Analysis And Optimization Of Future Heterogeneous Multipath Streaming Media Transmission Performance

With the large-scale popularization of the mobile Internet and various wireless access technologies(such as WiFi,4G,Bluetooth,etc.),more and more mobile terminal devices are beginning to be equipped with a variety of different standard network interfaces(ie,multi-homed terminals),which It enables users to access rich and real-time streaming media services anytime,anywhere through multi-homed terminals.These multi-homed terminal devices can theoretically realize the parallel transmission of data by using multi-network interface technology.However,the traditional Transmission Control Protocol(TCP)can only support single-path transmission,and cannot implement the multi-homing feature of the mobile terminal to realize parallel transmission of streaming media data.To solve this problem,the Internet Engineering Task Force(IETF)introduced the Multipath Transmission Control Protocol(MPTCP)under the design idea of compatible with the traditional TCP protocol.By aggregating the bandwidth resources of multiple links of a multi-homed mobile terminal,MPTCP distributes the data stream to multiple links,thereby realizing multi-path parallel transmission of data,effectively improving the transmission performance of the streaming media.Although the deployment of the MPTCP protocol provides an opportunity for the development of streaming media applications,with the rapid growth of real-time streaming media services,users are increasingly demanding the transmission rate and network experience of streaming media services.Experiments show that supporting heterogeneous multi-path streaming media transmission services with high bandwidth and low latency is a challenging task.In addition,wireless networks with high bit error rate and easy mobility are towards complexity,streaming applications need to request various types of data,and different types of data have different importance for application issues.These dynamic factors will seriously affect the transmission service quality of multi-path streaming media.Therefore,how to accurately obtain the transmission requirements of the multi-path streaming media transmission protocol in a heterogeneous wireless network environment is the key to realizing the high-quality user experience of the MPTCP protocol in heterogeneous streaming media services in the future.Aiming at the above problems,this paper analyzes the performance of current multi-path streaming media transmission service based on the standard MPTCP protocol and combines the existing MPTCP optimization strategy,and proposes a Priorities-Oriented Data scheduler for Multimedia Multipathing transmission mechanism(PO-MPTCP).This mechanism optimizes the performance of MPTCP in streaming media transport services and provides useful guidance for the practical deployment of MPTCP in future heterogeneous multi-path streaming media transport services.The specific methods are as follows:(1)Aiming at the shortcomings of current MPTCP related research in the process of dynamic streaming media service analysis,an analysis strategy of network background flow and Active Queue Management(AQM)is proposed.Analyze the performance of heterogeneous multipath streaming media data transmission.(2)For streaming media applications,a priority-oriented multi-path streaming media data transmission mechanism is proposed because of the different priorities of data transmission due to different types of data.It allows applications to differentiate the relative importance of data,ensuring that the highest priority data is transmitted on the best quality path,thereby effectively enhancing the overall transmission performance of streaming media applications and bring a better users' experience for multi-path streaming media data transmission.