Research And Application Of WebRTC Signaling Based On SIP Protocol

In recent years,with the rapid develepment of mobile network and intelligent mobile PDA and the improvement of users' demand for voice and video calls,WebRTC technology has been widely applied to multimedia communication,and has a profound impact on the field of multimedia communications.However,the JSEP provided by WebRTC is a weak signaling protocol that can only perform simple media negotiation.In the application of fusion communication for enterprise,WebRTC must be combined with the actual signaling protocol to meet the user's demand for high quality mobile communication.SIP protocol is the core technology of IMS network.It plays a great role in the establishment,interruption and termination of multimedia conversation.After long term development,SIP protocol has been quite mature.Therefore,we chose the SIP protocol without hesitation as the actual signaling protocol combined with WebRTC.In order to help browsers to develop WebRTC Web API quickly in their browser,WebRTC open source technology delineated WebRTC PeerConnection API.This paper proposes an integration sheme of the WebRTC PeerConnection layer and SIP protocol based on the client,this paper aims to implement multiple platforms(Android,iOS,Windows)application system based on the scheme,and the application has the functions of contact list,instant messaging,file transfer,audio and video calls and others.This paper firstly introduces the background and significance of this subject,and then describes the WebRTC and related technology,the sheme proposed by us,SIP protocol,LDAP protocol and MQTT protocol,and then designs the architecture and module of the application system based on the integration sheme of WebRTC PeerConnection layer and SIP protocol based on the client,and then briefly introduces contact list module,instant messaging module and file transfer module,and then focuses on the audio and video communication module,and then tests the client application.Finally this paper use the experimental results to validate the feasible scheme.