无线区域网路中自我相似交通流量之.pptx

無線區域網路中自我相似交通流量之成因與效能評估 The origin and performance impact of self-similar traffic for wireless local area networks報 告 者：林 文 祺2021/5/28OutlineBackground of Self-SimilarityProperties of WLAN Traffic Estimation of Self-Similar TrafficThe Origin of Self-Similarity in WLANImpact of Self-Similar to CSMA/CA performanceImpact of Self-Similar to CSMA/CA performance with RTS/CTS2021/5/28Background of Self-Similarity(1/8)Self-Similarity and Fractal2021/5/28Background of Self-Similarity(2/8)Statistics of Self-SimilarityDefinition of Self-Similar Stochastic Process:H: Hurst parameter or self-similarity parameter2021/5/28Background of Self-Similarity(3/8)Self-Similarity of StatisticsDefinition of Self-Similar Stochastic Sequence:Ex. 2021/5/28Background of Self-Similarity(4/8)Properties of Self-SimilarityLong range dependenceSlowly decaying varianceHeavy-tailed distribution2021/5/28Background of Self-Similarity(5/8)Self-Similar Traffic2021/5/28Background of Self-Similarity(6/8)Pareto Distribution: X(t) is a Pareto distribution random process with shape parameterαand location parameter k.2021/5/28Background of Self-Similarity(7/8)Variance-time Plot 2021/5/28Background of Self-Similarity(8/8)R/S Plot2021/5/289、 人的价值，在招收诱惑的一瞬间被决定。10、低头要有勇气，抬头要有低气。11、人总是珍惜为得到。12、人乱于心，不宽余请。13、生气是拿别人做错的事来惩罚自己。14、抱最大的希望，作最大的努力。15、一个人炫耀什么，说明他内心缺少什么。。16、业余生活要有意义，不要越轨。17、一个人即使已登上顶峰，也仍要自强不息。9、 人的价值，在招收诱惑的一瞬间被决定。10、低头要有勇气，抬头要有低气。11、人总是珍惜为得到。12、人乱于心，不宽余请。13、生气是拿别人做错的事来惩罚自己。14、抱最大的希望，作最大的努力。15、一个人炫耀什么，说明他内心缺少什么。。16、业余生活要有意义，不要越轨。17、一个人即使已登上顶峰，也仍要自强不息。Properties of WLAN Traffic(1/2) Basic: 1 μSAggregation: 1, 0.1, 0.01 SecEnvironment: 7NBTime Unit=1 SecTime Unit=0.1 SecWLAN trafficTime Unit=0.01 Sec2021/5/28Properties of Real Network(2/2) Time Unit=1 SecTime Unit=0.1 SecPoisson trafficTime Unit=0.01 Sec2021/5/28Estimation of Self-Similar Traffic(1/2)Packets Sequence on WLAN2021/5/28Estimation of Self-Similar Traffic(2/2)Variance Plot & R/S Plot 2021/5/28The Origin of Self-Similar Traffic (1/3)Single Source wit