Date Added: Jul 2009
In recent years, various non-linear phenomena of the Internet have been discovered. For instance, it is reported that congestion of a router propagates to neighboring routers like a wave. Several researches on congestion propagation among routers have been performed. However, in these researches, cause of congestion propagation and condition that congestion propagation occurs has not been sufficiently investigated. In this paper, the authors reveal a cause of congestion propagation, and also investigate under what conditions congestion propagation is observed.