Abstract

Delay/disruption tolerant networking (DTN) is designed to cope with extremely long link delay, frequent link disruptions, variable network topology, and high bit error rate (BER) that usually characterize deep space communication. To date, little work has been done in evaluating DTN protocol performance in such a highly stressed communication scenario. In this paper, we present a performance evaluation of DTN transmission protocols for a typical Mars-to-earth communication with a DTN simulator. The performance of Licklider transmission protocol (LTP) is evaluated in comparison with TCP and UDP. Experiment results show that LTP throughput outperforms the other two protocols in deep space communication with different link efficiency and BERs. Moreover, performance of DTN can be improved by adding more repeater node to network.

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