Vasilios A. Siris
and Despoina Triantafylidou
Institute of Computer Science (ICS), FORTH and
In Proc. of IFIP TC6 Networking 2004,
Abstract
We present a new approach
for seamless congestion control over heterogeneous networks containing wired and
wireless IEEE 802.11 links. The approach uses ECN
(Explicit Congestion Notification) as a common signalling mechanism for conveying congestion
information from both wired and wireless
links. Two additional novel aspects of the approach are that ECN marking for a wireless link, due to the way resources
are shared, is performed for both the uplink and the downlink based on
measurements of the aggregate traffic in both directions, and the marking
mechanism dynamically adapts to different traffic and load conditions. Simulation
results demonstrate that our approach achieves higher fairness compared to drop-tail queueing,
while achieving the same utilization, and can effectively control the average
packet delay over the wireless link.
Keywords: congestion
control, Explicit Congestion Notification (ECN), load
and delay monitoring, fairness
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