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A Hilbert Curve-Based distributed Index for Window Queries in Wireless Data Broadcast systems

A Hilbert Curve-Based Distributed Index for Window Queries i...

引用

ieee international conference on sensor Networks, Ubiquitous, and Trustworthy computing

作者： Jun-Hong Shen Ye-In Chang Department of Computer Science and Engineering National Sun Yat-Sen University Kaohsiung Taiwan

ISBN: (纸本)9780769531588;9780769534114

Location-dependent spatial query in the wireless environment is that mobile users query the spatial objects dependent on their current location. The window query is one of the essential spatial queries, which finds spatial objects located within a given window. In this paper, we propose a Hilbert curve-based distributed index for window queries in the wireless data broadcast systems. Our proposed algorithm allocates spatial objects in the Hilbert-curve order to preserve the spatial locality. Moreover, to quickly answer window queries, our proposed algorithm utilizes the neighbor-link index, which has knowledge about neighbor objects, to return the answered objects. From our experimental study, we have shown that our proposed algorithm outperforms the distributed spatial index.

关键词： Broadcasting Neural networks Spatial indexes Wireless sensor networks sensor systems Computer networks distributed computing Pervasive computing Computer science Data engineering

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distributed situation assessment for intelligent sensor networks based on hierarchical fuzzy cognitive maps

Distributed situation assessment for intelligent sensor netw...

引用

ieee international conference on systems, Man and Cybernetics

作者： Sandeep Chandana Henry Leung Department of Electrical & Computer Engineering University of Calgary Calgary AB Canada

A distributed situation assessment framework based on hierarchical fuzzy cognitive maps has been developed for intelligent sensor network. This intelligent distributed sensor work is aimed for large volume coastal surveillance objectives. The proposed system has been applied to scenarios involving missing information, conflicting information and for cooperative situation assessment.

关键词： Intelligent sensors Fuzzy cognitive maps Surveillance Sea measurements System testing Computer networks distributed computing Uncertainty Fusion power generation sensor fusion

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Security Enforcement Model for distributed Usage Control

Security Enforcement Model for Distributed Usage Control

引用

ieee international conference on sensor Networks, Ubiquitous, and Trustworthy computing

作者： Xinwen Zhang Jean-Pierre Seifert Ravi Sandhu Samsung Information Systems America Inc. San Jose CA USA Institute for Cyber Security University of Texas San Antonio USA

ISBN: (纸本)9780769531588;9780769534114

Recently proposed usage control concept and models extend traditional access control models with features for contemporary distributed computing systems, including continuous access control in dynamic computing environments where subject attributes and system states can be changed. Particularly, this is very useful in specifying security requirements to control the usage of an object after it is released into a distributed environment, which is regarded as one of the fundamental security issues in many distributed systems. However, the enabling technology for usage control is a challenging problem and the space has not been fully explored yet. In this paper we identify the general requirements of a trusted usage control enforcement in heterogeneous computing environments, and then propose a general platform architecture and enforcement mechanism by following these requirements. According to our usage control requirements, we augment the traditional SELinux MAC enforcement mechanism by considering subject/object integrity and environmental information. The result shows that our framework is effective in practice and can be seen as a general solution for usage control in distributed and pervasive computing environments with widely deployed trusted computing technologies on various computing devices.

关键词： distributed control Access control distributed computing Pervasive computing Information security Control systems Computer networks Space technology Protection Identity management systems

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Energy efficient selection of computing elements in wireless sensor networks

Energy efficient selection of computing elements in wireless...

引用

2nd international conference on sensor Technologies and Applications, sensorCOMM 2008

作者： Corroy, Steven Beiten, Jan Ansari, Junaid Baldus, Heribert Mähönen, Petri Philips Research Distributed Sensor Systems HTC 37-51 NL-5656AE Eindhoven Netherlands Department of Wireless Networks RWTH Aachen University Kackertstrasse 9 D-52072 Aachen Germany

ISBN: (纸本)9780769533308

A wide range of wireless sensor network applications are characterized by local processing of the sensed data and only meager data communication requirements. Indeed, because sensor nodes are battery powered and wireless communication bears a high energy cost, data transmission can be traded for on-the-node computation to extend node and network lifetime. Furthermore, the energy consumption can be reduced significantly by selecting and realizing the application on an appropriate processing element. In this article, we propose a new statistical technique for energy consumption estimation for a specific application on various platforms. We have empirically verified the methodology on various classes of embedded processors commonly used in sensor nodes. The methodology can also be applied to multiprocessor platforms. Our solution is not only capable to achieve high accuracy but also facilitates the application developer to evaluate different platforms without actually implementing the application on each of these platforms. Our experimental evaluation results for various platforms will help to understand the implications of using different processing elements and their effects on the lifetime of the network. © 2008 ieee.

关键词： sensor nodes

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CME: A Contour Mapping Engine in Wireless sensor Networks

CME: A Contour Mapping Engine in Wireless Sensor Networks

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ieee international conference on distributed computing systems

作者： Yingqi Xu Wang-Chien Lee Gail Mitchell The Pennsylvania State University University Park PA 16802 USA

ISBN: (纸本)9781424431748

Contour maps, showing topological distribution of extracted features, are crucial for many applications. Building a dynamic contour map in a wireless sensor network is a challenging task due to the constrained network resources. In this paper, we present the design of a contour mapping engine (CME) in wireless sensor networks. Our design incorporates in-network processing based on binary classification to reduce the total number of active nodes. The underlying network architecture is analyzed to derive an optimal configuration. We show, by extensive simulations, the superiority of CME over the state-of-the-art contour mapping techniques.

关键词： Wireless sensor networks CONTOUR MAP coronal mass ejection contour optimal configuration Web resources NETWORK STRUCTURE MAPPING(MATHEMATICAL) Engines

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Communications via systems-on-Chips Clustering in Large-Scaled sensor Networks

Communications via Systems-on-Chips Clustering in Large-Scal...

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ieee/IFIP international conference on Embedded and Ubiquitous computing, EUC

作者： Sharon Fan Jeffrey Fan Kia Makki Nikki Pissinou Department of Electrical and Computer Engineering Florida International University Miami FL USA

In this paper, we have proposed a framework of systems-on-chips clustering in application to complicated sensor networks. The framework can be applied to address the communication issues in distributed and large-scaled sensor nodes in wireless sensor network application. There are two communication categories under consideration, i.e. intra-nodes and inter-nodes. Due to the potentially higher frequency in the signal propagation within the sensor node, the characteristics of the interconnect among various systems-on-chips cannot be described in the traditionally lumped R, L, C components. We adapt a distributed transmission line model to address such issues and possibly improve the reliability in the intra-nodes communication. Furthermore, based on the bandwidth requirements of each sensor node, the large-scaled senor network is proposed to be transformed into a maze diagram by a user defined threshold bandwidth, so that many existing approaches may be applied to determine the routing paths in the inter-nodes communication to improve the efficiency of the overall network.

关键词： sensor systems Frequency sensor phenomena and characterization Transmission lines sensor systems and applications Application software Wireless sensor networks Bandwidth Routing Temperature sensors

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A Constant Factor Localized Algorithm for computing Connected Dominating Sets in Wireless sensor Networks

A Constant Factor Localized Algorithm for Computing Connecte...

引用

international conference on Parallel and distributed systems (ICPADS)

作者： Kamrul Islam Selim G. Akl Henk Meijer School of Computing Queen''s University Kingston ONT Canada

Connected dominating sets (CDSs) are probably the most common way of constructing virtual backbones for broadcasting operation in wireless sensor networks. This is because such backbones guarantee to reduce unnecessary message transmissions or flooding in the network. In this paper we propose a simple localized algorithm to construct a small-sized CDS. Considering the sensors deployed in the plane, our main idea is based on the computation of convex hulls of sensor nodes (nodes are considered points in the plane) in a localized manner and a simple coloring scheme, which produces a CDS in unit disk graphs whose size is at most 38*|MCDS| where |MCDS| is the size of a minimum CDS. To the best of our knowledge, this is a significant improvement over the best published results in the same context [5]. We also analyze grids and trees to compute the exact approximation ratios for the problem. We show that our algorithm produces an optimal CDS if the graph is a tree and in the case of grids the approximation factor is 2.

关键词： Computer networks Wireless sensor networks Spine Connectors Tree graphs Concurrent computing distributed computing Broadcasting Grid computing Approximation algorithms

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Towards Scalable Deployment of sensors and Actuators for Industrial Applications

Towards Scalable Deployment of Sensors and Actuators for Ind...

引用

ieee international conference on sensor Networks, Ubiquitous, and Trustworthy computing

作者： Han Chen Paul Chou Hao Yang IBM Thomas J. Watson Research Center Hawthorne NY USA

ISBN: (纸本)9780769531588;9780769534114

While electronic sensors and actuators have a long history of being used for a broad variety of industrial applications, these applications tend to be self-contained, for example, to control a process or to automate an operation. The recent technology advancements in ubiquitous connectivity and distributed computing have afforded improved business performance or novel business models by narrowing the gap between the real-world conditions and the state of business information systems with sensors and actuators seamlessly integrated in critical business processes. This paper first describes three industry examples to motivate and discuss the key challenges for the ubiquitous applications of sensors and actuators. In particular, it argues for the need of an architecture that promotes component assembly for deployment scalability and supports application-specific QoS requirements such as timeliness, reliability and security. The paper also describes a prototype solution to illustrate our approach and progress.

关键词： Actuators Industrial electronics History Electronics industry Industrial control Automatic control Process control distributed computing Information systems sensor systems

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distributed Coordinate-Free Hole Recovery

Distributed Coordinate-Free Hole Recovery

引用

ieee international conference on Communications Workshops, ICC

作者： X. Li D. K. Hunter Department of Computing and Electronic Systems University of Essex Colchester UK

This paper proposes a distributed coordinate-free non-triangulated hole recovery algorithm for sensor networks called 3MeSH-DR (triangular mesh distributed hole recovery), which recovers coverage holes with the minimum number of redundant nodes using only connectivity information. If this hole cannot be triangulated by edges between pairs of nodes closer that 2 units from each other, the boundary of the hole is detected accurately with the minimum number of edges. It is shown to be error-free by thousands of simulations with different random topologies and node densities. Because of its high reliability and modest requirements for computing power and memory, 3MeSH-DR is an efficient solution for hole detection and recovery without location information in real sensor network applications.

关键词： Peer to peer computing Detection algorithms Partitioning algorithms Wireless sensor networks Computer networks Network topology Nominations and elections Communications Society conferences distributed computing

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Mobility-assisted Spatiotemporal Detection in Wireless sensor Networks

Mobility-assisted Spatiotemporal Detection in Wireless Senso...

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ieee international conference on distributed computing systems

作者： Guoliang Xing Jianping Wang Ke Shen Qingfeng Huang Xiaohua Jia Hing Cheung So Department of Computer Science City University of Hong Kong

ISBN: (纸本)9781424431748

Wireless sensor networks (WSNs) deployed for mission-critical applications face the fundamental challenge of meeting stringent spatiotemporal performance requirements using nodes with limited sensing capacity. Although advance network planning and dense node deployment may initially achieve the required performance, they often fail to adapt to the unpredictability of physical reality. This paper explores efficient use of mobile sensors to address the limitations of static WSNs in target detection. We propose a data fusion model that enables static and mobile sensors to effectively collaborate in target detection. An optimal sensor movement scheduling algorithm is developed to minimize the total moving distance of sensors while achieving a set of spatiotemporal performance requirements including high detection probability, low system false alarm rate and bounded detection delay. The effectiveness of our approach is validated by extensive simulations based on real data traces collected by 23 sensor nodes.

关键词： Wireless sensor networks Object detection sensors Data fusion Ganglia observational data Network planning

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