Congestion-based Rate and Power Control in Wireless Cellular Networks
2011 (English)In: 2011 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE (GLOBECOM 2011), New York: IEEE , 2011, 6133508- p.Conference paper (Refereed)
In a cellular network it is necessary to make a trade-off between congestion and Quality of Service (QoS) of the users. To ensure good system performance in uplink of a WCDMA network, control loops are used to adapt to changing radio and interference conditions. A fast inner power control loop updates the transmission powers of the mobiles based on measurements related to QoS, which are compared to a reference value. The reference value is set dynamically by a slower outer rate control loop that uses measurements of congestion. There is a time-scale difference between the loops, but joint dynamics cannot be neglected. In this paper we derive a high order system model with distributed feedback control based on locally measurable information. We model the time-scale difference between the loops and include this in the model. We give sufficient conditions for stability using control theoretic methods and validate the model and results by simulations.
Place, publisher, year, edition, pages
New York: IEEE , 2011. 6133508- p.
, IEEE Global Telecommunications Conference (Globecom), ISSN 1930-529X
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-92082ISI: 000300509000007ScopusID: 2-s2.0-84857222292ISBN: 978-1-4244-9268-8OAI: oai:DiVA.org:kth-92082DiVA: diva2:511986
54th Annual IEEE Global Telecommunications Conference (GLOBECOM) DEC 05-09, 2011 Houston, TX
QC 201203262012-03-262012-03-262012-03-26Bibliographically approved