# US 12,114,317 B2 · Sidelink channel state information (CSI) reporting from a user equipment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,317 B2 - Document ID: US12114317B2 - Status: Granted - Kind: B2 - Application number: 17/158,463 - Filed: 2021-01-26 - Published: 2022-07-28 - Granted: 2024-10-08 - Earliest claimed: 2021-01-26 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Chih-Hao Liu; Yisheng Xue; Jing Sun; Xiaoxia Zhang; Shuanshuan Wu; Rajat Prakash; Sony Akkarakaran; Piyush Gupta - Web page: https://patentgrep.com/patent/US12114317B2 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04W 88/04: adapted for relaying to or from another terminal or user - 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) - H04B: TRANSMISSION ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmit (Tx) user equipment (UE) may receive, from a base station, downlink control information (DCI) that triggers sidelink channel state information (CSI) reporting from a receive (Rx) UE to the Tx UE. The Tx UE may transmit, to the Rx UE, a request for CSI based at least in part on the DCI received from the base station. The Tx UE may receive, from the Rx UE, a CSI report based at least in part on the request. The Tx UE may transmit, to the base station, the CSI report received from the Rx UE. Numerous other aspects are described. ## Claims ### Claim 1 A method of wireless communication performed by a transmit (Tx) user equipment (UE), comprising: receiving, in a first downlink control information (DCI) 3_0 and from a network node, an uplink grant associated with enabling reporting of a particular channel state information (CSI) report, associated with a receive (Rx) UE, to the network node, wherein the uplink grant indicates a destination identifier, associated with the Tx UE, indicating the particular CSI report; transmitting, to the Rx UE and based at least in part on the first DCI 3_0, a request, for the particular CSI report, indicating the destination identifier; receiving, from the Rx UE and based at least in part on transmitting the request, the particular CSI report; adding, based at least in part on receiving the particular CSI report, a receiver identifier, identifying the Rx UE, to the particular CSI report; and transmitting, to the network node and based on adding the receiver identifier to the particular CSI report, the particular CSI report, wherein the particular CSI report is transmitted to the network node via a scheduling request procedure based at least in part on whether any uplink grant is available for the Tx UE to transmit the particular CSI report to the network node. ### Claim 2 (depends on 1) The method of claim 1, wherein the first DCI 3_0 includes a sidelink grant for the Rx UE to transmit the particular CSI report to the Tx UE, and wherein the request comprises sidelink information that includes the sidelink grant. ### Claim 3 (depends on 1) The method of claim 1, wherein the particular CSI report is transmitted to the network node independent of the scheduling request procedure based at least in part on receiving the uplink grant. ### Claim 4 (depends on 1) The method of claim 1, wherein the first DCI 3_0 indicates the uplink grant. ### Claim 5 (depends on 1) The method of claim 1, further comprising: transmitting, to the Rx UE, an indication of the destination identifier associated with the Tx UE, wherein the particular CSI report is received from the Rx UE further based at least in part on transmitting the indication. ### Claim 6 (depends on 1) The method of claim 1, wherein the particular CSI report is a medium access control control element (MAC-CE) CSI report. ### Claim 7 (depends on 1) The method of claim 1, wherein the Tx UE is in coverage with the network node and the Rx UE is in coverage with the network node. ### Claim 8 (depends on 1) The method of claim 1, wherein the Tx UE is in coverage with the network node and the Rx UE is out-of-coverage with the network node. ### Claim 9 (depends on 1) The method of claim 1, wherein the request is transmitted to the Rx UE using time/frequency resources that are based at least in part on the first DCI 3_0. ### Claim 10 (depends on 1) The method of claim 1, wherein receiving the CSI report is further based at least in part on a second DCI indicating a sidelink grant for the RX UE to transmit the particular CSI report to the Tx UE. ### Claim 11 (depends on 1) The method of claim 1, wherein the request for the particular CSI report is associated with a channel state information reference signal (CSI-RS). ### Claim 12 (depends on 1) The method of claim 1, further comprising: transmitting an indication of a cell identifier associated with the Tx UE, wherein the particular CSI report is further received based at least in part on the cell identifier. ### Claim 13 (depends on 12) The method of claim 12, wherein the indication of the cell identifier is transmitted via sidelink control information or L2 signaling. ### Claim 14 A method of wireless communication performed by a receive (Rx) user equipment (UE), comprising: receiving, in a first downlink control information (DCI) 3_0 and from a network node, an uplink grant associated with enabling reporting of a particular channel state information (CSI) report, associated with a transmit (Tx) UE, directly to the network node via the uplink grant; receiving, in a second DCI 3_0 and from the Tx UE, sidelink control information (SCI) comprising the uplink grant for the particular CSI report to be transmitted to the TX UE via the uplink grant in a payload of the SCI; identifying, based at least in part on a destination identifier included in the uplink grant of at least one of the first DCI 3_0 or the second DCI 3_0, the particular CSI report of a plurality of CSI reports, associated with a plurality of Tx UEs including the Tx UE, stored at the Rx UE; and transmitting, directly to the network node and based at least in part on receiving the uplink grant and the SCI and identifying the particular CSI report, the particular CSI report, wherein the particular CSI report is transmitted directly to the network node via a scheduling request procedure based at least in part on whether any uplink grant is available for the Rx UE to transmit the particular CSI report to the network node. ### Claim 15 (depends on 14) The method of claim 14, wherein at least one of the first DCI 3_0 or the second DCI 3_0 further includes a sidelink grant for the Rx UE to transmit the particular CSI to the Tx UE, and the method further comprising: transmitting, directly to the Tx UE and based at least in part on identifying the particular CSI report, the particular CSI report. ### Claim 16 (depends on 14) The method of claim 14, further comprising: adding, based at least in part on identifying the particular CSI report, the destination identifier to the particular CSI report, wherein the particular CSI report transmitted to the Tx UE based at least in part on adding the destination identifier to the particular CSI report. ### Claim 17 (depends on 14) The method of claim 14, wherein the Rx UE is in coverage with the network node and the Tx UE is in coverage with the network node. ### Claim 18 (depends on 14) The method of claim 14, wherein the Rx UE is out-of-coverage with the network node and the Tx UE is in coverage with the network node. ### Claim 19 (depends on 14) The method of claim 14, wherein the particular CSI report is a medium access control control element (MAC-CE) CSI report. ### Claim 20 A transmit (Tx) user equipment (UE) for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to: receive, in a first downlink control information (DCI) 3_0 from a network node, an uplink grant associated with enabling reporting of a particular channel state information (CSI) report, associated with a receive (Rx) UE, to the network node, wherein the uplink grant indicates a destination identifier, associated with the Tx UE, indicating the particular CSI report; transmit, to the Rx UE and based at least in part on the first DCI 3_0, a request, for the particular CSI report, indicating the destination identifier; receive, from the Rx UE and based at least in part on transmitting the request, the particular CSI report; add, based at least in part on receiving the particular CSI report, a receiver identifier, identifying the Rx UE, to the particular CSI report; and transmit, to the network node and based on adding the receiver identifier to the particular CSI report, the particular CSI report, wherein the particular CSI report is transmitted to the network node via a scheduling request procedure based at least in part on whether any uplink grant is available for the Tx UE to transmit the particular CSI report to the network node. ### Claim 21 (depends on 20) The Tx UE of claim 20, wherein the first DCI 3_0 includes a sidelink grant for the Rx UE to transmit the particular CSI report to the Tx UE, and wherein the request comprises sidelink information that includes the sidelink grant. ### Claim 22 (depends on 20) The Tx UE of claim 20, wherein the request is transmitted to the Rx UE using time/frequency resources that are based at least in part on the first DCI 3_0. ### Claim 23 (depends on 20) The Tx UE of claim 20, wherein the CSI report is received further based at least in part on a second DCI indicating a sidelink grant for the RX UE to transmit the particular CSI report to the Tx UE. ### Claim 24 (depends on 20) The Tx UE of claim 20, wherein the request for the particular CSI report is associated with a channel state information reference signal (CSI-RS). ### Claim 25 (depends on 20) The Tx UE of claim 20, wherein the one or more processors are further configured to: transmit an indication of a cell identifier associated with the Tx UE, wherein the particular CSI report is further received based at least in part on the cell identifier. ### Claim 26 (depends on 25) The Tx UE of claim 25, wherein the indication of the cell identifier is transmitted via sidelink control information or L2 signaling. ### Claim 27 A receive (Rx) user equipment (UE) for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors configured to: receive, in a first downlink control information (DCI) 3_0 and from a network node, an uplink grant associated with enabling reporting of a particular channel state information (CSI) report, associated with a transmit (Tx) UE, directly to the network node via the uplink grant; receive, in a second DCI 3_0 and from the Tx UE, sidelink control information (SCI) comprising the uplink grant for the particular CSI report to be transmitted to the TX UE via the uplink grant in a payload of the SCI; identify, based at least in part on a destination identifier included in the uplink grant of at least one of the first DCI 3_0 or the second DCI 3_0, the particular CSI report of a plurality of CSI reports, associated with a plurality of Tx UEs including the Tx UE, stored at the Rx UE; and transmit, directly to the network node and based at least in part on receiving the uplink grant and the SCI and identifying the particular CSI report, the particular CSI report, wherein the particular CSI report is transmitted directly to the network node via a scheduling request procedure based at least in part on whether any uplink grant is available for the Rx UE to transmit the particular CSI report to the network node. ### Claim 28 (depends on 27) The Rx UE of claim 27, wherein the one or more processors are further configured to: add, based at least in part on identifying the particular CSI report, the destination identifier to the particular CSI report, wherein the particular CSI report transmitted to the Tx UE based at least in part on adding the destination identifier to the particular CSI report. ### Claim 29 (depends on 27) The Rx UE of claim 27, wherein the one or more processors are further configured to: receive an indication of a cell identifier associated with the Tx UE, wherein the particular CSI report is further identified based at least in part on the cell identifier. ### Claim 30 (depends on 29) The Rx UE of claim 29, wherein the indication of the cell identifier is received via sidelink control information or L2 signaling.