New technologies introduce more services which will call for significant advances and changes in IP networks. Networks will have to go in the direction of network programmability, virtualization and cloud-based services. In this paper, Quality of Service (QoS) is configured in two different environments: (i) in traditional IP network using QoS policy-maps and (ii) in Software Defined Network. Two scenarios are compared in order to emphasize the benefits of using SDN technology when providing QoS provisioning mechanisms.

Wide GNSS (Global Navigation Satellite System) availability has its advantages, however, in that case the system is exposed to a large number of external influences, from interference with other signals to deliberate blocking and jamming. There is also a huge increase in GNSS user number for both professional and private purposes. The technology of protection and regulation is partly behind the technological development and leaves room for undesired impacts from both natural and artificial causes. Through this paper GNSS errors are described using an android mobile application, "GNSS Analysis Tool", that allows observation of the GNSS signal characteristics.

Software Defined Networking (SDN) is a promising solution because of many advantages over the traditional network. Due to these advantages, SDN can be considered as a tool for energy efficiency in ICT (Information and Communication Technology) networks. In this paper, we have made a comparison between energy consumption in real IP/MPLS (Internet Protocol/Multi-Protocol Label Switching) network and designed SDN network. The results show that a significant reduction of energy consumption is achieved for a scenario with designed SDN solution.

Six Sigma is a version, a philosophy, a strategy and a set of tools for improvement of the quality services and processes. Till now, this method was mostly used in the world of manufacture. Telecommunication is the industry that is based on the service, where the customers are the main focus, and their needs very often seem unpredictable. In this work, a critical review had been given to the application of the Six Sigma methodology in the department of customers support of a telecom company. Through SWOT analysis, given is a review of the opportunities and challenges of this methodology, and also what is necessary to be changed for this methodology to have a purpose and application in one telecommunication company.

Software Defined Networking (SDN) is considered as a promising solution for optimizing network energy consumption. This paper analyzes possible energy savings that could be achieved by turning off underutilized network links. It presents the energy consumption of a real IP/MPLS network and issues that prevent IP/MPLS from being more energy efficient. The paper proposes the SDN as an approach with a global view of the network and easier link management. A small experiment shows how easy it is for SDN to monitor and shut down unneeded links. This could enable a significant energy saving when using an SDN solution.

New technologies introduce more services which will call for significant advances and changes in Multiprotocol Label Switching (MPLS) networks. Networks will have to go in the direction of network programmability, virtualization and cloud-based services. In this paper, we examined Software Defined Wide Area Network solution, its architecture and benefits of use. In order to analyze benefits of using SD-WAN two scenarios are compared: (i) Policy-based routing on WAN links in classical IP/MPLS network, and (ii) Using SDN controller to manage traffic on WAN links. Aim in both scenarios is to use the most optimal path for specific network.

Aim of this paper is to explore latency in reconvergence after link failure when using BGP-LS/PCEP as southbound protocols in IP/MPLS network with centralized controller. Controller in network is PCE element in charge of Traffic Engineering management. Scenario in this paper describes an IP/MPLS network with four routers, fours links and four tunnels passing through multiple links. In case of a link failure, affected tunnels must be rerouted to alternative links evenly distributing traffic across the links. Therefore, it is necessary to have a central controller that will have a complete knowledge of the network in order to evenly and efficiently redistribute traffic. Our IP/MPLS network contains multi-vendor devices and do not support OpenFlow protocol hence as a southbound protocols standardized BGP-LS and PCEP are used. BGP in general is designed as a very slow protocol. Additional, BGP-LS has to wait for the internal routing protocol on the routers to update the Traffic Engineering Database before the BGP-LS signals change event to its peers. Therefore, we will explore some possibilities of reducing the latency in reconvergence after link failure.

Routing process should encompass finding the best route through the network according to different criteria, with respect to the principle of load balancing, dynamic adaptation to current network conditions, special treatment of traffic based on QoS levels, as well as minimum energy consumption through energy-aware routing. The emergence of the IoT paradigm, 5G networks, increased number of real-time and mobile applications, as well as the increasingly complex requirements in terms of QoS, have put a grave task ahead of the researchers and the industry. Adaptive and efficient management of current network and traffic, and basis for making the networks resistant and ready for the inevitable changes in the foreseeable future, must be ensured. The idea of software-defined networks has offered a new architecture that seeks to overcome the disadvantages of classical network architectures. This approach has enabled direct programmability of the network, faster and simpler introduction of innovations, greater granularity of routing criteria, implementation of consistent and comprehensive policies, real-time response to changes, etc. This paper is a state-of-the-art overview of SDN traffic routing benefits in different network environments, as well as open issues and challenges to be addressed in future research.

This paper presents a strategy and action plan was implemented in the Federation of Bosnia and Herzegovina within the Ministry of Interior within 5 years. Given are the steps to achieve the strategic objectives.