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Modelling and control of IP transport in cellular radio links,
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0001-9810-3478
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
IFAC , 2005.
Keyword [en]
TCP, WCDMA, power control, feedback control, ARQ
National Category
Control Engineering
URN: urn:nbn:se:kth:diva-84778DOI: 10.3182/20050703-6-CZ-1902.01179OAI: diva2:499611
IFAC World Congress, Prague, Czech Republic
QC 20120217Available from: 2012-02-17 Created: 2012-02-13 Last updated: 2012-02-17Bibliographically approved

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Fischione, CarloJohansson, Karl Henrik
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