Radio Access Network Performance Monitoring And Analysis

In recent years, with the rapid development of communication technology, radio access network and technology are developing by leaps and bounds, constantly moving in the direction of "broadband","data" and "packetization". The higher transmission speeds, enhanced coverage ability and integrated diversification service in the radio access network, which provides a solid foundation for the future services.The development and progress of network technologies provide strong support for all kinds of services. This paper focuses on the service performance in the radio access network, and expanding the application of research based on the current widely used network video service. Mainly do some monitoring and analysis of key performance indicators for the impact of network video quality.Firstly, summarize the transmission technology and protocols of network video, mainly research the subjective and objective assessment methods of network video quality and some network performance indicators, then monitor and analysis video service transmission performance under different conditions of ratio network(such as distance, obstacles).Secondly, monitor and analyze the time domain characteristics of UDP-based network video performance. Build the network video performance test system based on wireless network environment, monitoring different types of network video (HD/SD, different bitrates) MDI performance in real time, and get lots of monitoring data. Consider the time correlation of the monitoring data from the angle of the time series. Establish the accurate ARMA time domain prediction model for the different types of network video respectively, and then we can timely get the video performance changes and adjust the allocation of resources such as bandwidth flexibly.Finally, research the network video evaluation and measurement model based on the TCP protocol. There are no mature standard assessment indicators for network video based on TCP protocol. According to the quality of user experience, this paper defines the initial buffer time, the average buffer time, and buffer frequency as the three key indicators to evaluate the video stream performance. At the same time, according to the three indicators, build the APM evaluation model. Based on this, build wireless test environment and simulation different network impairments (such as bandwidth limitation, packet loss, etc.) to study the influence of the network video quality and user experience.