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2004

RED for Improving TCP over Wireless Networks

9 years 8 months ago
RED for Improving TCP over Wireless Networks
TCP was designed and tuned to work well on networks where losses are mainly congestion losses. The performance of TCP decreases dramatically when a TCP connection traverses a wireless link on which packets may be lost due to wireless transmission errors. Explicit Congestion Notification (ECN) is known as an effective mechanism that can be used with Active Queue Management (e.g. RED) to control congestion on wired networks. ECN is used by routers to signal incipient congestion to end points. We evaluate the ability of ECN signals as a tool to distinguish between congestion losses and wireless losses. The occurrence of an ECN signal is a bad predictor of imminent congestion losses. We conclude that when TCP senders are responsive to ECN signals, congestion losses appear to be as random as wireless losses. Based on this observation, we propose a simple technique, TCP-Eaglet, to improve TCP over wireless for ECN responsive flows. Simulations results show an improvement in throughput of up...
Saad Biaz, Xia Wang
Added 31 Oct 2010
Updated 31 Oct 2010
Type Conference
Year 2004
Where ICWN
Authors Saad Biaz, Xia Wang
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