In this paper we propose an improved adaptive media access (MAC) layer routing algorithm for the broadband power line communication (BPLC) access network founded on the fixed basic approach routing algorithm, which is integrated within the IEEE P1901 standard. The proposed adaptive algorithm incorporates a new dynamically scaled threshold for the selection of the next hop station based on the information from the physical layer. Furthermore, the procedures for the route and the time allocation modifications during the connection setup and later adjustments are developed. Simulation of the new adaptive and existing fixed routing algorithm is performed on the model of a realistic BPLC network using the OMNeT++-based BPLC cross-layer simulator BPlcSim. The simulation results showed that the adaptive routing algorithm outperforms the fixed routing in all aspects, since each station can perform routing functions and make the selection of the most reliable next hop station.

In this paper application of Hilbert-Huang transform (HHT) to electroencephalogram (EEG) signals analysis is presented, in order to simplify diagnosis of epilepsy. HHT consists of empirical mode decomposition (EMD) and Hilbert spectral analysis. Hilbert marginal spectrum represents a contribution of total amplitude (or energy) over various frequency values. This approach is used for analyzing 200 EEG signals, where half of all signals are from healthy subjects and the other half are signals of subjects with epileptic syndrome without seizure. It is showed that this method provides clear distinctions in visualisation of EEG signals of healthy and ill subjects, so that it can efficiently identificate epilepsy syndrome. Further, this approach can be a foundation for development of simple automated EEG signal classifiers in the aspect of recognition subjects with epilepsy syndrome and find its place in standard clinical practice. Keywords : EEG, epilepsy, Hilbert Huang transform, Hilbert marginal spectrum

This paper aims to analyze communication characteristics of the high current low-voltage (LV) busbar systems in 1-50 MHz frequency range due to the fact that busbar as an integrated part of the overall Power Line Communications (PLC) channel, it is necessary to investigate its communication characteristics. Firstly, the modeling of a compact structure LV busbar system is described. Then, this system carried out by an Electromagnetic (EM) analysis simulation tool based on methods of moments (MoM). Channel characteristics are obtained based on scattering parameters (S parameters) for the unit length (3 m) busbars. Characteristic impedances (Zc) are obtained approximately 22 Ω, 18 Ω, 14 Ω, 11.5 Ω and 9.7 Ω for different busbars that have 1000 A, 1250 A, 1600 A, 2000 A and 2250 A current levels, respectively. On the other hand, the busbar length is changed as 3 m, 6 m, 9m and 12 m. The resonance frequencies for these lengths are calculated 33 MHz, 16 MHz, 11 MHz and 8 MHz, respectively. The results are given both graphical and numerical forms.

The paper provides an overview of the requirements for the communication infrastructure in the smart grid. Communication traffic is classified as the time critical and non-critical and correlated with the power system phenomena. Required values of quality of service parameters are given for particular applications: wide area measurement system, distribution automation and advanced metering infrastructure. Since available standards describing communications in the smart grid define Internet Protocol (IP) and Ethernet as the most appropriate communication protocols for the broad deployment of the smart grid applications, mechanisms for traffic prioritization at the MAC layer are reviewed in the paper.

This paper describes the specific requirements in the design of versatile wireless sensor networks (WSN) and how MAC routing algorithms influence on their performance. Investigation of the impact of the MAC routing algorithms on the battery consumption of the sensor nodes and packet delivery delay is based on the WSN simulation in OMNET++ framework. Simulation results are validated with the actual measurements using Arduino nodes with XBEE modules.

Abstract—This paper describes the specific requirements inthe design of versatile wireless sensor networks (WSN) andhow MAC routing algorithms influence on their performance.Investigation of the impact of the MAC routing algorithms onthe battery consumption of the sensor nodes is based on theWSN simulation in OMNET++ framework. Simulation resultsare validated with the actual measurements using Arduino nodeswith XBEE modules.Keywords—wireless sensor networks, MAC routing, simulationOzetce —Bu calismada,¸ cok yonlu kablosuz algilayici aglarinin˘tasarimi (WSN) ve MAC yonlendirme algoritmalarinin basarima¸etkisini incelemeyi amaclamaktadir. Algilayici dugumlerinin˘batarya tuketiminde MAC yonlendirme algoritmalarinin etki-lerinin arastirilmasi¸ Algilayici dugumlerin batarya tuketimi MAC˘yonlendirme algoritmalari etkilerinin arastirilmasi¸ WSN benze-timi OMNeT + + ile gerceklenmektedir. Benzetimden elde edilensonuclar XBEE modulleri ile Arduino du˘gumleri kullanarakgercek olcumler ile dogrulanmaktadir.˘Anahtar Kelimeler—dokuman bicimi, stil, anahtar kelimeler.

This paper describes the PLC broadband channel application for home automation in Turkey. Firstly, the necessity of information and communication technologies (ICT) for smart grid is discussed and channel models for LV power lines-especially transmission line based models are explained. For application step, a typical house which has five rooms is selected. Then, the potential loads are located. In addition, all cable types and cable lengths are selected according to the real home wiring application in Turkey. Then, the PLC channel behavior is observed with the help of FTW simulator in fixed and random mode.

This paper presents the discrete-event simulator of the low-voltage broadband power line communication (BPLC) access network in accordance with the IEEE P1901 standard. The proposed simulator enables the cross-layer simulation of the physical (PHY) and medium access control (MAC) layer. The performance of the digital communication techniques at the physical layer and the characteristics of the shared medium are integrated at the MAC layer through the probability of the bit error. The proposed simulator was applied in order to estimate the throughput in the simple BPLC network. For the selected set of parameters at the MAC and PHY layer in the test network, the simulator recorded average download throughput of 900kbps, registration time of 36ms and packet delivery ratio of for 0.98 between each station and the HE. DOI: http://dx.doi.org/10.5755/j01.eee.19.5.1440

Abstract Integration of mobile backhaul and broadband fixed access networks is a practical and inexpensive solution. This study discusses integration in urban metropolitan areas when a broadband fixed access network is based on gigabit-capable passive optical network and mobile backhaul is intended for the 3G global system for mobile communication networks. Bandwidth and quality of recovery clock are considered as two main parameters for successful integration. Two clock recovery approaches are described, and their performances are measured on the real gigabit-capable passive optical network system.

For supporters of fiber-optic technologies

In this paper we analyze the requirements for the complex information system used to support a modern global university. We outline the architecture for this system based on the emerging cloud computing platforms and present an example of managing a university course by incorporating different Google cloud services within the Google Sites.

The paper analyzes the performance of the wireless sensor network (WSN) from the standpoint of routing algorithm related tos battery-discharge process. Using an experimental WSN implemented with Arduino Uno and XBee modules, measurements are made, of the packet delay and battery-discharge rate. Measurement results are compared with the simulation results obtained in the OMNeT++ simulation environment. The paper provides a short overview of difficulties and challenges commonly encountered in WSN design. The measurement results show that Arduino in its native form is not suitable for the WSN processing unit because its high current value during the sleep mode.

Usage of Gigabit-capable passive optical network (GPON) as mobile backhaul is described. Two clock recovery approaches for GPON-based mobile backhaul architecture for 2G / 3G GSM (Global System for Mobile communication) network are described and their performances are compared. Measurement of quality of recovered clock on real GPON is performed and discussed.

This roundtable proposal deals with the challenges lecturers face when including new course material into an existing module as a result of new developments in the technology or knowledge covered by the module. While the new technologies are gaining ever more grounds, the “old” technology or knowledge still remains important for the students to master, as much of the existing products and research activities still will be based on this former knowledge. The challenge lies in keeping the total amount of new learning material relatively constant, implying that some of the existing materials have to be removed from the module. What new learning material can be brought into the module, and which parts must be removed from the module? With references to Analogue Electronics and Control theory modules, we search for strategies, and inclusion and exclusion methods that should be utilized to ensure both the quality of the module itself, and the competitiveness of the students completing the module. The ultimate goal is to develop an “objective” approach for developing best practice when introducing new learning material.