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检索条件"任意字段=6th IEEE International Conference on Distributed Computing in Sensor Systems, DCOSS 2010"

共 258 条记录，以下是171-180 订阅

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Reducing the data transmission in Wireless sensor Networks using the Principal Component Analysis

Reducing the data transmission in Wireless Sensor Networks u...

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2010 6th international conference on Intelligent sensors, sensor Networks and Information Processing, ISSNIP 2010

作者： Rooshenas, Amirmohammad Rabiee, Hamid R. Movaghar, Ali Naderi, M. Yousof Department of Computer Engineering Sharif University of Technology Tehran Iran

ISBN: (纸本)9781424471768

Aggregation services play an important role in the domain of Wireless sensor Networks (WSNs) because they significantly reduce the number of required data transmissions, and improve energy efficiency on those networks. In most of the existing aggregation methods that have been developed based on the mathematical models or functions, the user of the WSN has not access to the original observations. In this paper, we propose an algorithm which let the base station access the observations by introducing a distributed method for computing the Principal Component Analysis (PCA). the proposed algorithm is based on transmission workload of the intermediate nodes. By using PCA, we aggregate the incoming packets of an intermediate node into one packet and as a result, an intermediate node merely sends a packet instead of relaying all the incoming packets. Consequently, we can achieve considerable reduction in data transmission. We have analyzed the performance of the proposed algorithm through numerical simulations. the experimental results show that our algorithm performs better than the existing state of the art PCA-based aggregation algorithms such as PCAg in terms of accuracy and efficiency. © 2010 ieee.

关键词： Data reduction

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Advancement of a sensor Aided Smart Grid Node Architecture 6

Advancement of a Sensor Aided Smart Grid Node Architecture

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6th international conference on Cyber-Enabled distributed computing and Knowledge Discovery (CyberC)

作者： Duchon, Markus Gupta, Pragya Kirti Koss, Dagmar Bytschkow, Denis Schaetz, Berhard Wilzbach, Sebastian Fortiss GmbH D-80805 Munich Germany

ISBN: (纸本)9781479962365

Flexible, extensible and lightweight architectures are necessary to allow the participation of small energy producers in the smart grid. In addition to an intelligent energy management system on top of a home automation system these nodes exchange information with other smart grid nodes to enable services like energy trading or demand side management as well as to establish a stable and scalable smart grid. In order to support future developments in the areas of sensing and metering devices, actuators, production and storage technologies and communication protocols a flexible and extensible design is essential. Besides the mentioned areas the proposed architecture supports a distributed deployment on small and energy-saving computing devices to decrease visibility and energy consumption as much as possible. In the further implementation of the layered approach we distinguish between the core system and functional components. Connected via an enterprise message bus the functional can be implemented using different programming languages and deployed on various networked devices following the SOA principles. the core system includes authentication, configuration, persistent storage and a plug and play registration of functional components. In this paper, the design and functionality of our layered and component based architecture is presented.

关键词： Actuators Computer architecture Containers Protocols sensors Smart grids Smart homes Smart Energy Living Lab Smart Grid System Architecture Smart grids Smart homes Computer Architecture actuators CONTAINERS sensors protocols Building systems ARCHITECTURE Building construction Energy trading

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Data collection for distributed surveillance sensor networks in disaster-hit regions

Data collection for distributed surveillance sensor networks...

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作者： Zhao, Yao Wang, Xin Zhao, Jin Lim, Azman Osman School of Computer Science Fudan University China School of Information Science Japan Advanced Institute of Science and Technology Japan

ISBN: (纸本)9780984589326

the objective of many applications with the surveillance missions in wireless sensor networks is to provide long-term monitoring of the specific environments, such as disaster-hit regions. these applications usually perform continuous monitoring without any maintenance, even if some sensor nodes fail. A significant challenge when designing the data collection approaches for such systems is that the conventional communication protocols for wireless sensor networks would present low efficiency, since the network topology changes rapidly due to the node failure. thus the sensor nodes in such systems should use an automatic transmission approach to disseminate their sensed data to the sink in a distributed manner. In this paper, we propose a novel Coding-based Probabilistic Routing (CPR) to address this specific problem of data collection for distributed surveillance sensor networks in disaster-hit regions. CPR dynamically adapts to node failure to collect the maximum data in any given time and chooses an optimal probabilistic routing to decrease the transmission consumption. the extensive simulation results are presented to show that CPR outperforms other strategies. © 2010 ICST.

关键词： Disasters

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Object-level 3D Semantic Mapping using a Network of Smart Edge sensors 6

Object-level 3D Semantic Mapping using a Network of Smart Ed...

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6th ieee international conference on Robotic computing, (IRC)

作者： Hau, Julian Bultmann, Simon Behnke, Sven Univ Bonn Autonomous Intelligent Syst Bonn Germany

ISBN: (纸本)9781665472609

Autonomous robots that interact with their environment require a detailed semantic scene model. For this, volumetric semantic maps are frequently used. the scene understanding can further be improved by including object-level information in the map. In this work, we extend a multi-view 3D semantic mapping system consisting of a network of distributed smart edge sensors with object-level information, to enable downstream tasks that need object-level input. Objects are represented in the map via their 3D mesh model or as an object-centric volumetric sub-map that can model arbitrary object geometry when no detailed 3D model is available. We propose a keypoint-based approach to estimate object poses via PnP and refinement via ICP alignment of the 3D object model with the observed point cloud segments. Object instances are tracked to integrate observations over time and to be robust against temporary occlusions. Our method is evaluated on the public Behave dataset where it shows pose estimation accuracy within a few centimeters and in real-world experiments with the sensor network in a challenging lab environment where multiple chairs and a table are tracked through the scene online, in real time even under high occlusions.

关键词： Object-level mapping semantic scene understanding intelligent sensors and systems distributed perception

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Towards a scalable and interoperable global environmental sensor network using Service Oriented Architecture

Towards a scalable and interoperable global environmental se...

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2010 6th international conference on Intelligent sensors, sensor Networks and Information Processing, ISSNIP 2010

作者： Motwani, Rakhi Motwani, Mukesh Harris Jr., Frederick Dascalu, Sergiu Computer Science and Engineering Department University of Nevada Reno 1664 North Virginia St. Reno NV 89557-0171 United States

ISBN: (纸本)9781424471768

sensor networks are critical infrastructures for monitoring environmental variables, allowing evaluation of long-term trends and changes in the interaction of atmospheric, ecologic, and hydrologic processes. However, due to lack of coordination between large-scale environmental observation systems that have been set up around the globe, the wealth of information collected by sensor networks is not exploited to its full potential. Since there is no central organization tying these various systems together, data acquisition and dissemination methods are inconsistent and public accessibility to these observation systems is restricted to the methods chosen at the individual project level. the ability to easily discover, access, and interact with observational instruments and use real-time sensory data spread across different environmental observatories is limited. Interoperability of sensor network assets is essential to producing improved projections, models, analyses, and assessments at a global scale. To this end this paper presents the architectural design for a scalable, interoperable and real-time environmental sensor network. the proposed architectural design also provides support for dynamic reconfiguration of sensors in response to changing environmental conditions, and facilitates secure sensor access and delivery of observations to a distributed community of users using standardized mechanisms based on Open Geospatial Consortium standards. the outlined architecture uses an Event-Driven Service Oriented Architecture, with Enterprise Service Bus as its backbone messaging transport layer. © 2010 ieee.

关键词： Service oriented architecture (SOA)

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W-Grid: a cross-layer infrastructure for multi-dimensional indexing, querying and routing. in wireless ad-hoc and sensor networks 6

W-Grid: a cross-layer infrastructure for multi-dimensional i...

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6th international conference on Peer-to-Peer computing (P2P 2006)

作者： Moro, Gianluca Monti, Gabriele Univ Bologna Dept Elect Comp Sci & Syst Viale Venezia 52 I-47023 Cesena Italy

ISBN: (纸本)0769526799

Large scale wireless ad-hoc networks of computers, sensors, PDAs etc. (i.e. nodes) are revolutionizing connectivity and leading to a paradigm shift from centralized systems to highly distributed and dynamic environments. A plethora of routing algorithms have been proposed for the network path discovery ranging from broadcasting/flooding-based approaches to those using global positioning systems (GPS). In this paper we propose a novel decentralized infrastructure that self-organizes wireless devices in an ad-hoc network, where each node has one or more virtual coordinates through which both message routing and data management occur without reliance on either flooding/broadcasting operations or GPS. the resulting ad-hoc network does not suffer from the dead-end problem, which happens in geographic-based routing when a node is unable to locate a neighbor closer to the destination than itself. the multi-dimensional data management capability will be described showing, as an example, how the location service reduces to a simple query, like for any other data type. Extensive performance analysis and experiments have been conducted and the results compared to GPSR, which is considered the most efficient routing solution not using broadcast operations. Our approach shows significant performance gains.

关键词： Information management

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Semantic driven healthcare monitoring and disease detection framework from heterogeneous sensor data 6

Semantic driven healthcare monitoring and disease detection ...

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6th international conference on Parallel, distributed and Grid computing, PDGC 2020

作者： Hooda, Diksha Rani, Rinkle Thapar Institute of Engineering and Technology Computers Science and Engineering Department Patiala India

ISBN: (纸本)9781728171326

As the age profile of various societies keeps going up all over the world, in addition to the continuous surge in the populace suffering from long term illnesses, including diabetes, hypertension, cardiovascular problems, obesity, etc. supporting and providing healthcare services, both physically and mentally, is of utmost importance in order to assure and maintain independent living. So, regular and uninterrupted health monitoring is evidently an assured and functional solution that can methodically deliver health-related services to elderly people and patients. the emergence of the sensor based technologies has given rise to immense possibilities in the domain of healthcare. Also, it has been adopted precisely in the construction and deployment of healthcare systems for effective regular health monitoring, illness diagnosis and further treatment. this paper proposes a semantic driven healthcare framework in which an ontology is developed that conceptualises the process of disease detection on the basis of dynamic sensed clinical data. the proposed system provides semantic interoperability by handling the issue of heterogeneity and promoting exchange of consensual knowledge. Our work designs reasoning rules over the semantic knowledge base for classification and disease detection task. Further, the model is validated by deploying semantic querying to retrieve desired results. the results portray the potential and efficiency of the proposed ontology based system to grow into a more sophisticated approach for healthcare monitoring and treatment. © 2020 ieee.

关键词： Ontology

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OMA: A multi-channel MAC protocol with opportunistic media access in wireless sensor networks

OMA: A multi-channel MAC protocol with opportunistic media a...

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international conference on Mobile Ad-hoc and sensor Networks

作者： Li, Jinbao Zhang, Desheng Guo, Longjiang School of Computer Science and Technology Heilongjiang University Harbin Heilongjiang 150080 China Key Laboratory of Database and Parallel Computing of Heilongjiang Province Harbin Heilongjiang 150080 China

ISBN: (纸本)9780769543154

To tackle control channel saturation problems, this paper proposes OMA, an asynchronous duty cycle based multi-channel MAC protocol with opportunistic media access for wireless sensor networks. By adopting opportunistic media access, OMA effectively alleviates, if not completely eliminates, control channel saturation problems. More importantly, OMA is fully distributed with no requirements of time synchronization or multi-radio. therefore, OMA is very easy to be implemented in resource-constrained sensor nodes. Via the theoretical analysis, the opportunistic probability with which a node opportunistically access the control channel is obtained. To validate the effectiveness of opportunistic media access, extensive simulations and real testbed experiments were conducted. the simulation and experimental results show that when the number of channels is large or the network loads are heavy, OMA improves energy efficiency and throughput significantly compared with other works in the literature. © 2010 ieee.

关键词： sensor nodes

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Automatic damaged-function alternation among wireless sensor nodes

Automatic damaged-function alternation among wireless sensor...

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作者： Miyazaki, Toshiaki Shitara, Daiki Graduate School of Computer and Information Systems University of Aizu Aizu-Wakamartsu Fukushima 965-8580 Japan

ISBN: (纸本)9788988678251

We propose a distributed algorithm for function alternations, which enables sensor nodes to take over the damaged functions of their neighboring sensor nodes dynamically in a wireless sensor network. In this paper, after introducing the concept of the function alternation, the algorithm is explained in detail with some evaluation results. Comparing the results obtained using the proposed algorithm with those obtained using non-function alternation methods shows that the proposed algorithm makes the initial functionality of each sensor function sustainable even if some sensor nodes are damaged.

关键词： sensor nodes

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A state-space search approach for optimizing reliability and cost of execution in distributed sensor networks 1

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7th international Workshop on distributed computing, IWDC 2005

作者： Sekhar, Archana Manoj, B.S. Siva Ram Murthy, C. McKinsey and Company Mumbai 400 021 India Department of Electrical and Computer Engineering University of California at San Diego San Diego CA 92093 United States Department of Computer Science and Engineering Indian Institute of Technology Madras Chennai 600 036 India

ISBN: (数字)9783540324287

ISBN: (纸本)3540309594

sensor networks are increasingly being used for applications which require fast processing of data, such as multimedia processing. distributed computing can be used on a sensor network to reduce the completion time of a task and distribute the energy consumption equitably across all sensors. the distribution of task modules to sensors should consider not only the time and energy savings, but must also improve reliability of the entire task execution. We formulate the above as an optimization problem, and use the A* algorithm with improvements to determine an optimal static allocation of modules among a set of sensors. We also suggest a faster but suboptimal algorithm, called the greedy A* algorithm. Both algorithms have been simulated, and the results have been compared in terms of energy savings, decrease in completion time of the task, and the deviation of the sub-optimal solution from the optimal one. the sub-optimal solution required 8-35% less computation, at the cost of 2.5-15% deviation from the optimal solution in terms of average energy spent per sensor node. Both the A* and greedy A* algorithms have been shown to distribute energy consumption more uniformly across sensors than centralized execution. the greedy A* algorithm is found to be scalable, as the number of evaluations in determining the allocation increases linearly with the number of sensors. © Springer-Verlag Berlin Heidelberg 2005.

关键词： distributed computer systems

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