Content for TR 23.700-18 Word version: 18.0.0
5 Key Issues
6 Solutions
7 Overall Evaluation
8 Conclusions
A Pre-Rel-18 Traffic Steering Control
$ Change history
5 Key Issues p. 9
5.1 Key Issue #1: Traffic Steering Policy and SFC Enhancements p. 9
5.1.1 Description p. 9
5.2 Key Issue #2: Exposure to enable AF to request predefined SFC for traffic flow(s) related with target UE(s) p. 9
5.2.1 Description p. 9
6 Solutions p. 10
6.0 Mapping of Solutions to Key Issues p. 10
6.1 Solution #1: Re-use of existing TSP for N6-LAN p. 10
6.1.1 Description p. 10
6.1.2 Procedures p. 14
6.1.3 Impacts on existing nodes and functionality p. 14
6.2 Solution #2: AF influence with explicit traffic steering policies per flow p. 15
6.2.1 Description p. 15
6.2.2 Procedures p. 15
6.2.3 Impacts on existing nodes and functionality p. 16
6.3 Solution #3: AF influencing Service Function Chaining support by 5GC p. 17
6.3.1 Description p. 17
6.3.2 Procedures p. 18
6.3.2.0 Introduction p. 18
6.3.2.1 Procedure to associate SFC with certain traffic and UE(s) p. 19
6.3.2.2 Procedure to associate SFC with an individual UE p. 20
6.3.2.3 Discovery of available SFCs p. 21
6.3.2.4 Selection of an UPF that supports the proper SFC/SFP p. 21
6.3.3 Impacts on existing nodes and functionality p. 22
6.4 Solution #4: SFC support in 5GS p. 22
6.4.1 Description p. 22
6.4.2 Procedures p. 25
6.4.3 Impacts on existing nodes and functionality p. 27
6.5 Solution #5: UPF enhancement with SFC capability p. 28
6.5.1 Description p. 28
6.5.2 Procedures p. 30
6.5.2.1 N6-LAN traffic steering with SFC capabilities p. 31
6.5.2.2 AF influenced traffic steering with SFC capabilities p. 31
6.5.3 Impacts on existing nodes and functionality p. 32
6.6 Solution #6: Service Function Chaining Configuration p. 33
6.6.1 Description p. 33
6.6.2 Procedures p. 33
6.6.3 Impacts on existing nodes and functionality p. 34
6.7 Solution #7: Enhancing Application Function influence on traffic routing to an N6-LAN based on pre-defined SFC policies p. 34
6.7.1 Description p. 34
6.7.2 Procedures p. 35
6.7.2.1 AF requesting SFC policies in a 3GPP network p. 35
6.7.2.2 AF influence on traffic routing by including pre-defined SFC policies p. 37
6.7.3 Impacts on services, entities and interfaces p. 38
6.8 Solution #8: AF request predefined SFC for traffic flow(s) related with target UE(s) p. 38
7 Overall Evaluation p. 43
8 Conclusions p. 43
A Pre-Rel-18 Traffic Steering Control p. 45
$ Change history p. 48
