CN108632970B - Power control method, terminal and network equipment - Google Patents

Abstract

Translated fromChinese

本申请提供了一种功率控制方法、终端和网络设备，该功率控制方法包括：终端接收至少一个网络设备发送的至少一个下行控制信息(DCI)，该至少一个DCI包括至少两个发射功率控制命令；该终端根据该至少两个发射功率控制命令，确定同一载波内的上行信道发射功率。本申请实施例的功率控制方法，终端能够根据多个发射功率控制命令确定上行信道发射功率，从而能够保证高效合理的功率分配，提高系统整体性能。

The present application provides a power control method, a terminal, and a network device. The power control method includes: the terminal receives at least one downlink control information (DCI) sent by at least one network device, where the at least one DCI includes at least two transmit power control commands ; the terminal determines the uplink channel transmit power in the same carrier according to the at least two transmit power control commands. In the power control method of the embodiment of the present application, the terminal can determine the transmit power of the uplink channel according to multiple transmit power control commands, thereby ensuring efficient and reasonable power allocation and improving the overall performance of the system.

Description

Power control method, terminal and network equipment

Technical Field

The present application relates to the field of communications, and more particularly, to a power control method, a terminal and a network device.

Background

In a new radio access technology (NR) system, coordinated multiple point (CoMP) transmission has been widely studied as a key technology capable of improving the performance of edge cell terminals. In a CoMP scenario, data may be sent to a base station of a serving cell and a base station of a cooperating cell through uplink channels, or Uplink Control Information (UCI) may be reported. The UCI may be information such as Channel State Information (CSI), Acknowledgement (ACK), Negative Acknowledgement (NACK), and the like.

For example, in an NR system, in order to avoid a delay problem of CSI interaction between a serving cell and a cooperating cell due to a non-ideal backhaul link, a method of reporting CSI using an air interface may be considered. That is, the terminal feeds back the CSI1 between the terminal and the base station of the serving cell and the CSI2 between the terminal and the base station of the cooperating cell to the base station of the serving cell and the base station of the cooperating cell respectively through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). When reporting, the terminal may report a PUCCH or a PUSCH with a certain transmission power, where the PUCCH or the PUSCH includes CSI1 of the base station of the serving cell and CSI2 of the base station of the cooperating cell. It is also possible for the terminal to report one PUCCH or PUSCH per base station with a certain transmit power.

Therefore, no matter what method is adopted by the terminal for reporting, uplink power control is required. When a terminal reports UCI or sends uplink data through an uplink channel, how to control the transmission power of the uplink channel becomes a problem which needs to be solved urgently.

Disclosure of Invention

The application provides a power control method, a terminal and a network device, which can determine the transmitting power of an uplink channel according to a plurality of transmitting power control commands, thereby ensuring efficient and reasonable power distribution and improving the overall performance of a system.

In a first aspect, a power control method is provided, including: a terminal receives at least one Downlink Control Information (DCI) sent by at least one network device, wherein the DCI comprises at least two transmission power control commands; and the terminal determines the uplink channel transmitting power in the same carrier according to the at least two transmitting power control commands.

Optionally, the uplink channel may be PUCCH and/or PUSCH.

Alternatively, the transmission power control command may be a tpc (transmission power control) command.

According to the power control method, the terminal can determine the uplink channel transmitting power according to the plurality of transmitting power control commands, so that efficient and reasonable power distribution can be guaranteed, and the overall performance of the system is improved.

In a possible implementation manner, the receiving, by the terminal, at least one downlink control information DCI sent by at least one network device includes: the terminal receives DCI sent by first network equipment, the DCI sent by the first network equipment comprises the at least two transmission power control commands of the terminal, and the first network equipment is any one of the at least one network equipment.

The transmission power control command can be a TPC command, so according to the embodiment of the present application, an existing TPC command for a terminal can be extended to multiple TPC commands for the terminal, and the actual requirements of the system are met.

In a possible implementation manner, the at least two transmission power control commands occupy n bits, n is a positive integer greater than 2, and a corresponding relationship between the n bits and the at least two transmission power control commands is configured or predefined by higher layer signaling.

Alternatively, the higher layer signaling may be Radio Resource Control (RRC) signaling or medium access control signaling (MAC CE) signaling.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power in the same carrier according to the at least two transmission power control commands includes: and the terminal determines the uplink channel transmitting power according to the adjusting step length or the absolute power adjusting value indicated by each transmitting power control command.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power in the same carrier according to the at least two transmission power control commands includes: the terminal determines a target transmission power control command in the at least two transmission power control commands; and the terminal determines the uplink channel transmitting power in the same carrier according to the target transmitting power control command.

Optionally, the determining, by the terminal, a target transmission power control command in the at least two transmission power control commands includes: and the terminal determines the target transmitting power control command according to at least one of the resource position, the aggregation level, the scrambling mode and the included first indication information of the at least one DCI.

Optionally, the terminal determines, as the target transmission power control command, a transmission power control command included in a DCI satisfying at least one of the following conditions in the at least one DCI:

the first indication information is carried in the target resource position, the aggregation level is a target aggregation level, the scrambling mode is a target scrambling mode, and the included first indication information is target first indication information.

Optionally, the determining, by the terminal, a target transmission power control command in the at least two transmission power control commands includes: the terminal determines a candidate DCI in the at least one DCI, wherein the candidate DCI is determined in a predefined mode or in an interactive mode among network devices;

and the terminal determines the transmission power control command included in the candidate DCI as the target transmission power control command.

Optionally, the determining, by the terminal, a candidate DCI in the at least one DCI includes: and the terminal determines the candidate DCI according to at least one of the resource positions, the aggregation level, the scrambling mode and the included first indication information where the plurality of DCIs are located.

Optionally, the determining, by the terminal, a candidate DCI in the at least one DCI includes: the terminal determines DCI satisfying at least one of the following conditions as the candidate DCI: the first indication information is carried in the target resource position, the aggregation level is a target aggregation level, the scrambling mode is a target scrambling mode, and the included first indication information is target first indication information.

Optionally, the candidate DCI is sent by a serving network device of the terminal.

Optionally, the resource location is any one of:

a search space, a set of control channel candidates, and a set of control resources.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power in the same carrier according to the at least two transmission power control commands includes: the terminal respectively determines at least two candidate transmitting powers according to the at least two transmitting power control commands, and the at least two candidate transmitting powers correspond to the at least two transmitting power control commands one to one; and the terminal determines the uplink channel transmitting power according to the at least two candidate transmitting powers.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power in the same carrier according to the at least two candidate transmission powers includes: the terminal determines the maximum transmission power, the minimum transmission power or the average value of the at least two candidate transmission powers as the uplink channel transmission power.

By determining the maximum transmitting power of the at least two candidate transmitting powers as the transmitting power of the uplink channel, the transmission stability of the uplink channel can be ensured. By determining the minimum transmitting power of the at least two candidate transmitting powers as the uplink channel transmitting power, the interference to other terminals of the cell can be reduced.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power in the same carrier according to the at least two candidate transmission powers includes: the terminal may determine the weighted sum of the at least two candidate transmit powers as the uplink channel transmit power.

Optionally, the weight value for each candidate transmit power may be calculated by the terminal, may also be configured by the network device, or may also be predefined, which is not specifically limited in this embodiment of the present application.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power in the same carrier according to the at least two transmission power control commands includes: and the terminal determines the uplink channel transmitting power according to a first transmitting power control command in the at least two transmitting power control commands.

In a second aspect, a power control method is provided, including: a terminal receives Downlink Control Information (DCI) sent by first network equipment, wherein the DCI comprises at least two transmission power control commands of the terminal; the terminal determines the uplink channel transmission power of each network device in at least two network devices according to the at least two transmission power control commands, the at least two network devices correspond to the at least two transmission power control commands one to one, and the at least two network devices include the first network device.

According to the power control method, the terminal can determine the uplink channel transmitting power according to the plurality of transmitting power control commands, so that efficient and reasonable power distribution can be guaranteed, and the overall performance of the system is improved.

In a possible implementation manner, the at least two transmission power control commands occupy n bits, n is a positive integer greater than 2, and a corresponding relationship between the n bits and the at least two transmission power control commands is configured or predefined by higher layer signaling.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power of each of the at least two network devices according to the at least two transmission power control commands includes: and the terminal determines the uplink channel transmitting power of each network device according to the adjusting step length or the absolute power adjusting value indicated by each transmitting power control command.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmit power of each network device according to the adjustment step size or the absolute power adjustment value indicated by each transmit power control command includes: and the terminal determines the uplink channel transmitting power of each network device according to the adjusting step length indicated by each transmitting power control command and the propagation loss corresponding to the uplink channel of each network device, or according to the absolute power adjusting value indicated by each transmitting power control command and the propagation loss corresponding to the uplink channel of each network device.

In a possible implementation manner, the propagation loss corresponding to the uplink channel of each network device is indicated by indication information or higher layer signaling in the DCI.

In a possible implementation manner, the determining, by the terminal, the uplink channel transmission power of each of the at least two network devices according to the at least two transmission power control commands includes:

the terminal determines the ith candidate transmitting power P in at least two candidate transmitting powers according to the ith transmitting power control command in the at least two transmitting power control commands_1iThe at least two transmission power control commands are in one-to-one correspondence with the at least two candidate transmission powers, i is in [1, N ]]Is traversed and taken, i is a positive integer, N is the number of the at least two uplink channels, N is a positive integer greater than 1, P_1i＞0；

At P₁₁+P₁₂+…+P_1N≤P₀In case that the terminal determines that the transmission power of the uplink channel of the ith network device of the at least two network devices is P_1i(ii) a Or

At P₁₁+P₁₂+…+P_1N＞P₀In case of (2), the terminal determines the transmission power P of the ith uplink channel according to any one of the following formulas_2i：

a₀*(P₁₁+P₁₂+…+P_1N)≤P₀And P is_2i＝a₀*P_1iOr

a₁*P₁₁+a₂*P₁₂+…+a_N*P_1N≤P₀And P is_2i＝a_i*P_1i

Wherein, P_2i＞0，P₀Is the maximum transmission power of the terminal, a₀And a_i0 < a as a scaling factor₀＜1，a_i≥0。

According to the method of the embodiment of the application, the terminal can ensure that the uplink transmission power is smaller than the maximum transmission power of the terminal in a power scaling mode according to the received multiple transmission power control commands.

In one possible implementation, the scaling factor a_iIs determined according to the priority of the uplink channel of the ith network device.

In a third aspect, a power control method is provided, including: the network equipment sends downlink control information DCI to a terminal, wherein the DCI comprises at least two transmission power control commands of the terminal, and the at least two transmission power control commands are used for the terminal to determine the transmission power of at least one uplink channel; and the network equipment receives a first uplink channel in the at least one uplink channel sent by the terminal.

In a possible implementation manner, the at least two transmission power control commands occupy n bits, n is a positive integer greater than 2, and a corresponding relationship between the n bits and the at least two transmission power control commands is configured or predefined by higher layer signaling.

In one possible implementation, the DCI further includes indication information indicating a propagation loss corresponding to each of the at least one uplink channel.

In a fourth aspect, a terminal is provided for performing the method of the first aspect or any possible implementation manner of the first aspect. In particular, the terminal comprises means for performing the method of the first aspect or any possible implementation manner of the first aspect.

In a fifth aspect, a terminal is provided for performing the method of the second aspect or any possible implementation manner of the second aspect. In particular, the terminal comprises means for performing the method of the second aspect or any possible implementation of the second aspect.

A sixth aspect provides a network device configured to perform the method of the third aspect or any possible implementation manner of the third aspect. In particular, the terminal comprises means for performing the method of the third aspect or any possible implementation manner of the third aspect.

In a seventh aspect, a terminal is provided, where the terminal includes a memory for storing a computer program and a processor for calling the computer program from the memory and executing the computer program, so that the system performs the method in the first aspect and any possible implementation manner of the first aspect.

In an eighth aspect, a terminal is provided, which includes a memory for storing a computer program and a processor for calling and running the computer program from the memory, so that the system executes the method in the second aspect and any possible implementation manner of the second aspect.

In a ninth aspect, a network device is provided, which comprises a memory for storing a computer program and a processor for calling and running the computer program from the memory, so that the system performs the method in any possible implementation manner of the third aspect and the third aspect.

A tenth aspect provides a computer-readable storage medium for storing a computer program comprising instructions for performing the method of the above aspects and any possible implementation of the above aspects.

In an eleventh aspect, a computer program product is provided comprising instructions which, when run on a computer, cause the computer to perform the above aspects and the method in any possible implementation of the above aspects.

Drawings

Fig. 1 is a schematic diagram of a system architecture for a power control method according to the present application.

Fig. 2 is a schematic flow diagram of a power control method according to the present application.

FIG. 3 is a schematic flow chart diagram illustrating one embodiment of a power control method according to the present application.

FIG. 4 is a schematic flow chart diagram illustrating another embodiment of a power control method according to the present application.

Fig. 5 is a schematic flow chart diagram of another power control method according to the present application.

Fig. 6 is a schematic block diagram of a terminal according to the present application.

Fig. 7 is a schematic block diagram of another terminal according to the present application.

Fig. 8 is a schematic block diagram of a network device according to the present application.

Fig. 9 is a schematic block diagram of a terminal according to the present application.

Fig. 10 is a schematic block diagram of another terminal according to the present application.

Fig. 11 is a schematic block diagram of a network device according to the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

It should be understood that the technical solution of the present application can be applied to various communication systems, for example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, an advanced long term evolution (LTE-a) system, a Universal Mobile Telecommunications System (UMTS), a 5G system (or NR system), and the like.

Fig. 1 illustrates awireless communication system 100 suitable for use with embodiments of the present application. Thewireless communication system 100 may include a plurality of network devices, such as thefirst network device 110 and thesecond network device 120 shown in fig. 1.First network device 110 andsecond network device 120 may each communicate withterminal 130 over a wireless air interface.First network device 110 andsecond network device 120 may provide communication coverage for a particular geographic area and may communicate with terminals located within the coverage area. Thefirst network device 110 or thesecond network device 120 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a base station (NodeB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a Transmission Reception Point (TRP), and the like, which is not particularly limited in this embodiment of the present invention.

In addition, the network device according to the embodiment of the present application may be a network device adopting a CU-DU architecture. The network device executing the method of the embodiment of the present application may be a central Control Unit (CU), or may be a Distributed Unit (DU), where a CU may also be referred to as a central unit or a control node.

Thewireless communication system 100 also includes one ormore terminals 130 located within the coverage area of thefirst network device 110 and thesecond network device 120. The terminal 130 may be mobile or stationary. A terminal 130, which may be referred to as a terminal device, an access terminal, a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment, may communicate with one or more core networks (core networks) via a Radio Access Network (RAN). The terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, etc.

Thewireless communication system 100 may support CoMP transmission, i.e., multiple cells or multiple transmission points may cooperate to transmit data to the same terminal within the same carrier and within the same time period. Wherein the plurality of cells may belong to the same network device or different network devices and may be selected according to channel gain or path loss, received signal strength, received signal order, etc.

The terminal 130 in thewireless communication system 100 may support multicast, that is, the terminal 130 may communicate with thefirst network device 110 and may also communicate with thesecond network device 120, where thefirst network device 110 may serve as a main network device or a main cell, and thesecond network device 120 may serve as a cooperative network device or a cooperative cell. Alternatively, thefirst network device 110 may act as a cooperating network device or cooperating cell and thesecond network device 120 may act as a primary network device or primary cell. The primary network device is a network device that provides services such as RRC connection, non-access stratum (NAS) mobility management, security input, and the like to the terminal through a wireless air interface protocol.

Taking the first network device as a main network device and the second network device as a cooperative network device as an example, the number of the second network devices may be one or more. It is to be appreciated that the first network device and the second network device can both be serving network devices.

Some general concepts or definitions referred to in the embodiments of the present application are explained below.

1) Search space (search space):

the search space may include: a common search space (common search space) and a UE-specific search space (UE-specific search space). The common search space is used for transmitting common information at a cell level, and may include, for example: control information related to paging (paging), Random Access Response (RAR), Broadcast Control Channel (BCCH), and the like; the UE-specific search space is used for transmitting terminal (or UE) level information, and may include, for example: downlink shared channel (DL-SCH), uplink shared channel (UL-SCH), and other related control information.

It should be understood that the common search space and the UE-specific search space are two types of search spaces defined in the LTE protocol, and the UE-specific search space is taken as an example in the present application, but this should not be construed as any limitation in the present application, and the present application does not exclude the possibility of repartitioning or redefining the search space, and as long as the resource is used for transmitting terminal-level information, the UE-specific search space may be defined as described in the embodiments of the present application.

One search space is defined for a certain CCE aggregation level. A terminal device may have multiple search spaces, wherein the CCEs in each search space may be continuously distributed, and the terminal device needs to monitor a set of PDCCH control channels, where the set of monitored PDCCH control channels may be referred to as a "control channel candidate set (PDCCH candidate)" or a "control channel candidates (PDCCH candidates)".

2) Aggregation Level (AL):

indicates the number of consecutive CCEs occupied by one PDCCH. One CCE is composed of 9 Resource Element Groups (REGs), and one REG is composed of 4 Resource Elements (REs) of non-Reference Signals (RSs) that are consecutive in the frequency domain, that is, one CCE is composed of 36 REs.

3) Control resource set (control resource set):

the control channel may be divided into multiple control resource sets, each of which is a set of a group of REGs. A terminal device may monitor PDCCH on one or more sets of control resources.

In the embodiment of the present invention, for a network device, a control resource set may be understood as a resource occupied by sending a control channel; for the terminal devices, the search space of the PDCCH of each terminal device belongs to the set of control resources. In other words, the network device may determine the resources used for transmitting the PDCCH from the set of control resources, and the terminal device may determine the search space of the PDCCH from the set of control resources. The control resource set may include time-frequency resources, for example, a segment of bandwidth in the frequency domain, or one or more sub-bands; the time domain may be the number of time units, for example, the number of symbols in a subframe or a time slot or a micro-slot; the time-frequency domain may be continuous or discontinuous resource units, e.g., continuous Resource Blocks (RBs) or discontinuous RBs.

It should be understood that the specific contents of the frequency domain resource, the time domain resource and the time frequency domain resource listed above are only exemplary, and should not constitute any limitation to the embodiments of the present invention. For example, the definition of RB may be a resource defined in the existing LTE protocol, may be a resource defined in a future protocol, or may be replaced with another nomenclature. For another example, the time unit may be a subframe, a slot (slot), a radio frame, a micro slot (mini slot or sub slot), multiple aggregated slots, multiple aggregated subframes, a symbol, and the like, and may be a Transmission Time Interval (TTI), which is not particularly limited in this embodiment.

In this embodiment, the terminal may send UCI or data to the first network device and the second network device at the same time, where the UCI or data may be considered as common information of the first network device and the second network device. The terminal may also send UCI or data specific to the first network device, and send UCI or data specific to the second network device, respectively.

It should be understood that the UCI or data is carried on an uplink channel. That is to say, the uplink channel may be used to carry the UCI or the data, and the embodiment of the present application does not limit the specific UCI or data carried by the uplink channel.

The serving cell c according to the embodiment of the present application may be understood as a carrier c. The transmission of the terminal in the serving cell c may be understood as the transmission of the terminal on the carrier c. The serving cell may be a primary cell of RRC connection or a cooperative cell.

Optionally, the uplink channel may be PUCCH and/or PUSCH.

Optionally, the higher layer signaling related to the embodiment of the present application may be RRC signaling, MAC CE signaling, or the like.

Optionally, the "carrier" described in this application corresponds to a certain frequency band, for example, a frequency band with a central frequency point of 800M or a frequency band with a central frequency point of 900M.

In addition, the sending of the uplink channel described in this application may be understood as sending UCI or data, and the UCI or data is carried on the uplink channel.

In addition, the higher layer according to the present application may be a MAC layer, a Radio Link Control (RLC) layer, a Packet Data Convergence Protocol (PDCP) layer, or the like, except for the physical layer.

Alternatively, the transmit power control commands to which the present application relates may be TPC commands.

Specifically, the TPC command may be a relative type command or an absolute type command. The relative type command can be understood as that the terminal has the effect of adjusting the transmission power after receiving the transmission power control command, which is similar to the effect of performing relative adjustment on the basis of the current transmission power, and the relative type command can also be called an accumulation type command; by absolute type command, it is understood that the terminal, after receiving the transmission power control command, adjusts the transmission power similarly to the initial transmission power. The specific form of the transmit power control command may be related to network requirements or specific transmission formats, and the like, and this is not limited in this application, for example, the form of the transmit power control command may be configured by a higher layer signaling instruction.

Prior to describing the power control method of the embodiment of the present application in detail, the related art is first introduced.

According to the prior art, assuming that a serving cell where a terminal is located is c, and the terminal transmits an uplink channel on a subframe i of the serving cell c, the uplink channel transmission power is calculated as follows (it should be understood that the unit of the calculation result of the following formula is d Bm):

firstly, if the uplink channel is the PUSCH, calculating the transmission power of the uplink channel:

1. and if the subframe i transmits the PUSCH but the PUCCH does not transmit simultaneously, the PUSCH transmission power is as follows:

2. if the subframe i transmits the PUSCH and simultaneously transmits the PUCCH, the PUSCH transmission power is as follows:

3. if subframe i does not transmit PUSCH, for the received transmitter power control command accumulation on DCI format 3/3a for PUCCH, the PUSCH transmit power is as follows:

wherein, the meaning of each symbol parameter is as follows:

(1) min represents the minimum and log represents the logarithm.

(2).P_CMAX,c(i) Is the configured maximum transmit power of the terminal on the subframe i of the serving cell c,

is P_CMAX,c(i) The linear value of (c). If the terminal transmits PUCCH with PUSCH in serving cell c subframe i, the TPC commands received on DCI format 3/3a for PUCCH are accumulated. If the terminal does not transmit PUCCH and PUSCH in serving cell c subframe i, P is the accumulation of received TPC commands on PUCCH in DCI format 3/3A_CMAX,c(i) Specific definitions may refer to existing standards, for example, 3GPP Technical Specification Group Radio Access Network (TS-GRAN) 36.101, according to the calculation assuming that MPR is 0dB, a-MPR is 0dB, P-MPR is 0dB, and TC is 0 dB.

(3).

Is P_PUCCH(i) Linear value of (A), P_PUCCH(i) The definitions are described later.

(4).M_PUSCH,c(i) The bandwidth of the PUSCH Resource allocated in subframe i of serving cell c is represented by the number of effective Resource Blocks (RBs).

(5) If the terminal is configured with a higher layer parameter UplinkPowerControlDedicated-v12x0 for serving cell c and if subframe i belongs to uplink power control subframe set2 indicated by a higher layer parameter tpc-subframe set-r12,

(5.1) when j is 0, P_{O_PUSCH,c}(0)＝P_{O_UE_PUSCH,c,2}(0)+P_{O_NOMINAL_PUSCH,c,2}(0) Where j ═ 0 is used for PUSCH transmission/retransmission for the corresponding semi-persistent grant. P_{O_UE_PUSCH,2}(0) And P_{O_NOMINAL_PUSCH,2}(0) Is provided by high-level parameters p 0-terminal-PUSCH-Persistent-subframe set2-r12 and p0-NominalPUSCH-Persistent-subframe set2-r 12.

(5.2) when j is 1, P_{O_PUSCH,c}(1)＝P_{O_UE_PUSCH,c,2}(1)+P_{O_NOMINAL_PUSCH,c,2}(1) Where j 1 is used for PUSCH transmission/retransmission for the corresponding dynamic scheduled grant. P_{O_UE_PUSCH,2}(1) And P_{O_NOMINAL_PUSCH,2}(1) Is provided by high-layer parameters p 0-terminal-PUSCH-subframe set2-r12 and p0-NominalPUSCH-subframe set2-r 12.

(5.3) when j is 2, P_{O_PUSCH,c}(2)＝P_{O_UE_PUSCH,c}(2)+P_{O_NOMINAL_PUSCH,c}(2) Where j 2 is used for PUSCH transmission/retransmission corresponding to random access response grant. P_{O_UE_PUSCH,c}(2)＝0，P_{O_NOMINAL_PUSCH,c}(2)＝P_{O_PRE}+Δ_{PREAMBLE_Msg3}Wherein the parameter preambernitalReceivedTargetPower (P)_{O_PRE}) And Δ_{PREAMBLE_Msg3}Defined in a higher layer.

Otherwise

(5.4)P_{O_PUSCH,c}(j) Parameter part P provided by a higher layer_{O_NOMINAL_PUSCH,c}(j) J 0 and j 1 and a parameter part P_{O_UE_PUSCH,c}(j) J is the sum of 0 and j is 1. PUSCH transmission (retransmission) corresponding to semi-persistent grant, j ═ 0; PUSCH transmission (retransmission) corresponding to dynamic scheduled grant, j ═ 1; for PUSCH transmission (retransmission) of random access response grant, j ═ 2. P_{O_UE_PUSCH,c}(2)＝0，P_{O_NOMINAL_PUSCH,c}(2)＝P_{O_PRE}+Δ_{PREAMBLE_Msg3}Wherein the parameter preambernitalReceivedTargetPower (P)_{O_PRE}) And Δ_{PREAMBLE_Msg3}Defined in a higher layer.

(6) If the terminal is configured with a higher layer parameter UplinkPowerControlDedicated-v12x0 for serving cell c and if subframe i belongs to uplink power control subframe set2 indicated by a higher layer parameter tpc-subframe set-r12,

(6.1) for j 0 or j 1, α_c(j)＝α_c,2E.g. {0,0.4,0.5,0.6,0.7,0.8,0.9,1 }. Wherein alpha is_c,2Is the parameter alpha-subframe set2-r12 provided by the higher layer. For j 2, α_c(j)＝1。

Otherwise

(6.2). 0 or 1 for j, α_cE {0,0.4,0.5,0.6,0.7,0.8,0.9,1} is a 3-bit parameter provided by higher layers. Forj is 2, alpha_c(j)＝1。

(7).PL_cIs the downlink path loss estimated and calculated for the terminal of serving cell c. PL_cReference Signal Received Power (RSRP), which is provided by a higher layer, corresponds to a Reference serving cell definition.

(8).

(9).δ_PUSCH,cIs a correlation value calculated from the TPC command.

If the terminal is configured with a higher layer parameter UpLinkPowerControlDedicated-v12x0 and if subframe i belongs to the uplink power control subframe set2 indicated by the higher layer parameter tpc-subframe set-r12, then the current PUSCH power control adjustment state is represented by f_c,2(i) Given, and the terminal will use f_c,2(i) In place of f_c(i) To determine P_PUSCH,c(i) In that respect Otherwise, the current PUSCH power control adjustment state is f_c(i) It is given. f. of_c,2(i) And f_c(i) Is defined as:

f_c(i)＝f_c(i-1)+δ_PUSCH,c(i-K_PUSCH)，f_c,2(i)＝f_c,2(i-1)+δ_PUSCH,c(i-K_PUSCH)

the mapping of the TPC command field may be as shown in table one and table two below.

Watch 1

Watch two

As can be seen from the above description, if the DCI format of the TPC command is 0/3/4/3a, the TPC command is an accumulation type command, and the terminal can determine the adjustment step size, i.e. the accumulated δ, according to the value of the TPC command field_PUSCHAnd then the transmission power of the PUSCH can be determined; if the DCI format transmitting the TPC command is 0/4, it indicates that the TPC command is an absolute command, and the terminal may determine the power adjustment value, i.e. the absolute delta, according to the value of the TPC command field_PUSCHAnd then the transmission power of the PUSCH can be determined.

Secondly, if the uplink channel is PUCCH, calculating the transmission power of the uplink channel:

1. PUCCH transmit power on subframe i is as follows:

2. if the PUCCH is not transmitted for the primary cell terminal, the PUCCH transmit power for the accumulation of TPC commands for the PUCCH is as follows:

wherein, the meaning of each symbol parameter is as follows:

(1) min represents the minimum and log represents the logarithm.

(2).P_CMAX,c(i) Is the configured maximum transmit power of the terminal on subframe i of serving cell c. If the terminal transmits PUCCH with PUSCH in serving cell c subframe i, the TPC commands received on DCI format 3/3a for PUCCH are accumulated. For a received PUCCH on DCI format 3/3A if the terminal does not transmit PUCCH and PUSCH in serving cell c subframe iTPC command accumulation, P_CMAX,c(i) Specific definitions may refer to existing standards, such as 3GPP TS-GRAN 36.101, calculated assuming that MPR is 0dB, a-MPR is 0dB, P-MPR is 0dB, and TC is 0 dB.

(3).Δ_{F_PUCCH}(F) Provided by a higher layer. Each delta_{F_PUCCH}(F) The value corresponds to a PUCCH format (F) associated with PUCCH format 1A, where the PUCCH format (F) is defined in table 5.4-1 in 3GPP TS-GRAN 36.211, as shown in table three below for the supported PUCCH formats.

Watch III

PUCCH format	Modulation scheme	Number of bits per subframe Mbit
			1	N/A	N/A
1a	BPSK	1
			1b	QPSK	2
2	QPSK	20
			2a	QPSK+BPSK	21
2b	QPSK+BPSK	22
			3	QPSK	48

(4) If the terminal transmits PUCCH on 2 antenna ports through higher layer configuration, then Δ_TxD(F ') is provided by higher layers, wherein PUCCH format F' is defined in table 5.4-1 (table three above) in 3GPP TS-GRAN 36.211; else Δ_TxD(F')。

(5).h(n_CQI,n_HARQ,n_SR) Is a value associated with the PUCCH format, where n is_CQIThe number of information bits representing channel quality information. N if subframe i configures a subframe for a Scheduling Request (SR) of a terminal without any UL-SCH related transport block_SR1 is ═ 1; otherwise n_SR＝0。n_HARQThe number of HARQ-ACK bits sent for the terminal.

(6).P_{0_PUCCH}Is a parameter P provided by a higher layer_{O_NOMINAL_PUCCH}And parameters P provided by higher layers_{O_UE_PUCCH}And (c) a parameter consisting of the sum.

(7).PL_cIs the downlink path loss estimated and calculated for the terminal of serving cell c. PL_cReference Signal Received Power (RSRP), which is provided by a higher layer, corresponds to a Reference serving cell definition.

(8).δ_PUCCHIs a correlation value calculated from the TPC command.

Wherein, g (i) is the current PUCCH power control adjustment state, and g (0) is the reset initial value.

The mapping of the TPC command field may be as shown in table four and table five below.

Watch four

Watch five

As can be seen from the above description, according to the format of DCI transmitting the TPC command, the terminal can determine the adjustment step size, i.e., δ, according to the value of the TPC command field_PUCCHAnd then the transmit power of the PUCCH may be determined.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 2 is a schematic diagram of apower control method 200 according to an embodiment of the present disclosure. Themethod 200 may be used in a communication system that communicates over a wireless air interface, which may include at least one network device and at least one terminal. The communication system may be, for example, thewireless communication system 100 shown in fig. 1.

Optionally, the network device may be a Transmission Reception Point (TRP), a base station, or may also be other network devices for transmitting DCI, which is not particularly limited in this application.

It should be understood that the terms "first", "second", and the like in the embodiments of the present application are used for distinguishing between the description and the claims, and should not be construed as limiting the invention in any way. For example, the first network device and the second network device are merely to distinguish between different network devices.

S210, the terminal receives at least one downlink control information DCI sent by at least one network device in the same carrier.

Specifically, the at least one DCI includes a plurality of transmit power control commands of the terminal, which correspond one-to-one to a plurality of network devices. That is, each transmission power control command corresponds to one network device, and the terminal may determine the uplink channel transmission power of the corresponding network device according to each transmission power control command.

Taking the example that the at least one DCI includes two transmission power control commands (e.g., denoted as a first transmission power control command and a second transmission power control command), assuming that the first transmission power control command corresponds to a first network device in thesystem 100 and the second transmission power control command corresponds to a second network device in thesystem 100, the terminal may determine the transmission power of an uplink channel (e.g., denoted as a first uplink channel) corresponding to the first network device according to the first transmission power control command and determine the transmission power of an uplink channel (e.g., denoted as a second uplink channel) corresponding to the second network device according to the second transmission power control command.

It is to be understood that the first uplink channel may be a PUCCH or a PUSCH, or the first uplink channel includes a PUCCH and a PUSCH. The second uplink channel may be a PUCCH or a PUSCH, or the first uplink channel includes a PUCCH and a PUSCH.

In addition, it should be noted that the at least one DCI including the plurality of transmit power control commands may be scrambled using a cell radio network temporary identifier (C-RNTI). And the terminal descrambles the at least one DCI by adopting the C-RNTI.

In this embodiment, the DCI received by the terminal may be sent by a certain network device (e.g., a first network device or a second network device in the system 100), or may be sent by multiple network devices (e.g., a first network device and a second network device in the system 100). Both cases are described in detail below.

The first condition is as follows:

and the terminal receives at least one DCI transmitted by certain network equipment on the same carrier.

In case one, the following description will take the case where the terminal receives DCI from the first network device on the same carrier without loss of generality.

For the case one, two scenarios can be specifically distinguished.

Scenario (one): the terminal receives at least two DCIs (e.g., a first DCI and a second DCI) transmitted by a first network device on the same carrier.

Specifically, one of the at least two transmission power control commands is included in each DCI.

For example, the first DCI includes a first transmit power control command and the second DCI includes a second transmit power control command. In addition, the first DCI may further include transmission power control commands of other terminals than the first transmission power control command, and similarly, the second DCI may further include transmission power control commands of other terminals than the second transmission power control command.

Alternatively, the first DCI and the second DCI may be transmitted by the first network device in a time division manner, and the first network device may transmit the first DCI at a first time and transmit the second DCI at a second time. For example, a first network device may transmit a first DCI in a first subframe, a first slot, or a first mini-slot (mini-slot), and a second network device may transmit a second DCI in a second subframe, a second slot, or a second mini-slot.

Scenario (b): the terminal receives one DCI transmitted by the first network device on the same carrier (hereinafter, referred to as a target DCI for convenience of description).

Specifically, the terminal receives a target DCI transmitted by the first network device, the target DCI including at least two transmit power control commands of the terminal, e.g., a first transmit power control command and a second transmit power control command.

It should be understood that the target DCI may include only a plurality of transmission power control commands for the terminal, and may also include transmission power control commands for terminals other than the terminal.

Alternatively, the format of the target DCI may be any one of 3/3A/3B.

At this time, the transmission power control commands of the plurality of terminals may be included in the target DCI. Wherein the transmission power control commands for each terminal include at least two. The at least two transmit power control commands for each terminal may occupy n bits, n being a positive integer greater than 2.

For example, with the number of transmit power control commands for each terminal being m (m ≧ 2), the transmit power control commands for each terminal may occupy a × m (a × m ═ n) bits. Wherein each transmit power control command may occupy a bits. Alternatively, each transmit power control command may occupy a different bit. For example, when a is 2 and m is 2, the first transmit power control command and the second transmit power control command of each terminal may occupy 2 bits. Alternatively, the first transmit power control command for each terminal may occupy 1bit and the second transmit power control command may occupy 3 bits. The specific correspondence between the bits and the transmission power control commands may be configured by the first network device through high-layer signaling, or may be predefined by the first network device and the terminal. For example, when n is 4, the first two bits of the n bits may represent a first transmission power control command, and the last two bits may represent a second transmission power control command.

It should be understood that the above description is only exemplary and is intended to assist those skilled in the art in better understanding the present application. The corresponding relationship between the n bits and the at least two transmission power control commands and the way in which the terminal learns the corresponding relationship are not specifically limited in the present application.

Optionally, the format of the target DCI may be any one of 1A/1B/1D/1/2 a/2/2B/2C/2D. At this time, at least two transmission power control commands for the terminal may be included in the target DCI. Wherein at least two transmit power control commands for the terminal may occupy n bits, n being a positive integer greater than 2.

Taking the target DCI including two transmit power control commands (a first transmit power control command and a second transmit power control command) for the terminal, and n is 4 as an example, each of the first transmit power control command and the second transmit power control command may occupy 2 bits. For example, the first transmit power control command may occupy the first 2 bits and the second transmit power control command may occupy the second 2 bits. For another example, the first transmit power control command may occupy the last 2 bits, and the second transmit power control command may occupy the first 2 bits. Further, the first transmit power control command may occupy 1bit and the second transmit power control command may occupy 3 bits. For example, the first transmit power control command may occupy the first 1bit and the second transmit power control command may occupy the last 3 bits. As another example, the first transmit power control command may occupy the last 1bit and the second transmit power control command may occupy the first 3 bits. The corresponding relation between the specific bit and the transmission power control command can be configured by high-level signaling or can be predefined.

It should be understood that the above description is only exemplary and is intended to assist those skilled in the art in better understanding the present application. The corresponding relationship between the n bits and the at least two transmission power control commands and the way in which the terminal learns the corresponding relationship are not specifically limited in the present application.

Further, each of the at least two transmit power control commands may be represented by a transmit power control command number, e.g., a TPC command number. For example, TPC command number 1 may represent a first transmit power control command, and TPC command number 2 may represent a second transmit power control command.

It should be understood that, in the embodiments of the present application, the specific correspondence between the transmission power control command number and the transmission power control command is not limited. The corresponding relationship may be configured by the first network device through a high-layer signaling, or may be predefined by the first network device and the terminal.

It should also be understood that the above-described format of the DCI is only an exemplary illustration, and the format of the DCI may also be another format defined by the future 5G, and the format of the DCI is not specifically limited in the embodiments of the present application.

It should be further noted that, for the first case, if the first network device is a network device of a cooperative cell, the first network device first acquires the C-RNTI of the terminal. For example, the first network device may obtain the C-RNTI from a network device (e.g., a second network device) of the primary cell, and scramble DCI transmitted by the first network device using the C-RNTI.

Case two:

the terminal receives one DCI transmitted by each of a plurality of network devices (e.g., a first network device and a second network device) on the same carrier.

In this case, one transmit power control command for the terminal is included in each DCI.

For example, the terminal receives a first DCI sent by a first network device, where the first DCI includes a first transmit power control command, and receives a second DCI sent by a second network device, where the second DCI includes a second transmit power control command.

It should be noted that, if the first network device is a network device of a cooperative cell, the first network device first needs to obtain the C-RNTI of the terminal from the second network device, and scramble the first DCI with the C-RNTI. If the second network device is a network device of a cooperative cell, the second network device first needs to obtain the C-RNTI of the terminal from the first network device, and scramble the second DCI by using the C-RNTI.

This case is similar to scenario (one) in case one. It should be understood that for scenario (a) in case two and case one, reference may be made specifically to related art techniques of network device transmitting TPC in the prior art, and details are not described here for brevity.

S220, the terminal determines the uplink channel transmitting power in the same carrier according to the at least two transmitting power control commands.

For example, the terminal may determine the uplink channel transmission power according to an adjustment step size or an absolute power adjustment value indicated by each transmission power control command.

In this case, if the at least two transmission power control commands are carried on one DCI, such as the target DCI above, the at least two transmission power control commands are all relative type commands or all absolute type commands. In addition, if each of the at least two transmit power control commands is carried on one DCI, the at least two transmit power control commands may be partially opposite type commands and partially absolute type commands, which is not particularly limited in this embodiment of the present invention.

Optionally, when the terminal determines the uplink channel transmission power in the same carrier according to the at least two transmission power control commands, the terminal may first determine at least two candidate transmission powers according to the at least two transmission power control commands, respectively, where the at least two candidate transmission powers correspond to the at least two transmission power control commands one to one. Then, the terminal determines the uplink channel transmitting power according to the at least two candidate transmitting powers.

For example, the terminal may directly calculate the corresponding transmit power, i.e., the candidate transmit power, according to the adjustment step size or the absolute power adjustment value corresponding to each transmit power control command. And then, determining the transmitting power of the uplink channel according to the calculated transmitting powers.

For example, the terminal may determine a maximum transmit power, a minimum transmit power, or an average of the at least two candidate transmit powers as the uplink channel transmit power.

When the terminal takes the maximum transmitting power of the at least two candidate transmitting powers as the transmitting power of the uplink channel, the reliability of transmission can be improved. When the terminal takes the minimum transmitting power of the at least two candidate transmitting powers as the transmitting power of the uplink channel, the interference to the adjacent terminal in the cell can be reduced.

For another example, the terminal may use a weighted sum of the at least two candidate transmit powers as the uplink channel transmit power. The weight value of each candidate transmit power may be calculated by the terminal, may also be configured by the network device, or may also be predefined, which is not specifically limited in this embodiment of the present application.

Optionally, when the terminal determines the uplink channel transmission power in the same carrier according to the at least two transmission power control commands, the terminal may also determine the uplink channel transmission power directly according to one of the at least two transmission power control commands (for example, referred to as a target transmission power control command).

At this time, the terminal does not need to calculate the candidate transmission powers corresponding to the at least two transmission power control commands respectively, but only needs to select one transmission power control command from the at least two transmission power control commands according to the actual performance requirement, and then determines the uplink channel transmission power according to the selected transmission power control command. For example, in order to guarantee the reliability of transmission, the terminal may select, as the first transmission power control command, the transmission power control command whose indicated adjustment step size or absolute power adjustment value is the largest, that is, the adjustment step size or absolute power adjustment indicated by the target transmission power control command is the largest. As another example, to reduce interference to neighboring terminals, the target transmit power control command may be a transmit power control command that indicates the adjustment step size or absolute power adjustment value that is the smallest.

By way of example and not limitation, the terminal may determine the target transmit power control command according to at least one of a resource location where the at least one DCI is located, an aggregation level, a scrambling scheme, and included first indication information.

Specifically, the terminal determines a transmission power control command included in the candidate DCI as a target transmission power control command, the target DCI satisfying at least one of the following conditions:

(1) bearing the load in the target resource position;

(2) the aggregation grade is a target aggregation grade;

(3) the scrambling mode is a target scrambling mode;

(4) the included first indication information is target first indication information.

For example, the protocol or system may provide that the terminal considers only the transmission power control command satisfying any one or any combination of the above conditions (1) to (4) as a valid transmission power control command, and considers the transmission power control command not satisfying the corresponding condition as an invalid transmission power control command.

Optionally, the network device may notify the terminal of at least one of the target resource location, the target aggregation level, the target scrambling mode, and the target first indication information through a higher layer signaling or DCI.

Next, each condition described above will be explained in detail.

Condition (1):

alternatively, the target location may be any one of a target search space, a target control channel candidate set, a target carrier, and a target control resource set.

As an embodiment of the present application, the time-frequency resource carrying the at least one DCI is located in at least one search space of the terminal. And the terminal determines the transmission power control command included in the DCI detected in the target search space in the at least one search space as the target transmission power control command.

Optionally, the at least one search space corresponds to the at least one DCI one to one, that is, each search space carries one DCI. The terminal takes the transmission power control command included in the DCI detected in the target search space (e.g., denoted as search space # J) among the at least one search space as the target transmission power control command. Optionally, the at least one search space may be predefined or preconfigured.

Further, the search space # J corresponds to a serving network device of the terminal, i.e., the serving network device may use time-frequency resources in the search space # J, and the cooperating network device may use time-frequency resources in other search spaces. In this case, the terminal may detect DCI transmitted by the serving network device in the search space # J and DCI transmitted by the cooperating network device in the other search space. Or, in other words, the DCI detected by the terminal in the search space # J is sent by the serving network device, the DCI detected in the other search spaces is sent by the cooperative network device, and the terminal determines the transmit power control command included in the DCI sent by the serving network device as the target transmit power control command.

As another embodiment of the present application, the at least one DCI may be carried on at least one control channel candidate set in the same search space. And the terminal determines the transmission power control command included in the DCI detected in the target control channel candidate set of the at least one control channel candidate set as a target transmission power control command.

Optionally, the at least one control channel candidate set corresponds to at least one DCI one to one, that is, each control channel candidate set carries one DCI. The terminal takes, as a target transmission power control command, a transmission power control command included in DCI detected on a target control channel candidate set (e.g., denoted as control channel candidate set # Q) among the at least one control channel candidate set. Optionally, the at least one control channel candidate set may be predefined or pre-configured.

Further, the control channel candidate set # Q corresponds to the serving network device of the terminal, i.e., the DCI transmitted by the serving network device on the control channel candidate set # Q, and the DCI transmitted by the cooperating network device on the other control channel candidate set. Accordingly, the terminal may detect DCI transmitted by the serving network device on the control channel candidate set # Q and DCI transmitted by the cooperating network device on the other control channel candidate sets. Or, in other words, the DCI detected by the terminal on the control channel candidate set # Q is sent by the serving network device, the DCI detected on the other control channel candidate sets is sent by the cooperating network devices, and the terminal determines the transmit power control command included in the DCI sent by the serving network device as the target transmit power control command.

As a further embodiment of the present application, the at least one DCI may be carried on at least one carrier. And the terminal determines the transmission power control command included in the DCI detected by the target carrier in the at least one carrier as the target transmission power control command.

Optionally, the at least one carrier corresponds to the at least one DCI one to one, that is, one DCI is transmitted on each carrier. The terminal takes the transmission power control command included in the DCI detected on the target carrier (e.g., denoted as carrier # R) of the at least one carrier as the target transmission power control command. Optionally, the at least one carrier may be predefined or preconfigured.

Further, the carrier # R corresponds to a serving network device of the terminal, that is, DCI transmitted on the carrier # R by the serving network device, and DCI transmitted on other carriers of the at least one carrier by the cooperating network device. Accordingly, the terminal may detect DCI transmitted by the serving network device on carrier # R and DCI transmitted by the cooperating network device on the other carriers. Or, in other words, the DCI detected by the terminal on the carrier # R is sent by the serving network device, the DCI detected on the other carrier is sent by the cooperating network device, and the terminal determines the transmit power control command included in the DCI sent by the serving network device as the target transmit power control command.

As a further embodiment of the present application, the at least one DCI may be carried in at least one set of control resources. And the terminal determines the transmission power control command included in the DCI detected by the target control resource set in the at least one control resource set as the target transmission power control command.

Optionally, the at least one control resource set corresponds to the at least one DCI one to one, that is, one DCI is transmitted on a resource in each control resource set. The terminal regards, as a target transmission power control command, a transmission power control command included in DCI detected on a target control resource set (e.g., denoted as control resource set # V) among the at least one control resource set. Optionally, the at least one set of control resources may be predefined or preconfigured.

Further, the control resource set # V corresponds to the serving network device of the terminal, i.e., the DCI transmitted on the resource in the control resource set # R by the serving network device, and the DCI transmitted on the resource in the other control resource set by the cooperating network device. Accordingly, the terminal may detect DCI transmitted by the serving network device on a resource in the control resource set # V and DCI transmitted by the cooperating network device on a resource in the other control resource set. Or, in other words, the DCI detected by the terminal on the resource in the control resource set # V is sent by the serving network device, the DCI detected on the resource in the other control resource set is sent by the cooperative network device, and the terminal determines the transmit power control command included in the DCI sent by the serving network device as the target transmit power control command.

It should be understood that the search space, the control channel candidate set, and the control resource set carrier described above only exemplarily illustrate a manner in which the terminal determines the target transmission power control command according to the detected DCI position, but this is not intended to constitute any limitation in the present application, and the present application may also define or distinguish the DCI position in other manners, for example, the DCI position may be specifically defined as a time-frequency resource position, a subcarrier interval, and the like, which is not limited in this embodiment of the present application.

Condition (2):

specifically, the at least one DCI received by the terminal is generated using at least one aggregation level. And the terminal determines the transmission power control command included in the DCI adopting the target aggregation in the at least one aggregation level as a target transmission power control command.

Optionally, the at least one aggregation level corresponds to the at least one DCI one to one, that is, different DCIs are generated by using different aggregation levels. The terminal may use, as the target transmission power control command, a transmission power control command included in DCI having an aggregation level of a target aggregation level (e.g., denoted as aggregation level # S'). Optionally, the at least one aggregation level may be predefined or preconfigured.

Further, the aggregation level # S corresponds to a serving network device of the terminal, that is, the serving network device generates DCI # S according to the aggregation level # S and transmits it to the terminal. In this case, the terminal determines a transmission power control command included in DCI transmitted by the serving network device as a target transmission power control command.

Condition (3):

specifically, the at least one DCI may be scrambled using at least one scrambling scheme. And the terminal determines the transmission power control command included in the DCI adopting the target scrambling mode in the at least one scrambling mode as the target transmission power control command.

Optionally, the at least one scrambling method corresponds to the at least one DCI one to one, that is, different DCIs are generated by using different scrambling methods. And after receiving the at least one DCI, the terminal descrambles the DCI by adopting descrambling modes respectively corresponding to the at least one scrambling mode. If a certain DCI can be descrambled by a target descrambling scheme (for example, denoted as descrambling scheme # T, which corresponds to scrambling scheme # T), the transmit power control command included in the DCI is determined as a target transmit power control command. Optionally, the at least one scrambling means may be predefined or preconfigured.

Further, when the DCI is scrambled, Cyclic Redundancy Check (CRC) scrambling may be performed using a terminal identity (UE identity, UE ID) + a cell identity (cell ID). The UE ID may be, for example, a cell radio network temporary identity (C-RNTI), and the cell ID may be, for example, a physical layer cell identity (PCI).

Optionally, the scrambling scheme # T corresponds to a serving network device of the terminal, that is, the serving network device generates DCI # T according to the scrambling scheme # T and transmits the DCI # T to the terminal. In this case, the terminal can descramble the DCI # T according to the descrambling scheme # T, thereby determining the transmission power control command included in the DCI # T (i.e., the DCI transmitted by the serving network device) as the target transmission power control command.

It should be understood that, in the embodiment of the present application, no specific limitation is imposed on what scrambling method the at least one scrambling method is specifically, as long as the scrambling method # T is satisfied to correspond to the serving network device. It should also be understood that the UE ID and the cell ID are not particularly limited in the embodiments of the present application, and the UE ID and the cell ID listed above are only schematically illustrated.

Condition (4):

optionally, each DCI of the at least one DCI may include first indication information. For example, the first indication information may be a bit (1bit) in the DCI, and the bit may be '1' or '0'. In this embodiment, it may be specified or preconfigured that the terminal uses the first indication information as the target first indication information, for example, uses the transmission power control command included in the DCI with the first indication information being '1' as the target transmission power control command.

Alternatively, the first indication information may be part of a transmit power control command.

Optionally, the first indication information may be used to indicate whether the corresponding DCI is transmitted by the serving network device or the cooperative network device, for example, when the bit is '0', it indicates that the corresponding DCI is transmitted by the cooperative network device, and when the bit is '1', it indicates that the corresponding DCI is transmitted by the serving network device. Therefore, the terminal takes the transmission power control command included in the DCI with the first indication information of '1' as the target transmission power control command, that is, the terminal determines the transmission power control command included in the DCI sent by the serving network device as the target transmission power control command.

It should be understood that the above conditions (1) to (4) may be used in combination, and in this case, the terminal takes the transmission power control command in the DCI satisfying any combination of the conditions (1) to (4) as the target transmission power control command. In the case where the conditions (1) to (4) are used in combination, details will not be described here for the sake of brevity, and the above description of the conditions (1) to (4) may be specifically referred to.

As another embodiment of the present application, the terminal may first determine a candidate DCI (e.g., and is denoted as DCI # D) of the at least one DCI; then, the transmission power control command in DCI # D is determined as a target transmission power control command.

Specifically, the candidate DCI is determined in a predefined manner or in an interactive manner between network devices. For example, a predefined manner or a manner of interaction between network devices, specifies the candidate DCI as a DCI transmitted by the serving network device. The terminal treats only the transmit power control command in the DCI sent by the serving network device as a valid transmit power control command and ignores the transmit power control command sent by the protocol network device. In this case, the terminal needs to distinguish which DCI is transmitted by the serving network device and which DCI is transmitted by the cooperating network device.

Optionally, in a possible implementation manner, the terminal may determine DCI # D according to any one of the detected DCI position, aggregation level, scrambling scheme, and included second indication information, so as to determine the target transmission power control command.

Specifically, the serving network device and the assisting network device may transmit the DCI at different resource locations, with different aggregation levels, with different scrambling schemes, and according to at least one of different second indication information. The system or protocol may pre-specify or configure DCI information, which may be defined as at least one of a location of DCI transmitted by the serving network device, an aggregation level, a scrambling scheme, and included second indication information. Since the network device and the terminal side both store the DCI information, the terminal may determine the DCI transmitted by the serving network device, that is, DCI # D, according to at least one of the detected corresponding position, aggregation level, scrambling scheme, and included second indication information of each DCI in the at least one DCI.

It should be understood that the second indication information may be used to indicate whether the corresponding DCI is transmitted by the serving network device or the cooperative network device. For example, the second indication information may be the same as the first indication information, and the second indication information may specifically refer to the description of the first indication information, which is not described herein again for brevity.

Optionally, when the terminal determines DCI # D according to the detected DCI position, DCI # D may be determined according to a search space, a control channel candidate set, or a carrier where the DCI is located.

It should be understood that, the specific implementation process of the terminal determining the DCI # D according to any one of the detected DCI position, aggregation level, scrambling manner, and included second indication information may be described correspondingly with reference to the above manner two, and for brevity, details are not described here again.

It should also be understood that the candidate DCI may also be a DCI transmitted by a cooperative network device, which is not limited in this embodiment of the present application.

Alternatively, the information that needs to be preconfigured in the present application, such as the search space, aggregation level, etc. described above, may be configured through higher layer signaling, such as Radio Resource Control (RRC) signaling or medium access control signaling (MAC CE).

It should be understood that the terminal may determine the uplink channel transmission power in the same carrier according to the at least two transmission power control commands in various ways, and the above exemplary description is only for helping those skilled in the art to better understand the present application, and should not constitute any limitation to the present application.

In the following, a plurality of embodiments in which the terminal determines the uplink channel transmit power according to an adjustment step size or an absolute power adjustment value are specifically described, taking at least two transmit power control commands received by the terminal as TPC1 and TPC2 as examples.

Assuming that a serving cell where the terminal is located is c, a network device of the serving cell c is a first network device, and the calculated transmission power refers to transmission power of an uplink channel transmitted by the terminal on a subframe i of the serving cell c. In the embodiment of the present application, the transmission power of the uplink channel transmitted by the terminal on the subframe i of the serving cell c may be used as the transmission power of the uplink channel.

It should be understood that the following formula calculates the result in units of d Bm.

Firstly, if the uplink channel is the PUSCH, the following calculation method may be adopted for the transmission power of the PUSCH:

1. subframe i transmits PUSCH but PUCCH does not transmit simultaneously, then PUSCH transmit power may be determined by any of the following equations:

2. if subframe i transmits the PUSCH simultaneously with the PUCCH, the PUSCH transmit power may be determined by any of the following formulas:

3. if subframe i does not transmit PUSCH, for a received transmitter power control command accumulation on DCI format 3/3a for PUCCH, the PUSCH transmit power may be determined by any of the following equations:

wherein some of the above parameters are defined, e.g. P_CMAX,c(i)、M_PUSCH,c(i)、α_c(j) Etc. reference is made to the foregoing description, which is not repeated herein for the sake of brevity.

Note that PL herein_cThe downlink path loss from the first network equipment to the terminal is obtained through estimation and calculation for the terminal. Note also that f_1c(i) And f_2c(i) Corresponding to f in the above_c(i)，f_1c(i) Is determined according to the adjustment step size or power adjustment value indicated by TPC1, f_2c(i) Is determined based on the adjustment step size or power adjustment value indicated by TPC 2.

In addition, the above-mentioned S₁₁＝10log₁₀(M_PUSCH,c(i))+P_{O_PUSCH,c}(j)+α_c(j)·PL_c+Δ_TF,c(i)+f_1c(i)，

S₁₂＝10log₁₀(M_PUSCH,c(i))+P_{O_PUSCH,c}(j)+α_c(j)·PL_c+Δ_TF,c(i)+f_2c(i)。

Furthermore, k₁₁、k₁₂、k₂₁、k₂₂、k₃₁、k₃₂The values of (A) are all greater than or equal to 0, and they may be the same or different. k is a radical of₁₁、k₁₂、k₂₁、k₂₂、k₃₁、k₃₂The configuration may be preconfigured, or may be pre-acquired by the terminal from the network device, or may be calculated by the terminal itself, and the embodiment of the present application is not limited to a specific source.

Therefore, according to any of the above formulas, the terminal can determine the transmission power of the PUSCH (an example of an uplink channel).

Secondly, if the uplink channel is the PUCCH, the transmit power of the PUCCH may be calculated in the following manner:

1. PUCCH transmit power on subframe i is as follows:

2. if the PUCCH is not transmitted for the primary cell terminal, the PUCCH transmit power for the accumulation of TPC commands for the PUCCH is as follows:

for the definition of some of the above parameters, reference may be made to the foregoing description, and for the sake of brevity, the detailed description is omitted here.

Note that PL herein_cThe downlink path loss from the first network equipment to the terminal is obtained through estimation and calculation for the terminal. Also, g is_1c(i) And g_2c(i) Corresponding to g in the above_c(i)，g_1c(i) Is determined according to the adjustment step indicated by TPC1, f_2c(i) Is determined based on the adjustment step size indicated by TPC 2.

In addition, the above-mentioned T₁₁＝P_{0_PUCCH}+PL_c+h(n_CQI,n_HARQ,n_SR)+Δ_{F_PUCCH}(F)+Δ_TxD(F')+g_1c(i)，

T₁₂＝P_{0_PUCCH}+PL_c+h(n_CQI,n_HARQ,n_SR)+Δ_{F_PUCCH}(F)+Δ_TxD(F')+g_2c(i)。

Furthermore, k₄₁、k₄₂、k₅₁、k₅₂The values of (A) are all greater than or equal to 0, and they may be the same or different. k is a radical of₄₁、k₄₂、k₅₁、k₅₂The configuration may be preconfigured, or may be pre-acquired by the terminal from the network device, or may be calculated by the terminal itself, and the embodiment of the present application is not limited to a specific source.

Therefore, according to any of the above formulas, the terminal can determine the transmission power of the PUCCH (another instance of the uplink channel).

It should be understood that the above embodiments in which the terminal determines the uplink channel transmit power according to the adjustment step size or the absolute power adjustment value are merely exemplary illustrations, and are only for helping those skilled in the art to better understand the present application, and should not constitute any limitation to the present application.

Optionally, the method may further include:

s230, the terminal sends the uplink channel to the at least one network device in the same carrier.

Specifically, the terminal transmits UCI or data at the uplink channel transmission power determined in step S220, and the UCI or data is carried on the uplink channel.

Therefore, according to the power control method provided by the embodiment of the application, the terminal can determine the uplink channel transmitting power according to the plurality of transmitting power control commands, so that efficient and reasonable power distribution can be ensured, and the overall performance of the system is improved.

Hereinafter, two embodiments of the power control method according to the present application are described in detail with reference to the examples of the terminal feeding back CSI described in the background art and with reference to fig. 3 and 4.

Fig. 3 is a diagram of apower control method 300 according to an embodiment of the present application.

Optionally, S310, the first network device acquires the C-RNTI of the terminal from the second network device.

If the first network device is a network device of the cooperative cell, the C-RNTI of the terminal needs to be acquired from the network device of the main cell, that is, the second network device. If the first network device is a network device of the primary cell, the first network device need not perform this step.

S320, the first network device determines the target DCI.

Specifically, the target DCI includes a first transmission power control command and a second transmission power control command of the terminal. And the target DCI is scrambled by adopting the C-RNTI of the terminal.

If the terminal needs to send the DCI or the data for the first network device to the first network device after receiving the target DCI, the terminal may determine, according to the first transmit power control command, a first uplink channel transmit power for carrying the DCI or the data for the first network device. Similarly, the terminal may determine a second uplink channel transmit power that carries DCI or data for the second network device.

For the target DCI, reference may be made to the above description, and for brevity, no further description is provided here.

S330, the first network equipment sends the target DCI to the terminal in the same carrier wave.

Accordingly, the terminal receives the target DCI, descrambles the target DCI according to the C-RNTI of the terminal, and then determines the first transmission power control command and the second transmission power control command according to high-level signaling or a predefined rule.

S340, the first network device determines the uplink channel transmit power in the same carrier according to the first transmit power control command and the second transmit power control command.

For example, the first network device determines the transmit power determined according to the first transmit power control command as the uplink channel transmit power, or determines a weighted sum of the first transmit power control command and the second transmit power control command as the uplink channel transmit power. In particular, reference may be made to the above description, which is not repeated herein for the sake of brevity.

S350, the terminal sends the uplink channel to the first network device and the second network device in the same carrier.

The uplink channel carries the CSI1 from the terminal to the first network device and the CSI2 from the terminal to the second network device.

Therefore, according to the power control method provided by the embodiment of the application, the terminal can determine the uplink channel transmitting power according to the plurality of transmitting power control commands, so that efficient and reasonable power distribution can be ensured, and the overall performance of the system is improved.

Fig. 4 is a schematic diagram of a power control method according to another embodiment of the present application. In the embodiment shown in fig. 4, a description is given by taking a first network device as a network device of a main cell, and a second network device as a network device of a cooperative cell as an example.

S410, the first network equipment sends first DCI to the terminal, and the first DCI comprises a first sending power control command.

If the terminal needs to send the DCI or the data for the first network device to the first network device after receiving the first DCI, the terminal may determine, according to the first transmit power control command, a first uplink channel transmit power carrying the DCI or the data for the first network device.

It is to be understood that reference may be made to the above description regarding the specific form or format of the first DCI and/or the first transmit power control command.

S420, the second network device sends a request message to the first network device, wherein the request message is used for acquiring the C-RNTI of the terminal.

S430, the first network equipment sends a response message to the second network equipment according to the request message, wherein the response message comprises the C-RNTI of the terminal.

It should be understood that step S410 may be performed before steps S420 and S430, may be performed after steps S420 and S430, or may be performed simultaneously with steps S420 and S430, which is not limited in this embodiment of the application.

S440, the second network device sends a second DCI to the terminal, where the second DCI includes a second transmit power control command.

It should be understood that the second DCI is scrambled with the C-RNTI of the terminal.

Similar to S410, the terminal may determine, according to the second DCI, a second uplink channel transmission power carrying DCI or data for the second network device.

It is to be understood that reference may be made to the above description regarding the specific form or format of the first DCI and/or the first transmit power control command.

S450, the terminal determines the uplink channel transmitting power in the same carrier according to the first transmitting power control command and the second transmitting power control command.

Specifically, the uplink channel carries CSI1 from the terminal to the first network device and CSI2 from the terminal to the second network device.

It should be understood that, the terminal may specifically refer to the above description for determining the uplink channel transmission power according to the first transmission power control command and the second transmission power control command, and details are not described herein for brevity.

And S460, the terminal sends the uplink channel in the same carrier according to the uplink channel transmitting power.

Therefore, according to the power control method provided by the embodiment of the application, the terminal can determine the uplink channel transmitting power according to the plurality of transmitting power control commands, so that efficient and reasonable power distribution can be ensured, and the overall performance of the system is improved.

Fig. 5 is a schematic diagram of anotherpower control method 500 according to the present application. Themethod 500 may be used in a communication system that communicates over a wireless air interface, and the communication system may include at least two network devices and at least one terminal. The communication system may be, for example, thewireless communication system 100 shown in fig. 1.

Optionally, the network device may be a transmission point (TRP), a base station, or other network devices for transmitting DCI, which is not particularly limited in this application.

Optionally, the network device may be a network device of a primary cell, and may also be a network device of a cooperative cell, which is not particularly limited in this application.

S510, the terminal receives, in the same carrier, downlink control information DCI transmitted by a network device (hereinafter, referred to as a first network device for convenience of description).

Specifically, the DCI includes at least two transmit power control commands for the terminal. The at least two transmit power control commands correspond one-to-one with the at least two network devices. Wherein the at least two network devices include a first network device.

Optionally, the DCI format may be any one of 1A/1B/1D/1/2a/2/2B/2C/2D, and the DCI format may also be any one of 3/3 a/3B.

Optionally, the at least two transmit power control commands occupy n bits, n being a positive integer greater than 2.

Further, the correspondence of the n bits to the at least two transmit power control commands is configured or predefined by higher layer signaling. In particular, reference may be made to the above description, which is not repeated herein for the sake of brevity.

S520, the terminal determines the uplink channel transmitting power of each network device in the at least two network devices according to the at least two transmitting power control commands.

Taking the example that the DCI includes two transmission power control commands (e.g., denoted as a first transmission power control command and a second transmission power control command), assuming that the first transmission power control command corresponds to a first network device in thesystem 100 and the second transmission power control command corresponds to a second network device in thesystem 100, the terminal may determine the transmission power of an uplink channel (e.g., denoted as a first uplink channel) corresponding to the first network device according to the first transmission power control command and determine the transmission power of an uplink channel (e.g., denoted as a second uplink channel) corresponding to the second network device according to the second transmission power control command.

It is to be understood that the first uplink channel may be a PUCCH or a PUSCH, or the first uplink channel includes a PUCCH and a PUSCH. The second uplink channel may be a PUCCH or a PUSCH, or the first uplink channel includes a PUCCH and a PUSCH.

In addition, it should be noted that the DCI may be scrambled using a cell radio network temporary identifier (C-RNTI). If the first network device sending the DCI is a network device of a cooperative cell, the first network device may first obtain the C-RNTI from the network device of the primary cell, then scramble the DCI using the C-RNTI, and after receiving the DCI, the terminal descrambles the DCI using the C-RNTI.

Optionally, the terminal may determine the uplink channel transmit power of each network device according to an adjustment step size or an absolute power adjustment value indicated by each transmit power control command in the at least two transmit power control commands.

For example, when the transmission power control command is a relative command, the terminal may determine an adjustment step size of the transmission power of the first uplink channel according to the first transmission power control command, and may further determine the transmission power of the first uplink channel, and determine an adjustment step size of the transmission power of the second uplink channel according to the second transmission power control command, and may further determine the transmission power of the second uplink channel. Or, when the transmission power control command is an absolute command, the terminal may determine an absolute power adjustment value of the transmission power of the first uplink channel according to the first transmission power control command, and may further determine the transmission power of the first uplink channel, and determine an absolute power adjustment value of the transmission power of the second uplink channel according to the second transmission power control command, and may further determine the transmission power of the second uplink channel.

Optionally, the terminal may determine the uplink channel transmission power of each of the at least two network devices according to the at least two transmission power control commands and the propagation loss corresponding to the corresponding uplink channel.

Further, the terminal may determine the transmission power of the corresponding uplink channel by combining the adjustment step length indicated by the transmission power control command and the propagation loss corresponding to the corresponding uplink channel, or by combining the absolute power adjustment value and the propagation loss corresponding to the corresponding uplink channel.

For example, the terminal may determine the first uplink channel transmission power by combining the propagation loss between the first network device and the terminal according to the adjustment step size or the absolute power adjustment value indicated by the first transmission power control command, and determine the first uplink channel transmission power by combining the propagation loss between the second network device and the terminal according to the adjustment step size or the absolute power adjustment value indicated by the second transmission power control command.

For example, when the first uplink channel and the second uplink channel are both PUSCHs, and the PUCCH is transmitted while the PUSCH is transmitted, the transmission power P of the first uplink channel is_PUSCH1,c(i) The following were used:

transmitting power P of second uplink channel_PUSCH2,c(i) The following were used:

in the above formula, the same parameters can be referred to the foregoing description.

Wherein PL₁Indicating the downlink path loss, PL, between the terminal and the first network device calculated by the terminal estimation₂And indicating the downlink path loss between the terminal and the second network equipment estimated and calculated by the terminal. f. of_1c(i) Determination of the adjustment step size or absolute power adjustment value indicated by the first transmit power control command, f_2c(i) The adjustment step size or absolute power adjustment value indicated by the second transmit power control command.

In this embodiment of the present application, the propagation loss corresponding to the uplink channel of each network device may be indicated by the indication information or the high layer signaling in the DCI.

For example, the first network device may indicate to the terminal to employ PL via DCI or higher layer signaling₁Calculating P_PUSCH1,c(i) By using PL₂Calculating P_PUSCH2,c(i)。

Optionally, when the terminal determines the uplink channel transmission power of each of the at least two network devices according to the at least two transmission power control commands:

an ith candidate transmit power P of the at least two candidate transmit powers may be first determined based on an ith transmit power control command of the at least two transmit power control commands_1i. Wherein the at least two transmit power control commands are in one-to-one correspondence with the at least two candidate transmit powers, i is at [1, N]Is traversed and taken, i is a positive integer, N is the number of the at least two uplink channels, N is a positive integer greater than 1, P_1iIs greater than 0. For example, the terminal may directly calculate the adjustment step length or the absolute power adjustment value corresponding to the ith transmission power control commandThe transmission power is used as the ith candidate transmission power P_1i。

Then, at P₁₁+P₁₂+…+P_1N≤P₀In case that the terminal determines that the transmission power of the uplink channel of the ith network device of the at least two network devices is P_1i；

Or at P₁₁+P₁₂+…+P_1N＞P₀In case of (2), the terminal determines the transmission power P of the ith uplink channel according to any one of the following formulas_2i：

a₀*(P₁₁+P₁₂+…+P_1N)≤P₀And P is_2i＝a₀*P_1iOr is or

a₁*P₁₁+a₂*P₁₂+…+a_N*P_1N≤P₀And P is_2i＝a_i*P_1i。

Wherein, P_2i＞0，P₀Is the maximum transmission power of the terminal, a₀And a_i0 < a as a scaling factor₀＜1，a_i≥0。

Further, if the at least two uplink channels completely coincide in the time domain, the terminal may determine the transmission power of the at least two uplink channels according to the above embodiment. Specifically, if the sum of the transmission powers directly calculated from the at least two transmission power control commands is less than or equal to the maximum transmission power of the terminal, the terminal may regard the directly calculated transmission power as the transmission power of the corresponding uplink channel. If the sum of the transmitting powers directly calculated according to the at least two transmitting power control commands is larger than the maximum transmitting power of the terminal, the terminal takes the product of the scaling factor and the transmitting power directly calculated according to the corresponding transmitting power control commands as the corresponding transmitting power of the uplink channel.

For example, in conjunction with the above embodiments, at P_PUSCH1,c(i)+P_PUSCH2,c(i)≤P₀In case of (2), the terminal may send P_PUSCH1,c(i) As the transmission power of the first uplink channel, willP_PUSCH2,c(i) As the transmit power of the second uplink channel; at P_PUSCH1,c(i)+P_PUSCH2,c(i)＞P₀In case of (a), the terminal may be connected to the terminal₁*P_PUSCH1,c(i) The product of a and a is used as the transmission power of the first uplink channel_2*P_PUSCH2,c(i) As the transmit power of the second uplink channel. Wherein, a₁*P_PUSCH1,c(i)+a_2*P_PUSCH2,c(i)≤P₀。

Further, the scaling factor a_iIs determined according to the priority of the uplink channel of the ith network device.

For example, when the channel priority is high, the corresponding scaling factor is large, and when the channel priority is low, the corresponding scaling factor is small. For example, the priority of the uplink channel corresponding to the serving network device of the terminal may be higher than the priority of the uplink channel corresponding to the cooperative network device of the terminal, and then the scaling factor corresponding to the uplink channel corresponding to the serving network device of the terminal (for example, referred to as the first PUCCH) is larger than the scaling factor corresponding to the uplink channel corresponding to the assisting network device of the terminal (for example, referred to as the second PUCCH).

For another example, the priority of the PUCCH is higher than that of the PUSCH, and the scaling factor corresponding to the PUCCH may be set to 1.

For example, when two uplink channels transmitted by the terminal, that is, the first uplink channel and the second uplink channel, are the PUCCH and the PUSCH, respectively, the transmission power of the PUCCH and the PUSCH may be determined according to the following formula:

a₁P_PUSCH+P_PUCCH≤P₀

that is, a₂1, the transmission power of the first uplink channel is P_PUCCHThe transmission power of the second uplink channel is eta P_PUSCH。

In the embodiment of the present application, the scaling factor a_iThe configuration may be pre-configured, or the terminal may obtain the configuration from the network device, or the configuration may be calculated by the terminal itself. The embodiment of the application aims at the scaling factor a_iThe specific source of (A) is not limited.

Optionally, the method may further include:

and S530, the terminal transmits and sends the corresponding uplink channels to the at least two network devices in the same carrier according to the transmitting power of the corresponding uplink channels.

Specifically, the terminal sends UCI or data to the corresponding network device according to the transmission power of the uplink channel determined in step S520, where the UCI or data is carried on the corresponding uplink channel.

For example, the terminal may send UCI or data of the first network device to the first network device with the first uplink channel transmission power determined in step S520, where the UCI or data is carried in the first uplink channel; and sending the UCI or the data of the second network device to the second network device with the transmitting power of the second uplink channel determined in the step S520, where the UCI or the data is carried in the second uplink channel.

Therefore, according to the power control method of the embodiment of the application, the terminal determines the transmitting power of each uplink channel according to the plurality of transmitting power control commands, so that efficient and reasonable power distribution can be ensured, and the overall system performance is improved.

The power control method according to the embodiment of the present application is described above with reference to fig. 2 to 5. Next, a terminal and a network device according to an embodiment of the present application are described with reference to fig. 6 to 11.

Fig. 6 is a schematic block diagram of a terminal 600 according to an embodiment of the present application. As shown in fig. 6, the terminal 600 includes: a receiving unit 610 and a processing unit 620.

A receiving unit 610, configured to receive at least one downlink control information DCI sent by at least one network device, where the at least one DCI includes at least two transmit power control commands;

a processing unit 620, configured to determine, according to the at least two transmit power control commands, uplink channel transmit power in the same carrier.

According to the terminal of the embodiment of the application, the power of uplink transmission can be ensured to be smaller than the maximum transmitting power of the terminal in a power scaling mode according to the received multiple transmitting power control commands.

It should be understood that each unit in the terminal 600 is respectively configured to execute each action or process performed by the terminal in each method described above. Here, detailed description thereof is omitted in order to avoid redundancy.

Fig. 7 is a schematic block diagram of a terminal 700 according to an embodiment of the present application. As shown in fig. 7, the terminal 700 includes: a receiving unit 710 and a processing unit 720.

A receiving unit 710, configured to receive downlink control information DCI sent by a first network device, where the DCI includes at least two transmit power control commands of the terminal;

a processing unit 720, configured to determine, according to the at least two transmission power control commands, uplink channel transmission power of each of at least two network devices, where the at least two network devices correspond to the at least two transmission power control commands one to one, and the at least two network devices include the first network device.

It should be understood that the units in the terminal 700 are respectively configured to perform the actions or processes performed by the terminal in themethod 500. Here, detailed description thereof is omitted in order to avoid redundancy.

Fig. 8 is a schematic block diagram of a network device 800 according to an embodiment of the present application. As shown in fig. 8, the network device 800 includes: a transmitting unit 810 and a receiving unit 820.

A sending unit 810, configured to send downlink control information DCI to a terminal, where the DCI includes at least two transmit power control commands of the terminal, and the at least two transmit power control commands are used for the terminal to determine transmit power of at least one uplink channel;

a receiving unit 820, configured to receive a first uplink channel in the at least one uplink channel sent by the terminal.

It should be understood that each unit in the network device 800 is respectively configured to execute each action or process in the above-described method. Here, detailed description thereof is omitted in order to avoid redundancy.

Fig. 9 shows a schematic block diagram of a terminal 900 according to an embodiment of the present application. As shown in fig. 9, the terminal 900 includes: atransceiver 910, a processor 920, and amemory 930. Wherein thetransceiver 910, the processor 920 and thememory 930 communicate with each other via internal connection paths to transfer control and/or data signals.

Atransceiver 910, configured to receive at least one downlink control information DCI sent by at least one network device, where the at least one DCI includes at least two transmit power control commands;

and a processor 920, configured to determine, according to the at least two transmit power control commands, uplink channel transmit power in the same carrier.

It is to be understood that the processor 920 may be configured to execute themethod 200, themethod 300 and themethod 400 and to implement the functions of an execution subject of the method, such as a terminal, when the processor 920 calls and executes the computer program from the memory.

Fig. 10 shows a schematic block diagram of a terminal 1000 according to an embodiment of the application. As shown in fig. 10, the terminal 1000 includes: atransceiver 1010, a processor 1020, and amemory 1030. Thetransceiver 1010, the processor 1020 and thememory 1030 communicate with each other via internal communication paths to transmit control and/or data signals.

Atransceiver 1010, configured to receive downlink control information DCI sent by a first network device, where the DCI includes at least two transmit power control commands of the terminal;

a processor 1020, configured to determine, according to the at least two transmission power control commands, uplink channel transmission power of each of at least two network devices, where the at least two network devices correspond to the at least two transmission power control commands one to one, and the at least two network devices include the first network device.

It is to be understood that the processor 1020 may be configured to execute themethod 500 and to implement the functionality of an executing entity of the method, such as a terminal, when the processor 1020 invokes and runs the computer program from the memory.

Fig. 11 shows a schematic block diagram of a network device 1100 according to an embodiment of the application. As shown in fig. 11, the network device 1100 includes: atransceiver 1110, aprocessor 1120, and a memory 1130. Thetransceiver 1110, theprocessor 1120, and the memory 1130 communicate with each other via internal communication paths to transmit control and/or data signals.

Atransceiver 1110, configured to send downlink control information DCI to a terminal, where the DCI includes at least two transmit power control commands of the terminal, and the at least two transmit power control commands are used for the terminal to determine transmit power of at least one uplink channel; and receiving a first uplink channel in the at least one uplink channel sent by the terminal.

It is understood that when theprocessor 1120 invokes and runs the computer program from the memory, theprocessor 1120 can be used to execute the method embodiments and realize the execution subject of the method embodiments, such as the function of the network device.

The embodiment of the application can be applied to or realized by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software in the decoding processor. The software may be in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: 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.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A method of power control, comprising:

a terminal receives at least two downlink control information DCI sent by at least two network devices in the same carrier, wherein the DCI comprises a transmission power control command, and the at least two DCIs correspond to the at least two network devices one to one;

and the terminal determines the uplink channel transmitting power of each network device in the at least two network devices according to the at least two DCIs.

2. The method of claim 1, wherein the determining, by the terminal, the uplink channel transmit power of each of the at least two network devices according to the at least two DCIs comprises:

and the terminal determines the uplink channel transmitting power of each network device according to the adjusting step length or the absolute power adjusting value indicated by the transmitting power control command included in each DCI in the at least two DCIs.

3. The method of claim 1, wherein the determining, by the terminal, the uplink channel transmit power of each of the at least two network devices according to the at least two DCIs comprises:

the terminal determines candidate transmitting power corresponding to each DCI according to the transmitting power control command included in each DCI in the at least two DCIs;

and the terminal determines the uplink channel transmitting power of each network device according to the candidate transmitting power corresponding to each DCI.

4. A method of power control, comprising:

the network equipment sends Downlink Control Information (DCI) to a terminal, wherein the DCI comprises at least two transmission power control commands of the terminal, the at least two transmission power control commands are used for the terminal to determine the transmission power of at least two uplink channels, and the at least two uplink channels correspond to the same carrier;

and the network equipment receives a first uplink channel in the at least two uplink channels sent by the terminal.

5. The method of claim 4, wherein the at least two transmit power control commands occupy n bits, n being a positive integer greater than 2, the correspondence of the n bits to the at least two transmit power control commands being configured or predefined by higher layer signaling.

6. The method of claim 4 or 5, wherein the DCI further comprises indication information indicating a propagation loss corresponding to the uplink channel.

7. A terminal, comprising:

a receiving unit, configured to receive, in a same carrier, at least two pieces of downlink control information DCI sent by at least two pieces of network equipment, where the DCI includes a transmit power control command, and the at least two pieces of DCI correspond to the at least two pieces of network equipment one to one;

and the processing unit is used for determining the uplink channel transmitting power of each network device in the at least two network devices according to the at least two DCIs.

8. The terminal of claim 7, wherein the processing unit is specifically configured to:

and determining the uplink channel transmitting power of each network device according to the adjusting step length or the absolute power adjusting value indicated by the transmitting power control command included in each DCI of the at least two DCIs.

9. The terminal of claim 7, wherein the processing unit is specifically configured to:

determining candidate transmitting power corresponding to each DCI according to a transmitting power control command included in each DCI in the at least two DCIs;

and determining the uplink channel transmitting power of each network device according to the candidate transmitting power corresponding to each DCI.

10. A network device, comprising:

a sending unit, configured to send downlink control information DCI to a terminal, where the DCI includes at least two transmit power control commands of the terminal, where the at least two transmit power control commands are used for the terminal to determine transmit powers of at least two uplink channels, and the at least two uplink channels correspond to a same carrier;

a receiving unit, configured to receive a first uplink channel of the at least two uplink channels sent by the terminal.

11. The network device of claim 10, wherein the at least two transmit power control commands occupy n bits, n being a positive integer greater than 2, the correspondence of the n bits to the at least two transmit power control commands being configured or predefined by higher layer signaling.

12. The network device of claim 10 or 11, wherein the DCI further comprises indication information indicating a propagation loss corresponding to the uplink channel.

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