End-to-end bandwidth estimation algorithms for Westwood TCP congestion control

Author

Grieco, Luigi Alfredo ; Mascolo, Saverio

Author_Institution

Dipt. di Elettrotecnica ed Elettronica, Politecnico di Bari, Italy

fYear

2003

fDate

16-19 June 2003

Firstpage

563

Lastpage

568

Abstract

Westwood TCP improves efficiency of classic TCP congestion control by introducing an innovative end-to-end bandwidth estimation algorithm. It leaves unchanged the probing phase of classic TCP but it substitutes the multiplicative decrease phase with an adaptive decrease phase, which sets the control windows by taking into account the bandwidth estimate. We show that bunched ACKs can heavily affect the bandwidth estimate and therefore it is necessary to implement an antiACK compression algorithm to properly filter out their effects. Moreover, a comparison of time-invariant and time-varying discrete filters to be used after the antiACK compression algorithm is developed.

Keywords

bandwidth allocation; data compression; discrete time filters; frame relay; low-pass filters; telecommunication congestion control; telecommunication network routing; time-varying filters; transport protocols; Westwood TCP; adaptive decrease phase; antiACK compression algorithm; congestion control; control window; end-to-end bandwidth estimation algorithm; multiplicative decrease phase; probing phase; time-invariant discrete filter; time-varying discrete filter; Adaptive control; Band pass filters; Bandwidth; Channel allocation; Compression algorithms; Filtering; Low pass filters; Phase estimation; Programmable control; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Technology Interfaces, 2003. ITI 2003. Proceedings of the 25th International Conference on

ISSN

1330-1012

Print_ISBN

953-96769-6-7

Type

conf

DOI

10.1109/ITI.2003.1225403

Filename

1225403