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Effective Extensions of Internet in Hybrid Satellite-Terrestrial Networks

dc.contributor.authorArora, Viveken_US
dc.contributor.authorSuphasindhu, N.en_US
dc.contributor.authorBaras, John S.en_US
dc.contributor.authorDillon, Douglasen_US
dc.description.abstractDirect PCTM's Turbo Internet is a low-cost hybrid (satellite- terrestrial) high-speed digital transmission system developed as a collaborative effort between the Center for Satellite and Hybrid Communication Networks and Hughes Network Systems. The system uses receive-only VSAT satellite links for downstream data delivery and public telephone networks at modem speeds to provide the upstream communications path. One of the services provided is high speed Internet access based on an asymmetric TCP/IP protocol. In the initial protocol implementation, we achieved four times higher throughput than that of today high-speed modems (28.8 Kbps) alone (Falk 1995). This throughput can be further enhanced. The mismatch in bandwidth and delay in this hybrid network prevents the full use of the satellite link bandwidth (1 Mbps). This paper presents two techniques. TCP spoofing and selective acknowledgement dropping, which significantly increase the overall throughput of the hybrid network. Our approach does not require any modification to the TCP/IP protocol stacks on the end hosts. The solutions proposed in this paper could be used to improve TCP/IP performance of other hybrid networks which have the disadvantage of high bandwidth-delay products and/or low bandwidth return paths. <ul>A revised version of this report has been published in <br><i> Proceedings of the 1st Conference of Commercial Development of Space,</i> Part One, pp. 339-344, Albuquerque, New Mexico, January 7-11, 1996.</ul>en_US
dc.format.extent147567 bytes
dc.relation.ispartofseriesISR; TR 1996-20en_US
dc.relation.ispartofseriesCSHCN; TR 1996-2en_US
dc.subjectRound-Trip-Time en_US
dc.subjectHybrid Internet Accessen_US
dc.subjectSystems Integration Methodologyen_US
dc.titleEffective Extensions of Internet in Hybrid Satellite-Terrestrial Networksen_US
dc.typeTechnical Reporten_US

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