Throughput analysis of the cooperative MAC for IEEE 802.11b wireless LANs

被引：0
作者：
Tang, Jiqiang [1 ]
Zhang, Youguang [1 ]
Shen, Yilan [1 ]
机构：
[1] School of Electronic and Information Engineering, Beihang University
来源：
Advances in Information Sciences and Service Sciences | 2012年 / 4卷 / 01期
关键词：
Cooperative MAC; Throughput analysis; Wireless LAN;
D O I：
10.4156/aiss.vol4.issue1.3
中图分类号：
学科分类号：
摘要：
In this paper, we take a close study at the cooperative MAC (media access control) based on IEEE 802.11b wireless local area networks (LANs) and propose an analytical model to well model the saturation throughput. With the multi-rate support capability, one high rate intermediate node, called helper, is selected to incorporate a new two-hop link instead of the slower direct link under the cooperative MAC (CoopMAC), thereby improving the legacy system performance. The proposed model is conducted from the perspective of cooperative probability that at least one helper exists in different ranges to forward the payload packet with multiple available data rates and their corresponding transmission distances. Furthermore, a bi-dimensional Markov chain rather than an approximation is introduced to model the behavior of CoopMAC. By making use of the weighted sum of the probabilities for the statistics of each source node depending on its location, the saturation throughput of CoopMAC is explicitly formulated. The numerical results show that the model predicts the results obtained by discrete event simulations very accurately at either a small or a large number of nodes, and does it with a processing time that is orders of magnitude faster than the time required by simulation runs.
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页码：19 / 27
页数：8
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