Content for TS 24.554 Word version: 18.5.1
8 5G ProSe UE-to-network relay
8.1 Overview
8.2 Procedures
8a 5G ProSe UE-to-UE relay
8a.1 Overview
8a.2 Procedures
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8 5G ProSe UE-to-network relay p. 219
8.1 Overview p. 219
8.2 Procedures p. 219
8.2.1 UE-to-network relay discovery over PC5 interface p. 219
8.2.1.1 General p. 219
8.2.1.2 UE-to-network relay discovery over PC5 interface with model A p. 221
8.2.1.2.1 General p. 221
8.2.1.2.2 Announcing UE relay discovery for UE-to-network relay discovery p. 221
8.2.1.2.2.1 General p. 221
8.2.1.2.2.2 Announcing UE procedure for UE-to-network relay discovery initiation p. 221
8.2.1.2.2.3 Announcing UE procedure for UE-to-network relay discovery completion p. 223
8.2.1.2.3 Monitoring UE relay discovery for UE-to-network relay discovery p. 223
8.2.1.2.3.1 General p. 223
8.2.1.2.3.2 Monitoring UE procedure for UE-to-network relay discovery initiation p. 224
8.2.1.2.3.3 Monitoring UE procedure for UE-to-network relay discovery completion p. 225
8.2.1.2.4 Announcing UE procedure for relay discovery additional information p. 226
8.2.1.2.4.1 General p. 226
8.2.1.2.4.2 Announcing procedure for relay discovery additional information p. 226
8.2.1.2.5 Monitoring UE procedure for relay discovery additional information p. 228
8.2.1.3 UE-to-network relay discovery over PC5 interface with model B p. 229
8.2.1.3.1 Discoverer UE procedure for UE-to-network Relay discovery p. 229
8.2.1.3.1.1 General p. 229
8.2.1.3.1.2 Discoverer UE procedure for UE-to-network relay discovery initiation p. 229
8.2.1.3.1.3 Discoverer UE procedure for UE-to-network Relay discovery completion p. 233
8.2.1.3.2 Discoveree UE procedure for UE-to-network Relay discovery p. 233
8.2.1.4 Procedure for UE to use provisioned radio resources for 5G ProSe UE-to-network discovery p. 236
8.2.2 UE-to-network relay selection procedure p. 237
8.2.2.1 General p. 237
8.2.2.2 UE-to-network relay selection procedure initiation p. 237
8.2.2.3 UE-to-network relay selection procedure completion p. 237
8.2.3 UE-to-network relay reselection procedure p. 238
8.2.4 Procedure for UE to use provisioned radio resources for 5G ProSe UE-to-network relay communication p. 239
8.2.5 IP address allocation for 5G ProSe remote UE in 5G ProSe layer-3 UE-to-network relay procedure p. 240
8.2.5a IPv6 prefix delegation via DHCPv6 for 5G ProSe layer-3 UE-to-network relay p. 240
8.2.6 QoS handling for 5G ProSe UE-to-network relay p. 241
8.2.6.1 General p. 241
8.2.6.2 QoS handling for 5G ProSe layer-2 UE-to-network relay p. 241
8.2.6.3 QoS handling for 5G ProSe layer-3 UE-to-network relay without N3IWF p. 241
8.2.6.3.1 General p. 241
8.2.6.3.2 QoS flows handling initiated by the network p. 241
8.2.6.3.3 PC5 QoS flows handling initiated by the 5G ProSe layer-3 remote UE p. 242
8.2.6.4 QoS handling for 5G ProSe layer-3 UE-to-network relay with N3IWF p. 243
8.2.7 5G ProSe layer-3 UE-to-network relay with N3IWF support p. 244
8.2.7.1 General p. 244
8.2.7.2 5G ProSe layer-3 UE-to-network relay UE establishing PDU session to access N3IWF p. 244
8.2.7.3 N3IWF selection for 5G ProSe layer-3 remote UE p. 245
8.2.8 5G ProSe additional parameters announcement procedure p. 245
8.2.8.1 General p. 245
8.2.8.2 5G ProSe additional parameters announcement procedure initiation by the 5G ProSe layer-3 remote UE p. 245
8.2.8.3 5G ProSe additional parameters announcement procedure accepted by the 5G ProSe layer-3 UE-to-network relay UE p. 246
8.2.8.4 5G ProSe additional parameters announcement procedure completion by the 5G ProSe layer-3 remote UE p. 246
8.2.8.5 Abnormal cases p. 246
8.2.9 5G ProSe AA message reliable transport procedure p. 246
8.2.9.1 General p. 246
8.2.9.2 5G ProSe AA message reliable transport procedure initiation p. 247
8.2.9.3 5G ProSe AA message reliable transport procedure accepted by the target UE p. 247
8.2.9.4 5G ProSe AA message reliable transport procedure completion by the initiating UE p. 248
8.2.9.5 Abnormal cases p. 248
8.2.10 5G ProSe security procedures over PC8 interface p. 248
8.2.10.1 General p. 248
8.2.10.1.1 Transport protocol for PC8 messages p. 248
8.2.10.1.2 Handling of UE-initiated procedures p. 248
8.2.10.1.2.1 General p. 248
8.2.10.1.2.2 5G PKMF discovery p. 249
8.2.10.2 Procedures p. 249
8.2.10.2.1 Types of 5G ProSe procedures over PC8 interface p. 249
8.2.10.2.2 5G ProSe UE-to-network relay discovery security parameters request procedure p. 249
8.2.10.2.2.1 General p. 249
8.2.10.2.2.2 5G ProSe UE-to-network relay discovery security parameters request procedure initiation p. 249
8.2.10.2.2.3 5G ProSe UE-to-network relay discovery security parameters request procedure accepted by the 5G PKMF p. 251
8.2.10.2.2.4 5G ProSe UE-to-network relay discovery security parameters request procedure completion by the UE p. 253
8.2.10.2.2.5 5G ProSe UE-to-network relay discovery security parameters request procedure not accepted by the 5G PKMF p. 253
8.2.10.2.2.6 Abnormal cases in the UE p. 253
8.2.10.2.2.7 Abnormal cases in the 5G PKMF p. 254
8.2.10.2.3 5G ProSe remote user key request procedure p. 254
8.2.10.2.3.1 General p. 254
8.2.10.2.3.2 5G ProSe remote user key request procedure initiation p. 254
8.2.10.2.3.3 5G ProSe remote user key request procedure accepted by the 5G PKMF p. 255
8.2.10.2.3.4 5G ProSe remote user key request procedure completion by the UE p. 255
8.2.10.2.3.5 5G ProSe remote user key request procedure not accepted by the 5G PKMF p. 255
8.2.10.2.3.6 Abnormal cases in the UE p. 256
8.2.10.2.3.7 Abnormal cases in the 5G PKMF p. 256
8.2.10.2.4 Key request procedure p. 256
8.2.10.2.4.1 General p. 256
8.2.10.2.4.2 Key request procedure initiation p. 256
8.2.10.2.4.3 Key request procedure accepted by the 5G PKMF p. 257
8.2.10.2.4.4 Key request procedure completion by the UE p. 258
8.2.10.2.4.5 Key request procedure not accepted by the 5G PKMF p. 258
8.2.10.2.4.6 Abnormal cases in the UE p. 258
8.2.10.2.4.7 Abnormal cases in the 5G PKMF p. 258
8.2.11 UE-to-network relay unicast direct communication over PC5 interface p. 258
8.2.12 5G ProSe security procedures over PC3a interface p. 259
8.2.12.1 General p. 259
8.2.12.1.1 Transport protocol for PC3a messages p. 259
8.2.12.1.2 Handling of UE-initiated procedures p. 259
8.2.12.1.2.1 General p. 259
8.2.12.1.2.2 5G DDNMF discovery p. 259
8.2.12.2 Procedures p. 259
8.2.12.2.1 Types of 5G ProSe security procedures over PC3a interface p. 259
8.2.12.2.2 5G ProSe UE-to-network relay discovery security material request procedure p. 260
8.2.12.2.2.1 General p. 260
8.2.12.2.2.2 5G ProSe UE-to-network relay discovery security material request procedure initiation p. 260
8.2.12.2.2.3 5G ProSe UE-to-network relay discovery security material request procedure accepted by the 5G DDNMF p. 261
8.2.12.2.2.4 5G ProSe UE-to-network relay discovery security material request procedure completion by the UE p. 263
8.2.12.2.2.5 5G ProSe UE-to-network relay discovery security material request procedure not accepted by the 5G DDNMF p. 263
8.2.12.2.2.6 Abnormal cases in the UE p. 263
8.2.12.2.2.7 Abnormal cases in the 5G DDNMF p. 264
8.2.13 Communication path switching between 5G ProSe UE-to-network relays p. 264
8.2.13.1 General p. 264
8.2.13.2 Target UE-to-network relay discovery and selection for communication path switching p. 264
8.2.13.3 Path switching to 5G ProSe layer-3 UE-to-network relay without N3IWF p. 265
8.2.13.4 Path switching to 5G ProSe layer-3 UE-to-network relay with N3IWF p. 265
8.2.13.5 Path switching to 5G ProSe layer-2 UE-to-network relay p. 265
8.2.14 5G ProSe public warning notification relay procedure p. 266
8.2.14.1 General p. 266
8.2.14.2 5G ProSe public warning notification relay procedure initiation for 5G ProSe layer-3 UE-to-network relay p. 266
8.2.14.3 Reception of 5G ProSe public warning notification relay message p. 267
8.2.15 Multi-path communication via a PDU session and via 5G ProSe UE-to-network relay p. 267
8a 5G ProSe UE-to-UE relay p. 268
8a.1 Overview p. 268
8a.2 Procedures p. 268
8a.2.1 5G ProSe UE-to-UE relay discovery over PC5 interface p. 268
8a.2.1.1 General p. 268
8a.2.1.2 UE-to-UE relay discovery over PC5 interface with model A p. 269
8a.2.1.2.1 General p. 269
8a.2.1.2.2 Announcing UE relay discovery for UE-to-UE relay discovery p. 269
8a.2.1.2.2.1 General p. 269
8a.2.1.2.2.2 Announcing UE procedure for UE-to-UE relay discovery initiation p. 269
8a.2.1.2.2.3 Announcing UE procedure for UE-to-UE relay discovery completion p. 271
8a.2.1.2.3 Monitoring UE relay discovery for UE-to-UE relay discovery p. 272
8a.2.1.3 UE-to-UE relay discovery over PC5 interface with model B p. 274
8a.2.1.3.1 General p. 274
8a.2.1.3.2 Discoverer end UE procedure for UE-to-UE Relay discovery p. 274
8a.2.1.3.2.1 General p. 274
8a.2.1.3.2.2 Discoverer end UE procedure for UE-to-UE relay discovery initiation p. 274
8a.2.1.3.2.3 Discoverer end UE procedure for UE-to-UE relay discovery completion p. 277
8a.2.1.3.3 Relay UE procedure for UE-to-UE Relay discovery p. 277
8a.2.1.3.3.1 General p. 277
8a.2.1.3.3.2 Relay UE procedure for UE-to-UE relay discovery initiation p. 278
8a.2.1.3.3.3 Relay UE procedure for UE-to-UE relay discovery completion p. 281
8a.2.1.3.4 Discoveree end UE procedure for UE-to-UE Relay discovery p. 282
8a.2.2 5G ProSe UE-to-UE relay selection procedure p. 284
8a.2.2.1 General p. 284
8a.2.2.2 UE-to-UE relay selection procedure initiation p. 284
8a.2.2.3 UE-to-UE relay selection procedure completion p. 285
8a.2.3 5G ProSe UE-to-UE relay reselection procedure p. 285
8a.2.3.1 General p. 285
8a.2.3.2 UE-to-UE relay reselection procedure initiation p. 285
8a.2.3.3 Candidate 5G ProSe UE-to-UE relay discovery procedure p. 286
8a.2.4 5G ProSe UE-to-UE relay unicast direct communication over PC5 interface p. 287
8a.2.5 IP address allocation for 5G ProSe end UE in 5G ProSe layer-3 UE-to-UE relay procedure p. 287
8a.2.6 Security procedures for 5G ProSe layer-2 end UEs p. 288
8a.2.7 QoS handling for 5G ProSe UE-to-UE relay p. 288
8a.2.7.1 General p. 288
8a.2.7.2 QoS handling for 5G ProSe layer-3 UE-to-UE relay p. 288
8a.2.7.2.1 General p. 288
8a.2.7.2.2 PC5 QoS flows handling initiated by the source 5G ProSe layer-3 end UE p. 288
8a.2.7.3 QoS handling for 5G ProSe layer-2 UE-to-UE relay p. 289
8a.2.8 Support for Ethernet traffic via 5G ProSe layer-3 UE-to-UE relay p. 289
8a.2.9 5G ProSe AA message reliable transport procedure p. 290
8a.2.10 5G ProSe UE-to-UE relay direct link security establishment procedure p. 290
8a.2.10.1 General p. 290
8a.2.10.2 5G ProSe UE-to-UE relay direct link security establishment procedure initiation by initiating UE p. 290
8a.2.10.3 5G ProSe UE-to-UE relay direct link security establishment procedure accepted by the target UE p. 292
8a.2.10.4 5G ProSe UE-to-UE relay direct link security establishment procedure completion by the initiating UE p. 293
8a.2.10.5 5G ProSe UE-to-UE relay direct link security establishment procedure not accepted by the target UE p. 293
8a.2.10.6 Abnormal cases p. 295
8a.2.11 5G ProSe security procedures over PC3a interface for 5G ProSe UE-to-UE relay p. 295
8a.2.11.1 General p. 295
8a.2.11.1.1 Transport protocol for PC3a messages p. 295
8a.2.11.1.2 Handling of UE-initiated procedures p. 295
8a.2.11.2 Procedures p. 295
8a.2.11.2.1 Types of 5G ProSe security procedures over PC3a interface for 5G ProSe UE-to-UE relay p. 295
8a.2.11.2.2 5G ProSe UE-to-UE relay discovery security material request procedure p. 296
8a.2.11.2.2.1 General p. 296
8a.2.11.2.2.2 5G ProSe UE-to-UE relay discovery security material request procedure initiation p. 296
8a.2.11.2.2.3 5G ProSe UE-to-UE relay discovery security material request procedure accepted by the 5G DDNMF p. 297
8a.2.11.2.2.4 5G ProSe UE-to-UE relay discovery security material request procedure completion by the UE p. 299
8a.2.11.2.2.5 5G ProSe UE-to-UE relay discovery security material request procedure not accepted by the 5G DDNMF p. 299
8a.2.11.2.2.6 Abnormal cases in the UE p. 299
8a.2.11.2.2.7 Abnormal cases in the 5G DDNMF p. 300
8a.2.12 5G ProSe security procedures over PC8 interface for 5G ProSe UE-to-UE relay p. 300
8a.2.12.1 General p. 300
8a.2.12.1.1 Transport protocol for PC8 messages p. 300
8a.2.12.1.2 Handling of UE-initiated procedures p. 300
8a.2.12.2 Procedures p. 300
8a.2.12.2.1 Types of 5G ProSe security procedures over PC8 interface for 5G ProSe UE-to-UE relay p. 300
8a.2.12.2.2 5G ProSe UE-to-UE relay discovery security material request procedure p. 301
8a.2.12.2.2.1 General p. 301
8a.2.12.2.2.2 5G ProSe UE-to-UE relay discovery security material request procedure initiation p. 301
8a.2.12.2.2.3 5G ProSe UE-to-UE relay discovery security material request procedure accepted by the 5G PKMF p. 302
8a.2.12.2.2.4 5G ProSe UE-to-UE relay discovery security material request procedure completion by the UE p. 304
8a.2.12.2.2.5 5G ProSe UE-to-UE relay discovery security material request procedure not accepted by the 5G PKMF p. 304
8a.2.12.2.2.6 Abnormal cases in the UE p. 304
8a.2.12.2.2.7 Abnormal cases in the 5G PKMF p. 305
8a.2.12.2.3 5G ProSe end UE key request procedure p. 305
8a.2.12.2.4 5G ProSe UE-to-UE relay UE key request procedure p. 305
8a.2.13 5G ProSe direct discovery set transfer procedure p. 305
