计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2013年
11期
109-113,118
,共6页
无线传感器网络%物理载波侦听门限%能量有效%侦听效能指数%吞吐代价指数%多目标规划%最小均方误差
無線傳感器網絡%物理載波偵聽門限%能量有效%偵聽效能指數%吞吐代價指數%多目標規劃%最小均方誤差
무선전감기망락%물리재파정은문한%능량유효%정은효능지수%탄토대개지수%다목표규화%최소균방오차
Wireless Sensor Network(WSN)%Physical Carrier Sensing(PCS) threshold%energy-efficient%sensing effectiveness index%throughput cost index%multiple objective program%minimum mean-square error
无线传感器网络节点预先绑定的物理载波侦听(PCS)门限无法适应不同噪声。为此，采用圆盘模型分析PCS门限对网络性能的影响，将能量有效的PCS门限配置问题，等效为冲突概率最小与吞吐损失最小的最优PCS门限规划问题，提出一种基于随机噪声的能量有效PCS门限自配置策略(EPCS)。仿真结果表明，在方差为0.01~0.20的高斯噪声条件下，EPCS门限的吞吐率和能量有效性分别下降17.9%和34.1%，均优于预配置PCS门限的性能。
無線傳感器網絡節點預先綁定的物理載波偵聽(PCS)門限無法適應不同譟聲。為此，採用圓盤模型分析PCS門限對網絡性能的影響，將能量有效的PCS門限配置問題，等效為遲突概率最小與吞吐損失最小的最優PCS門限規劃問題，提齣一種基于隨機譟聲的能量有效PCS門限自配置策略(EPCS)。倣真結果錶明，在方差為0.01~0.20的高斯譟聲條件下，EPCS門限的吞吐率和能量有效性分彆下降17.9%和34.1%，均優于預配置PCS門限的性能。
무선전감기망락절점예선방정적물리재파정은(PCS)문한무법괄응불동조성。위차，채용원반모형분석PCS문한대망락성능적영향，장능량유효적PCS문한배치문제，등효위충돌개솔최소여탄토손실최소적최우PCS문한규화문제，제출일충기우수궤조성적능량유효PCS문한자배치책략(EPCS)。방진결과표명，재방차위0.01~0.20적고사조성조건하，EPCS문한적탄토솔화능량유효성분별하강17.9%화34.1%，균우우예배치PCS문한적성능。
Fixed physical carrier sensing threshold is set before Wireless Sensor Network(WSN) nodes are deployed under the environment in actual using, which is not guaranteed that the fixed Physical Carrier Sensing(PCS) threshold set beforehand can work well under different environments noise. Thus, the effects on WSN performances by PCS threshold are analyzed and the problem of configuring an energy-efficient PCS threshold is equivalent to the programming of the optimized PCS to minimize both the conflicts probability and throughput loss, and a strategy for energy-efficient PCS threshold self-configuring based on noise is proposed. Simulation results show that, the throughput and energy-efficiency of the Energy-efficient PCS(EPCS) threshold are reduceding 17.9%and 34.1%respectively when the Gaussian noise with variance being 0.01 changes to the Gaussian noise with variance being 0.2, which are better than the performances of the bound PCS thresholds.
