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An Algorithm to Identify High-Bandwidth Flows Based on Packet Drop History

The cache management technology based on packet drops is an important functional module as the packet forwarding device. A BDH-RED (RED with Based on Drop History)algorithm was proposed to identify high-bandwidth flows in times of congestion. The algorithm would keep these flows state if some flows happened to drop packets, based on the method which the number of packet drop was roughly proportional to the arrival rate from a flow. The algorithm computed the number of drop in packet drop history in the routers, uses combined drop ratio, and efficiently identified high-bandwidth flows in the coexistence environment between the normal TCP flows and high-bandwidth flows. By the comparison of existed drop ratio and combined drop ratio, the simulations proved that BDH-RED can efficiently identify high-bandwidth flows.