摘要
根据现有网络的特征,将新型网络断层扫描技术应用于内部链路性能的测量中.通过对基于此技术的现有单播测量方法的改进,得到一种新的单播测量方法——增加时间阈值的单播测量法.这种方法通过设定两个时间阈值,即同一数据包对间的时间阈值与不同数据包对间的时间阈值,来提高获得的有效测量数据,然后通过对数据使用伪似然估计方法——PMLE,计算得到网络链路丢包率.实验表明,该方法计算得到的链路丢包率更加接近真实的网络情况.
According to the characteristics of the existing network,the new network tomography technology is applied to the measurement of the internal link performance.By improving the the existing unicast measurement based on this technology,a new unicast measurement method-adding time threshold to unicast measurement is obtained.This approach sets two time thresholds,namely one between two packets belonging to one pair of b2b and another between two different b2bs,to access more effective measurement data,and then makes use of the pseudo-likelihood estimation method-PMLE to obtain the loss rate of links.Experiments show that the loss rate of link calculated by this new technology is more closed to the real situation of network.
出处
《兰州交通大学学报》
CAS
2011年第1期1-5,共5页
Journal of Lanzhou Jiaotong University
基金
兰州市科技计划项目(2009-1-5)
