Research On Audio And Video Network Transmission Strategy Based On QUIC Protocol

With the rapid popularization and enhancement of mobile Internet and 5G communication technology,and the rapid emergence of new applications such as HD video,VR/AR,telemedicine,and smart driving,real-time audio and video transmission technology has become one of the important basic and core technologies of the Internet.As a new UDP-based network transmission protocol with lower latency,higher transmission rate,better reliability and easy scalability of user state,QUIC protocol has been widely studied and paid attention by academia and industry.The purpose of this paper is to explore the application and optimization of QUIC protocol in audio and video transmission through in-depth understanding and detailed analysis of the protocol,and to propose corresponding transmission strategies and routing algorithms.The QUIC protocol has a low hit rate of Server Config,which affects the handshake efficiency and leads to slow loading of audio and video pages.To address this problem,this paper proposes a shared Server Config Redis caching server and a corresponding Server Config caching and fetching strategy.With this policy,all servers can fetch Server Config from the Redis cache,avoiding performance consumption problems such as the need for separate fetching and caching.Experimental results show that this strategy can effectively improve the hit rate of Server Config and accelerate the handshake speed and audio/video page loading speed.Second,the application of multi-path transmission technology in audio and video transmission in mobile scenarios is explored.For the characteristics of mobile networks,this paper uses the multi-path transmission feature of QUIC protocol to transmit data by using multiple paths of WIFI and mobile networks simultaneously,and compares the differences in transmission performance between client-side multi-path QUIC and single-path QUIC.In addition,the effect of a shared Server Config cache server on the multipath QUIC transmission performance is also investigated.The experimental results show that multipath QUIC can significantly improve bandwidth utilization,and the use of a shared Server Config cache server can further improve the transmission performance of multipath QUIC,especially in the case of better network quality,which can obtain higher bandwidth utilization.Finally,this paper proposes an SDN-based segmented routing QUIC transmission framework(SDNQS),including QUIC routing algorithms and link recovery algorithms on SDN networks,which makes full use of multiple shortest and least-connected paths for multipath QUIC subflows.By comparing this framework with the traditional approach on the simulation platform Mininet and analyzing the experimental results,it is shown that this routing strategy can make better use of network resources,thus improving the efficiency and stability of audio and video transmission.