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2003
IEEE

Kalman Filter Estimation of the Number of Competing Terminals in an IEEE 802.11 network

8 years 10 months ago
Kalman Filter Estimation of the Number of Competing Terminals in an IEEE 802.11 network
Abstract— Throughput performance of the IEEE 802.11 Distributed Coordination Function (DCF) is very sensitive to the number n of competing stations. The contribute of this paper is threefold. First, we show that n can be expressed as function of the collision probability encountered on the channel; hence, it can be estimated based on run-time measurements. Second, we show that the estimation of n, based on exponential smoothing of the measured collision probability (specifically, an ARMA filter), results to be a biased estimation, with poor performance in terms of accuracy/tracking trade-offs. Third, we propose a methodology to estimate n, based on an extended Kalman filter coupled with a change detection mechanism. This approach shows both high accuracy as well as prompt reactivity to changes in the network occupancy status. Numerical results show that, although devised in the assumption of saturated terminals, our proposed approach results effective also in non saturated conditi...
Giuseppe Bianchi, Ilenia Tinnirello
Added 04 Jul 2010
Updated 04 Jul 2010
Type Conference
Year 2003
Where INFOCOM
Authors Giuseppe Bianchi, Ilenia Tinnirello
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