Dragan Peraković

IoT infrastructure as a basis for new information services in the ITS environment

Internet of Things (IoT) as a concept can be considered as a continuation of the Internet evolution. IoT can serve as an infrastructure foundation for the development and delivery of new services in the transport system, based on the principle of ITS. The purpose of this paper is to show the increasing role of the IoT concept, its future use in the development of ITS information services and defines the guidelines for further applications.

Bandwidth optimization in SLA negotiation process

In this paper we propose an efficient resource management technique for MPLS-based DiffServ networks. The service provider (SP) can predict sufficient link bandwidth resources for traffic caused by contracting of SLAs (service level agreement). It could be an important part of admission control in the SLA negotiation process (SLA-creation). Such bandwidth expansion and bandwidth sharing technique can be an important part of TEQUILA architecture based on autonomic computing. The problem is seen as an expansion problem of link capacities (bandwidth) that can be done dynamically from NP (network provider). Also, it helps to avoid the creation of bottleneck links on the path and maintains high network resource utilization efficiency

Artificial neuron network implementation in detection and classification of DDoS traffic

Detection of DDoS (Distributed Denial of Service) traffic is of great importance for the availability protection of services and other information and communication resources. The research presented in this paper shows the application of artificial neural networks in the development of detection and classification model for three types of DDoS attacks and legitimate network traffic. Simulation results of developed model showed accuracy of 95.6% in classification of pre-defined classes of traffic.

Availability Protection of IoT Concept Based Telematics System in Transport

This paper will analyze the security disadvantages of the IoT concept based telematics system in the transport environment in terms of availability and the possibility of denial of access to information resources. Analysis will be conducted on Electronic Toll Collection (ETC) system implemented in Republic of Croatia. Based on this analysis, protection mechanisms that can be implemented in order to maintain agreed quality of service level within the telematics systems based on the IoT concept such as ETC system will be proposed.

Hedonic modeling to explore the relationship of cell phone plan price and quality in Croatia

The study explores the use of hedonic indices for cell phone plans.Cell phone plan price and quality are studied in Croatia during 2009-2013.Hedonic price and quality indices are calculated for the first time in Croatia.Indices show slow fall in cell phone plan prices and rise in technological quality.Results are consistent with trends in European telecommunications market. Since 2009, the Croatian mobile market has been subject to various negative influences, including the economic crisis and a 6% telecommunication tax on mobile operator gross revenues. This paper took advantage of this tumultuous period to explore the effects of quality change on monthly price of cell phone plans in Croatia during 2009-2013. We used hedonic modeling to calculate hedonic price and quality indices over the period. The results indicate that cell phone plan prices slowly fell rather than rose, and that plan quality increased. The results are consistent with trends in other European countries with similar market conditions.

Adaptive technologies for the blind and visual impaired persons in the traffic network

AbstractThe information about the environment and the precise guidance of visually impaired people is the basis for their safe movement of the traffic network. Therefore, the information and communication services should be adapted to this group of users. The services based on the advanced information and communication technologies provide the visually impaired persons with information about the environment while moving along the traffic network. This paper analyses the currently available information systems of users when moving traffic network, and the currently most services based on new ICT (Information and Communications Technology). The analysis was carried on a representative sample of the City of Zagreb (Croatia) in involving all interest groups of visually impaired people. Based on defined user requirements is proposed a new services based on NFC (Near Field Communication) and RTLS (Real-Time Locating Systems). Testing and analysing the efficiency of single information and communication technolog...

Possibilities of Applying ICT to Improve Safe Movement of Blind and Visually Impaired Persons

Today’s level of the development of information and communication technologies enables the implementation of assistive technologies that can contribute to improved mobility of the persons with impaired vision (users that move along the traffic network). The user in this research has the role of a pedestrian moving along the traffic network, using information and communication technology (ICT) solutions and services for the purpose of information about the surrounding and navigation. In order to achieve greater information and safe movement of the user in the environment, one has to identify and define the relevant parameters necessary to define the user’s requirements, as the basic precondition for the design of new information and communication services. The analysis of the most used application solutions for mobile terminal devices showed the failure in providing precise information to the user, designing of functionality, structure of information and education of the users about the new solutions and services. The downsides of the current applications have served as the basis in defining the recommendations for the development of future applications, with the aim of increasing the user safety. Proper structure of information allows the user a faster and easier search of relevant information and information methods while moving along the traffic network elements. Therefore, the recommendations in designing future solutions and services based on possible technologies of short coverage area (RFID, NFC, Bluetooth, WiFi, RTLS) have been defined. These technologies allow communication connectivity of the users, other traffic entities and the entire traffic surrounding into a unique whole by using the principle of Internet of Things (IoT).

Data Traffic Offload from Mobile to Wi-Fi Networks: Behavioural Patterns of Smartphone Users

This paper presents a model for defining the behavioural patterns of smartphone users when offloading data from mobile to Wi-Fi networks. The model was generated through analysis of individual characteristics of 298 smartphone users, based on data collected via online survey as well as the amount of data offloaded from mobile to Wi-Fi networks as measured by an application integrated into the smartphone. Users were segmented into categories based on data volume offloaded from mobile to Wi-Fi networks, and numerous user characteristics were explored to develop a model capable of predicting the probability that a user with given characteristics will fall into a given category of data offloading. This model may prove useful for analysing smartphone user behaviour when offloading data.

Information and Communication Technologies Within Industry 4.0 Concept

Internet of Things provides connectivity and interoperability between transport entities, transported entities and product entities in Industry 4.0 concept. The market requirements are changing on daily basis and for the business processes of manufacturing organizations to be successful, it is necessary to link all the supply chain stakeholders and ensure their real-time informing, by forming an ecosystem for connecting stakeholders of Industry 4.0 concept. By implementing contemporary information and communication technologies in the production line it is possible to ensure the flexibility of production and adaptation of product entities to end user requirements. The problem of providing real-time information to all participants in supply chain has been identified by analyzing the traditional supply chain in the manufacturing industry. Based on the analysis of information and communication technologies in Industry 4.0 concept, the aim of this research is to propose optimal information and communication technologies for connecting stakeholders of logistic production chain. This extends the opportunity for all logistic production chain participants to inspect the stage of product entities from the stage of the development of product materials to the delivery stage of the product to the end users.

Availability Factors in Delivery of Information and Communication Resources to Traffic System Users

Availability, as one of the basic elements of IC (information and communication) system security, plays an important role in its work and in operation of services that are provided through it. IC system and related services (IC resources) must be available to end users when needed. Availability of IC resources is especially evident in IC systems implemented in a traffic environment. The emergence of new concepts such as Internet of Things or Cloud Computing and technologies such as 5G resulting in an increasing processes automatization in the traffic system. In doing so, the unavailability of individual IC resource can result in negative user experience in usage of certain classes of services, but can also represent a potentially large security risk and compromised user safety. In such environment required level of IC resources availability are often extremely high so it is essential to know which factors affect it. This research aims to identify these factors, and the results of this research will provide guidelines by which factors needs to be managed to achieve the required level of IC service availability.