Comparison of weighted average and median filters for wireless retransmission timeout estimation

Paper

Chan, Auc Fai and Leis, John. 2008. "Comparison of weighted average and median filters for wireless retransmission timeout estimation." Wysocki, Tadeusz A. and Wysocki, Beata J. (ed.) 2008 2nd International Conference on Signal Processing and Communication Systems (ICSPCS 2008). Gold Coast, Australia 15 - 17 Dec 2008 Piscataway, NJ. United States. https://doi.org/10.1109/ICSPCS.2008.4813668
Paper/Presentation Title

Comparison of weighted average and median filters for wireless retransmission timeout estimation

Presentation TypePaper
AuthorsChan, Auc Fai (Author) and Leis, John (Author)
EditorsWysocki, Tadeusz A. and Wysocki, Beata J.
Journal or Proceedings TitleProceedings of the 2nd International Conference on Signal Processing and Communication Systems (ICSPCS 2008)
Number of Pages6
Year2008
Place of PublicationPiscataway, NJ. United States
ISBN9781424442423
Digital Object Identifier (DOI)https://doi.org/10.1109/ICSPCS.2008.4813668
Web Address (URL) of Paperhttp://www.dspcs-witsp.com/icspcs_2008/index.html
Conference/Event2008 2nd International Conference on Signal Processing and Communication Systems (ICSPCS 2008)
Event Details
2008 2nd International Conference on Signal Processing and Communication Systems (ICSPCS 2008)
Parent
International Conference on Signal Processing and Communication Systems
Delivery
In person
Event Date
15 to end of 17 Dec 2008
Event Location
Gold Coast, Australia
Abstract

Estimation of retransmission timeout (RTO) in TCP networks is important in order to maximize throughput. If the RTO is too small, packets will be unnecessarily declared lost, thus resulting in a retransmission. If RTO is too large, applications will wait too long before declaring a packet to be lost, thus reducing throughput. The conventional method due to Karn and Jacobson for estimating RTO is using a smoothing filter [1], [2], and this was later refined to utilize mean deviation measurements [1], [2]. In wireless links, the delay can often be impulsive, and weighted-average filters perform poorly. This paper presents results for mobile wireless transmission, and investigates the use of a median filter for timeout estimation in the presence of competing traffic flows. We demonstrate the applicability of this approach to estimating TCP round-trip times, and UDP packet jitter.

Keywordsmedian filter; TCP; wireless; congestation
ANZSRC Field of Research 2020400604. Network engineering
400607. Signal processing
400608. Wireless communication systems and technologies (incl. microwave and millimetrewave)
Public Notes

© 2008 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Byline AffiliationsDepartment of Electrical, Electronic and Computer Engineering
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