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Estimating Retransmission Timeouts in IP-Based Transport Protocols

Authors:
Stan McClellan
Wuxu Peng

Keywords: SCTP; retransmission timeout; round-trip time; RTT; RTO; Jacobson algorithm; Chebyshev approximation; parameter estimation; upper bound

Abstract:
This paper analyzes the algorithm used for estimating retransmission timeouts in connection-oriented IP-based transport protocols, such as the Transmission Control Protocol (TCP) and the Stream Control Transmission Protocol (SCTP). The estimation algorithm uses historical values of the round-trip time to estimate future round-trip delays, and so creates a maximum waiting time before triggering retransmission attempts. The purpose of the analysis is to question / validate some of the fundamental assumptions used in the estimation algorithm. The conclusion of the analysis is that the algorithm is somewhat mismatched to the application area. Alternative algorithms are discussed, and potential modifications are presented.

Pages: 26 to 31

Copyright: Copyright (c) IARIA, 2013

Publication date: April 21, 2013

Published in: conference

ISSN: 2308-3964

ISBN: 978-1-61208-262-2

Location: Venice, Italy

Dates: from April 21, 2013 to April 26, 2013