Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2008, Vol. 31 ›› Issue (5): 30-35.doi: 10.13190/jbupt.200805.30.laij

• Papers • Previous Articles     Next Articles

QDB-AQM: the Design of Congestion Control in Gateways Based on Queueing delay

LAI Jun, YE Wu, FENG Sui-li   

  1. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China)
  • Received:2007-12-10 Revised:1900-01-01 Online:2008-10-30 Published:2008-10-30
  • Contact: LAI Jun

Abstract:

An active queue management (AQM) algorithm based on queuing delay is proposed. The algorithm aims to achieve higher throughput, lower queuing delay, short queue size, lower loss rate and better fairness; it has characteristics of simple implementation relative to other AQM algorithms. The key idea is to monitor congestion by queuing delay instead of packet dropping in Drop Tail gateways, and set the estimated value of round trip time (RTT) as the single threshold of congestion detection. If the queuing delay of a packet exceeds the threshold, the packet will be marked according to the mechanism of explicit congestion notification (ECN) to notify transmission control protocol (TCP) source to take measure to respond congestion. Simulation on ns-2 shows that the algorithm is with desired performance.

Key words: gateways, congestion control, active queue management, explicit congestion notification

CLC Number: