Prymak L. Geoinformation support of radio frequency propagation of cellular communication network

The dissertation work is devoted to the solution of the scientific and applied problem of increasing the reliability and accuracy of radiofrequency planning of telecommunication cellular systems based on the use of geoinformation models and methods of geoinformation analysis. The relevance of the dissertation research is determined by the urgency of improving geographic information models and methods for radio frequency planning of telecommunication cellular systems in connection with the rapid 5G development in the world and the implementation of 4G systems in Ukraine. Planning of new generation cellular systems requires the improvement of geospatial models of terrain objects, in particular: increase their accuracy, increase the spatial resolution, detail of geometric characteristics of objects, and their mathematical models considering the peculiarities of telecommunication cellular systems. The study analyses and summarizes the methods of radio frequency planning of telecommunication cellular systems (RFPTCS) based on empirical cartographic models, determines the components of the thematic geospatial dataset for RFPTCS, describes the current state of geoinformation support in Ukraine including Ukrainian legislation, the functionality of global open online platforms for data processing of remote sensing materials and open geoportals for the purposes of RFPTCS. Despite the fact that telecommunications today is one of the most mature services in the world, there are gaps in the standardization of geospatial data flow protocols, data unification and technology to create a thematic geospatial dataset at the level of conceptual and logical models for radiofrequency planning of telecommunication cellular systems. Based on the standard SOU 71.12-37-949: 2014 “Topographic database. Catalogue of objects and attributes" and the standard ISO 19110: 2005 Geographic information - Methodology for feature cataloguing a database model to provide radio frequency planning of telecommunications cellular systems, an object-oriented database about terrain objects and catalogue of vector geospatial objects were developed at the conceptual level in the UML notations. Spatial localization type, set of attributes, and additional topological constraints were proposed for each object type. The conceptual database model developed in the dissertation research provides unification of initial data for radiofrequency planning of telecommunication cellular systems of the third, fourth and fifth generations. The study also offers mathematical models and corresponding technological schemes for constructing components of the thematic dataset to provide RFPTCS such as clutter and clutter height by the batch data processing, which accelerates the formation of thematic dataset compared to existing interactive data processing. The technology of construction of a clutter height based on a surface point cloud has been improved, which increases the heights detail of buildings and vegetation. The developed accuracy estimation model of pass losses and radio signal received power values calculation using GRID-models increases the reliability of accuracy estimation in comparison with traditional "tabular" methods. Empirical studies have substantiated the influence of the thematic dataset resolution for the 4G RFPTCS, the accuracy of representing the heights of obstacle objects in it, and the details of their geometric contours. The proposed geospatial database models for radiofrequency planning of telecommunication cellular systems as so as the technological models of its formation and accuracy estimation models offered in the research can be used by profile enterprises in planning and reconstruction projects of fourth and fifth generation telecommunication cellular systems. The method of estimating accuracy based on a large sample can be applied to continuous rasters which represent signal power values, terrain, temperature values etc. Developments in the field of creating a thematic dataset for RFPTCS meet the general principles of implementation of the national geospatial data infrastructure in Ukraine and can be used in the formation of thematic (profile) datasets of related economic sectors.