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Random Early Detection Gateways for Congestion Avoidance Reviewer: Sayandeep Sen
 

Summary: Random Early Detection Gateways for Congestion Avoidance
Reviewer: Sayandeep Sen
February 20, 2008
This paper presents a scheme to implement conges-
tion control at the gateway nodes. The superiority of
such a scheme (congestion control at gateways) over
end-to-end congestion control comes from the fact
that, a gateway has a global view of current link uti-
lization (can differentiate between queuing and prop-
agation delays). Hence they can trigger congestion
avoidance mechanisms when the delays are conges-
tion induced while letting normal traffic flow to carry
on if high latency is the main culprit for end-to-end
delays. Also, congestion control at gateways could
potentially be part of an architecture to enforce dif-
ferential treatment to flows based on certain metrics
(to maintain fairness between flows).
The method proposed by the authors involves
maintaining a max and a min threshold of permissi-
ble average queue size at the router. Once the queue

  

Source: Akella, Aditya - Department of Computer Sciences, University of Wisconsin at Madison

 

Collections: Computer Technologies and Information Sciences