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检索条件"任意字段=9th IEEE International Conference on Distributed Computing in Sensor Systems, DCoSS 2013"

共 236 条记录，以下是11-20 订阅

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Probe-based Transmission Power Control for Dependable Wireless sensor Networks

Probe-based Transmission Power Control for Dependable Wirele...

引用

9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Poettner, Wolf-Bastian Wolf, Lars Tech Univ Carolo Wilhelmina Braunschweig Inst Operating Syst & Comp Networks IBR D-38106 Braunschweig Germany

ISBN: (纸本)9780769550411

Dependable Wireless sensor Networks for industrial process automation, monitoring and control applications have high demands regarding network reliability in terms of timely delivery and packet loss. In large industrial facilities, interference between neighboring networks is a major problem that can be mitigated by reducing the radio transmission power to the necessary minimum. However, reliability of the network should not be compromised even in spite of packet loss bursts. In this paper we aim at keeping the link within certain burstiness bounds while still minimizing the transmission power. We present evaluation results showing that the burstiness changes with the receiver signal strength. Based on this observation we present two mechanisms for dependable wireless sensor networks and study the performance in our testbed.

关键词： power control telecommunication control telecommunication network reliability telecommunication power management wireless sensor networks

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Non-intrusive Tracking of Patients With Dementia Using a Wireless sensor Network

Non-intrusive Tracking of Patients With Dementia Using a Wir...

引用

9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Diaz-Ramirez, Arnoldo Murrieta, Fabian N. Atempa, Jorge A. Bonino, Francisco A. Inst Tecnol Mexicali Dept Comp Syst Mexicali Baja California Mexico

As a consequence of the aging of the world population, society and governments must face major challenges regarding people9;s health. In recent years, researches have been interested in investigating how the techno... 详细信息

ISBN: (纸本)9780769550411

As a consequence of the aging of the world population, society and governments must face major challenges regarding people's health. In recent years, researches have been interested in investigating how the technology can be used to improve the healthcare and assistance of patients with dementia, as the Alzheimer's disease. In this paper, we propose a non-intrusive pervasive model to assist patients with dementia, based on the use of a wireless sensor network. Using high availability and low cost binary sensors, the proposed model is able to determine in real-time the location of a patient, and to emit alerts if one leaves a safe place without supervision.

关键词： Wireless sensor networks ubiquitous computing ambient intelligence healthcare pervasive applications Alzheimer's disease

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Self-Organizing WSN Protocol for Real-Time Communication Requirements

Self-Organizing WSN Protocol for Real-Time Communication Req...

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Sallai, Janos Horvath, Peter Koutsoukos, Xenofon Vanderbilt Univ Inst Software Integrated Syst Nashville TN 37212 USA

ISBN: (纸本)9780769550411

In this paper we propose a distributed, low-power, self-organizing MAC scheme for low-power wireless sensor and control applications. In such applications, nearly periodic traffic needs to be handled so that the communication delays are minimized and the transmission is as predictable as possible. We propose Asynchronous Random Schedules with Collision Forecast (ARS/CF) for this purpose, together with a multi-channel extension based on an improved modulation scheme to improve capacity scaling of the basic ARS/CF scheme. We analyze and simulate the basic single-hop ARS/CF implementation with regard to throughput and delay when used both in single- and multi-channel settings. Finally, we consider the implementation of ARS/CF in a multi-hop setting.

关键词： access protocols delays telecommunication traffic wireless sensor networks

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Efficient sensor Fault Detection Using Combinatorial Group Testing

Efficient Sensor Fault Detection Using Combinatorial Group T...

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Lo, Chun Liu, Mingyan Lynch, Jerome P. Gilbert, Anna C. Univ Michigan Ann Arbor MI 48109 USA

ISBN: (纸本)9780769550411

this paper introduces a novel use of concepts from combinatorial group testing and Kalman filtering in detecting faulty sensors in a network when faults are relatively rare. By assigning sensors to specific groups and performing Kalman filter-based fault detection over these groups, we can obtain a small binary detection outcome, which can be decoded to reveal the fault state of all sensors in the network. Compared to existing methods, our algorithm achieves similar or better detection accuracy with fewer tests and thus lower computational complexity. We perform extensive numerical analysis using a set of real vibration data collected from the New Carquinez Bridge in California using an 18-sensor network mounted on the bridge.

关键词： sensor networks fault detection group testing

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Efficient Wireless Recharging in sensor Networks

Efficient Wireless Recharging in Sensor Networks

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Angelopoulos, Constantinos Marios Nikoletseas, Sotiris Raptis, theofanis P. Comp Technol Inst & Press Diophantus CTI Athens Greece

ISBN: (纸本)9780769550411

We study the problem of efficient wireless energy recharging in Wireless Rechargeable sensor Networks (WRSN). In such networks a special mobile entity (called the Mobile Charger) traverses the network and wirelessly replenishes the energy of sensor nodes. In contrast to most current approaches, we envision methods that are distributed and adaptive and use limited network information. Also, our methods can be used together with any underlying routing protocol (since they implicitly adapt to it). We propose alternative strategies for efficient recharging, addressing key issues of wireless recharging which we identify, most notably (i) to what extent each sensor should be recharged (ii) what are good trajectories the MC should follow. A simulation evaluation indicates significant performance gains in the network lifetime. Actually, the partial knowledge charging protocol's performance gets quite close to the performance of the centralized, global knowledge method and perform particularly well in heterogeneous networks.

关键词： routing protocols wireless sensor networks

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Chemistry-Inspired Algorithm for Emergent distributed Consensus in WSNs

Chemistry-Inspired Algorithm for Emergent Distributed Consen...

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Monti, Massimo Tschudin, Christian F. Sanguinetti, Luca Luise, Marco Univ Basel Dept Math & Comp Sci Basel Switzerland

ISBN: (纸本)9780769550411

In wireless sensor and actor networks (WSANs), nodes collaborate to accomplish distributed sensing and computation. One of the most attractive features is that global macro-behaviors in the network emerge from local micro-actions in and interactions between nodes. In this paper, we review a recently proposed approach, which bases on a chemical metaphor and its related theory, to design, analyze, and implement systems with such an emerging property. As an example of distributed, emerging computation in WSNs, we extend an existing gossip-like chemistry-inspired protocol (the "Disperser") and propose a new chemically driven solution to consensus problems that is applicable in WSNs. We analyze it with a signal processing approach and validate results through simulations. the proposed chemical algorithm is not based on the iterative packet-exchange but rather on a continuous rate-modulation. the algorithm is thought to lie at the physical layer and to directly control the basic transmission hardware of the nodes in a sort of protocol-less operation mode.

关键词： Broadcast Chemistry-Inspired Algorithms distributed Consensus Emergent Behavior Gossip Self-organization

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RATFAT: ReAl-Time FAT for Cooperative Multitasking Environments in WSNs

RATFAT: ReAl-Time FAT for Cooperative Multitasking Environme...

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Schildt, Sebastian Poettner, Wolf-Bastian Buesching, Felix Wolf, Lars Tech Univ Carolo Wilhelmina Braunschweig Inst Operating Syst & Comp Networks D-38106 Braunschweig Germany

ISBN: (纸本)9780769550411

Today, many sensor nodes are equipped with a microSD slot to provide a cost effective way to store large amounts of data. When using the FAT file system, data collected by a node can be easily read by a PC without the need for any special software or communication protocol. While several FAT implementations for microcontrollers do exist, they are not suited for real-time applications. For a WSN in an industrial scenario where a node needs to run a closed loop control program, logging to a non-real-time capable persistent storage system is not an option. In this paper we present RATFAT, an efficient implementation of a flexible real-time capable FAT file system for Contiki, that can be used for applications requiring real-time guarantees.

关键词： real-time systems storage allocation wireless sensor networks

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sensor Networks for Railway Monitoring: Detecting Trains from their distributed Vibration Footprints

Sensor Networks for Railway Monitoring: Detecting Trains fro...

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Berlin, Eugen Van Laerhoven, Kristof Tech Univ Darmstadt Dept Comp Sci Darmstadt Germany

ISBN: (纸本)9780769550411

We report in this paper on a wireless sensor network deployment at railway tracks to monitor and analyze the vibration patterns caused by trains passing by. We investigate in particular a system that relies on having a distributed network of sensor nodes that individually contain efficient feature extraction algorithms and classifiers that fit the restricted hardware resources, rather than using few complex and specialized sensors. A feasibility study is described on the raw data obtained from a real-world deployment on one of Europe's busiest railroad sections, which was annotated with the help of video footage and contains vibration patterns of 186 trains. these trains were classified in 6 types by various methods, the best performing at an accuracy of 97%. the trains' length in wagons was estimated with a mean-squared error of 3.98. Visual inspection of the data shows further opportunities in the estimation of train speed and detection of worn-out cargo wheels.

关键词： feature extraction sensor data abstraction event classification railway monitoring wireless sensor networks

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Uncovering the Impact of Minimum-Energy Routing on Lifetime of Wireless sensor Networks

Uncovering the Impact of Minimum-Energy Routing on Lifetime ...

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Soylev, Arda Bicakci, Kemal Tavli, Bulent KTO Karatay Univ Dept Comp Engn Konya Turkey

ISBN: (纸本)9780769550411

It is well-known that in wireless sensor networks using minimum-energy paths to transfer data from sensor nodes to base station is not an energy-balancing option and not the optimal solution if lifetime, defined as the duration till the first node in the network exhausts all its energy, is of concern. However, the net effect of minimum-energy routing on network lifetime has not been studied in detail before. In this study, we present comparative analysis using both simulations and linear programming models to investigate this issue with respect to various system parameters such as energy model, network area and number of nodes. Our results show that network lifetime achieved with minimum-energy routing could be as low as 19.3% of the maximum achievable lifetime depending on the values of other system parameters.

关键词： Wireless sensor network linear programming network lifetime routing energy efficiency

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Low-Power Self-Energy Meter for Wireless sensor Network

Low-Power Self-Energy Meter for Wireless Sensor Network

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Fernandez, Carlos Bouvier, Diego Villaverde, Jorge Steinfeld, Leonardo Oreggioni, Julian Fac Ingn UdelaR Inst Ingn Elect Montevideo Uruguay

ISBN: (纸本)9780769550411

Real-time measurement of the energy consumption of wireless sensor network nodes in the field has many interesting applications that range from predicting the remaining battery charge to the energy efficiency assessment of communication protocols. However, designing such a system presents many challenges. In this work we present a measurement method and circuit, named Self-Energy Meter (SEM), that easily adds to a sensor node the capability of measuring its own energy consumption. the SEM developed has very low power consumption, ensuring an almost negligible impact in the battery lifetime. It also solves the problem of handling a dynamic range of five decades. Results from simulations show that the SEM is highly linear, with a coefficient of determination of 0.996, presenting a very low temperature drift, and is almost independent of the power supply.

关键词： energy conservation energy consumption protocols wireless sensor networks

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