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Localization and coverage for high density sensor networks

Localization and coverage for high density sensor networks

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5th ieee international conference on Pervasive computing and Communications

作者： Bahi, Jacques M. Makhoul, Abdallah Mostefaoui, Ahmed Univ Franche Comte LIFC Comp Sci Lab Rue Engel GrosBP 527 F-90016 Belfort France

ISBN: (纸本)9780769527888

the only power source of nodes in sensor networks is usually provided by batteries which have a determined lifetime. In order to increase the total network lifetime, neighbors nodes can alternate between active (receive, transmit...) and sleep mode. the objective is to find sets of active nodes that ensure as much as possible the zone coverage. In this paper we will introduce a new method for nodes scheduling in sensor networks. We exploit a mobile beacon localization approach to construct sets of active nodes. the mobile beacon follows the Hilbert space filling curve, that has several properties. It divides the area into unit squares by the mean of linear ordering. In our approach, we chose the Hilbert curve order, in a way that, every unit square will be covered by one and only one sensor node and all the reminder nodes inside this unit square will go to sleep until the first node dies. It is an energy saved approach because nodes communicate only with the mobile beacon. the experimental studies we conducted, confirmed the effectiveness of our approach.

关键词： sensor networks

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An automatic software decentralization framework for distributed device collaboration

An automatic software decentralization framework for distrib...

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27th international conference on distributed computing systems Workshops, ICDCSW'07

作者： Iwasaki, Yohei Kawaguchi, Nobuo Graduate School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan

ISBN: (纸本)0769528384

Recently, many low-profile devices with RF communication features have been developed such as sensor network nodes and one-chip microcomputers. this caused a variety of gadgets join to the wireless network. However, in order to realize collaborations between these devices, generally we have to develop complicated distributed software. In this paper, we propose an automatic software decentralization method, which converts a stand-alone software program into distributed software programs. In order to execute the generated software on these low-profile devices, we employ the programming language nesC for a decentralization target. We also have implemented applications with real hardware devices to exemplify that the proposed method successfully improves the ease of development. © 2007 ieee.

关键词： distributed computer systems

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Memorizing what you did last week: Towards detailed actigraphy with a wearable sensor

Memorizing what you did last week: Towards detailed actigrap...

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27th international conference on distributed computing systems Workshops, ICDCSW'07

作者： Van Laerhoven, Kristof Aronsen, André Kvist Darmstadt University of Technology

ISBN: (纸本)0769528384

With sensors becoming smaller and more power efficient, wearable sensors that anyone could wear are becoming a feasible concept. We demonstrate a small lightweight module, called Porcupine, which aims at continuously monitoring human activities as long as possible, and as fine-grained as possible. We present initial analysis of a set of abstraction algorithms that combine and process raw accelerometer data and tilt switch states, to get descriptors of the user's motion-based activities. the algorithms are running locally, and the information they produce is stored in on-board memory for later analysis. © 2007 ieee.

关键词： sensors

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A distributed energy management approach for autonomous power supply systems

A distributed energy management approach for autonomous powe...

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5th ieee international conference on Industrial Informatics

作者： Hegny, Ingo Holzer, Roland Grabmair, Gunnar Zoitl, Alois Auinger, Franz Wahlmueller, Ewald Vienna Univ Technol Automat & Control Inst Fac Elect Engn & Informat Technol Gusshausstr 27-29-376 A-1040 Vienna Austria Univ Appl Sci Dept Ind Informat Salzburg Austria Fronius Int GmbH Thalheim Australia

ISBN: (纸本)9781424408504

Currently applied autonomous power supplies are designed for specific energy demands and therefore rather inflexible. For an increased user friendliness, allowing attaching and detaching electrical devices without new load calculations, a flexible Power Distribution System is necessary. this can be reached by applying an Energy Management System. A concept for such a system, that is scalable by distributing it to multiple devices, is presented in this work. Reconfiguration, such as changing the load distribution algorithm, can be realized without downtime. this is possible by implementing the concept as an IEC 61499 application. A field demonstrator is set up using embedded controllers, equipped with a network interface. To perform necessary measurement and switching tasks, an interface board is developed. the desired system behavior, a stable operation of a flexible autonomous power supply system, can be achieved in the simulation on PC hardware as well as on the field demonstrator set up.

关键词： Electric power systems

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Iso-Map: Energy-efficient contour mapping in wireless sensor networks

Iso-Map: Energy-efficient contour mapping in wireless sensor...

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27th international conference on distributed computing systems, ICDCS'07

作者： Liu, Yunhao Li, Mo Department of Computer Science and Engineering Hong Kong University of Science and Technology

ISBN: (纸本)0769528376

Contour mapping is a crucial part of many wireless sensor network applications. Many efforts have been made to avoid collecting data from all the sensors in the network and producing maps at the sink, which is proven to be inefficient. the existing approaches (often aggregation based), however, suffer from heavy transmission traffic and incur large computational overheads on each sensor node. We propose Iso-Map, an energy-efficient protocol for contour mapping, which builds contour maps based solely on the reports collected from intelligently selected "isoline nodes" in wireless sensor networks. Iso-Map achieves high-quality contour mapping while significantly reducing the generated traffic from O(n) to 0(√n), where n is the total number of sensor nodes in the field. the per-node computation overhead is also restrained as a constant. We conduct comprehensive trace-driven simulations to verify this protocol, and demonstrate that Iso-Map outperforms the previous approaches in the sense that it produces contour maps of high fidelity with significantly reduced energy cost. © 2007 ieee.

关键词： Wireless sensor networks

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Secure multipath routing protocol for wireless sensor networks

Secure multipath routing protocol for wireless sensor networ...

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27th international conference on distributed computing systems Workshops, ICDCSW'07

作者： Nasser, Nidal Chen, Yunfeng Department of Computing and Information Science University of Guelph Guelph Ont. N1G 2W1 Canada

ISBN: (纸本)0769528384

One important issue when designing Wireless sensor Network (WSN) is the routing protocol that makes the best use of the severely limited resource presented by WSN, especially the energy limitation. Another import factor required attention from researchers is providing as much security to the application as possible. In this paper, we propose a new routing protocol called SEER: Secure and EnergyEfficient multipath Routing protocol. SEER uses multipath alternately as the path for communicating between two nodes thus prolong the lifetime of the network. On the other hand, SEER is effectively resistive to some specific attacks that have the character of pulling all traffic through the malicious nodes by advertising an attractive route to the destination. the performance of our protocol is compared to the Directed Diffusion protocol. Simulation results show that our protocol surpasses the Directed Diffusion protocol in terms of throughput, control overhead and network lifetime. © 2007 ieee.

关键词： Routing protocols

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Dwarf: Delay-aWAre robust forwarding for energy-constrained wireless sensor networks

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3rd ieee international conference on distributed computing in sensor systems

作者： Strasser, Mario Meier, Andreas Langendoen, Koen Blum, Philipp ETH Zurich Switzerland Delft Univ Technol Delft Netherlands

ISBN: (纸本)9783540730897

With the field of wireless sensor networks rapidly maturing, the focus shifts from "easy" deployments, like remote monitoring, to more difficult domains where applications impose strict, real-time constraints on performance. One such class of applications is safety critical systems, like fire and burglar alarms, where events detected by sensor nodes have to be reported reliably and timely to a sink node. A complicating factor is that systems must operate for years without manual intervention, which puts very strong demands on the energy efficiency of protocols running on current sensor-node platforms. Since we are not aware of a solution that meets all requirements of safety-critical systems, i.e. provides reliable data delivery and low latency and low energy consumption, we present Dwarf, an energy-efficient, robust and dependable forwarding algorithm. the core idea is to use unicast-based partial flooding along with a delay-aware node selection strategy. Our analysis and extensive simulations of real-world scenarios show that Dwarf tolerates large fractions of link and node failures, yet is energy efficient enough to allow for an operational lifetime of several years.

关键词： sensor nodes

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Using ZigBee to control a swarm of low cost RFID foraging robots

Using ZigBee to control a swarm of low cost RFID foraging ro...

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4th international conference on Cybernetics and Information Technologies, systems and Applications/5th Int Conf on computing, Communications and Control Technologies

作者： Howell, Abraham L. McGrann, Roy T. R. Eckert, Richard R. SUNY Binghamton Dept Mech Engn Binghamton NY 13902 USA SUNY Binghamton Comp Sci Dept Binghamton NY 13902 USA

ISBN: (纸本)9781934272077

Evolving and testing foraging intelligence on a single robot is not only time consuming, but also such testing does not leverage the advantages associated with multi-agent interaction and collective knowledge. To reduce evolution time and make use of this knowledge all robots in a swarm must be networked. this can be achieved when each robot either has a local network-capable device or wirelessly communicates with an ieee 802.11 capable device. Additionally, robots in a swarm can be networked using Bluetooth, ieee 802.15.1, however a maximum of seven devices are allowed to form a piconet. To network more than seven devices requires the creation of multiple piconets. these may be effective strategies for small swarms, but when dealing with larger swarms this becomes cost prohibitive and a waste of computing resources. this paper investigates a low cost and low power wireless alternative to ieee 802.11 & 802.15.1 and how it can be used to form a multi-agent swarm of networked robots that forage for food stored on passive Radio Frequency Identification (RFID) tags.

关键词： ZigBee network RFID centralized and distributed swarm control

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Practical exploitation of the energy-latency tradeoff for sensor network broadcast

Practical exploitation of the energy-latency tradeoff for se...

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5th ieee international conference on Pervasive computing and Communications

作者： Miller, Matthew J. Gupta, Indranil Univ Illinois Dept Comp Sci Coordinated Sci Lab 1304 W Springfield Ave Urbana IL 61801 USA Univ Illinois Dept Comp Sci Urbana IL USA

ISBN: (纸本)9780769527888

As devices become more reliant on battery power, it is essential to design energy efficient protocols. While there is a vast amount of research into power save protocols for unicast traffic, relatively little attention has been given to broadcast traffic. In previous work [1], we proposed Probability-Based Broadcast Forwarding (PBBF) to address broadcast power save by allowing users to select a desired tradeoff between energy consumption, latency, and reliability. In this paper we extend our previous work in two ways. First, we introduce a new parameter that allows a tradeoff between reliability and packet overhead to give users more options. Second, we implement PBBF on the TinyOS platform [2) to evaluate it beyond the analysis and simulation from our previous work. Our evaluation demonstrates the tradeoffs possible using PBBF on sensor hardware.

关键词： Wireless sensor networks

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Data quality and query cost in wireless sensor networks

Data quality and query cost in wireless sensor networks

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5th ieee international conference on Pervasive computing and Communications

作者： Yates, David Nahum, Erich Kurose, Jim Bentley Coll Comp Informat Syst Dept Waltham MA 02452 USA IBM TJ Watson Res Ctr Hawthorne NY 10532 USA Univ Massachusetts Dept Comp Sci Amherst MA 01003 USA

ISBN: (纸本)9780769527888

this research is motivated by emerging, real-world wireless sensor network applications for monitoring and control. We examine the benefits and costs of caching data for such applications. We propose and evaluate several approaches to querying for, and then caching data in a sensor field data server. We show that for some application requirements (i.e., when delay drives data quality), policies that emulate cache hits by computing and returning approximate values for sensor data yield a simultaneous quality improvement and cost savings. this win-win is because when system delay is sufficiently important, the benefit to both query cost and data quality achieved by using approximate values outweighs the negative impact on quality due to the approximation. In contrast, when data accuracy drives quality, a linear trade-off between query cost and data quality emerges. We also identify caching and lookup policies for which the sensor field query rate is bounded when servicing an arbitrary workload of user queries. this upper bound is achieved by having multiple user queries share the cost of a sensor field query. Finally, we demonstrate that our results are robust to the manner in which the environment being monitored changes using two different sensor field models.

关键词： Wireless sensor networks

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