US 12,349,009 B2
Cast type transmission management during handovers for sidelink communication
Henry Chang, San Diego, CA (US); and Masato Fujishiro, Yokohama (JP)
Assigned to Kyocera Corporation, Kyoto (JP)
Appl. No. 17/798,471
Filed by Kyocera Corporation, Kyoto (JP)
PCT Filed Feb. 10, 2021, PCT No. PCT/US2021/017369
§ 371(c)(1), (2) Date Aug. 9, 2022,
PCT Pub. No. WO2021/163125, PCT Pub. Date Aug. 19, 2021.
Claims priority of provisional application 62/976,163, filed on Feb. 13, 2020.
Prior Publication US 2023/0109689 A1, Apr. 13, 2023
Int. Cl. H04W 36/00 (2009.01); H04W 36/08 (2009.01)
CPC H04W 36/0009 (2018.08) [H04W 36/0016 (2013.01); H04W 36/037 (2023.05); H04W 36/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method comprising:
transmitting, first data in a first transmission using an initial cast type of a set of cast types comprising groupcast and unicast, from a first user equipment (UE) device to a second UE device of a group and to a third UE device of the group, the first UE device, the second UE device and the third UE device being served by a source base station;
in response to the first UE device determining that the second UE device has initiated a handover to a target base station:
selecting, by the first UE device, a handover cast type from the set of cast types;
transmitting, second data in a second transmission using the handover cast type, from the first UE device to the second UE device; and
transmitting, the second data in a third transmission using the initial cast type, from the first UE device to the third UE device; and
in response to determining all UE devices of the group have completed handovers to the target base station, transmitting third data in a fourth transmission using one of the initial cast type and the handover cast type, from the first UE device to the second UE device and the third UE device.