11.1 General

23.2803GPPCommon functional architecture to support mission critical servicesRelease 18Stage 2TS

An MC gateway UE enables MC service access for a MC service user residing on non-3GPP capable devices and for devices which are unable to host MC service clients. In order to be able to participate in a MC service, the MC gateway UE provides the following necessary functions to enable the MC service access for such MC clients:

– MC gateway client to MC gateway association: Authorised binding and use of non-3GPP based access with an MC service client. Indicate associated MC gateway clients when the MC gateway UE cannot serve the connected MC service clients (any longer).

– 3GPP transport resources: Sharing of MC gateway UE 3GPP transport resources among the associated MC service clients.

– MC client identification: Independent MC service client identification, MC service client authorisation and MC service profile association.

– Location Management: Providing location management support for the associated MC clients to handle the location information and triggers related to 3GPP access network.

– MC client communication integrity: Ensure that signalling, media content and traffic attributes, e.g. priority and QoS, of communications between the MC system and MC service client remains unaltered.

The following functions are provided by the MC gateway client:

– MC gateway association: Allowing an MC gateway client to simultaneously bind to multiple MC gateway UEs.

NOTE 1: An MC gateway client and its associated MC clients can only have one active binding per MC service with the associated MC gateway UE.

– MC service selection: Choose between multiple MC gateway UEs for the required MC service capability.

– MC service continuation: Enables reselection of the MC gateway UE association while MC service continues.

NOTE 2: Further information about MC gateway UE selection are summarized in Annex D.