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TCP Live Experiments on a Real GEO Satellite Testbed
Caini, C.; Firrincieli, R.; Lacamera, D.; De Cola, T.; Marchese, M.; Marcondes, C.; Sanadidi, M.Y.; Gerla, M.;
Computers and Communications, 2007. ISCC 2007. 12th IEEE Symposium on
1-4 July 2007
Page(s):523
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529
Abstract:
The paper describes a measurement campaign recently carried out by University of Bologna (UoB), National Inter-University Consortium for Telecommunications-(CNIT) and University of California Los Angeles (UCLA), on the CNIT GEO Skyplex platform. The aim of the experiments is the performance assessment of a wide range of TCP enhancements on network environments that include a real GEO satellite link. Measurements were carried out by means of the integrated UoB-CNIT testbed, fully controlled by remote through a Web interface. Analysis of live experiments data confirm the challenges posed by GEO sat channels, and show a negative influence of the Skyplex BoD technique on TCP start-up performance. Among the TCP enhancements compared in the paper, best results are provided by TCP Hybla and TCP Westwood, with an advantage of the former in heterogeneous environments characterized by a high level of RTT unfairness.
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