Content for TR 23.700-05 Word version: 18.0.0
5 Key Issues p. 11
5.1 Key Issue #1: Mobile base station relay configuration support in 5GC p. 11
5.1.1 Description p. 11
5.2 Key Issue #2: Efficient mobility for UEs connecting to/disconnecting from mobile base station relay p. 12
5.2.1 Description p. 12
5.3 Key Issue #3: Efficient mobility and service continuity when served by mobile base station relay p. 12
5.4 Key Issue #4: Support of roaming of mobile base station relays p. 13
5.5 Key Issue #5: Support of location services for UEs accessing via a mobile base station relay p. 13
5.6 Key Issue #6: Provide cell ID/TAC of mobile base station relay for services p. 14
5.7 Key Issue #7: Control of UE's access to 5GS via a mobile base station relay p. 14
6 Solutions p. 15
6.0 Mapping of solutions to key issues p. 15
6.1 Solution #1: Subscription data and O&M based mobile IAB-node configuration p. 15
6.1.1 Introduction p. 15
6.1.2 Functional Description p. 15
6.1.3 Procedures p. 16
6.1.4 Impacts on services, entities, and interfaces p. 16
6.2 Solution #2: Solution for provisioning and policy control of mobile base station relays p. 16
6.2.1 General p. 16
6.2.2 Functional descriptions p. 16
6.2.3 Procedures p. 18
6.2.4 Impacts on services, entities, and interfaces p. 18
6.3 Solution #3: Reusing existing procedures for UE mobility p. 18
6.3.1 General p. 18
6.3.2 Functional descriptions p. 18
6.3.3 Procedures p. 19
6.3.3.1 UE mobility between mobile base station relays p. 19
6.3.3.2 UE mobility between mobile base station relay and macro base station p. 19
6.3.4 Impacts on services, entities, and interfaces p. 19
6.4 Solution #4: Stop mobility registration when moving with mobile base station relay p. 20
6.4.1 General p. 20
6.4.2 Functional descriptions p. 21
6.4.3 Procedures p. 22
6.4.3.1 UE performs Service Request or Registration Request via Mobile Base Station Relay p. 22
6.4.3.2 Mobile Base Station Relay mobility registration procedure with UEs p. 23
6.4.3.3 Mobile Base Station Relay handover with UEs p. 24
6.4.4 Impacts on services, entities and interfaces. p. 26
6.5 Solution #5: Mobile termination procedure due to mobility p. 27
6.5.1 General p. 27
6.5.2 Functional descriptions p. 27
6.5.3 Procedures p. 28
6.5.3.1 UE performs Service Request or Registration Request via Mobile Base Station Relay p. 28
6.5.3.2 UE handover to connect/disconnect to/from Mobile Base Station Relay with AMF change p. 30
6.5.3.3 Mobile Base Station Relay mobility registration procedure with AMF change p. 32
6.5.3.4 Mobile Base Station Relay handover with UEs with AMF change p. 33
6.5.3.5 Mobile termination when UE moves with Mobile Base Station Relay p. 35
6.5.4 Impacts on services, entities and interfaces. p. 36
6.6 Solution #6: Enabling roaming of mobile base station relays p. 36
6.6.1 General p. 36
6.6.2 Functional description p. 36
6.6.3 Signalling flows p. 38
6.6.3.1 Signalling flow for roaming of mobile base station relay using IAB node integration procedure p. 38
6.6.3.2 Signalling flow for roaming of mobile base station relay using inter-IAB-donor gNB mobility procedure p. 39
6.6.4 Impacts on services, entities and interfaces p. 39
6.7 Solution #7: Network based Positioning of mobile base station relay for location services p. 40
6.7.1 General p. 40
6.7.2 Functional descriptions p. 40
6.7.3 Procedures p. 41
6.7.4 Impacts on services, entities, and interfaces p. 44
6.8 Solution #8: Support of positioning for UE accessing via mobile base station relay p. 44
6.8.1 General p. 44
6.8.2 Functional Descriptions p. 45
6.8.3 Positioning procedure for UE accessing via mobile base station relay p. 45
6.8.4 Impacts on services, entities, and interfaces p. 47
6.9 Solution #9: User location information based on IAB-UE p. 47
6.9.1 Introduction p. 47
6.9.2 Functional Description p. 47
6.9.3 Procedures p. 47
6.9.4 Impacts on services, entities and interfaces p. 48
6.10 Solution #10: configuration of Mobile Base Station Relays in roaming p. 48
6.10.1 Introduction p. 48
6.10.2 Functional Description p. 48
6.10.3 Procedures p. 50
6.10.4 Impacts on services, entities and interfaces p. 50
6.11 Solution #11: Service time of Mobile Base Station Relay p. 51
6.11.1 General p. 51
6.11.2 Functional descriptions p. 51
6.11.3 Procedures p. 51
6.11.3.1 Mobile Base Station Relay broadcast service time p. 51
6.11.3.2 Conditional handover according to service time of Mobile Base Station Relay p. 52
6.11.4 Impacts on services, entities and interfaces. p. 52
6.12 Solution #12: IAB-node mobility with connected UEs p. 53
6.12.1 General p. 53
6.12.2 Functional descriptions p. 53
6.12.3 Procedures p. 53
6.12.3.1 IAB-node mobility with change of IAB-donor gNB via Xn p. 53
6.12.3.2 IAB-node mobility with change of IAB-donor gNB via N2 p. 55
6.12.4 Impacts on services, entities, and interfaces p. 58
6.13 Solution #13: IAB optimization for Mobile Base Station Relays support p. 58
6.13.1 Introduction p. 58
6.13.2 Functional Description p. 58
6.13.3 Procedures p. 60
6.13.4 Impacts on services, entities and interfaces p. 62
6.14 Solution #14: Support of location services for UEs accessing via a mobile IAB node p. 62
6.14.1 Introduction p. 62
6.14.2 Functional Description p. 62
6.14.3 Procedures p. 63
6.14.4 Impacts on services, entities and interfaces p. 64
6.15 Solution #15: Support of location services for MBSR access with provision of MBSR Location and RAT dependent positioning p. 64
6.15.1 Introduction p. 64
6.15.2 Functional Description p. 65
6.15.3 Positioning Procedure p. 65
6.15.4 Impacts on services, entities, and interfaces p. 68
6.16 Solution #16: UE mobility management in case of IAB-node mobility with dynamic TAC provisioning p. 68
6.16.1 Introduction p. 68
6.16.2 Functional Description p. 69
6.16.3 Procedures p. 70
6.16.4 Impacts on services, entities, and interfaces p. 70
6.17 Solution #17: IAB-node mobility with dedicated TAC p. 71
6.17.1 Introduction p. 71
6.17.2 Functional Description p. 71
6.17.2.1 TAC broadcasted by the MBSR is unchanged during mobility p. 71
6.17.2.2 Using same TAC within a certain service area p. 73
6.17.3 Procedures p. 75
6.17.3.1 Procedures if the TAC broadcasted by the MBSR is unchanged during mobility p. 75
6.17.3.1.1 Procedure of intra UE-AMF mobility p. 75
6.17.3.1.2 Procedure of inter UE-AMF mobility p. 77
6.17.3.2 Procedures using same TAC within a certain service area p. 78
6.17.4 Impacts on services, entities, and interfaces p. 78
6.18 Solution #18: Solution for UE location service via mobile IAB-node p. 79
6.18.1 General p. 79
6.18.2 Functional descriptions p. 79
6.18.3 Procedures p. 79
6.18.4 Impacts on services, entities, and interfaces p. 80
6.19 Solution #19: Solution for location privacy check for Mobile Base Station Relay p. 81
6.19.1 General p. 81
6.19.2 Functional descriptions p. 81
6.19.3 Procedures p. 82
6.19.4 Impacts on services, entities, and interfaces p. 82
6.20 Solution #20: CAG based UE access control via MBSR p. 82
6.20.1 Introduction p. 82
6.20.2 Functional Description p. 82
6.20.2.0 General p. 82
6.20.2.1 CAG identifier of MBSR p. 82
6.20.2.2 UE CAG configuration p. 83
6.20.2.3 Access control p. 83
6.20.3 Procedures p. 83
6.20.3.1 General p. 83
6.20.4 Impacts on services, entities and interfaces p. 83
7 Evaluation p. 84
7.1 Evaluations for KI#1 p. 84
7.2 Evaluations for KI#2 p. 84
7.3 Evaluations for KI#3 p. 85
7.4 Evaluations for KI#4 p. 86
7.5 Evaluations for KI#5 p. 86
7.6 Evaluations for KI#6 p. 88
7.7 Evaluation for KI#7 p. 89
7.7.1 General p. 89
7.7.2 Evaluation on solutions p. 89
8 Conclusions p. 89
8.1 Conclusions for KI#1 p. 89
8.2 Conclusions for KI#2 p. 90
8.3 Conclusions for KI#3 p. 90
8.4 Conclusions for KI#4 p. 90
8.5 Conclusions for KI#5 p. 91
8.6 Conclusions for KI#6 p. 92
8.7 Conclusions for KI#7 p. 92
$ Change history p. 94
