# US 12,192,915 B2 · User equipment and wireless communication method for power control of sidelink channel transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,915 B2 - Document ID: US12192915B2 - Status: Granted - Kind: B2 - Application number: 17/441,227 - Filed: 2019-03-28 - Published: 2022-05-19 - Granted: 2025-01-07 - Earliest claimed: 2019-03-28 - Assignees: Panasonic Intellectual Property Corporation of America - Applicants: Panasonic Intellectual Property Corporation of America - Inventors: Lilei Wang; Hidetoshi Suzuki - Web page: https://patentgrep.com/patent/US12192915B2 ## CPC - H04W 52/242: {taking into account path loss} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 52/383: {power control in peer-to-peer links} - H04W 52/54: Signalisation aspects of the TPC commands, e.g. frame structure - H04W 92/18: between terminal devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Provided are user equipment and wireless communication methods related to power control of sidelink transmissions and any other sidelink operation in NR V2X. The user equipment, comprising: a receiver, operative to receive indication information of power determination basis for sidelink transmission, the indication information indicating a set of downlink reference signal(s) for determining pathloss used for power control of a sidelink channel to be transmitted by the user equipment or that the pathloss for power control of the sidelink channel is determined based on sidelink reference signal(s); and a circuitry, operative to determine the pathloss used for power control of the sidelink channel based on the indication information. ## Claims ### Claim 1 A user equipment, comprising: a receiver, which, in operation, receives indication information of power control for a transmission of a sidelink channel, the indication information indicating that (i) in a first case, a sidelink reference signal is used for a determination of pathloss used for the power control of the sidelink channel, and (ii) in a second case, a downlink reference signal is used for the determination of the pathloss; and circuitry, which, in operation, determines the pathloss based on the sidelink reference signal in the first case, and determines the pathloss based on a single downlink reference signal determined from a plurality of downlink reference signals in the second case, the plurality of downlink reference signals associated with a plurality of beams, wherein a parameter P0 and a parameter alpha, which are used for the power control of the sidelink channel, are common between the plurality of beams. ### Claim 2 (depends on 1) The user equipment according to claim 1, wherein the indication information is transmitted through Downlink Control Information (DCI), Radio Resource Control (RRC) information, Medium Access Control (MAC) information or any combination of them. ### Claim 3 (depends on 1) The user equipment according to claim 1, wherein the plurality of downlink reference signals comprise a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS). ### Claim 4 (depends on 3) The user equipment according to claim 3, wherein the Primary Synchronization Signal (PSS) and/or the Secondary Synchronization Signal (SSS) in the plurality of downlink reference signals are from one or more downlink beams. ### Claim 5 (depends on 1) The user equipment according to claim 1, wherein the indication information indicates the power control for a Physical Sidelink Feedback Channel (PSFCH) separately from the power control for a Physical Sidelink Shared Channel (PSSCH). ### Claim 6 (depends on 1) The user equipment according to claim 1, wherein a power of a Physical Sidelink Control Channel (PSCCH) is determined based on a power of a Physical Sidelink Shared Channel (PSSCH). ### Claim 7 (depends on 1) The user equipment according to claim 1, wherein the parameters P0 and alpha are different between the first case and the second case. ### Claim 8 A communication method, comprising: receiving indication information of power control for a transmission of a sidelink channel, the indication information indicating that (i) in a first case, a sidelink reference signal is used for a determination of pathloss used for the power control of the sidelink channel, and (ii) in a second case, a downlink reference signal is used for the determination of the pathloss; and determining the pathloss based on the sidelink reference signal in the first case, and determining the pathloss based on a single downlink reference signal determined from a plurality of downlink reference signals in the second case, the plurality of downlink reference signals associated with a plurality of beams, wherein a parameter P0 and a parameter alpha, which are used for the power control of the sidelink channel, are common between the plurality of beams. ### Claim 9 (depends on 8) The communication method according to claim 8, wherein the indication information is transmitted through Downlink Control Information (DCI), Radio Resource Control (RRC) information, Medium Access Control (MAC) information or any combination of them. ### Claim 10 (depends on 8) The communication method according to claim 8, wherein the plurality of downlink reference signals comprise a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS). ### Claim 11 (depends on 10) The communication method according to claim 10, wherein the Primary Synchronization Signal (PSS) and/or the Secondary Synchronization Signal (SSS) in the plurality of downlink reference signals are from one or more downlink beams. ### Claim 12 (depends on 8) The communication method according to claim 8, wherein the indication information indicates the power control for a Physical Sidelink Feedback Channel (PSFCH) separately from the power control for a Physical Sidelink Shared Channel (PSSCH). ### Claim 13 (depends on 8) The communication method according to claim 8, wherein a power of a Physical Sidelink Control Channel (PSCCH) is determined based on a power of a Physical Sidelink Shared Channel (PSSCH). ### Claim 14 (depends on 8) The communication method according to claim 8, wherein the parameters of P0 and alpha are different between the first case and the second case.