一种跨网关传输媒体流方案的研究与实现

A Scheme of Multimedia-data Transmission over Gateway and Control-packet Protocol

对于传统的桌面型视频会议系统,只能实现同一局域网内的两个客户端通信,或者一方具有独立IP地址的情况,这种弊端限制了此系统的应用范围。提出采用服务器中转来实现不同局域网间客户的音视频流通信,并提出一个基于TCP/IP的自定义控制协议来协调客户与服务器之间通信,然后根据此协议在服务器端及客户端编程实现。这样可以提高原系统的可扩展性,并在多客户通信时节约IP地址。

A client of the Traditional Desktop-Video-Conference can only communicate other clients in Internet or in the same LAN, it cannot communicate with clients in the different LAN, so it is limited in use. In this paper, we bring forward a scheme which uses a server in Internet to transfer the Multimedia-data between two clients in different LAN, and also a TCP-IP based Control- Package- Protocol is promoted to correspond the communication of the Server and clients. The result show that the expansibility of the traditional system is promoted and IP address in Internet is also thrift.