Dynamic congestion control for satellite networks employing TCP performance enhancement proxies

TitleDynamic congestion control for satellite networks employing TCP performance enhancement proxies
Publication TypeConference Paper
Year of Publication2004
AuthorsWu, L., F. Peng, and V. C. M. Leung
Conference NamePersonal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Pagination2071 - 2075 Vol.3
Date Publishedsep.
KeywordsBER, bit-error rate, congestion feedback, DVegas, dynamic congestion control mechanism, dynamic Vegas, Earth orbit, error recovery operation, error statistics, Internet, medium access control protocol, reliable data transfer, satellite link, satellite links, satellite network, small aperture terminal, system recovery, TCP flow control, telecommunication congestion control, telecommunication terminals, telecommunication traffic, traffic load, transmission control protocol, transport protocols

Transmission control protocol (TCP) is widely used for reliable data transfer over the Internet. TCP suffers significant performance degradations over satellite networks due to high latency and bit-error rate (BER) of satellite links. Use of performance enhancement proxies between split TCP connections over the satellite and terrestrial Internet segments have been proven attractive to improve TCP performance while keeping the TCP configurations in end systems unchanged. We propose a dynamic congestion control mechanism called dynamic Vegas (DVegas), for the satellite segment in a split TCP connection scenario. This scheme uncouples the TCP flow control and error recovery operations and allows immediate congestion feedback from underlying layers. We model a network of very small aperture terminals accessing a common satellite uplink using a medium access control protocol. Simulation results show that our proposed mechanism improves TCP performance significantly and is more robust when the traffic load is heavy.


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