# US 12,225,397 B2 · Method and device for measuring and reporting channel state in sidelink communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,397 B2 - Document ID: US12225397B2 - Status: Granted - Kind: B2 - Application number: 17/607,252 - Filed: 2020-04-29 - Published: 2022-06-23 - Granted: 2025-02-11 - Earliest claimed: 2019-05-02 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Cheolkyu Shin; Hyunseok Ryu; Jeongho Yeo; Jinyoung Oh; Sungjin Park; Jonghyun Bang - Web page: https://patentgrep.com/patent/US12225397B2 ## CPC - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0057: {Physical resource allocation for CQI} - H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] - H04W 4/46: for vehicle-to-vehicle communication [V2V] - H04W 84/005: {Moving wireless networks} - H04W 92/18: between terminal devices - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - 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 Disclosed are: a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security, and safety-related services, and the like) on the basis of 5G communication technology and IoT0 related technology. A method for measuring and reporting a channel state in sidelink communication is disclosed. ## Claims ### Claim 1 A method performed by a first terminal in a wireless communication system, the method comprising: receiving, from a second terminal via a PC5-radio resource control (RRC) signaling, first information on a channel state information-reference signal (CSI-RS) for sidelink (SL) and second information on a latency bound of a channel state information (CSI) report for the SL: receiving, from the second terminal, the CSI-RS for the SL based on the first information: receiving, from the second terminal, control information to trigger the CSI report associated with the CSI-RS; identifying a time at which the triggered CSI report is transmitted; in case that the time does not exceed a valid SL CSI window, transmitting, to the second terminal, the triggered CSI report; and in case that the time exceeds the valid SL CSI window, cancelling the triggered CSI report, wherein the valid SL CSI window is determined based on the latency bound which is configured by the PC5-RRC signaling. ### Claim 2 (depends on 1) The method of claim 1, wherein the first information includes information on a position of a resource for the CSI-RS, and information on a number of a port for the CSI-RS. ### Claim 3 (depends on 1) The method of claim 1, wherein the CSI-RS is received from the second terminal, in case that the CSI report is configured to be enabled. ### Claim 4 (depends on 1) The method of claim 1, wherein a reference resource for the CSI report is identified by a same slot as the control information to trigger the CSI report. ### Claim 5 (depends on 1) The method of claim 1, wherein the CSI report including a rank indicator (RI) and a channel quality indicator (CQI) is transmitted via a medium access control (MAC) control element (CE). ### Claim 6 (depends on 1) The method of claim 1, further comprising: generating the triggered CSI report based on a measurement for the CSI-RS; and identifying a physical sidelink shared channel (PSSCH) resource to transmit the triggered CSI report. ### Claim 7 (depends on 1) The method of claim 1, wherein an aperiodic type of the CSI report is triggered by the control information, and wherein the latency bound is configured in number of slots. ### Claim 8 A first terminal in a wireless communication system, the first terminal comprising: a transceiver; and a controller configured to: control the transceiver to receive, from a second terminal via a PC5-radio resource control (RRC) signaling, first information on a channel state information-reference signal (CSI-RS) for a sidelink (SL) and second information on a latency bound of a channel state information (CSI) report for the SL, control the transceiver to receive, from the second terminal, the CSI-RS for the SL based on the first information, control the transceiver to receive, from the second terminal, control information to trigger the CSI report associated with the CSI-RS, identify a time at which the triggered CSI report is transmitted, and in case that the time does not exceed a valid SL CSI window, control the transceiver to transmit, to the second terminal, the triggered CSI report, and in case that the time exceeds the valid SL CSI window, cancel the triggered CSI report, wherein the valid SL CSI window is determined based on the latency bound which is configured by the PC5-RRC signaling. ### Claim 9 (depends on 8) The first terminal of claim 8, wherein the first information includes information on a position of a resource for the CSI-RS, and information on a number of a port for the CSI-RS. ### Claim 10 (depends on 8) The first terminal of claim 8, wherein the CSI-RS is received from the second terminal, in case that the CSI reporting is configured to be enabled. ### Claim 11 (depends on 8) The first terminal of claim 8, wherein a reference resource for the CSI report is identified by a same slot as the control information to trigger the CSI report. ### Claim 12 (depends on 8) The first terminal of claim 8, wherein the CSI report including a rank indicator (RI) and a channel quality indicator (CQI) is transmitted via a medium access control (MAC) control element (CE). ### Claim 13 (depends on 8) The first terminal of claim 8, wherein the controller is further configured to: generate the triggered CSI report based on a measurement for the CSI-RS; and identify a physical sidelink shared channel (PSSCH) resource to transmit the triggered CSI report. ### Claim 14 (depends on 8) The first terminal of claim 8, wherein an aperiodic type of the CSI report is triggered by the control information, and wherein a latency bound is configured in number of slots.