A Performance Studym of Explicit Congestion Notification (ECN) with Heterogeneous TCP Flows

A RED modified weighted moving average for soft real-time application

“…An alternative for the RED mechanism may be ECN (Explicit Congestion Notification) (Kinicki and Zheng, 2001). The ECN mechanism detects an overload between two network nodes and marks transmitted packets by a specific bit.…”

Adaptive explicit congestion notification

“…Preliminary ECN and RED simulations were run to confirm the behavior seen in [9] with the difference being that the aggregate flow capacity (referred to as demand) was reduced from 300 Mbps to 90 Mbps. Figure 2 presents average RED and ECN goodput as the number of flows generating the demand is varied from 30 to 450 for three max p settings.…”

“…However, most of the previous RED/ECN research has focused on networks with a small number of homogeneous flows. This investigation builds on recent results [9] and uses ns-2 simulations to evaluate the potential of an Adaptive ECN (AECN) mechanism to improve fairness for a large number of heterogeneous TCP flows.…”

“…The performance metrics used in this investigation include delay, goodput, Jain's fairness, and a visual form of max-min fairness [9]. Delay is the time in transit from source to destination and includes queuing time at the router.…”