A method of data transfer control during handoffs in mobile-IP based multimedia networks
ACM SIGMOBILE Mobile Computing and Communications Review
Ultra-wideband radio technology: overview and future research
Computer Communications
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The radio broadband networks suffer from some specific constraints-access protocol efficiency, multipath effects, and limited available frequency bands-which have to be overcome by choosing the best possible compromises in cost/performance on physical and MAC layers. Current WLAN products (1-2 Mb/s at 2.45 GHz), which provide mainly data exchange service, are able to make seamless handover for an indoor cellular network but suffer from relatively low data rates. Even if compliant with the IEEE 802.11 future standard, they do not necessarily lead to interoperability. New generations become necessary for higher data transfer rates, real-time video, and multimedia applications compatible with the future ATM transfer mode. ETSI is proposing the HIPERLAN concept, working in the 5.3 and 17.2 GHz bands. Our contribution to this new standard, called RNET (Radio Network), uses a spread spectrum linear ramp waveform with enhanced capabilities (relative to the TDMA, CSMA/CA, and FDMA structures). The advantages of the MAC layer are highlighted and the first results of a transceiver demonstrator are given