congestion propagation

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Congestion Propagation Among Routers in the Internet

In recent years, various non-linear phenomena of the Internet have been discovered. For instance, it is reported that congestion of a router propagates to neighboring routers like a wave. Several researches on congestion propagation among routers have been performed. However, in these researches, cause of congestion propagation and condition that...

Tags: Internet, Router, Osaka University, Congestion Propagation, Routers & Switches, Network Technology, Networking

White papers 2007-11-16

Additional Resources

Robust Control Tools for Traffic Monitoring in TCP/AQM Networks

Several studies have considered control theory tools for traffic control in communication networks, as for example the congestion control issue in IP Internet Protocol routers. This paper proposes to design a linear observer for time-delay systems to address the traffic monitoring issue in TCP/AQM (Transmission Control Protocol/Active Queue Management) networks....

Tags: Theory, Monitoring, IP, Tool, University Of Toulouse-Le Mirail, Productivity, Tcp/Ip, Networking, Network Technology

White papers 2009-02-02

Painful lesson in OLPC mesh networking for Mongolians

The Mongolians have had a painful lesson on mesh networking according to the OLPC current events webpage.  Broadcast storms in the overly dense mesh environment along with excessive mDNS broadcast traffic seem to have crippled the Gobi desert experiment.  Here's an excerpt: We have painfully discovered the limitations of...

Tags: Network, Radio, Access Point, One Laptop Per Child Project, Mesh Networking, Wireless, Networking, George Ou

Blog posts 2008-01-30

Stop the botnets!

This is the intention of Paul Barford, a computer scientist at the University of Wisconsin-Madison. He wants to build a new line of defense against malicious traffic which has become today a billion-dollar 'shadow industry.' As one of 'the most menacing aspects of botnets is that they can go largely...

Tags: Network, Network Intrusion, Nemean, Achilles, Botnet Evaluation Environment, Networking, Security, Roland Piquepaille

Blog posts 2007-11-09

Why 2.4 GHz is a dead end for Wi-Fi

Why 2.4 GHz is a dead end for Wi-FiLOL, good oneIndeed, friends don't let friends do 2.4 GHz only devices and editors shouldn't let their readers do 2.4 GHz only devices.Friends don't let friends buy G-only devices"Only Intel and their logo partners follows the strict policy of not using dual-channels...

Tags: Network technology, Wireless LANs, WIRELESS, microwave, GHz Band, dual-band router, Wi-Fi, router

Discussion threads 2007-07-10

On the Stability of Networks Operating TCP-Like Congestion Control

This paper derives decentralized and scalable stability conditions for a fluid approximation of a class of Internet-like communications networks operating a modified form of TCP-like congestion control. The network consists of an arbitrary interconnection of sources and links with heterogeneous propagation delays. The model here allows for arbitrary concave utility...

Tags: Congestion Control, University Of Cambridge, Network, TCP, Tcp/Ip, Networking

White papers 2007-01-01

TCP-Planet: A Reliable Transport Protocol for InterPlaNetary Internet

The space exploration missions are crucial for acquisition of information about the space and the universe. The entire success of a mission is directly related to the satisfaction of its communications needs. For this goal, the challenges posed by the InterPlaNetary Internet need to be addressed. Current TCP protocols have...

Tags: Georgia Institute Of Technology, Internet, Performance, Performance Degradation, TCP, Space Exploration Mission, Tcp/Ip, Performance Management, Networking, Human Resources, Workforce Management

White papers 2007-01-01

Issues in TCP Vegas

This paper has discussed a few issues of TCP Vegas. It has shown that TCP Vegas could cause a strange behavior when there is a rerouting in the network and connections do not detect such change. It has also demonstrated that a simple scheme that updates baseRTT when the round...

Tags: Network, TCP, Tcp/Ip, Networking

White papers 2007-01-01

Troubleshooting Wireless Mesh Networks

Effective network troubleshooting is critical for maintaining efficient and reliable network operation. Troubleshooting is especially challenging in multi-hop wireless networks because the behavior of such networks depends on complicated interactions between many factors such as RF noise, signal propagation, node interference, and traffic flows. This paper proposes a new direction...

Tags: Network, Mesh Networking, Networking, Wireless

White papers 2006-08-20

Performance Analysis of Large-Scale IP Networks Considering TCP Traffic

This paper proposes a novel analysis method for large-scale networks with consideration of the behavior of the congestion control mechanism of TCP. In the analysis, the paper models the behavior of TCP at end-host and network link as an independent system, and combines them into a single system in order...

Tags: Performance, Network, IP, TCP, IP Network, Analysis, Osaka University, Tcp/Ip, Networking

White papers 2006-02-09

Improving TCP Throughput in 802.11 WLANs With High Delay Variability

Reduced throughput of TCP over wireless networks is mainly due to misinterpretation of wireless losses as congestion signals and high delay variability because of fluctuating radio channel quality. High delay variability often leads to spurious TCP timeouts which result in severe throughput degradation. This paper shows the negative impact of...

Tags: 802.11 Wireless LAN, IEEE 802.11, Network, Variability, TCP, Tcp/Ip, Wi-Fi, Wireless LANs, Wireless, Networking

White papers 2005-07-15