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Nowadays, LTE is widely used mobile communication technology. The development of mobile communications has never been faster. The main goal of mobile communications is to increase the data throughput and to ensure the best possible quality of communication between users, regardless of environment in which they are situated and type of data they share. In this paper, performance evaluation of different...
Software Defined Radio systems are predicted to be radio access networks of next generation in all kind of wireless communications systems. Their use is not limited to radio front end that is first chosen for system operation. They can be upgraded by time as system needs changes or evolves which gives them radio front end flexibility never seen before in radio systems. Smart home environments such...
In this work we deal with the Achilles' heel of wireless sensor networks - energy efficient operation. By a combined MAC/physical layer attack on the issues contributing to energy overhead, we demonstrate the possibility of reducing the overall power consumption in a relatively straight-forward way without severe alteration of common communication protocols. Results of simulations of networks using...
Energy efficiency in these days is as it should be, a part of every scientific research, especially in electronic communications in which it holds a notably significant role. When it comes to electronic communications, what matters is that the network is efficient not only for environmental reasons but for economical, as well. In telecommunication network, control of all the network aspects is crucial,...
In the last few years, there has been intensive research in the field of human motion and environment energy harvesting. That kind of energy harvesting used for power supply self-regulation in eWALL system (e WALL for Active Long Living) would contribute to increased energy efficiency of the system. The paper will represent possible methods and ways of energy harvesting in eWALL system. Statistical...
By doing business the old way, retail chains don't use all the potential of developed technologies in order to increase their efficiency. Cash register lines optimization system uses RFID (Radio Frequency Identification) technology to follow the number of shopping carts and baskets in front of cash register. Developed system consists of RFID reader and passive RFID tags with assigned ID. System works...
The main aim of this paper is making connections between modern technologies, architecture and art, i.e. how to increase the interest for cultural sights and facilitate the retrieval of desirable information with use of modern technologies. Smart phones dominate worldwide mobile phone market and they are mainly used for display and information retrieval. Furthermore, not only that smartphones offer...
With the average human life span increasing significantly due to numerous achievements in medical science, the need to modify the residential environments of individuals has grown accordingly. Some of these changes involve building fast and responsive systems designed to continuously monitor the activities within the space they are situated in. Such sensors may vary from simple light switches that...
The power grid is aging, congested and faces new challenges and stresses that put at risk its ability to reliably deliver power to an economy that is increasingly dependent on electricity. A growing recognition of the need to modernize the grid to meet tomorrow's challenges has found articulation in the vision of a smart grid. The essence of this vision is a fully-automated power delivery network...
In today's corporate world, many small businesses, as well as big commercial companies, manage small or large number of vehicles on which their business depends on. One of the main factors in leading an efficient business proved to be commanding a fleet of vehicles in the best and most efficient way. This basically means providing the route, which takes the shortest trip time from point A to point...
The Self-Organizing Network (SON), introduced as part of the 3GPP Long-Term Evolution (LTE) is a key driver for improving Operation and Maintenance (OAM) of the mobile networks. The goal of SON is to simplify the network management by auto-configuration and auto-optimization. Optimization of coverage and capacity is one of the high-level SON use cases. This paper provides some background of SON principles...
Ubiquitous electromagnetic fields in the human environment ask for definition of interaction mechanisms to understand hazards from exposure of human body. Even though industrial and medical applications of electromagnetic fields are present in the human society more than hundred years, the interaction mechanisms of electromagnetic fields and human being are still subject of research, and health and...
Harmonization of regulation is always a time and energy consuming process. This is especially the case if the scientific evidence differs very much. This is the reason why World Health Organization developed the standard data base, as the first step for enabling harmonization process.
The objective of the work was to make a simple wireless one channel limited (3-lead) home electrocardiogram (ECG) transmission system for home and ambulance use. The wireless ECG monitoring system significantly improves the quality of life of the cardiac patients, reflected primarily in the permanent monitoring. In case of an accident, an immediate alarm is being transmitted to the physician. A long-term...
Advanced speech call items (ASCI) are a special set of speech call services designed on top of GSM standard to fulfill the requirements of International Union of Railways (in French Union Internationale des Chemins de fer - UIC). In collaboration with ETSI, railways' working-group EIRENE formed a set of functional and system requirement specifications for mobile networks which would fulfill the needs...
This paper discusses dosimetry of electromagnetic fields designed for future Body Area Networks (BAN). Electromagnetic dosimetry, which quantifies the interaction of electromagnetic fields with biological material, is primarily used for evaluation of human exposures due to wireless devices generating electromagnetic fields. The calculation of total external electromagnetic fields enables determination...
SEMCAD is an electromagnetic simulation platform based on the finite difference time domain method, FDTD, with an especial feature of calculating specific absorption rate, SAR. SAR is a value corresponding to the power absorbed by the human tissue while exposed to microwave radiation. For antenna designers and cellular phone companies, this value is limited and consequently it is an important parameter...
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