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Indian Institute of Technology Delhi


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Whitepaper: TCP K-SACK: A Simple Protocol to Improve Performance Over Lossy Links

by Indian Institute of Technology DelhiJan 01, 2008

TCP interprets a packet loss in the network as an indication of congestion. This paper proposes k-SACK, a TCP variant that has considerably improved throughput characteristics over lossy links. A k-SACK source does not consider every packet loss as an indication of congestion. It uses the Selective Acknowledgement option to estimate a parameter lookaheadloss, which is used in congestion detection. The paper shows that when k-SACK is used over wireline internet links, it does not harm the