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Content for TS 24.379 Word version: 18.7.0

1… 4… 6… 6.3… 6.3.3… 6.4… 7… 9… 9A… 10… 10.1.2 10.1.3… 10.2… 10.2.3… 11… 11.1.5… 11.2… 11.2.3 12… 13… 15… A… F… G… I… J…

4 General p. 38

4.1 MCPTT overview p. 38

4.2 URI and address assignments p. 39

4.3 MCPTT speech p. 39

4.4 Warning Header Field p. 39

4.4.1 General p. 39

4.4.2 Warning texts p. 39

4.5 MCPTT session identity p. 45

4.6 MCPTT priority calls and alerts p. 46

4.6.1 MCPTT emergency group calls p. 46

4.6.2 MCPTT emergency private calls p. 47

4.6.3 MCPTT emergency alerts p. 48

4.6.4 MCPTT imminent peril group call p. 49

4.7 Communication security p. 50

4.7.1 Media security p. 50

4.7.2 Signalling security p. 51

4.8 Protection of sensitive application data p. 53

4.9 Pre-established session p. 56

4.10 MCPTT client ID p. 57

4.11 Off-network MCPTT p. 57

4.12 Broadcast Group Calls p. 57

4.13 MCPTT Resource Management p. 57

5 Functional entities p. 58

5.1 Introduction p. 58

5.2 MCPTT client p. 58

5.3 MCPTT server p. 59

5.3.1 General p. 59

5.3.2 Functional connectivity models p. 60

5.3.3 Failure case p. 62

5.3.4 Management of MBMS bearers p. 62

5.3.5 Management of MBS sessions p. 62

5.4 MCPTT UE-to-network relay p. 63

5.5 MCPTT gateway server p. 63

5.5.1 General p. 63

5.5.2 Functional connectivity models p. 63

5.6 MCPTT gateway UE p. 64

5.6.1 General p. 64

5.6.2 Functional connectivity models p. 64

5.6.3 QoS for MCPTT gateway UE p. 65