Performance Analysis of Explicit Control Protocol (XCP)

摘要

Mathematical analysis of current congestion control algorithms [1, 2] reveals that, as the delay-bandwidth product (BDP) increases, TCP becomes more oscillatory and prone to instability, regardless of the queuing scheme. To address this problem, a novel approach to Internet congestion control is developed recently. This new eXplicit Control Protocol (XCP) delivers the highest possible application performance over a broad range of network infrastructure, including extremely high speed and very high delay links that are not well served by TCP. We analyze the performance of XCP and make comparation with TCP. Extensive simulations show that XCP achieves fair bandwidth allocation, high utilization, small standing queue size, and near-zero packet drops, with both steady and highly varying traffic. In this paper, we investigate the XCP in deep sight; also present a simple network in which XCP is locally stable but globally unstable in the presence of latency. The simulation results verify that XCP remains fairness, high utilization for future high bandwidth-delay product network.