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Achievable bandwidth estimation for stations in multi-rate IEEE 802.11 WLAN cells

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García Villegas, EduardMés informacióMés informacióMés informació
Viamonte Solé, David
Vidal Ferré, RafaelMés informacióMés informacióMés informació
Paradells Aspas, JosepMés informacióMés informacióMés informació
Document typeConference report
Defense date2007-04-16
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 2.5 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 2.5 Spain
Abstract
This paper analyzes the effect of multi-rate transmissions in a CSMA wireless LAN environment. Observations in a real testbed showed that bandwidth resources (in Bytes/s) are shared fairly among all stations even though transmissions carried out at lower rates capture the medium for longer periods, which drastically reduces the overall throughput. The intrinsic concept of fairness in a CSMA scheme with multiple rates is quantified by means of a new formulation which is validated through simulations and practical measurements. The algorithm presented provides the maximum achievable bandwidth that can be offered to a given IEEE 802.11 station. Having this information has evident applications in realtime multimedia transmissions over WLANs. The algorithm was also run in commercial APs as a proof of concept, after analyzing its implementation issues.
URIhttp://hdl.handle.net/2117/1233
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  • Departament d'Enginyeria Telemàtica - Ponències/Comunicacions de congressos [484]
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