The present document specifies architecture enhancements to facilitate vehicular communications for Vehicle-to- Everything (V2X) services@ which includes Vehicle-to-Vehicle (V2V)@ Vehicle-to-Pedestrian (V2P)@ Vehicle-to- Infrastructure (V2I)@ and Vehicle-to-Network (V2N)@ according to the use cases and service requirements defined in TS 22.185 [2]. The following vehicular communications for V2X services are specified: - V2X communication over PC5 reference point. - V2X communication over LTE-Uu reference point