Realization of a push service for Media Points based on SIP

Broadband wireless access systems provide a mobile user with wireless access to a fixed infrastructure, e.g. the Internet/intranet. In general, such systems provide only fragmented islands of coverage. Media Point is a service concept which enhances the capabilities of such broadband wireless access systems in combination with a 2G or 3G mobile system. This paper analyzes how fragmented islands of Media Points can be integrated into the public cellular infrastructure and thus make applications and services accessible to the public. The components that can together form a Media Point network are identified and their functionalities are defined. Finally, SIP (session initiation protocol) as a means to provide managed push-services to the public is described.