Method and apparatus for allocating MBMS based resources for V2X message transmission in wireless communication system
A method and apparatus for allocating resources for vehicle-to-everything (V2X) message transmission in a wireless communication system is provided. For the first solution, a pre-configuration based scheme is defined and specific temporary mobile group identities (TMGIs) are defined for the V2X service. For the second solution, a multi-cell/multicast coordination entity (MCE) receives a request for radio resource, which is based on an amount of V2X messages transmitted from vehicle user equipments (UEs) or road side unit (RSU) UEs, from an eNodB (eNB) supporting V2X function or an eNB type RSU, and transmits multimedia broadcast multicast services (MBMS) scheduling information to the eNB supporting V2X function or an eNB type RSU as a response to the request for radio resource.
1. A method for allocating resources for vehicle-to-everything (V2X) message transmission by a multicast coordination entity (MCE) in a wireless communication system, the method comprising:
receiving a request for a radio resource, which is based on an amount of V2X messages transmitted from vehicle user equipments (UEs) or road side unit (RSU) UEs, from an eNodB (eNB) supporting V2X function or an eNB type RSU,
wherein the V2X messages are either cooperative awareness messages (CAMs) that are periodically reported or decentralized environmental notification messages (DENIMs) that are triggered by an event; and
transmitting multimedia broadcast multicast services (MBMS) scheduling information to the eNB supporting the V2X function or the eNB type RSU as a response to the request for radio resource.
2. The method of claim 1 , wherein the request for radio resource includes at least one of a temporary mobile group identity (TMGI) for a V2X service or a message type of V2X message.
3. The method of claim 1 , wherein the request for radio resource includes the amount of V2X messages transmitted from vehicle UEs or RSU UEs.
4. The method of claim 1 , wherein the request for radio resource includes an amount of V2X messages to be transmitted to other vehicle UEs or RSU UEs.
5. The method of claim 1 , further comprising deciding the radio resource based on the request for radio resource.
6. The method of claim 1 , wherein the MBMS scheduling information includes at least one of a physical multicast channel (PMCH) configuration, a MBMS session list per PMCH, a multicast-broadcast single-frequency network (MBSFN) subframe configuration, or a MBSFN area identifier (ID).
7. The method of claim 6 , wherein the PMCH configuration includes at least one of allocated subframes end, a modulation and coding scheme (MCS), or a multicast channel (MCH) scheduling period.
8. The method of claim 6 , wherein the MBMS session list per PMCH includes at least one of V2X TMGI or a logical channel ID.
9. The method of claim 1 , wherein the request for radio resource is received periodically or by event-trigger.
10. The method of claim 1 , wherein the MBMS scheduling information is transmitted periodically or by event-trigger.