On the optimal contention window size in IEEE 802.11 based WLANs under co-channel interference

8th International Conference on Electrical and Computer Engineering Pub Date : 2014-12-01 DOI:10.1109/ICECE.2014.7026888

Tasnova Nasrin Munni, Nazia Mahbub, Kaim Iftahaj Nirjhor, M. Uddin

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引用次数: 6

Abstract

Throughput in IEEE 802.11 based wireless local area networks (WLANs) significantly depends on the minimum contention window (CW) parameter of CSMA/CA medium access control protocol. The throughput-optimal value of the minimum CW is modeled by G. Bianchi for a single WLAN without considering co-channel interference as N√2Tc, where N is the number of contending nodes in the WLAN and Tc is the collision time in mini-slots [1]. In this paper, the throughput-optimal configuration of the minimum CWs of the CSMA/CA based WLANs is studied under co-channel interference via extensive simulations. From the simulation results, it is investigated that in a WLAN the optimal value of the minimum CW is 4% to 25% higher than the Bianchi optimal CW due to co-channel interference. However, in WLANs, the optimal throughput is very close to the throughput obtained at the Bianchi optimal CW. In WLANs, very close to the optimal throughput can be obtained by configuring each WLAN independently with the simple Bianchi model even when the co-channel interference is considered.

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同信道干扰下基于IEEE 802.11的无线局域网中最优争用窗口大小研究

基于IEEE 802.11的无线局域网的吞吐量很大程度上取决于CSMA/CA介质访问控制协议的最小竞争窗口(CW)参数。G. Bianchi在不考虑同信道干扰的情况下，将单个WLAN的最小CW的吞吐量最优值建模为N√2Tc，其中N为WLAN中的竞争节点数，Tc为mini-slot中的碰撞时间[1]。本文通过大量的仿真研究了在同信道干扰下，基于CSMA/CA的无线局域网最小信道带宽的吞吐量最优配置。仿真结果表明，在无线局域网中，由于同信道干扰，最小连续波的最优值比比安奇最优连续波高4% ~ 25%。然而，在无线局域网中，最优吞吐量非常接近Bianchi最优CW的吞吐量。在WLAN中，即使考虑到同信道干扰，使用简单的Bianchi模型独立配置每个WLAN也可以获得非常接近最优的吞吐量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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8th International Conference on Electrical and Computer Engineering

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