Content for TS 24.379 Word version: 18.7.0
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10.1.2
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11.2.3
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10.1.2 Chat group (restricted) call p. 312
10.1.2.1 General p. 312
10.1.2.2 MCPTT client procedures p. 312
10.1.2.2.1 On-demand chat group call p. 312
10.1.2.2.1.2 MCPTT client receives SIP re-INVITE request p. 314
10.1.2.2.1.3 MCPTT in-progress emergency cancel p. 316
10.1.2.2.1.4 MCPTT upgrade to in-progress emergency or imminent peril p. 317
10.1.2.2.1.5 MCPTT in-progress imminent peril cancel p. 318
10.1.2.2.1.6 MCPTT client receives a SIP INVITE request for an MCPTT group call p. 319
10.1.2.2.2 Chat group call within a pre-established session p. 321
10.1.2.2.3 End group call p. 323
10.1.2.3 Participating MCPTT function procedures p. 324
10.1.2.3.1 On-demand chat group call p. 324
10.1.2.3.1.1 MCPTT chat session establishment p. 324
10.1.2.3.1.2 Reception of a SIP re-INVITE request from served MCPTT client p. 327
10.1.2.3.1.3 Reception of a SIP INVITE request for terminating MCPTT client p. 328
10.1.2.3.1.4 Reception of a SIP re-INVITE request for terminating MCPTT client p. 330
10.1.2.3.2 Chat group call within a pre-established session p. 330
10.1.2.3.2.1 MCPTT chat session establishment p. 330
10.1.2.3.2.2 MCPTT chat session establishment for terminating user within a pre-established session p. 335
10.1.2.3.3 End group call at the originating participating MCPTT function p. 335
10.1.2.3.3.1 Receipt of SIP BYE request for ending on-demand chat session p. 335
10.1.2.3.3.2 Receipt of SIP REFER "BYE" request for ending chat session using pre-established session p. 335
10.1.2.3.4 End group call at the terminating participating MCPTT function p. 336
10.1.2.4 Controlling MCPTT function procedures p. 336
10.1.2.4.1 On-demand chat group call p. 336
10.1.2.4.1.1 Procedure for establishing an MCPTT chat session and procedure for joining an established MCPTT chat session p. 336
10.1.2.4.1.1A SIP INVITE targeted to the non-controlling MCPTT function of an MCPTT group p. 341
10.1.2.4.1.2 Receipt of a SIP re-INVITE request p. 342
10.1.2.4.1.3 Handling of a SIP re-INVITE request for imminent peril session p. 346
10.1.2.4.2 End group call at the terminating controlling MCPTT function p. 348
10.1.2.4.3 End group call initiated by the controlling MCPTT function p. 348
10.1.2.5 Non-controlling function of an MCPTT group procedures p. 348
10.1.2.5.1 Terminating procedures p. 348
10.1.2.5.1.1 General p. 348
10.1.2.5.1.2 Initiating a chat group session p. 349
10.1.2.5.1.3 Joining an ongoing chat group call p. 349
10.1.2.5.1.4 Splitting an ongoing chat group call p. 350
10.1.2.5.1.5 MCPTT client joining the temporary group chat session p. 351
10.1.2.5.1.6 Receipt of a SIP re-INVITE request from an MCPTT client p. 351
10.1.2.5.1.7 Void
10.1.2.5.1.8 Initiating a temporary group session p. 351
