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University of Twente

Faculty of Electrical Engineering,Mathematics and Computer Science

(EEMCS)

UMTS Capacity simulation study

Andrs Felipe Cosme Hurtado

Master of Science in TelematicsThesis

(Carried out at Vodafone Netherlands)

Project Supervisors:

Dr. ir. Geert Heijenk, University of Twente Prof. Dr. ir. Boudewijn Haverkort, University of

Twente

Dr. ir. Bert Haverkamp, Vodafone Netherlands

Copyright October 2005, Andrs Felipe Cosme Hurtado, Maastricht, The Netherlands

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i Beneficiario COLFUTURO 2003

Abstract

The purpose of this report is to investigate the performance, measured interms of Key Performance Indicators (KPIs) of a UMTS radio network(UTRAN) under different traffic and mobility scenarios (i.e.homogeneously/ non homogeneously distributed traffic, mobile/non-mobile traffic) and develop some general guidelines for dimensioning theUMTS network optimally.

In this work, simulations are performed using the Wines simulator, whichis a dynamic simulator that models all the radio-resource managementfunctionality of the UTRAN. Two main series of experiments have beenperformed. In the first series simulations have been performed on ananalysis area defined in common agreement with international colleaguesat Vodafone. The distribution of the traffic in this simulation scenario ishomogeneous and the main purpose is to find capacity figures whenincreasing the traffic density of one of the four possible defined services(WWW, FTP, voice and video-call) and also with a given traffic mixinvolving all services together. Two mobility profiles are used (pedestrianand vehicular).

In the second series of experiments, a more realistic scenario, based ondetailed geographical characteristics relevant for signal propagation, andtraffic densities based on traffic maps, has been simulated. The purposewas to analyze the possible differences in capacity between the idealmodel and the more realistic model.

For the single-service scenario analysis, circuit-switched services (speechand video-call), it can be observed that the capacity is mainly uplink-limited. The corresponding results for the packet-switched services (FTP,WEB) have shown that capacity is mostly downlink-limited, as it wasexpected due to the more asymmetrical data rates in the downlinkcompared to the uplink for both services.

For the service mix analysis in both scenarios (homogeneous and nonhomogeneous) it was found that the capacity is mostly downlink-limited(i.e. the downlink power target level is exceeded before the uplink loadtarget level).

In terms of the power-rule usage, no significant differences between thetwo analyzed rules were found, provided that the downlink path lossbetween the Node B connector and the antenna is below 4 dB in all thesites.

Finally, for the mobility study in both scenarios (homogeneous, nonhomogeneous) the theoretically expected behavior was confirmed.

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A.F.COSME.UMTSCAPACITY SIMULATION STUDY

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Acknowledgements

I want to express my gratitude to my Direct Supervisor at University ofTwente, Dr. Geert Heijenk. His knowledge, experience and valuablesuggestions and corrections gave me the effective support when I couldntfind an answer by myself. Special thanks also to Prof. Dr. BoudewijnHaverkort who was also part of my evaluation committee.

I wish to thank also my supervisor at Vodafone-NL, Dr. Bert Haverkamp,for giving me the opportunity to be part of this excellent group of people.Your help was very important to me, not only in the technical side but alsowith the support in everyday tasks, especially at the beginning of myinternship when everything was totally new to me and I didnt knowanyone except you. Thank you very much.

I would like to express also my gratitude to all the Vodafone IT-NetworkDepartment (and in general, to all the people at Vodafone that I had theopportunity to meet) as they always gave me support and were alwayswilling to help me whenever I need it and besides, they were cheering meup and encouraging me to make a good work. I hope not to accidentallyomit anyone in my list: I want to say many thanks to Greg Vourekas,Jamaal Tajaate, Ralph Thijssen, Roy Crutsen, Roy Hermans, BiancaWouters, Simon De Kerpel, Yvonne Lemeer, Zoltan Pitman, TjittePloegstra, Debbie Smits and Arjen Meuers. It was a great experience anda real pleasure to work with such nice persons and high-levelprofessionals like you; Im going to miss you! I wish you all the best inyour professional careers. Special Thanks also to Peter Schneider and Kai

Pannhorst from Vodafone Germany for all the Support with the WinesSimulator Tool. One of the nicest experiences of working here was to beable to work with great people from many other countries!

Im also very grateful to my Lord Jesus Christ, in whose name and inwhose precepts I try to aim every action in my life.

And last but not least, I want to thank all the support and understandingfrom my friends in Colombia, Spain and The Netherlands and to all myfamily, specially to my mother Imelda Roco, my sister Mara Claudia, andmy father Galo Alberto, who always encourage me to pursue higher goalsand cheer me up in the difficult moments. God bless you all and this work

is dedicated to you.

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