IPsec supports secure communication over potentially insecure network components such as intermediate routers. IPsec protocols support two operating modes, transport mode and tunnel mode. Explicit Congestion Notification (ECN) is an experimental addition to the IP architecture that provides notification of onset of congestion to delayor losssensitive applications. ECN provides congestion notifi...

We investigate the effect of TCP Explicit Congestion Notification (ECN) with a new response strategy that is more aggressive in the short term, but preserves TCP long term behavior, without modifying the router marking rate. A less aggressive ECN decrease gives more incentives for end systems to become ECN-compliant, as ECN serves as an early warning sign in this case. Our analysis and simulati...

Explicit Congestion Notification is a recently proposed congestion avoidance scheme for IP networks. ECN uses marking packets instead of dropping them in case of incipient congestion. Avoiding packet drops saves network bandwidth and allows congestion signals to be propagated faster. In the paper, we present the results of detailed simulations that we have performed to assess the gain TCP appli...

This memo specifies the incorporation of ECN (Explicit Congestion Notification) to TCP and IP, including ECN’s use of two bits in the IP header.

Congestion control for streaming real-time applications, which need smoothness of the transmission rate, should be transmission control protocol (TCP)-friendly. Moreover, in wireless networks, TCP-friendly congestion control should be based on differentiation of packet losses due to congestion and wireless link error to improve network utilisation. The authors propose a TCP-friendly congestion ...

This paper proposes a congestion avoidance mechanism that addresses unicast (TCP or UDP) as well as multicast (UDP) best effort flows. Our mechanism originally combines Explicit Congestion Notification based on router active queue management to detect congestion, with ICMP source quench messages to inform the involved sources of the network congestion state. The fairness achieved is a trade-off...

This project evaluates performance of of TCP RENO under Random Early Detection (RED) and Explicit Congestion Notification (ECN) -based schemes of congestion avoidance. The evaluation is done in a number of Wide Area Network (WAN) scenarios, which are analyzed for throughput, droprate and fairness.

Wireless Sensor Networks (WSNs) are a specific category of wireless ad-hoc networks where their performance is highly affected by application, life time, storage capacity, processing power, topology changes, the communication medium and bandwidth. These limitations necessitate an effective data transport control in WSNs considering quality of service, energy efficiency, and congestion control. ...

In this paper we present a new traffic management scheme based on an enhanced Explicit Congestion Notification (ECN) mechanism. In particular we used multilevel ECN, which conveys more accurate feedback information about the network congestion status than the current two levels ECN. We have designed a TCP source reaction that takes advantage of the extra information about congestion and tunes b...

Due to the fundamental satellite system characteristics such as global coverage, broadcast nature, and bandwidth on demand, satellite systems are excellent candidates for providing high data rate Internet access and global connectivity accommodating the a wide variety of applications. Provisioning of quality of service (QoS) within the advanced satellite system is the critical requirement. Cong...