Research And Implementation Of Media Server In VoLTE-Based PRBT

The VoLTE-based PRBT is a kind of business made by the called user to provide a pleasant and colorful video media to replace the normal ring of PRBT.With the development of mobile communication and value-added services,PRBT business has got high market penetration with its personalized service and mature technology.The development of VoLTE provides a new opportunity for PRBT.According to analysis of signal control module and the media module of the based-VoLTE PRBT System,The paper will discuss the research and implementation of media server to play video.At the same time,in order to reduce the transmission error of reference frames and the influence of the error caused by expansion,this paper designs a kind of feedback transmission algorithm and error recovery method to improve the quality of service and improve the user experience.The main work of this paper includes:(1)The research of function and network structure of the VoLTE-based PRBT System and the analysis of the core functions of the media server and the relationship between the media server and other network elements in network and the study of the technology in signaling control and media transmission,which provide a technical foundation for research and implementation of the media server.(2)The design of the communication architecture and communication process between the media server and other modules in the VoLTE-based PRBT system to transport intra message for business control.(3)The design of logic control module in the media server,which can parse and deal with intra message to realize the whole control in the process of the media server.(4)The design of feedback transmission algorithm to realize the transmission of regular RTCP packets and early RTCP packets which can feedback the error information with lower delay.(5)The design of the method about error resilient to reduce the influence of error due to transmission errors of reference frames,which can improve the quality of video transmission and enhance the user experience.