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TR 23.701 (SA2)
Study on Web Real Time Communication (WebRTC) access to IMS

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V12.0.0 (Wzip)  2013/12  59 p.

Rapporteur:  Dr. Yu, Qing
See also:  WebRTC-related TS/TR

The present document contains a study on the potential modifications of the IMS architecture and stage 2 procedures as required by the support of Web Real Time Communication (WebRTC) clients access to IMS.

For this purpose the present document addresses (non exhaustive list):
  • Architectural impacts for the support of different kinds of clients (operator / Third party) in different scenarios.
  • The architecture (including the support of WebRTC clients access to IMS for clients on a 3GPP UE that are roaming at access level) for following scenarios:
    • when 3GPP or non-3GPP access is used (common IMS).
    • when the UE is not roaming at access level or when home-routed access is used (these scenarios have priority for the work).
    • evaluate/study whether IMS roaming architecture is used in case of 3GPP LBO.
  • Media plane aspects e.g.:
    • architectural impacts related to the use of specific codecs: the study addresses transcoding aspects but also the case where the use of 3GPP codecs is possible from the UE.
    • architectural impacts related to media plane security interworking.
  • Authentication and Control plane security related aspects.
  • Charging.
  • PCC aspects.
  • Usage of the 3GPP Packet Core Network to support WebRTC clients access to IMS.
For example the following points had been studied: the PDN connection / PDP context to be used by WebRTC traffic especially in roaming cases and the QoS control, e.g. how a WebRTC client can use the QoS supported / delivered by the 3GPP Packet Core.


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1  ScopeWord-p. 7
2  References
3  AbbreviationsWord-p. 8
4  Assumptions and architectural requirementsWord-p. 9
5  Solutions
5.1  Solution 1Word-p. 11
5.2  Solution 2
5.3  Solution 3
5.3.1  Overview
5.3.2  Description of the solution - Procedures
5.3.3  Impact on existing entities and interfaces
5.3.4  Solution evaluation

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