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

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Using more realistic data models to evaluate sensor network data processing algorithms

Using more realistic data models to evaluate sensor network ...

引用

conference on Local Computer Networks (LCN)

作者： Yan Yu D. Estrin M. Rahimi R. Govindan CENS California Univ. Los Angeles CA USA

Due to lack of experimental data and sophisticated models derived from such data, most data processing algorithms from the sensor network literature are evaluated with data generated from simple parametric models. Unfortunately, the type of data input used in the evaluation often significantly affects the algorithm performance. Our case studies of a few widely-studied sensor network data processing algorithms demonstrated the need to evaluate algorithms with data across a range of parameters. In conclusion, we propose our synthetic data generation framework.

关键词： Data models Data processing Sampling methods Parametric statistics distributed computing Radar scattering Intersymbol interference sensor systems Data compression Statistical analysis

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WASP: a radio geolocation system on highly resource constrained mobile platforms

WASP: a radio geolocation system on highly resource constrai...

引用

international conference and Workshop on Engineering of Computer-Based systems

作者： Kumar Chhokra T. Bapty J. Scott S. Winberg J. Sztipanovits D. van Rheeden B. Abbott Vanderbilt University USA Southwest Research Institute USA Southwest Research Institute

In recent years, there has been an increased need for surveillance capabilities in both civilian and military arenas. Mobile unmanned sensor fleets have long been envisioned as a tool for acquiring such intelligence. We describe a geolocation system as a payload for unmanned aerial vehicles. In particular, we address the issues that arise in designing an inexpensive, distributed, mobile, RF sensor processing system: low payload cost; power-limited components; real-time constraints; absence of common clocks; and varying environmental conditions. We also target, qualitatively, the tradeoff decisions across the dimensions of accuracy (of time of arrival estimates and the final geolocation), computational effort, physical dimensions, and operational logistics. The final system architecture, algorithms, and accuracy figures are also described.

关键词： Intelligent sensors Payloads Surveillance Unmanned aerial vehicles Radio frequency sensor systems Costs Real time systems Clocks Physics computing

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DOA estimation of nonstationary sources with time-frequency maximum likelihood method

DOA estimation of nonstationary sources with time-frequency ...

引用

international conference on Communications, Circuits and systems (ICCCAS)

作者： Da Tian Keji Huang Tianqi Chen College of Electronic Engineering University of Electronic Science and Technology China

ISBN: (纸本)0780386477

Direction finding of nonstationary signals using an antenna array is of growing interest in. the signal processing community. We develop a time-frequency maximum likelihood method based on cross pseudo Wigner-Ville distributions (PWVDs) between the array signal vector and the satellite sensor output to obtain the DOA estimates. Compared with methods based on STFD (spatial time-frequency distribution) matrices, the proposed method can make full use of the crossterm TFDs between sources, and signal selective direction finding can be realized with much simpler computation. Moreover, the proposed method can handle signals with the same time-frequency signature. Numerical simulations are provided to demonstrate the validity of the method.

关键词： Direction of arrival estimation Time frequency analysis Maximum likelihood estimation sensor arrays Directive antennas Antenna arrays Array signal processing Satellites distributed computing Numerical simulation

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Dynamic leadership protocol for S-nets

Dynamic leadership protocol for S-nets

引用

ieee international conference on Robotics and Automation (ICRA)

作者： G.J. Barlow T.C. Henderson A.L. Nelson E. Grant Center for Robotics and Intelligent Machines Department of Electrical and Computer Engineering North Carolina State University Raleigh NC USA School of Computing University of Utah Salt Lake UT USA

Smart sensor Networks (S-nets) are groups of stationary agents (S-elements) which provide distributed sensing, computation, and communication in an environment. In order to integrate information from individual agents and to efficiently transmit this information to other agents, these devices must be able to create local groups (S-clusters). A leadership protocol that creates static clusters has been previously proposed. Here, we further develop this protocol to allow for dynamic cluster updating. This accommodates on-the-fly network re-organization in response to environmental disturbances or the gain or loss of S-elements. We outline an informal argument for the correctness of this revised protocol. We describe our embedded system implementation of the leadership protocol in simulation and using a colony of robots. Finally, we present results demonstrating both implementations.

关键词： Protocols Intelligent sensors Mobile robots distributed computing Robot sensing systems Mobile communication Clustering algorithms Robotics and automation Intelligent robots Embedded system

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Scalable HIL simulator with mixed real and virtual sensing capabilities

Scalable HIL simulator with mixed real and virtual sensing c...

引用

international conference on Intelligent Transportation

作者： Z. Papp M. Dorrepaal D.J. Verburg M.R. Koopman A.H.C. Thean TNO Institute of Applied Physics TNO-TPD Delft Netherlands TNO Automotive Helmond Netherlands

The advance in intelligent vehicle systems (IVS) puts emphasis to vehicle-vehicle and vehicle-environment interactions. Sensing and sensory data interpretation play ever increasing role because sensing becomes the primary way of collecting information about the environment. In the IVS application domain the environment is unstructured, which results in demanding data interpretation and control algorithms. Similarly, the control and decision-making algorithms inevitably become more complex in order to be able to cope with the unstructured and dynamic environment. Consequently a sophisticated evaluation/test environment is required, which provides full control of the circumstances, reproducibility and flexible mix of real and virtual components. The paper presents the runtime architecture of the multi-agent based distributed HIL simulation environment (MARS), which assures scalable real-time performance and introduces an extension with high fidelity sensor simulation functionality.

关键词： Mars Computational modeling Intelligent vehicles Vehicle dynamics Reproducibility of results Runtime environment Virtual environment distributed computing Automotive engineering Decision making

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Signal processing of sensor node data for vehicle detection

Signal processing of sensor node data for vehicle detection

引用

international conference on Intelligent Transportation

作者： J. Ding S.-Y. Cheung C.-W. Tan P. Varaiya Department of Electrical Engineering and Computer Sciences Department of Mechanical Engineering University of California Berkeley CA USA General Electric Research Center Niskayuna NY USA Department of Mechanical Engineering University of California Berkeley CA USA UC-Berkeley Richmond Field Station Richmond CA USA Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA

We describe an algorithm and experimental work for vehicle detection using sensor node data. Both acoustic and magnetic signals are processed for vehicle detection. We propose a real-time vehicle detection algorithm called the adaptive threshold algorithm (ATA). The algorithm first computes the time-domain energy distribution curve and then slices the energy curve using a threshold updated adaptively by some decision states. Finally, the hard decision results from threshold slicing are passed to a finite-state machine, which makes the final vehicle detection decision. Real-time tests and offline simulations both demonstrate that the proposed algorithm is effective.

关键词： Signal processing Vehicle detection Signal processing algorithms Magnetic sensors Acoustic sensors Acoustic signal processing Adaptive signal processing sensor phenomena and characterization distributed computing Time domain analysis

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ContextCube -: Providing context information ubiquitously 23

ContextCube -: Providing context information ubiquitously

引用

23rd international conference on distributed computing systems Workshops

作者： Bauer, M Becker, C Hähner, J Schiele, G Univ Stuttgart IPVS D-70569 Stuttgart Germany

ISBN: (纸本)0769519210

Sensing the state of the environment is an important source for context-aware applications. Several approaches exist to provide sensor information to mobile application nodes. As the extreme cases we have pure infrastructures and pure ad hoc networks. In order to allow sensor platforms to serve both of these approaches, we have designed a universal sensor platform and integrated it into an infrastructure-based approach as well as into ad hoc networks. In this paper we discuss the requirements on such a platform, the design, and the experiences.

关键词： Access protocols Ad hoc networks conferences Context distributed computing Humidity Information retrieval Manufacturing sensor systems and applications Temperature sensors

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Middleware and application adaptation requirements and their support in pervasive computing 23

Middleware and application adaptation requirements and their...

引用

23rd international conference on distributed computing systems Workshops

作者： Becker, C Schiele, G Univ Stuttgart Inst Parallel & Distributed & Syst IPVS D-70569 Stuttgart Germany

ISBN: (纸本)0769519210

Pervasive computing environments are characterized by an additional heterogeneity compared to existing computing infrastructures. Devices ranging from small embedded systems to full-fledged computers are connected via spontaneously formed networks. In this paper we analyze requirements of applications and system software to cope with the dynamically changing execution environment. Based on our micro-broker-based middleware BASE a component framework for pervasive computing supporting application adaptation is proposed.

关键词： Application software Concurrent computing distributed computing Middleware Personal digital assistants Pervasive computing Quality of service Senior citizens sensor systems Temperature sensors

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"Data-centric to the max", the SPLICE architecture experience 23

"Data-centric to the max", the SPLICE architecture experienc...

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23rd international conference on distributed computing systems Workshops

作者： van 't Hag, JH Thales Naval Nederland Netherlands

ISBN: (纸本)0769519210

Over the past 10 years, Thales Naval Nederland (TNN) has successfully applied a pure data-centric architecture called SPLICE in its naval Combat Management systems This fielded architecture provides the essential non-functional properties as demanded in these mission-critical environments such as (real-time) performance, scalability, fault-tolerance and evolve-ability. Thales recently contributed this knowledge and experience in a joint submission regarding the OMG's Data Distribution Service (DDS) for Real-time systems. The SPLICE architecture is characterized by autonomous applications with minimal dependencies where function and interaction are clearly separated and SPLICE-agents act as real-time information brokers. SPLICE thus offers a normalized environment that is designed once for all applications and which delivers 'the right information at the right place at the right time'.

关键词： Control systems distributed computing Environmental management Fault tolerant systems Mission critical systems Real time systems Scalability sensor fusion sensor systems Subscriptions

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Smart dust - Hardware limits to wireless sensor networks

Smart dust - Hardware limits to wireless sensor networks

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23th ieee international conference on distributed computing systems

作者： Pister, Kristofer S.J.

With the MEMS revolution in full swing, microsensors are now following manufacturing curves that are at least related to Moore's Law. Combined with the push for low power communication and computation coming from the handheld community, this enables an exciting new field of low-cost, high-performance wireless sensor networks. This talk will address some of the practical and physical limits associated with miniaturization of wireless sensor networks.

关键词： Microsensors

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