区分服务网络中的TCP友好公平体系

A TCP FRIENDLY FAIRNESS ARCHITECTURE FOR DS IP NETWORKS

区分服务(Differentiated Services)是IETF为实现IP服务质量(QoS)而定义的一个体系结构。研究表明,在该体系中存在不公平问题,该文将TCP友好(TCP Friendly)的概念引入到DS网络中,并定义了DS网络中的TCP友好的公平性,仿真验证了目前IETF定义的流量调节(TrafficConditioning)以及丢包策略等机制不能很好地实现TCP友好公平性,因而提出了直接拥塞控制机制来实现这一公平性。

Differentiated Services(DS) architecture has been proposed by IETF to implement QoS in IP networks. However, research shows that there exists unfairness in DS network. This paper introduces the TCP friendly concept into DS network and defines TCP friendly fairness in DS architecture. Elaborate simulations are used to verify that current mechanisms in DS cannot guarantee the TCP friendly fairness; therefore, direct congestion control scheme is proposed to achieve the TCP friendly fairness.