Tech-invite 3GPPspace IETFspace

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Content for TR 28.816 Word version: 17.0.0

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4 Concepts and background p. 8

4.1 General p. 8

4.2 5G data connectivity domain charging p. 9

4.3 CP data transfer charging p. 9

4.3.1 General p. 9

4.3.2 CP data transfer charging with SCEF p. 9

4.3.3 CP data transfer charging with NEF p. 10

4.4 Monitoring event charging p. 10

4.4.1 General p. 10

4.4.2 Monitoring event charging with SCEF p. 11

4.4.3 Monitoring event charging with NEF p. 11

5 Use cases and key issues p. 12

5.1 Use cases p. 12

5.1.1 Use case #1: Control plane optimization in 5G data connectivity domain charging p. 12

5.1.2 Use case #2: Non-IP Data Delivery (NIDD) in control plane data transfer domain charging p. 13

5.1.3 Use case #3: Support of Serving PLMN Rate Control in control plane data transfer domain charging p. 13

5.1.4 Use case #4: Support of Small Data Rate Control in control plane data transfer domain charging p. 13

5.1.5 Use case #5: Handover 5GS CIoT charging with EPS interworking p. 14

5.1.6 Use case #6: Support for monitoring events charging p. 14

5.1.7 Use case #7: The access service of 5GS CIoT p. 15

5.1.8 Use case #8: Charging support in home-routed roaming scenario p. 15

5.1.9 Use case #9: Support of rate control of user data p. 15

5.2 Potential charging requirements p. 15

5.3 Mapping of use cases p. 16

5.4 Charging scenarios and key issues p. 16

5.4.1 5G data connectivity domain charging p. 16

5.4.1.1 Key issues for 5GS CIoT charging in 5G data connectivity domain charging p. 16

5.4.1.2 Potential solutions p. 17

5.4.1.2.0 General p. 17

5.4.1.2.1 Charging enhancements of PDU session charging p. 17

5.4.1.2.2 Solution of charging enhancement for 5GS CIoT access service p. 18

5.4.1.2.2.1 Solution for SMF to interact with CHF for 5GS CIoT access service p. 18

5.4.1.2.3 PDU session charging for Home-routed roaming scenario p. 18

5.4.1.2.4 PDU session charging in case of EPS interworking p. 19

5.4.1.3 Evaluation p. 20

5.4.2 Control Plane data transfer domain charging p. 20

5.4.2.1 Key issues of 5GS CIoT charging in control plane data transfer domain charging p. 20

5.4.2.2 Potential solutions p. 20

5.4.2.2.0 General p. 20

5.4.2.2.1 Charging enhancement for NEF based NIDD p. 21

5.4.2.2.1.1 Charging architecture in control plane data transfer domain charging for 5GS CIoT p. 21

5.4.2.2.1.2 Message flow for SMF to interact with CHF in case of NEF based NIDD p. 21

5.4.2.2.2 Charging enhancement to north bound API charging for NEF based NIDD p. 22

5.4.2.2.2.3 Flow for north bound API charging in case of NEF based NIDD p. 23

5.4.2.3 Evaluation p. 24

5.4.3 Monitoring event domain charging p. 25

5.4.3.0 General p. 25

5.4.3.1 Potential solutions p. 25

5.4.3.1.1 Charging architecture in Monitoring event domain charging for 5GS CIoT p. 25

5.4.3.1.2 Message flow for monitoring event charging for NEF p. 25

5.4.3.2 Evaluation p. 27

6 Conclusion and recommdnations p. 27

$ Change history p. 29