Content for TR 23.700-63 Word version: 19.0.0
5 Key Issues p. 8
5.1 Key Issue #1: Selection of UPF providing a selected user plane functionality p. 8
5.1.1 Description p. 8
5.2 Key Issue #2: Enhancements on UPF information exposure p. 9
5.2.1 Description p. 9
5.3 Key Issue #3: Study enhancements for UPF handling of headers p. 9
5.3.1 Description p. 9
6 Solutions p. 10
6.0 Mapping of Solutions to Key Issues p. 10
6.1 Solution #1: Provisioning of information for header handling p. 10
6.1.1 Description p. 10
6.1.2 Procedures p. 11
6.1.3 Impacts on services, entities and interfaces p. 16
6.2 Solution #2: UPF provision and selection based on new UPF functionality p. 16
6.2.1 Key Issue mapping p. 16
6.2.2 Description p. 16
6.2.3 Procedures p. 17
6.2.4 Impacts on services, entities and interfaces p. 17
6.3 Solution #3: Selection on UPF with extended user plane capabilities p. 18
6.3.1 Description p. 18
6.3.2 Procedures p. 18
6.3.3 Impacts on existing nodes and functionality p. 21
6.4 Solution #4: Selection of UPF providing specific user plane functionalities p. 21
6.4.1 Key Issue mapping p. 21
6.4.2 Description p. 21
6.4.3 Procedures p. 23
6.4.4 Impacts on services, entities and interfaces p. 24
6.5 Solution #5: Direct subscription of UPF event exposure service for TSC management p. 24
6.5.1 Description p. 24
6.5.2 Procedures p. 25
6.5.3 Impacts on services, entities and interfaces p. 25
6.6 Solution #6: UPF selection based on the status of the supported functionalities p. 25
6.6.1 Key Issue mapping p. 25
6.6.2 Description p. 26
6.6.3 Procedures p. 26
6.6.4 Impacts on services, entities and interfaces p. 27
6.7 Solution #7: Translating SUPI/GPSI to NATed IP address p. 27
6.7.1 Description p. 27
6.7.2 Procedures p. 28
6.7.2.1 Procedure p. 28
6.7.2.2 Service definition p. 29
6.7.3 Impacts on services, entities and interfaces p. 29
6.8 Solution #8: UPF event exposure during UPF relocation p. 29
6.8.1 Key Issue mapping p. 29
6.8.2 Description p. 30
6.8.3 Procedures p. 30
6.8.4 Impacts to Services, Entities and Interfaces p. 31
6.9 Solution #9: DNAI Mapping information exposure p. 31
6.9.1 Description p. 31
6.9.2 Procedures p. 32
6.9.3 Impacts on services, entities and interfaces p. 32
6.10 Solution #10: Subscription to UPF Event Exposure Services in the event of UP Path change p. 33
6.10.1 Key Issue mapping p. 33
6.10.2 Description p. 33
6.10.3 Procedures p. 34
6.10.4 Impacts on services, entities and interfaces p. 35
6.11 Solution #11: Direct subscription of UPF event from NEF/trusted AF or NWDAF p. 35
6.11.1 Description p. 35
6.11.2 Procedures p. 36
6.11.2.1 Direct subscription of UPF Event Exposure service from NEF/trusted AF p. 36
6.11.2.2 Direct subscription of UPF Event Exposure service from NWDAF p. 37
6.11.3 Impacts on services, entities and interfaces p. 37
6.12 Solution #12: Direct subscription to UPF Event Exposure service via N6 p. 38
6.12.1 Key Issue mapping p. 38
6.12.2 Description p. 38
6.12.2.1 General p. 38
6.12.2.2 Solution Description p. 38
6.12.3 Procedures p. 40
6.12.4 Impacts on services, entities and interfaces p. 43
6.13 Solution #13: UPF Discovery and Direct Subscription to UPF for AF p. 43
6.13.1 Description p. 43
6.13.2 Procedures p. 44
6.13.2.1 General call flow p. 44
6.13.2.2 UPF discovery by utilizing Header information and Subscription via CP p. 45
6.13.2.3 UPF Discovery and subscription by utilizing Header information p. 45
6.13.3 Impacts on services, entities and interfaces p. 47
7 Overall Evaluation p. 47
8 Conclusions p. 47
8.1 Conclusions for Key Issue #1: Selection of UPF providing a selected user plane functionality p. 47
8.2 Conclusions for Key Issue #2: Enhancements on UPF information exposure p. 48
8.3 Conclusions for Key Issue #3: Enhancement of UPF handling of headers p. 48
$ Change history p. 50
