is reconfigured so that the UE can receive the corresponding broadcast service on the new active BWP.

In order to ensure that the UE receives the broadcast service while receiving the unicast service as much as possible, as shown in fig. 3, the multicast service is allocated with frequency resources as much as possible in the region outside the frequency range [ F2-w (n), F1+ w (n) ]. Further, areserved region 1 and areserved region 2 are respectively arranged on the left side and the right side of the frequency range [ F2-w (N), F1+ w (N) ], and are used for allocating frequency resources for the unicast traffic of the UE, and the bandwidths of the two reserved regions are G1 and G2 respectively. And allocating frequency resources to the multicast service in the region outside the frequency range [ F2-w (N) -G1, F1+ w (N) + G2 ]. The frequency resources for multicast traffic are indicated by region M.

In the above method, for the UE having RRC _ IDLE/RRC _ INACTIVE state with RF capability level n, when the bandwidth (F2-F1) corresponding to the frequency interval for transmitting the broadcast traffic is greater than w (n), the UE cannot receive all broadcast traffic. In this scenario, in order to enable UEs of RRC _ IDLE/RRC _ INACTIVE state of various RF capability levels to receive all broadcast services while camping on a cell, a frequency interval [ F1, F2] for transmitting the broadcast services may be compressed, such that a bandwidth (F2-F1) corresponding to the frequency interval is not greater than w (1), and one or more secondary BWPs are configured within the carrier frequency bandwidth for transmitting the broadcast services, wherein the bandwidth of each secondary BWP is not greater than w (1). The SIB1, other necessary SIBs, paging messages, and SC-MCCH are broadcast on each secondary BWP. After the UE camps on the cell, the information that the UE can obtain on the initial BWP can be obtained on the secondary BWP, so the UE does not affect the camping of the UE on the cell while receiving the corresponding broadcast service on the secondary BWP. In order to enable the UE of RRC _ IDLE/RRC _ INACTIVE state to receive the broadcast service on each secondary BWP, the configuration information of each secondary BWP is broadcast on the initial BWP. Specifically, the configuration information of each secondary BWP is broadcasted through the newly added SIB/SC-MCCH on the initial BWP.

In order for the UE to receive broadcast traffic transmitted within the frequency interval [ F1, F2] while receiving unicast traffic, the active/inactive DL BWP configured to the UE should include the frequency interval [ F1, F2 ]. Similarly, in a scenario where the secondary BWP is configured, in order to enable the UE to receive the broadcast service transmitted on a certain secondary BWP while receiving the unicast service, the active/inactive DL BWP configured for the UE should include the secondary BWP. Specifically, [ SF1, SF2] indicates a frequency bin corresponding to the secondary BWP, and SF2 to SF1< ═ w (1). For a UE with an RF capability level of n, the UE should be configured with active/inactive DL BWP within the frequency range [ SF2-w (n), SF1+ w (n) ], and the active/inactive DL BWP configured to the UE should start at a position within the frequency interval [ SF2-w (n), SF1], and end at a position within the frequency interval [ SF2, SF1+ w (n) ].

Preferably, each secondary BWP is preferentially configured for the broadcast service in the area M, then active/inactive DL BWPs are preferentially configured for the UE in the area M, and then BWPs are preferably configured for the multicast service in the area M.

To sum up, in the method for configuring MBS resources in an NR cell proposed by the present invention, first, a frequency range for transmitting broadcast traffic is determined based on a predicted bandwidth for broadcast traffic transmission, the range including an initial BWP, then, it is proposed to divide a plurality of BWPs within the frequency range to reduce power consumption of a UE as much as possible, and then, in order for the UE to receive broadcast traffic while receiving unicast traffic, it is proposed to configure a frequency range of active/inactive BWPs for the UE based on an RF-supported bandwidth of the UE, and in order to ensure that the UE receives broadcast traffic while receiving unicast traffic as much as possible, it is proposed to configure frequency resources for multicast traffic outside the frequency range for configuring active/inactive BWPs for the UE of the largest RF class. In order to avoid that the UE cannot receive all broadcast services in the corresponding frequency interval when the bandwidth (F2-F1) corresponding to the frequency interval for transmitting the broadcast services is greater than w (1), it is further proposed to configure 1 or more secondary BWPs in the carrier frequency bandwidth for transmitting the broadcast services.

Based on the above embodiments, the present application configures the following resources for MBS in the NR cell:

(1) each BWP is used for transmitting broadcast services.

(2) Each secondary BWP is used for transmitting broadcast traffic.

(3) For configuring the frequency range of active/inactive BWP for the UEs of the respective RF capability levels.

(4) Frequency resources for transmitting multicast traffic.

Next, the present application provides a method for transmitting a broadcast service in an NR cell. When the base station receives a request to set up a broadcast service from the core network, for example: the base station receives the MBS conversation starting request message from the core network, and determines the NR cell for transmitting the service according to the NR cell list or the service zone list for transmitting the service in the corresponding request. The base station transmits the broadcast service in the corresponding cell by adopting the MBS resource configuration method and the broadcast service transmitting method provided by the invention in each NR cell.

Fig. 6 is a signaling interaction diagram of a method for sending a broadcast service in an NR cell according to an embodiment of the present application. The embodiment of the present application specifically describes a transmission process of a broadcast service. As shown in fig. 6, the method for processing the broadcast service includes:

s301, aiming at any broadcast service transmitted in the NR cell, the base station selects one BWP from the divided BWPs for broadcast service transmission to carry and transmit the broadcast service by PTM, and generates PTM configuration information of the broadcast service. For the UE reporting the RRC _ CONNECTED state interested in the broadcast service, if the UE cannot receive the broadcast service through the activated DL BWP, the base station reconfigures the activated DL BWP of the UE so that the UE receives the broadcast service through the reconfigured activated DL BWP, or establishes PTP bearers for the UE to transmit the broadcast service to the UE, or establishes secondary PTM bearers on 1 or more BWPs different from the selected BWP for transmitting the broadcast service to the corresponding UE, and accordingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and secondary PTM bearer configuration information of the broadcast service.

In the NR cell, there are two scenarios in which one BWP is selected from among the divided BWPs for broadcast service transmission for PTM bearer transmission of the broadcast service, and the methods adopted by the base station in the different scenarios are different. The method comprises the following specific steps:

scene one: the base station does not have any information about the UE receiving the service.

In this scenario, the base station selects one BWP from the divided BWPs for carrying and transmitting the service by the PTM, where the BWP has sufficient idle frequency resources for transmitting the broadcast service, so as to ensure that the broadcast service satisfies the corresponding QOS requirement during transmission.

Preferably, the base station preferentially selects a BWP with a small bandwidth and free resources for transmitting the broadcast service. In so doing, the power consumption of the UE is small.

And the base station generates PTM configuration information of the broadcast service for the UE to receive the broadcast service. The base station ends the processing of this step.

Scene two: at least one UE of RRC _ CONNECTED state reports the following broadcast service related information to the base station:

(1) ID of the broadcast service of interest: including at least the ID of the broadcast service.

(2) RF capability of UE: including at least the maximum bandwidth supported by the UE.

In an LTE cell, a UE reports an interested MBMS and other related information to a base station through an interest indication process. In an NR cell, the UE may report the above information to the base station through a similar process. The process of reporting the information is not the content of the invention and is not described in detail.

In this scenario, the base station selects a BWP for the broadcast service based on the following configuration information of each UE that has reported the broadcast service related information.

(1) Configuration information of activated DL BWP of the UE.

(2) Configuration information of other BWPs of the UE.

(3) RF capabilities of the UE.

Specifically, the base station selects one BWP from the divided BWPs for broadcast service transmission, and if the BWP satisfies the following condition, the base station selects to transmit the broadcast service on the BWP by PTM bearer.

(1) This BWP has an frequency intersection with the active DL BWP of the respective UE.

(2) The CORESET and the search space configured on the BWP for transmitting the broadcast service scheduling information are located on the frequency intersection.

(3) Enough idle frequency resources are arranged on the frequency intersection for transmitting the broadcast service, so that the broadcast service can meet the corresponding QOS requirement during transmission.

If there is no BWP meeting the above condition in each divided BWP for broadcast service transmission, the base station selects one BWP, and if the BWP meets the following condition, the base station selects to transmit the broadcast service on the BWP by PTM bearer.

(1) The BWP has an frequency intersection with the BWP of each UE: for each of the UEs, the frequency intersection is located on the active DL BWP of the UE or on some inactive BWP of the UE.

(2) The CORESET and the search space configured on the BWP for transmitting the broadcast service scheduling information are located on the frequency intersection

(3) Enough idle frequency resources are arranged on the frequency intersection for transmitting the broadcast service, so that the broadcast service can meet the corresponding QOS requirement during transmission.

If there is no BWP satisfying the above condition in each divided BWP for broadcast service transmission, the base station selects a BWP for transmitting the broadcast service by PTM bearer, the BWP has enough idle frequency resources for transmitting the broadcast service by PTM bearer, and ensures that the broadcast service satisfies the corresponding QOS requirement during transmission.

After the base station selects one BWP from the divided BWPs for broadcast service transmission according to the method, the base station generates PTM configuration information of the broadcast service after the broadcast service is transmitted by PTM bearing.

Then, the base station performs the following processing:

for any UE reporting the above information, if the frequency resource for transmitting the broadcast service on the selected BWP is not located on the active/inactive DL BWP of the UE, the base station either reconfigures the active DL BWP of the UE, or establishes a PTP bearer for transmitting the broadcast service for the UE, or establishes a secondary PTM bearer for transmitting the broadcast service to the UE.

Specifically, if the base station selects the way of reconfiguring the BWP, the base station reconfigures at least the active DL BWP of the UE, so that the frequency resources for transmitting the broadcast service on the selected BWP are located on the active DL BWP after the reconfiguration of the UE, and there are enough free resources on the active DL BWP after the reconfiguration to carry the existing service of the UE. And the base station generates BWP reconfiguration information for the UE. The UE is capable of simultaneously receiving an existing service and the broadcast service on the reconfigured active DL BWP. In the subsequent step, the base station sends the BWP reconfiguration information and the PTM configuration information of the broadcast service to the UE through dedicated signaling, the UE determines a new activated DL BWP according to the BWP reconfiguration information, receives the existing service on the new activated DL BWP, and receives the broadcast service on the new activated DL BWP according to the PTM configuration information of the broadcast service.

When the base station does not find a suitable frequency resource on the carrier bandwidth for reconfiguring the BWP of the UE, the base station can only transmit the broadcast service to the UE by establishing a PTP bearer.

Specifically, the base station may also directly select to establish a PTP bearer for the UE for transmitting the broadcast service. Before establishing the PTP bearer for the UE, the base station counts the number of the UEs receiving the broadcast service through the PTP bearer.

And when the number of the UE receiving the broadcast service through the PTP bearer is not more than BNUM (the number of beams adopted by SS/PBCH BLOCK in the NR cell), the base station transmits the broadcast service to each UE through the PTP bearer. The method for configuring the PTP bearer for the UE to transmit the broadcast service by the base station specifically includes:

for each UE, the base station performs admission control on the broadcast service on the activated DL BWP of the UE, and when the activated DL BWP has enough idle resources for transmitting the broadcast service by PTP bearer, the base station generates configuration information of the PTP bearer. In the subsequent step, the base station sends the configuration information of the PTP bearer to the corresponding UE through dedicated signaling. The UE establishes PTP bearer on the active DL BWP according to the information to receive the broadcast service, and receives the existing service on the active BWP.

If the admission control on the active DL BWP fails, the base station tries each inactive BWP of the UE in turn or configures a new BWP for the UE. When the base station successfully performs admission control on the broadcast service and the existing service of the UE on an inactive BWP or a new BWP, the base station generates corresponding PTP bearer configuration information and BWP reconfiguration information. In the subsequent step, the base station sends the PTP bearer configuration information and BWP reconfiguration information to the corresponding UE through dedicated signaling. And the UE determines a new activated DL BWP according to the BWP reconfiguration information, receives the existing service on the new activated DL BWP, and receives the broadcast service on the new activated DL BWP according to the PTP bearer configuration information.

When the number of the UEs receiving the broadcast service through the PTP bearer is larger than BNUM, the base station performs the following processing for the UEs receiving the broadcast service through the PTP bearer:

the base station divides the UEs into several groups, with UEs with the same active DL BWP in one group.

When the number of UEs in a group is greater than BNUM, the base station attempts to transmit the broadcast service to the UEs in the group through PTM bearer on the active DL BWP of the group of UEs. And the base station performs admission control on the broadcast service in the active DL BWP of the UE of the group, and when the active DL BWP has enough idle resources for transmitting PTM (packet transfer protocol) bearing, the base station determines to transmit the broadcast service to each UE in the group on the active DL BWP by using the PTM bearing. The PTM bearer configured for the group of UEs is indicated with the secondary PTM bearer so as to be distinguished from the PTM bearer configured on the selected BWP as described above. When more than one group meets the condition of establishing PTM bearing, the base station respectively establishes an auxiliary PTM bearing for each group of UE.

For each secondary PTM bearer, the base station generates corresponding secondary PTM configuration information. In the subsequent step, for the UE receiving the broadcast service through the auxiliary PTM bearer, the base station transmits the corresponding auxiliary PTM configuration information to the UE through a dedicated signaling. And the UE receives the broadcast service according to the received auxiliary PTM configuration information.

If at least one group does not satisfy the condition, the base station continues the following processing for all groups that do not satisfy the condition:

selecting one group, counting the total number of UEs in the group, NUM1, and examining the UEs in all other groups: if the inactive DL BWP of a UE is the active DL BWP of the group of UEs, the UE is recorded. And counting the recordedUE number NUM 2.

If NUM1+ NUM2> BNUM, the base station attempts to transmit the broadcast service to the UEs in the group and each recorded UE over a PTM bearer on the active DL BWP of the group of UEs.

The base station performs admission control on the broadcast service on the activated DL BWP of the group of UEs and performs admission control on the existing service of each recorded UE. When the active DL BWP has enough free resources for transmitting the broadcast service in PTM bearer and there are enough free resources on the active BWP for carrying the existing service of each recorded UE, the base station determines to transmit the broadcast service in PTM bearer on the active BWP to the UEs in the group and the respective recorded UEs.

And the base station generates corresponding secondary PTM configuration information. For each recorded UE, the base station generates BWP reconfiguration information for the UE.

In the subsequent step, the base station sends the secondary PTM configuration information to the UEs in the group through dedicated signaling. Each UE within the group receives the broadcast service over the secondary PTM bearer on the active DL BWP after receiving the dedicated signaling.

In the subsequent step, the base station transmits the secondary PTM configuration information and BWP reconfiguration information to each recorded UE through dedicated signaling. Each recorded UE determines a new activated DL BWP according to the BWP reconfiguration information after receiving the dedicated signaling, receives an existing service on the new activated DL BWP, and receives the broadcast service through the secondary PTM bearer on the new activated DL BWP according to the secondary PTM configuration information.

After the above processing, the base station deletes the group from all the groups that do not satisfy the condition, and deletes all the recorded UEs from the group in which the UEs are located.

However, if NUM1+ NUM2< BNUM, or the admission control fails to be performed on the active DL BWP, the base station keeps the group in all groups that do not satisfy the condition, and each recorded UE also keeps in the group in which the UE is located. Then, the base station selects one group from the remaining groups, and performs the above-described processing on the group. Until the base station performs the above-described processing for all groups.

After the above processing, for each remaining UE that receives the broadcast service through PTP bearer, the base station configures PTP bearer for the UE to transmit the broadcast service. The specific method for configuring the PTP bearer to transmit the broadcast service has been explained above and is not described in detail.

The PTM configuration information of the broadcast service described above includes at least the following:

(1) the location of the frequency intersection on the selected BWP or the location of the frequency resource for broadcast service transmission on the selected BWP.

(2) Configuration information of CORESET and search space configured on frequency intersection or on frequency resources for broadcast service transmission.

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the broadcast service

(4) The high-level configuration information of the broadcast service includes: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(5) Physical layer configuration information, including: PDSCH related configuration information and PDCCH related configuration information. The PDSCH related configuration information at least comprises parameters adopted by the MBS special PDSCH, and the PDCCH related configuration information at least comprises the parameters adopted by the MBS special PDCCH and DRX parameters used for PDCCH monitoring. The DRX parameter for PDCCH monitoring is used to determine a starting position to monitor the PDCCH in each DRX cycle and other parameters for continuously monitoring the PDCCH, such as: an ON-DURATION timer and an inactivity timer.

(6) And when the RBs transmitted by the semi-static resources exist in the RBs contained in the broadcast service, the configuration information of the semi-static resources of each RB.

For each of the above secondary PTM bearers, the secondary PTM configuration information generated by the base station includes at least the following:

(1) the secondary PTM carries configuration information of the BWP in which the secondary PTM is located.

(2) And carrying the CORESET of the secondary PTM carrying scheduling information and the configuration information of the search space on the BWP.

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the broadcast service

(4) The high-level configuration information of the broadcast service includes: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(5) Physical layer configuration information, including: PDSCH related configuration information and PDCCH related configuration information. The PDSCH related configuration information at least comprises parameters adopted by the MBS special PDSCH, and the PDCCH related configuration information at least comprises the parameters adopted by the MBS special PDCCH and DRX parameters used for PDCCH monitoring. The DRX parameter for PDCCH monitoring is used to determine a starting position to monitor the PDCCH in each DRX cycle and other parameters for continuously monitoring the PDCCH, such as: an ON-DURATION timer and an inactivity timer.

(6) And when the RBs transmitted by the semi-static resources exist in the RBs contained in the broadcast service, the configuration information of the semi-static resources of each RB.

The PTP bearer configuration information of the broadcast service described above includes at least the following:

(1) TMGI, session ID of the broadcast service

(2) The high-level configuration information of the broadcast service includes: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(3) Physical layer configuration information, including: PDSCH related configuration information and PDCCH related configuration information. The PDSCH related configuration information at least comprises parameters adopted by the PDSCH, and the PDCCH related configuration information at least comprises parameters adopted by the PDCCH and DRX parameters used for PDCCH monitoring. The DRX parameter for PDCCH monitoring is used to determine a starting position to monitor the PDCCH in each DRX cycle and other parameters for continuously monitoring the PDCCH, such as: an ON-DURATION timer and an inactivity timer.

(4) And when the RBs transmitted by the semi-static resources exist in the RBs contained in the broadcast service, the configuration information of the semi-static resources of each RB.

And the C-RNTI and the SPS C-RNTI configured for the UE when the existing service of the UE is transmitted are used for transmitting the broadcast service to the UE by PTP bearing.

The BWP reconfiguration information at least includes:

(1) DL BWP reconfiguration information: the UE reconfigures DL BWP according to the information, which at least includes: configuration information of the new activated DL BWP for the UE to reconfigure the activated DL BWP.

(2) Reconfiguration information of existing services of the UE: the UE receives the existing service on the newly activated BWP according to the information;

s302: the base station sends the PTM configuration information of the broadcast service in the NR cell through SC-MCCH; and for the UE reporting the RRC _ CONNECTED state interested in the broadcast service, the base station transmits the relevant information to the UE through a special signaling.

Specifically, the base station sends the configuration information of the broadcast service to the UE of RRC _ IDLE/RRC _ inactive state through SC-MCCH so that the UE receives the broadcast service.

More specifically, the base station broadcasts the configuration information of the SC-MCCH through a system message on the initial BWP, and transmits the PTM configuration information of each broadcast service through the SC-MCCH on the initial BWP. The scheduling information of the SC-MCCH may be sent in a corresponding search space on the CORESET0, for example:space 0 is searched. Of course, the SC-MCCH may also multiplex the same CORESET and search space with system messages or paging messages on the initial BWP.

Specifically, the transmitting, by the base station, the related information to the UE through dedicated signaling includes:

(1) if the UE can receive the broadcast service through the activated DL BWP, the base station sends the PTM configuration information of the broadcast service to the UE through a special signaling;

(2) if the BWP of the UE is reconfigured so as to receive the broadcast service transmitted by the PTM bearer, the base station sends the PTM configuration information of the broadcast service and the corresponding BWP reconfiguration information to the UE through a dedicated signaling;

(3) if the base station transmits the broadcast service to the UE by PTP broadcast bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through a dedicated signaling;

(4) if the base station transmits the broadcast service to the UE by PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through a dedicated signaling;

(5) if the base station configures one or more auxiliary PTM bearers for transmitting the broadcast service, for each auxiliary PTM bearer, for a UE adopting the auxiliary PTM bearer to receive the broadcast service, if the auxiliary PTM bearer is located on an activated DL BWP of the UE, the base station transmits configuration information of the auxiliary PTM bearer to the UE through dedicated signaling, and if the auxiliary PTM bearer is not located on the activated DL BWP of the UE, the base station transmits the configuration information and the BWP reconfiguration information of the auxiliary PTM bearer to the UE through dedicated signaling;

the dedicated signaling may be: RRC reconfiguration message.

S303: and the UE receives the SC-MCCH or the special signaling and executes corresponding processing.

For the UE of RRC _ IDLE/RRC _ INDICITY state, the UE receives the corresponding system message to obtain the configuration information of SC-MCCH, then receives the corresponding SC-MCCH, obtains the PTM configuration information of the broadcast service from the SC-MCCH, and receives the broadcast service according to the information.

For the UE reporting the RRC _ CONNECTED state interested in the broadcast service, the UE performs corresponding processing according to the received dedicated signaling, including:

(1) if the special signaling only includes the PTM configuration information of the broadcast service, the UE establishes a corresponding PTM bearer according to the information for receiving the broadcast service.

(2) If the dedicated signaling includes the PTM configuration information and BWP reconfiguration information of the broadcast service, the UE reconfigures BWP according to the BWP reconfiguration information, receives the existing service on the reconfigured active DL BWP, and establishes a corresponding PTM bearer on the reconfigured active DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service.

(3) If the dedicated signaling includes the PTP bearer configuration information, the UE establishes a PTP bearer for receiving the broadcast service on the activated DL BWP according to the information, and receives the broadcast service through the PTP bearer.

(4) If the dedicated signaling includes PTP bearer configuration information and DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives the existing service on the reconfigured active DL BWP, establishes PTP bearer for receiving the broadcast service on the reconfigured active DL BWP according to the PTP bearer configuration information, and receives the broadcast service through the PTP bearer.

(5) If the dedicated signaling includes the auxiliary PTM configuration information of the broadcast service, the UE establishes a corresponding auxiliary PTM bearer on the activated DL BWP according to the information, and the auxiliary PTM bearer is used for receiving the broadcast service.

(6) If the dedicated signaling includes the secondary PTM configuration information and the DL BWP reconfiguration information of the broadcast service, the UE reconfigures the DL BWP according to the DL BWP reconfiguration information, receives the existing service on the reconfigured active DL BWP, and establishes a corresponding secondary PTM bearer on the reconfigured active DL BWP according to the secondary PTM bearer configuration information for receiving the broadcast service.

S304: and the base station adopts corresponding bearing to send the broadcast service.

In summary, the base station transmitting the broadcast service by using the corresponding bearer includes:

(1) and the base station sends the broadcast service through PTM bearing on a corresponding BWP according to the PTM configuration information of the broadcast service.

(2) For the UE receiving the broadcast service through the PTP bearer, the base station sends the broadcast service through the PTP bearer on the corresponding BWP according to the configuration information of the PTP bearer configured for the UE.

(3) When the base station configures the secondary PTM bearer, the base station transmits the broadcast service through the secondary PTM bearer on the corresponding BWP according to the configuration information of each secondary PTM bearer.

Based on the PTM configuration information of the broadcast service, the base station sending the broadcast service on the corresponding BWP by using a PTM bearer includes: the base station sends a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by a G-RNTI, the G-RNTI is used for marking the broadcast service on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is formed by the data of the broadcast service, and the PDSCH adopts G-RNTI when bits are scrambled.

When the PTM configuration information of the broadcast service comprises configuration information of semi-static resources of at least one RB, for each RB transmitted by the semi-static resources, a base station periodically transmits a PSDCH by adopting the corresponding semi-static resources on a corresponding BWP, a TB on the PDSCH is formed by the data of the RB of the broadcast service, and the PDSCH adopts SPS G-RNTI when in bit scrambling. And when the TB is retransmitted on the PDSCH, the base station sends a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by SPS G-RNTI, the SPS G-RNTI is used for marking the broadcast service on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is the retransmitted TB, and the PDSCH adopts SPS G-RNTI when bits are scrambled.

For a UE receiving the broadcast service through a PTP bearer, a base station transmitting the broadcast service to the UE through the PTP bearer on a corresponding BWP based on PTP bearer configuration information includes: the base station sends a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by a C-RNTI, the C-RNTI is used for marking UE on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is formed by the data of the broadcast service, and the PDSCH adopts the C-RNTI when bits are scrambled.

For UE receiving the broadcast service through PTP bearer, when the PTP bearer configuration information comprises configuration information of semi-static resources of at least one RB, for each RB transmitted in the semi-static resources, a base station periodically transmits a PSDCH by adopting the corresponding semi-static resources on a corresponding BWP, a TB on the PDSCH is composed of the data of the RB of the broadcast service, and the PDSCH adopts SPS C-RNTI when in bit scrambling. And when the TB is retransmitted on the PDSCH, the base station sends a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by using SPS C-RNTI, the SPS C-RNTI is used for marking the UE on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is a retransmitted TB, and the PDSCH adopts SPS C-RNTI when bits are scrambled.

For the UE receiving the broadcast service by the secondary PTM bearer, the base station adopting the PTM bearer to send the broadcast service on the corresponding BWP based on the configuration information of the secondary PTM bearer comprises the following steps: the base station sends a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by a G-RNTI, the G-RNTI is used for marking the broadcast service on an air interface, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is formed by the data of the broadcast service, and the PDSCH adopts G-RNTI when bits are scrambled.

When the auxiliary PTM configuration information of the broadcast service comprises configuration information of semi-static resources of at least one RB, for each RB transmitted by the semi-static resources, a base station periodically transmits a PSDCH by adopting the corresponding semi-static resources on a corresponding BWP, a TB on the PDSCH is formed by the data of the RB of the broadcast service, and the PDSCH adopts SPS G-RNTI when in bit scrambling. And when the TB is retransmitted on the PDSCH, the base station transmits a corresponding PDCCH and a corresponding PDSCH on a corresponding BWP, the CRC of the PDCCH is scrambled by SPS G-RNTI, and the DCI format on the PDCCH is scheduling information of the corresponding PDSCH. And the TB on the PDSCH is the retransmitted TB, and the PDSCH adopts SPS G-RNTI when bits are scrambled.

When the broadcast service is transmitted through PTM bearing/auxiliary PTM bearing/PTP bearing, if at least one RB of the broadcast service is transmitted in semi-static resources, the rest RBs of the broadcast service are transmitted through PTM bearing/auxiliary PTM bearing/PTP bearing, and the TBs on the PDSCH allocated to the PTM bearing/auxiliary PTM bearing/PTP bearing are only composed of the data of the rest RBs of the broadcast service.

For the PTM bearer and the auxiliary PTM bearer transmitting the same broadcast service, the base station may allocate the same G-RNTI and the same SPS G-RNTI to these bearers for identifying the broadcast service at an air interface.

S305: and the UE receives the broadcast service through the corresponding bearer.

For the UE of RRC _ IDLE/RRC _ INDICITY state, the UE receives the broadcast service through the PTM bearer

For the UE of RRC _ CONNECTED state, the receiving, by the UE, the broadcast service through the corresponding bearer includes:

(1) and when the special signaling comprises the PTM configuration information of the broadcast service, the UE receives the broadcast service through a PTM bearer.

(2) And when the dedicated signaling comprises PTP bearer configuration information, the UE receives the broadcast service through the PTP bearer.

(3) And when the special signaling comprises the auxiliary PTM bearing configuration information, the UE receives the broadcast service through the auxiliary PTM bearing.

For the UE of RRC _ IDLE/RRC _ INDICITY state, the UE monitors PDCCH scrambled by G-RNTI for CRC in a corresponding search space on corresponding CORESET on corresponding BWP according to PTM configuration information of the broadcast service, after monitoring the corresponding PDCCH, the UE determines scheduling information of PDSCH carrying the broadcast service according to a DCI format on the PDCCH, and receives corresponding PDSCH according to the information to obtain the broadcast service.

When the PTM configuration information of the broadcast service includes configuration information of semi-static resources of at least one RB, for each RB transmitted in the semi-static resources, the UE receives a corresponding PDSCH on a corresponding BWP from a corresponding location using the corresponding semi-static resources, and obtains a TB from the PDSCH, where the TB is composed of data of the corresponding RB in the broadcast service. The UE also needs to monitor the PDCCH scrambled by SPS G-RNTI for CRC on the corresponding BWP, and when monitoring the corresponding PDCCH, receive the corresponding PDSCH according to the DCI format on the PDCCH, and obtain the retransmitted TB from the PDSCH.

For the UE of RRC _ CONNECTED state, when the UE determines to receive the broadcast service through the PTM bearer, the UE performs the same processing as the processing performed by the UE of RRC _ IDLE/RRC _ inactive state described above.

For the UE of the RRC _ CONNECTED state, when the UE determines to receive the broadcast service through PTP bearing, the UE monitors a PDCCH scrambled by a C-RNTI for CRC in a corresponding search space on a corresponding CORESET on a corresponding BWP, after monitoring the corresponding PDCCH, the UE determines scheduling information of a PDSCH bearing the broadcast service according to a DCI format on the PDCCH, and receives a corresponding PDSCH according to the information to obtain the broadcast service. And the corresponding search space on the corresponding CORESET on the corresponding BWP is used for carrying the scheduling information of the broadcast service.

When the PTP bearer configuration information includes configuration information of semi-static resources of at least one RB, for each RB transmitted in the semi-static resources, the UE receives a corresponding PDSCH on a corresponding BWP from a corresponding position using the corresponding semi-static resources, and obtains a TB from the PDSCH, where the TB is composed of data of the corresponding RB in the broadcast service. The UE also needs to monitor the PDCCH scrambled by the SPS C-RNTI for the CRC on the corresponding BWP, and when the corresponding PDCCH is monitored, receive the corresponding PDSCH according to the DCI format on the PDCCH, and obtain the retransmitted TB from the PDSCH.

For the UE of RRC _ CONNECTED state, when the UE determines to receive the broadcast service by the auxiliary PTM bearer, the UE monitors the PDCCH scrambled by the G-RNTI for CRC on the corresponding BWP, after monitoring the corresponding PDCCH, the UE determines the scheduling information of the PDSCH bearing the broadcast service according to the DCI format on the PDCCH, and receives the corresponding PDSCH according to the information to obtain the broadcast service.

When the secondary PTM configuration information of the broadcast service comprises configuration information of semi-static resources of at least one RB, for each RB transmitted by the semi-static resources, the UE receives a corresponding PDSCH from a corresponding position on a corresponding BWP by adopting the corresponding semi-static resources, and obtains a TB from the PDSCH, wherein the TB is composed of data of the corresponding RB in the broadcast service. The UE also needs to monitor the PDCCH scrambled by SPS G-RNTI for CRC on the corresponding BWP, and when monitoring the corresponding PDCCH, receive the corresponding PDSCH according to the DCI format on the PDCCH, and obtain the retransmitted TB from the PDSCH.

In summary, based on the MBS resource allocation method provided by the present invention, the broadcast service transmission method provided by the present invention includes the above 5 steps. In the method for sending the broadcast service, the base station sends the broadcast service through the PTM bearer, the PTP bearer and the auxiliary PTM bearer, and the UE receives the broadcast service through the PTM bearer, the PTP bearer or the auxiliary PTM bearer according to the self state and the relevant information obtained from the base station.

In the method of the present invention, in the second step, the configuration information carried by each secondary PTM of the broadcast service may also be sent through an SC-MCCH.

In the sending process of the broadcast service, the broadcast service transmission method of the present invention further includes: for the UE of RRC _ IDLE/RRC _ INDICITY state, if the UE can not receive the broadcast service through the PTM bearer or the auxiliary PTM bearer, the UE reports the relevant information of the broadcast service to the base station. The content of the broadcast service related information is described in the second scenario in step S301 in the embodiment shown in fig. 6.

The failure of the UE to receive the broadcast service through the PTM bearer or the secondary PTM bearer may include the following scenarios:

the UE cannot do this without switching BWP: the broadcast service is received while the related information is received on the initial BWP. Such as: as shown in fig. 1, the location of the frequency resource carrying the broadcast service is outside the BWP configuration range corresponding to the RF level of the UE.

In the sending process of the broadcast service, the broadcast service transmission method of the present invention further includes: for the UE in the RRC _ CONNECTED state, if the UE cannot receive the broadcast service through the PTM bearer or the secondary PTM bearer on the activated DL BWP or the extended activated DL BWP, the UE reports the broadcast service related information to the base station.

For the UE of the RRC _ CONNECTED state, when the UE cannot receive the broadcast service transmitted through the PTM bearer or the secondary PTM bearer through the active DL BWP, if the UE can include the frequency resource carrying the broadcast service by automatically extending the frequency coverage of the active DL BWP based on its own RF capability level, it is considered that the UE can receive the broadcast service through the PTM bearer or the secondary PTM bearer on the extended active DL BWP, and the UE does not need to report related information to the base station, and the UE can automatically extend the active DL BWP and receive the broadcast service on the corresponding frequency resource on the extended active DL BWP, but at the same time, the UE receives the existing service on the originally active DL BWP on the extended active DL BWP.

In the sending process of the broadcast service, the broadcast service transmission method of the present invention further includes: the base station provides the broadcast service to each reported UE according to the received related information reported by the UE in the following ways, including S31-S36:

s31: and replacing the BWP where the PTM bearer is located so as to enable all or a part of the UEs reporting the relevant information to receive the broadcast service on the new BWP. When the base station finds the BWP satisfying the above condition, the base station generates new PTM configuration information for the broadcast service. If the base station cannot find the BWP meeting the condition or some UE still cannot receive the broadcast service on the new BWP by PTM bearing, the base station reconfigures the BWP, establishes an auxiliary PTM bearing or PTP bearing for transmitting the broadcast service to the related UE, and generates corresponding BWP reconfiguration information, auxiliary PTM configuration information and PTP bearing configuration information.

The specific processing in this step refers to the processing in the scenario two in the first step of the broadcast service sending method.

S32: the base station sends corresponding information to corresponding UE through SC-MCCH and special signaling

Specifically, the base station sends the following information through the SC-MCCH in the NR cell:

(1) new PTM configuration information of said broadcast service

(2) For the broadcast service, the secondary PTM configuration information of each original secondary PTM bearing

(3) For the broadcast service, the secondary PTM configuration information of each newly-built secondary PTM bearer

For a specific method for the base station to send the corresponding information to the corresponding UE through the dedicated signaling, refer to the related processing in the second step of the broadcast service sending method.

After executing the above two steps, the base station executes the following three steps of processing, and please refer to the processing of S303-S305 in the broadcast service transmitting method in the following steps of S33-S35, which are not described again.

S33: and the UE receives the SC-MCCH or the special signaling and executes corresponding processing.

S34: and the base station adopts corresponding bearing to send the broadcast service.

S35: and the UE receives the broadcast service through the corresponding bearer.

On the basis of the above embodiment, after configuring relevant resources for MBS in an NR cell, the present application further provides a method for transmitting a multicast service in the NR cell. When the base station receives a request for establishing a multicast service from a core network, the base station determines UE for receiving the multicast service according to a UE list in the corresponding request, and the base station transmits the multicast service to the corresponding UE in the corresponding NR cell. Such as: the base station receives 'MBS conversation starting request information' from the core network, the information carries a UE list used for indicating the UE receiving the multicast service, and the base station transmits the multicast service to the corresponding UE in the corresponding NR cell based on the request. The configuration method of MBS resources and the sending method of multicast service provided by the invention are as follows:

in the inventive method, a UE receiving a multicast service may have a unicast service being received, but need not receive a certain broadcast service.

Fig. 7 is a signaling interaction diagram of a method for sending a multicast service in an NR cell according to an embodiment of the present application. The embodiment of the present application specifically describes a transmission process of a multicast service. As shown in fig. 7, the method for processing the multicast service includes:

s401: for any one NR cell, the base station determines BWPs for transmitting the multicast service, and preferentially configures each of the BWPs in a region M of the cell. CORESET and search space are configured on each BWP.

S402: according to the first message from the core network, the base station determines the multicast service to be transmitted, and according to the UE list in the message, the base station determines each NR cell for transmitting the multicast service. When at least one UE in an NR cell is located in the UE list, the cell needs to send the multicast service, and the first message is a request message for establishing the multicast service.

After the core network receives the control plane information of a multicast service from the MBS server, the core network establishes a control plane information transmission path for the multicast service and transmits the control plane information of the multicast service to the base station through the path. In a multicast service bearer establishment phase, the control plane information of the multicast service transmitted to the base station is a request for establishing the multicast service. The "request to establish a multicast service" message is used herein to mean a request message instructing a base station to establish a radio bearer for a multicast service during a multicast service establishment phase.

S403: and the base station selects BWP (broadband multicast protocol) for sending the multicast service in each cell transmitting the multicast service and generates related configuration information.

Specifically, there are two scenarios for selecting BWP for the multicast service, and the base station selects BWP for transmitting the multicast service in different scenarios by using different methods. The method comprises the following specific steps:

scene one: in the NR cell, each UE receiving the multicast service is in RRC _ IDLE/RRC _ inactive state before receiving the multicast service.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is less than BNUM, PTP bearers may be established for each UE receiving the multicast service for transmitting the multicast service.

Specifically, the base station selects a common BWP with sufficient idle resources according to the service type of the multicast service for configuring PTP bearers for each UE receiving the multicast service, or selects a BWP with sufficient idle resources from the configured BWPs for transmitting the multicast service for configuring PTP bearers for each UE receiving the multicast service, and accordingly, the base station generates PTP bearer configuration information for each UE receiving the multicast service.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is less than the BNUM, the base station may further select one BWP with sufficient idle resources from the configured BWPs for multicast service transmission to transmit the multicast service through a PTM bearer, and generate PTM configuration information of the multicast service, which is used for the UEs to receive the multicast service. And when the broadcast service is transmitted in the PTM bearer, the multicast service is transmitted in the PTM bearer only in the beam in which the UE receiving the multicast service is positioned. Such as: the total number of beams transmitting the SS/PBCH BLOCK in the cell is 8, 6 UEs in the cell receive the multicast service, the 6 UEs are positioned in four beams, wherein the UE1, the UE2 and the UE3 are respectively positioned in thebeams 1, 2 and 3, the UE 4, 5 and 6 are positioned in the beam 4, and then the base station transmits the multicast service through PTM (packet transport protocol) by adopting thebeams 1, 2, 3 and 4 in the cell.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is not less than BNUM, the base station selects one BWP with sufficient idle resources from the configured BWPs for multicast service transmission to transmit the multicast service through a PTM bearer, and generates PTM configuration information of the multicast service, which is used for the UEs to receive the multicast service. The processing of this step is ended.

Scene two: in the NR cell, at least one UE among the UEs receiving the multicast service receives the unicast service at RRC _ CONNECTED state before receiving the multicast service

The base station selects BWP for the multicast service based on the following information for each UE receiving the unicast service at RRC _ CONNECTED state, for transmitting the multicast service, and generates corresponding configuration information.

(1) RF capability: maximum bandwidth supported

(2) Configuration information of active DL BWP of UE and configuration information of other DL BWPs

In the above scenario, if the number of UEs receiving the multicast service in the current cell is less than BNUM, PTP bearers may be established for each UE receiving the multicast service for transmitting the multicast service.

Specifically, the base station selects a common BWP with sufficient idle resources according to the service type of the multicast service, to configure PTP bearers for each UE receiving the multicast service and without unicast service, or selects a BWP with sufficient idle resources from the configured BWPs for transmitting the multicast service, to configure PTP bearers for each UE receiving the multicast service and without unicast service, and accordingly, the base station generates PTP bearer configuration information for each UE receiving the multicast service and without unicast service.

The base station may further divide the UEs receiving the multicast traffic and having the unicast traffic into a plurality of groups, and the UEs in each group have the same active DL BWP. The number of UEs in each group is determined. And recording the activated DL BWPs of each group of UEs in sequence according to the at least order of the number of the UEs in the group.

And if the BWP has enough idle resources for configuring PTP bearer for each UE which receives the multicast service and does not have the unicast service for transmitting the multicast service, the base station generates corresponding PTP bearer configuration information for each UE which receives the multicast service and does not have the unicast service. Otherwise, the base station tries each recorded active DL BWP in turn in order. If none of the active DL BWPs satisfies the condition, the base station selects BWP for attempting among other common BWPs or configured BWPs for multicast traffic transmission. And when the admission control is successful on a BWP, the base station generates corresponding PTP bearer configuration information for each UE which receives the multicast service and does not have the unicast service.

For the UE receiving the multicast service and having the unicast service, if the selected BWP is not the active DL BWP of the UE, the base station reconfigures the BWP of the UE, or configures a PTP bearer on the active DL BWP of the UE for transmitting the multicast service.

Specifically, if the base station selects the BWP reconfiguration mode, the base station configures the activated DL BWP of the UE as the selected BWP, and performs admission control on the selected BWP, and if there are enough idle resources on the selected BWP for carrying the existing service of the UE and enough resources for transmitting the multicast service to the UE by PTP bearer, the base station generates corresponding BWP reconfiguration information and corresponding PTP bearer configuration information.

When there are not enough resources on the selected BWP for reconfiguring the BWP of the UE, the base station can only transmit the broadcast service to the UE through the PTP bearer.

The method for configuring the PTP bearer for transmitting the multicast service to the UE and the method for configuring the PTP bearer for transmitting the broadcast service to the UE are not described in detail again.

In the above scenario, if the number of UEs receiving the multicast service in the current cell is not less than the BNUM, when the base station selects a BWP from the configured BWPs for transmitting the multicast service, the frequency resource for transmitting the multicast service on the selected BWP is located on the active DL BWP or the inactive DL BWP of the UE receiving the multicast service and having the unicast service as much as possible.

After selecting BWP, the base station generates PTM configuration information of the multicast service. Then, the base station performs the following processing:

for any UE reporting the above information, if the frequency resource for transmitting the multicast service on the selected BWP is not located on the activated DL BWP of the UE, the base station reconfigures the BWP of the UE, so that the frequency resource for transmitting the multicast service on the selected BWP is located on the activated DL BWP after the reconfiguration of the UE, or establishes a PTP bearer for transmitting the multicast service for the UE, or establishes a secondary PTM bearer for transmitting the multicast service to the UE.

Specifically, a method for a base station to reconfigure BWP for the UE receiving the multicast service, a method for establishing PTP bearer for the UE receiving the multicast service, and a method for configuring secondary PTM bearer for the UE receiving the multicast service refer to corresponding processing in scenario two in the first step of the method for transmitting broadcast service in the present invention.

Through the above processing, the base station generates the following configuration information:

(1) if the BWP of the UE is reconfigured so as to receive the multicast service transmitted by the PTM bearer, the base station generates corresponding BWP reconfiguration information for the UE;

(2) if a base station configures PTP bearer for UE on activated DL BWP of the UE for transmitting the multicast service to the UE, the base station generates configuration information of the PTP bearer for the UE;

(3) if the base station configures PTP bearer for the UE on the reconfigured activated DL BWP for transmitting the multicast service to the UE, the base station generates PTP bearer configuration information and BWP reconfiguration information for the UE.

(4) If the base station configures one or more auxiliary PTM bearers for transmitting the multicast service, for each auxiliary PTM bearer, for the UE adopting the auxiliary PTM bearer to receive the multicast service, if the auxiliary PTM bearer is not located on the activated DL BWP of the UE, the base station generates BWP reconfiguration information for the UE.

The PTM configuration information of the multicast service generated by the base station at least comprises:

(1) location of frequency resource on BWP transmitting the multicast service for transmitting the multicast service

(2) CORESET configured on frequency resources for multicast traffic transmission and configuration information of search space

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the multicast service

(4) The high-level configuration information of the multicast service includes: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(5) Physical layer configuration information, including: PDSCH related configuration information and PDCCH related configuration information. The PDSCH related configuration information at least comprises parameters adopted by the MBS special PDSCH, and the PDCCH related configuration information at least comprises the parameters adopted by the MBS special PDCCH and DRX parameters used for PDCCH monitoring. The DRX parameter for PDCCH monitoring is used to determine a starting position to monitor the PDCCH in each DRX cycle and other parameters for continuously monitoring the PDCCH, such as: an ON-DURATION timer and an inactivity timer.

(6) And when the RBs transmitted by the semi-static resources exist in the RBs contained in the multicast service, the configuration information of the semi-static resources of each RB.

For each secondary PTM bearer used for transmitting the multicast service, the secondary PTM configuration information generated by the base station at least comprises the following contents:

(1) configuration information of BWP where the secondary PTM bearer is located

(2) CORESET for bearing the auxiliary PTM bearing scheduling information on the BWP and configuration information of search space

(3) TMGI, session ID, G-RNTI and SPS G-RNTI of the multicast service

(4) The high-level configuration information of the multicast service includes: SDAP layer configuration information, PDCP layer configuration information, RLC layer configuration information, and the like

(5) Physical layer configuration information, including: PDSCH related configuration information and PDCCH related configuration information. The PDSCH related configuration information at least comprises parameters adopted by the MBS special PDSCH, and the PDCCH related configuration information at least comprises the parameters adopted by the MBS special PDCCH and DRX parameters used for PDCCH monitoring. The DRX parameter for PDCCH monitoring is used to determine a starting position to monitor the PDCCH in each DRX cycle and other parameters for continuously monitoring the PDCCH, such as: an ON-DURATION timer and an inactivity timer.

(6) And when the RBs transmitted by the semi-static resources exist in the RBs contained in the multicast service, the configuration information of the semi-static resources of each RB.

The PTP bearer configuration information is the same as the PTP bearer configuration information in step S301 in the embodiment of the present application shown in fig. 6, and is not described again.

The BWP reconfiguration information is the same as the BWP reconfiguration information in step S301 in the embodiment of the present application shown in fig. 6, and is not described again.

S404: and the base station sends the relevant configuration information to each UE receiving the multicast service through special signaling.

Specifically, the transmitting, by the base station, the related information to the UE through dedicated signaling includes:

(1) if the UE can receive the multicast service through the activated DL BWP, the base station sends the PTM configuration information of the multicast service to the UE through a special signaling;

(2) if the BWP of the UE is reconfigured so as to receive the multicast service transmitted by the PTM bearer, the base station sends the PTM configuration information of the multicast service and the corresponding BWP reconfiguration information to the UE through a dedicated signaling;

(3) if the base station transmits the multicast service to the UE by PTP bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through a dedicated signaling;

(4) if the base station transmits the multicast service to the UE by PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through a dedicated signaling;

(5) if the base station configures one or more auxiliary PTM bearers for transmitting the multicast service, for each auxiliary PTM bearer, for the UE adopting the auxiliary PTM bearer to receive the multicast service, if the auxiliary PTM bearer is located on the activated DL BWP of the UE, the base station transmits the configuration information of the auxiliary PTM bearer to the UE through dedicated signaling, and if the auxiliary PTM bearer is not located on the activated DL BWP of the UE, the base station transmits the configuration information and the BWP reconfiguration information of the auxiliary PTM bearer to the UE through dedicated signaling;

the dedicated signaling may be an RRC reconfiguration message.

S405: and the UE receives the special signaling sent by the base station, and establishes a corresponding bearer for receiving the multicast service according to the special signaling.

The UE executes corresponding processing according to the received special signaling, and the processing comprises the following steps:

(1) if the special signaling only includes the PTM configuration information of the multicast service, the UE establishes a corresponding PTM bearer for receiving the multicast service according to the information.

(2) If the special signaling includes the PTM configuration information and the BWP reconfiguration information of the multicast service, the UE reconfigures the BWP according to the BWP reconfiguration information, the UE receives the existing service on the reconfigured activated DL BWP, and establishes a corresponding PTM bearer on the reconfigured activated DL BWP according to the PTM configuration information of the multicast service for receiving the multicast service.

(3) If the dedicated signaling includes the PTP bearer configuration information, the UE establishes a PTP bearer for receiving the multicast service on the activated DL BWP according to the information, and receives the multicast service through the PTP bearer.

(4) If the dedicated signaling includes PTP bearer configuration information and BWP reconfiguration information, the UE reconfigures BWP according to the BWP reconfiguration information, receives the existing service on the reconfigured activated DL BWP, establishes PTP bearer for receiving the multicast service on the reconfigured activated DL BWP according to the PTP bearer configuration information, and receives the multicast service through the PTP bearer.

(5) If the special signaling includes the auxiliary PTM configuration information of the multicast service, the UE establishes a corresponding auxiliary PTM bearer on the activated DL BWP according to the information for receiving the multicast service.

(6) If the dedicated signaling includes the secondary PTM configuration information and the BWP reconfiguration information of the multicast service, the UE reconfigures the BWP according to the BWP reconfiguration information, receives the existing service on the reconfigured active DL BWP, and establishes a corresponding secondary PTM bearer on the reconfigured active DL BWP according to the secondary PTM bearer configuration information for receiving the multicast service.

S406: and the base station sends the multicast service in the NR cell through a corresponding bearer.

Specifically, the sending, by the base station, the multicast service through the corresponding bearer in the NR cell includes:

(1) transmitting the multicast service over a PTM bearer

(2) Transmitting the multicast service over a PTP bearer

(3) Transmitting the multicast service through a secondary PTM bearer

S407: and the UE receives the multicast service through the corresponding bearer.

Specifically, the receiving, by the UE, the multicast service through the corresponding bearer includes:

(1) and when the special signaling comprises the PTM configuration information of the multicast service, the UE receives the multicast service through a PTM bearer.

(2) When the dedicated signaling comprises the PTP bearer configuration information, the UE receives the multicast service through the PTP bearer

(3) When the special signaling includes the auxiliary PTM bearing configuration information, the UE receives the multicast service through the auxiliary PTM bearing

The method for receiving the multicast service by the UE through the PTM bearer, PTP bearer, and secondary PTM bearer is the same as the method for receiving the broadcast service by the UE through the PTM bearer, PTP bearer, and secondary PTM bearer in the embodiment of the present application shown in fig. 6. And will not be described in detail.

In the above processing, G-RNTI and SPS G-RNTI are allocated to the PTM bearer and the secondary PTM bearer in a unified manner, that is: when the same multicast service is sent through different PTM bearers, the same G-RNTI and SPS G-RNTI are adopted, and each multicast service has a unique identifier at an air interface: G-RNTI and SPS G-RNTI.

On the basis of the above embodiments, after configuring relevant resources for MBS in NR cell, active DL BWP and inactive DL BWP may be configured for UE. Fig. 8 is a flowchart illustrating a method for configuring an active DL BWP and an inactive DL BWP according to an embodiment of the present application. As shown in fig. 8, for a UE of RRC _ CONNECTED state, when the UE accesses a cell through an initial BWP, the following method is adopted when the UE is configured with the BWP for transmitting the normal traffic:

s501, configuring a plurality of common BWPs in advance, where each common BWP corresponds to one service type or multiple service types.

For example; the URLLC is configured with one or more BWPs, the voice service is configured with one or more BWPs, the data service is configured with one or more BWPs, and the video service is configured with one or more BWPs. One or more BWPs may also be configured, where each BWP is used to transport multiple traffic types.

It should be noted that configuring one or more common BWPs in the embodiments of the present application is only one possibility in the embodiments of the present application, and constitutes a limitation to the present application.

S502, preferentially configuring the common BWP for the UE or preferentially configuring the special BWP for the UE.

The method comprises the following steps: the UE is preferentially configured with normal BWP.

Specifically, the base station selects one or more BWPs from 1 or more common BWPs corresponding to the service type according to the service type of the UE, and configures the BWPs to the UE.

Then, the UE may also be configured with 1 or more special BWPs, each of which includes a frequency range [ F1, F2] for the broadcast service.

The UE may also be configured with 1 or more special BWPs, each containing one secondary BWP

The second method comprises the following steps: the UE is preferentially configured with a special BWP.

Specifically, the UE is configured with 1 or more special BWPs including a frequency interval for broadcasting service F1, F2 or one secondary BWP, according to the RF capability of the UE.

The UE may also be configured with 1 or more normal BWPs.

When there is no corresponding resource to configure the UE with a special BWP, 1 or more general BWPs are configured to the UE according to the traffic type of the UE.

The method for configuring the special BWP for the UE is shown in S203 and S206 of the MBS resource configuration method in the present invention.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Fig. 9 is a schematic structural diagram of a device for configuring MBS resources in an NR cell according to an embodiment of the present application. The apparatus may be implemented by software, hardware or a combination of both, and may be, for example, the base station in the above embodiments to perform the method in the above embodiments. As shown in fig. 9, theapparatus 600 for configuring MBS resources in an NR cell includes:

a first determiningmodule 601, configured to determine a frequency interval for broadcast service transmission according to an expected bandwidth for broadcast service transmission, where the frequency interval includes an initial bandwidth portion BWP;

adividing module 602, configured to divide a frequency interval into one or more BWPs, and configure a control resource set, CORESET, and a search space on each divided BWP, where the CORESET and the search space are used to send scheduling information of a broadcast service transmitted on a corresponding BWP;

a second determiningmodule 603, configured to determine, for each radio frequency RF class, a frequency range for configuring an active/inactive DL BWP, where when the active/inactive DL BWP configured for the UE is located in the frequency range corresponding to the RF class of the UE and includes a frequency interval for transmitting a broadcast service, the UE may receive any one broadcast service while receiving a unicast service;

a third determiningmodule 604, configured to configure, for ensuring that the UE receives the broadcast service while receiving the unicast service, frequency resources for the multicast service in a region outside a frequency range corresponding to a maximum RF level, or set reserved regions on left and right sides of the frequency range corresponding to the maximum RF level, respectively, and configure frequency resources for the multicast service in the frequency range corresponding to the maximum RF level and the region outside the reserved regions;

acompressing module 605, configured to, when a bandwidth corresponding to a frequency interval for transmitting the broadcast service is greater than a maximum bandwidth supported by a UE with a minimum radio frequency class, compress the bandwidth corresponding to the frequency interval not greater than the maximum bandwidth supported by the UE with the minimum radio frequency class under a condition that the frequency interval is guaranteed to include an initial BWP, configure one or more secondary BWPs in a carrier frequency bandwidth for transmitting the broadcast service, and broadcast configuration information of each secondary BWP on the initial BWP;

aprocessing module 606, configured to, for each secondary BWP, determine, for each RF class, a frequency range for activating/deactivating DL BWP configuration in order to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, and when the activated BWP configured for the UE is located in the frequency range corresponding to the RF class of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

Optionally, the first determiningmodule 601 is specifically configured to predict a bandwidth used for broadcast service transmission; determining a bandwidth that can be actually used for broadcast service transmission on the entire initial BWP on the premise that the initial BWP is used for transmitting the broadcast service; a frequency interval for broadcast service transmission within a cell is determined.

Optionally, thedividing module 602 is specifically configured to uniformly configure one or more sets of CORESET and search space for each divided BWP in the initial BWP, where each set of CORESET and search space is formed by a CORESET and a common search space configured on the CORESET; alternatively, the CORESET and the search space are configured for each divided BWP separately.

The apparatus for configuring MBS resources in an NR cell provided in this embodiment is used to implement the method for configuring MBS resources in an NR cell, which is not described herein again.

Fig. 10 is a schematic structural diagram of an apparatus for configuring an active BWP and an inactive BWP according to an embodiment of the present application. The apparatus may be implemented by software, hardware or a combination of both, and may be, for example, the base station in the above embodiments to perform the method in the above embodiments. As shown in fig. 9, theapparatus 700 for configuring active BWP and inactive BWP includes:

aconfiguration module 701, configured to pre-configure a plurality of common BWPs, where each common BWP corresponds to one service type or multiple service types;

an allocatingmodule 702, configured to preferentially configure a general BWP for the UE or preferentially configure a special BWP for the UE, where each of the special BWPs includes a frequency interval for transmitting the broadcast service or includes a secondary BWP.

The principle and technical effect of the configuration apparatus for MBS resources in an NR cell provided in this embodiment are similar to those achieved by the above configuration method for MBS resources in an NR cell, and are not described herein again.

Fig. 11 is a schematic structure of an electronic device according to an embodiment of the present application, and as shown in fig. 11, the electronic device may include: at least oneprocessor 801 and amemory 802. Fig. 11 shows an electronic device as an example of a processor.

Thememory 802 stores programs. In particular, the program may include program code including computer operating instructions.

Memory 802 may comprise high-speed RAM memory and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

Theprocessor 801 is configured to execute computer-executable instructions stored by thememory 802 to implement the above form generation method;

theprocessor 801 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present Application.

Alternatively, in a specific implementation, if the communication interface, thememory 802 and theprocessor 801 are implemented independently, the communication interface, thememory 802 and theprocessor 801 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. Buses may be classified as address buses, data buses, control buses, etc., but do not represent only one bus or type of bus.

Alternatively, in a specific implementation, if the communication interface, thememory 802 and theprocessor 801 are integrated into a chip, the communication interface, thememory 802 and theprocessor 801 may complete communication through an internal interface.

An embodiment of the present application further provides a system for transmitting a broadcast service in an NR cell, where the system includes:

a base station, configured to select one BWP from divided BWPs for broadcast service transmission for any broadcast service transmitted in an NR cell, to transmit the broadcast service by a point-to-multipoint PTM bearer, and generate PTM configuration information of the broadcast service, and for a UE reporting a radio resource control RRC connected state interested in the broadcast service, if the UE cannot receive the broadcast service through an active DL BWP, the base station either reconfigures the active DL BWP of the UE, or establishes a PTP bearer for the UE, or configures a secondary PTM bearer for the UE, and accordingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and secondary PTM bearer configuration information of the broadcast service;

the base station is also used for sending PTM configuration information of the broadcast service in the NR cell through a single-cell multicast control channel SC-MCCH, and for reporting RRC connection state UE interested in the broadcast service, the base station transmits related information to the UE through a special signaling;

the UE is used for receiving the SC-MCCH or the special signaling and executing corresponding processing;

the base station is further configured to send the broadcast service by using a corresponding bearer;

the UE is further configured to receive the broadcast service through a corresponding bearer.

Optionally, the base station is specifically configured to, for the RRC connected UE that reports an interest to the broadcast service, send, by using a dedicated signaling, PTM configuration information of the broadcast service to the UE if the UE can receive the broadcast service through an activated DL BWP;

or, if the DL BWP of the UE is reconfigured to receive the broadcast service transmitted by the PTM bearer, sending the PTM configuration information of the broadcast service and the corresponding DL BWP reconfiguration information to the UE through a dedicated signaling;

or, if the base station establishes the PTP bearer on the activated DL BWP of the UE to transmit the broadcast service to the UE, transmitting PTP bearer configuration information to the UE through a dedicated signaling;

or, if the base station transmits the broadcast service to the UE through PTP bearer on the reconfigured activated DL BWP, transmitting PTP bearer configuration information and DL BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the broadcast service, for each secondary PTM bearer, for a UE that receives the broadcast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active DL BWP of the UE, transmitting configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on the active BWP of the UE, transmitting the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling by the base station.

Optionally, the UE is specifically configured to receive, when the UE is an RRC idle state/RRC inactive state UE, a corresponding system message to obtain configuration information of the SC-MCCH, receive the corresponding SC-MCCH, obtain PTM configuration information of the broadcast service from the SC-MCCH, establish a corresponding PTM bearer according to the PTM configuration information of the broadcast service, and receive the broadcast service;

when the UE is the RRC connection state UE which is interested in the broadcast service, if the special signaling only comprises the PTM configuration information of the broadcast service, establishing a corresponding PTM bearer according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTM configuration information of the broadcast service and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, where the UE receives an existing service on the reconfigured active DL BWP, and establishes a corresponding PTM bearer on the reconfigured active DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information, establishing, on an activated DL BWP, a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information, and receiving the broadcast service through the PTP bearer.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, receiving an existing service on the reconfigured active DL BWP, establishing a PTP bearer for receiving the broadcast service on the reconfigured active DL BWP according to the PTP bearer configuration information, and receiving the broadcast service through the PTP bearer.

Or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service, establishing a corresponding secondary PTM bearer on an activated DL BWP according to the secondary PTM configuration information, for receiving the broadcast service.

Or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes secondary PTM configuration information of the broadcast service and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, receiving an existing service on the reconfigured active DL BWP, and establishing a corresponding secondary PTM bearer on the reconfigured active DL BWP according to the secondary PTM bearer configuration information for receiving the broadcast service.

Optionally, the base station is specifically configured to send the broadcast service through a PTM bearer on a corresponding DL BWP according to the PTM configuration information of the broadcast service

Or, for the UE receiving the broadcast service through PTP bearer, sending the broadcast service through PTP bearer on a corresponding DL BWP according to configuration information of PTP bearer configured for the UE;

or, when the base station configures the secondary PTM bearer, sending the broadcast service through the secondary PTM bearer on the corresponding DL BWP according to the configuration information of each secondary PTM bearer;

optionally, the UE is specifically configured to receive the broadcast service through a PTM bearer for an RRC idle state/RRC inactive state UE;

for RRC connected UE, when special signaling includes PTM configuration information of the broadcast service, receiving the broadcast service through PTM load;

or, for the RRC connected UE, when the dedicated signaling includes PTP bearer configuration information, receiving the broadcast service through PTP bearers;

or, for the RRC connected UE, when the secondary PTM bearer configuration information is included in the dedicated signaling, receiving the broadcast service through the secondary PTM bearer.

Optionally, the base station is further configured to send configuration information carried by each secondary PTM of the broadcast service through an SC-MCCH.

Optionally, the UE is further configured to:

reporting the information of the broadcast service of interest and the RF capability of the UE to the base station if the RRC connected UE interested in the broadcast service can not receive the broadcast service through the existing configured PTM bearer and the auxiliary PTM bearer;

and reporting the information of the broadcast service which is interested and the RF capability of the UE to the base station if the RRC idle state/RRC non-activated state UE which is interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer and the auxiliary PTM bearer.

An embodiment of the present application further provides a system for sending a multicast service in an NR cell, where the system includes:

a base station, configured to determine BWPs for transmitting multicast service for any NR cell, preferentially configure each BWP in the area M of the cell, and configure CORESET and search space on each BWP

The base station is further configured to determine, according to a first message from a core network, a multicast service to be transmitted, and determine, according to a UE list in the message, each NR cell that transmits the multicast service, where when at least one UE in one NR cell is located in the UE list, the cell needs to transmit the multicast service, and the first message is a request message for establishing the multicast service;

the base station is further configured to select BWP for transmitting the multicast service in each cell transmitting the multicast service, and generate related configuration information;

the base station is also used for sending the relevant configuration information to each UE receiving the multicast service through a special signaling;

the UE is used for receiving the special signaling sent by the base station and establishing a corresponding bearer for receiving the multicast service according to the special signaling;

the base station is further configured to send the multicast service through a corresponding bearer in an NR cell;

the UE is further configured to receive the multicast service through a corresponding bearer.

Optionally, the base station is specifically configured to

If the UE can receive the multicast service by activating DL BWP, the base station sends the PTM configuration information of the multicast service to the UE by a special signaling;

or, if the DL BWP of the UE is reconfigured to receive the multicast service transmitted by PTM bearer, the base station sends PTM configuration information of the multicast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the multicast service, for each secondary PTM bearer, for a UE that receives the multicast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active BWP of the UE, the base station transmits configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on an active DL BWP of the UE, the base station transmits the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

The embodiment of the application also provides a chip which comprises a processor and an interface. Wherein the interface is used for inputting and outputting data or instructions processed by the processor. The processor is configured to perform the methods provided in the above method embodiments. The chip can be applied to a resource configuration device.

The present application also provides a computer-readable storage medium, which may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, are specifically, the computer-readable storage medium stores program information, and the program information is used for the above method.

Embodiments of the present application also provide a program, which when executed by a processor is configured to perform the method provided by the above method embodiments.

Embodiments of the present application also provide a program product, such as a computer-readable storage medium, having stored therein instructions, which, when executed on a computer, cause the computer to perform the method provided by the above-mentioned method embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the invention are brought about in whole or in part when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (26)

1. A method for configuring MBS resources in an NR cell is characterized by comprising the following steps:

determining a frequency interval for broadcast service transmission including an initial bandwidth part BWP according to an expected bandwidth for broadcast service transmission;

dividing the frequency interval into one or more BWPs, and configuring a control resource set CORESET and a search space on each divided BWP, wherein the CORESET and the search space are used for sending scheduling information of broadcast services transmitted on the corresponding BWP;

determining a frequency range for configuring active/inactive DL BWPs (downlink/uplink) aiming at each radio frequency RF (radio frequency) grade, wherein when the active/inactive DL BWPs configured for User Equipment (UE) are positioned in the frequency range corresponding to the RF grade of the UE and contain the frequency interval for transmitting the broadcast service, the UE can receive any broadcast service while receiving unicast service;

in order to ensure that the UE receives the broadcast service while receiving the unicast service, configuring frequency resources for the multicast service in an area outside a frequency range corresponding to a maximum RF level, or respectively setting reserved areas on the left side and the right side of the frequency range corresponding to the maximum RF level, and configuring the frequency resources for the multicast service in the frequency range corresponding to the maximum RF level and the area outside the reserved areas;

when the bandwidth corresponding to the frequency interval for transmitting the broadcast service is greater than the maximum bandwidth supported by the UE with the smallest radio frequency class, under the condition that the frequency interval is ensured to contain the initial BWP, compressing the frequency interval until the bandwidth corresponding to the frequency interval is not greater than the maximum bandwidth supported by the UE with the smallest radio frequency class, and simultaneously configuring one or more secondary BWPs in the carrier frequency bandwidth for transmitting the broadcast service, and broadcasting configuration information of each secondary BWP on the initial BWP;

for each secondary BWP, in order to enable the UE to receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, determining, for each RF class, a frequency range for configuring an active/inactive DL BWP, and when the active BWP configured for the UE is located within the frequency range corresponding to the RF class of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

2. The method of claim 1, wherein determining the frequency interval for the broadcast service transmission according to the expected bandwidth for the broadcast service transmission comprises:

bandwidth intended for broadcast traffic transmission;

determining a bandwidth actually available for broadcast service transmission on the entire initial BWP on the premise that the initial BWP is used for transmitting broadcast service;

a frequency interval for broadcast service transmission within a cell is determined.

3. The method according to claim 1 or 2, wherein configuring CORESET and search space on each partitioned BWP comprises:

uniformly configuring one group or a plurality of groups of CORESET and search spaces for each divided BWP in the initial BWP, wherein each group of CORESET and search space consists of one CORESET and a common search space configured on the CORESET;

alternatively, the CORESET and the search space are configured for each divided BWP separately.

4. A method for sending broadcast service in an NR cell is applied to a communication system, wherein the communication system comprises a base station and a UE, and the method comprises the following steps:

for any broadcast service transmitted in an NR cell, a base station selects one BWP from divided BWPs for broadcast service transmission to transmit the broadcast service by point-to-multipoint PTM bearer, and generates PTM configuration information of the broadcast service, for UE reporting a Radio Resource Control (RRC) connection state interested in the broadcast service, if the UE cannot receive the broadcast service through an activated DL BWP, the base station reconfigures the activated DL BWP of the UE, or establishes a PTP bearer for the UE, or configures an auxiliary PTM bearer for the UE, and correspondingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and auxiliary PTM bearer configuration information of the broadcast service;

the base station sends PTM configuration information of the broadcast service in an NR cell through a single-cell multicast control channel SC-MCCH, and for RRC connected-state UE which reports interest to the broadcast service, the base station transmits related information to the UE through a special signaling;

the UE receives the SC-MCCH or the special signaling and executes corresponding processing;

the base station adopts corresponding load to send the broadcast service;

and the UE receives the broadcast service through a corresponding bearer.

5. The method of claim 4, wherein for the RRC connected state UE interested in reporting the broadcast service, the base station transmits the related information to the UE through dedicated signaling, and the method comprises:

if the UE can receive the broadcast service through the activated DL BWP, the base station sends the PTM configuration information of the broadcast service to the UE through a special signaling;

or, if the DL BWP activated by the UE is reconfigured to receive the broadcast service transmitted by PTM bearer, the base station sends PTM configuration information of the broadcast service and corresponding DL BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station establishes PTP bearer on the activated DL BWP of the UE to transmit the broadcast service to the UE, the base station transmits PTP bearer configuration information to the UE through a dedicated signaling;

or, if the base station transmits the broadcast service to the UE through PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and DL BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the broadcast service, for each secondary PTM bearer, for a UE that receives the broadcast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active DL BWP of the UE, the base station transmits configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on the active BWP of the UE, the base station transmits the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

6. The method of claim 4, wherein the UE receives the SC-MCCH or the dedicated signaling and performs corresponding processing, comprising:

when the UE is an RRC idle state/RRC non-activated state UE, the UE receives a corresponding system message to obtain the configuration information of the SC-MCCH, receives the corresponding SC-MCCH, obtains the PTM configuration information of the broadcast service from the SC-MCCH, and establishes a corresponding PTM bearer according to the PTM configuration information of the broadcast service for receiving the broadcast service;

when the UE is the RRC connection state UE which is interested in the broadcast service, if the special signaling only comprises the PTM configuration information of the broadcast service, the UE establishes a corresponding PTM bearer according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes PTM configuration information of the broadcast service and DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, the UE receives an existing service on the reconfigured active DL BWP, and establishes a corresponding PTM bearer on the reconfigured active DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information, the UE establishes, on an activated DL BWP, a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information, and receives the broadcast service through the PTP bearer;

or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information and DL BWP reconfiguration information, the UE reconfigures DL BWP according to the DL BWP reconfiguration information, receives an existing service on the reconfigured activated DL BWP, establishes PTP bearers for receiving the broadcast service on the reconfigured activated DL BWP according to the PTP bearer configuration information, and receives the broadcast service through the PTP bearers;

or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service, the UE establishes a corresponding secondary PTM bearer on an activated DL BWP according to the secondary PTM configuration information, for receiving the broadcast service;

or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service and the DL BWP reconfiguration information, the UE reconfigures the DL BWP according to the DL BWP reconfiguration information, receives the existing service on the reconfigured active DL BWP, and establishes a corresponding secondary PTM bearer on the reconfigured active DL BWP according to the secondary PTM bearer configuration information, for receiving the broadcast service.

7. The method of claim 4, wherein the base station transmits the broadcast service using a corresponding bearer, comprising:

the base station sends the broadcast service through PTM bearing on corresponding DL BWP according to the PTM configuration information of the broadcast service

Or, for the UE receiving the broadcast service through PTP bearer, the base station sends the broadcast service through PTP bearer on a corresponding DL BWP according to configuration information of PTP bearer configured for the UE;

or, when the base station configures the secondary PTM bearer, the base station transmits the broadcast service through the secondary PTM bearer on the corresponding DL BWP according to the configuration information of each secondary PTM bearer.

8. The method of claim 4, wherein the UE receives the broadcast service via a corresponding bearer, and wherein the method comprises:

for the RRC idle state/RRC inactive state UE, the UE receives the broadcast service through the PTM bearer;

for RRC connected UE, when the special signaling comprises PTM configuration information of the broadcast service, the UE receives the broadcast service through PTM bearing;

or, for the RRC connected UE, when the dedicated signaling includes PTP bearer configuration information, the UE receives the broadcast service through PTP bearers;

or, for the RRC connected UE, when the dedicated signaling includes the secondary PTM bearer configuration information, the UE receives the broadcast service through the secondary PTM bearer.

9. The method of claim 4, further comprising:

and the base station sends the configuration information carried by each auxiliary PTM of the broadcast service through SC-MCCH.

10. The method of claim 4, further comprising:

if the RRC connected UE interested in the broadcast service cannot receive the broadcast service through the existing configured PTM bearer or the auxiliary PTM bearer, the UE reports the information of the interested broadcast service and the RF capability of the UE to the base station;

and if the broadcast service cannot be received through the existing configured PTM bearer or the auxiliary PTM bearer, the UE reports the information of the broadcast service which is interested and the RF capability of the UE to the base station.

11. A method for sending multicast service in an NR cell is applied to a communication system, wherein the communication system comprises a base station and a UE, and the method comprises the following steps:

for any NR cell, the base station determines BWPs for transmitting multicast service, preferentially configures each BWP in the area M of the cell, and configures CORESET and a search space on each BWP

According to a first message from a core network, a base station determines a multicast service to be transmitted, and according to a UE list in the message, the base station determines each NR cell for transmitting the multicast service, when at least one UE in one NR cell is positioned in the UE list, the cell needs to transmit the multicast service, and the first message is a request message for establishing the multicast service;

the base station selects BWP for sending the multicast service in each cell transmitting the multicast service and generates related configuration information;

the base station sends the relevant configuration information to each UE receiving the multicast service through a special signaling;

the UE receives the special signaling sent by the base station, and establishes a corresponding bearer for receiving the multicast service according to the special signaling;

the base station sends the multicast service in the NR cell through a corresponding bearer;

and the UE receives the multicast service through the corresponding bearer.

12. The method of claim 11, wherein the base station sends the relevant configuration information to each UE receiving the multicast service through dedicated signaling, comprising:

if the UE can receive the multicast service by activating DL BWP, the base station sends the PTM configuration information of the multicast service to the UE by a special signaling;

or, if the DL BWP of the UE is reconfigured to receive the multicast service transmitted by PTM bearer, the base station sends PTM configuration information of the multicast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the multicast service, for each secondary PTM bearer, for a UE that receives the multicast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active BWP of the UE, the base station transmits configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on an active DL BWP of the UE, the base station transmits the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

13. A method of configuring active DL BWP and inactive DL BWP, comprising:

pre-configuring a plurality of common BWPs, wherein each common BWP corresponds to one service type or a plurality of service types;

the UE is preferentially configured with a general BWP or with a special BWP, each of which includes a frequency interval for transmitting a broadcast service or includes a secondary BWP.

14. An apparatus for configuring MBS resources in an NR cell, comprising:

a first determining module for determining a frequency interval for broadcast service transmission including an initial bandwidth part BWP according to an expected bandwidth for broadcast service transmission;

a dividing module, configured to divide the frequency interval into one or more BWPs, and configure a control resource set, CORESET, and a search space on each divided BWP, where the CORESET and the search space are used to send scheduling information of a broadcast service transmitted on a corresponding BWP;

a second determining module, configured to determine, for each radio frequency RF class, a frequency range for configuring an active/inactive DL BWP, where when the active/inactive DL BWP configured for a user equipment UE is located in the frequency range corresponding to the RF class of the UE and includes the frequency interval for transmitting a broadcast service, the UE may receive any one broadcast service while receiving a unicast service;

a third determining module, configured to configure, for ensuring that the UE receives a broadcast service while receiving a unicast service, a frequency resource for a multicast service in a region outside a frequency range corresponding to a maximum RF level, or set reserved regions on left and right sides of the frequency range corresponding to the maximum RF level, respectively, and configure a frequency resource for the multicast service in the frequency range corresponding to the maximum RF level and the region outside the reserved regions;

a compressing module, configured to, when a bandwidth corresponding to the frequency interval for transmitting the broadcast service is greater than a maximum bandwidth supported by a UE with a minimum radio frequency class, compress the frequency interval to a bandwidth corresponding to the frequency interval that is not greater than the maximum bandwidth supported by the UE with the minimum radio frequency class under a condition that the frequency interval is guaranteed to include the initial BWP, configure one or more secondary BWPs in a carrier frequency bandwidth for transmitting the broadcast service, and broadcast configuration information of each secondary BWP on the initial BWP;

a processing module, configured to, for each secondary BWP, determine, for each RF class, a frequency range for configuring an active/inactive DL BWP, so that the UE can receive broadcast traffic transmitted on the secondary BWP while receiving unicast traffic, where when the active BWP configured for the UE is located in the frequency range corresponding to the RF class of the UE and includes the secondary BWP, the UE may receive any one broadcast traffic on the secondary BWP while receiving unicast.

15. The apparatus of claim 14, wherein the first determining module is specifically configured to predict a bandwidth for broadcast service transmission; determining a bandwidth actually available for broadcast service transmission on the entire initial BWP on the premise that the initial BWP is used for transmitting broadcast service; a frequency interval for broadcast service transmission within a cell is determined.

16. The apparatus according to claim 14 or 15, wherein the partitioning module is specifically configured to uniformly configure one or more sets of CORESET and search space for each partitioned BWP within the initial BWP, where each set of CORESET and search space is composed of a CORESET and a common search space configured on the CORESET; alternatively, the CORESET and the search space are configured for each divided BWP separately.

17. A transmission system of a broadcast service in an NR cell, comprising:

a base station, configured to select one BWP from divided BWPs for broadcast service transmission for any broadcast service transmitted in an NR cell, to transmit the broadcast service by a point-to-multipoint PTM bearer, and generate PTM configuration information of the broadcast service, and for a UE reporting a radio resource control RRC connected state interested in the broadcast service, if the UE cannot receive the broadcast service through an active DL BWP, the base station either reconfigures the active DL BWP of the UE, or establishes a PTP bearer for the UE, or configures a secondary PTM bearer for the UE, and accordingly, the base station generates BWP reconfiguration information, PTP bearer configuration information, and secondary PTM bearer configuration information of the broadcast service;

the base station is also used for sending PTM configuration information of the broadcast service in the NR cell through a single-cell multicast control channel SC-MCCH, and for reporting RRC connection state UE interested in the broadcast service, the base station transmits related information to the UE through a special signaling;

the UE is used for receiving the SC-MCCH or the special signaling and executing corresponding processing;

the base station is further configured to send the broadcast service by using a corresponding bearer;

the UE is further configured to receive the broadcast service through a corresponding bearer.

18. The system according to claim 17, wherein the base station is specifically configured to, for a UE in an RRC connected state that reports an interest in the broadcast service, send, by dedicated signaling, PTM configuration information of the broadcast service to the UE if the UE can receive the broadcast service through an active DL BWP;

or, if the DL BWP of the UE is reconfigured to receive the broadcast service transmitted by the PTM bearer, sending the PTM configuration information of the broadcast service and the corresponding DL BWP reconfiguration information to the UE through a dedicated signaling;

or, if the base station establishes the PTP bearer on the activated DL BWP of the UE to transmit the broadcast service to the UE, transmitting PTP bearer configuration information to the UE through a dedicated signaling;

or, if the base station transmits the broadcast service to the UE through PTP bearer on the reconfigured activated DL BWP, transmitting PTP bearer configuration information and DL BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the broadcast service, for each secondary PTM bearer, for a UE that receives the broadcast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active DL BWP of the UE, transmitting configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on the active BWP of the UE, transmitting the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling by the base station.

19. The system according to claim 17, wherein the UE is specifically configured to receive a corresponding system message to obtain the configuration information of the SC-MCCH when the UE is an RRC idle/RRC inactive UE, receive the corresponding SC-MCCH, obtain PTM configuration information of the broadcast service from the SC-MCCH, and establish a corresponding PTM bearer according to the PTM configuration information of the broadcast service, for receiving the broadcast service;

when the UE is the RRC connection state UE which is interested in the broadcast service, if the special signaling only comprises the PTM configuration information of the broadcast service, establishing a corresponding PTM bearer according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes PTM configuration information of the broadcast service and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, where the UE receives an existing service on the reconfigured active DL BWP and establishes a corresponding PTM bearer on the reconfigured active DL BWP according to the PTM configuration information of the broadcast service for receiving the broadcast service;

or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information, establishing, on an activated DL BWP, a PTP bearer for receiving the broadcast service according to the PTP bearer configuration information, and receiving the broadcast service through the PTP bearer;

or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes PTP bearer configuration information and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, receiving an existing service on the reconfigured activated DL BWP, establishing a PTP bearer for receiving the broadcast service on the reconfigured activated DL BWP according to the PTP bearer configuration information, and receiving the broadcast service through the PTP bearer;

or, when the UE is an RRC connected UE that is interested in the broadcast service, if the dedicated signaling includes the secondary PTM configuration information of the broadcast service, establishing a corresponding secondary PTM bearer on an activated DL BWP according to the secondary PTM configuration information, for receiving the broadcast service;

or, when the UE is an RRC connected UE that reports an interest to the broadcast service, if the dedicated signaling includes secondary PTM configuration information of the broadcast service and DL BWP reconfiguration information, reconfiguring a DL BWP according to the DL BWP reconfiguration information, receiving an existing service on the reconfigured active DL BWP, and establishing a corresponding secondary PTM bearer on the reconfigured active DL BWP according to the secondary PTM bearer configuration information for receiving the broadcast service.

20. The system according to claim 17, wherein said base station is specifically configured to transmit said broadcast service over a PTM bearer on a corresponding DL BWP in accordance with PTM configuration information of said broadcast service;

or, for the UE receiving the broadcast service through PTP bearer, sending the broadcast service through PTP bearer on a corresponding DL BWP according to configuration information of PTP bearer configured for the UE;

or, when the base station configures the secondary PTM bearer, transmitting the broadcast service through the secondary PTM bearer on the corresponding DL BWP according to the configuration information of each secondary PTM bearer.

21. The system according to claim 17, wherein the UE, in particular for RRC idle/RRC inactive UEs, is configured to receive the broadcast service via a PTM bearer;

for RRC connected UE, when special signaling includes PTM configuration information of the broadcast service, receiving the broadcast service through PTM load;

or, for the RRC connected UE, when the dedicated signaling includes PTP bearer configuration information, receiving the broadcast service through PTP bearers;

or, for the RRC connected UE, when the secondary PTM bearer configuration information is included in the dedicated signaling, receiving the broadcast service through the secondary PTM bearer.

22. The system of claim 17, wherein the base station is further configured to send configuration information of each secondary PTM bearer of the broadcast service via an SC-MCCH.

23. The system of claim 17, wherein the UE is further configured to:

reporting the information of the broadcast service of interest and the RF capability of the UE to the base station if the RRC connected UE interested in the broadcast service can not receive the broadcast service through the existing configured PTM bearer and the auxiliary PTM bearer;

and reporting the information of the broadcast service interested by the UE and the RF capability of the UE to the base station by the UE if the RRC idle state/RRC non-activated state UE interested by the broadcast service cannot receive the broadcast service through the existing configured PTM bearer or the auxiliary PTM bearer.

24. A transmission system of a multicast service in an NR cell, the system comprising:

a base station, configured to determine BWPs for transmitting multicast service for any NR cell, preferentially configure each BWP in the area M of the cell, and configure CORESET and search space on each BWP

The base station is further configured to determine, according to a first message from a core network, a multicast service to be transmitted, and determine, according to a UE list in the message, each NR cell that transmits the multicast service, where when at least one UE in one NR cell is located in the UE list, the cell needs to transmit the multicast service, and the first message is a request message for establishing the multicast service;

the base station is further configured to select BWP for transmitting the multicast service in each cell transmitting the multicast service, and generate related configuration information;

the base station is also used for sending the relevant configuration information to each UE receiving the multicast service through a special signaling;

the UE is used for receiving the special signaling sent by the base station and establishing a corresponding bearer for receiving the multicast service according to the special signaling;

the base station is further configured to send the multicast service through a corresponding bearer in an NR cell;

the UE is further configured to receive the multicast service through a corresponding bearer.

25. System according to claim 24, wherein the base station is specifically configured for

If the UE can receive the multicast service by activating DL BWP, the base station sends the PTM configuration information of the multicast service to the UE by a special signaling;

or, if the DL BWP of the UE is reconfigured to receive the multicast service transmitted by PTM bearer, the base station sends PTM configuration information of the multicast service and corresponding BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the activated DL BWP of the UE, the base station transmits PTP bearer configuration information to the UE through dedicated signaling;

or, if the base station transmits the multicast service to the UE through PTP bearer on the reconfigured activated DL BWP, the base station transmits PTP bearer configuration information and BWP reconfiguration information to the UE through dedicated signaling;

or, if the base station configures one or more secondary PTM bearers for transmitting the multicast service, for each secondary PTM bearer, for a UE that receives the multicast service using the secondary PTM bearer, if the secondary PTM bearer is located on an active BWP of the UE, the base station transmits configuration information of the secondary PTM bearer to the UE through dedicated signaling, and if the secondary PTM bearer is not located on an active DL BWP of the UE, the base station transmits the configuration information of the secondary PTM bearer and DL BWP reconfiguration information to the UE through dedicated signaling.

26. An apparatus for configuring active BWP and inactive BWP, comprising:

a configuration module, configured to pre-configure a plurality of common BWPs, where each common BWP corresponds to one service type or multiple service types;

an allocation module, configured to preferentially configure a general BWP for the UE or preferentially configure a special BWP for the UE, where each special BWP includes a frequency interval for transmitting a broadcast service or includes a secondary BWP.

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