Aydan M.Haka

• PhD
• Professor (Assistant) at Technical University of Varna

Blockchain technologies have the potential to fundamentally change logistics and supply chain management. By leveraging the capabilities of blockchain technology, businesses can increase efficiency, reduce costs, and improve security and trust in operations. However, there are still difficulties to overcome in terms of uptake and implementation. Th...

Many goods require certain conditions for their storage, such as temperature, humidity and arrangement, which are strictly specific. These include dangerous goods, medicines and goods with a limited shelf life. Servicing them in warehouses is an important task in order to be able to establish and monitor the flow of their transportation from the ma...

The Internet of Things (IoT) idea now entails a dispersed collection of different sensor networks with several functions that collect data, which is then analysed and used in applications such as smart cities. These networks are capable of transmitting massive volumes of data in a relatively efficient, yet unsecure wireless environment. These appli...

The growth of Internet of Things in recent years has led to the use and dissemination of various technologies to achieve the concept of connected life. Some of the most common technologies that enable the implementation of the IoT concept are ZigBee, 6LoWPAN, and BLE. The main obstacle to the realization of this is the provision of quality service....

The growing interest in Internet of Things technologies in modern life requires their active research. This can be done most easily by using a simulation product for the technology in consideration. This article presents the most famous existing simulation products of Bluetooth Low Energy technology, as well as the one developed by the authors, and...

Along with the development of modern communication technologies such as 4G and 5G, Internet of Thing (IoT) technologies are being implemented more widely. The need for remote monitoring of environmental and patient parameters can be realised by means that represent IoT technologies. The localisation of mobile sensor nodes for low power IoT can be r...

The constant expansion of Internet consumption increases the communication traffic on the network both locally and globally. To meet the needs of such consumption, technologies such as 4G, 5G and the Internet of Things (IoT) are increasingly being developed. Remote monitoring of environmental parameters or the condition of patients in real time can...

Ръководството за лабораторни упражнения е предназначено за студентите от специалност “Компютърни мрежи и комуникации” и има за цел да ги запознае със съвременни безжични технологии. Очаква се студентите да имат базови знания по компютърни мрежи за адресиране на устройства и принцип на работа на маршрутизиращи протоколи. Упражненията са структурира...

LTE is widely used 4G technology, which provides simultaneously voice, data and video (with different priority) on networks. The major concept of the LTE network uses the QoS bearers technique that provides high performance in packet delivery based on prioritization of the traffic. In this paper is proposed a simulation framework for LTE technology...

The LTE technology provides simultaneously voice, data and video with different priority on networks. LTE cellular network provides uninterrupted delivery of these services while on the move, and this is possible through the Handover procedure. In this paper is proposed a simulation framework for realization the Handover procedure in LTE technology...

The LTE Technology provides simultaneously voice, data and video with different priority on networks. LTE applies the QoS bearers technique that provides high performance in packet delivery based on prioritization of the traffic. In this paper is proposed a simulation framework for LTE technology, which realized a priority based algorithm for LTE S...

The LTE Technology provides simultaneously voice, data and video with different priority on networks. LTE applies the QoS bearers technique that provides high performance in packet delivery based on prioritization of the traffic. In this paper is proposed a simulation framework for LTE technology, which realized a priority based algorithm for LTE S...

This paper consider examines the development trends of cellular networks. In recent years, cellular networks around the world have grown to 5G, while 4G technologies are still up to date in Bulgaria. The paper presents a comparative features for the development of cellular networks in Europe, North America and Bulgaria.

In this paper is proposed a simulation model for analysis of the efficiency of allocating bandwidth in passive optical networks. An algorithm is presented for resource allocation in two stages for maximum utilization of bandwidth using orthogonal frequency multiplexing in the passive optical networks (OFDM-PON). During the first stage time interval...