Preface

Abstract

In this issue of the Journal of Telecommunications and Information Technology we have collected a set of fourteen papers documenting a broad range of topics related to modern wire and wireless telecommunications networks. Rapid advances in wire and wireless technologies have significantly accelerated the introduction of new technologies and services, defining and building the rules to ensure the transfer of huge volumes of data. 
Quality of Service is becoming one of the most important criteria for the selection of old and new services and technologies. Two papers in this issue are related to this topic. In the first one, QoS Requirements as Factor of Trust to 5G Network, the authors V. Tikhvinskiy, G. Bochechka, and A. Gryazev discuss the role of QoS in the formation of trust in both consumers and regulators in the case of the 5G network. The second article, entitled Digital Audio Broadcasting or Webcasting: A Network Quality Perspective, describes the advantages and disadvantages of digital audio broadcasting and webcasting transmission techniques from a network quality perspective. The authors P. Gilski and J. Stefański present a case study of user expectations with respect to the perceived quality of real digital broadcasted and webcasted radio stations.  (...)