Provided by the present invention are a method in a user equipment (UE) and a UE. The method in a UE comprises: the UE receiving HARQ feedback information corresponding to physical side link shared channel (PSSCH) transmission; the UE generating acknowledgement information on the basis of the HARQ feedback information, and configuring the content of sidelink control information (SCI) on the basis of HARQ information; and the UE sending the SCI on a physical sidelink control channel (PSCCH).
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