Content for TS 24.379 Word version: 18.1.0
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10.1.2
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11.2.3
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10.2.3 Call type control
10.3 Off-network Broadcast group call
10.3.1 General
10.3.2 Basic call control
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10.2.3 Call type control p. 355
10.2.3.1 General p. 355
10.2.3.2 Call type control state machine p. 355
10.2.3.3 Call type control states p. 356
10.2.3.3.1 T0: waiting for call to establish p. 356
10.2.3.3.2 T1: in-progress emergency group call p. 357
10.2.3.3.3 T2: in-progress basic group call p. 357
10.2.3.3.4 T3: in-progress imminent peril group call p. 357
10.2.3.4 Procedures p. 357
10.2.3.4.1 General p. 357
10.2.3.4.1.1 Implicit downgrade (emergency) timer calculation p. 357
10.2.3.4.1.2 Implicit downgrade (imminent peril) timer calculation p. 357
10.2.3.4.2 User initiated the call probe p. 357
10.2.3.4.3 Received GROUP CALL ANNOUNCEMENT message as a response to GROUP CALL PROBE message p. 358
10.2.3.4.4 Received GROUP CALL ANNOUNCEMENT with MCPTT user acknowledgement required p. 359
10.2.3.4.5 Received GROUP CALL ANNOUNCEMENT without MCPTT user acknowledgement required p. 359
10.2.3.4.6 Call started p. 360
10.2.3.4.7 Upgrade call p. 361
10.2.3.4.7.1 Originating user upgrading the call p. 361
10.2.3.4.7.2 Terminating UE receiving a GROUP CALL ANNOUNCEMENT message when participating in the ongoing call p. 362
10.2.3.4.8 Downgrade call p. 364
10.2.3.4.8.1 Originating user downgrading emergency group call p. 364
10.2.3.4.8.2 Retransmitting GROUP CALL EMERGENCY END p. 364
10.2.3.4.8.3 Terminating user downgrading emergency group call p. 365
10.2.3.4.8.4 Originating user downgrading imminent peril group call p. 365
10.2.3.4.8.5 Retransmitting GROUP CALL IMMINENT PERIL END p. 366
10.2.3.4.8.6 Terminating user downgrading imminent peril group call p. 366
10.2.3.4.8.7 Void
10.2.3.4.8.8 Implicit emergency priority end p. 367
10.2.3.4.8.9 Implicit imminent peril priority end p. 367
10.2.3.4.9 Merge of two calls p. 367
10.2.3.4.10 Call release after call establishment p. 368
10.2.3.4.11 Call release or reject before call establishment p. 368
10.2.3.4.12 Error handling p. 369
10.3 Off-network Broadcast group call p. 369
10.3.1 General p. 369
10.3.2 Basic call control p. 369
10.3.2.1 General p. 369
10.3.2.2 Broadcast group call control state machine p. 369
10.3.2.3 Broadcast group call Control states p. 370
10.3.2.3.1 B1: start-stop p. 370
10.3.2.3.2 B2: in-progress broadcast group call p. 370
10.3.2.3.3 B3: pending user action p. 370
10.3.2.3.4 B4: ignoring same call ID p. 370
10.3.2.4 Procedures p. 371
10.3.2.4.1 User initiating a broadcast group call p. 371
10.3.2.4.2 Terminating UE receiving a GROUP CALL BROADCAST message when not participating in the in-progress broadcast group call p. 371
10.3.2.4.3 MCPTT user accepts the terminating call p. 372
10.3.2.4.4 MCPTT user rejects the terminating call p. 372
10.3.2.4.5 MCPTT user does not act on terminating call p. 372
10.3.2.4.6 Terminating user releasing the call p. 372
10.3.2.4.7 Originating user releasing the call p. 373
10.3.2.4.8 Receiving GROUP CALL BROADCAST END message p. 373
10.3.2.4.9 Originating UE retransmitting GROUP CALL BROADCAST message p. 373
10.3.2.4.10 Ignoring same call ID p. 374
10.3.2.4.11 Releasing the call p. 374
10.3.2.4.12 Restarting TFB1 p. 374
10.3.2.4.13 Receiving GROUP CALL BROADCAST END message p. 374
10.3.2.4.14 Error handling p. 375
