Improving XCP Performance for Multi-bottleneck Topology
Pan Wen-ping · 2008
Owing to the high utilization and well max-min fairness,the eXplicit Control Protocol(XCP) has become one of the standard protocols based on explicit feedback.But further research shows that the performance of XCP degrades in the multi-bottleneck topology.For example,the bottleneck bandwidth is wasted and some flows can't achieve their max-min fair rate.The convergence behaviors of XCP flows in multi-bottleneck topology and the cause of such behaviors were analyzed first,and then a method with explicit relative feedback was proposed.When the convergence of the system is blocked,end system can update its congestion window according to the relative load of bottleneck link.Simulation shows the method effectively improves XCP performance for the multi-bottleneck topology.