Content for TR 23.700-06 Word version: 19.0.0
5 Key Issues p. 11
5.1 Key Issue #1: Architectural enhancements for the support of a MWAB p. 11
5.2 Key Issue #2: Authorization of a MWAB and configuration of MWAB p. 11
5.3 Key Issue #3: Control of UE's access to 5GS via a wireless access backhaul p. 11
5.4 Key Issue #4: Efficient mobility and service continuity when served by MWAB p. 12
5.5 Key Issue #5: Support of location services for UEs when MWAB(s) is involved p. 13
5.6 Key Issue #6: Support of Emergency services for UEs via a MWAB p. 13
6 Solutions p. 13
6.0 Mapping of solutions to key issues p. 13
6.1 Solution #1: Architecture enhancements to support MWAB operations p. 14
6.1.1 General p. 14
6.1.2 Functional descriptions p. 16
6.1.3 Procedures p. 17
6.1.3.1 MWAB-UE registration and authorization p. 17
6.1.3.2 Control of UE's access to MWAB p. 17
6.1.3.3 Support of Location Service for UEs when MWAB(s) is involved p. 17
6.1.3.4 UE mobility to and from a MWAB cell p. 17
6.1.4 Impacts on services, entities, and interfaces p. 18
6.2 Solution #2: MWAB architecture and procedures p. 18
6.2.1 General p. 18
6.2.2 Functional descriptions p. 18
6.2.2.1 Connection with OAM server over PDU session p. 18
6.2.2.2 N2 connection over BH PDU session p. 18
6.2.2.3 N3 over BH PDU session p. 19
6.2.2.4 Xn over BH PDU session p. 19
6.2.2.5 Handling of NG establishment with respect to the topic of multi-hop handling p. 19
6.2.3 Procedures p. 20
6.2.3.1 Connection with OAM server over PDU session p. 20
6.2.3.2 N2 connection over BH PDU session p. 20
6.2.3.3 N3 connection over BH PDU session p. 21
6.2.3.4 Xn connection over BH PDU session p. 21
6.2.3.5 Alternative handling of N2 transmission by using dedicated IP address for MWAB-gNB p. 21
6.2.3.6 MWAB NG-establishment p. 21
6.2.3.7 MWAB-UE registration over other MWAB-gNB p. 22
6.2.3.8 MWAB-UE N2 handover and multi-hop handling p. 22
6.2.3.9 MWAB-UE Xn handover and multi-hop handling p. 22
6.2.4 Impacts on services, entities, and interfaces p. 23
6.3 Solution #3: N3 backhaul PDU session management p. 24
6.3.1 General p. 24
6.3.2 Functional descriptions p. 24
6.3.3 Procedures p. 25
6.3.4 Impacts on services, entities, and interfaces p. 26
6.4 Solution #4: MWAB authorization handling p. 26
6.4.1 Introduction p. 26
6.4.2 Functional Description p. 26
6.4.3 Procedures p. 27
6.4.3.1 MWAB node authorization and operation initiation p. 27
6.4.3.2 MWAB authorization status change for Registered MWAB p. 28
6.4.4 Impacts on services, entities, and interfaces p. 30
6.5 Solution #5: Authorization and Change of Authorization of a MWAB and configuration of a MWAB p. 30
6.5.1 General p. 30
6.5.2 Functional descriptions p. 30
6.5.3 Procedures p. 31
6.5.3.1 MWAB service authorization and MWAB gNB configuration p. 31
6.5.3.2 MWAB change of service authorization p. 32
6.5.4 Impacts on services, entities, and interfaces p. 33
6.6 Solution #6: Reusing CAG mechanism for managing UE's access to MWAB-gNB p. 33
6.6.1 Key Issue mapping p. 33
6.6.2 Functional Description p. 33
6.6.3 Procedures p. 34
6.6.4 Impacts on existing services, entities and interfaces p. 35
6.7 Solution #7: Architecture enhancement to support MWAB-gNB for SNPN p. 35
6.7.1 General p. 35
6.7.2 Functional descriptions p. 37
6.7.3 Control of UE's access to MWAB p. 37
6.7.4 Procedures p. 37
6.7.5 Impacts on services, entities, and interfaces p. 37
6.8 Solution #8: Provisioning of efficient mobility and service continuity when served by MWAB p. 38
6.8.1 Key Issue mapping p. 38
6.8.2 Functional Description p. 38
6.8.3 Procedures p. 39
6.8.4 Impacts on existing services, entities and interfaces p. 40
6.9 Solution #9: UE mobility handling due to MWAB mobility p. 41
6.9.1 Introduction p. 41
6.9.2 Functional Description p. 41
6.9.3 Procedures p. 43
6.9.3.1 Impact on UEs served by a MWAB upon mobility of MWAB or mobility of UE with respect to the MWAB p. 43
6.9.3.2 Impact on the network when UEs moves together with MWAB node in the same PLMN p. 43
6.9.3.3 UEs move together with MWAB node to different PLMN p. 47
6.9.4 Impacts on services, entities, and interfaces p. 48
6.10 Solution #10: New solution to address mobility aspects of an MWAB p. 48
6.10.1 General p. 48
6.10.2 Functional descriptions p. 49
6.10.2.1 Solution for mobility aspects related to Scenario A (mobility within the same 5GC node) p. 49
6.10.2.2 Solution for mobility aspects related to Scenario B (mobility between different 5GC nodes) p. 49
6.10.3 Mobility between different 5GC nodes, when UEs are served by MWAB p. 50
6.10.4 Handover of MWAB-UE p. 53
6.10.5 Impacts on services, entities, and interfaces p. 53
6.11 Solution #11: Location services involving MWAB p. 53
6.11.1 General p. 53
6.11.2 Functional descriptions p. 53
6.11.3 Procedures p. 54
6.11.3.1 5GC-MT-LR procedure involving MWAB (same PLMN) p. 54
6.11.3.2 5GC-MT-LR procedure involving MWAB (roaming to same PLMN) p. 56
6.11.3.3 5GC-MT-LR procedure involving MWAB (different PLMN) p. 56
6.11.3.4 5GC-MO-LR Procedure involving MWAB (non-roaming and roaming to same PLMN) p. 57
6.11.3.5 5GC-MO-LR Procedure involving MWAB (different PLMN) p. 57
6.11.4 Impacts on services, entities, and interfaces p. 58
6.12 Solution #12: support of Emergency services for UEs via a MWAB p. 58
6.12.1 Key Issue mapping p. 58
6.12.2 Functional Description p. 58
6.12.3 Procedures p. 59
6.12.4 Impacts on existing services, entities and interfaces p. 60
6.13 Solution #13: Support of emergency calls in MWAB p. 60
6.13.1 General p. 60
6.13.2 Functional descriptions p. 60
6.13.3 Procedures p. 61
6.13.4 Impacts on services, entities, and interfaces p. 62
6.14 Solution #14: Graceful release of emergency services. p. 63
6.14.1 Description p. 63
6.14.2 Procedures p. 63
6.12.2.1 Procedure for graceful release of serving UEs when MWAB-UE is having active emergency PDU session p. 63
6.14.2.2 Procedure for graceful release of serving UEs when they have active emergency PDU session p. 64
6.14.3 Impacts on services, entities and interfaces p. 64
6.15 Solution #15: Protocol Stacks of backhaul link to support the N2/N3 interface for MWAB node p. 65
6.15.1 General p. 65
6.15.2 Description p. 65
6.15.3 Procedures p. 65
6.15.3.1 Protocol Stacks of backhaul link to support the N2 interface for MWAB node p. 65
6.15.3.2 Protocol Stacks backhaul link to support the N3 interface for MWAB node p. 66
6.15.4 Impacts on services, entities and interfaces p. 66
6.16 Solution #16: Support for multiple backhaul PDU sessions p. 66
7 Evaluation p. 68
8 Conclusions p. 68
8.1 KI#1: Architectural enhancements for the support of a MWAB Conclusion p. 68
8.2 KI#2: Authorization of a MWAB and configuration of MWAB Conclusion p. 69
8.3 KI#3: Control of UE's access to 5GS via a wireless access backhaul Conclusion p. 70
8.4 KI#4: Efficient mobility and service continuity when served by MWAB Conclusion p. 70
8.5 KI#5: Support of location services for UEs when MWAB(s) is involved Conclusion p. 71
8.6 KI#6: Support of Emergency services for UEs via a MWAB Conclusion p. 71
$ Change history p. 73
