Method and device for controlling uplink power

Abstract

The present application provides method and device for controlling uplink power, where the method includes: receiving, by a terminal device, uplink power control information transmitted by a network device; determining, by the terminal device, according to the uplink power control information, a target power control parameter corresponding to a target uplink multiple access mode; and determining, by the terminal device, according to the target power control parameter, a target transmitting power when transmitting a target uplink signal using the target uplink multiple access mode. According to the method and device for controlling uplink power provided in the present application, uplink transmitting power can be flexibly adjusted to meet requirements from different uplink multiple access modes. The method and device for controlling uplink power are applicable to a communication system supporting a plurality of uplink multiple access modes.

What is claimed is: 
     
         1 . A method for controlling uplink power, comprising:
 receiving, by a terminal device, uplink power control information transmitted by a network device;   determining, by the terminal device, according to the uplink power control information, a target power control parameter corresponding to a target uplink multiple access mode; and   determining, by the terminal device, according to the target power control parameter, a target transmitting power when transmitting a target uplink signal using the target uplink multiple access mode.   
     
     
         2 . The method according to  claim 1 , wherein the target uplink multiple access mode is one of a plurality of candidate uplink multiple access modes in which the terminal device transmits the target uplink signal; or the target uplink multiple access mode is an uplink multiple access mode to be used by the terminal device to transmit the target uplink signal. 
     
     
         3 . The method according to  claim 1 , wherein the uplink power control information comprises open loop power control information, the open loop power control information comprises open loop power control parameters corresponding to a plurality of uplink multiple access modes, and the plurality of uplink multiple access modes comprises the target uplink multiple access mode;
 wherein the determining, by the terminal device, according to the uplink power control information, a target power control parameter corresponding to a target uplink multiple access mode of a plurality of uplink multiple access modes comprises:   determining, by the terminal device, according to the open loop power control information, a target open loop power control parameter corresponding to the target uplink multiple access mode in the open loop power control parameters.   
     
     
         4 . The method according to  claim 3 , wherein the target open loop power control parameter comprises at least one of the following parameters: an uplink target receiving power, a path loss factor, and a sounding reference signal (SRS) power adjustment value. 
     
     
         5 . The method according to  claim 1 , wherein the uplink power control information comprises power adjustment indication information;
 where the determining, by the terminal device, according to the uplink power control information, a target power control parameter corresponding to a target uplink multiple access mode comprises:   determining, by the terminal device, according to the power adjustment indication information and a preset corresponding relationship, a target close loop power adjustment value corresponding to the target uplink multiple access mode, wherein the preset corresponding relationship is a corresponding relationship between the power adjustment indication information and a close loop power adjustment value.   
     
     
         6 . The method according to  claim 5 , wherein the determining, by the terminal device, according to the power adjustment indication information and a preset corresponding relationship, a target close loop power adjustment value corresponding to the target uplink multiple access mode comprises:
 determining, by the terminal device, according to the target uplink multiple access mode, a target corresponding relationship from the preset corresponding relationship; and   determining, by the terminal device, according to the power adjustment indication information and the target corresponding relationship, the target close loop power adjustment value.   
     
     
         7 . The method according to  claim 5 , wherein the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a first transmitting power, wherein the first transmitting power is a transmitting power that is used when the terminal device transmits an uplink signal having a same type as the target uplink signal at a previous time; or
 the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a second transmitting power, wherein the second transmitting power is a transmitting power that is used when the terminal device transmits an uplink signal having a same type as the target uplink signal using the target uplink multiple access mode at a previous time; or,   the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a third transmitting power, wherein the third transmitting power is a transmitting power of an uplink signal that has a same type as the target uplink signal and is most recently determined by the terminal device; or,   the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a fourth transmitting power, wherein the fourth transmitting power is a transmitting power of an uplink signal that is transmitted using the target uplink multiple access mode and has a same type as the target uplink signal and is most recently determined by the terminal device; or   the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a fifth transmitting power, wherein the fifth transmitting power is a transmitting power of the target uplink signal that is determined by the terminal device according to an open loop power control parameter corresponding to the target uplink multiple access mode.   
     
     
         8 . The method according to  claim 1 , further comprising:
 transmitting, by the terminal device, the target uplink signal to the network device by using the target uplink multiple access mode and the target transmitting power.   
     
     
         9 . The method according to  claim 1 , wherein the target uplink signal is one of the following signals: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), an SRS, and a demodulation reference signal (DMRS). 
     
     
         10 . The method according to  claim 1 , wherein the target uplink multiple access mode is one of the following multiple access modes: Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), Single-carrier Frequency Division Multiple Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA). 
     
     
         11 . A terminal device, comprising:
 a transceiver, configured to receive uplink power control information transmitted by a network device; and   a processor, configured to determine, according to the uplink power control information, a target power control parameter corresponding to a target uplink multiple access mode;   the processor is further configured to determine, according to the target power control parameter, a target transmitting power when transmitting a target uplink signal using the target uplink multiple access mode.   
     
     
         12 . The terminal device according to  claim 11 , wherein the target open loop power control parameter comprises at least one of the following parameters: an uplink target receiving power, a path loss factor, and a sounding reference signal (SRS) power adjustment value. 
     
     
         13 . The terminal device according to  claim 11 , wherein the uplink power control information comprises power adjustment indication information;
 the processor is specifically configured to determine, according to the power adjustment indication information and a preset corresponding relationship, a target close loop power adjustment value corresponding to the target uplink multiple access mode, wherein the preset corresponding relationship is a corresponding relationship between the power adjustment indication information and a close loop power adjustment value.   
     
     
         14 . The terminal device according to  claim 13 , wherein the processor is specifically configured to: determine, according to the target uplink multiple access mode, a target corresponding relationship from the preset corresponding relationship; and
 determine, according to the power adjustment indication information and the target corresponding relationship, the target close loop power adjustment value.   
     
     
         15 . The terminal device according to  claim 13 , wherein the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a first transmitting power, wherein the first transmitting power is a transmitting power that is used when the terminal device transmits an uplink signal having a same type as the target uplink signal at a previous time; or
 the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a second transmitting power, wherein the second transmitting power is a transmitting power that is used when the terminal device transmits an uplink signal having a same type as the target uplink signal using the target uplink multiple access mode at a previous time; or,   the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a third transmitting power, wherein the third transmitting power is a transmitting power of an uplink signal that has a same type as the target uplink signal and is most recently determined by the terminal device; or,   the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a fourth transmitting power, wherein the fourth transmitting power is a transmitting power of an uplink signal that is transmitted using the target uplink multiple access mode and has a same type as the target uplink signal and is most recently determined by the terminal device; or   the target close loop power adjustment value is an adjustment value of the target transmitting power relative to a fifth transmitting power, wherein the fifth transmitting power is transmitting power of the target uplink signal that is determined by the terminal device according to an open loop power control parameter corresponding to the target uplink multiple access mode.   
     
     
         16 . The terminal device according to  claim 11 , wherein the transceiver is further configured to transmit the target uplink signal to the network device by using the target uplink multiple access mode and the target transmitting power. 
     
     
         17 . The terminal device according to  claim 11 , wherein the target uplink signal is one of the following signals: a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), an SRS, and a demodulation reference signal (DMRS). 
     
     
         18 . The terminal device according to  claim 11 , wherein the target uplink multiple access mode is one of the following multiple access modes: Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM), Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), Single-carrier Frequency Division Multiple Access (SC-FDMA), and Orthogonal Frequency Division Multiple Access (OFDMA). 
     
     
         19 . A network device, comprising:
 a processor, configured to: determine uplink power control information, wherein the uplink power control information is used by the terminal device to determine a target power control parameter corresponding to a target uplink multiple access mode, and determine, according to the target power control parameter, a target transmitting power when transmitting a target uplink signal using the target uplink multiple access mode; and   a transceiver, configured to transmit the uplink power control information to the terminal device.   
     
     
         20 . The network device according to  claim 19 , wherein the uplink power control information comprises open loop power control information, the open loop power control information comprises open loop power control parameters corresponding to a plurality of uplink multiple access modes, the plurality of uplink multiple access modes comprise the target uplink multiple access mode, and the open loop power control information is used by the terminal device to determine a target open loop power control parameter corresponding to the target uplink multiple access mode in the open loop power control parameters.