# US 12,225,472 B2 · Methods and systems of power control for uplink transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,472 B2 - Document ID: US12225472B2 - Status: Granted - Kind: B2 - Application number: 17/648,754 - Filed: 2022-01-24 - Published: 2022-05-12 - Granted: 2025-02-11 - Earliest claimed: 2017-06-16 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Zhengwei Gong; Amine Maaref; Kelvin Kar Kin Au; Mohammadhadi Baligh; Weimin Xiao - Web page: https://patentgrep.com/patent/US12225472B2 ## CPC - H04W 52/146: {Uplink power control} - H04W 52/242: {taking into account path loss} - H04W 52/325: {Power control of control or pilot channels} - H04W 52/42: in systems with time, space, frequency or polarisation diversity - H04W 52/245: {taking into account received signal strength} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for power control for uplink transmission is provided. In an embodiment, a method in a user equipment (UE) for reference signal (RS) relationship specific uplink (UL) transmission power control includes transmitting, by the UE, a first UL signal according to a first power control set including at least one of a first target power, a second target power, a DL reference signal (RS) for pathloss estimation, a pathloss compensation factor, and a transmit power command (TPC). The first power control set is determined according to a first RS relationship between one first RS and a first UL signal. ## Claims ### Claim 1 A method comprising: obtaining, by an apparatus, information of a reference signal (RS) relationship between an RS and a physical uplink (UL) channel; obtaining, by the apparatus, a power control set associated with the RS relationship, wherein the power control set includes a target power, a downlink (DL) RS for path-loss estimation, and a factor of a transmit power command; determining, by the apparatus, according to the RS relationship, a value of the target power, a value of the path-loss estimation corresponding to the DL RS, and a value of the transmit power command; and determining, by the apparatus, a transmit power for transmitting the physical UL channel based on the value of the target power, the value of the path-loss estimation and the value of the transmit power command. ### Claim 2 (depends on 1) The method of claim 1, wherein the physical UL channel is a physical UL control channel (PUCCH) or a physical UL shared channel (PUSCH). ### Claim 3 (depends on 1) The method of claim 1, wherein the target power is a user-equipment (UE)-specific target power. ### Claim 4 (depends on 1) The method of claim 1, wherein the RS relationship is a spatial relationship. ### Claim 5 (depends on 1) The method of claim 1, wherein the RS includes one of a synchronization signal (SS) block, a channel state information-reference signal (CSI-RS), or a sounding reference signal (SRS). ### Claim 6 (depends on 1) The method of claim 1, wherein information about the RS includes a resource index of the RS. ### Claim 7 (depends on 1) The method of claim 1, wherein the information of the RS relationship is indicated by using at least one of radio resource control (RRC) signaling or a Media Access Control (MAC) control element (CE). ### Claim 8 (depends on 1) The method of claim 1, wherein the transmit power is further related to a nominal partial power, and wherein the nominal partial power is independent of the RS relationship of the physical UL channel. ### Claim 9 (depends on 8) The method of claim 8, further comprising: receiving the nominal partial power over a broadcast channel. ### Claim 10 (depends on 1) The method of claim 1, further comprising: transmitting the physical UL channel according to the transmit power of the physical UL channel. ### Claim 11 An apparatus comprising: one or more processors in communication with a non-transitory storage medium storing instructions, wherein execution of the instructions by the one or more processors causes the one or more processors to: obtain information of a reference signal (RS) relationship between an RS and a physical uplink (UL) channel; obtain a power control set associated with the RS relationship, wherein the power control set includes a target power, a downlink (DL) RS for path-loss estimation, and a factor of a transmit power command; determine according to the RS relationship, a value of the target power, a value of the path-loss estimation corresponding to the DL RS, and a value of the transmit power command; and determine a transmit power for transmitting the physical UL channel based on the value of the target power, the value of the path-loss estimation and the value of the transmit power command. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the physical UL channel is a physical UL control channel (PUCCH) or a physical UL shared channel (PUSCH). ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the apparatus is a UE and the target power is a user-equipment (UE)-specific target power. ### Claim 14 (depends on 1) The method of claim 1, the information of the RS relationship including about the RS using a first beam of a first set of beams that is spatially associated with the physical UL channel. ### Claim 15 (depends on 11) The apparatus of claim 11, wherein the RS relationship is a spatial relationship. ### Claim 16 (depends on 11) The apparatus of claim 11, wherein the RS includes one of a synchronization signal (SS) block, a channel state information-reference signal (CSI-RS), or a sounding reference signal (SRS). ### Claim 17 (depends on 11) The apparatus of claim 11, wherein information about the RS includes a resource index of the RS. ### Claim 18 (depends on 11) The apparatus of claim 11, wherein the transmit power is further related to a nominal partial power, and wherein the nominal partial power is independent of the RS relationship of the physical UL channel. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the execution of the instructions by the one or more processors causes the one or more processors further to: receive the nominal partial power over a broadcast channel. ### Claim 20 (depends on 11) The apparatus of claim 11, wherein the execution of the instructions by the one or more processors causes the one or more processors further to: transmit the physical UL channel according to the transmit power of the physical UL channel. ### Claim 21 A method comprising: determining, by an apparatus, information of a reference signal (RS) relationship between an RS and a physical uplink (UL) channel, and a power control set associated with the RS relationship, wherein the power control set includes a target power, a DL RS for path-loss estimation, and a factor of a transmit power command; transmitting, by the apparatus, the information of the RS relationship and the power control set to a user equipment (UE); and receiving, by the apparatus, the physical UL channel from the UE, wherein a transmit power of the physical UL channel is obtained based on a value of the target power, a value of the path-loss estimation and a value of the transmit power command, and wherein the value of the target power, the value of the path-loss estimation corresponding to the DL RS, and the value of the transmit power command are determined based on the RS relationship. ### Claim 22 (depends on 21) The method of claim 21, wherein, the physical UL channel is a physical UL control channel (PUCCH) or a physical UL shared channel (PUSCH). ### Claim 23 (depends on 21) The method of claim 21, wherein the RS relationship is a spatial relationship. ### Claim 24 (depends on 21) The method of claim 21, wherein the RS includes one of a synchronization signal (SS) block, a channel state information-reference signal (CSI-RS), or a sounding reference signal (SRS). ### Claim 25 (depends on 21) The method of claim 21, wherein the transmit power is further related to a nominal partial power, and wherein he nominal partial power is independent of the RS relationship. ### Claim 26 A apparatus comprising: one or more processors in communication with a non-transitory storage medium storing instructions, wherein execution of the instructions by the one or more processors causes the one or more processors to: determine information of a reference signal (RS) relationship between an RS and a physical uplink (UL) channel, and a power control set associated with the RS relationship, wherein the power control set includes a target power, a downlink (DL) RS for path-loss estimation, and a factor of a transmit power command; transmit the information of the RS relationship and the power control set to a user equipment (UE); and receive the physical UL channel from the UE, wherein a transmit power of the physical UL channel is obtained based on a value of the target power, a value of the path-loss estimation and a value of the transmit power command, and wherein the value of the target power, the value of the path-loss estimation corresponding to the DL RS, and the value of the transmit power command are determined based on the RS relationship. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein, the physical UL channel is a physical UL control channel (PUCCH) or a physical UL shared channel (PUSCH). ### Claim 28 (depends on 26) The apparatus of claim 26, wherein the RS relationship is a spatial relationship. ### Claim 29 (depends on 26) The apparatus of claim 26, wherein the RS includes one of a synchronization signal (SS) block, a channel state information-reference signal (CSI-RS), or a sounding reference signal (SRS). ### Claim 30 (depends on 26) The apparatus of claim 26, wherein the transmit power is further related to a nominal partial power, and wherein the nominal partial power is independent of the RS relationship. ### Claim 31 A non-transitory computer-readable medium having instructions stored thereon that, when executed by an apparatus, cause the apparatus to perform operations, the operations comprising: obtaining information of a reference signal (RS) relationship between an RS and a physical uplink (UL) channel; obtaining a power control set associated with the RS relationship, wherein the power control set includes a target power, a downlink (DL) RS for path-loss estimation, and a factor of a transmit power command; determining according to the RS relationship, a value of the target power, a value of the path-loss estimation corresponding to the DL RS, and a value of the transmit power command; and determining a transmit power for transmitting the physical UL channel based on the value of the target power, the value of the path-loss estimation and the value of the transmit power command.