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4th Annual International ICST Conference on Ad Hoc Networks (AdHocNets)

作者： Azim, Mohammad Abdul Aung, Zeyar Xiao, Weidong Khadkikar, Vinod Masdar Inst Sci & Technol Abu Dhabi U Arab Emirates

ISBN: (纸本)9783642369582;9783642369575

Wireless sensor network (WSN) localization technique remains an open research issue due to its challenges on reducing location estimation error and cost of localization algorithm itself. For a large mobile network localization cost becomes increasingly important due to the exponential increment of algorithmic cost. Conversely, sacrificing localization accuracy to a great extent is not acceptable at all. To address the localization problem of wireless sensor network this paper presents a novel algorithm based on cross-entropy (CE) method. The proposed centralized algorithm estimates location information of the nodes based on the measured distances of the neighboring nodes. The algorithm minimizes the estimated location error by using CE method. Simulation results compare the proposed CE approach with DV-Hop and simulated annealing (SA)-based localizations and show that this approach provides a balance between the accuracy and cost.

关键词： wireless sensor networks localization algorithms cross-entropy method

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RF localization for Wireless Video Capsule Endoscopy

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INTERNATIONAL JOURNAL OF WIRELESS INFORMATION NETWORKS 2012年第4期19卷 326-340页

作者： Pahlavan, K. Bao, G. Ye, Y. Makarov, S. Khan, U. Swar, P. Cave, D. Karellas, A. Krishnamurthy, P. Sayrafian, K. Worcester Polytech Inst Elect & Comp Engn Worcester MA 01609 USA Worcester Polytech Inst Comp Sci Worcester MA 01609 USA Worcester Polytech Inst Ctr Wireless Informat Network Studies Worcester MA 01609 USA Worcester Polytech Inst Dept Elect & Comp Engn Worcester MA 01609 USA Worcester Polytech Inst Dept Elect Engn Worcester MA 01609 USA Univ Massachusetts Sch Med Med Worcester MA USA Univ Massachusetts Sch Med Radiol Worcester MA USA Univ Massachusetts Sch Med Radiol Phys Worcester MA USA Univ Pittsburgh Sch Informat Sci Pittsburgh PA USA NIST Informat Technol Lab Gaithersburg MD 20899 USA

RF localization science and technology started with the global positioning systems for outdoor areas, and it then transformed into wireless indoor geolocation. The next step in the evolution of this science is the transformation into RF localization inside the human body. The first major application for this technology is the localization of the wireless video capsule endoscope (VCE) that has been in the clinical arena for 12 years. While physicians can receive clear images of abnormalities in the gastrointestinal tract with VCE devices, they have little idea of their exact location inside the GI tract. To localize intestinal abnormalities, physicians routinely use radiological, endoscopic or surgical operations. If we could use the RF signal radiated from the capsule to also locate these devices, not only can physicians discover medical problems, but they can also learn where the problems are located. However, finding a realistic RF localization solution for the endoscopy capsule is a very challenging task, because the inside of the human body is a difficult environment for experimentation and visualization. In addition, we have no-idea how the capsule moves and rotates in its 3D journey in this non-homogeneous medium for radio propagation. In this paper, we describe how we can design a cyber physical system (CPS) for experimental testing and visualization of interior of the human body that can be used for solving the RF localization problem for the endoscopy capsule. We also address the scientific challenges that face and the appropriate technical approaches for solving this problem.

关键词： Capsule endoscopy In-body radio propagation localization algorithms Security and reliability Virtual visualization Gastrointestinal tract Body area networks Sensor networks

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A Linear Method for TDOA Estimation of Frequency-hopping Signal

A Linear Method for TDOA Estimation of Frequency-hopping Sig...

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8th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM)

作者： Wang, Jun Xu, Yang Xu, Peng Southwest Jiaotong Univ Intelligent Control Dev Ctr Chengdu Sichuan Provinc Peoples R China

ISBN: (纸本)9781612846835

A linear method for TDOA estimation of frequency-hopping signal is proposed in this paper, which can provide high-precision positioning for frequency hopping signal and fast TDOA estimation. First, according to the carrier frequency and the signal bandwidth in a frequency hopping cycle, the frequency hopping signal is filtered, and perform the Hilbert transform of a frequency hopping cycle, then the Hilbert transform results were to determine the phase difference. By a number of frequency hopping cycle phase sequence of linear equations, the corresponding solution determines the frequency hopping signal TDOA estimation. The analysis and simulations demonstrate the effectiveness of the proposed method, which can get more high precision of TDOA estimate with several frequency hopping cycles.

关键词： frequency-hopping signal TDOA estimation localization algorithms linear method

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Toward the Deployment of an Ultra-Wideband localization Test Bed

Toward the Deployment of an Ultra-Wideband Localization Test...

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IEEE 74th Vehicular Technology Conference (VTC)

作者： Feldman, Alexander Bahr, Alexander Colli-Vignarelli, James Robert, Stephan Dehollain, Catherine Martinoli, Alcherio Institute for Information and Communication Technologies Haute Ecole d'Ingénierie et de Gestion du Canton de Vaud (HEIG-VD) Switzerland Distributed Intelligent Systems and Algorithms Laboratory Ecole Polytechnique Fédérale de Lausanne (EPFL) Switzerland Radio Frequency Integrated Circuit Group Ecole Polytechnique Fédérale de Lausanne (EPFL) Switzerland

ISBN: (纸本)9781424483273

The design, development, and deployment of Ultra-Wideband (UWB) localization systems involves digital and Radio-Frequency (RF) hardware, embedded software, localization algorithms, security and reliability aspects, electromagnetics, and others. Design and integration decisions affect the performance of an UWB system, in particular the most important metrics: localization accuracy and position update rate. To facilitate further development of UWB localization systems and to analyze some of the major trade-offs we share our experience in deploying the EPFL UWB-Lite test bed (U-LITE). We describe an approach to numerical simulation modeling that can help in the design and evaluation of UWB localization systems. To validate our approach we show experimental results with one transmitter and one receiver. Our UWB test bed includes a mobile robot platform, so we can study and evaluate the UWB performance trade-offs in real-world conditions.

关键词： Accuracy Demodulation Radio frequency Radio transmitters Receivers Robots electromagnetic waves electromagnetics embedded software embedded systems localization algorithms position update rate radiofrequency hardware real world conditions ultra wideband c

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A Survey of Agent Technologies for Wireless Sensor Networks

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IETE TECHNICAL REVIEW 2011年第2期28卷 168-184页

作者： Dagdeviren, Orhan Korkmaz, Ilker Tekbacak, Fatih Erciyes, Kayhan Izmir Inst Technol Dept Comp Engn TR-35430 Urla Turkey Izmir Univ Econ Dept Comp Engn TR-35330 Balcova Turkey Izmir Univ TR-35350 Izmir Turkey

Wireless sensor networks (WSNs) do not have a fixed infrastructure and consist of sensor nodes that perform sensing and communicating tasks. The WSNs have large application spectrum such as habitat monitoring, military surveillance, and target tracking, where sensor nodes may operate distributed in highly dynamic environments. Battery-constrained sensor nodes may aggregate the sensed data, localize themselves, and route the packets in an energy-efficient and decentralized manner to enable running the applications. Agents are capable of independent and autonomous action, so that they can successfully carry out tasks that have been delegated to them, thus agent-based approaches are very suitable to apply as the solution of the problems occurring in WSNs. So far many agent-based approaches were proposed for WSNs. This paper surveys the agent technologies for sensor networks by providing a classification, objectives and costs of these approaches with the open research problems. To the best of our knowledge, this is the first study that covers the intersection of the agent technology and sensor networks from a wide perspective.

关键词： Agent middlewares Communication protocols Data sampling algorithms Energy harvesting algorithms localization algorithms Mobile software agents Mobile hardware agents Multi-agent systems Task assignment algorithms Wireless sensor networks

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Network localization procedures for experimental evaluation of mobile spatial coordinate measuring system (MScMS)

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INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 2010年第9-12期48卷 859-870页

作者： Mastrogiacomo, Luca Maisano, D. Politecn Torino DISPEA Turin Italy

Large scale metrology refers to dimensional measurement of objects or features of perhaps a ten of meters or more in size. Alternatively, large scale metrology could be said to apply to any dimensional measurement where the metrology instrument has to be brought to the object rather than vice versa. Recent approaches seem to turn their attention towards distributed metrology systems made of multiple components with small dimensions spread around the measuring area. In general, these components are able to form a wireless network of sensors that allows rapid dimensional measurements to be performed in relation to large-size objects, with typical dimensions of several decametres. The portability, flexibility, and ease of installation of wireless sensor networks (WSNs) make these systems attractive for many industries manufacturing large scale products. This paper proposes different WSN localization procedures designed for the mobile spatial coordinate measuring system, a distributed metrology system developed at the industrial metrology and quality laboratory of DISPEA-Politecnico di Torino.

关键词： localization algorithms Mobile metrology system Wireless sensor networks Dimensional measurements MScMS

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localization in Cooperative Wireless Sensor Networks: A Review

Localization in Cooperative Wireless Sensor Networks: A Revi...

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13th International Conference on Computer Supported Cooperative Work in Design

作者： Bal, Mert Liu, Min Shen, Weiming Ghenniwa, Hamada CNR Ctr Comp Assisted Construct Technol Ottawa ON Canada Univ Western Ontario Dept Elect & Comp Engn London ON Canada Tongji Univ Sch Elect & Informat Engn Shanghai Peoples R China

ISBN: (纸本)9781424435340

localization in Wireless Sensor Networks has become a significant research challenge, attracting many researchers in the past decade. This paper provides a review of basic techniques and the state-of-the-art approaches for wireless sensors localization. The challenges and future research opportunities are discussed in relation to the design of the collaborative workspaces based on cooperative wireless sensor networks.

关键词： Wireless Sensor Networks localization algorithms Cooperation Collaborative Workspaces

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On-line diagnostics in the Mobile Spatial coordinate Measuring System (MScMS)

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PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY 2009年第4期33卷 408-417页

作者： Franceschini, Fiorenzo Galetto, Maurizio Maisano, Domenico Mastrogiacomo, Luca Politecn Torino DISPEA I-10129 Turin Italy

Mobile Spatial coordinate Measuring System (MScMS) is a wireless-sensor-network based system developed at the industrial metrology and quality engineering laboratory of DISPEA - Politecnico di Torino. It has been designed to perform simple and rapid indoor dimensional measurements of large-size volumes (large-scale metrology). It is made up of three basic parts: a "constellation" of wireless devices (Crickets), a mobile probe, and a PC to store and elaborate data. Crickets and mobile probe utilize ultrasound (US) transceivers in order to evaluate mutual distances. The system makes it possible to calculate the position - in terms of spatial coordinates - of the object points "touched" by the probe. Acquired data are then available for different types of elaboration (determination of distances, curves or surfaces of measured objects). In order to protect the system against causes of error such as, for example, US signal diffraction and reflection, external uncontrolled US sources (key jingling, neon blinking, etc.), or software non-acceptable solutions, MScMS implements some statistical tests for on-line diagnostics. Three of them are deeply analyzed in this paper: "energy model-based diagnostics", "distance model-based diagnostics", and "sensor physical diagnostics". For each measurement, if all these tests are satisfied at once, the measured result may be considered acceptable with a specific confidence coefficient. Otherwise, the measurement is rejected. After a general description of the MScMS, the paper focuses on the description of these three online diagnostic tools. Some preliminary results achieved by the system prototype are also presented and discussed. (C) 2008 Elsevier Inc. All rights reserved.

关键词： Mobile measuring system Coordinate metrology Dimensional measurements Large-scale metrology Wireless-sensor-networks localization algorithms On-line diagnostics

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Extracting High-Level Information from Location Data: The W4 Diary Example

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MOBILE NETWORKS & APPLICATIONS 2009年第1期14卷 107-119页

作者： Castelli, Gabriella Mamei, Marco Rosi, Alberto Zambonelli, Franco Univ Modena & Reggio Emilia Dipartimento Sci & Metodi Ingn I-42100 Reggio Emilia Italy

Services for mobile and pervasive computing should extensively exploit contextual information both to adapt to user needs and to enable autonomic behavior. To fulfill this idea it is important to provide two key tools: a model supporting context-data representation and manipulation, and a set of algorithms relying on the model to perform application tasks. Following these lines, we first describe the W4 context model showing how it can represent a simple yet effective framework to enable flexible and general-purpose management of contextual information. In particular, we show the model suitability in describing user-centric situations, e.g., describing situations in terms of where a user is located and what he is doing. Then, we illustrate a set of algorithms to semantically enrich W4 represented data and to extract relevant information from it. In particular, starting from W4 data, such algorithms are able to identify the places that matter to the user and to describe them semantically. Overall, we show how the context-model and the algorithms allow to create an high-level, semantic and context-aware diary-based service. This service meaningfully collects and classifies the user whereabouts and the places that the user visited.

关键词： pervasive computing context-awareness W4 model knowledge engineering location-aware services localization algorithms

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Collaborative Signal and Information Processing in Wireless Sensor Networks: a Review

Collaborative Signal and Information Processing in Wireless ...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Bal, Mert Shen, Weiming Ghenniwa, Hamada CNR Ctr Comp Assisted Construct Technol London ON Canada Univ Western Ontario Dept Elect & Comp Engn London ON Canada

ISBN: (纸本)9781424427932

Wireless Sensor Networks (WSN) have become a significant research challenge, attracting many researchers. This paper provides an overview of collaborative WSN, reviewing the algorithms, techniques and state-of-the-art developed so far. We discuss the research challenges and opportunities in this area. The major focus is given to cooperative signal and information processing in collaborative WSN in order to expose important constraints in wireless applications which require distributed computing, such as node localization, target detection and tracking. In this paper, we also present and discuss the applications of multi-agent systems into WSN as a core technology of cooperative information processing.

关键词： wireless sensor networks collaborative information processing cooperation signal processing localization algorithms

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