IEEE802.11 DCF中基于能耗最小的RTS门限自适应调整算法
An Adaptive RTS Threshold Adjusting Algorithm Based on Minimum Energy Consumption in IEEE802.11 DCF
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摘要: 该文通过数学模型分析IEEE 802.11网络中，终端采用分布式协调功能(DCF)方式发送一个数据包消耗的平均能量。研究发现，存在一个使终端发送的平均能耗最小的最佳RTS门限，它与终端的平均重传次数直接相关。在此基础上，该文提出了一个RTS门限调整算法。计算机仿真结果证明该算法能使终端根据网络环境自适应地调整RTS门限到最佳值，从而减少发送过程中的能量消耗。Abstract: In IEEE 802.11 WLAN, the average energy consumption in transmission per frame through DCF mechanism is analyzed by mathematical model. Further analysis shows there is an optimum RTS threshold that can minimize the average energy consumption per frame. An algorithm of RTS threshold adjustment is developed based on the relationship of average retransmission times and optimum RTS threshold. With this algorithm a station can adaptively adjust its RTS threshold according to network environment in order to reduce energy consumption in transmission. All theoretical analysis and algorithm are validated by computer simulation.
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