Studying Semi-TCP and Its Application in Marine Internet

Liang Zhou, Sheng-Ming Jiang, Chen-Lin Xiong
2018 Future Internet  
TCP protocol has good performance on the Internet, but its performance is significantly reduced when it is applied to Marine Internet (MI). How to improve the performance of TCP protocol in Marine Internet has become an important research topic. In this paper, an improved Semi-TCP is adopted for Marine Internet, and the implementation scheme of Semi-TCP congestion control is introduced. The exposed terminal problem and congestion control problem of high load networks are analyzed in detail. By
more » ... yzed in detail. By using a timer, the congestion control algorithm is improved. Performance analysis and comparison of TCP-Lite, Semi-TCP-RTS, and improved Semi-TCP (Semi-TCP-RTS-V2) are carried out on Exata simulation platform, and the experimental results show that Semi-TCP-RTS-V2 has better transmission performance in ship ad hoc networks. Different from the above-mentioned TCP variants proposed for wireless networks, Semi-TCP puts the congestion control function originally in the transport layer to the data link layer [12] so that the controller can learn accurately and quickly the congestion status of the network. Through hop-by-hop control, it can improve the efficiency of congestion control. The marine Internet has the characteristics of low node density, high channel loss rate, and relatively stable node movement speed [13] . Combined with the characteristics of the Marine Internet, this paper enhances the congestion control method of Semi-TCP using RTS/CTS (Request To Send/Clear To Send) to improve TCP transmission performance in the Marine Internet.
doi:10.3390/fi10060044 fatcat:2tp2jybhkfgonosl2j5be5fwsi