Content for TS 24.281 Word version: 18.6.0
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. 361
11.1 General p. 361
11.2 On-network emergency alert p. 361
11.2.1 Client procedures p. 361
11.2.1.1 Emergency alert origination p. 361
11.2.1.2 Emergency alert cancellation p. 363
11.2.1.3 MCVideo client receives an MCVideo emergency alert or call notification p. 364
11.2.1.4 MCVideo client receives notification of entry into or exit from a group geographic area |R17| p. 366
11.2.1.5 MCVideo client receives notification of entry into or exit from an emergency alert area |R17| p. 367
11.2.2 Participating MCVideo function procedures p. 367
11.2.2.1 Receipt of a SIP MESSAGE request for emergency notification from the served MCVideo client p. 367
11.2.2.2 Receipt of a SIP MESSAGE request for emergency notification for terminating MCVideo client p. 369
11.2.2.3 Receipt of a SIP MESSAGE request indicating successful delivery of emergency notification p. 369
11.2.3 Controlling MCVideo function procedures p. 370
11.3 Off-network emergency alert p. 375
11.3.1 General p. 375
11.3.2 Basic state machine p. 375
11.3.2.1 General p. 375
11.3.2.2 Emergency alert state machine p. 375
11.3.2.3 Emergency alert states p. 375
11.3.3 Procedures p. 376
11.3.3.1 Originating user sending emergency alert p. 376
11.3.3.2 Emergency alert retransmission p. 376
11.3.3.3 Terminating user receiving emergency alert p. 376
11.3.3.4 Terminating user receiving retransmitted emergency alert p. 377
11.3.3.5 Originating user cancels emergency alert p. 377
11.3.3.6 Terminating user receives GROUP EMERGENCY ALERT CANCEL message p. 377
11.3.3.7 Implicit emergency alert cancel p. 378
