C.2 PC5 based V2X communication with MBMS reception

23.2853GPPArchitecture enhancements for V2X servicesRelease 17TS

In this operation mode, a UE always transmits the V2X messages via PC5. The UE receives V2X messages via PC5 and via MBMS as well.

A stationary infrastructure entity acting as a UE, e.g. an RSU, receives V2X messages via PC5, and forwards the application layer processed V2X messages to a V2X Application Server via V1 interface, e.g. using a PDN connection over LTE-Uu or other type of connection (for example fixed). The V2X messages processed by the V2X Application Server can be distributed to UEs via the MBMS system as required.

In this manner, a UE can directly receive V2V messages from other UEs in close proximity. Additionally, in this operation mode, the mobile network provides information from an extended range and satisfies the needs of soft safety (e.g. situational awareness at range) or enables more advanced driving assistance applications. This combined sources of information are especially useful in high density use cases, where the UE may not be able to reliably receive V2X messages directly from distant UEs over PC5.