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检索条件"任意字段=6th IEEE International Conference on Distributed Computing in Sensor Systems"

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Generative Dynamic Deployment of Multiple Components in Wireless sensor Networks

Generative Dynamic Deployment of Multiple Components in Wire...

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6th international conference on Wireless On-Demand Network systems and Services

作者： Suenaga, Shunichiro Yoshioka, Nobukazu Honiden, Shinichi Nihon Unisys Ltd Grad Univ Adv Studies Kanagawa Japan Grad Univ Adv Studies Natl Inst Informat Tokyo Japan Univ Tokyo Natl Inst Informat Tokyo Japan

ISBN: (纸本)9781424433742

Wireless sensor networks (WSN) consist of spatially distributed nodes that monitor physical conditions. In the past, most WSNs have been designed with a single specific application in mind. Recent developments however are expanding the applicability of WSNs and are increasing the demand for deploying multiple applications simultaneously. To host multiple applications in a single WSN, current solutions provide mechanisms for components to be dynamically deployed to nodes. However, two issues make the present form of dynamic deployment impractical for applications involving distributed collaboration and the redeployment of multiple distributed components. For one, existing works lack a suitable architecture for cooperation and interaction between components in WSNs. Another problematic aspect is the insufficiency of current methods in efficiently deploying multiple components throughout the network. To address these issues, we propose an architecture based on multiple components that have specific responsibilities in regard to deployment and a generative approach for dynamic deployment of such components.

关键词： Network architecture

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A wireless sensor system for global self-localization and collaborative actioning

A wireless sensor system for global self-localization and co...

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6th international conference on Networked Sensing systems, INSS2009

作者： Haverinen, Janne Martínez, David Muñoz Pirttikangas, Susanna University of Oulu Department of Electrical and Information Engineering Oulu Finland

ISBN: (纸本)9781424463145

Recent progress in MEMS technology and miniaturization together with low power radio solutions have enabled new concepts of wireless sensor devices and applications. In this article, we present a wireless sensor system developed for conducting experiments in global self-localization, collaborative actioning, and gestural control. the sensor system consists of multiple wireless nodes, based on the nRF24L01 radio transceiver, and a base station. Each sensor node includes 3-axis accelerometer, atmospheric pressure sensor, photo detector, and a microphone. For global self-localization experiments 3-axis magnetometer was added to a sensor node by using the expansion bus of the node. Depending on the application the sensor data is stored into the flash memory inside the base station or sent directly to a host computer through the radio link. the selected applications and preliminary results are also presented. ©2009 ieee.

关键词： sensor nodes

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MEDAL: A compact event description and analysis language for wireless sensor networks

MEDAL: A compact event description and analysis language for...

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6th international conference on Networked Sensing systems, INSS2009

作者： Kapitanova, Krasimira Son, Sang H. University of Virginia Virginia United States

ISBN: (纸本)9781424463145

Event detection plays an important role in wireless sensor network (WSN) applications such as battlefield surveillance and habitat monitoring. However, effective approaches for specifying events in a sensor network remain a challenge. In this paper we present MEDAL, a formal event description language. MEDAL is a modified Petri net which provides a more compact formal language than its predecessor SNEDL. As a system analysis tool, MEDAL can capture the structural, spatial, and temporal properties of a complex event detection system, which can be used to assist system designers in identifying inconsistencies and potential problems. MEDAL can also perform case-specific analyses that can make the debugging phase easier. We present a case study as an example illustrating the features and effectiveness of MEDAL. We also describe an approach for simultaneous detection of multiple events in a single WSN. ©2009 ieee.

关键词： Wireless sensor networks

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Design and implementation of non-autonomous mobile wireless sensor for debris flow monitoring

Design and implementation of non-autonomous mobile wireless ...

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2009 ieee 6th international conference on Mobile Adhoc and sensor systems, MASS '09

作者： Lee, Huang-Chen Cho, Chuan-Yu King, Chung-Ta Fang, Yao-Min Lee, Bing-Jean Department of Computer Science National Tsing Hua University Taiwan Geographic Information Systems Research Center Feng Chia University Taiwan

ISBN: (纸本)9781424451135

this demo presents a mobile wireless sensor system for debris flow monitoring. the objective of this system is to realize long-term and effective debris flow surveillance using low cost wireless sensors. In the system, a set of robust wireless sensors are designed to deploy on riverbed and cooperatively observe the moving debris flows. Our mobile sensors are intended to be carried along by the debris flow. As the sensors move along, they are able to measure the internal parameters, such as vibration frequency, amplitude, moving direction and velocity, of the debris flow. By utilizing the proposed energy-saving mechanism on the WSN platform, the mobile sensors can continuously operate up to six months with merely two alkaline D cell batteries. the proposed system provides the abilities to collect high-fidelity data for civil engineering applications to analyze and determine the occurrence of debris flows, as well as estimate the damage.

关键词： Energy conservation

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Decoupled Power Control for an Inverter Based Low Voltage Microgrid in Autonomous Operation

Decoupled Power Control for an Inverter Based Low Voltage Mi...

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6th ieee international Power Electronics and Motion Control conference

作者： Li, Yan Li, Yun Wei Univ Alberta Dept Elect & Comp Engn Edmonton AB T6G 2M7 Canada

ISBN: (纸本)9781424435562

With the increasing concerns for the traditional energy shortage and environment issues, distributed generation (DG) systems based on renewable energy sources (RES) have experienced a fast development in recent years. With more DC units being integrated into the power system, a more recent concept, called microgrid, is developed by grouping a cluster of loads and parallel DC units in a local area. this paper addresses the issue of real and reactive power control for DC units in a low voltage (LV) microgrid during the autonomous islanding operation. the traditional method for power control in parallel DC systems is the frequency and voltage magnitude droop method, which is based on the assumption of a mainly inductive line impedance, and is subject to power control couplings when implemented in a IN microgrid, where the line resistance to reactance ratio (R/X) is high. It is also revealed in this paper that the traditional droop control can lead to stability concerns in a LV microgrid. To achieve accurate and decoupled real and reactive power control and at the same time, to improve the system stability, a virtual frequency-voltage frame control is proposed, where the original voltage and frequency frame is transformed to a virtual frame to realize a completely decoupled relationship between real and reactive power. Details of frame transformation control and small signal stability analysis are presented. Both simulation and experimental results are provided in this paper.

关键词： Power control

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Private Cluster Head Election in Wireless sensor Networks

Private Cluster Head Election in Wireless Sensor Networks

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6th international conference on Mobile Adhoc and sensor systems

作者： Buttyan, Levente Holczer, Tamas Budapest Univ Technol & Econ Lab Cryptog & Syst Secur CrySyS Budapest Hungary

ISBN: (纸本)9781424451142

Clustering is a useful mechanism in wireless sensor networks that helps to cope with scalability problems and, if combined with in-network data aggregation, may increase the energy efficiency of the network. At the same time, by assigning a special role to the cluster head nodes, clustering makes the network more vulnerable to attacks. In particular, disabling a cluster head by physical destruction or jamming may render the entire cluster inoperable temporarily until the problem is detected and a new cluster head is elected. Hence, the cluster head nodes may be attractive targets of attacks, and one would like to make it difficult for an adversary to identify them. the adversary can try to identify the cluster head nodes in various ways, including the observation of the cluster head election process itself and the analysis of the traffic patterns after the termination of the cluster head election. In this paper we focus on the former problem, which we call the private cluster head election problem. this problem has been neglected so far, and as a consequence, existing cluster head election protocols leak too much information making the identification of the elected cluster head nodes easy even for a passive external observer We propose the first private cluster head election protocol for wireless sensor networks that is designed to hide the identity of the elected cluster head nodes from an adversary that can observe the execution of the protocol.

关键词： Energy efficiency

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Design considerations for monolithic integration of a micro hotplate temperature controller in a MEMS gas sensor

Design considerations for monolithic integration of a micro ...

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2009 6th international conference on Electrical Engineering, computing Science and Automatic Control, CCE 2009

作者： Mendoza-Acevedo, S. Reyes-Barranca, M.A. Flores-Nava, L.M. Ávila-García, A. González-Vidal, J.L. Department of Electrical Engineering CINVESTAV-IPN Mexico D.F. Mexico UAEH Pachuca Hidalgo Mexico

ISBN: (纸本)9781424446896

A control system to regulate the temperature of the micro hotplate in a MEMS gas sensor is presented. the controlelement, called micro hotplate, is comprised of a micro heater and a temperature sensor, both made with polysilicon, located near each other. this material has a Temperature Coefficient of Resistance (TCR) that is the basis for the design of the temperature controller of the gas sensor system. A high temperature between 250 and 400 ° C is needed to produce a chemical reaction between the gas and the sensing film, hence a reliable temperature control for the micro hotplate is desired. thermal insulation of the circuitry from the heating element, having a monolithic sensor system, and low power consumption, are the main specifications for the system. this is obtained by means of a micro pit realized with MEMS micromachining processes. the analysis of the circuit proposed to fulfill these characteristics is presented, for its future integration with a standard CMOS technology. A trade off is established between the sensor structure parameters and the circuit design.

关键词： Gases

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Route in Mobile WSN and Get Self-deployment for Free

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5th ieee international conference on distributed computing in sensor systems

作者： Huguenin, Kevin Kermarrec, Anne-Marie Fleury, Eric ENS Cachan IRISA Cachan France INRIA Rennes Bretagne Atlantique Rennes France ENS Lyon INRIA Lyon Rhones Alpes Lyon France

ISBN: (纸本)9783642020841

We consider a system consisting of a set of mobile sensors. they are disseminated in a region of interest and their mobility is controlled (as opposed to mobility imposed by the entity on which they are embedded). A routing protocol in this context enables any point of the region to be reached starting from any node, regardless of the initial sensor deployment. this operation involves message forwarding and/or sensor motion. In this paper we present GRASP, a GReedy stAteless Routing Protocol for mobile wireless sensor networks (WSN). GRASP is simple and independent from the underlying communication model, but still provides results close to the optimal, with respect to the self-deployment of sensors over a given region. It ensures that (i) routing is always possible in a mobile WSN irrespective of the number of sensors, and (ii) above a given number of sensors in a considered zone the protocol eventually enables the routing to no longer require sensors to move, which yields to self-deployment. With GRASP, sensors autonomously reach a stable full coverage following geometrical patterns. this requires only 1.5 times the optimal number of sensors to cover a region. A theoretical analysis of convergence proves these properties. Simulation results matching the analysis are also presented.

关键词： Wireless sensor networks

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A survey of routing using DHTs over wireless sensor networks

A survey of routing using DHTs over wireless sensor networks

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6th international conference on Information Technology and Applications, ICITA 2009

作者： Vinh, Vinh thanh Chan, Hung Nguyen Viet, Binh Pham Huu, thanh Nguyen Faculty of Information Technology ThaiNguyen University Quyet Thang Commune Thai Nguyen city Viet Nam Faculty of Electronics and Telecommunications Hanoi University of Technology 1 Dai Co Viet street Hanoi Viet Nam

ISBN: (纸本)9789810830298

In recent years, wireless sensor networks (WSNs) has gained a lot of attention in both research and application fields. A fundamental goal of researches in WSNs is to reduce the communication operations and prolong the total lifetime of sensor networks. therefore, researchers are focusing on optimal routing techniques which are one of the main factors to reduce consumable energy of sensor and wireless sensor networks. distributed Hash Tables (DHTs) over WSNs is a new routing paradigm promises several advantages over conventional routing protocols. this paper presents an overview of using DHTs in WSNs, especially routing techniques using DHTs over WSNs such as GHT, CSN, CHR, T-DHT, VRR and ScatterPastry. After that we compare with methods which used DHTs in WSNs with three main parameters such as Scalability, Energy-efficient, and Data storage/lookup efficiency. © ICITA 2009.

关键词： Wireless sensor networks

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Precision time synchronization using ieee 1588 for wireless sensor networks

Precision time synchronization using IEEE 1588 for wireless ...

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7th ieee/IFIP international conference on Embedded and Ubiquitous computing, EUC 2009

作者： Cho, Hyuntae Jung, Jeonsu Cho, Bongrae Jin, Youngwoo Lee, Seung-Woo Baek, Yunju Dept. of Computer Engineering Pusan National University Busan Korea Republic of BcN Division NoC Technology Team ETRI Daejeon Korea Republic of

ISBN: (纸本)9780769538235

Wireless sensor networks are evolving from relatively undemanding applications to applications which have stronger requirements. the coordination of distributed entities and events requires time synchronization. Although a number of methods have been studied for WSNs, some applications require high precision time synchronization. Precision time synchronization enables a variety of extensions of applications. the ieee 1588 precision time protocol (PTP) provides a standard method to synchronize devices in a network with sub-microsecond precision. this paper deals with precision time synchronization using ieee 1588 over wireless sensor networks. Precision time synchronization using ieee 1588 provides compatibility between heterogeneous systems in WSNs. this paper also presents experiments and performance evaluation of precision time synchronization in WSNs. Our result established a method for nodes in a network to maintain their clocks to within a 200 nanosecond offset from the reference clock of a master node. © 2009 ieee.

关键词： sensor nodes

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