TCP ADaLR+: Enhanced TCP Scheme for GEO Satellite Networks

Liang Zong^1,2, Wencai Du¹, Yong Bai¹

COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12B) 264-270

¹College of Information Science & Technology, Hainan University, Haikou, Hainan 570228, China
²Department of Information Science and Engineering, Hunan University of Humanities, Science and Technology, Loudi, 417000, China

TCP performance is essential for data transmissions over the satellite network. The TCP ADaLR is congestion control algorithm that the sender judgments the relevant window change and measures round-trip time to control congestion window. It can adapt to the characteristics of the satellite link and improve the performance of TCP than conventional TCP (New Reno). However, it doesn’t take into account distinction of random packet loss and congestion packet loss like the TCP Veno. In this paper, we propose further enhancement scheme of TCP ADaLR, called TCP ADaLR+, which can distinguish between random packet loss and congestion loss. The improved performance of proposed TCP ADaLR+ is demonstrated by simulations. In all simulation scenarios, TCP ADaLR+ outperforms TCP ADaLR and TCP Veno in terms of satellite link throughput and FTP download response time.