Content for TR 23.779 Word version: 13.0.0
5.5 Call control/Signalling
5.6 Floor control
5.7 Priority/Pre-emption
5.8 Service continuity
5.9 Private calls
5.10 Log on/Authentication
5.11 Group affiliation
5.12 MCPTT for Isolated E-UTRAN Operation for Public Safety (IOPS)
5.5 Call control/Signalling p. 98
5.5.1 Off-network p. 98
5.5.2 On-network p. 98
5.5.2.1 Solution 5-2-1: MCPTT group call resources allocation (alternative #1) p. 98
5.5.2.1.1 Functional description p. 98
5.5.2.1.2 Procedures p. 99
5.5.2.1.3 Impact on existing entities and interfaces p. 100
5.5.2.1.4 Solution evaluation p. 100
5.5.2.2 Solution 5-2-2: MCPTT group call resources allocation (alternative #2) p. 100
5.5.2.2.1 Functional description p. 100
5.5.2.2.2 Procedures p. 101
5.5.2.2.3 Impact on existing entities and interfaces p. 102
5.5.2.2.4 Solution evaluation p. 102
5.5.2.3 Solution 5-2-3: Solution for on-network pre-arranged group call set up p. 102
5.5.2.3.1 Functional description p. 102
5.5.2.3.2 Procedures p. 103
5.5.2.3.3 Impact on existing entities and interfaces p. 104
5.5.2.3.4 Solution evaluation p. 104
5.5.2.4 Solution 5-2-4: Solution for on-network late call entry p. 104
5.5.2.4.1 Functional description p. 104
5.5.2.4.2 Procedures p. 105
5.5.2.4.3 Impact on existing entities and interfaces p. 106
5.5.2.4.4 Solution evaluation p. 106
5.5.2.5 Solution 5-2-5: Chat group call with implicit affiliation p. 106
5.5.2.5.1 Description p. 106
5.5.2.5.2 Procedure p. 106
5.5.2.5.3 Impact on existing entities and interfaces p. 108
5.5.2.5.4 Solution evaluation p. 108
5.5.2.6 Solution 5-2-6: MCPTT group call MBMS resources allocation p. 108
5.5.2.6.1 Functional Description p. 108
5.5.2.6.2 Procedures p. 108
5.5.2.6.3 Impact on existing entities and interfaces p. 110
5.5.2.6.4 Solution evaluation p. 110
5.5.2.7 Solution 5-2-7: Associating an MCPTT group call with a multicast bearer p. 110
5.5.2.7.1 Description p. 110
5.5.2.7.2 Procedure p. 111
5.5.2.7.3 Impact on existing entities and interfaces p. 112
5.5.2.7.4 Solution evaluation p. 112
5.5.2.8 Solution 5-2-8: group call procedures based on solution 2-4 p. 112
5.5.2.8.1 Call session setup procedure (originating) p. 112
5.5.2.8.2 Unicast call session setup procedure (terminating) p. 113
5.5.2.8.3 Unicast call session leave procedure p. 114
5.5.2.8.4 Call release procedure (originating) p. 115
5.5.2.8.5 Unicast call release procedure (terminating) p. 115
5.5.2.8.6 Broadcast call setup procedure (terminating) p. 116
5.5.2.8.7 Broadcast call release procedure (terminating) p. 117
5.5.2.8.8 Call session join procedure p. 118
5.5.2.8.9 Impact on existing entities and interfaces p. 119
5.5.2.8.10 Solution evaluation p. 119
5.5.2.9 Solution 5-2-9: pre-established session p. 119
5.5.2.9.1 Functional description p. 119
5.5.2.9.2 Procedures p. 120
5.5.2.9.2.1 Pre-established session establishment p. 120
5.5.2.9.2.2 Call establishment using pre-established session p. 123
5.5.2.9.2.3 Leaving an MCPTT call p. 137
5.5.2.9.2.4 Pre-established session Modification p. 140
5.5.2.9.2.5 Removing the pre-established session p. 140
5.5.2.9.3 Impact on existing entities and interfaces p. 140
5.5.2.9.4 Solution evaluation p. 140
5.6 Floor control p. 140
5.6.1 Off-network p. 140
5.6.1.1 Solution 6-1-1: Limited precedence based; Off-network floor control p. 140
5.6.1.1.1 Dynamic nature of communication off-network p. 140
5.6.1.1.2 Philosophy p. 141
5.6.1.1.3 Assumptions p. 141
5.6.1.1.4 Functional description p. 142
5.6.1.1.4.1 Initial communication p. 143
5.6.1.1.4.2 Ongoing communication p. 145
5.6.1.1.4.3 Late joining p. 145
5.6.1.1.4.4 Ending a communication p. 145
5.6.1.1.4.5 Action in support of seconds p. 146
5.6.1.1.4.6 Contention resolution p. 148
5.6.1.1.4.7 Contending for resource p. 148
5.6.1.1.4.8 For further study p. 149
5.6.1.1.5 Impact on existing entities and interfaces p. 149
5.6.1.1.6 Solution evaluation p. 149
5.6.1.2 Solution 6-1-2: Options for off-network floor control p. 149
5.6.1.2.1 Functional description p. 149
5.6.1.2.2 Discovery scenarios and message formats p. 150
5.6.1.2.2.1 Full member visibility p. 150
5.6.1.2.2.2 Partial member visibility p. 151
5.6.1.2.2.3 Limited member visibility p. 152
5.6.1.2.2.4 Discovery message format p. 153
5.6.1.2.3 Floor control p. 154
5.6.1.2.4 Procedures p. 157
5.6.1.2.5 Session model for off-network MCPTT call p. 157
5.6.1.2.6 Functional elements p. 158
5.6.1.2.7 Off-network flow diagram p. 159
5.6.1.2.7.1 Background and assumptions p. 159
5.6.1.2.7.2 Session setup p. 159
5.6.1.2.7.3 Joining an already existing session p. 160
5.6.1.2.7.4 Leaving a session p. 160
5.6.1.2.7.5 Session termination due to inactivity p. 161
5.6.1.2.8 Impact on existing entities and interfaces p. 161
5.6.1.2.9 Solution evaluation p. 161
5.6.1.3 Solution 6-1-3: Floor control procedure for off-network and off-network with ProSe UE-to-UE relay p. 161
5.6.2 On-network p. 162
5.6.2.1 Solution 6-2-1: Solution for on-network floor control (alternative #1) p. 162
5.6.2.1.1 Functional description p. 162
5.6.2.1.2 Procedures p. 163
5.6.2.1.3 Impact on existing entities and interfaces p. 163
5.6.2.1.4 Solution evaluation p. 163
5.6.2.2 Solution 6-2-2: Solution for on-network floor control (alternative #2) p. 163
5.7 Priority/Pre-emption p. 166
5.7.1 Solution 7-1: Messages to be broadcast p. 166
5.7.1.1 Functional description p. 166
5.7.1.1.1 Problem statement p. 166
5.7.1.1.2 List of messages p. 166
5.7.1.1.2.1 Call related messages p. 166
5.7.1.1.2.2 Floor control related messages p. 167
5.7.1.1.2.3 Summary of messages p. 167
5.7.1.1.3 Content of broadcast messages p. 167
5.7.1.2 Procedures p. 168
5.7.1.3 Impact on existing entities and interfaces p. 168
5.7.1.4 Solution evaluation p. 168
5.7.2 Solution 7-2: Preliminary setup of unicast media IP connectivity p. 168
5.8 Service continuity p. 171
5.8.1 Solution 8-1: SIP-based service continuity between on-network and UE-to-network relay p. 171
5.8.1.1 Functional description p. 171
5.8.1.2 Procedures p. 171
5.8.1.2.1 General p. 171
5.8.1.2.2 MCPTT service continuity from on-network to UE-to-network relay p. 172
5.8.1.3 Impact on existing entities and interfaces p. 173
5.8.1.4 Solution evaluation p. 173
5.8.2 Solution 8-2: SIP-based service continuity between EPC path and ProSe communication path p. 174
5.8.2.1 Functional description p. 174
5.8.2.1.1 General p. 174
5.8.2.1.2 System architecture p. 174
5.8.2.1.3 Shortcomings with existing IMS service continuity mechanisms p. 175
5.8.2.1.4 Proposed solution p. 175
5.8.2.2 Procedures p. 175
5.8.2.2.1 General p. 175
5.8.2.2.2 MCPTT service continuity from EPC path to ProSe Communication path p. 176
5.8.2.3 Impact on existing entities and interfaces p. 177
5.8.2.4 Solution evaluation p. 177
5.9 Private calls p. 177
5.9.1 Off-network p. 177
5.9.2 On-network p. 178
5.9.2.1 Solution 9-2-1: Support for MCPTT on-network private calls (with floor control) p. 178
5.9.2.1.1 Functional description p. 178
5.9.2.1.2 Procedures p. 178
5.9.2.1.3 Impact on existing entities and interfaces p. 180
5.9.2.1.4 Solution evaluation p. 180
5.9.2.2 Solution 9-2-2: Support for private calls without floor control p. 180
5.10 Log on/Authentication p. 180
5.11 Group affiliation p. 182
5.11.1 Solution 11-1: Group affiliation based on OMA XDM p. 182
5.11.1.1 Functional description p. 182
5.11.1.2 Procedures p. 184
5.11.1.3 Impact on existing entities and interfaces p. 184
5.11.1.4 Solution evaluation p. 184
5.11.2 Solution 11-2: Group affiliation based on presence and XDM p. 184
5.11.2.1 Functional description p. 184
5.11.2.2 Procedures p. 185
5.11.2.2.1 Explicit case p. 185
5.11.2.2.2 Implicit case p. 187
5.11.2.3 Impact on existing entities and interfaces p. 187
5.11.2.4 Solution evaluation p. 188
5.12 MCPTT for Isolated E-UTRAN Operation for Public Safety (IOPS) p. 188
