The doctoral dissertations of the former Helsinki University of Technology (TKK) and Aalto University Schools of Technology (CHEM, ELEC, ENG, SCI) published in electronic format are available in the electronic publications archive of Aalto University - Aaltodoc.
|
|
|
Radio Network Planning and Optimisation for WCDMA
Jaana Laiho
Dissertation for the degree of Doctor of Science in Technology to be presented
with due permission for public examination and debate in Auditorium S4 at
Helsinki University of Technology (Espoo, Finland) on the
1st of July 2002 at 12 o'clock noon.
Overview in PDF format (ISBN 951-22-5902-8) [1113 KB]
Dissertation is also available in print (ISBN 951-22-6009-3)
Abstract
The present thesis introduces the radio network planning process and
optimisation for WCDMA (FDD mode), as defined by 3GPP. This thesis consists of
three parts: modelling and tools for radio network planning, process for
pre-operational network control and optimisation for the operational network.
General challenges to face in 3G network control are based on the fact that
many issues are interconnected and should be simultaneously considered, such as
- Planning means not only to meet current status and demands, but the
solution should also comply with the future requirements by providing an
acceptable development path.
- Traffic modelling is not only the question about the total amount of
traffic growth, but also the question about the future service distribution
and performance demands.
- All CDMA systems have a relation between capacity and coverage.
Consequently, the network planning itself is not only based on propagation
estimation but also on the interference situation in the network. Ideally,
site selection consideration will be done based on the network analysis with
planned load and traffic/service portfolio, taking possible co-siting
constraints into account.
- Provision of multiple services and seamless management of at least two
multiple access systems require rapid evolution of the management tools and
processes. The network performance in terms of capacity, quality, and
implementation and operational costs forms a multidimensional space.
Operators' task will be to convert the business strategy to an operating point
in the performance space in a cost efficient manner.
The contribution of this thesis in terms of modelling and tools is as follows:
- Improvement of the accuracy of radio link budget by introducing power
control headroom (also called fast fading margin).
- Improvement of loading equation by introducing a transmit power
increase term.
- Development of theory and modelling for a planning tool capable of
multi-service and multi-carrier interference, capacity and coverage
analysis.
- Development and implementation an interface taking into account the true
traffic distribution (not uniform) and terminal speed.
In the area of pre-operational planning process the contribution of this
thesis is as follows:
- Development of dimensioning methodology for multi-service network site
density estimation, utilising the modelling of power control headroom,
transmit power increase, soft handover and
Eb/N0.
- Development of radio network planning process for multi-service
environment including capacity and coverage evaluation for a given traffic
mixture, quality and area requirements.
- Analysis of means to improve radio network performance with Mast Head
Amplifier (MHA), diversity reception, sectorisation and proper antenna
selection.
In the area of optimisation of the operational network the contribution of
this thesis is as follows:
- Definition for optimisation target in the case of 3G. The optimisation
will be capacity-quality trade-off management instead of plain quality
improvement process.
- Introduction of Self Organizing Map (SOM) in the analysis of cellular
networks.
- Analysis of the applicability of SOM in WCDMA cellular network
optimisation.
- Introduction of SOM based applications to support network capacity-quality
trade-off management.
It is worth noting that process and methods described in this work are not
limited to 3G systems with WCDMA radio access technology, but they are
applicable to other CDMA standards as well.
This thesis consists of an overview and of the following 9 publications:
- K. Sipilä, J. Laiho-Steffens, M. Jäsberg, A. Wacker, Modelling the impact of the fast power control on the WCDMA uplink, IEEE VTS Proceedings of Vehicular Technology Conference 1999 spring, Houston, Texas, May 1999, pp. 1266-1270. © 1999 IEEE. By permission.
- A. Wacker, J. Laiho-Steffens, K. Sipilä, M. Jäsberg, Static simulator for studying WCDMA radio network planning issues, IEEE VTS Proceedings of Vehicular Technology Conference 1999 spring, Houston, Texas, May 1999, pp. 2436-2440. © 1999 IEEE. By permission.
- J. Laiho, A. Wacker, Radio network planning process and methods for WCDMA, Annals of Telecommunications, Vol. 56, No. 5-6, Mai/Juin 2001, pp. 317-331. © 2001/2002 Hermes Penton Science. By permission.
- H. Holma, Z. Honkasalo, S. Hämäläinen, J. Laiho, K. Sipilä, A. Wacker, Radio network planning, Chapter 8 in H. Holma and A. Toskala (ed.), WCDMA for UMTS, John Wiley & Sons, 2001, Revised Edition. © 2001 Wiley. By permission.
- J. Laiho-Steffens, A. Wacker, P. Aikio, The impact of the radio network planning and site configuration on the WCDMA network capacity and Quality of Service, IEEE VTS Proceedings of Vehicular Technology Conference 2000 spring, Tokyo, Japan, May 2000, pp. 1006-1010. © 2000 IEEE. By permission.
- J. Lempiäinen, J. Laiho-Steffens, The performance of polarisation diversity schemes at a base station in small/microcells at 1800 MHz, IEEE Transactions on Vehicular Technology, Vol. 47, No. 3, August 1998, pp. 1087-1092. © 1998 IEEE. By permission.
- K. Raivio, O. Simula, J. Laiho, Analysis of mobile radio access network using the self-organizing map, Proceedings of IEEE International Conference on Data Mining, San Jose, California, November-December 2001, pp. 457-464. © 2001 IEEE. By permission.
- J. Laiho, K. Raivio, P. Lehtimäki, K. Hätönen, O. Simula, Advanced Analysis Methods for 3G Cellular Networks, Report A65, Publications in Computer and Information Science, Helsinki University of Technology, 2002. Slightly modified version (split to Part I Methods and Part II Applicability of Methods) resubmitted to IEEE Transactions on Wireless Communications end 4/2002. © 2002 authors and IEEE. By permission.
- J. Laiho, M. Kylväjä, A. Höglund, Utilization of Advanced Analysis Methods in 3G Networks, IEEE VTS Proceedings of Vehicular Technology Conference 2002 spring, Birmingham, Alabama, pp. 726-730. © 2002 IEEE. By permission.
Errata of publications 3 and 4
Keywords:
WCDMA, CDMA, radio network planning, optimisation, neural networks,
radio link budget
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
© 2002 Helsinki University of Technology
Last update 2011-05-26