Title: System architecture of a mobile message transport system

Authors: Bernd Gloss

Addresses: Institute of Communication Networks and Computer Engineering, University of Stuttgart, Pfaffenwaldring 47, D-70569 Stuttgart, Germany

Abstract: Many scenarios of beyond-3G mobile communications describe the integration of various access technologies into one system. Being always best connected under certain optimisation criteria will be a crucial point for network operators and mobile users and requires network changes of mobile devices at runtime, the so-called vertical handovers. For those, bandwidth fluctuations up to the order of one or two magnitudes, e.g., when changing from an IEEE 802.11 to a GPRS System, have to be expected, and applications have to cope with them in an user friendly way. Multi-modality and flexible data representations exploiting weights and semantic of transmitted data as means for making applications resource adaptive are currently under investigation. On top of that, device and system-wide adaptation control instances are needed to solve cross-layer and inter-application issues. This requires a rethinking of the classical communication paradigm of OSI-like protocol layering. In this paper, an overview on adaptation in communications is presented and an experimental framework providing system support for application adaptation and adaptation control is introduced as part of the discussion.

Keywords: mobile communications; beyond-3G; adaptive applications; system architecture; wireless technologies; middleware; proxy architecture; vertical handovers; media transcoding; scenario discussion; mobile message transport systems; inter-application issues; adaptation control.

DOI: 10.1504/IJIPT.2007.012370

International Journal of Internet Protocol Technology, 2007 Vol.2 No.2, pp.79 - 87

Published online: 08 Feb 2007 *

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