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Content for TS 26.506 Word version: 18.3.0

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4 Real-Time media Communication Architecture p. 9

4.1 Overall architecture for Real-Time media Communication (RTC) p. 9

4.1.1 Definition of RTC architecture p. 9

4.1.2 Generalized Media Delivery architecture p. 10

4.1.2.1 Generalized Media Delivery in the 5G System p. 10

4.1.2.2 Reference architecture for Media Delivery p. 12

4.1.2.3 Network Functions and UE entities p. 12

4.1.2.4 Reference points p. 13

4.1.2.5 Interfaces and APIs p. 14

4.1.2.5.1 Interfaces and APIs supporting media session handling p. 14

4.1.2.5.2 Interfaces and APIs supporting media transport p. 14

4.1.2.5.3 Interfaces and APIs supporting application functionality p. 15

4.2 Functions and entities p. 15

4.2.1 General p. 15

4.2.2 Provisioning Function p. 15

4.2.3 Configuration Function p. 15

4.2.4 RTC Media Session Handler (MSH) p. 15

4.2.5 Network Support Function p. 16

4.2.6 ICE Function p. 16

4.2.7 WebRTC Signalling Function p. 16

4.2.8 Interworking Function p. 16

4.2.9 Transport Gateway Function p. 16

4.2.10 Media Function p. 17

4.2.11 Application-supporting Web Function p. 17

4.2.12 RTC Access Function p. 17

4.3 Interfaces p. 17

4.3.1 RTC-1: Provisioning interface p. 17

4.3.2 RTC-3: RTC AS to RTC AF interface p. 18

4.3.3 RTC-4: Media-centric transport interface via RTC AS p. 18

4.3.4 RTC-5: Control transport interface p. 18

4.3.5 RTC-6: Client API p. 19

4.3.6 RTC-7: Client interface p. 19

4.3.7 RTC-8: Application interface p. 19

4.3.7A RTC-10: RTC AS to another RTC AS interface p. 19

4.3.8 RTC-11: RTC Client configuration APIs p. 19

4.3.9 RTC-12: Peer-to-peer media-centric transport interface p. 19

4.4 RTC Architecture extension p. 20

4.4.1 Introduction p. 20

4.4.2 Extended RTC architecture for Edge Computing p. 20

4.4.2.1 General p. 20

4.4.2.2 Edge Application Server (EAS) p. 21

4.4.2.3 Edge Interfaces p. 21

5 Procedures for basic RTC architecture p. 22

5.1 General p. 22

5.2 Common Procedure p. 22

5.2.1 Provisioning p. 22

5.2.2 Configuration p. 23

5.3 Call flow for Over-the-top (OTT) RTC sessions (CS#1) p. 24

5.4 Call flow for Network-supported RTC sessions (CS#2) p. 25

5.5 Call flow for MNO-facilitated RTC sessions (CS#3) p. 28

6 Procedures for Edge Processing p. 32

6.1 Client-driven management of RTC edge processing p. 32

6.2 AF-driven management of RTC edge processing p. 36

A (Normative) Architecture variants for collaboration scenarios p. 38

A.1 General p. 38

A.2 Collaboration scenario 1: p. 38

A.3 Collaboration scenario 2: p. 39

A.4 Collaboration scenario 3: p. 40

A.5 Collaboration scenario 4: p. 40

B (Normative) Architecture variants for RTC Application p. 41

B.1 General p. 41

B.2 RTC Application is a Native WebRTC App p. 41

B.3 RTC architecture for Web App p. 42

$ Change history p. 42