Žilinská univerzita v Žiline

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    Growth and Opportunities in Mobile Internet Market in Bulgaria
    (University of Zilina, 2019) Otsetova, Anna; Otsetova-Dudin, Ekaterina
    Nowadays, Internet and mobile technology have changed our way of both doing business and dealing with our daily routine activities. Mobile Broadband Internet represents the fastest growing segment of the European broadband market. Currently, mobile Internet services represent the most promising revenue stream for mobile operators. The present article discusses Bulgaria’s performance against each dimension of the Mobile Connectivity Index (MCI), highlighting the country’s challenges and achievement. The results show that Bulgaria is seriously lagging behind both the leading countries and European Union (EU) Member States.
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    Handoff in Various Mobile Network Technologies
    (University of Zilina, 2019) Otsetova-Dudin, Ekaterina
    Mobile cellular networks are an indispensable part of modern life, where the need for customer satisfaction in the use of many different services by consumers is constantly increasing. The requirements for higher transmission speed, lossless transmission, reliability, efficiency, low latency, mass connectivity, guarantee of high Quality of Service criteria are repeatedly increasing. All this requires the continuous development of the used technologies as well as the introduction of new generations of networks. Handover mechanism is extremely important in cellular network because of the cellular architecture employed to maximize spectrum utilization. To ensure the quality of service in wireless cellular networks, the report proposes the use of a Horizontal Handoff Priority Scheme. Simulation experiments have been carried out, the probability parameters of the scheme have been evaluated and the probabilities of losses occurrence have been classified as rare events. The proposed material are various algorithms and techniques for the implementation of Vertical and Horizontal Handoff in 3G, 4G and fifth-generation networks to provide the required QoS for mobile users with Ultra-High Definition.