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Multi-Cell Admission Control for WCDMA Networks
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS. (CCSlab)
2006 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

It has long been recognized that in multi-cell WCDMA networks the admission of a new session into the system can have undesirable impact on the neighboring cells. Although admission control algorithms that take into account such multi-cell impact have been studied in the past, little attention has been paid to multi-cell admission and rate control algorithms when traffic is elastic. In this thesis, we propose a model for multi-cell multi-service WCDMA networks to study the impact of multi-cell admission and rate control algorithms on key performance measures such as the class-wise blocking and outage probabilities, block error rates, and the noise rise violation probabilities. By means of simulation we compare the performance of load based multi-cell algorithms with that of a single cell algorithm. We find that with multi-cell based algorithms the system capacity and performance (in terms of the above mentioned measures) are (in some cases significantly) better in homogeneous load scenarios as well as in the heterogeneous ’hotspot’ and ’hotaround’ scenarios.

Abstract [sv]

Det har länge varit känt att i multi-cellulära WCDMA nät så kan insläppandet av en ny användarei systemet ha en icke önskvärd effekt på intilliggande celler. Fastän insläppskontrollalgoritmer (AC)som tar hänsyn till sådana multi-cellulära effekter har studerats tidigare, så har endast begränsaduppmärksamhet ägnatsåt multi-cellulär insläpps- och bittaktskontrollalgoritmer när trafiken är elastisk.I detta arbete föreslår vi en modell för WCDMA-nät med multipla celler och multipla tjänster ochsom är applicerbar för studier av av hur multi-cellulär insläpps- och bittaktskontroll inverkar påviktiga prestandamått som klassvisa spärr- och utslagningssannolikheter, blockfelssannolikheter, ochsannolikheten för överträdande av tillåten interferensnivå. Med simuleringar jämför vi prestanda förlastbaserade multi-cellalgoritmer med prestanda för singel-cellalgoritmer. Vi har funnit att med multicellalgoritmerså är systemskapacitetet och prestanda (i termer av tidigare nämnda mått) i några fallbetydligt bättre i homogena lastscenarier, samt i heterogena lastscenarier av typerna ’hotspot’ och’hotround’.

Place, publisher, year, edition, pages
2006. , 66 p.
Series
Trita-ICT-COS, ISSN 1653-6347 ; COS/CCS 2006-11
Keyword [en]
WCDMA, Elastic Traffic, Admission Control, Rate Control, Blocking Probability, Outage Probability
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-92203OAI: oai:DiVA.org:kth-92203DiVA: diva2:512657
Subject / course
Telecommunication Systems
Educational program
Master of Science - Internetworking
Presentation
2006-05-04, Seminar room Grimeton, Isafjordsgatan 30B, Kista, 15:00 (English)
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-03-29 Created: 2012-03-28 Last updated: 2013-09-09Bibliographically approved

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CiteExportLink to record
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