• Larysa Globa Prof DSc. in Computer Engineering, IEEE Professional Member, Chair of Information-telecommunication Networks, Institute of Telecommunication Systems, “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine,
  • Ievgeniia Svetsynska Master degree student, Institute of Telecommunication Systems, “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine,
  • Ievgen Volvach PhD student, Institute of Telecommunication Systems, “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine,



Big Data, fuzzy knowledge base, fuzzy logic, service quality, integral quality index.


Background. The paper is devoted to review and improvement of existing algorithms for assessing the service provision quality by a telecom operator. Modern approaches to determining the level of service quality in the operator's telecom system require the use of complex mathematical methods and approaches that have significant computational complexity. The proposed
approach to assessment of the provided services quality is based on a generalized quality function defined as the geometric average of the individual quality indicators of the operator's telecom monitoring system and allows the formation of fuzzy knowledge base in the form of the structured rules. To obtain the value of the integral indicator the rules of the fuzzy knowledge base are trained using the desirability function and the clustering method. The data set presentation to obtain from the operator's telecom monitoring system at certain time intervals in the form of the fuzzy knowledge base structured rules allows to reduce the making decision time on the service provision quality significantly, as well as to reduce the computational complexity of the service provision quality determining.
Objective. Improving the service provision quality to the end user through "soft" condition control of the operator's system performance indicators and reducing computational complexity in determining their quality.
Methods. The study was carried out based on a large number of literary sources analysis, the theory of fuzzy logic, clustering methods with using the generalized quality function, the theory of fuzzy knowledge base.
Results. An approach is proposed to determining the integral quality indicator of the provided by the telecom operator to the end user services, obtaining the complex non-structured data estimation based on one integral fuzzy indicator and forming on its basis a knowledge system represented as the fuzzy knowledge base. When forming a fuzzy knowledge base, it takes time to learn
its rules, but this is compensated by computational load reduction on the system during its operation.
Conclusions. The presented research indicates the need to improve the modern telecom operator’s platform for the services provision that realized by an additional block of "soft" services quality management with the help of fuzzy knowledge base. This modification allows instead of processing Big Data from the telecom operator's monitoring system to determine the quality of services based on the rules of the fuzzy knowledge base.
Keywords: Big Data; fuzzy knowledge base; fuzzy logic; service quality; integral quality index.


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