# US 12,225,476 B2 · Power adjustment method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,476 B2 - Document ID: US12225476B2 - Status: Granted - Kind: B2 - Application number: 17/707,293 - Filed: 2022-03-29 - Published: 2022-07-14 - Granted: 2025-02-11 - Earliest claimed: 2019-09-30 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Peng Guan; Xi Zhang - Web page: https://patentgrep.com/patent/US12225476B2 ## CPC - H04W 52/242: {taking into account path loss} - H04B 7/0617: {for beam forming} - H04B 7/086: {using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming} - H04W 52/146: {Uplink power control} - H04W 52/54: Signalisation aspects of the TPC commands, e.g. frame structure - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A power adjustment method and an apparatus are provided, to improve stability of transmit power of an uplink signal, so that the uplink signal can be effectively transmitted. The method includes: receiving a MAC CE (201), where the MAC CE is used to update a pathloss estimation reference signal; and determining a pathloss estimation value based on the pathloss estimation reference signal (202), where an effective time of the pathloss estimation value is not later than n+X+T, n is a time for sending feedback information, the feedback information is used to feed back whether the MAC CE is correctly received, X is fixed duration, and T is variable duration. It can be learned that the effective time of the pathloss estimation value is not later than n+X+T. ## Claims ### Claim 1 A power adjustment method, wherein the method comprises: receiving a medium access control control element (MAC CE), wherein the MAC CE is configured to update a pathloss estimation reference signal; determining a pathloss estimation value based on the pathloss estimation reference signal, wherein an application time of the pathloss estimation value is no later than n+X+T, where n is a time for sending feedback information indicating whether the MAC CE is correctly received, X is a fixed duration, T is a variable duration, and X and T are finite non-zero values; and determining transmit power of an uplink signal based on the pathloss estimation value. ### Claim 2 (depends on 1) The method according to claim 1, wherein the method further comprises: sending the uplink signal at the determined transmit power after the pathloss estimation value takes effect. ### Claim 3 (depends on 1) The method according to claim 1, wherein T is related to high-layer filtering capability information of a terminal device. ### Claim 4 (depends on 3) The method according to claim 3, wherein the higher-layer filtering capability information comprises at least one of higher-layer filtering configuration information, a quantity of measurements, a measurement periodicity, a measurement setting, or time domain information of the pathloss estimation reference signal; and the quantity of measurements is a quantity of measurements of receive power of the pathloss estimation reference signal, the measurement periodicity is a transmission periodicity of the pathloss estimation reference signal, and the measurement setting is a setting related to the pathloss estimation reference signal. ### Claim 5 (depends on 3) The method according to claim 3, wherein T is a sum of a duration in which the terminal device performs higher-layer filtering, and a duration in which the terminal device determines the transmit power of the uplink signal based on the pathloss estimation value. ### Claim 6 (depends on 1) The method according to claim 1, wherein the effective application time of the pathloss estimation value is not earlier than n+X. ### Claim 7 (depends on 1) The method according to claim 1, wherein the MAC CE comprises information about the pathloss estimation reference signal. ### Claim 8 (depends on 7) The method according to claim 7, wherein the MAC CE further comprises a parameter related to the transmit power of the uplink signal, and the parameter related to the transmit power of the uplink signal comprises at least one of target power, a pathloss compensation factor, or a power adjustment parameter. ### Claim 9 (depends on 8) The method according to claim 8, wherein an application time of the parameter related to the transmit power of the uplink signal is no later than n+X, or an application time of the parameter related to the transmit power of the uplink signal is no later than n+X+T. ### Claim 10 A communications apparatus, comprising: a receiver, configured to receive a medium access control control element (MAC CE), wherein the MAC CE is configured to update a pathloss estimation reference signal; and a processor, configured to determine a pathloss estimation value based on the pathloss estimation reference signal, wherein an application time of the pathloss estimation value is no later than n+X+T, where n is a time for sending feedback information indicating whether the MAC CE is correctly received, X is a fixed duration, T is a variable duration, and X and T are finite non-zero values, and determine transmit power of an uplink signal based on the pathloss estimation value. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein the apparatus further comprises: a transmitter, configured to send the uplink signal at the determined transmit power after the pathloss estimation value takes effect. ### Claim 12 (depends on 10) The apparatus according to claim 10, wherein T is related to high-layer filtering capability information of a terminal device. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein the higher-layer filtering capability information comprises at least one of higher-layer filtering configuration information, a quantity of measurements, a measurement periodicity, a measurement setting, or time domain information of the pathloss estimation reference signal; and the quantity of measurements is a quantity of measurements of receive power of the pathloss estimation reference signal, the measurement periodicity is a transmission periodicity of the pathloss estimation reference signal, and the measurement setting is a setting related to the pathloss estimation reference signal. ### Claim 14 (depends on 12) The apparatus according to claim 12, wherein T is a sum of a duration in which the terminal device performs higher-layer filtering, and a duration in which the terminal device determines the transmit power of the uplink signal based on the pathloss estimation value. ### Claim 15 (depends on 10) The apparatus according to claim 10, wherein the application time of the pathloss estimation value is not earlier than n+X. ### Claim 16 (depends on 10) The apparatus according to claim 10, wherein the MAC CE comprises information about the pathloss estimation reference signal. ### Claim 17 (depends on 16) The apparatus according to claim 16, wherein the MAC CE further comprises a parameter related to the transmit power of the uplink signal, and the parameter related to the transmit power of the uplink signal comprises at least one of target power, a pathloss compensation factor, or a power adjustment parameter. ### Claim 18 (depends on 17) The apparatus according to claim 17, wherein an application time of the parameter related to the transmit power of the uplink signal is no later than n+X, or an application time of the parameter related to the transmit power of the uplink signal is no later than n+X+T. ### Claim 19 A non-transitory computer-readable storage medium, storing a computer-executable program, which when executed by a processor, causes the processor to implement operations comprising: receiving a medium access control control element (MAC CE), wherein the MAC CE is configured to update a pathloss estimation reference signal; determining a pathloss estimation value based on the pathloss estimation reference signal, wherein an application time of the pathloss estimation value is no later than n+X+T, where n is a time for sending feedback information indicating whether the MAC CE is correctly received, X is a fixed duration, T is a variable duration, and X and T are finite non-zero values; and determining transmit power of an uplink signal based on the pathloss estimation value. ### Claim 20 (depends on 19) The non-transitory computer-readable storage medium according to claim 19, wherein the operations further comprise: sending the uplink signal at the determined transmit power after the pathloss estimation value takes effect.