基于部分网络编码的无线实时多播协议时延随机分布特征研究

In order to study the application of partial network coding based real-time multicast protocol in real-time business, the probability distribution of protocol delay needs to be studied and the delay performance should be predicted. In this paper, using the protocol in MANET, NS2 is used to simulate the protocol and get the end-to-end delay data of data packets. Because the delay data does not meet strict normal distribution, the maximum likelihood estimate method based on the lognormal distribution is used to process the data. Using MATLAB to obtain the delay distribution of the natural logarithm of delay data, then processing data and draw the delay distribution picture with the maximum likelihood estimation method based on the lognormal distribution, the conclusion that the distributions obtained by the above mentioned two methods are basically consistent can be obtained. So the delay distribution of partial network coding based real-time multicast protocol meet the lognormal distribution and the performance of delay can be predicted with the maximum likelihood estimate method based on the lognormal distribution.