Performance Optimization for IEEE 802.11 with QoS Differentiation Supporting
Performance Optimization for IEEE 802.11 with QoS Differentiation Supporting
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发表时间：
2010
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通讯作者：
Mao Jian
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作者：
Mao Jian
本文将文献中首次提出的简化单类业务网络优化的近似优化公式推广应用于支持QoS的网络，给出了一种基于该公式的自适应优化方案QATC（支持QoS的自适应传输控制），被提出用于IEEE 802.11以优化系统性能，同时提供业务类别之间的服务区分。所提出的方案围绕困难的站点数目估计而工作。它利用从信道感测获得的信息来调整分组发送，针对不同的网络条件，自适应地实现恒定的系统目标。此外，还开发了多速率网络优化方案。仿真结果表明，QATC具有在各种条件下自适应优化网络运行的有效能力，与标准IEEE 802.11 MAC及相关增强协议相比，该方案可以大大提高系统吞吐量，并且系统吞吐量非常接近理论最优值。
In this paper,the extended application of an approximating optimization formula,which is first proposed to simplify the optimization of networks with a single traffic class in the literature,in QoS-supporting networks is analytically justified and numerically investigated.Based on the formula,an adaptive optimization scheme,named QATC(QoS-supporting adaptive transmission control),is proposed for IEEE 802.11 to optimize the system performance,while providing service differentiation among traffic classes.The proposed scheme works around the difficult station number estimation.It utilizes information acquired from channel sensing to adjust the packet transmitting,adaptively towards achieving an invariable system object for different network conditions.Furthermore,the scheme to optimize the multi-rate networks is also exploited.Simulation results show that QATC has an effective ability to optimize the operation of networks adaptively in various conditions,and it can greatly improve the system throughput compared with the standard IEEE 802.11 MAC and related enhancements.Moreover,the system throughput,achieved by the scheme,is very close to the theoretical optimal value.