CPC H04L 5/0055 (2013.01) [H04L 1/1816 (2013.01); H04W 4/40 (2018.02); H04W 28/04 (2013.01)] | 9 Claims |
1. An apparatus of a user equipment (UE), the apparatus comprising:
processing circuitry configured to:
encode a sidelink transmission for transmission to another UE using one of sidelink resources reserved for vehicle-to-everything (V2X) sidelink transmissions;
decode, from the other UE, Hybrid Automatic Repeat reQuest (HARQ) feedback in response to the sidelink transmission; and
encode, in response to a determination that a retransmission of the sidelink transmission is to be sent based on the HARQ feedback, the retransmission for transmission using another of the sidelink resources; and
a memory configured to store the sidelink resources,
wherein the processing circuitry is further configured to:
determine a set of candidate resources for potential sidelink transmission of a transport block (TB);
select a subset of resources from the set of candidate resources for sidelink transmissions of the TB;
encode, for transmission to the other UE, control channel signalling indicating resources for potential retransmissions of the TB and a request for the HARQ feedback;
reserve up to two resources from the subset of resources through encoded Sidelink Control Information (SCI) signaling transmitted on a previously reserved resource or on a resource selected for an initial transmission of the TB; and
release the up to two sidelink resources in response to reception of HARQ ACK feedback.
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