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Performance Evaluation of SSTP A Transport Protocol for Satellite Channels

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2 Author(s)
Canhoto, A.F. ; Dept. of Telecommun., ITA - Aeronaut. Technol. Inst., Sao Jose dos Campos, Brazil ; Anzaloni, A.

Most of Internet applications use the transmission control protocol (TCP) at the transport layer network. When Internet communications involve a satellite link, characteristics such as long propagation delay (GEO and MEO satellite links) and high bit error rates affect greatly TCP performance. In this work, we propose a new transport protocol, called SSTP, to be used in a satellite communication. SSTP doesn't implement any congestion control algorithm, it uses the sliding-window mechanism and ACK segments. Moreover, retransmissions are made based on SACK information and timeout detection in a different manner in order to recover errors more efficiently than TCP. The objective of this paper is to describe and evaluate SSTP performance comparing it to TCP Reno in a simulation scenario. Using the software OPNET Modeler 10.5A, we simulated a data transfer between two ground stations communicating themselves via a GEO satellite link with different values of BER. As performance parameter, we measured the throughput obtained by TCP and SSTP. In all observed cases, SSTP achieved greater performance than TCP.

Published in:

Advanced Information Networking and Applications Workshops, 2009. WAINA '09. International Conference on

Date of Conference:

26-29 May 2009