Packet fragmentation in Wi-Fi ad hoc networks with correlated channel failures

A. Lyakhov, V. Vishnevsky
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引用次数: 12

Abstract

We present an analytical method for estimating the saturation throughput of an 802.11 ad hoc LAN called also the Wi-Fi (wireless fidelity) LAN in the presence of noise distorting transmitted frames. This is the first method that allows analytical study of the Wi-Fi network performance with consideration of correlated channel failures usually inherent to wireless channels. Within the study, we consider the possible packet fragmentation that can be adopted to reduce the performance waste caused by noise-induced distortions. In addition to the throughput, our method allows estimation of the probability of a packet rejection occurring when the number of packet transmission retries attains its limit. The obtained numerical results of investigating Wi-Fi LANs by the developed method are validated by simulation and show high estimation accuracy as well as the method efficiency in determining the optimal fragmentation threshold.
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具有相关信道故障的Wi-Fi自组织网络中的数据包碎片
我们提出了一种分析方法,用于估计802.11自组织局域网(也称为Wi-Fi(无线保真)局域网)在存在噪声失真传输帧的情况下的饱和吞吐量。这是第一个考虑到无线信道固有的相关信道故障对Wi-Fi网络性能进行分析研究的方法。在研究中,我们考虑了可能采用的数据包碎片,以减少由噪声引起的失真造成的性能浪费。除了吞吐量之外,我们的方法还允许在数据包传输重试次数达到限制时估计数据包拒绝发生的概率。通过仿真验证了该方法对Wi-Fi局域网的数值研究结果,表明该方法具有较高的估计精度和确定最优分片阈值的效率。
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