# US 12,120,684 B2 · Methods and apparatuses for transmitting and receiving sidelink data > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,684 B2 - Document ID: US12120684B2 - Status: Granted - Kind: B2 - Application number: 17/505,929 - Filed: 2021-10-20 - Published: 2022-02-10 - Granted: 2024-10-15 - Earliest claimed: 2019-04-30 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Pengyu Ji; Jian Zhang; Lei Zhang; Xin Wang - Web page: https://patentgrep.com/patent/US12120684B2 ## CPC - H04L 1/1896: {ARQ related signaling} - H04W 72/20: Control channels or signalling for resource management - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 1/189: {Transmission or retransmission of more than one copy of a message} - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 12/1863: {comprising mechanisms for improved reliability, e.g. status reports (arrangements for detecting or preventing errors by carrying supervisory signal the return channel H04L1/16)} - H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 2001/0093: {Point-to-multipoint} - H04W 72/044: based on the type of the allocated resource - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - 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 Methods and apparatuses for transmitting and receiving sidelink data. The method includes: receiving by a second terminal equipment sidelink control information and sidelink data transmitted by a first terminal equipment; at least according to one or more frequency-domain resources of the sidelink data indicated in the sidelink control information, determining a resource block in which one of at least two sidelink feedback channels for the sidelink data is located; and transmitting feedback information to the first terminal equipment by using the sidelink feedback channel. ## Claims ### Claim 1 An apparatus for performing sidelink data communication, comprising: a memory that stores a plurality of instructions; and processor circuitry coupled to the memory and configured to execute the instructions to receive sidelink control information and sidelink data transmitted by a first terminal equipment, the sidelink data being received by at least two second terminal equipments, and the sidelink control information comprising information on at least one frequency-domain resource of the sidelink data and a group cast information; obtain a feedback resource set in which at least two sidelink feedback channels for the sidelink data is located, according to the information on at least one frequency-domain resource of the sidelink data; determine a resource of sidelink feedback channel in the feedback resource set for a second terminal equipment according the sidelink control information; and transmit feedback information to the first terminal equipment by using the sidelink feedback channel, wherein when the group cast information indicates that the sidelink data is a first group cast data, the resource of sidelink feedback channel in the feedback resource set is determined based on the at least one frequency-domain resource of the sidelink data, and when the group cast information indicates that the sidelink data is a second group cast data, the resource of sidelink feedback channel in the feedback resource set is determined based on the at least one frequency-domain resource of the sidelink data and an intragroup identifier of a terminal equipment; wherein when the number of terminal equipment in a group is less than or equal to the number of the sidelink feedback channels corresponds to a first time-frequency resource in a sidelink resource pool, at least two second terminal equipment are configured to transmit feedback information by using a same sidelink feedback channel or by using at least two respective sidelink feedback channels, and when the number of terminal equipment in a group is larger than the number of the sidelink feedback channels corresponds to a first time-frequency resource in the sidelink resource pool, at least two second terminal equipments are configured to transmit feedback information by using a same sidelink feedback channel. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the sidelink data comprise one of the following: unicast data, first groupcast data, and second groupcast data, the unicast data is transmitted by the first terminal equipment to a second terminal equipment, the first groupcast data is transmitted by the first terminal equipment to at least two second terminal equipments, and the at least two second terminal equipments transmit feedback information in the same sidelink feedback channel, and the second groupcast data is transmitted by the first terminal equipment to at least two second terminal equipments, the at least two second terminal equipments respectively transmit feedback information in at least two sidelink feedback channels. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the processor circuitry is configured to transmit feedback information using code-division multiplex sequence according to the group cast information and the intragroup identifier. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the first terminal equipment and/or a second terminal equipment is/are configured or preconfigured with sidelink resource pool configuration information, and the sidelink resource pool configuration information comprises first indication information used for indicating that a first time-frequency resource corresponds to the feedback resource set for conveying at least two sidelink feedback channels. ### Claim 5 (depends on 4) The apparatus according to claim 4, wherein the sidelink resource pool configuration information further comprises a second indication information used for indicating a number of the sidelink feedback channels in the feedback resource set. ### Claim 6 (depends on 4) The apparatus according to claim 4, wherein the number of the feedback channels corresponding to a first time-frequency resource configured in the sidelink resource pool configuration information is identical to the number of the feedback channels corresponding to another first time-frequency resource configured in the sidelink resource pool configuration information. ### Claim 7 (depends on 1) The apparatus according to claim 1, wherein a first time-frequency resource is selected by the first terminal equipment and is taken as a frequency-domain starting position for transmitting the sidelink data. ### Claim 8 (depends on 1) The apparatus according to claim 1, wherein the processor circuitry is configured to obtain the feedback resource set from a sub-channel to which a starting position of the sidelink data corresponds. ### Claim 9 A communication system, comprising: a first terminal equipment configured to transmit sidelink control information and sidelink data, the sidelink control information comprising information on at least one frequency-domain resource of the sidelink data and a group cast information; and a second terminal equipment configured to receive the sidelink control information and the sidelink data, obtain a feedback resource set in which at least two sidelink feedback channels for the sidelink data is located according to the information on at least one frequency-domain resource of the sidelink data, determine a resource of sidelink feedback channel in the feedback resource set for the second terminal equipment according the sidelink control information, and transmit feedback information to the first terminal equipment by using the sidelink feedback channel, wherein when the group cast information indicates that the sidelink data is a first group cast data, the resource of sidelink feedback channel in the feedback resource set is determined based on the at least one frequency-domain resource of the sidelink data, and when the group cast information indicates that the sidelink data is a second group cast data, the resource of sidelink feedback channel in the feedback resource set is determined based on the at least one frequency-domain resource of the sidelink data and an intragroup identifier of a terminal equipment; wherein when the number of terminal equipment in a group is less than or equal to the number of the sidelink feedback channels corresponds to a first time-frequency resource in a sidelink resource pool, at least two second terminal equipment are configured to transmit feedback information by using a same sidelink feedback channel or by using at least two respective sidelink feedback channels, and when the number of terminal equipment in a group is larger than the number of the sidelink feedback channels corresponds to a first time-frequency resource in the sidelink resource pool, at least two second terminal equipments are configured to transmit feedback information by using a same sidelink feedback channel. ### Claim 10 (depends on 9) The system according to claim 9, wherein the first terminal equipment and/or the second terminal equipment is/are configured or preconfigured with sidelink resource pool configuration information, and the sidelink resource pool configuration information comprises first indication information used for indicating that a first time-frequency resource corresponds to the feedback resource set for conveying at least two sidelink feedback channels. ### Claim 11 (depends on 10) The system according to claim 10, wherein the at least two sidelink feedback channels in the feedback resource set to which the first time-frequency resource corresponds are code-division multiplexed on the same resource block according to an intra-group identifier of a terminal equipment, and/or, the at least two sidelink feedback channels to which the first time-frequency resource corresponds are frequency-division multiplexed by using different resource blocks according to an intra-group identifier of a terminal equipment. ### Claim 12 (depends on 9) The system according to claim 9, wherein a first time-frequency resource is selected by the first terminal equipment and is taken as a frequency-domain starting position for transmitting the sidelink data.