A Mobility-aware Broadcasting Infrastructure for a Wireless Internet with Hotspots


Hesselman, Cristian and Eertink, Henk and Widya, Ing and Huizer, Erik (2003) A Mobility-aware Broadcasting Infrastructure for a Wireless Internet with Hotspots. In: 1st ACM International Workshop on Wireless Mobile Applications and Services on WLAN Hotspots, 19 September 2003, San Diego, CA, USA (pp. pp. 103-112).

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Abstract:In this paper, we consider the problem of adaptively delivering live multimedia broadcasts (e.g., for applications such as TV, radio, or e-cinema) to a potentially large number of mobile hosts that roam about in a wireless internet with hotspots. We take a user-oriented approach based on an application-level delivery infrastructure consisting of and managed by (value-added) service providers. The service providers are mobility-aware and offer broadcasts in configurations that are optimized for wireless links and mobile hosts. In hotspots, mobile hosts may be able to simultaneously reach several localized service providers through different interfaces. Within this context, we present the design of a lightweight application-level protocol that enables mobile hosts to select a service provider from which they want to receive a broadcast. Mobile hosts use the protocol to begin receiving a broadcast and to remain connected to the same logical broadcast as they move across subnets. The protocol is independent of the actual stream control protocol (e.g., RTSP) that service providers might use. We show how our protocol can be realized with the existing protocols SIP and SDP. The realization uses SIP in combination with SDP's offer-answer model in a new way.
Item Type:Conference or Workshop Item
Copyright:© 2003 ACM
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/66411
Official URL:http://doi.acm.org/10.1145/941326.941342
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