8 Identities

23.2833GPPMission Critical Communication Interworking with Land Mobile Radio SystemsRelease 18TS

8.1 Identity mapping

The IWF provides centralised support for interworking between an MCPTT or MCData system and an LMR system. In MCPTT systems, the identity of an LMR user is provided as an MCPTT ID, and the identity of an LMR group is provided as an MCPTT group ID, which can be used by the IWF to derive the corresponding identities used in an LMR system. Similarly, in MCData systems, the identity of an LMR user is provided as an MCData ID, and the identity of an LMR group is provided as an MCData group ID, which can be used by the IWF to derive the corresponding identities used in an LMR system.

Identities provided on IWF-x reference points are described in clause 8 of 3GPP TS 23.280 [5].

The IWF can perform the identity mapping between an MCPTT system or MCData system and an LMR system during exchange of signalling and media messages.

The assignment of a functional alias that belongs to the MC system to a user homed in the IWF enables the mapping to corresponding role-based addressing schemes applicable in the LMR system.