Content for TR 23.701 Word version: 12.0.0
5 Solutions
5.1 Solution 1
5.2 Solution 2
5.3 Solution 3
5.4 Solution 4
5.5 Solution 5
5.6 Solution 6
5.7 Solution 7
6 Evaluation
7 Conclusions
A WebRTC access to IMS - network-based architecture
A.1 Overview
A.2 Procedures
$ Change History
5 Solutions p. 10
5.1 Solution 1 p. 11
5.1.1 Overview p. 11
5.1.2 Description of the solution - Procedures p. 11
5.1.2.0 General Assumptions p. 11
5.1.2.1 Registration p. 12
5.1.2.2 Session handing p. 14
5.1.2.2.0 Assumptions p. 14
5.1.2.2.1 Handling of outgoing sessions p. 14
5.1.2.2.2 Handling of incoming sessions p. 15
5.1.2.3 Extended role of the P-CSCF to handle interoperability between a WebRTC client and an existing 3GPP UE p. 15
5.1.3 Impact on existing entities and interfaces p. 16
5.1.4 Solution evaluation p. 16
5.2 Solution 2 p. 16
5.2.1 Overview p. 16
5.2.2 Description of the solution - Procedures p. 16
5.2.2.1 Functions of the WebRTC Signalling Function p. 16
5.2.2.2 Functions of the WebRTC Media Function p. 18
5.2.2.3 Functions of the PCC framework p. 18
5.2.2.4 IMS registration and authentication p. 19
5.2.2.4.0 General p. 19
5.2.2.4.1 Registration: WebRTC client uses SIP over WebSockets p. 19
5.2.2.4.2 Registration: WebRTC client uses Web Authentication p. 22
5.2.2.5 Origination and termination p. 22
5.2.3 Impact on existing entities and interfaces p. 23
5.2.4 Solution evaluation p. 23
5.3 Solution 3 p. 23
5.3.1 Overview p. 23
5.3.1.1 Assumptions p. 23
5.3.1.2 Requirements p. 23
5.3.1.2.0 Introduction p. 23
5.3.1.2.1 Supported access networks p. 23
5.3.1.2.2 Media processing p. 24
5.3.1.2.3 QoS p. 24
5.3.1.2.4 User identity and authentication p. 24
5.3.1.2.5 Service architecture p. 24
5.3.1.2.6 Subscriber data management p. 24
5.3.1.3 Signalling architecture p. 24
5.3.1.4 Functional entities p. 25
5.3.1.4.1 WIC (WebRTC IMS Client) p. 25
5.3.1.4.2 WWSF (WebRTC Web Server Function) p. 25
5.3.1.4.3 WAAF (WebRTC Access Aggregator Function) p. 26
5.3.1.4.4 P-CSCF p. 26
5.3.1.4.5 AGW (Access GateWay) p. 26
5.3.1.5 Reference points p. 27
5.3.1.5.1 W1a (UE to WAAF) p. 27
5.3.1.5.2 W1b (UE to WWSF) p. 27
5.3.1.5.3 W2 (WWSF to WAAF) p. 27
5.3.1.5.4 Gm (WAAF to P-CSCF) p. 27
5.3.1.5.5 Iq+ (P-CSCF to AGW) p. 27
5.3.1.5.6 W3 (UE to AGW) p. 27
5.3.1.6 Media plane protocol architecture p. 27
5.3.2 Description of the solution - Procedures p. 29
5.3.2.1 Registration p. 29
5.3.2.1.1 Introduction p. 29
5.3.2.1.2 WIC registration of individual IMPU with IMS using IMS digest p. 30
5.3.2.1.3 WIC registration of individual IMPU with IMS based on web authentication p. 30
5.3.2.1.4 WAAF registration of wildcard IMPU with IMS on behalf of WWSF p. 31
5.3.2.1.5 WIC registration of individual IMPU from wildcard IMPU range p. 32
5.3.2.2 Origination and termination p. 33
5.3.3 Impact on existing entities and interfaces p. 33
5.3.4 Solution evaluation p. 33
5.4 Solution 4 p. 34
5.4.1 Overview p. 34
5.4.1.1 Reference architecture model p. 34
5.4.1.2 Reference points p. 34
5.4.1.3 Functional entities p. 35
5.4.2 Description of the solution - Procedures p. 35
5.4.3 Impact on existing entities and interfaces p. 36
5.4.4 Solution evaluation p. 36
5.5 Solution 5 p. 36
5.5.1 Overview p. 36
5.5.1.1 Reference architecture model p. 36
5.5.1.2 Reference points p. 36
5.5.1.3 Functional entities p. 37
5.5.2 Description of the solution - Procedures p. 38
5.5.2.0 General p. 38
5.5.2.1 Registration p. 38
5.5.3 Impact on existing entities and interfaces p. 43
5.5.4 Solution evaluation p. 43
5.6 Solution 6 p. 43
5.6.1 Overview p. 43
5.6.2 Description of the solution - Procedures p. 44
5.6.3 Impact on existing entities and interfaces p. 44
5.6.4 Solution evaluation p. 44
5.7 Solution 7 p. 44
5.7.1 Overview p. 44
5.7.1.1 Assumptions p. 44
5.7.1.2 High level architecture p. 45
5.7.2 Description of the solution - Procedures p. 46
5.7.2.0 General p. 46
5.7.2.1 ICE procedure and candidate list buildup p. 47
5.7.2.2 WebRTC call flow p. 48
5.7.2.3 Media Interworking Function - Transcoding free operation p. 50
5.7.3 Impact on existing entities and interfaces p. 50
5.7.4 Solution evaluation p. 50
6 Evaluation p. 50
7 Conclusions p. 50
A WebRTC access to IMS - network-based architecture p. 51
A.1 Overview p. 51
A.1.1 Assumptions p. 51
A.1.2 Signalling architecture p. 51
A.1.3 Functional entities p. 52
A.1.3.1 WIC (WebRTC IMS Client) p. 52
A.1.3.2 WWSF (WebRTC Web Server Function) p. 52
A.1.3.3 eP-CSCF (P-CSCF enhanced for WebRTC) p. 53
A.1.3.4 eIMS-AGW (IMS Access GateWay enhanced for WebRTC) p. 53
A.1.4 Reference points p. 54
A.1.4.1 W1 (UE to WWSF) p. 54
A.1.4.2 W2 (UE to eP-CSCF) p. 54
A.1.4.3 Iq (eP-CSCF to eIMS-AGW) p. 54
A.1.4.4 W3 (UE to eIMS-AGW) p. 54
A.1.5 Media plane protocol architecture p. 54
A.2 Procedures p. 56
$ Change History p. 59
