Mykhalevskyi D. Methodology for improving the efficiency of estimation of radio channel parameters and characteristics in corporate telecommunications networks

This thesis is concerned with addressing the urgent applied-science challenge of developing a methodology for estimating radio channel basic parameters and characteristics corporate telecommunications networks considering influencing factors based on of statistical links between them in order to improve the technical efficiency of corporate telecommunication networks at the design and optimization stages. The purpose of this thesis is to resolve conflict between the need for increase in the data-transfer rate for improving the quality of information and communication services and the necessity for adaptive optimization of the network to reduce data loss through methods for estimating the radio channel parameters and characteristics in an environment of the limited radio-frequency resource and the influence of internal and external factors on the premises. This is achieved through a detailed study of hardware-based solutions for 5G and Wi-Fi wireless access technology and the processes appearing when sensing traffic in radio channels based the creation of a new approach to estimation of radio channel parameters and characteristics in order to improve the current methods and models of corporate telecommunications network design and optimization. Methods for estimating the basic parameters of radio channels in corporate telecommunications networks have been developed within the methodology. The suggested methods take into account the signal propagation processes, the internal and external influencing factors on the corporate premises; and they are intended to ensure that wireless access network coverage is continuously optimized with the minimum data loss, and the resources are effectively managed in order to obtain optimal performance characteristics of radio channels. A method for estimating the guaranteed bandwidth of radio channels for sending different types of traffic in corporate telecommunications networks has been developed in order to increase the speed of estimation during the initial optimization of the network. For the first time, the integrated factors of radio channel efficiency and the effect of influencing factors have been introduced to predict any data loss within wireless access network coverage. For the first time, a stochastic model of fluctuations of the main parameters of radio channels based on the scattering interval of regression models is proposed, which uses statistical probability and variance. The theory of estimation of radio channel parameters and characteristics in corporate telecommunications networks has been further developed based on generalized mathematical models. The implementation of the suggested methodology in a corporate telecommunications network consists in finding optimal radio channel parameters with the existence of external and internal influencing factors. Based on experimental studies of corporate telecommunications networks it was found that the implementation of the suggested methodology made it possible to achieve 9% increase in the estimation efficiency of the signal strength at the receiver input and 12% increase in the effective data-transfer rate using the transmitting-and-receiving equipment capabilities as compared with the existing methods and models. Moreover, applying the suggested methodology under the significant frequency resource load provided an opportunity for triple increase in the effective data-transfer rate and 8% enhancement of the signal level. Apart from that, it proved possible to double the area of guaranteed information and communication service delivery.