Author :
Chelouche, Marc ; Héthuin, Serge ; Rame, Louis
Abstract :
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
Keywords :
access protocols; broadband networks; business communication; digital radio; fading; microwave links; multimedia communication; multipath channels; radio networks; spread spectrum communication; telecommunication standards; transceivers; wireless LAN; 1 to 2 Mbit/s; 17.2 GHz; 2.45 GHz; 5.3 GHz; ATM transfer mode; ETSI; HIPERLAN; IEEE 802.11 future standard; MAC layers; RNET; Radio Network; WLAN products; access protocol efficiency; data exchange service; data transfer rates; digital wireless broadband corporate networks; digital wireless broadband private networks; frequency bands; indoor cellular network; multimedia applications; multipath effects; physical layers; radio broadband networks; real-time video; spread spectrum linear ramp waveform; transceiver demonstrator; Broadband communication; Costs; Frequency; Land mobile radio cellular systems; Media Access Protocol; Radio network; Spread spectrum communication; Telecommunication standards; Time division multiple access; Wireless LAN;
