FIELD: communication technology.
SUBSTANCE: invention relates to the field of communication technology. To achieve the effect, the first device obtains configuration information that is used to indicate whether the first device supports the optional Hybrid Automatic Repeat Request (HARQ) feedback function. The first device transmits the SCI to the second device based on the configuration information. Here, the SCI includes the first SCI type and the second SCI type, and the first SCI type or the second SCI type contains a first field that is used to indicate the HARQ feedback mode for multicast data transmission.
EFFECT: providing flexible indication by using SCI direct connection control information and improving data transmission efficiency.
14 cl, 7 dwg
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