TCP is shown to be inefficient and unstable in high speed and long
latency networks. The eXplicit Control Protocol (XCP) is a new and
promising protocol that outperforms TCP in terms of efficiency,
stability, queue size, and convergence speed. However, Low et
al. recently discovered a weakness of XCP. In a multi-bottleneck
environment, XCP may achieve as low as 80% utilization at a
bottleneck link and consequently some flows may only receive a small
fraction of their max-min fair rates.
To address this problem, we developed iXCP, an improved version of XCP aimed at achieving Max-Min fair bandwidth allocation. The basic idea is to enable each link to identify the flows bottlenecked at itself and shuffle traffic only among these bottlenecked flows.
Improving XCP to Achieve Max-Min Fair Bandwidth Allocation.
Lei Zan and Xiaowei Yang.
IFIP/TC6 NETWORKING, 2007.
NDS@ICS, UCI