Self-Similarity in Cell Dwell Time Caused by Terminal Motion and Its Effects on Teletraffic of Cellular Communication Networks(Special Section on Multi-dimensional Mobile Information Networks)

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This paper discusses self-similarity in cell dwell time of a mobile terminal, the discovery of which was described in our previous paper [1], and its effects on teletraffic of mobile communication networks. We have evaluated various teletraffic statistics, such as cell dwell time and channel occupancy time, of a mobile terminal based on measurements of motion for various types of vehicles. Those results show that cell dwell time follows a long-tailed log-normal distribution rather than the exponential distribution that has been used for modeling. Here, we first elaborate on self-similarity in cell dwell time of various vehicles. We then evaluate self-similarity in channel occupancy time. For future mobile multimedia communication systems employing a micro-cell configuration, it is anticipated that data communication will be the main form of communication and that call holding time will be long. For such cases, we have shown that channel occupancy time will be greatly affected by the cell dwell time of the mobile terminal, and that self-similarity, a characteristic that is not seen in conventional systems, will consequently appear. We have also found that hand-off frequently fails as self-similarity in cell dwell time of a mobile terminal becomes stronger.
社団法人電子情報通信学会の論文
2002-07-01