Open Access

ARTICLE

TCPW BR: A Wireless Congestion Control Scheme Base on RTT

by Liwei Tian, Jinfeng Li, Longqing Zhang, Yu Sun, Lei Yang

1 College of Computer Science, Guangdong University of Science and Technology, Dongguan, 523083, China.
2 College of Information Technology, Macau University of Science and Technology, Macau SAR.
3 Department of Information Technology, Huizhou City College, Huizhou, 516025, China.
4 College of Information Engineering, Guangdong Innovative Technical College, Dongguan, 523960, China

* Corresponding Author: Liwei Tian. Email: .

Computers, Materials & Continua 2020, 62(1), 233-244. https://doi.org/10.32604/cmc.2020.06135

Abstract

The wireless network is limited by the transmission medium, and the transmission process is subject to large interference and jitter. This jitter can cause sporadic loss and is mistaken for congestion by the congestion control mechanism. The TCP Westwood protocol (referred to as TCPW) is such that it cannot distinguish between congestion loss and wireless jitter loss, which makes the congestion mechanism too sensitive and reduces bandwidth utilization. Based on this, the TCPW protocol is modified based on the estimate of the Round-Trip Time (referred to as RTT) value-called TCPW BR. The algorithm uses the measured smooth RTT value and divides the congestion level according to the weighted average idea to determine congestion loss and wireless jitter loss. The simulation results show that the TCPW BR algorithm enhances the wireless network’s ability to judge congestion and random errors.

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Citations