John S. Baras


Flow Control at Satellite Gateways

Xiaoming Zhou, Xicheng Liu and John S. Baras

Number: CSHCN TR 2002-19, Year: 2002, Advisor: John S. Baras

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Broadcast satellite networks are going play an important role in the global information infrastructure. Several systems including DirecWayfrom Hughes Network System use satellites to provide direct-to-user high speed Internet services. TCP works well in the terrestrial fiber networks but does not work well in satellite hybrid (satellite-terrestrial) networks.

In this paper we analyze the problems that cause this dramatically degradedperformance. Based on the observation that it difficult for an end-to-end solution to solve these problems in this kind of hybrid networks, we propose a connection splitting based solution. A rate-based protocol is designed for the satellite connections and a flow control scheme at the satellite gateways (SGW) used to couple the two split connections together.

Our simulation results shows that our scheme can maintain high utilization of the satellite link and improve fairness among the competing connections.

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