Content for TS 24.379 Word version: 18.1.0
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10.1.2
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10.1.2 Chat group (restricted) call p. 282
10.1.2.1 General p. 282
10.1.2.2 MCPTT client procedures p. 282
10.1.2.2.1 On-demand chat group call p. 282
10.1.2.2.1.2 MCPTT client receives SIP re-INVITE request p. 284
10.1.2.2.1.3 MCPTT in-progress emergency cancel p. 286
10.1.2.2.1.4 MCPTT upgrade to in-progress emergency or imminent peril p. 287
10.1.2.2.1.5 MCPTT in-progress imminent peril cancel p. 288
10.1.2.2.1.6 MCPTT client receives a SIP INVITE request for an MCPTT group call p. 289
10.1.2.2.2 Chat group call within a pre-established session p. 291
10.1.2.2.3 End group call p. 293
10.1.2.3 Participating MCPTT function procedures p. 294
10.1.2.3.1 On-demand chat group call p. 294
10.1.2.3.1.1 MCPTT chat session establishment p. 294
10.1.2.3.1.2 Reception of a SIP re-INVITE request from served MCPTT client p. 297
10.1.2.3.1.3 Reception of a SIP INVITE request for terminating MCPTT client p. 298
10.1.2.3.1.4 Reception of a SIP re-INVITE request for terminating MCPTT client p. 300
10.1.2.3.2 Chat group call within a pre-established session p. 300
10.1.2.3.2.1 MCPTT chat session establishment p. 300
10.1.2.3.2.2 MCPTT chat session establishment for terminating user within a pre-established session p. 305
10.1.2.3.3 End group call at the originating participating MCPTT function p. 305
10.1.2.3.3.1 Receipt of SIP BYE request for ending on-demand chat session p. 305
10.1.2.3.3.2 Receipt of SIP REFER "BYE" request for ending chat session using pre-established session p. 305
10.1.2.3.4 End group call at the terminating participating MCPTT function p. 305
10.1.2.4 Controlling MCPTT function procedures p. 306
10.1.2.4.1 On-demand chat group call p. 306
10.1.2.4.1.1 Procedure for establishing an MCPTT chat session and procedure for joining an established MCPTT chat session p. 306
10.1.2.4.1.1A SIP INVITE targeted to the non-controlling MCPTT function of an MCPTT group p. 311
10.1.2.4.1.2 Receipt of a SIP re-INVITE request p. 312
10.1.2.4.1.3 Handling of a SIP re-INVITE request for imminent peril session p. 315
10.1.2.4.2 End group call at the terminating controlling MCPTT function p. 318
10.1.2.4.3 End group call initiated by the controlling MCPTT function p. 318
10.1.2.5 Non-controlling function of an MCPTT group procedures p. 318
10.1.2.5.1 Terminating procedures p. 318
10.1.2.5.1.1 General p. 318
10.1.2.5.1.2 Initiating a chat group session p. 318
10.1.2.5.1.3 Joining an ongoing chat group call p. 319
10.1.2.5.1.4 Splitting an ongoing chat group call p. 320
10.1.2.5.1.5 MCPTT client joining the temporary group chat session p. 320
10.1.2.5.1.6 Receipt of a SIP re-INVITE request from an MCPTT client p. 321
10.1.2.5.1.7 Void
10.1.2.5.1.8 Initiating a temporary group session p. 321
