# US 12,192,002 B2 · Relaying physical sidelink control channel resources > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,002 B2 - Document ID: US12192002B2 - Status: Granted - Kind: B2 - Application number: 18/629,687 - Filed: 2024-04-08 - Published: 2024-08-01 - Granted: 2025-01-07 - Earliest claimed: 2020-05-15 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Lior Uziel; Omri Netanel Mamo; Guy Wolf - Web page: https://patentgrep.com/patent/US12192002B2 ## CPC - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/20: Control channels or signalling for resource management - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 72/02: Selection of wireless resources by user or terminal - H04W 88/04: adapted for relaying to or from another terminal or user - H04W 92/18: between terminal devices - 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 Certain aspects of the present disclosure provide techniques for relaying physical sidelink control channel in sidelink communications. A method that may be performed by a first user equipment (UE) includes receiving a sidelink control information (SCI) transmission from a second UE, the SCI pointing to one or more resources for a retransmission of the SCI by the second UE. The method may include transmitting the SCI to a third UE using the one or more resources for the retransmission of the SCI by the second UE. ## Claims ### Claim 1 A first user equipment (UE) comprising: one or more processors; and a memory coupled to the one or more processors, the memory comprising code executable by the one or more processors to, individually or collectively, cause the first UE to: receive, from a second user equipment (UE), a sidelink control information (SCI) retransmission for a third UE; determine, based on the received SCI retransmission, first one or more resources used by the third UE for a data retransmission; and allocate resources for one or more subsequent transmissions, excluding second one or more resources used by the third UE for the SCI retransmission and the first one or more resources for the data retransmission. ### Claim 2 (depends on 1) The first UE of claim 1, wherein: the SCI retransmission and the data retransmission are associated with a second redundancy (RV); and the memory further comprises code executable by the one or more processors to cause the first UE to: determine third one or more resources used by the third UE for a transmission of the SCI associated with a first RV and for a transmission of the data associated with the first RV; and exclude the third one or more resources for the one or more subsequent transmissions. ### Claim 3 (depends on 2) The first UE of claim 2, wherein the code executable by the one or more processors to cause the first UE to determine the third one or more resources comprises code executable by the one or more processors to cause the first UE to determine the third one or more resources based on a preconfigured association between the first RV and the second RV. ### Claim 4 (depends on 2) The first UE of claim 2, wherein the first one or more resources, the second one or more resources, and the third one or more resources comprise frequency resources and time resources. ### Claim 5 (depends on 1) The first UE of claim 1, wherein the SCI retransmission from the second UE is received in a subframe without a data transmission in the subframe from the second UE. ### Claim 6 (depends on 1) The first UE of claim 1, wherein the SCI retransmission from the second UE comprises an indication that the SCI is an echoed SCI of the retransmission of the SCI by the third UE. ### Claim 7 (depends on 1) The first UE of claim 1, wherein: the first UE, the second UE, and the third UE are configured for cellular vehicle-to-anything (CV2X) communications; the first UE is configured to receive the SCI retransmissions in a physical sidelink control channel (PSCCH); and the first UE is configured to receive data in a physical sidelink shared channel (PSSCH) from the second UE in a subframe with the SCI. ### Claim 8 (depends on 1) The first UE of claim 1, wherein the code executable by the one or more processors to cause the first UE to allocate one or more resources comprises code executable by the one or more processors to cause the first UE to autonomously allocate resources according to a semi-persistent scheduling (SPS) resource allocation algorithm. ### Claim 9 A method for wireless communication by a first user equipment (UE), the method comprising: receiving, from a second UE, a sidelink control information (SCI) retransmission for a third UE; determining, based on the received SCI retransmission, first one or more resources used by the third UE for a data retransmission; and allocating resources for one or more subsequent transmissions, excluding second one or more resources used by the third UE for the SCI retransmission and the first one or more resources for the data retransmission. ### Claim 10 (depends on 9) The method of claim 9, wherein: the SCI retransmission and the data retransmission are associated with a second redundancy (RV); and the method further comprises: determining third one or more resources used by the third UE for a transmission of the SCI associated with a first RV and for a transmission of the data associated with the first RV; and excluding the third one or more resources for the one or more subsequent transmissions. ### Claim 11 (depends on 10) The method of claim 10, wherein the determining the third one or more resources comprises determining the third one or more resources based on a preconfigured association between the first RV and the second RV. ### Claim 12 (depends on 10) The method of claim 10, wherein the first one or more resources, the second one or more resources, and the third one or more resources comprise frequency resources and time resources. ### Claim 13 (depends on 9) The method of claim 9, wherein the SCI retransmission from the second UE is received in a subframe without a data transmission in the subframe from the second UE. ### Claim 14 (depends on 9) The method of claim 9, wherein the SCI retransmission from the second UE comprises an indication that the SCI is an echoed SCI of the retransmission of the SCI by the third UE. ### Claim 15 (depends on 9) The method of claim 9, wherein: the first UE, the second UE, and the third UE are configured for cellular vehicle-to-anything (CV2X) communications; the first UE is configured to receive the SCI retransmissions in a physical sidelink control channel (PSCCH); and the first UE is configured to receive data in a physical sidelink shared channel (PSSCH) from the second UE in a subframe with the SCI. ### Claim 16 (depends on 9) The method of claim 9, wherein the allocating one or more resources comprises autonomously allocating resources according to a semi-persistent scheduling (SPS) resource allocation algorithm. ### Claim 17 A non-transitory computer readable medium storing computer executable code thereon for wireless communication by a first user equipment (UE) that, when executed by one or more processors of the first UE, causes the first UE to: receive, from a second user equipment (UE), a sidelink control information (SCI) retransmission for a third UE; determine, based on the received SCI retransmission, first one or more resources used by the third UE for a data retransmission; and allocate resources for one or more subsequent transmissions, excluding second one or more resources used by the third UE for the SCI retransmission and the first one or more resources for the data retransmission. ### Claim 18 (depends on 17) The non-transitory computer readable medium of claim 17, wherein: the SCI retransmission and the data retransmission are associated with a second redundancy (RV); and the computer executable code, when executed by the one or more processors of the first UE, further causes the first UE to: determine third one or more resources used by the third UE for a transmission of the SCI associated with a first RV and for a transmission of the data associated with the first RV; and exclude the third one or more resources for the one or more subsequent transmissions. ### Claim 19 (depends on 18) The non-transitory computer readable medium of claim 18, wherein the computer executable code that, when executed by the one or more processors of the first UE, causes the first UE to determine the third one or more resources comprises computer executable code that, when executed by the one or more processors of the first UE, causes the first UE to determine the third one or more resources based on a preconfigured association between the first RV and the second RV. ### Claim 20 (depends on 18) The non-transitory computer readable medium of claim 18, wherein the first one or more resources, the second one or more resources, and the third one or more resources comprise frequency resources and time resources.