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Broadband Internet Access over Digital Video Broadcast (DVB)

The ongoing technical progress of communications networks results in a convergence of traditionally separated networks and services. One result of this convergence is the use of digital broadcast networks (e. g. terrestrial digital video broadcast DVB-T) as access networks not only for video, but also for data services, e. g. internet/WWW. Our paper presents a system for sending HTML pages over a DVB-T network. To enable the access of WWW services for mobile users, the part of the bandwidth in the DVB-T system currently not occupied by television channels can be used for data transmission. To allow the flexible and efficient development of new services, the system design has to support the reuse of components and a systematic tool-assisted implementation. In detail our paper describes the building block oriented design of the entire system, the developed transmission method to transfer IP packages over DVB-T and the developed HyperText Push Protocol (HTPP) for the transmission of HTML pages over unidirectional channels. Furthermore, we explain the prototype implementation of the system in softand hardware with the use of the specification languages SDL and VHDL.