Abstract:

A network-measurement-based congestion control scheme is proposed to avoid the limitations resuhing from the AQM (Active Queue Management)mechanism and improve the TCP performance by feeding back timely and correct information on network states to end systems.In the proposed scheme,the measurement facilities dis.tributed in networks ale exploited to acquire the perform ance of network backbone,an d according to the resulting data a fuzzy logic controller is used to help end systems determ ine the appropriate FAST control parameters. Simula-tion experiments indicate that the proposed scheme can support extremely heavy load,achieve high throughput,and steady the queuing delay.Moreover,it behaves more stably and fairly than the AQM scheme in high-speed networks,and is more suitable for P2P like large-volume long.lived flows rather than Web.like bursty traffic.

Key words: network measurement, fuzzy logic control, congestion control, throughput, queuing delay