Congestion occurs in packet-based communication networks when more traffic temporarily enters a network than can be forwarded. Congestion management detects congestion in a communication network and drops or marks packets to mitigate congestion. Still, a few heavy users can monopolize the bandwidth of a bottleneck link, e.g., by opening many flows or using non-responsive transport protocols to send at large data rate. A challenge is to drop or mark the right packets if fair capacity sharing and low delay are desired in a network. We propose activity-based congestion management (ABC), with which users can share a networks capacity fairly within an ABC domain while keeping packet delays low. To that end, activity meters and markers equip user traffic with activity information that reflects a users traffic rate. In case of congestion, traffic with high activity is preferentially dropped on bottleneck links. Thereby, users can achieve a fair share of the networks transmission capacity. Low delay is achieved by leveraging active queue management (AQM) in routers or switches that start dropping traffic in case of congestion to avoid extensive, permanent packet queueing. ABC-AQM is a modification of a normal AQM that increases drop probabilities for high-activity traffic and decreases them for low-activity traffic. The mechanism is easily adaptable to various AQMs.
Further information: PDF
Eberhard Karls Universität Tübingen
Phone: +49 (7071) 29-72639
Dr. Rolf Hecker
As Germany's association of technology- and patenttransfer agencies TechnologieAllianz e.V. is offering businesses access to the entire range of innovative research results of almost all German universities and numerous non-university research institutions. More than 2000 technology offers of 14 branches are beeing made accessable to businesses in order to assure your advance on the market. At www.technologieallianz.de a free, fast and non-bureaucratic access to all further offers of the German research landscape is offered to our members aiming to sucessfully transfer technologies.
firstname.lastname@example.org | TechnologieAllianz e.V.
New Lithium Salts of Pentafluorophenylamide Anions as Electrolytes in Lithium Ionic Batteries
18.04.2017 | TechnologieAllianz e.V.
Gratings on glass surfaces
28.03.2017 | TechnologieAllianz e.V.
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
19.11.2018 | Science Education
19.11.2018 | Ecology, The Environment and Conservation
19.11.2018 | Life Sciences