IEEE802.11 DCF中基于能耗最小的RTS門限自適應(yīng)調(diào)整算法
An Adaptive RTS Threshold Adjusting Algorithm Based on Minimum Energy Consumption in IEEE802.11 DCF
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摘要: 該文通過數(shù)學(xué)模型分析IEEE 802.11網(wǎng)絡(luò)中，終端采用分布式協(xié)調(diào)功能(DCF)方式發(fā)送一個(gè)數(shù)據(jù)包消耗的平均能量。研究發(fā)現(xiàn)，存在一個(gè)使終端發(fā)送的平均能耗最小的最佳RTS門限，它與終端的平均重傳次數(shù)直接相關(guān)。在此基礎(chǔ)上，該文提出了一個(gè)RTS門限調(diào)整算法。計(jì)算機(jī)仿真結(jié)果證明該算法能使終端根據(jù)網(wǎng)絡(luò)環(huán)境自適應(yīng)地調(diào)整RTS門限到最佳值，從而減少發(fā)送過程中的能量消耗。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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