# US 12,193,031 B2 · Configured chase-combining reception for new radio (NR) sidelink mode 1 > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,031 B2 - Document ID: US12193031B2 - Status: Granted - Kind: B2 - Application number: 18/543,679 - Filed: 2023-12-18 - Published: 2024-04-11 - Granted: 2025-01-07 - Earliest claimed: 2021-05-05 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Yisheng Xue; Jing Sun; Chih-Hao Liu; Xiaoxia Zhang; Tao Luo; Piyush Gupta - Web page: https://patentgrep.com/patent/US12193031B2 ## CPC - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/0025: {Transmission of mode-switching indication} - H04L 1/1816: {with retransmission of the same, encoded, message} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1845: {Combining techniques, e.g. code combining} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 1/1893: {Physical mapping arrangements (physical resource mapping in general H04L5/00)} - H04L 1/1896: {ARQ related signaling} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 72/0466: {the resource being a scrambling code} - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W 72/20: Control channels or signalling for resource management - H04L 1/0003: {by switching between different modulation schemes} - 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 This disclosure provides systems, methods, and devices for wireless communication that support configured reception with sidelink control information (SCI) repetition over a sidelink. In aspects, a receiving user equipment (UE) may be configured to conduct combined reception/decoding of SCI repetitions (received from a transmitting UE over a sidelink) over multiple time-frequency slots at pre-defined occasions (e.g., occasions configured by a base station) to decode a sidelink transmission. In aspects, a receiving UE may receive from a transmitting UE over a sidelink, a sidelink transmission during a reception occasion that includes a plurality of reception opportunities for the receiving UE. Each reception opportunity of the plurality of reception opportunities includes a repetition of an SCI. The receiving UE decodes the SCI by combining the repetitions of the SCI received in one or more reception opportunities, and decodes a data transmission (e.g., a physical sidelink shared channel (PSSCH) transmission) using the decoded SCI. ## Claims ### Claim 1 A method of wireless communication performed at a first user equipment (UE), the method comprising: receiving, from a second UE over a sidelink, a sidelink transmission during a reception occasion that includes at least a first reception opportunity and at least a second reception opportunity subsequent in time to the first reception opportunity, each reception opportunity of a plurality of reception opportunities including a repetition of a sidelink control information (SCI) message transmitted by the second UE; initiating decoding of the SCI message included in the first reception opportunity; and in response to identifying that the SCI message included in the first reception opportunity has been decoded: decoding, based on the decoded SCI message, a data transmission, and refraining from decoding repetitions of the SCI message included in the second reception opportunity and included in any reception opportunities of the plurality of reception opportunities subsequent to the second reception opportunity. ### Claim 2 (depends on 1) The method of claim 1, further comprising, in response to identifying that the SCI message included in the first reception opportunity has not been decoded, initiating decoding of the SCI message included in the second reception opportunity. ### Claim 3 (depends on 2) The method of claim 2, further comprising, in response to identifying that the SCI message included in the first reception opportunity has not been decoded, storing, in a memory of the first UE, a log likelihood ratio (LLR) associated with the SCI message included in the first reception opportunity prior to initiating decoding of the repetition of the SCI message included in the second reception opportunity. ### Claim 4 (depends on 2) The method of claim 2, further comprising, in response to identifying that the SCI message included in the first reception opportunity has not been decoded: combining the repetitions of the SCI message included in reception opportunities subsequent to the second reception opportunity, decoding the SCI message over the combined repetitions of the SCI message, and decoding the data transmission based on the decoded SCI message. ### Claim 5 (depends on 4) The method of claim 4, wherein combining the repetitions of the SCI message included in reception opportunities subsequent to the second reception opportunity includes: combining repetitions of the SCI message included in a third reception opportunity and included in a fourth reception opportunity, wherein combining the repetitions of the SCI message included in the third reception opportunity and in the fourth reception opportunity includes setting a reservation field of each SCI message included in the third reception opportunity and included in the fourth reception opportunity to a null pointer, wherein setting the reservation field to the null pointer disables sidelink transmission reservation. ### Claim 6 (depends on 4) The method of claim 4, wherein combining the repetitions of the SCI message included in reception opportunities subsequent to the second reception opportunity includes: combining repetitions of the SCI message included in a third reception opportunity and included in a fourth reception opportunity; and decoding the SCI message as a result of combining the repetitions of the SCI message; and refraining from decoding the repetitions of the SCI message included in reception opportunities subsequent to the fourth reception opportunity in response to decoding the SCI message. ### Claim 7 (depends on 1) The method of claim 1, wherein: the data transmission includes a physical sidelink shared channel (PSSCH) transmission, the decoded SCI message includes an indication of a location of the PSSCH transmission, and the decoded message includes information for decoding the PSSCH transmission. ### Claim 8 (depends on 1) The method of claim 1, further comprising: identifying that the SCI message included in the first reception opportunity has been decoded, wherein identifying that the SCI message has been decoded includes determining that the SCI message includes a 16-bit destination identifier that is matched to a layer 2 identifier of the SCI message. ### Claim 9 (depends on 1) The method of claim 1, further comprising, in response to identifying that the SCI message included in the first reception opportunity has been decoded, transmitting an acknowledgment (ACK) message earlier in time than an occurrence of the second reception opportunity. ### Claim 10 An apparatus configured for wireless communication, the apparatus including: at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured to: initiate reception, from a second UE over a sidelink, a sidelink transmission during a reception occasion that includes at least a first reception opportunity and at least a second reception opportunity subsequent in time to the first reception opportunity, each reception opportunity of a plurality of reception opportunities including a repetition of a sidelink control information (SCI) message transmitted by the second UE; initiate decoding of the SCI message included in the first reception opportunity; and in response to identification that the SCI message included in the first reception opportunity has been decoded: decode, based on the decoded SCI message, a data transmission, and refrain from decoding repetitions of the SCI message included in the second reception opportunity and included in any reception opportunities of the plurality of reception opportunities subsequent to the second reception opportunity. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the at least one processor is further configured to: in response to identification that the SCI message included in the first reception opportunity has not been decoded, initiate decoding of the SCI message included in the second reception opportunity. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the at least one processor is further configured to: in response to identification that the SCI message included in the first reception opportunity has not been decoded, store, in the at least one memory, a log likelihood ratio (LLR) associated with the SCI message included in the first reception opportunity prior to initiation of decoding of the repetition of the SCI message included in the second reception opportunity. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the at least one processor is further configured to, in response to identifying that the SCI message included in the first reception opportunity has not been decoded: combine the repetitions of the SCI message included in reception opportunities subsequent to the second reception opportunity, decode the SCI message over the combined repetitions of the SCI message, and decode the data transmission based on the decoded SCI message. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein, to combine the repetitions of the SCI message included in reception opportunities subsequent to the second reception opportunity, the at least one processor is configured to: combine repetitions of the SCI message included in a third reception opportunity and included in a fourth reception opportunity, wherein, to combine the repetitions of the SCI message included in the third reception opportunity and in the fourth reception opportunity, the at least one processor is configured to set a reservation field of each SCI message included in the third reception opportunity and included in the fourth reception opportunity to a null pointer, wherein setting the reservation field to the null pointer disables sidelink transmission reservation. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein, to combine the repetitions of the SCI message included in reception opportunities subsequent to the second reception opportunity, the at least one processor is configured to: combine repetitions of the SCI message included in a third reception opportunity and included in a fourth reception opportunity; and decode the SCI message as a result of combining the repetitions of the SCI message; and refrain from decoding the repetitions of the SCI message included in reception opportunities subsequent to the fourth reception opportunity in response to decoding the SCI message. ### Claim 16 A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform operations that include: receiving, from a second UE over a sidelink, a sidelink transmission during a reception occasion that includes at least a first reception opportunity and at least a second reception opportunity subsequent in time to the first reception opportunity, each reception opportunity of a plurality of reception opportunities including a repetition of a sidelink control information (SCI) message transmitted by the second UE; initiating decoding of the SCI message included in the first reception opportunity; and in response to identifying that the SCI message included in the first reception opportunity has been decoded: decoding, based on the decoded SCI message, a data transmission, and refraining from decoding repetitions of the SCI message included in the second reception opportunity and included in any reception opportunities of the plurality of reception opportunities subsequent to the second reception opportunity. ### Claim 17 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein: the data transmission includes a physical sidelink shared channel (PSSCH) transmission, the decoded SCI message includes an indication of a location of the PSSCH transmission, and the decoded message includes information for decoding the PSSCH transmission. ### Claim 18 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the operations further include: identifying that the SCI message included in the first reception opportunity has been decoded, wherein identifying that the SCI message has been decoded includes determining that the SCI message includes a 16-bit destination identifier that is matched to a layer 2 identifier of the SCI message. ### Claim 19 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the operations further include, in response to identifying that the SCI message included in the first reception opportunity has been decoded, transmitting an acknowledgment (ACK) message earlier in time than an occurrence of the second reception opportunity. ### Claim 20 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the operations further include, in response to identifying that the SCI message included in the first reception opportunity has not been decoded, storing a log likelihood ratio (LLR) associated with the SCI message included in the first reception opportunity prior to initiating decoding of the repetition of the SCI message included in the second reception opportunity.