# US 12,120,614 B2 · Beam based power control for sidelink > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,614 B2 - Document ID: US12120614B2 - Status: Granted - Kind: B2 - Application number: 17/457,883 - Filed: 2021-12-06 - Published: 2023-06-08 - Granted: 2024-10-15 - Earliest claimed: 2021-12-06 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Hua Wang; Sony Akkarakaran; Tao Luo; Junyi Li; Yan Zhou; Hong Cheng; Jelena Damnjanovic; Peter Gaal; Jung Ho Ryu - Web page: https://patentgrep.com/patent/US12120614B2 ## CPC - H04W 52/14: Separate analysis of uplink or downlink - H04W 52/383: {power control in peer-to-peer links} - H04W 16/28: using beam steering - H04W 52/0245: {according to signal strength} - H04W 52/242: {taking into account path loss} - H04W 52/42: in systems with time, space, frequency or polarisation diversity - H04W 76/14: Direct-mode setup - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Method and apparatus to determine a sidelink beam and associated power control parameter for sidelink communication. The apparatus initiates a beam pairing with a second UE, the first UE being a transmitting UE and the second UE being a receiving UE. The apparatus identifies a sidelink beam from a plurality of sidelink beams and at least one power control parameter for sidelink communication with the second UE. Different sidelink beams use different power control parameters. The apparatus communicates with the second UE via a selected sidelink beam and the at least one power control parameter. ## Claims ### Claim 1 An apparatus for wireless communication at a first user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: initiate a beam pairing with a second UE, the first UE being a transmitting UE and the second UE being a receiving UE; identify a sidelink beam from a plurality of sidelink beams and at least one power control parameter for sidelink communication with the second UE, wherein different sidelink beams use different power control parameters; receive, from the second UE, a reference signal received power (RSRP) report comprising a CSI-RS resource indicator (CRI) and an associated RSRP, wherein a sidelink path loss is calculated based on the RSRP report; and communicate with the second UE via a selected sidelink beam and the at least one power control parameter. ### Claim 2 (depends on 1) The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the at least one power control parameter comprises at least one of a sidelink path loss reference signal, the sidelink path loss for power control, or a sidelink p0 and a sidelink alpha for the power control. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein a setting of the sidelink path loss reference signal is associated with a sidelink transmission configuration indicator (TCI) state. ### Claim 5 (depends on 3) The apparatus of claim 3, wherein a setting of the sidelink p0 or the sidelink alpha are associated with a sidelink transmission configuration indicator (TCI) state. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the at least one power control parameter is configured via radio resource control (RRC) signaling or medium access control (MAC) control element (CE) (MAC-CE). ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to: receive a configuration of the at least one power control parameter for the sidelink communication. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to: calculate a reference signal power of at least one beam from a plurality of beams based on a sidelink reference signal. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the plurality of beams are filtered if different beams have different transmission power. ### Claim 10 (depends on 8) The apparatus of claim 8, wherein a set of sidelink beams having similar properties are comprised within a beam group of a plurality of beam groups, wherein a filtering of beams is based on the plurality of beam groups. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to: transmit, to the second UE, at least one sidelink reference signal, wherein a sidelink transmission beam and a transmission power are selected based on the at least one sidelink reference signal. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the at least one sidelink reference signal comprises a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB). ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the RSRP report comprising the CRI and the associated RSRP is based on the at least one sidelink reference signal received at the second UE. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the sidelink transmission beam and transmission control parameters are based at least on the RSRP report. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein the at least one processor is further configured to: receive, from the second UE, an indication to set the sidelink transmission beam, wherein the first UE selects transmission power control parameters based at least on the RSRP report. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein the at least one processor is further configured to: receive, from the second UE, an indication to set the sidelink transmission beam and transmission power control parameters. ### Claim 17 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to: receive, from the second UE, a sidelink reference signal and a corresponding transmission power, wherein a sidelink transmission beam and a transmission power are selected based at least on the sidelink reference signal. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the sidelink transmission beam is based on a sidelink reference signal index and associated sidelink path loss. ### Claim 19 (depends on 17) The apparatus of claim 17, wherein the at least one processor is further configured to: transmit, to the second UE, the CRI; and receive, from the second UE, an indication to set the sidelink transmission beam based on the CRI. ### Claim 20 (depends on 1) The apparatus of claim 1, wherein the at least one processor is further configured to: transmit, to the second UE, at least one physical sidelink shared channel (PSSCH); and receive, from the second UE, the RSRP report comprising a PSCCH beam index and the associated RSRP based on the at least one PSSCH, wherein a sidelink transmission beam and a transmission power are selected based on RSRP report. ### Claim 21 A method of wireless communication at a first user equipment (UE), comprising: initiating a beam pairing with a second UE, the first UE being a transmitting UE and the second UE being a receiving UE; identifying a sidelink beam from a plurality of sidelink beams and at least one power control parameter for sidelink communication with the second UE, wherein different sidelink beams use different power control parameters; receiving, from the second UE, a reference signal received power (RSRP) report comprising a CSI-RS resource indicator (CRI) and an associated RSRP, wherein a sidelink path loss is calculated based on the RSRP report; and communicating with the second UE via a selected sidelink beam and the at least one power control parameter. ### Claim 22 An apparatus for wireless communication at a second user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: receive a request for initiating a beam pairing with a first UE, the first UE being a transmitting UE and the second UE being a receiving UE; transmit or receiving one or more sidelink reference signals to determine a sidelink beam and associated power control parameters for sidelink communication with the first UE, wherein different sidelink beams use different power control parameters; transmit, to the first UE, a reference signal received power (RSRP) report comprising a CSI-RS resource indicator (CRI) and an associated RSRP, wherein a sidelink path loss is calculated based on the RSRP report; and communicate with the first UE via the sidelink beam and the associated power control parameters. ### Claim 23 (depends on 22) The apparatus of claim 22, further comprising a transceiver coupled to the at least one processor. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the at least one processor is further configured to: receive, from the first UE, at least one sidelink reference signal, wherein a sidelink transmission beam and a transmission power are selected based on the at least one sidelink reference signal. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the at least one sidelink reference signal comprises a channel state information reference signal (CSI-RS) or a synchronization signal block (SSB). ### Claim 26 (depends on 24) The apparatus of claim 24, wherein the RSRP report comprising the CRI and the associated RSRP is based on the at least one sidelink reference signal received at the second UE. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the at least one processor is further configured to: transmit, to the first UE, an indication to set the sidelink transmission beam, wherein the first UE selects transmission power control parameters based at least on the RSRP report. ### Claim 28 (depends on 22) The apparatus of claim 22, wherein the at least one processor is further configured to: transmit, to the first UE, a sidelink reference signal and a corresponding transmission power, wherein a sidelink transmission beam and a transmission power are selected based at least on the sidelink reference signal. ### Claim 29 (depends on 22) The apparatus of claim 22, wherein the at least one processor is further configured to: receive, from the first UE, at least one physical sidelink shared channel (PSSCH); and transmit, to the first UE, the RSRP report comprising a physical sidelink control channel (PSCCH) beam index and the associated RSRP based on the at least one PSSCH, wherein a sidelink transmission beam and a transmission power are selected based on RSRP report. ### Claim 30 A method of wireless communication at a second user equipment (UE), comprising: receiving a request for initiating a beam pairing with a first UE, the first UE being a transmitting UE and the second UE being a receiving UE; transmitting or receiving one or more sidelink reference signals to determine a sidelink beam and associated power control parameters for sidelink communication with the first UE, wherein different sidelink beams use different power control parameters; transmitting, to the first UE, a reference signal received power (RSRP) report comprising a CSI-RS resource indicator (CRI) and an associated RSRP, wherein a sidelink path loss is calculated based on the RSRP report; and communicating with the first UE via the sidelink beam and the associated power control parameters.