Content for TS 24.379 Word version: 18.7.0
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10.1.2
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10.2 Off-network group call p. 377
10.2.1 General p. 377
10.2.1.1 Common Procedures p. 377
10.2.2 Basic call control p. 378
10.2.2.1 General p. 378
10.2.2.2 Basic call control state machine p. 378
10.2.2.3 Call Control states p. 379
10.2.2.3.1 S1: start-stop p. 379
10.2.2.3.2 S2: waiting for call announcement p. 380
10.2.2.3.3 S3: part of ongoing call p. 380
10.2.2.3.4 S4: pending user action without confirm indication p. 380
10.2.2.3.5 S5: pending user action with confirm indication p. 380
10.2.2.3.6 S6: ignoring incoming call announcements p. 380
10.2.2.3.7 S7: waiting for call announcement after call release p. 380
10.2.2.4 Procedures p. 380
10.2.2.4.1 General p. 380
10.2.2.4.1.1 Call announcement timer calculation p. 380
10.2.2.4.1.2 Max duration timer calculation p. 380
10.2.2.4.2 Call Probe p. 381
10.2.2.4.2.1 Call probe initiation p. 381
10.2.2.4.2.2 Call probe retransmission p. 381
10.2.2.4.2.3 Receiving GROUP CALL PROBE message when participating in the ongoing call p. 381
10.2.2.4.3 Call setup p. 382
10.2.2.4.3.1 Not receiving any response to GROUP CALL PROBE message p. 382
10.2.2.4.3.2 Receiving a GROUP CALL ANNOUNCEMENT message p. 382
10.2.2.4.3.3 Receiving a GROUP CALL ANNOUNCEMENT message when not participating in the ongoing call p. 383
10.2.2.4.3.4 MCPTT user accepts the terminating call with confirm indication p. 384
10.2.2.4.3.5 MCPTT user accepts the terminating call without confirm indication p. 384
10.2.2.4.3.6 Receiving GROUP CALL ACCEPT message p. 385
10.2.2.4.3.7 MCPTT user rejects the terminating call p. 385
10.2.2.4.3.8 MCPTT user does not act on terminating call p. 385
10.2.2.4.4 Periodic group call announcement p. 385
10.2.2.4.4.1 Sending periodic call announcement p. 385
10.2.2.4.4.2 Receiving periodic call announcement p. 386
10.2.2.4.5 Call release p. 386
10.2.2.4.5.1 MCPTT user leaves the call when GROUP CALL ANNOUNCEMENT was sent or received p. 386
10.2.2.4.5.2 Receiving GROUP CALL ANNOUNCEMENT message for rejected or released call p. 386
10.2.2.4.5.3 MCPTT user initiates originating call for rejected or released call p. 387
10.2.2.4.5.4 No GROUP CALL ANNOUNCEMENT messages for rejected or released call p. 387
10.2.2.4.5.5 MCPTT user leaves the call when GROUP CALL PROBE was sent p. 387
10.2.2.4.5.6 MCPTT user initiates originating call for released call p. 387
10.2.2.4.5.7 Receiving GROUP CALL ANNOUNCEMENT message for released call p. 388
10.2.2.4.5.8 No GROUP CALL ANNOUNCEMENT messages for released call p. 388
10.2.2.4.5.9 Max duration reached p. 388
10.2.2.4.6 Merge of calls p. 389
10.2.2.4.7 Error handling p. 390
