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检索条件"任意字段=5th ACM Conference on Embedded Networked Sensor Systems"

共 1274 条记录，以下是931-940 订阅

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A Building Block Approach to sensornet systems 08

A Building Block Approach to Sensornet Systems

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6th acm conference on embedded networked sensor systems

作者： Dutta, Prabal Taneja, Jay Jeong, Jaein Jiang, Xiaofan Culler, David Univ Calif Berkeley Div Comp Sci Berkeley CA 94720 USA

ISBN: (纸本)9781595939906

We present a building block approach to hardware platform design based on a decade of collective experience in this area, arriving at an architecture in which general-purpose modules that require expertise to design and incorporate commonly-used functionality are integrated with application-specific carriers that satisfy the unique sensing, power supply, and mechanical constraints of an application. Of course, modules are widespread, but our focus is far less on the performance of any individual module and far more on an overall architecture that supports the prototype, pilot, and production stages of design, and preserves the artifacts and learnings accumulated along the way. We present heuristics for partitioning functionality between modules and carriers, and identify guidelines for their interconnection. Our approach advocates exporting a wide electrical interface, eliminating the system bus, and supporting many physical interconnect options for modules and carriers. We evaluate this approach by constructing a family of general-purpose modules and application-specific carriers that achieve a high degree of reuse despite very different application requirements. We show that this approach shortens platform development time-to-result for novice graduate students, making custom platforms broadly accessible.

关键词： Architecture Mote Wireless sensor Network

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Passive Diagnosis for Wireless sensor Networks 08

Passive Diagnosis for Wireless Sensor Networks

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6th acm conference on embedded networked sensor systems

作者： Liu, Kebin Li, Mo Liu, Yunhao Li, Minglu Guo, Zhongwen Hong, Feng Shanghai Jiao Tong Univ Shanghai Peoples R China

ISBN: (纸本)9781595939906

Network diagnosis, an essential research topic for traditional networking systems, has not received much attention for wireless sensor networks. Existing sensor debugging tools like sympathy or EmStar rely heavily on an add-in protocol that generates and reports a large amount of status information from individual sensor nodes, introducing network overhead to a resource constrained and usually traffic sensitive sensor network. We report in this study our initial attempt at providing a light-weight network diagnosis mechanism for sensor networks. We propose PAD, a probabilistic diagnosis approach for inferring the root causes of abnormal phenomena. PAD employs a packet marking algorithm for efficiently constructing and dynamically maintaining the inference model. Our approach does not incur additional traffic overhead for collecting desired information. Instead, we introduce a probabilistic inference model which encodes internal dependencies among different network elements, for online diagnosis of an operational sensor network system. Such a model is capable of additively reasoning root causes based on passively observed symptoms. We implement the PAD design in our sea monitoring sensor network test-bed and validate its effectiveness. We further evaluate the efficiency and scalability of this design through extensive trace-driven simulations.

关键词： Wireless sensor Networks Diagnosis

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Declarative Tracepoints: A Programmable and Application Independent Debugging System for Wireless sensor Networks 08

Declarative Tracepoints: A Programmable and Application Inde...

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6th acm conference on embedded networked sensor systems

作者： Cao, Qing Abdelzaher, Tarek Stankovic, John Whitehouse, Kamin Luo, Liqian Univ Illinois Dept Comp Sci Chicago IL 60680 USA

ISBN: (纸本)9781595939906

Effective debugging usually involves watching program state to diagnose bugs. When debugging sensor network applications, this approach is often time-consuming and error-prone, not only because of the lack of visibility into system state, but also because of the difficulty to watch the right variables at the right time. In this paper, we present declarative tracepoints, a debugging system that allows the user to insert a group of action-associated checkpoints, or tracepoints, to applications being debugged at runtime. Tracepoints do not require modifying application source code. Instead, they are written in a declarative, SQL-like language called TraceSQL independently. By triggering the associated actions when these checkpoints are reached, this system automates the debugging process by removing the human from the loop. We show that declarative tracepoints are able to express the core functionality of a range of previously isolated debugging techniques, such as EnviroLog, NodeMD, Sympathy, and StackGuard. We describe the design and implementation of the declarative tracepoints system, evaluate its overhead in terms of CPU slowdown, illustrate its expressiveness through the aforernentioned debugging techniques, and finally demonstrate that it can be used to detect real bugs using case studies of three bugs based on the development of the LiteOS operating system.

关键词： Declarative Tracepoints embedded Debugging Wireless Sellsor Networks

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A Methodology for In-Network Evaluation of Integrated Logical-Statistical Models 08

A Methodology for In-Network Evaluation of Integrated Logica...

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6th acm conference on embedded networked sensor systems

作者： Singh, Anu Ramakrishnan, C. R. Ramakrishnan, I. V. Warren, David S. Wong, Jennifer L. SUNY Stony Brook Dept Comp Sci Stony Brook NY 11794 USA

ISBN: (纸本)9781595939906

Synthesizing high-level semantic knowledge from low-level sensor data is an important problem in many sensor network applications. Programming a network to perform such synthesis in situ is especially difficult due to the stringent resource constraints, unreliable wireless communication, and complex distributed algorithms and network protocols required to manipulate the data. Recently, a declarative programming language called Snlog [5] has been developed to address this problem. However, statistical reasoning for modeling noise in the context of sensor networks has not been addressed in Snlog. In this paper, we develop a methodology based on the PRISM [361 framework, which integrates logical and statistical reasoning, for specifying sensor network programs that deal with noisy data and tolerate faults in the network. the relationship between high-level (synthesized) and low-level (observed) data is captured by logical rules, while statistical models are used to specify computations in the presence of noise and faults. We illustrate our methodology with three examples: (i) estimating temperature at various points in a region, (ii) evaluating the trajectory of an object observed by a sensor network, based on the Hidden Markov Model, and (iii) evaluating most reliable communication paths between sensor nodes. We analyze the results of simulations as well as an experimental deployment to evaluate the practical feasibility of our approach.

关键词： sensor networks In-network analysis Logical-Statistical models

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Active RFID-Based Indoor Object Management System in sensor-embedded Environment

Active RFID-Based Indoor Object Management System in Sensor-...

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5th International conference on networked Sensing systems

作者： Mori, Taketoshi Siridanupath, Chetaphan Noguchi, Hiroshi Sato, Tomomasa Univ Tokyo Bunkyo Ku Tokyo 1138656 Japan

No abstract available

ISBN: (纸本)9784907764319

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Creating Greener Homes with IP-Based Wireless AC Energy Monitors 08

Creating Greener Homes with IP-Based Wireless AC Energy Moni...

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6th acm conference on embedded networked sensor systems

作者： Jiang, Xiaofan Dawson-Haggerty, Stephen Taneja, Jay Dutta, Prabal Culler, David Univ Calif Berkeley Div Comp Sci Berkeley CA 94720 USA

ISBN: (纸本)9781595939906

A home where every major appliance can be monitored for energy consumption and individually controlled wirelessly has long been a dream of gadgeteers and the green-conscious alike. Research has shown that real-time, per-appliance electricity usage feedback call induce behavior changes that lead to 10% to 20% reduction in usage [2]. We present acmE (AC Meter): an IP-based wireless device that provides real time energy usage measurement and control for AC devices. this device fills the gap between inexpensive watt-meters and expensive networked enterprise energy monitors. We show that acmE provides accurate measurement of active, reactive, and apparent energy from milli-amps to tens of amps. We also demonstrate its ability to remotely switch the connected appliance. In this demo, we will present a complete home monitoring system that integrates a set of acmEs with art 802.15.4-to-802.11 router and a web server. Energy measurements will be pushed directly into a database by the acmEs via UDP and retrieved by the web server continuously or on-demand to generate real-time graphs.

关键词： Architecture AC Meter Green Energy Power Platform Wireless sensor Network Mote Measurement

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Wireless sensor network for substation monitoring: Design and deployment 08

Wireless sensor network for substation monitoring: Design an...

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6th acm conference on embedded networked sensor systems, SenSys 2008

作者： Nasipuri, Asis Cox, Robert Alasti, Hadi Van Der Zel, Luke Rodriguez, Bienvenido McKosky, Ralph Graziano, Joseph A. ECE Department Univ. of NC at Charlotte 9201 University City Blvd. Charlotte NC 28223 United States EPRI-Transmissions and Substations 9625 Research Drive Charlotte NC 28262 United States Research and Technology Applications 1101 Market Street Chattanooga TN 37402 United States

ISBN: (纸本)9781595939906

We present the design and performance of a wireless sensor network that is deployed in a substation for monitoring the health of power subsystems such as circuit breakers, transformers and transformer bushings. the sensor network consists of 45 low power nodes for temperature sensing and a high power node that is capable of performing more specialized computations. All nodes communicate over a multihop mesh network that uses a dynamic link-quality based routing protocol. the nodes are solar powered and are capable of operating autonomously for multiple years. © 2008 acm.

关键词： Low power electronics

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Dustminer: Troubleshooting Interactive Complexity Bugs in sensor Networks 08

Dustminer: Troubleshooting Interactive Complexity Bugs in Se...

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6th acm conference on embedded networked sensor systems

作者： Khan, Mohammad Maifi Hasan Le, Hieu Khac Ahmadi, Hossein Abdelzaher, Tarek F. Han, Jiawei Univ Illinois Dept Comp Sci Urbana IL 61801 USA

ISBN: (纸本)9781595939906

this paper presents a tool for uncovering bugs due to interactive complexity in networked sensing applications. Such bugs are not: localized to one component that is faulty, but rather result from complex and unexpected interactions between multiple often individually non-faulty components. Moreover, the manifestations of these bugs are often not repeatable, making them particularly hard to find, a's the particular sequence of events that invokes the bug may not be easy to reconstruct. Because of the distributed nature of failure scenarios, our tool looks for sequences of events that may be responsible for faulty behavior, as Opposed to localized bugs such as a bad pointer in a module. All extensible framework is developed where a front-end collects runtime data logs of the system being debugged and an offline back-end uses frequent discriminative pattern mining to uncover likely causes of failure. We provide a case study of debugging a recent multichannel MAC protocol that was found to exhibit corner cases of poor performance (worse than single channel MAC). the tool helped uncover event sequences that lead to a highly degraded mode of operation. Fixing the problem significantly improved the performance of the protocol. We also provide a detailed analysis of tool overhead in terms of memory requirements and impact oil the running application.

关键词： Protocol debugging Distributed automated debugging Wireless sensor networks

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Steady and Fair Rate Allocation for Rechargeable sensors in Perpetual sensor Networks 08

Steady and Fair Rate Allocation for Rechargeable Sensors in ...

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6th acm conference on embedded networked sensor systems

作者： Fan, Kai-Wei Zheng, Zizhan Sinha, Prasun Ohio State Univ Dept Comp Sci & Engn Columbus OH 43210 USA

ISBN: (纸本)9781595939906

Renewable energy enables sensor networks with the capability to recharge and provide perpetual data services. Due to low recharging rates and the dynamics of renewable energy such as solar and wind power, providing services without interruptions caused by battery runouts is non-trivial. Most environment monitoring applications require data collection from all nodes at a steady rate. the objective of this paper is to design a solution for fair and high throughput data extraction from all nodes in presence of renewable energy sources. Specifically, we seek to compute the lexicographically maximum data collection rate for each node, such that no node will ever run out of energy. We propose a centralized algorithm and an asynchronous distributed algorithm that can compute the optimal lexicographic rate assignment for all nodes. the centralized algorithm jointly computes the optimal data collection rate for all nodes along with the flows on each link, while the distributed algorithm computes the optimal rate when the routes are pre-determined. We prove the optimality for both the centralized and the distributed algorithms, and use a testbed with 155 sensor nodes to validate the distributed algorithm.

关键词： Rechargeable sensor Networks Rate Assignment

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A multiagent approach for an UWB location embedded software architecture 08

A multiagent approach for an UWB location embedded software ...

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5th International conference on Soft Computing As Transdisciplinary Science and Technology, CSTST '08

作者： Occello, Michel Jamont, Jean-Paul Guillermin, Regis Pezzin, Manuel LCIS Universitï de Grenoble 50 rue B. de Laffemas 26000 Valence France CEA-LETI Grenoble 17 rue des Martyrs 38054 Grenoble France

ISBN: (纸本)9781605580463

the contribution of this paper aims to show how collective intelligence systems as multiagent systems can be specialized and used to build wireless sensor embedded decision software. the paper focuses on methodological, architectural and design aspects of embedded multiagent systems through the experimentation of the DIAMOND multiagent method on an application to distributed location services in Ultra Wide Band sensor networks. Copyright 2008 acm.

关键词： Wireless sensor networks

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