Design and Implementation of Protocol Conversion Server Based on GB/T 28181 and WebRTC

Abstract

Aiming at the problem of interconnection between GB/T 28181-2016 "Technical requirements for information transport, switch and control in video surveillance network system for public security" (GB/T 28181) standard and Web Real-Time Communications (WebRTC) protocol, a protocol conversion server based on GB/T 28181 and WebRTC is designed and implemented. Firstly, based on the improvement of GB/T 28181 protocol stack and WebRTC protocol stack, an audio-video communication protocol stack integrating GB/T 28181 protocol and WebRTC protocol is designed, and the rules of communication between GB/T 28181 protocol and WebRTC protocol are agreed. Secondly, this paper analyzes and summarizes the interoperability of GB/T 28181 protocol and WebRTC protocol in terms of signaling method and interaction process. And on this basis, a proxy conversion server based on the signaling protocol of WebSocket transmission and the session initiation protocol (SIP) protocol of UDP/TCP transmission is designed and completed to realize the conversion function of GB/T 28181 signaling and WebRTC signaling. Finally, the feasibility and correctness of the method are verified through experiments, and the interoperability problem between GB/T 28181 protocol and WebRTC protocol is effectively solved.