Simulation Analyzing the TCP-friendliness of Available Bandwidth Measurement
Zheng Wen-feng · Journal of Chinese Computer Systems · 2011
Available bandwidth measurement methods which characterized as sending packet trains generate large probe traffic,as so to affect network performance.Three measurement patterns with different packet train length have been designed to simulate typical packet train sending policies,and the TCP-friendliness of available bandwidth measurement are analyzed by simulation.It finds that,the TCP-friendliness of available bandwidth measurement is not so well,as the probe streams increase the delay and packet loss of TCP streams,and trigger the congestion control mechanism.In simulation,it decreases 16% TCP transferred traffic;and larger or shorter packet trains have more influence on TCP performance.The analysis results in a typical available bandwidth measurement tool,Pathload,validated the conclusions,and also application policies of Pathload are concluded.