The Software Truss Of Data Transmission Module Of The Middleware Of Supporting Mobile Multimedia Communication

In recent years, with the fast development of communication technologies and communication networks technologies, all kinds of burgeoning telegraphic service emerge constantly, of which the mobile multimedia service is the most attractive. Mobile multimedia is the latest service, which is developed by following the criterions of 3GPP, 3GPP2 and WAP forum about multimedia information, and its superior feature is that it can support multimedia function. But the great capacity for multimedia information data, the limitation of mobile phones, the diversity of in-line operation system, diversified incompatible network criterions , changes of the bandwidth of wireless networks and instability of connections are difficult for mobile transmission of multimedia information. The project of the middleware of supporting mobile multimedia communication can solve these problems well for one hand, and prompt the service providers develop mobile multimedia services more availably and faster for the other hand. Its operation needs a nicer communication truss, so the software design of data transmission module is especially important. The main work of the dissertation is as follows:1) The concept, definition and function of mobile middleware areintroduced. The current wireless networks technologies are summarized, and the phylogeny of Wireless Application Protocol is described simply, while the protocol stack and their communication model of WAPl.x and WAP2.0 version...