基于多终端协同多流并发传输控制方法及其实现-control method and implementation of multi-stream concurrent transmission base on multi-terminal cooperation.docx

AbstractIn heterogeneous network environments, there are a wide variety of wireless technologies and many kinds of terminals. At the same time, the demands of broadband and real-time service are growing rapidly and unfortunately a single terminal cannot meet the demands. In this circumstance, it is of great importance to make multiple terminals work together to offer high quality of service. Based on the above situations, Virtual Terminals System by available terminals around to provide multi-stream and real-time video transmission service for users is discussed on this thesis.Based on analysis of application requirements, a multi-stream concurrent transmission system based on multi-terminal coordination is designed and implemented. Five parts are included in it: platform of video capture, video distributed transmission server, diversion policy server, context server and multi-terminal coordination. Detailed design of five parts are as follows: real-time video is captured by camera and encoded by H.264 so as to transmit in Internet; video distributed transmission server using parallel TCP distributes video stream according to diversion policy; diversion policy server creates diversion policy according to context information; context server stores context information dynamically; Virtual Terminal System consists of one main terminal at least and one or more slave terminals. Slave terminals download and transmit the packet to main terminal, main terminal sorts the packet. Five parts collaborate with each other. Finally, the multi-steam concurrent transmission system is fully tested and a large amount of test results show that the system performs well and is very stable, which meets the requirements of the design.Keywords:heterogeneousnetworks,multi-terminalcoordination,multi-streamconcurrent transmissionII目录专用术语注释表 ....................................................................................................................................................... 1第一