Interaction between TCP Reno and TCP Vegas in end-to-end congestion control

Abstract

This paper addresses incompatibility issues between TCP Reno and TCP Vegas. In order to investigate the bandwidth sharing between both versions of TCP in heterogenous network environments, analytical expressions for throughput and Jain's fairness index are derived. Further, based on the Explicit Congestion Notification (ECN) technique and the Random Early Detection (RED) algorithm, we propose a new algorithm to be incorporated in TCP Vegas for securing its compatibility with TCP Reno. The new form of TCP Vegas is simulated using the discrete event simulator NS-2. Simulation results show that our new algorithm can effectively restrict TCP Reno from unfairly grabbing the bandwidth share of TCP Vegas. © Springer-Verlag Berlin Heidelberg 2004.