Adaptive time window improving convergence of practical delay-based congestion control

Abstract

Copa [1] is a practical delay-based end-to-end congestion control. It can attain a unique Nash equilibrium with other flows with achieving high throughput and low queueing delay. In this paper, we propose adaptive time window [2] which can resolve Copa’s technical problem of initial phase overshoot of the congestion window size caused by slightly long time period for measuring the smallest roundtrip time. Our evaluation results show that our proposed adaptive window improves convergence of congestion window in the initial phase [2] and also shows good performance even in the situation that network jitter fluctuates measured RTT.