Sidelink resource reselection method and apparatus

A sidelink resource reselection apparatus, comprising:

• first processor circuitry configured to perform resource re-evaluation and/or pre-emption check on sidelink resources initially selected for performing a plurality of times of transmission of a transport block;
• and
• second processor circuitry configured to reselect one or more sidelink resources from a sidelink resource set in a case where the one or more sidelink resources are not in a reselection candidate resource set;
• wherein, after reselection, a sidelink resource for retransmission is configured to be indicated by a sidelink control information, and a time gap between a re-selected first sidelink resource and a second sidelink resource is ensured such that the re-selected first sidelink resource is not within a time after a slot where a physical sidelink feedback channel to which the second sidelink resource corresponds is at,
• wherein the first processor circuitry performs the resource re-evaluation at a time point before the i-th initially selected sidelink resource, and determines that one or more sidelink resources of the sidelink control information are not in the reselection candidate resource set;
• where, i is an integer,
• the second processor circuitry performs resource reselection on the one or more sidelink resources not in the reselection candidate resource set,
• in a case where a maximum number Nmax of resources that the sidelink control information is able to indicate is 2 or 3 and a sidelink resource not in the reselection candidate resource set is an (i+1)-th or (i+2)-th sidelink resource, reselection is performed on the (i+1)-th or (i+2)-th sidelink resource,
• a sidelink resource is reselected from the sidelink resource set based on time frequency resources of the i-th sidelink resource and the (i+2)-th sidelink resource to an N1-th sidelink resource;
• where, 1≤i≤N1−2, N1 being the number of the initially selected sidelink resources, and
• in a case where a time interval between the i-th sidelink resource and the (i+2)-th sidelink resource is within a predetermined range, the reselected sidelink resource satisfies the following condition that:
• a time interval between the reselected sidelink resource and at least one of the i-th sidelink resource and the (i+2)-th sidelink resource to the N1-th sidelink resource is within the predetermined range, and the reselected sidelink resource is not at the same slot as any one of the i-th sidelink resource and the (i+2)-th sidelink resource to the N1-th sidelink resource.