Apparatus and method of vehicle-to-everything communication of same
An apparatus and a method of vehicle-to-everything (V2X) communication of same are provided. The apparatus is a local header. The method includes pre-allocating a plurality of transmission opportunities of a plurality of sidelink (SL) resources in a time domain multiplexed (TDM'ed) manner, and coordinating transmission timings between a plurality of group member user equipments (UEs) in a unicast session or a groupcast session.
1. An apparatus in a vehicle-to-everything (V2X) communication system, the apparatus being a local header and comprising:
a memory;
a transceiver; and
a processor coupled to the memory and the transceiver,
wherein the processor is configured to:
pre-allocate a plurality of transmission opportunities of a plurality of sidelink (SL) resources in a time domain multiplexed (TDM′ed) manner; and
coordinate transmission timings between a plurality of group member user equipments (UEs) in a unicast session or a groupcast session,
wherein the processor is configured to pre-allocate the transmission opportunities of the sidelink (SL) resources in a fair-proportional manner by assigning a start timing or a reference timing, and a UE transmission sequence or a UE member ID for each of the group member UEs, and each of the group member UEs based on a corresponding UE member ID computes the transmission timings in which each of the group member UEs is allowed to transmit a plurality of SL messages according to a following modulo equation: (SFN×10+slot number) mod (number of group member UEs)=UE member ID−1; or
wherein the processor is configured to pre-allocate the transmission opportunities of the sidelink (SL) resources by assigning a start timing and a slot bitmap sequence for each of the group member UEs.
2. The apparatus of claim 1 , wherein the local header is one of the group member UEs, and the local header directly participates in exchanging vehicle-to-everything (V2X) data with other group member UEs in the unicast session or the groupcast session.
3. The apparatus of claim 1 , wherein the slot bitmap sequence is flexibly changed or updated.
4. A method of vehicle-to-everything (V2X) communication of an apparatus, the apparatus being a local header, the method comprising:
pre-allocating a plurality of transmission opportunities of a plurality of sidelink (SL) resources in a time domain multiplexed (TDM′ed) manner; and
coordinating transmission timings between a plurality of group member user equipments (UEs) in a unicast session or a groupcast session,
wherein the method further comprises pre-allocating the transmission opportunities of the sidelink (SL) resources in a fair-proportional manner by assigning a start timing or a reference timing, and a UE transmission sequence or a UE member ID for each of the group member UEs, and each of the group member UEs based on a corresponding UE member ID computes the transmission timings in which each of the group member UEs is allowed to transmit a plurality of SL messages according to a following modulo equation: (SFN×10+slot number) mod (number of group member UEs)=UE member ID−1; or
wherein the method further comprises pre-allocating the transmission opportunities of the sidelink (SL) resources by assigning a start timing and a slot bitmap sequence for each of the group member UEs.
5. The method of claim 4 , wherein the local header is one of the group member UEs, and the local header directly participates in exchanging vehicle-to-everything (V2X) data with other group member UEs in the unicast session or the groupcast session.
6. The method of claim 4 , wherein the slot bitmap sequence is flexibly changed or updated.