Istituto di Scienza e Tecnologie dell'Informazione     
Celandroni N., Ferro E., Potort́ F. Goodput Optimisation of Long-lived TCP Connections in a rain-Faded Satellite Channel. In: VTC2004-SPRING - IEEE 59th Vehicular Technology Conference (Milan, Italy, 17-20 May, 2004). Proceedings, vol. 59, Issue 5 pp. 2901 - 2905. EEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2004.
The optimization of the end-to-end throughput of a TCP connection over geostationary satellite links is a challenging research topic because the high delay-bandwidth product, together with a non-negligible random loss of packets, are conditions which differ considerably from the original environment for which TCP was originally designed. As a result, TCP performance is significantly impaired by the channel bit error rate. In this paper we investigate the application of different FEC (forward error correction) types/rates and different bit rates, for the optimization of TCP goodput, in transmissions over a rain-faded geostationary satellite channel, provided that the end-to-end protocols are left unaltered. We compare physical-level FEC techniques, such as convolutional encoding/Viterbi decoding and Reed Solomon, link-level erasure codes and their combinations, over a wide field of signal-to-noise conditions of the satellite channel. The case of multiple connections per link is also analyzed, in addition to that of a single connection per link. . In order to evaluate the throughput of TCP long-lived connections we used a fluid simulator ad-hoc developed.
Subject Goodput
Log-lived TCP connections
Satellite fading
C.2.1 Network Architecture and Design

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