Content for TS 24.281 Word version: 18.1.0
11 Emergency Alert
11.1 General
11.2 On-network emergency alert
11.3 Off-network emergency alert
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11 Emergency Alert p. 333
11.1 General p. 333
11.2 On-network emergency alert p. 333
11.2.1 Client procedures p. 333
11.2.1.1 Emergency alert origination p. 333
11.2.1.2 Emergency alert cancellation p. 335
11.2.1.3 MCVideo client receives an MCVideo emergency alert or call notification p. 336
11.2.1.4 MCVideo client receives notification of entry into or exit from a group geographic area |R17| p. 338
11.2.1.5 MCVideo client receives notification of entry into or exit from an emergency alert area |R17| p. 339
11.2.2 Participating MCVideo function procedures p. 339
11.2.2.1 Receipt of a SIP MESSAGE request for emergency notification from the served MCVideo client p. 339
11.2.2.2 Receipt of a SIP MESSAGE request for emergency notification for terminating MCVideo client p. 341
11.2.2.3 Receipt of a SIP MESSAGE request indicating successful delivery of emergency notification p. 341
11.2.3 Controlling MCVideo function procedures p. 342
11.3 Off-network emergency alert p. 346
11.3.1 General p. 346
11.3.2 Basic state machine p. 346
11.3.2.1 General p. 346
11.3.2.2 Emergency alert state machine p. 346
11.3.2.3 Emergency alert states p. 347
11.3.3 Procedures p. 347
11.3.3.1 Originating user sending emergency alert p. 347
11.3.3.2 Emergency alert retransmission p. 348
11.3.3.3 Terminating user receiving emergency alert p. 348
11.3.3.4 Terminating user receiving retransmitted emergency alert p. 348
11.3.3.5 Originating user cancels emergency alert p. 349
11.3.3.6 Terminating user receives GROUP EMERGENCY ALERT CANCEL message p. 349
11.3.3.7 Implicit emergency alert cancel p. 349
