Content for TS 24.379 Word version: 18.1.0
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6.3.3 Controlling MCPTT function
6.3.4 Non-controlling MCPTT function of an MCPTT group
6.3.5 Retrieving and processing a group document
6.3.6 Affiliation check
6.3.7 Error handling
6.3.8 Session release policy
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6.3.3 Controlling MCPTT function p. 112
6.3.3.1 Request initiated by the controlling MCPTT function p. 112
6.3.3.1.1 SDP offer generation p. 112
6.3.3.1.2 Sending an INVITE request p. 112
6.3.3.1.3 Receipt of a SIP response to a SIP INVITE request p. 113
6.3.3.1.3.1 Final response p. 113
6.3.3.1.4 Void
6.3.3.1.5 Sending a SIP BYE request p. 113
6.3.3.1.6 Sending a SIP re-INVITE request for MCPTT emergency group call p. 114
6.3.3.1.7 Sending a SIP INVITE request for MCPTT emergency group call p. 115
6.3.3.1.8 Sending a SIP UPDATE request for Resource-Priority header field correction p. 116
6.3.3.1.9 Generating a SIP re-INVITE request p. 117
6.3.3.1.10 Generating a SIP re-INVITE request to cancel an in-progress emergency p. 117
6.3.3.1.11 Generating a SIP MESSAGE request for notification of in-progress emergency or imminent peril status change p. 117
6.3.3.1.12 Populate mcptt-info and location-info MIME bodies for emergency alert p. 118
6.3.3.1.13 Authorisations p. 118
6.3.3.1.13.1 Determining authorisation for initiating an MCPTT emergency alert p. 118
6.3.3.1.13.2 Determining authorisation for initiating an MCPTT emergency group or private call p. 119
6.3.3.1.13.3 Determining authorisation for cancelling an MCPTT emergency alert p. 120
6.3.3.1.13.4 Determining authorisation for cancelling an MCPTT emergency call p. 121
6.3.3.1.13.5 Determining authorisation for initiating an MCPTT imminent peril call p. 121
6.3.3.1.13.6 Determining authorisation for cancelling an MCPTT imminent peril call p. 121
6.3.3.1.13.7 Void
6.3.3.1.14 Generating a SIP 403 response for priority call request rejection p. 122
6.3.3.1.15 Sending a SIP re-INVITE request for MCPTT imminent peril group call p. 122
6.3.3.1.16 Handling the expiry of timer TNG2 (in-progress emergency group call timer) p. 122
6.3.3.1.17 Validate priority request parameters p. 123
6.3.3.1.18 Sending a SIP INFO request in the dialog of a SIP request for a priority call p. 123
6.3.3.1.19 Retrieving Resource-Priority header field values p. 124
6.3.3.1.20 Generating a SIP MESSAGE request to indicate successful receipt of an emergency alert or emergency cancellation p. 125
6.3.3.1.21 Void
6.3.3.1.22 Void
6.3.3.2 Requests terminated by the controlling MCPTT function p. 125
6.3.3.2.1 SDP answer generation p. 125
6.3.3.2.2 Receipt of a SIP INVITE request p. 126
6.3.3.2.3 Sending a SIP response to a SIP INVITE request p. 126
6.3.3.2.3.1 Provisional response p. 126
6.3.3.2.3.2 Final response p. 126
6.3.3.2.4 Receiving a SIP BYE request p. 127
6.3.3.3 Handling of the acknowledged call setup timer (TNG1) p. 127
6.3.3.4 Generating a SIP NOTIFY request p. 130
6.3.3.5 Handling of the group call timer (TNG3) p. 131
6.3.3.5.1 General p. 131
6.3.3.5.2 Interaction with the in-progress emergency group call timer (TNG2) p. 131
6.3.3.6 Void
6.3.4 Non-controlling MCPTT function of an MCPTT group p. 132
6.3.4.1 Request initiated by the non-controlling MCPTT function of an MCPTT group p. 132
6.3.4.1.1 SDP offer generation p. 132
6.3.4.1.2 Sending an INVITE request towards the MCPTT client p. 132
6.3.4.1.3 Sending a SIP INFO request p. 133
6.3.4.1.4 Sending an INVITE request towards the controlling MCPTT function p. 134
6.3.4.2 Requests terminated by the non-controlling MCPTT function of an MCPTT group p. 135
6.3.4.2.1 SDP answer generation p. 135
6.3.4.2.2 Sending a SIP response to the SIP INVITE request p. 135
6.3.4.3 Generating a SIP NOTIFY request p. 136
6.3.4.4 Void
6.3.5 Retrieving and processing a group document p. 137
6.3.5.1 General p. 137
6.3.5.2 Rules for retrieving Group Document(s) p. 137
6.3.5.3 Rules for joining a group session p. 139
6.3.5.4 Rules for initiating a prearranged group session p. 139
6.3.5.5 Determining the group members to invite p. 140
6.3.6 Affiliation check p. 141
6.3.7 Error handling p. 142
6.3.8 Session release policy p. 142
