Summary of the invention
In view of this, the technical problem that the invention solves the problems that is to provide the control signaling method of a kind of extensive antenna system, and each user terminal group is only sent a G-PDCCH signaling.
A kind of control signaling method of extensive antenna system, including: the user terminal being active is divided into one or more user terminal group and group number is set；User terminal in each user terminal group is numbered；When sending control signaling, each user terminal group is sent a group Physical Downlink Control Channel G-PDCCH signaling；Wherein, described G-PDCCH signaling includes: the instruction of user terminal packet index, scheduling of user terminals and scheduling of user terminals information.
According to one embodiment of present invention, further, the numerical intervals of multiple-input and multiple-output Cell Radio Network Temporary Identifier/Identity, Cell-RNTI MIMO-C-RNTI is set；Described G-PDCCH signaling is by described MIMO-C-RNTI scrambling.
According to one embodiment of present invention, further, when judging to meet transmission PDCCH signaling rule, then physical downlink control channel PDCCH signaling is sent to user terminal；Wherein, meet described in and send PDCCH signaling rule and include: data needs that the quantity of the user terminal being active exceedes default flow threshold less than the data traffic of default amount threshold, user terminal, user terminal sends repeat transmission.
According to one embodiment of present invention, further, the numerical intervals of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI is set；Described PDCCH signaling is by described C-RNTI scrambling.
According to one embodiment of present invention, further, when user terminal receives control instruction, detect that the control signaling received is described G-PDCCH signaling or described G-PDCCH signaling based on described MIMO-C-RNTI and described C-RNTI.
According to one embodiment of present invention, further, when user terminal detects that the control signaling received is described G-PDCCH signaling, according to the user terminal packet index obtained from described G-PDCCH signaling and scheduling of user terminals instruction, it may be judged whether be scheduled；If it is, the numbering according to user terminal obtains described scheduling of user terminals information from described G-PDCCH signaling；Wherein, described scheduling of user terminals information includes: resource allocation information, MCS, DM-RS information, HARQ information.
According to one embodiment of present invention, further, when user terminal detects that the control signaling received is described PDCCH signaling, from described PDCCH signaling, schedule information is obtained.
The technical problem that the invention solves the problems that is to provide a kind of base station, only sends a G-PDCCH signaling for each user terminal group.
A kind of base station, including: end packet unit, for the user terminal being active being divided into one or more user terminal group and arranging group number；User terminal in each user terminal group is numbered；Control signaling transmitting element, for when sending control signaling, each user terminal group being sent a group Physical Downlink Control Channel G-PDCCH signaling；Wherein, described G-PDCCH signaling includes: the instruction of user terminal packet index, scheduling of user terminals and scheduling of user terminals information.
According to one embodiment of present invention, further, scrambling unit, for arranging the numerical intervals of multiple-input and multiple-output Cell Radio Network Temporary Identifier/Identity, Cell-RNTI MIMO-C-RNTI；Described G-PDCCH signaling is by described MIMO-C-RNTI scrambling.
According to one embodiment of present invention, further, described control signaling transmitting element, it is additionally operable to, when judging to meet transmission PDCCH signaling rule, send physical downlink control channel PDCCH signaling to user terminal；Wherein, meet described in and send PDCCH signaling rule and include: data needs that the quantity of the user terminal being active exceedes default flow threshold less than the data traffic of default amount threshold, user terminal, user terminal sends repeat transmission.
According to one embodiment of present invention, further, described scrambling unit, for arranging the numerical intervals of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI；Described PDCCH signaling is by described C-RNTI scrambling.
The technical problem that the invention solves the problems that is to provide a kind of terminal, it is possible to receive G-PDCCH signaling.
A kind of terminal, including: signaling detection unit, for detecting whether the control signaling received is G-PDCCH signaling；Schedule information acquiring unit, for when detecting that the control signaling received is described G-PDCCH signaling, according to obtaining user terminal packet index and scheduling of user terminals instruction from described G-PDCCH signaling, it may be judged whether be scheduled；If it is, the numbering according to user terminal obtains described scheduling of user terminals information from described G-PDCCH signaling；Wherein, described scheduling of user terminals information includes: resource allocation information, MCS, DM-RS information, HARQ information.
According to one embodiment of present invention, further, described signaling detection unit, for detecting whether the control signaling received is PDCCH signaling；Described schedule information acquiring unit, for when detecting that the control signaling received is described PDCCH signaling, obtaining schedule information from described PDCCH signaling.
According to one embodiment of present invention, further, based on MIMO-C-RNTI and C-RNTI, described signaling detection unit, for detecting that the control signaling received is described G-PDCCH signaling or described G-PDCCH signaling.
A kind of communication system, including: base station, terminal as above.
The control signaling method of the extensive antenna system of the present invention, base station, terminal and system, it is possible to significantly reduce the expense controlling signaling, reduce the consumption of resource, improve the utilization rate of resource.
Detailed description of the invention
With reference to the accompanying drawings the present invention is described more fully, the exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.Below in conjunction with each figure and embodiment, technical scheme is carried out many-sided description.
Extensive antenna system is extensive MIMO, is referred to as massiveMIMO or large-scaleMIMO system.Adopt existing PDCCH to need substantial amounts of control signaling consumption, affect resource utilization.In current LTE system, PDCCH has different forms, and the format2B as distributed for downlink resource is as shown in table 1 below:
| Field | Bit(s) |
| Resource allocation header | 1 (0for BW≤10PRBs) |
| Resource block assignment | Ceiling(NRB/P) |
| TPC command for PUCCH | 2 |
| Downlink Assignment Index | 2(For TDD only) |
| HARQ process number | 3bits(FDD),4bits(TDD) |
| TB1MCS | 5 |
| TB1NDI | 1 |
| TB1RV | 2 |
| TB2MCS | 5 |
| TB2NDI | 1 |
| TB2RV | 2 |
| DM-RS ports and SCID | 3 |
Table 1-is for the format2B table of downlink resource distribution
Fig. 1 is the flow chart of the embodiment controlling signaling method of the extensive antenna system according to the present invention, as shown in Figure 1:
Step 101, is divided into the user terminal being active one or more user terminal group and arranges group number.
Step 102, numbers the user terminal in each user terminal group.
Step 103, when sending control signaling, sends a group Physical Downlink Control Channel G-PDCCH signaling to each user terminal group.
G-PDCCH signaling includes: the information such as the instruction of user terminal packet index, scheduling of user terminals and scheduling of user terminals information.
The control signaling method of the extensive antenna system in above-described embodiment, sends a G-PDCCH signaling to each user terminal group, it is possible to reduce the expense controlling signaling, improves the utilization rate of resource.
PDCCH carries scheduling and other controls signaling, specifically comprises transformat, resource distribution, uplink scheduling license, power control and uplink retransmission information.PDCCH channel is the set of one group of physical resource particle, it carries up-downgoing and controls information, different according to its action scope, PDCCH carries data separation common control information and dedicated control information, the PDCCH information of the different terminals RNTI data separation by its correspondence, namely the crc of its DCI is by RNTI scrambling.
In extensive antenna system, the numerical intervals of multiple-input and multiple-output Cell Radio Network Temporary Identifier/Identity, Cell-RNTI MIMO-C-RNTI is set, and G-PDCCH signaling is by MIMO-C-RNTI scrambling.
As in figure 2 it is shown, user terminal is divided into several groups and numbers, for instance for Group1 ..., n ... N.User terminal in each group is numbered, such as, is UE1 ... k ... K.Base station send control signaling PDCCH time, each group only sends PDCCH, i.e. a G-PDCCH signaling.This G-PDCCH signaling indicates which user in which group, group to be scheduled.
As it is shown on figure 3, definition MIMO-C-RNTI, G-PDCCH are by MIMO-C-RNTI scrambling.MIMO-C-RNTI is group Cell Radio Network Temporary Identifier/Identity, Cell-RNTI.By MIMO-C-RNTI scrambling, user terminal intercepts PDCCH, by checking MIMO-C-RNTI identification G-PDCCH, and reads user terminal packet index and the scheduling of user terminals instruction of G-PDCCH, obtains the schedule information of oneself.
The PDCCH information of the different terminals RNTI data separation by its correspondence, the crc of PDSCH channel control information DCI is by C-RNTI scrambling.C-RNTI is Cell Radio Network Temporary Identifier/Identity, Cell-RNTI.The G-PDCCH information of different grouping carries out data separation by the MIMO-C-RNTI of its correspondence, and the crc of DCI is by MIMO-C-RNTI scrambling.
In one embodiment, the basic structure of G-PDCCH is as shown in table 2 below: include resource distribution classification, resource allocation information, user terminal packet index, scheduling of user terminals instruction, scheduling of user terminals information (HARQ process number, MCS, DM-RS information etc.).
The basic structure table of table 2-G-PDCCH
When judging to meet transmission PDCCH signaling rule, then send physical downlink control channel PDCCH signaling to user terminal.Arranging the numerical intervals of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI, PDCCH signaling is by C-RNTI scrambling.Meet and send PDCCH signaling rule and include: the data needs that the quantity of the user terminal being active exceedes default flow threshold less than the data traffic of default amount threshold, user terminal, user terminal sends repeat transmission etc..
Base station is optional sends PDCCH or G-PDCCH, and basic norm can be: adopt PDCCH when number of users in scheduling is less, if number of users is less than the group number of packet.Otherwise, adopt G-PDCCH.PDCCH (this situation seldom occurs in MassiveMIMO) is adopted when the data stream that certain user sends is more.Otherwise adopt G-PDCCH.When the data that user sends need to retransmit, adopt PDCCH etc..
In one embodiment, the transmission of G-PDCCH is triggered by high-level signaling in base station, and the packet index of user attaching and the numbering in certain packet are notified user.Base station determines to adopt PDCCH or G-PDCCH according to criterion.When user terminal receives control instruction, detect that based on MIMO-C-RNTI and C-RNTI the control signaling received is G-PDCCH signaling or G-PDCCH signaling.
When user terminal detects that the control signaling received is G-PDCCH signaling, according to the user terminal packet index obtained from G-PDCCH signaling and scheduling of user terminals instruction, it may be judged whether be scheduled.If it is, the numbering according to user terminal obtains scheduling of user terminals information from G-PDCCH signaling.Scheduling of user terminals information includes: resource allocation information, MCS, DM-RS information, HARQ information etc..When user terminal detects that the control signaling received is PDCCH signaling, from PDCCH signaling, obtain schedule information.
User terminal judges whether to receive the high-level signaling triggering G-PDCCH, if received, user terminal is attempted with C-RNTI and MIMO-C-RNTI, PDCCH and G-PDCCH being detected respectively.After user terminal listens to G-PDCCH, read packet index, and read corresponding position in G-PDCCH according to oneself numbering in a packet, judge that whether oneself is scheduled, and read corresponding schedule information, such as resource allocation information, MCS, DM-RS information, HARQ information etc..Without receiving, PDCCH is detected by user terminal C-RNTI.
In one embodiment, it is assumed that have 100 user terminals in extensive antenna (256 antenna) system, wherein 20 are activated user terminal, and the user terminal simultaneously dispatched is 10.According to existing PDCCH, it is necessary to sending 1 PDCCH, i.e. 10 PDCCH for each user terminal, signaling consumption is approximately 13%.
Adopt G-PDCCH, 20 user terminals are divided into 4 groups, often 5 user terminals of group.If the user terminal in scheduling is distributed in 2 groups, now only needing 2 G-PDCCH, signaling consumption is approximately 2.6%, compares with existing PDCCH, and expense declines about 10.4%.If the user terminal in scheduling is distributed in 3 groups, now only needing 3 G-PDCCH, signaling consumption is approximately 3.9%, compares with existing PDCCH, and expense declines about 9.1%.If the user terminal in scheduling is distributed in 3 groups, now only needing 3 G-PDCCH, signaling consumption is approximately 5.2%, compares with existing PDCCH, and expense declines about 7.8%.Adopt G-PDCCH can significantly reduce the expense controlling signaling.
As shown in Figure 4, the present invention provides a kind of base station 21.The user terminal being active is divided into one or more user terminal group and arranges group number by end packet unit 221.User terminal in each user terminal group is numbered.Control signaling transmitting element 212 when sending control signaling, each user terminal group is sent a group Physical Downlink Control Channel G-PDCCH signaling.
G-PDCCH signaling includes: the instruction of user terminal packet index, scheduling of user terminals and scheduling of user terminals information etc..Scrambling unit 213 arranges the numerical intervals of multiple-input and multiple-output Cell Radio Network Temporary Identifier/Identity, Cell-RNTI MIMO-C-RNTI.G-PDCCH signaling is by MIMO-C-RNTI scrambling.
When judging to meet transmission PDCCH signaling rule, control signaling transmitting element 212 and send physical downlink control channel PDCCH signaling to user terminal.Meet and send PDCCH signaling rule and include: the data needs that the quantity of the user terminal being active exceedes default flow threshold less than the data traffic of default amount threshold, user terminal, user terminal sends repeat transmission etc..Scrambling unit 213 arranges the numerical intervals of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI.PDCCH signaling is by C-RNTI scrambling.
As it is shown in figure 5, the present invention provides a kind of terminal 31.Whether the control signaling that signaling detection unit 311 detection receives is G-PDCCH signaling.When detecting that the control signaling received is G-PDCCH signaling, schedule information acquiring unit 312 is according to obtaining user terminal packet index and scheduling of user terminals instruction from G-PDCCH signaling, it may be judged whether be scheduled.
If it is, schedule information acquiring unit 312 obtains scheduling of user terminals information according to the numbering of user terminal from G-PDCCH signaling.Scheduling of user terminals information includes: resource allocation information, MCS, DM-RS information, HARQ information.
Whether the control signaling that signaling detection unit 311 detection receives is PDCCH signaling.When detecting that the control signaling received is PDCCH signaling, schedule information acquiring unit 312 obtains schedule information from PDCCH signaling.Signaling detection unit 311 detects that based on MIMO-C-RNTI and C-RNTI the control signaling received is G-PDCCH signaling or G-PDCCH signaling.
The present invention provides a kind of communication system, including: base station as above, user terminal.
The control signaling method of extensive antenna system, base station, terminal and the system that above-described embodiment provides, it is possible to significantly reduce the expense controlling signaling, reduces the consumption of resource, improves the utilization rate of resource.
It is likely to be achieved in many ways the method and system of the present invention.Such as, can by software, hardware, firmware or software, hardware, firmware any combination realize the method and system of the present invention.For the said sequence of step of method merely to illustrate, the step of the method for the present invention is not limited to order described in detail above, unless specifically stated otherwise.Additionally, in certain embodiments, can being also record program in the recording medium by the invention process, these programs include the machine readable instructions for realizing the method according to the invention.Thus, the present invention also covers the record medium of the storage program for performing the method according to the invention.