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Issue No.09 - Sept. (2012 vol.11)
pp: 1455-1469
Shravan Rayanchu , University of Wisconsin-Madison, Madison
Vivek Shrivastava , University of Wisconsin-Madison, Madison
Suman Banerjee , University of Wisconsin-Madison, Madison
Ranveer Chandra , Microsoft Research, Redmond
ABSTRACT
This paper introduces models and a system for designing 802.11 wireless LANs (WLANs) using flexible channelization— the choice of an appropriate channel width and center frequency for each transmission. In contrast to current 802.11 systems that use fixed width channels, the proposed system, FLUID, configures all access points and their clients using flexible channels. We show that a key challenge in designing such a system stems from managing the effects of interference due to multiple transmitters employing variable channel widths, in a network-wide setting. We implemented FLUID in an enterprise-like setup using a 50 node testbed (with off-the shelf wireless cards) and we show that FLUID improves the average throughput by 59 percent across all PHY rates, compared to existing fixed-width approaches.
INDEX TERMS
Throughput, Interference, Spread spectrum communication, IEEE 802.11 Standards, Wireless LAN, Sensors, Channel allocation, WiFi., Channel width, conflict graph, scheduling, spectrum
CITATION
Shravan Rayanchu, Vivek Shrivastava, Suman Banerjee, Ranveer Chandra, "FLUID: Improving Throughputs in Enterprise Wireless LANs through Flexible Channelization", IEEE Transactions on Mobile Computing, vol.11, no. 9, pp. 1455-1469, Sept. 2012, doi:10.1109/TMC.2012.89
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