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Enhancement for IEEE 802.11 DCF in fading channels

Xiaokang Lin

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Abstract

The performance of the IEEE 802.11 DCF(distributed coordination function) in fading channels is improved by a scheme that dynamically adjusts the probability of doubling or resetting the contention window according to the network size and channel conditions.The algorithm maximizes the throughput of WLAN(wireless local area network).An analytical model that takes frame errors into account was used to analyze the performance of the new algorithm and DCF in the basic access method.The results show that when the network size,data rate,and frame errors vary,the present scheme always obtains higher throughput than the IEEE 802.11 DCF while remaining compatible with the standard DCF.

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What this paper is about

The performance of the IEEE 802.11 DCF(distributed coordination function) in fading channels is improved by a scheme that dynamically adjusts the probability of doubling or resetting the contention window according to the network size and channel conditions.The algorithm maximizes the throughput of WLAN(wireless local area network).An analytical model that takes frame errors into account was used to analyze the performance of the new algorithm and DCF in the basic access method.The results show that when the network size,data rate,and frame errors vary,the present scheme always obtains higher throughput than the IEEE 802.11 DCF while remaining compatible with the standard DCF.

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Available abstract

The performance of the IEEE 802.11 DCF(distributed coordination function) in fading channels is improved by a scheme that dynamically adjusts the probability of doubling or resetting the contention window according to the network size and channel conditions.The algorithm maximizes the throughput of WLAN(wireless local area network).An analytical model that takes frame errors into account was used to analyze the performance of the new algorithm and DCF in the basic access method.The results show that when the network size,data rate,and frame errors vary,the present scheme always obtains higher throughput than the IEEE 802.11 DCF while remaining compatible with the standard DCF.

Key concepts: Distributed coordination function, IEEE 802.11, Computer science, Fading, Throughput, Frame (networking), Network allocation vector, Channel (broadcasting)

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