Title: Improvement of TCP Vegas algorithm based on forward direction delay

Authors: Shijie Guan; Yueqiu Jiang; Qixue Guan

Addresses: College of Information Science and Engineering, Shenyang Ligong University, Shenyang 110159, China ' Development and Planning Office, Shenyang Ligong University, Shenyang 110159, China ' College of Information Science and Engineering, Shenyang Ligong University, Shenyang 110159, China

Abstract: Satellite networks transmit data through the space communications protocol specification transport protocol and uses transmission control protocol (TCP) Vegas as the congestion control algorithm. However, TCP Vegas does not have a suitable solution for the asymmetric bandwidth of satellite networks. Therefore, the reverse link of asymmetric bandwidth frequently causes congestion in satellite networks. This issue is addressed by reducing the congestion window with the occurrence of reverse link congestion, thereby simultaneously reducing the forward link throughput of the satellite network. In this study, a forward congestion control algorithm for the TCP Vegas algorithm based on time delay, which is called Vegas_FDD (forward direction delay), is proposed to mitigate congestion by dividing it into different types (forward and backward) and to improve network bandwidth utilisation. The suitability and effectiveness of the proposed algorithm are verified through simulation on Opnet software.

Keywords: communication technology; congestion control; SCPS-TP; TCP Vegas.

DOI: 10.1504/IJWET.2020.107690

International Journal of Web Engineering and Technology, 2020 Vol.15 No.1, pp.81 - 95

Published online: 03 Jun 2020 *

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