Content for TS 24.282 Word version: 19.2.0
16 Emergency Alert
16.1 General
16.2 On-network emergency alert
16.2A On-network MCData adhoc group emergency alert
16.3 Off-network emergency alert
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16 Emergency Alert |R16| p. 369
16.1 General p. 369
16.2 On-network emergency alert p. 370
16.2.1 Client procedures p. 370
16.2.1.1 Emergency alert origination p. 370
16.2.1.2 Emergency alert cancellation p. 371
16.2.1.3 MCData client receives an MCData emergency alert or communication notification p. 373
16.2.1.4 MCData client receives notification of entry into or exit from a group geographic area |R17| p. 375
16.2.1.5 MCData client receives notification of entry into or exit from an emergency alert area |R17| p. 375
16.2.2 Participating MCData function procedures p. 376
16.2.2.1 Receipt of a SIP MESSAGE request for emergency notification from the served MCData client p. 376
16.2.2.2 Receipt of a SIP MESSAGE request for emergency notification for terminating MCData client p. 377
16.2.2.3 Receipt of a SIP MESSAGE request indicating successful delivery of emergency notification p. 378
16.2A On-network MCData adhoc group emergency alert |R18| p. 379
16.2A.1 Client procedures p. 379
16.2A.1.1 Ad hoc group emergency alert origination p. 379
16.2A.1.2 Ad hoc group emergency alert cancellation p. 380
16.2A.1.3 MCData client receives an MCData adhoc group emergency alert notification p. 382
16.2A.2 Participating MCData function procedures p. 383
16.2A.2.1 Receipt of a SIP MESSAGE request for adhoc group emergency notification from the served MCData client p. 383
16.2A.2.2 Receipt of a SIP MESSAGE request for adhoc group emergency notification for terminating MCData client p. 384
16.2A.2.3 Receipt of a SIP MESSAGE request indicating successful delivery of adhoc group emergency notification of originating MCData client p. 384
16.2A.2.4 Adhoc group emergency alert participants modify procedure initiated by participating MCData function p. 385
16.2A.3 Controlling MCData function procedures p. 385
16.2A.3.1 Handling of adhoc group emergency alert notification p. 385
16.2A.3.2 Handling of adhoc group emergency alert cancellation p. 386
16.2A.3.3 Handling of ongoing adhoc group emergency alert p. 388
16.2A.3.4 Handling of adhoc group emergency alert participants modify procedure initiated by participating MCData function p. 389
16.2.3 Controlling MCData function procedures |R16| p. 389
16.3 Off-network emergency alert p. 394
16.3.1 General p. 394
16.3.2 Basic state machine p. 394
16.3.2.1 General p. 394
16.3.2.2 Emergency alert state machine p. 394
16.3.2.3 Emergency alert states p. 394
16.3.3 Procedures p. 395
16.3.3.1 Originating user sending emergency alert p. 395
16.3.3.2 Emergency alert retransmission p. 395
16.3.3.3 Terminating user receiving emergency alert p. 395
16.3.3.4 Terminating user receiving retransmitted emergency alert p. 396
16.3.3.5 Originating user cancels emergency alert p. 396
16.3.3.6 Terminating user receives GROUP EMERGENCY ALERT CANCEL message p. 396
16.3.3.7 Implicit emergency alert cancel p. 397
