摘要
ATM网中ABR多点对点连接的拥塞控制算法的研究目前尚处于起步阶段。已有的研究成果都集中于将原来点对点连接的控制算法移植到多点对点环境中来,尽管这可以方便地实现“基于信源的公平性”,但却不可避免地造成各ABR连接之间的带宽分配不公平。本文研究了“基于VC/信源的公平性”准则下拥塞控制算法的特点,首次提出了这类算法的设计原则,并给出了一种具体的拥塞控制算法。仿真结果表明,该算法不仅能实现“基于VC/信源的公平性”,而且在收敛速度、链路利用率等其它方面也具有良好性能.
Study of congestion control for multipoint-to-point connections are still in early phases. So far the related works focus on extending point-to-point algorithms to multipoint-to-point environment, which can implement 'source-based fairness' easily. But 'source-based fairness' ineans no fairness between VCs at all. So 'VC/source based fairness' may be the better choice. In this paper, issues about designing VC/source based congestion control algorithms are deeply studied. A set of design principles and a congestion control algorithm are proposed in the first time. Simulation results show that this algorithm can implement 'VC/source based fairness', converge fast to steady state, and have high link utilization.
基金
国家自然科学基金资助项目
关键词
拥塞控制
多点对点连接
ABR业务
ATM网
Congestion control, Multipoint-to-point connection, ABR service, ATM
