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The Session Initiation Protocol (SIP) is a multimedia signalling protocol that has evolved into a widely adopted communication standard. The integration of SIP into existing IP networks has fostered IP networks becoming a convergence platform for both realtime and non-real-time multimedia communications. This converged platform integrates data, voice,(More)
NGN (next generation network) will bring many benefits to network operators. Operators that deploy it can potentially offer a much wider range of applications and services, to subscribers irrespective of their location, at reduced cost and complexity. NGN will allow operators to increase their revenues through the additional services that can be offered,(More)
The Session Initiation Protocol (SIP) is a signalling protocol developed to set up, modify and tear down multimedia sessions such as voice and video calls, game sessions, messages exchange and the like over the Internet Protocol (IP). A few of protocols have been design for it. However, the SIP seems to be the most relevant protocol with the future. That’s(More)
Convolution is a primary mathematical operation used in many signal processing and analysis algorithms. High dependence of the complex systems on the correct operation of the convolver demands its continual improvements mostly related to the decrease of resource consumption. The paper proposes a model of 2D convolution massively used in the algorithms of(More)
Over the last few years, Internet Protocol (IP) networks have made significant progress, allowing to provide voice over IP (VoIP) and other real-time services. The quality of provided real-time services depends on quality parameters of the network (QoS). One of the leading QoS parameters is the survivability of network itself. The survivability parameter(More)
Education of IT technology experts is not limited to providing theoretical knowledge, rather, it should also facilitate obtaining practical hands-on experience. It is advantageous to provide these practical experience opportunities with the help of supporting tools available not only during main classroom exercises but also through other voluntary(More)
The interest in integrating real-time and realtime multimedia communication features into IP networks and its applications, the web including, started a development effort, which brings several new communication technologies. These technologies are influencing many aspects of our lives now, education not excluding. The Session Initiation Protocol (SIP) and(More)
The article presents solutions of two ESF projects carried out at the University of Žilina and the implementation of their conclusions addressed to new approaches in engineering education. The goal of first project was the innovation of education through implementation of information and communication technologies (ICT) in the development of(More)
Cloud computing security is an important problem when deploying its services. Users consider security to be the most important aspect when deciding to utilize a service cloud computing. Architectural views of cloud computing are views of stakeholders that have different roles and thereby responsibilities for implementing security mechanisms. Security(More)
After the failure of a network node or a link, a period of impaired connectivity is experienced until the network reconverges. During this period, specific destinations are not reachable, causing issues specifically with critical and time-sensitive services such as Voice over IP. The process of network reconvergence can last from a few milliseconds to tens(More)