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Ranking of LTE cells based on key performance indicators using MCDM methods

100%

Lopes Neto P. N. , Freire Junior J. C. , Tuna C. E.

tom 17

46-68

The growth in worldwide data traffic and user subscriptions in mobile telecommunication networks makes it increasingly difficult to manage network performance in an environment already containing multiple radio access technologies. Despite the rise of 5G, LTE remains the dominant technology, and new cells are installed daily to support traffic growth and new services such as voice over LTE. Detecting faulty cells in the network is one of the main concerns of operators. Self organizing networks have been introduced to deal with this problem, and their self healing functionality has improved cell fault management. Nonetheless, faulty cell detection remains challenging, and most of the tasks involved are still done manually. This paper introduces a new method of faulty cell detection in an LTE radio access network, applying multiple criteria methods to this problem. The cells are ranked based on selected key performance indicators, using the multi attribute utility theory to construct a utility function. The analytic hierarchy process is used to define weights for the criteria.

Main Principles of the Complex Assessment of Audit Market Concentration and Audit Services Quality Levels

88%

Steponavičiūtė J. , Zvirblis A.

nr 3

20-33

This paper addresses the conceptual provisions and background models used in assessing audit market concentration as well as complex multiple criteria evaluation of the quality of audit services at the country level. A review of the changes in Lithuania's audit market and analysis of the general methods of estimation of the level of market concentration are presented. The authors discuss modified models for determining the audit market concentration level by applying concentration ratios and the Herfindahl - Hirschman Index.When developing a theoretical basis for the complex assessment of the quality of audit services at the country level (with the emphasis being put first and foremost on Eastern European countries), it is expedient to focus on quantitative methods. Therefore, methodological issues of multiple criteria evaluation are developed by applying the Simple Additive Weighting method on the basis of the created general models. The groups of the essential primary factors are identified while considering these issues.