The V2X user ID can be an instance of the VAL user ID as specified in TS 23.434
. The V2X user ID is a globally unique identifier within the V2X service that represents the V2X user. The V2X user ID shall be a URI. The V2X user ID is used for authentication and authorization purposes for providing the V2X service towards the V2X user via the V2X UE. The V2X user ID also indicates the V2X service provider with whom the V2X user has a V2X service agreement. The V2X user may have V2X service agreement with several V2X service providers and thus will have obtained unique V2X user ID per V2X service provider.
Based on the service agreement, each V2X user ID is mapped to a V2X UE ID.
The V2X UE ID can be an instance of the VAL UE ID as specified in TS 23.434
. The V2X UE ID is a unique identifier within the V2X service that represents the V2X UE. The V2X UE ID is mapped to an application specific UE identity (e.g. StationID as specified in ETSI TS 102 894-2 
or GPSI as specified in TS 23.003
). Due to privacy considerations, the V2X UE ID may be changed. The V2X UE ID is used to address the V2X UE in order to send V2X messages.
The V2X service ID can be an instance of the VAL service ID as specified in TS 23.434
. The V2X service ID is a globally unique identifier that represents the V2X service. A V2X application server provides a list of V2X services towards the V2X UE. Each V2X service is uniquely identified by a V2X service ID, which is an identifier of the V2X application. The V2X service ID can be used for policy mapping, QoS handling for V2X communication and V2X message distribution, as specified in TS 23.285
. An identifier of a V2X service, e.g. ITS-AID or PSID specified in ETSI TS 102 965 
and ISO TS 17419 
, can be used as a V2X service ID.
The V2X group ID is a globally unique identifier within the V2X service that represents a set of V2X users and the corresponding V2X UE. The set of V2X users may belong to the same or different V2X service provider. It indicates the V2X application server where the group is defined.
The V2X service provider defined identity of a geographical area. The GEO ID supports different representations of geographical area (e.g. geo-fence, tile identifiers). The VAE server maintains the mapping of the GEO ID with the location corresponding to one or more V2X UE IDs.
The GEO ID may support the format of a URI.