Content for  TS 23.283  Word version:  19.0.0

The following subclauses define information flows and signaling procedures for group calls and broadcast group calls. Where the group is defined in the MCPTT system and where the IWF has affiliated to an MCPTT group with a single affiliation on behalf of all LMR group members, only a single IWF group call request / IWF group call release request message is sent to the IWF at the commencement / release of a group call. Where the group is defined in the MCPTT system and where the IWF has passed through individual affiliations for each group member in the LMR system, the MCPTT system shall send individual IWF group call request / IWF group call release request messages to the IWF for all affiliated group members in the LMR system in accordance with primary and partner MCPTT system behaviour. In both cases, the distribution of the messages to group members in the LMR system is out of scope of the present document. Where the group is defined in the LMR system, the IWF shall send individual IWF group call request / IWF group call release request messages to the IWF for all affiliated MCPTT group members in accordance with primary and partner MCPTT system behaviour.