ECN Congestion Control Mechanism in IP Networks

Performance Evaluation of Explicit Congestion Notification (ECN) in IP networks

This memo presents a performance study of the Explicit Congestion Notification (ECN) mechanism in the TCP/IP protocol using our implementation on the Linux Operating System. ECN is an end-to-end congestion avoidance mechanism proposed by [6] and incorporated into RFC 2481[7]. We study the behavior of ECN for both bulk and transactional transfers. Our experiments show that there is improvement i...

add Explicit Congestion Notification ( ECN ) to IP

This note describes a proposed addition of ECN (Explicit Congestion Notification) to IP. TCP is currently the dominant transport protocol used in the Internet. We begin by describing TCP’s use of packet drops as an indication of congestion. Next we argue that with the addition of active queue management (e.g., RED) to the Internet infrastructure, where routers detect congestion before the queue...

ECN Marking for Congestion Control in Multihop Wireless Networks

In this paper we propose an approach to increase TCP’s fairness in multihop wireless networks, using ECN as a congestion signalling mechanism. The novel idea we introduce is that the marking probability at a wireless node is a function of the aggregate utilization in the node’s neighborhood, which is determined by the sum of the receiving rates of all nodes within its collision domain. A node’s...

Congestion Control Schemes for TCP/IP Networks

This paper describes six methods for controlling congestion for TCP connections. The first four, Slow Start algorithm [5], Tri-S [8], DUAL [7], and TCP Vegas [1] treat the network as a black box, in that the only way to detect congestion is through packet loss and changes in round trip time, or throughput. The last two, Random Early Detection [4] and Explicit Congestion Notification [3] depend ...

The Addition of Explicit Congestion Notification (ECN) to IP