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Modeling and control of IP transport in cellular radio links
KTH, School of Electrical Engineering (EES), Automatic Control.
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0001-9940-5929
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2005 (English)Conference paper (Refereed)
Abstract [en]

A fundamental assumption of the TCP protocol is that packet losses indicate congestion on the network. This is a problem when using TCP over wireless links, because a noisy radio transmission may erroneously indicate congestion and thereby reduce the TCP sending rate. Two partial solutions, which improve the quality of the radio link, are power control and link-layer retransmissions. We consider a radio channel with multiple users and traffic classes, and investigate how parameters in the radio model influences TCP-related quality measures, such as the average delay and the probability of spurious timeout. The results indicate that the outer loop power control is robust to uncertainties in the radio model. This robustness property supports separation between the radio layer design and the IP and TCP layers.

Place, publisher, year, edition, pages
2005. 149-154 p.
, IFAC Proceedings Volumes (IFAC-PapersOnline), ISSN 1474-6670 ; 16
Keyword [en]
ARQ, Feedback control, Power control, TCP, WCDMA, Average delay, Cellular radios, Modeling and control, Multiple user, Outer loop power controls, Quality measures, Radio channels, Radio model, Retransmissions, Robustness properties, Sending rate, Spurious timeout, TCP over wireless, TCP protocol, Traffic class, Automation, Control, Radio broadcasting, Radio links, Robust control, Transmission control protocol, Radio transmission
National Category
Control Engineering
URN: urn:nbn:se:kth:diva-157073ScopusID: 2-s2.0-79960731586ISBN: 008045108XISBN: 9780080451084OAI: diva2:772294
16th Triennial World Congress of International Federation of Automatic Control, IFAC 2005; Prague; Czech Republic; 3 July 2005 through 8 July 2005

QC 20141216

Available from: 2014-12-16 Created: 2014-12-05 Last updated: 2014-12-16Bibliographically approved

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Möller, NielsJohansson, Karl H.
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