Content for TR 23.703 Word version: 12.0.0
6.3 ProSe Relays
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6.3 ProSe Relays p. 170
6.3.1 Solution R1: Relay enabling and configuration for Public Safety p. 170
6.3.1.1 Functional description p. 170
6.3.1.2 Procedures p. 171
6.3.1.3 Impact on existing entities and interfaces p. 171
6.3.1.4 Solution evaluation p. 171
6.3.2 Solution R2: UE-UE Relay using IP Routing and Forwarding p. 172
6.3.2.1 Functional Description p. 172
6.3.2.2 Procedures p. 173
6.3.2.3 Impact on existing entities and interfaces p. 173
6.3.2.4 Solution evaluation p. 173
6.3.3 Solution R3: UE-Network Relay using Layer 3 Routing based on EPS Bearer (lend me a EPS bearer) p. 174
6.3.3.1 Functional Description p. 174
6.3.3.2 Procedures p. 174
6.3.3.3 Impact on existing entities and interfaces p. 175
6.3.3.4 Solution evaluation p. 175
6.3.4 Solution R4: UE-to-UE Relay operating at the application layer p. 176
6.3.4.1 Functional Description p. 176
6.3.4.1.1 Solution Description p. 176
6.3.4.1.2 Architecture reference model p. 176
6.3.4.1.3 GCSE Group and ProSe Group relationship p. 177
6.3.4.2 Procedures p. 177
6.3.4.2.1 General p. 177
6.3.4.2.2 Relay discovery and ProSe Group joining p. 177
6.3.4.2.3 SIP client registration and GCSE Group communication setup p. 178
6.3.4.2.4 Floor control procedure p. 179
6.3.4.3 Impact on existing entities and interfaces p. 179
6.3.4.4 Solution evaluation p. 179
6.3.5 Solution R5: Solution for Public Safety UE-to-UE Relays p. 180
6.3.5.1 Functional description p. 180
6.3.5.2 Communication path establish procedure p. 180
6.3.5.3 Communication path via a UE-to-UE relay p. 182
6.3.5.4 Impact on existing entities and interfaces p. 182
6.3.5.5 Solution evaluation p. 182
6.3.6 Solution R6: ProSe Relay as v4/v6 IP router with application level gateway functions p. 182
6.3.6.1 Functional description p. 182
6.3.6.1.1 General p. 182
6.3.6.1.2 ProSe UE-to-UE relay p. 182
6.3.6.1.3 ProSe UE-to-Network relay p. 183
6.3.6.1.4 ProSe Link establishment to a ProSe relay p. 183
6.3.6.1.5 Routing of traffic in ProSe relays p. 184
6.3.6.1.6 IP address assignment and networking p. 184
6.3.6.1.7 Interactions with GCSE_LTE and other applications. p. 184
6.3.6.2 Procedures p. 185
6.3.6.3 Impact on existing entities and interfaces p. 186
6.3.6.4 Solution evaluation p. 186
6.3.7 Solution R7: GCSE architecture with UE-to-Network Relay p. 186
6.3.7.1 Functional Description p. 186
6.3.7.1.1 Solution Description p. 186
6.3.7.1.2 Architecture reference model p. 186
6.3.7.1.3 GCSE Group and ProSe Group relationship p. 187
6.3.7.2 Procedures p. 187
6.3.7.2.1 General p. 187
6.3.7.2.2 Relay discovery and ProSe Group joining p. 187
6.3.7.2.3 GCSE client registration and GCSE Group communication setup p. 188
6.3.7.3 Impact on existing entities and interfaces p. 190
6.3.7.4 Solution evaluation p. 190
6.3.8 Solution R8: Application layer based ProSe Relay p. 191
6.3.8.1 Functional description p. 191
6.3.8.2 Procedures p. 192
6.3.8.3 Impact on existing entities and interfaces p. 193
6.3.8.4 Solution evaluation p. 193
6.3.9 Solution R9: Reuse of Architecture A1 from TR 36.806 p. 193
6.3.9.1 Functional description p. 193
6.3.9.2 Procedures p. 194
6.3.9.2.1 General p. 194
6.3.9.2.2 Relay Node Operation with PC9 interface based on PC5 p. 196
6.3.9.2.3 Relay Node Operation with PC9 interface based on Uu p. 197
6.3.9.3 Impact on existing entities and interfaces p. 198
6.3.9.4 Solution evaluation p. 198
6.3.10 Solution R10: L2 ProSe UE-to-Network Relay with Bearer sharing p. 198
6.3.10.1 Functional description p. 198
6.3.10.2 Procedures p. 200
6.3.10.2.1 PDN connection establishment p. 200
6.3.10.2.2 Dedicated Bearer Establishment p. 202
6.3.10.2.3 Relationship with GCSE p. 203
6.3.10.3 Impact on existing entities and interfaces p. 203
6.3.10.4 Solution evaluation p. 203
6.3.11 Solution R11: ProSe UE-to-Network Relay as IP router p. 203
6.3.11.1 Functional description p. 203
6.3.11.2 Procedures p. 205
6.3.11.2.1 Unicast traffic support p. 205
6.3.11.2.2 Multicast/Broadcast traffic support with eMBMS to the Relay p. 206
6.3.11.2.3 Multicast/Broadcast traffic support using IP Multicast on Relay p. 207
6.3.11.3 Impact on existing entities and interfaces p. 208
6.3.11.3.1 Impacts from Unicast Traffic Support p. 208
6.3.11.3.2 Impacts from Multicast/Broadcast traffic support using eMBMS to Relay p. 208
6.3.11.3.3 Impacts from Multicast/Broadcast traffic support using IP Multicast on Relay p. 208
6.3.11.4 Solution evaluation p. 208
6.3.12 Solution R12: UE-to-Network relay with network authorization p. 208
6.3.12.1 General p. 208
6.3.12.2 Procedures p. 208
6.3.12.2.1 Overall phases for UE-to-Network relay communication p. 208
6.3.12.2.2 UE-to-Network Relay UE activation p. 209
6.3.12.2.3 Discovery and selection of UE-to-Network relay p. 210
6.3.12.2.4 Establishment of UE-to-Network relay connection p. 211
6.3.12.2.5 Multicast support via UE-to-Network relay p. 211
6.2.12.3 Impact on existing entities and interfaces p. 211
6.2.12.4 Solution evaluation p. 211
6.3.13 Solution R13: ProSe Relay selection p. 212
6.3.13.1 General p. 212
6.3.13.2 Functional description p. 212
6.3.13.3 Procedures p. 212
6.3.13.4 Impact on existing entities and interfaces p. 213
6.3.13.5 Solution evaluation p. 213
