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Feedback based distributed admission control in 802.11 WLANs

DSpace at IIT Bombay

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Title Feedback based distributed admission control in 802.11 WLANs
 
Creator PATIL, P
MATHUR, V
APTE, V
MOUDGALYA, K
 
Subject mac
 
Description A distributed connection admission control (CAC) scheme where stations independently admit or reject flows based on channel utilization threshold is easy to implement for WLANs. However, owing to variable protocol capacity, the advisable threshold also is variable, limiting the efficacy of fixed threshold based CAC. If the admission threshold is tuned to reflect the current protocol capacity, better throughput can be obtained while avoiding WLAN overload. In this paper, we propose a feedback based scheme to tune the utilization threshold for admission. We select he performance metric used for feedback, derive the system model from empirical data, and use control theory to design a feedback controller. Further, we present an analytical model and heuristics using which the controller can be adapted to work under diverse operating scenarios. Simulation results of proportional and proportional-integral controllers in OPNET suggest that the feedback based CAC is able to avoid WLAN overload and achieve high throughput despite large changes in protocol capacity.
 
Publisher IEEE
 
Date 2011-10-25T00:54:02Z
2011-12-15T09:11:50Z
2011-10-25T00:54:02Z
2011-12-15T09:11:50Z
2009
 
Type Proceedings Paper
 
Identifier 2009 IEEE 34TH CONFERENCE ON LOCAL COMPUTER NETWORKS (LCN 2009),293-296
978-1-4244-4488-5
0742-1303
http://dx.doi.org/10.1109/LCN.2009.5355091
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15560
http://hdl.handle.net/100/2326
 
Source IEEE 34th Conference on Local Computer Networks,Zurich, SWITZERLAND,OCT 20-23, 2009
 
Language English