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Content for TR 29.821 Word version: 17.0.0

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4 Architectural Requirements and Assumptions p. 9

4.1 Architectural Requirements p. 9

4.2 Architectural Assumptions p. 9

5 Key Issues p. 10

5.1 Key Issue #1: Restoration of profile with AMF, SMF, SMSF and AUSF p. 10

5.2 Key Issue #2: Restoration of profile with PCF p. 10

5.3 Key Issue #3: Restoration of profile with NEF p. 10

5.4 Key Issue #4: Granularity of Data p. 11

5.5 Key Issue #5: Handling Nudm_UECM without Authentication Status p. 11

5.6 Key Issue #6: Notification Path p. 11

6 Solutions p. 11

6.1 Solution#1: Restoration for AMF p. 11

6.1.1 Description p. 11

6.1.2 Procedures p. 12

6.1.3 Impacts on services, entities and interfaces p. 13

6.2 Solution #2: Restoration for AMF and SMF with event exposure p. 13

6.2.1 Description p. 13

6.2.2 Procedures p. 13

6.2.3 Impacts on services, entities and interfaces p. 14

6.3 Solution #3: Restoration for AMF and SMSF with event exposure p. 14

6.3.1 Description p. 14

6.3.2 Procedures p. 14

6.3.3 Impacts on services, entities and interfaces p. 15

6.4 Solution #4: Restoration for AMF and SMSF without event exposure p. 15

6.4.1 Description p. 15

6.4.2 Procedures p. 15

6.4.3 Impacts on services, entities and interfaces p. 16

6.5 Solution#5: <S#5> Propagate the change of the UDR NF status using direct signalling between UDM and NFs p. 16

6.5.1 Introduction p. 16

6.5.2 Functional Description p. 16

6.5.3 Procedures p. 17

6.5.4 Impacts on services, entities and interfaces p. 18

6.6 Solution#6: <S#6> Propagate the change of the UDR NF status via NRF and UDM p. 18

6.6.1 Introduction p. 18

6.6.2 Functional Description p. 19

6.6.3 Procedures p. 20

6.6.4 Impacts on services, entities and interfaces p. 21

6.7 Solution#7: Unified solution p. 21

6.7.1 Introduction p. 21

6.7.2 Functional Description p. 22

6.7.3 Procedures p. 24

6.7.4 Impacts on services, entities and interfaces p. 25

6.8 Solution#8: Reset-IDs p. 25

6.8.1 Description p. 25

6.8.2 Procedures p. 26

6.8.3 Impacts on services, entities and interfaces p. 26

6.9 Solution#9: Unified solution with Reset-ID or SUPI ranges p. 26

6.9.1 Introduction p. 26

6.9.2 Functional Description p. 26

6.9.3 Procedures p. 27

6.9.4 Impacts on services, entities and interfaces p. 28

6.10 Solution#10: Prevent overwriting of latest UECM Data p. 28

6.10.1 Description p. 28

6.10.2 Procedures p. 28

6.10.3 Impacts on services, entities and interfaces p. 29

6.11 Solution#11: Handling Nudm_UECM without Authentication Status p. 29

6.11.1 Description p. 29

6.11.2 Procedures p. 29

6.11.3 Impacts on services, entities and interfaces p. 29

6.12 Solution#12: Recovery of AUSF Instance holding latest KAUSF p. 30

6.12.1 Description p. 30

6.12.2 Procedures p. 30

6.12.3 Impacts on services, entities and interfaces p. 30

6.13 Solution#13: Unified solution with Implicit Subscription p. 30

6.13.1 Introduction p. 30

6.13.2 Functional Description p. 31

6.13.3 Procedures p. 31

6.13.4 Impacts on services, entities and interfaces p. 32

6.14 Solution#14: Deferred Nudm_UECM due to lack of authentication status p. 32

6.14.1 Description p. 32

6.14.2 Procedures p. 32

6.14.3 Impacts on services, entities and interfaces p. 32

6.15 Solution#15: Notification via existing NRF services p. 32

6.15.1 Introduction p. 32

6.15.2 Functional Description p. 32

6.15.3 Procedures p. 33

6.16 Solution#16: Notification via UDR consumer and existing NRF services p. 33

6.16.1 Introduction p. 33

6.16.2 Functional Description p. 33

6.16.3 Procedures p. 34

6.17 Solution#17: Notification via a new NRF service p. 34

6.17.1 Introduction p. 34

6.17.2 Functional Description p. 34

6.17.3 Procedures p. 35

6.18 Solution#18: Notification via a new DataRestoration Network Function (DRNF) p. 35

6.18.1 Introduction p. 35

6.18.2 Functional Description p. 35

6.18.3 Procedures p. 36

6.19 Solution#19: Notification via UDM to Default Notification URIs p. 36

6.19.1 Introduction p. 36

6.19.2 Functional Description p. 36

6.19.3 Procedures p. 37

6.19.4 Impacts on services, entities and interfaces p. 41

6.20 Solution#20: Notification via Reset Control Function (RCF) p. 42

6.20.1 Introduction p. 42

6.20.2 Functional Description p. 42

6.20.3 Procedures p. 43

6.20.4 Impacts on services, entities and interfaces p. 44

6.21 Solution#21: Notification via Reset Control Function (RCF) without explicit subscription from end-consumer NF p. 44

6.21.1 Introduction p. 44

6.21.2 Functional Description p. 44

6.21.3 Procedures p. 45

6.21.4 Impacts on services, entities and interfaces p. 46

6.22 Solution#22: DNN/S-NSSAI as new granularity p. 46

6.22.1 Introduction p. 46

6.22.2 Functional Description p. 47

6.22.3 Impacts on services, entities and interfaces p. 47

7 Evaluations p. 47

7.1 Evaluation of Solutions for Key Issues#1, 2, 3, 4, 5, 6 p. 47

7.1.1 Overview of the evaluation p. 47

7.1.2 Preparation of profile in NF p. 50

7.1.3 Notification path from UDR to NF (Evaluation of Solutions for Key Issue#6) p. 50

7.1.4 Notification content p. 51

7.1.5 Synchronization trigger p. 52

7.1.6 Synchronization procedure p. 52

7.1.7 Other p. 52

8 Conclusions p. 53

8.1 Conclusion of Solutions for Key Issues#1, 2, 3, 4, 5 p. 53

$ Change history p. 54