Abstract

The goals of improving the quality of existing services and enabling simple implementation of new services have long attracted the attention of telecom operators and inspired the academic and professional community. Despite the huge efforts made to achieve progress in this area, the strict standards that need to be met in terms of hardware and software have significantly slowed down these processes [1]. Great progress was made at the end of the last century with the appearance of the so-called Over-The-Top (OTT) services [2]. Service providers offer new services to users via the telecom operator’s Internet network. One of the first examples of providing services via network operators’ infrastructure (wired or wireless) was the Voice over Internet Protocol (VoIP) service. Although it could not meet the strict Quality of Service (QoS) initially, this service attracted many users, primarily thanks to its financial benefits [3].