Search Results

1 - 10 of 209 items :

  • "communication networks" x
Clear All

References 1. Hu, J., G. Zhu, X. Du. Electricity Information Acquisition System Application Situation and Development Trend. – Automation of Electric Power Systems, Vol. 28 , 2014, No 2, pp. 131-135. 2. Wang, W., Y. Xu, M. Khanna. A Survey on the Communication Architectures in Smart Grid. – Computer Networks, Vol. 55 , 2011, No 15, pp. 3604-3629. 3. IBM Corporation. Smart Grid Method and Model [R]. Beijing: IBM Corporation, 2010. 4. Lei, Y., J. Li, B. Hou. Power Distribution and Utilization Communication Network for Smart Grid. – Power System Technology, Vol

networks—such as the telegraph communication networks of Japanese pharmacies—to create spatial interactions among remote regions during the industrialization period. The pharmaceutical industry in late 19 th and early 20 th century Japan faced rigid state control and various regulations with respect to health and welfare. This led to plentiful written sources about the behaviours of and relationships among pharmacies. In terms of methodology, this article draws on the contents of The Telegraph Codebook of Pharmacies in Japan , which was compiled in 1901 in Osaka

imagery, it became clear that the web of news agency agents was indeed a news world of its own. To get a better grip of what was actually going on, I turned to Manuel Castells’ theorizing on communication power and used it as a framework for my own theorizing. In our network society, Castells (2009 , 2011) proposes, the communication foundation lies in a global web of horizontal communication networks. According to Castells’ theorizing, media are not holders of power but constitute the communication space in which power is decided. Within this increasingly contested

Advanced Models and Algorithms for Self-Similar IP Network Traffic Simulation and Performance Analysis

The paper examines self-similar (or fractal) properties of real communication network traffic data over a wide range of time scales. These self-similar properties are very different from the properties of traditional models based on Poisson and Markov-modulated Poisson processes. Advanced fractal models of sequentional generators and fixed-length sequence generators, and efficient algorithms that are used to simulate self-similar behavior of IP network traffic data are developed and applied. Numerical examples are provided; and simulation results are obtained and analyzed.

Abstract

Indoor and outdoor radio communication coverage is permanent issues for the emergency services in every country. In earlier times, every local service had its own communication network. Modern digital radio technology however offers a far better quality of communications and offers furthermore interoperability between different agencies. In Belgium, the national authorities imposed a national tetra radio communications network for the emergency agencies, called the ASTRID (All round Semi-cellular Trunked Radio communication with Integrated Dispatching) network (Law, 1998). But the users are becoming increasingly demanding as of the coverage of this network. Consequently, improving the radio coverage has become the biggest issue.

of Mathematics 54, 2 (1951) 286-295. ⇒71 [14] J. R. Norris, Markov chains, Cambridge University Press, 1998. ⇒73 [15] I. A. Shah, S. Jan, I. Khan, S. Qamar, An overview of game theory and its applications in communication networks Int. J. Multidisciplinary Sciences and Engineering 3, 4 (2012) 5-11. ⇒71 [16] Y. Sovik, Impossible bets: an experimental study, University of Oslo working paper, 1999. ⇒72

References Bartoszewicz, A. (2006). Nonlinear flow control strategies for connection-oriented communication networks, IEE Proceedings on Control Theory and Applications (Part D) 153 (1): 21-28. Bartoszewicz, A. and Zuk, J. (2009). Discrete time sliding mode flow controller for multi-source single-bottleneck connection-oriented communication networks, Journal of Vibration and Control 15 (11): 1745-1760. Drazenovic, B. (1969). The invariance conditions in variable structure systems, Automatica 5 (3): 287-295. Edwards, C., Alwi, H. and Tan, C.P. (2012). Sliding

Abstract

Storage and retrieval of space signals require an advanced set of core technologies that can be implemented with a cloud computing paradigm. In this work we propose a cloud computing solution for the distributed space data storage and access in mobile communication networks. The modeling and simulation results show that the proposed solution performs satisfactorily in the space data processing. In the future, experimental verification of the cloud computing model and its implementation are envisaged.

Abstract

Current tendencies in electronics and informatics development going towards Internet of Things (IoT), Big Data or Data Cloud technologies create new possibilities in acquiring and utilizing data. The article presents the concept of modular monitoring of vehicles operating parameters. Presented device registers data from the OBD system and a set of independent, configurable sensor modules. Data from the OBD system is acquired via protocol. CAN Bus with a DLC connector. The signal from sensor modules is transferred via a Bluetooth wireless network. The registered data can be storage on board as CD card memory or alternatively on a typical user interface such as laptop, tablet, cell phone etc. The communication with the user interface is realised with USB. Moving vehicles modular monitoring system presented in the article can be used to attain a fuller representation of the vehicles state in relation to its environment. The base assumption of the device is maximal flexibility in term of sensors versality as well as possibilities of assembly on board. In connection with the concept, a prototype of the device was made and tested with an inertial measurement unit (IMU) module and a pressure sensor. Appliances modules are based on Cortex M4 and M0 processing units. A users interface in LabVIEW and examples of registered signals are showed at the end of the article.

Abstract

Development of IoT is tightly coupled with the use of the wireless communication solutions. Nowadays there are several standard wireless protocols, which are responsible for carrying information. The increase of the communication traffic tends to specialize the kind of used data interchange methods for the sake of demanded size of data packet, frequency of connections, meaning of the data, security and safety of the transmission as well as many others. One of the intensively spreading wireless networks is LoRaWAN. Because of its low energy consumption, long distance range, and high flexibility, it seems to be very effective solution to apply in the field of road traffic. The article presented the base features of LoRaWAN as well as the conception of virtual local traffic system based on the data yield from the board systems of cars. Accessed from OBD information about f. e.g. temporary cars speed or accelerations associated with their current position can be significant factor in creating the real image of the traffic situation.