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Poster Abstract: Measuring Multi-Parameter Con ict Graphs for 802.11 Networks Nabeel Ahmed, Usman Ismail, Srinivasan Keshav {n3ahmed, uismail, keshav}@cs.uwaterloo.ca School Konstantina Papagiannaki ¡ dina.papagiannaki@intel.com of Computer Science, University of Waterloo, ON, Canada ¡ Intel Research, Pittsburgh, PA, U.S.A I. Introduction Dropping prices and increasing demand for a mobile workforce have caused a proliferation of wireless LANs in modern enterprises. In an attempt to increase wireless capacity and provide complete coverage, enterprises are turning to dense deployments of access points (APs). Unfortunately, APs on the same channel that share the air are interference-limited, due to hidden and exposed terminals. Thus, increasing AP density can, paradoxically, reduce aggregate throughput. Proposals aiming to mitigate RF interference in 802.11 networks, such as dynamic frequency selection, power control, and traf c scheduling [1] assume the existence of a con ict graph (CG) as input. A con ict graph is a data structure that encodes interference information between links in the network. Speci cally, for each link, it lists the set of other links which could cause interference either at the transmitter or receiver of the link. Note that the existence of a con ict edge between two links in a CG is
ACM SIGMOBILE Mobile Computing and Communications Review – Association for Computing Machinery
Published: Jan 21, 2010
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