Patent ID: 11924833
Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A transmission feedback method, comprising:
receiving a time-frequency transmission resource for transmitting feedback information for unicasting or multicasting transmission from a source User Equipment (UE); and
transmitting, by a target UE, the feedback information on the time-frequency transmission resource;
wherein the time-frequency transmission resource at least comprises a Physical Sidelink Shared Channel (PSSCH), a Physical Sidelink Control Channel (PSCCH), and a Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) feedback channel, and Sidelink Control Information (SCI) is carried in the PSCCH and indicates position information about the HARQ-ACK feedback channel;
wherein the transmitting, by the target UE, the feedback information on the time-frequency transmission resource comprises:
performing blind detection on the PSCCH to acquire position information about the PSCCH, the PSSCH and the HARQ-ACK feedback channel;
after the position information about the PSSCH has been acquired, parsing the PSSCH to acquire a unicasting or multicasting transmission state, and determining the feedback information in accordance with the unicasting or multicasting transmission state; and
transmitting the feedback information to the source UE through the HARQ-ACK feedback channel;

wherein the determining the feedback information in accordance with the unicasting or multicasting transmission state comprises:
when the multicasting transmission has been performed unsuccessfully between the target UE and the source UE, generating, by the target UE which has performed reception unsuccessfully, a second sequence carrying Negative Acknowledgement (NACK) information in accordance with a target group ID, wherein the target group ID is determined by at least two target UEs and the source UE through negotiation or interaction in a multicasting connection establishment process;
or,
wherein the determining the feedback information in accordance with the unicasting or multicasting transmission state comprises:
when the multicasting transmission has been performed unsuccessfully between the target UE and the source UE, generating, by the target UE which has performed the reception unsuccessfully, a third sequence carrying NACK information in accordance with the target group ID and corresponding identification information,
wherein the target group ID and the identification information about the source UE and the target UEs are determined by the at least two target UEs and the source UE through negotiation or interaction in the connection establishment process, and different pieces of identification information about the target UEs correspond to different offset values.