# US 11,121,840 B2 · Method for reporting power headroom for SRS, terminal device, and computer storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,840 B2 - Document ID: US11121840B2 - Status: Granted - Kind: B2 - Application number: 16/988,416 - Filed: 2020-08-07 - Published: 2020-11-26 - Granted: 2021-09-14 - Earliest claimed: 2018-03-07 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Wenhong Chen; Zhihua Shi - Web page: https://patentgrep.com/patent/US11121840B2 ## CPC - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W 52/146: {Uplink power control} - H04W 52/325: {Power control of control or pilot channels} - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W 52/365: {Power headroom reporting} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/54: based on quality criteria - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 reporting PH for an SRS, terminal device and computer storage medium are provided. The method includes: the terminal device calculates at least one expected SRS transmit power on at least one SRS resource in a target SRS resource set, the target SRS resource set is an SRS resource set on a target BWP; when the terminal device does not transmit an SRS on the target BWP at a moment of calculating the PH, the target SRS resource set is an SRS resource set with a lowest set index on the target BWP; the terminal device obtains the PH of the target SRS resource set through calculation according to the at least one expected SRS transmit power on the at least one SRS resource; and the terminal device reports the PH of the target SRS resource set obtained through calculation. ## Claims ### Claim 1 A method for reporting power headroom (PH) for a sounding reference signal (SRS), the method comprising: calculating, by a terminal device, at least one expected SRS transmit power on at least one SRS resource comprised in a target SRS resource set, wherein the target SRS resource set is an SR.S resource set on a target bandwidth part (BWP) and the at least one SRS resource comprised in the target SRS resource set comprises multiple SRS resources; when the terminal device does not, transmit an SRS on the target BWP at a moment of calculating the PH, the target SRS resource set is an SRS resource set with a minimum set index among multiple SRS resource sets on the target BWP; obtaining, by the terminal device, the PH of the target SRS resource set through calculation according to the at least one expected SRS transmit power on the at least one SRS resource; and reporting, by the terminal device, the PH of the target SRS resource set obtained through calculation. ### Claim 2 The method according to claim I, wherein the calculating, by the terminal device, at least one expected SRS transmit power on at least one SRS resource comprised in a target SRS resource set comprises: if the terminal device transmits an SRS on an SRS resource at a moment of calculating the PH, calculating, by the terminal device, an expected. SRS transmit power on the SRS resource based on a transmission parameter of the transmitted SRS and a power control parameter configured for the SRS resource or the target SRS resource set. ### Claim 3 The method according to claim I, wherein the calculating, by the terminal device, at least one expected SRS transmit power on at least one SRS resource comprised in a target SRS resource set comprises: if the terminal device does not transmit an SRS on an SRS resource at a moment of calculating the PH, calculating, by the terminal device, an expected SRS transmit power on the SRS resource based on a power controlparameter configured for the SRS resource or the target SRS resource set. ### Claim 4 (depends on 1) The method according to claim 1, wherein the at least one SRS resource is one of the following: at least one SRS resource occupying a same orthogonal frequency division multiplexing (OFDM) symbol in the target SRS resource set; at least one SRS resource occupying different OFDM symbols in the target SRS resource set; at least one SRS resource occupying different bandwidths in the target SRS resource set; at least one SRS resource using different antenna array groups to transmit an SRS in the target SRS resource set; and at least one SRS resource using a same antenna array group to transmit an SRS in the target SRS resource set. ### Claim 5 (depends on 1) The method according to claim 1, wherein: when the target SRS resource set is used for uplink non-codebook transmission, the at least one SRS resource is all SRS resources in the target SRS resource set. ### Claim 6 (depends on 1) The method according to claim 1, wherein: when the target SRS resource set is used for uplink codebook transmission, beam management, or antenna switching, the at least one SRS resource is any SRS resource in the target SRS resource set. ### Claim 7 (depends on 1) The method according to claim 1, wherein: when the terminal device transmits an SRS on the target BWP at a moment of calculating the PH, or the target BWP is a currently activated BWP, the target SRS resource set is an SRS resource set currently used for SRS transmission on the target BMP, or the target SRS resource set is an SRS resource set associated with current physical uplink shared channel (PUSCH) transmission. ### Claim 8 (depends on 1) The method according to claim 1, wherein the obtaining, by the terminal device, the PH of the target SRS resource set through calculation according to the at least one expected SRS transmit power on the at least one SRS resource comprises: using, by the terminal device, a difference between a maximum transmit power and a sum of the at least one expected SRS transmit power on the at least one SRS resource as the PH of the target SRS resource set. ### Claim 9 (depends on 8) The method according to claim 8, wherein: the at least one SRS resource occupies a same orthogonal frequency division multiplexing (OFDM) symbol; or the at least one SRS resource uses a same antenna array group to transmit an SRS. ### Claim 10 A terminal device, comprising: a processor and a memory configured to store computer-executable instructions that, when executed by the processor, cause the processor to perform operations of: calculating at least one expected sounding reference signal (SRS) transmit power on at least one SRS resource comprised in a target SRS resource set, wherein the target SRS resource set is an SRS resource set on a target bandwidth part (BWP) and the at least one SRS resource comprised in the target SRS resource set comprises multiple SRS resources; when the terminal device does not transmit an SRS on the target BWP at a moment of calculating power headroom (PH), the target SRS resource set is an SRS resource set with a minimum set index among multiple SRS resource sets on the target BWP; obtaining the PH of the target SRS resource set through calculation according to the at least one expected SRS transmit power on the at least one SRS resource; and reporting the PH of the target SRS resource set obtained through calculation. ### Claim 11 (depends on 10) The terminal device according to claim 10, wherein if the terminal device transmits an SRS on an SRS resource at a moment of calculating the PH, the processor is configure to calculate an expected. SRS transmit power on the SRS resource based on a transmission parameter of the transmitted SRS and a power control parameter configured for the SRS resource or the target SRS resource set. ### Claim 12 (depends on 10) The terminal device according to claim 10, wherein if the terminal device does not transmit an SRS on an SRS resource at a moment of calculating the PH, the processor is configured to calculate an expected SRS transmit power on the SRS resource based on a power control parameter configured for the SRS resource or the target SRS resource set. ### Claim 13 (depends on 10) The terminal device according to claim 10, wherein the at least one SRS resource is one of the following: at least one SR.S resource occupying a same orthogonal frequency division multiplexing (OFDM) symbol in the target SRS resource set; at least one SRS resource occupying different OFDM symbols in the target SRS resource set; at least one SRS resource occupying different bandwidths in the target SRS resource set; at least one SRS resource using different antenna array groups to transmit an SRS in the target SRS resource set; and at least one SRS resource using a same antenna array group to transmit an SRS in the target SRS resource set. ### Claim 14 (depends on 10) The terminal device according to claim 10, wherein when the target SRS resource set is used for uplink non-codebook transmission, the at least one SRS resource is all SRS resources in the target SRS resource set. ### Claim 15 (depends on 10) The terminal device according to claim 10, wherein when the target SRS resource set is used for uplink codebook transmission, beam management, or antenna switching, the at least one SRS resource is any SRS resource in the target SRS resource set. ### Claim 16 (depends on 10) The terminal device according to claim 10, wherein when the terminal device transmits an SRS on the target BWP at a moment of calculating the PH, or the target BWP is a currently activated BWP, the target SRS resource set is an SRS resource set currently used for SRS transmission on the target BWP, or the target SRS resource set is an SRS resource set associated with current physical uplink shared channel (PUSCH) transmission. ### Claim 17 (depends on 10) The terminal device according to claim 10, wherein the processor is configured to use a difference between a maximum transmit power and a sum of the at least one expected SRS transmit power on the at least one SRS resource as the PH of the target SRS resource set. ### Claim 18 (depends on 17) The terminal device according to claim 17, wherein: the at least one SRS resource occupies a same orthogonal frequency division multiplexing (OFDM) symbol; or the at least one SRS resource uses a same antenna array group to transmit an SRS. ### Claim 19 A non-transitory computer storage medium, having stored thereon computer-executable instructions, that when executed by a processor of a terminal device, cause the terminal device to perform a method for reporting power headroom (PH) for a sounding reference signal (SRS), the method comprising: calculating, by the terminal device, at least one expected SRS transmit power on at least one SRS resource comprised in a target SRS resource set, wherein the target SRS resource set is an SRS resource set on a target bandwidth part (BWP) and the at least one SRS resource comprised in the target SRS resource set comprises multiple SRS resources; when the terminal device does not transmit an SRS on the target BWP at a moment of calculating the PH, the target SRS resource set is an SRS resource set with a minimum set index among multiple SRS resource sets on the target BWP; obtaining, by the terminal device, the PH of the target SRS resource set through calculation according to the at least one expected SRS transmit power on the at least one SRS resource; and reporting, by the terminal device, the PH of the target SRS resource set obtained through calculation. ### Claim 20 (depends on 19) The non-transitory computer storage medium according to claim 19, wherein the calculating, by the terminal device, at least one expected SRS transmit power on at least one SRS resource comprised in a target SRS resource set comprises: if the terminal device transmits an SRS on an SRS resource at a moment of calculating the PH, calculating, by the terminal device, an expected SRS transmit power on the SRS resource based on a transmission parameter of the transmitted SRS and a power control parameter configured for the SRS resource or the target SRS resource set.