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Content for  TR 32.899  Word version:  15.1.0

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2  Referencesp. 10

3  Definitions, symbols and abbreviationsp. 11

4  High-level description and potential requirementsp. 12

5  Topicsp. 17

5.1  Session management and service continuityp. 17

5.1.1  Description and assumptionsp. 17

5.1.2  Potential requirementsp. 17

5.1.3  Key issuesp. 17

5.1.4  Solutionsp. 18

5.1.4.1  Solution#1.1: PDU session charging from SMFp. 18

5.1.4.2  Solution#1.2: PDU session charging SSC Mode 1 from SMFp. 21

5.1.4.3  Solution#1.3: PDU session Charging SSC Mode 2 from SMF - CH session updatep. 23

5.1.4.4  Solution#1.4: PDU session Charging SSC Mode 2 from SMF - new CH sessionp. 25

5.1.4.5  Solution#1.5: PDU session Charging SSC Mode 3 from SMF - CH session updatep. 26

5.1.4.6  Solution#1.6: PDU session Charging SSC Mode 3 from SMF - New CH sessionp. 28

5.1.4.7  Solution#1.7: PDU session Charging SSC Mode 3 Multi Homed from SMF - CH session updatep. 30

5.1.4.8  Solution#1.8: PDU session Charging SSC Mode 3 Multi Homed from SMF - New CH sessionp. 32

5.1.5  Evaluation and conclusionp. 32

5.2  QoSp. 34

5.3  Interaction between SMF and UPFp. 37

5.3.1  Description and assumptionsp. 37

5.3.2  Potential requirementsp. 38

5.3.3  Key issuesp. 39

5.3.4  Solutionsp. 40

5.3.4.1  Solution#3.1: The reporting and quota management in the separation SMF and UPFp. 40

5.3.4.2  Solution#3.2: PDU session charging - counts in BP/UL CL UPF onlyp. 43

5.3.4.3  Solution#3.3: PDU session charging - counts in two UPFs - single CH sessionp. 49

5.3.4.4  Solution#3.4: The reporting and quota management SSC mode 2 - CH session updatep. 51

5.3.4.5  Solution#3.5: The reporting and quota management - in multiple UPFs (parallel traffic)p. 53

5.3.4.6  Solution#3.6: Bytes counted as continuous timep. 58

5.3.4.7Void

5.3.4.8  Solution#3.8: Charging at SMF and usage monitoring over N4p. 58

5.3.4.9  Solution#3.9: PDU session charging - counts in UPFs - single CH sessionp. 60

5.3.4.10  Solution#3.10: The reporting and quota management SSC mode 2 - New CH sessionp. 65

5.3.5  Overall evaluation and conclusionp. 66

5.4  Network Slicingp. 67

5.4.1  Description and assumptionsp. 67

5.4.2  Potential requirementsp. 68

5.4.3  Key issuesp. 68

5.4.4  Solutionsp. 69

5.4.5  Conclusionsp. 75

5.5  Network Capability Exposurep. 75

5.6  Roamingp. 80

5.6.1  Description and assumptionp. 80

5.6.2  Potential requirementsp. 80

5.6.3  Key issuesp. 80

5.6.4  Solutionsp. 81

5.6.4.1  Solution #6.1: PDU session charging from SMF in roaming LBO - CH in VPLMNp. 81

5.6.4.2  Solution #6.2: PDU session charging from SMF in roaming LBO - CH in HPLMNp. 82

5.6.4.3  Solution #6.3: PDU session charging from SMFs in Home Routedp. 84

5.6.4.4  Solution #6.4: PDU session charging from SMF in roaming LBO - CH in HPLMN and VPLMNp. 88

5.6.5  Overall evaluation and conclusionp. 89

5.7  Service-based architecturep. 90

5.8  Interworking between 5G System and existing systemsp. 93

5.9  Online and offline charging evaluationp. 97

5.10  Connection, registration and mobility managementp. 102

6  Conclusions and recommendationsp. 103

$  Change Historyp. 104


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