Content for TR 23.740 Word version: 16.0.0
5 Key Issues p. 8
5.1 Key Issue#1: Mutually exclusive access to Network Slices p. 8
5.1.1 Description p. 8
5.2 Key issue#2: Enabling interworking for slicing between EPC and 5GC p. 9
5.2.1 Description p. 9
5.3 Key Issue#3: Access to specific Network Slices authorized and authenticated through additional User Identifiers p. 9
5.3.1 Description p. 9
6 Solutions p. 10
6.1 Solutions for KI#1 p. 10
6.1.1 Solution #1.1: Mutually Exclusive Access to Network Slices via the use of URSP p. 10
6.1.1.1 Introduction p. 10
6.1.1.2 Functional description p. 10
6.1.1.3 Procedures p. 11
6.1.1.4 Impacts on existing entities and interfaces p. 11
6.1.1.5 Evaluation p. 11
6.1.2 Solution #1.2: Mutually Exclusive Access to Network Slices via UE configuration p. 11
6.1.2.1 Introduction p. 11
6.1.2.2 Functional description p. 12
6.1.2.3 Procedures p. 12
6.1.2.4 Impacts on existing entities and interfaces p. 12
6.1.2.5 Evaluation p. 13
6.1.3 Solution #1.3: Solution to Key issue#1: Mutual exclusion awareness in UE. p. 13
6.1.3.1 Introduction p. 13
6.1.3.2 Functional description p. 14
6.1.3.3 Procedures p. 15
6.1.3.4 Impacts on existing entities and interfaces p. 18
6.1.3.5 Evaluation p. 18
6.1.4 Solution#1.4: Slicing Group Support for Mutually Exclusive Access to Network Slices p. 19
6.1.4.1 Introduction p. 19
6.1.4.1.1 Design principles p. 19
6.1.4.1.2 Working Assumptions and Concepts of Mutually Exclusive Access Slicing Group p. 19
6.1.4.2 Functional description p. 20
6.1.4.2.1 Concepts of Mutually Exclusive Access Slicing Group p. 20
6.1.4.2.2 Identification of Mutually Exclusive Access Slicing Group p. 21
6.1.4.2.3 UE Support for Mutually Exclusive Access Slicing Group p. 22
6.1.4.2.4 Roaming Support for Mutually Exclusive Access Slicing Group p. 22
6.1.4.2.5 URSP/NSSP Support for Mutually Exclusive Access Slicing Group p. 23
6.1.2.4.6 AMF Support for Mutually Exclusive Access Slicing Group p. 23
6.1.4.3 Procedures p. 25
6.1.4.4 Impacts on existing entities and interfaces p. 28
6.1.4.5 Evaluation p. 28
6.1.5 Solution #1.5: Mutually Exclusive Access to Network Slices using existing mechanisms p. 28
6.1.5.1 Introduction p. 28
6.1.5.2 Functional description p. 28
6.1.5.3 Procedures p. 31
6.1.5.3.1 General p. 31
6.1.5.3.2 Signalling within the network p. 31
6.1.5.3.3 Interactions with Rel-15 usage of Allowed NSSAI p. 31
6.1.5.3.4 Characteristics of the solution p. 31
6.1.5.4 Impacts on existing entities and interfaces p. 31
6.1.5.5 Evaluation p. 32
6.1.6 Solution #1.6: Enabling access control to network slices that cannot be access simultaneously p. 32
6.1.6.1 Introduction p. 32
6.1.6.1.1 Design Principles p. 32
6.1.6.1.2 Working Assumptions p. 32
6.1.6.1.3 Network Slice Access Exclusion Rules p. 33
6.1.6.2 High-level Description p. 35
6.1.6.3 Impacts on existing services and interfaces p. 37
6.1.6.4 Evaluation p. 38
6.1.7 Solution #1.7: Solutions for MEANS via Slicing Group Indication p. 38
6.1.7.1 Introduction p. 38
6.1.7.2 Functional description p. 38
6.1.7.2.1 UE configuration p. 38
6.1.7.2.2 UE subscription p. 38
6.1.7.2.3 Operations p. 38
6.1.7.2.4 Roaming support p. 39
6.1.7.3 Procedures p. 40
6.1.7.4 Impacts on existing entities and interfaces p. 41
6.1.7.5 Evaluation p. 42
6.1.8 Solution #1.8: Solution to Key issue#1: Access to new group of Network Slices. p. 42
6.2 Solutions for KI#2 p. 43
6.2.1 Solution#2.1: Network slice instance selection in initial AMF p. 43
6.2.1.1 Introduction p. 43
6.2.1.2 Functional description p. 43
6.2.1.3 EPS to 5GS handover Procedures p. 44
6.2.1.4 Impacts on existing entities and interfaces p. 45
6.2.1.5 Evaluation p. 45
6.2.2 Solution #2.2: Slice-aware mobility from EPC to 5GC p. 45
6.2.2.1 Introduction p. 45
6.2.2.2 Functional description p. 45
6.2.2.2.1 Idle Mode Mobility from EPC to 5GC p. 45
6.2.2.2.2 Connected Mode Mobility from EPC to 5GC p. 46
6.2.2.3 Procedures p. 47
6.2.2.4 Impacts on existing entities and interfaces p. 47
6.2.2.5 Evaluation p. 47
6.2.3 Solution #2.3: Inter RAT mobility Slice support p. 47
6.2.3.1 Introduction p. 47
6.2.3.2 Functional description p. 47
6.2.3.3 Procedures p. 49
6.2.3.3.1 Registration with AMF and V-SMF change during CONNECTED state mobility p. 49
6.2.3.3.2 Registration with AMF and V-SMF change during IDLE state mobility p. 50
6.2.3.4 Impacts on existing entities and interfaces p. 50
6.2.3.5 Evaluation p. 51
6.2.4 Solution #2.4: Connected mode mobility from EPC to 5GC p. 51
6.2.4.1 Introduction p. 51
6.2.4.2 Functional description p. 51
6.2.4.3 Procedures p. 52
6.2.4.3.1 Enhancement to PDN connection establishment p. 52
6.2.4.3.2 Enhancement to handover preparation from EPC to 5GC p. 52
6.2.4.4 Impacts on existing entities and interfaces p. 53
6.2.4.5 Evaluation p. 53
6.2.5 Solution#2.5: Using the NF discovery to find the S-NSSAI. p. 53
6.3 Solutions for KI#3 p. 55
6.3.1 Solution #3.1: Slice Specific Authentication and Authorization using non 3GPP credentials based on secondary authentication p. 55
6.3.1.1 Introduction p. 55
6.3.1.2 Functional description p. 56
6.3.1.3 Procedures p. 57
6.3.1.4 Impacts on existing entities and interfaces p. 58
6.3.1.5 Evaluation p. 58
6.3.2 Solution #3.2: Solution to KI#3 on Slice Specific Authentication and Authorization using non 3GPP credentials p. 58
6.3.2.1 Introduction p. 58
6.3.2.2 Functional description p. 59
6.3.2.3 Procedures p. 60
6.3.2.3.1 Secondary Authentication and Authorization During Registration p. 60
6.3.2.3.2 Secondary Re-Authentication and Re-Authorization after Registration p. 63
6.3.2.4 Impacts on existing entities and interfaces p. 63
6.3.2.5 Evaluation p. 63
6.3.3 Solution #3.3: Solution for configuration of network slice authentication p. 64
7 Evaluation p. 64
7.1 Evaluations Criteria for KI#1: Mutually Exclusive Access to Network Slices p. 64
7.2 Evaluations for KI#2: Enabling interworking for slicing between EPC and 5GC p. 66
8 Conclusions p. 67
8.1 Conclusions for key issue #1 - Mutually exclusive access to Network Slices p. 67
8.2 Conclusions for key issue #2 - Enabling interworking for slicing between EPC and 5GC p. 69
8.3 Conclusions for key issue #3 - Access to specific Network Slices authorized and authenticated through additional User Identifiers p. 69
$ Change History p. 70
