Congestion control system capable of detecting congestion occurring in an asynchronous transfer mode network and autonomously avoiding the congestion

摘要

A congestion control system comprises an average flowing speed measuring unit for measuring average flowing speed of a transfer packet, a congestion detecting unit for detecting congestion caused by outside blocking based on the average flowing speed, a permissible flowing speed calculating unit for calculating permissible flowing speed of a transfer packet, a flowing speed control unit for controlling the average flowing speed of an entering packet under the permissible flowing speed when detecting congestion, an inside node congestion detecting unit for detecting inside node congestion, a congestion detecting unit for detecting congestion caused by inside blocking from the detection result of the inside node congestion and the congestion caused by the outside blocking, a transfer channel database for storing transfer channel information indicating transfer channels, a transfer channel retrieval unit for retrieving a transfer channel possible to avoid a relay node having the inside node congestion detected when detecting the congestion caused by the inside blocking.