# US 2019/0357153 A1 · Power Control Method and Terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357153 A1 - Document ID: US20190357153A1 - Status: Published application - Kind: A1 - Application number: 16/349,429 - Filed: 2017-01-12 - Published: 2019-11-21 - Earliest claimed: 2016-11-14 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Lili Zhang; Guorong Li; Hongcheng Zhuang; Richard Stirling-Gallacher - Web page: https://patentgrep.com/patent/US20190357153A1 ## CPC - H04W 52/146: {Uplink power control} - H04W 52/242: {taking into account path loss} - H04W 52/08: Closed loop power control - H04W 52/16: Deriving transmission power values from another channel - H04W 52/243: {taking into account interferences} - H04W 52/245: {taking into account received signal strength} - H04W 52/42: in systems with time, space, frequency or polarisation diversity - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Embodiments of the present invention provide a power control method and a terminal, so as to improve accuracy of transmit power used by the terminal during uplink transmission. The method includes: obtaining, by a first terminal, parameter information required for power control, where the parameter information includes at least one of a first parameter, a second parameter, and a third parameter; and determining, by the first terminal based on the parameter information, uplink transmit power used when uplink transmission is performed on a target beam or a target beam pair; where the first parameter includes a beam reception gain of a network device and/or a beam sending gain of the first terminal; the second parameter is used to indicate interference caused by a second terminal to the first terminal on the target beam; and the third parameter includes beam-specific target power and/or terminal-specific target power. ## Claims ### Claim 1 A power control method, comprising: obtaining, by a first terminal, parameter information required for power control, wherein the parameter information comprises at least one of a first parameter, a second parameter, and a third parameter; and determining, by the first terminal based on the parameter information, uplink transmit power used when uplink transmission is performed on a target beam or a target beam pair; wherein the first parameter comprises a beam reception gain of a network device and/or a beam sending gain of the first terminal; the second parameter comprises a value of interference caused by a second terminal to the first terminal on the target beam, and the second terminal includes one or more terminals other than the first terminal; and the third parameter comprises beam-specific target power and/or terminal-specific target power; and the beam-specific target power is a target power value that is set by the network device for the target beam or the target beam pair; and the terminal-specific target power is a target power value that is set by the network device for the first terminal on the target beam or the target beam pair. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first parameter further comprises a first compensation factor of the beam sending gain of the first terminal and/or a first compensation factor of the beam reception gain of the network device, and the first compensation factor is any value greater than or equal to 0 and less than or equal to 1. ### Claim 3 (depends on 1) The method according to claim 1, wherein the second parameter further comprises a second compensation factor of the interference value, and the second compensation factor is any value greater than or equal to 0 and less than or equal to 1; wherein the interference value is used to indicate interference that is detected by the network device on the target beam and that is caused by uplink transmission of the second terminal to uplink transmission of the first terminal. ### Claim 4 (depends on 1) The method according to claim 1, wherein the method further comprises: obtaining, by the first terminal, a fourth parameter, wherein the fourth parameter comprises a beam sending gain of the network device and/or a beam reception gain of the first terminal; wherein the determining, by the first terminal based on the parameter information, uplink transmit power used when uplink transmission is performed on a target beam or a target beam pair comprises: determining, by the first terminal, a path loss of the target beam or the target beam pair based on the fourth parameter; and determining, by the first terminal, the uplink transmit power based on the path loss and the parameter information by using a preset power control formula. ### Claim 5 (depends on 4) The method according to claim 4, wherein the determining, by the first terminal, a path loss of the target beam or the target beam pair based on the fourth parameter comprises: determining, by the first terminal, the path loss of the target beam or the target beam pair based on at least one of the following: transmit power of the network device, the beam sending gain of the network device in the fourth parameter, received signal strength of the first terminal, and the beam reception gain of the first terminal in the fourth parameter. ### Claim 6 (depends on 4) The method according to claim 4, wherein after the determining, by the first terminal, a path loss of the target beam or the target beam pair based on the fourth parameter, the method further comprises: correcting, by the first terminal, the path loss by using the first parameter, wherein the corrected path loss is a difference between the path loss and the first parameter before the correction. ### Claim 7 (depends on 1) The method according to claim 1, wherein the uplink transmission comprises at least one of transmission on a physical uplink shared channel PUSCH, transmission on a physical uplink control channel PUCCH, transmission on a physical random access channel PRACH, and transmission of a sounding reference signal SRS. ### Claim 8 (depends on 1) The method according to claim 1, wherein the first parameter is determined based on at least one of a service type of to-be-transmitted data, an uplink channel type, a width of the target beam, a number of a subframe, a number of the target beam, a number of the target beam pair, a number of a carrier, and a number of a subcarrier. ### Claim 9 (depends on 1) The method according to claim 1, wherein the parameter information further comprises a fifth parameter, and the fifth parameter is used to indicate an adjustment value of closed-loop power control for performing the uplink transmission on the target beam or the target beam pair; wherein the fifth parameter is a sum of an adjustment value and an offset that are used when power control is performed in a target subframe, and the target subframe is a subframe that is of a same type as a current subframe and that is followed by the current subframe. ### Claim 10 (depends on 1) The method according to claim 1, wherein the obtaining, by a first terminal, parameter information required for power control comprises: obtaining, by the first terminal, the parameter information by using at least one of radio resource control RRC signaling, Media Access Control MAC signaling, and physical layer signaling. ### Claim at position 11 -27. (canceled) ### Claim 28 A terminal, wherein the terminal is a first terminal, and the first terminal comprises: a processor, a memory, a bus, and a communications interface, wherein the processor is configured to obtain parameter information required for power control through the communications interface, wherein the parameter information comprises at least one of a first parameter, a second parameter, and a third parameter; and determine, based on the parameter information, uplink transmit power used when uplink transmission is performed on a target beam or a target beam pair; wherein the first parameter comprises a beam reception gain of a network device and/or a beam sending gain of the first terminal; the second parameter comprises a value of interference caused by a second terminal to the first terminal on the target beam, and the second terminal includes one or more terminals other than the first terminal; and the third parameter comprises a beam-specific target power and/or a terminal-specific target power; and the beam-specific target power is a target power value that is set by the network device for the target beam or the target beam pair; and the terminal-specific target power is a target power value that is set by the network device for the first terminal on the target beam or the target beam pair. ### Claim 29 (depends on 28) The first terminal according to claim 28, wherein the first parameter further comprises a first compensation factor of the beam sending gain of the first terminal and/or a first compensation factor of the beam reception gain of the network device, and the first compensation factor is any value greater than or equal to 0 and less than or equal to 1. ### Claim 30 (depends on 28) The first terminal according to claim 28, wherein the second parameter further comprises a second compensation factor of the interference value, and the second compensation factor is any value greater than or equal to 0 and less than or equal to 1; wherein the interference value is used to indicate interference that is detected by the network device on the target beam and that is caused by uplink transmission of the second terminal to uplink transmission of the first terminal. ### Claim 31 (depends on 28) The first terminal according to claim 28, wherein the processor is further configured to obtain a fourth parameter through the communications interface, wherein the fourth parameter comprises a beam sending gain of the network device and/or a beam reception gain of the first terminal; and the processor is specifically configured to: determine a path loss of the target beam or the target beam pair based on the fourth parameter; and determine the uplink transmit power based on the path loss and the parameter information by using a preset power control formula. ### Claim 32 (depends on 31) The first terminal according to claim 31, wherein the processor is specifically configured to determine the path loss of the target beam or the target beam pair based on at least one of the following: transmit power of the network device, the beam sending gain of the network device in the fourth parameter, received signal strength of the first terminal, and the beam reception gain of the first terminal in the fourth parameter. ### Claim 33 (canceled) ### Claim 34 (depends on 28) The first terminal according to claim 28, wherein the first parameter is determined based on at least one of a service type of to-be-transmitted data, an uplink channel type, a width of the target beam, a number of a subframe, a number of the target beam, a number of the target beam pair, a number of a carrier, and a number of a subcarrier. ### Claim 35 (depends on 28) The first terminal according to claim 28, wherein the parameter information further comprises a fifth parameter, and the fifth parameter is used to indicate an adjustment value of closed-loop power control for performing uplink transmission on the target beam or the target beam pair; wherein the fifth parameter is a sum of an adjustment value and an offset that are used when power control is performed in a target subframe, and the target subframe is a subframe that is of a same type as a current subframe and that is followed by the current subframe. ### Claim 36 (depends on 28) The first terminal according to claim 28, wherein the processor is specifically configured to obtain the parameter information by invoking the communications interface and by using at least one of radio resource control RRC signaling, Media Access Control MAC signaling, and physical layer signaling. ### Claim 37 (depends on 36) The first terminal according to claim 36, wherein the processor is specifically configured to: obtain the first parameter by invoking the communications interface and by using transmit power control TPC signaling in a physical downlink control channel PDCCH; or obtain the first parameter by using signaling used for the closed-loop power control. ### Claim 38 (canceled) ### Claim 39 (depends on 28) The first terminal according to claim 28, wherein the parameter information further comprises configuration information of target reference signal received power RSRP, and the configuration information of the target RSRP comprises duration of the target beam, a quantity of samples of the target beam, or information about instantaneous RSRP; and the processor is further configured to activate, based on the physical layer signaling sent by the network device, the target RSRP indicated by the configuration information of the target RSRP.