TR 29.831
Study on NRF API enhancements to avoid Signalling and Storing of Redundant Data
V18.0.0 (Wzip)
2023/09 40 p.
- Rapporteur:
- Mr. Wiehe, Ulrich
Nokia Shanghai Bell
full Table of Contents for TR 29.831 Word version: 18.0.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
4 Baseline
5 Key Issues
6 Solutions
7 Evaluations
8 Conclusions
$ Change history
1 Scope p. 6
The present document identifies deficiencies of the NRF APIs as specified in TS 29.510 and studies potential optimization solutions. The document will focus on the following aspects:
- avoid data storage overhead in the NRF due to many NFs (especially NFs from the same NF set) registering with identical information,
- avoid signalling overhead (both in terms of payload size and number of HTTP requests) due to discovery responses containing lots of duplicate information and due to the number of data change notification sent when duplicated data are changed one by one.
- avoid processing overhead (both at NRF and its consumers) resulting e.g. from signalling overhead.
2 References p. 6
3 Definitions of terms, symbols and abbreviations p. 6
4 Baseline p. 7
4.1 General p. 7
4.2 Data Storage Overhead p. 7
4.3 Signalling Overhead p. 7
4.4 Processing Overhead p. 7
5 Key Issues p. 8
5.1 Key Issue #1: Avoid Duplicate Configuration, Storage and Transmission of Shareable Data p. 8
5.2 Key Issue #2: Signaling overhead of NF discovery responses between PLMNs p. 9
6 Solutions p. 9
6.1 Solution#1: Avoid Duplicate Configuration and Transmission of Shareable Data p. 9
6.1.1 Description p. 9
6.1.2 Impacts on services, entities and interfaces p. 11
6.1.3 Pros p. 11
6.1.4 Cons p. 11
6.2 Solution#2: Support of NF (Service) Set Profiles p. 11
6.2.1 Description p. 11
6.2.1.1 General p. 11
6.2.1.2 NFManagement API Resources p. 12
6.2.1.3 NF-Instance Registration p. 13
6.2.1.4 NF Discovery p. 15
6.2.1.4.1 Alternative 1 p. 15
6.2.1.4.2 Alternative 2 p. 16
6.2.1.5 NF Set profile subscription p. 18
6.2.1.6 NF Set profile modification / deletion p. 19
6.2.2 Impacts on services, entities and interfaces p. 20
6.3 Solution #3: Download Large Volume Data from NRF p. 20
6.3.1 Description p. 20
6.3.2 Impacts on services, entities and interfaces p. 21
6.3.3 Pros p. 21
6.3.4 Cons p. 21
6.4 Solution #4: Enhancement of inter NRF interaction to optimize shareable data transmission p. 21
6.4.1 Description p. 21
6.4.2 Impacts on services, entities and interfaces p. 22
6.4.3 Pros p. 23
6.4.4 Cons p. 23
6.5 Solution #5: Optimization of shareable data transmission for NF set level shared data p. 23
6.5.1 Description p. 23
6.5.2 Impacts on services, entities and interfaces p. 24
6.5.3 Pros p. 24
6.5.4 Cons p. 24
6.6 Solution #6: NRF Policy Control on Information Exposure for different PLMNs p. 24
6.6.1 Description p. 24
6.6.2 Impacts on services, entities and interfaces p. 25
6.6.3 Pros p. 26
6.6.4 Cons p. 26
6.7 Solution#7: List of Shareable Profile Items p. 26
6.7.1 Description p. 26
6.7.2 Impacts on services, entities and interfaces p. 27
6.7.3 Pros p. 27
6.7.4 Cons p. 27
6.8 Solution #8: Single Subscription of NF Profile Change from an NF Set p. 27
6.8.1 Description p. 27
6.8.2 Impacts on services, entities and interfaces p. 28
6.8.3 Pros p. 28
6.8.4 Cons p. 28
6.9 Solution #9: Single NF Profile Change Notification to an NF Set p. 28
6.9.1 Description p. 28
6.9.2 Impacts on services, entities and interfaces p. 29
6.9.3 Pros p. 29
6.9.4 Cons p. 29
6.10 Solution #10: Simplifying the NF service discovery response of inter-PLMN p. 29
6.10.1 Description p. 29
6.10.2 Impacts on services, entities and interfaces p. 30
6.10.3 Pros p. 31
6.10.4 Cons p. 31
6.11 Solution 11: Avoid large configuration of UE Routing Indicator p. 31
6.11.1 Description p. 31
6.11.2 Impacts on services, entities and interfaces p. 31
6.11.3 Pros p. 31
6.11.4 Cons p. 31
6.12 Solution #12: Support for NF Set level shared data p. 32
6.12.1 Description p. 32
6.12.2 Impacts on services, entities and interfaces p. 34
6.12.3 Pros p. 34
6.12.4 Cons p. 34
7 Evaluations p. 34
7.1 Evaluation of Solutions for Key Issue#1 p. 34
7.1.1 Synchronization of Shareable Data p. 34
7.1.1.1 Configured Shareable Data p. 34
7.1.1.2 Discovered Shareable Data p. 35
7.1.1.3 Change of Shareable Data p. 35
7.1.2 Storage requirements p. 35
7.1.3 Discovery procedure p. 36
7.1.4 Which data should be shareable? p. 36
7.1.5 New NF services operations p. 36
7.1.6 Applicability Scope p. 36
7.1.7 Backward compatibility p. 37
7.1.8 Comparison p. 37
7.2 Evaluation of Solutions for Key Issue#2 p. 38
8 Conclusions p. 39
$ Change history p. 40
