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The significant growth in the number of access points deployed in WLAN stimulates research efforts to focus on finding solutions to reduce the power consumed by their components. One promising approach is to put the access points (or at least its radio interface) into sleep mode when no activity is detected on the channel. In this paper we designed and implemented a measurement platform which can...
Sniffer channel assignment (SCA) is a fundamental building block for wireless data capture, which is essential for traffic monitoring and network forensics. Most of the existing SCA approaches for cognitive radio networks (CRNs) adopt optimization-based methods and rely on the prior knowledge of the secondary user (SU) activities. To relax this constraint, learning-based methods have been recently...
The need of monitoring the water level of troughs is increasing. This is parallel with the growing of Wireless Sensor Network and Internet of Thing. By combining both approach, cattlemen can monitoring their troughs ubiquitous using their own personal device. This paper develop such system by using LoRa™ as the media between sensor hub and nodes, while Raspberry Pi is used as the gateway to push data...
Planning and management of energy are among the most important topics nowadays due to the fact that the existing power plants and systems fail to satisfy the energy demand and keep up with the daily developing technologies. To maintain the energy need of the existing systems, researchers are aiming to improve usage and savings of available resources and systems. For example, power metering system...
This paper presents our developed energy efficient software defined wireless access point with an OpenFlow framework. The developed access point is adaptively powered on/off according to users’ traffic conditions by the OpenFlow controller via the OpenFlow protocol. The OpenvSwitch is installed on a commercially available board in the access point to communicate with the OpenFlow controller. Our Experiments...
Single Frequency Network(SFN) transmission mode in Long Term Evolution(LTE) can be used to deliver Multimedia Broadcast Multicast Service(MBMS) business in the form of sharing wireless resources. It has negative effect on the spectral efficiency while the allocation of resources in SFN mode refers to the worst signal user. This paper introduces a novel transmission mode named Mixture Mode(MIX) for...
An interconnected wireless networked system consists of numerous coupled subsystems that need to exchange information over wireless communication channels. The use of these wireless networks induces a great deal of stochastic uncertainty that often results from deep fades, where a severe drop in the quality of communication link occurs. Such uncertainty negatively impacts the system's performance...
Software Defined Networking (SDN) and OpenFlow represent the most commonly deployed approaches of the so called Programmable Networks. SDN is an emerging network architecture, which performs the subdivision of control plane and data plane and allows greater speed, greater scalability, and greater ductility in terms of routing and forwarding. OpenFlow, instead, is an SDN component that characterizes...
Sensor networks usually complete several data processing tasks that include the acquiring sensor samples, preparing messages containing data, and sending/receiving radio messages. In this paper, we consider the impact of the sensing subsystem, intended for area monitoring applications, and its effect on the power consumption of sensor networks. We describe a sensing subsystem with implemented power...
In previous work, we presented the development of a piezoelectric switch for applications in ultra-low power wireless sensor nodes for monitoring the health condition of chickens. Using Pb(Zr0.52, Ti0.48)O3 (PZT) thin films, we have developed "S"-shaped PZT cantilevers with proof masses. Since the resonant frequency of the PZT devices is around 24 Hz, we utilized superharmonic resonance...
This article builds a smart monitoring and control system for the household electric power usage. The system presents the complete picture of current usage and projected cost of home appliance in a graphical display. It uses wireless communication to monitor energy saving and safety use. This can provide the elder a safe and energy-saving environment and service for daily life. The system integrates...
Wireless power transfer (WPT) based on magnetic resonant coupling is a novel technology by which non-radiative and mid-range power transfer can be realized via the near field. WPT inevitably leads to a small-scale regional network with a certain amount of transmitters, receivers and repeaters. There is a great lack of related analysis approaches because of its high-frequency and near-field features,...
Basing on the Smart Peninsula pilot project the paper presents the issue of comprehensive automation and monitoring of medium voltage (MV) grid as a key element of the Smart Grid idea. The existing condition of MV grid control and monitoring is discussed, and the concept of a solution which will provide the possibility of remote automatic grid reconfiguration and ensure full grid observability from...
Radio irregularity phenomenon is often considered as a shortcoming of wireless networks. In this paper we present the method of using radio irregularity as an efficient human presence detection sensor which increases user awareness in smart homes. The idea is based on monitoring the received signal strength indicator (RSSI) between stationary wireless (2.4 GHz — Zigbee) power outlets. When a human...
The article is based on wireless frequency-hopping communication technology, high-voltage bus switch contacts and temperature monitoring, combined with the main electric connection, the location of the measured points, name and temperature values are displayed on a computer screen at the monitoring center. ECS in the introduction of the loop current value, calculated temperature rise, given the ambient...
The scour is one of the major causes for bridge failure. Scour failure occurs suddenly without prior warning or sign of distress to the bridge. However, there are many challenges to monitor the processes of hydraulic scour, such as measuring equipments are essentially critical, especially during the floods. This paper presents an in-situ scour monitoring system by using the novel mobile wireless technology...
A self-powered wireless ultrasonic flow sensor system has been designed and developed from a system level approach in this paper. By using small-sized hydroelectric generator as the source of power for commercial low power microcontrollers, energy harvesting circuitry, and GPRS transmitters, the sensor is capable of detecting water flow in water pipelines network. A major feature of this sensor system...
To access the batteries information in the process of charge and discharge in time, the article designed a monitoring system for the condition of storage batteries based on ZigBee. This approach used the chip of CC2430, which was integrated of AD converter, 8-bit strengthened MCU and wireless RF unit. The chip of CC2430 and the external circuits were made up the node of the star network. The temperature,...
The open and standards-based integrated communications is the most basic of technologies in the all key technology areas of smart distribution grid. It is not only the basic of other key technologies, but also the key supporting technology of smart distribution grid. According to the research on the development status of integrated communications at home and abroad and combined with development requirements...
In this paper, the embedded systems and ZigBee technology are used to build a miner's lamp monitoring and control system. This miner's lamp monitoring and control system is composed of a central control station and a number of miner's lamp charging nodes. The central control station of miner's lamp monitoring and control system is constructed with the embedded microcontrollers S3C2410A based on ARM9,...
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