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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10.2.3 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. 390
10.2.3.1 General p. 390
10.2.3.2 Call type control state machine p. 390
10.2.3.3 Call type control states p. 391
10.2.3.3.1 T0: waiting for call to establish p. 391
10.2.3.3.2 T1: in-progress emergency group call p. 392
10.2.3.3.3 T2: in-progress basic group call p. 392
10.2.3.3.4 T3: in-progress imminent peril group call p. 392
10.2.3.4 Procedures p. 392
10.2.3.4.1 General p. 392
10.2.3.4.1.1 Implicit downgrade (emergency) timer calculation p. 392
10.2.3.4.1.2 Implicit downgrade (imminent peril) timer calculation p. 392
10.2.3.4.2 User initiated the call probe p. 392
10.2.3.4.3 Received GROUP CALL ANNOUNCEMENT message as a response to GROUP CALL PROBE message p. 393
10.2.3.4.4 Received GROUP CALL ANNOUNCEMENT with MCPTT user acknowledgement required p. 394
10.2.3.4.5 Received GROUP CALL ANNOUNCEMENT without MCPTT user acknowledgement required p. 394
10.2.3.4.6 Call started p. 395
10.2.3.4.7 Upgrade call p. 396
10.2.3.4.7.1 Originating user upgrading the call p. 396
10.2.3.4.7.2 Terminating UE receiving a GROUP CALL ANNOUNCEMENT message when participating in the ongoing call p. 397
10.2.3.4.8 Downgrade call p. 399
10.2.3.4.8.1 Originating user downgrading emergency group call p. 399
10.2.3.4.8.2 Retransmitting GROUP CALL EMERGENCY END p. 399
10.2.3.4.8.3 Terminating user downgrading emergency group call p. 400
10.2.3.4.8.4 Originating user downgrading imminent peril group call p. 400
10.2.3.4.8.5 Retransmitting GROUP CALL IMMINENT PERIL END p. 401
10.2.3.4.8.6 Terminating user downgrading imminent peril group call p. 401
10.2.3.4.8.7 Void
10.2.3.4.8.8 Implicit emergency priority end p. 402
10.2.3.4.8.9 Implicit imminent peril priority end p. 402
10.2.3.4.9 Merge of two calls p. 402
10.2.3.4.10 Call release after call establishment p. 403
10.2.3.4.11 Call release or reject before call establishment p. 403
10.2.3.4.12 Error handling p. 404
10.3 Off-network Broadcast group call p. 404
10.3.1 General p. 404
10.3.2 Basic call control p. 404
10.3.2.1 General p. 404
10.3.2.2 Broadcast group call control state machine p. 404
10.3.2.3 Broadcast group call Control states p. 405
10.3.2.3.1 B1: start-stop p. 405
10.3.2.3.2 B2: in-progress broadcast group call p. 405
10.3.2.3.3 B3: pending user action p. 405
10.3.2.3.4 B4: ignoring same call ID p. 405
10.3.2.4 Procedures p. 406
10.3.2.4.1 User initiating a broadcast group call p. 406
10.3.2.4.2 Terminating UE receiving a GROUP CALL BROADCAST message when not participating in the in-progress broadcast group call p. 406
10.3.2.4.3 MCPTT user accepts the terminating call p. 407
10.3.2.4.4 MCPTT user rejects the terminating call p. 407
10.3.2.4.5 MCPTT user does not act on terminating call p. 407
10.3.2.4.6 Terminating user releasing the call p. 407
10.3.2.4.7 Originating user releasing the call p. 408
10.3.2.4.8 Receiving GROUP CALL BROADCAST END message p. 408
10.3.2.4.9 Originating UE retransmitting GROUP CALL BROADCAST message p. 408
10.3.2.4.10 Ignoring same call ID p. 409
10.3.2.4.11 Releasing the call p. 409
10.3.2.4.12 Restarting TFB1 p. 409
10.3.2.4.13 Receiving GROUP CALL BROADCAST END message p. 409
10.3.2.4.14 Error handling p. 410
