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QTCP: an optimized and improved congestion control algorithm of high-speed TCP networks


Qureshi, Barkatullah and Othman, Mohamed and K. Subramaniam, Shamala and Abdul Hamid, Nor Asilah Wati (2011) QTCP: an optimized and improved congestion control algorithm of high-speed TCP networks. In: Second International Conference on Software Engineering and Computer Systems (ICSECS 2011), 27-29 June 2011, Kuantan, Pahang, Malaysia. (pp. 56-67).


TCP researchers evaluated the performance and fairness of different TCP protocols on the basis of new algorithms. The new High-Speed Transport Control Protocols (HS-TCP) were developed but there are still many problems regarding to bandwidth utilization, throughput and packet loss rate. To overcome these problems Quick Transport Control Protocol (QTCP) algorithm based on optimizations of HS-TCP slow start algorithm and Additive Increase and Multiplicative Decrease (AIMD) algorithm have been proposed. A modified algorithm has been developed by using an additive increase approach to grow window with normal speed and to increase scalability by putting constant value of stability of timeline in congestion avoidance phase. This constant timeline gives long stability time; it provides many benefits as compared to other high-speed TCP protocols. The improved algorithm increased throughput and decreased packet loss rate and fairly share link utilization. In this regards several experiment of simulations were observed the fairness. The results show best bandwidth utilization, improved throughput and less packet loss rate as compared to other high speed TCP variants.

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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Computer Science and Information Technology
DOI Number: https://doi.org/10.1007/978-3-642-22170-5_5
Publisher: Springer
Keywords: Fairness; QTCP; AIMD; Congestion avoidance; Throughput
Depositing User: Nabilah Mustapa
Date Deposited: 12 Nov 2019 08:33
Last Modified: 12 Nov 2019 08:33
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/978-3-642-22170-5_5
URI: http://psasir.upm.edu.my/id/eprint/22522
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