A205 情報ネットワークにおけるパケット流の解析(交通流)

概要

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In a packet communication, the temporal fluctuation of the number of packets in routers has been investigated using a quasi two-dimensional model. Our simplified network consists of routers and transmission lines. They are connected alternately in one-dimension where the packets flow in one direction. Such a one-dimensional flow is a main flow of packets through the main transmission line. In addition to the one-dimensional configuration, other transmission lines are connected to each router, which permits the inflow and also the outflow of packets from and to other routers existing outside the main transmission Line. A router sends one packets to the next router every unit time. The packets sent from one end of the main line and from the external lines obey a Poisson distribution with white power spectrum. The temporal fluctuation of the number of packets in each router is studied numerically and then the power spectrum is calculated. As the amount of packets traveling in the system is increased, large-scale structures appear in the number of packets of each router, resulting in the change of power spectrum from a white spectrum, f^0, to spectra of f^<-0.6〜-1.8> where f denotes the frequency.
社団法人日本機械学会の論文
2001-11-14