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

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VisDSI: Locality Aware I/O Solution for Large Scale Data Visualization

VisDSI: Locality Aware I/O Solution for Large Scale Data Vis...

引用

ieee international conference on Utility and Cloud computing (UCC)

作者： Willie Ng Yang Yu Yongqing Zhu Jun Wang Samsudin Juniarto Zhixiang Li Jie Chen A*STAR (Agency for Science Technology and Research) Data Storage Institute Singapore Department of Electrical Engineering and Computer Science University of Central Florida USA

the computational science community is approaching petascale level simulations that will produce massive amount of datasets. While the computational power of supercomputers keep increasing, the I/O systems have not kept pace, resulting in a significant performance bottle neck. We propose a solution, VisDSI, to address the problem by 1) using traditional high performance clusters with disks directly attached within each node, 2) deploying a data-intensive distributed file system on the cluster, and 3) developing a POSIX-compatible I/O layer to enable the traditional visualization applications to smoothly port to this new platform as well as to provide a new I/Osemantic of retrieving the data location with respect to the POSIX standards. In particular, VisDSI guarantees the colocated compute and data storage by introducing a scheduling of work assignments to nodes with local copies of needed data. Compared with the original visualization application, our solution runs at least 10 times faster.

关键词： Data visualization Libraries Scheduling algorithms Bandwidth Dynamic scheduling distributed databases XML

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sensor Virtualization for Enabling Novel Services

Sensor Virtualization for Enabling Novel Services

引用

ieee international conference on Intelligent Data Acquisition and Advanced computing systems

作者： Oana Chenaru Cristina Elena Hanganu Dan Popescu Loretta Ichim University POLITEHNICA of Bucharest

ISBN: (纸本)9781728140704

the paper presents a model for the virtualization of a wireless sensor network in a smart home application for energy consumption monitoring. By correlating physical sensor data with information on home's design, sunrise and sunset time according to day of year, time of day and weather data, novel services for consumed power statistics and efficiency of use of natural light were developed in the virtualized environment. Based on this model, distributed applications were developed to implement analysis of energy consumption over large scale areas. We detail the solution implementation based on the OpenSHS simulator and NodeRed.

关键词： distributed applications Energy consumption monitoring Smart home application sensor virtualization energy consumption analysis Virtualization Wireless sensor networks SUNRISE Sunlight Legal Services Homes Power consumption physical sensor smart dust application energy consumption Enabling

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POS: A Practical Order Statistics Service forWireless sensor Networks

POS: A Practical Order Statistics Service forWireless Sensor...

引用

international conference on distributed computing systems

作者： L.P. Cox M. Castro A. Rowstron Duke University USA Microsoft Research Limited Cambridge UK

We present the design and implementation of POS, an in-network service that computes accurate order statistics energy-efficiently. POS returns a stream of periodic samples from any order statistic. It initially computes the value of the order statistic and then periodically runs a validation protocol to determine whether the value is still valid. If not, it uses an optimized binary search to determine the new value and then resumes periodic validation. POS uses in-network aggregation and transmission suppression to reduce communication complexity. Results from both experiments on a mote testbed and simulations show that POS can compute order statistics accurately while consuming less energy than the best techniques to compute averages in common cases.

关键词： Statistics Complexity theory Base stations Protocols Wireless sensor networks sensor phenomena and characterization Computer networks Batteries Statistical distributions Energy efficiency

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GMP: distributed Geographic Multicast Routing in Wireless sensor Networks

GMP: Distributed Geographic Multicast Routing in Wireless Se...

引用

international conference on distributed computing systems

作者： Shibo Wu K.S. Candan Department of Computer Science Arizona State University Tempe AZ USA

In this paper, we propose a novel Geographic Multicast routing Protocol (GMP) for wireless sensor networks1. the proposed protocol is fully distributed and stateless. Given a set of the destinations, the transmitting node first constructs a virtual Euclidean Steiner tree rooted at itself and including the destinations, using a novel and highly efficient reduction ratio heuristic (called rrSTR). Based on this locally computed tree and the information regarding the locations of its immediate neighbors, the transmitting node then splits the destinations into a set of groups and calculates a next hop for each of these groups. A copy of the packet and the locations of the corresponding group of destination nodes are directed towards the corresponding hop. the simulation results on NS2 show that the average per-destination hop count obtained using GMP is comparable to the existing PBM [21] algorithm and significantly less than obtained by using LGS [5]. Most significantly, GMP requires 25% less hops and energy than alternative algorithms.

关键词： Intelligent networks Wireless sensor networks Multicast protocols Routing protocols Tree graphs Multicast algorithms Unicast Bandwidth Computer science Electronic mail

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Exploring the Energy-Latency Trade-Off for Broadcasts in Energy-Saving sensor Networks

Exploring the Energy-Latency Trade-Off for Broadcasts in Ene...

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international conference on distributed computing systems

作者： M.J. Miller C. Sengul I. Gupta Department of Computer Science University of Illinois Urbana-Champaign USA

Networking protocols for multi-hop wireless sensor networks (WSNs) are required to simultaneously minimize resource usage as well as optimize performance metrics such as latency and reliability. this paper explores the energy-latency-reliability trade-off for broadcast in multi-hop WSNs, by presenting a new protocol called PBBF (probability-based broadcast forwarding). PBBF works at the MAC layer and can be integrated into any sleep scheduling protocol. For a given application-defined level of reliability for broadcasts, the energy required and latency obtained are found to be inversely related to each other. Our analysis and simulation study quantify this relationship at the reliability boundary, as well as performance numbers to be expected from a deployment. PBBF essentially offers a WSN application designer considerable flexibility in choice of desired operation points

关键词： Broadcasting Wireless sensor networks Delay Wireless application protocol Spread spectrum communication Measurement Media Access Protocol Sleep Performance analysis Analytical models

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infer: A Bayesian Inference Approach towards Energy Efficient Data Collection in Dense sensor Networks

infer: A Bayesian Inference Approach towards Energy Efficien...

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international conference on distributed computing systems

作者： G. Hartl Baochun Li Department of Electrical and Computer Engineering University of Toronto Canada

In this paper, we propose a novel approach for efficiently sensing a remote field using wireless sensor networks. Our approach, the infer algorithm, is fully distributed, has low overhead and saves considerable energy compared to using just the data aggregation communication paradigm. this is accomplished by using a distributed algorithm to put nodes into sleep mode for a given period of time, thereby trading off energy usage for the accuracy of the data received at the sink. Bayesian inference is used to infer the missing data from the nodes that were not active during each sensing epoch. As opposed to other methods that have been considered, such as wavelet compression and distributed source coding, our algorithm has lower overhead in terms of both inter-node communication and computational complexity. Our simulations show that on average our algorithm produces energy savings of 59% while still maintaining data that is accurate to within 7.9%. We also show how the parameters of the algorithm may be tuned to optimize network lifetime for a desired level of data accuracy

关键词： Bayesian methods Energy efficiency Intelligent networks Wireless sensor networks Source coding Large-scale systems Temperature sensors Batteries distributed algorithms Inference algorithms

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Distance based Multi Single Hop Low Energy Adaptive Clustering Hierarchy (MS LEACH) Routing Protocol in Wireless sensor Network

Distance based Multi Single Hop Low Energy Adaptive Clusteri...

引用

ieee international Advance computing conference

作者： Takhellambam Sonamani Singh Ranbir Soram Ajoy Kumar Khan Manipur Institute of Technology Assam University Silchar

ISBN: (纸本)9781467382878

the basic objective of Wireless sensor Network are to strengthen the network life time by using the energy efficiently which are available in every nodes of the system. In this paper, Distance based Multi Single Hop Low Energy Adaptive Clustering Hierarchy (MS LEACH) protocol for Wireless sensor Network is being introduced to better the safety area of the network which finally increases the survivability of the system with energy usage efficiently. It is build upon the span between cluster head (CH) and node (sink) to either go for single or Multi hop communication. Finally, the result of our simulation depicts that MS LEACH out-performed the existing system LEACH protocol.

关键词： Wireless sensor network Network life time Heterogeneity Clustering Stable region Residual energy Cluster head Sink node

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A novel method of P2P hosts detection based on flexible neural tree

A novel method of P2P hosts detection based on flexible neur...

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6th international conference on Intelligent systems Design and Applications (ISDA 2006)

作者： Chen, Zhenxiang Wang, Haiyang Peng, Lizhi Yang, Bo Chen, Yuehui Shandong Univ Sch Comp Sci & Technol Jinan 250100 Shandong Prov Peoples R China Jinan Univ Sch Informat Engn Jinan Shandong Peoples R China

ISBN: (纸本)0769525288

It is estimated that 70 percent or more of broadband bandwidth is consumed by transporting music, games, video, and other content through P2P clients. In order to identify, and manage of P2P traffic, some port, payload and connection features based methods were proposed But most of them focus on identifying P2P traffic based on rules and most of them can't identify P2P traffic with new features. None of the proposed methods can effectively help controlling and managing the P2P hosts. In this paper, we created a new P2P feature set, which include most of the proposed and new P2P features proposed by us. And a new anormaly detection method based on the feature set and flexible neural tree (FNT) is applied to detect P2P hosts. this approach is the first intelligent P2P hosts detection method Experimental results show that the new method proposed by this paper has high detection performance and good expansion ability to add new P2P features. It can be easily applied to an on-line environment in our future planed work.

关键词： distributed computer systems

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LoCaF: Detecting Real-World States with Lousy Wireless Cameras

LoCaF: Detecting Real-World States with Lousy Wireless Camer...

引用

international conference on distributed computing in sensor systems (DCOSS)

作者： Benjamin Meyer Richard Mietz Kay Romer Institute of Computer Engineering University of Lübeck Germany

the Internet of things (IoT) integrates wireless sensors to provide online and real-time access to the state of things and places. However, many interesting real-world states are difficult to detect with traditional scalar sensors. Tiny wireless camera sensor nodes are an interesting alternative as a single camera can observe a large area in great detail. However, low image resolution, poor image quality, and low frame rates as well as varying lighting conditions in outdoor scenarios make the detection of real-world states using these lousy cameras a challenging problem. In this paper we introduce a framework that addresses this problem by providing an end-to-end solution that includes energy-efficient image capture, image enhancement to mitigate low picture quality, object detection with low frame rates, inference of high-level states, and publishing of these states on the IoT. the framework can be flexibly configured by end-users without programming skills and supports a variety of different applications.

关键词： Cameras Wireless communication Lighting Object detection Wireless sensor networks Image resolution

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A Spatiotemporal Query Service for Mobile Users in sensor Networks

A Spatiotemporal Query Service for Mobile Users in Sensor Ne...

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international conference on distributed computing systems

作者： Chenyang Lu Guoliang Xing O. Chipara Chien-Liang Fok S. Bhattacharya Department of Computer Science and Engineering Washington University Saint Louis USA

this paper presents MobiQuery, a spatiotemporal query service that allows mobile users to periodically gather information from their surrounding areas through a wireless sensor network. A key advantage of MobiQuery lies in its capability to meet stringent spatiotemporal performance constraints crucial to many applications. these constraints include query latency, data freshness and fidelity, and changing query areas due to user mobility. A novel just-in-time prefetching algorithm enables MobiQuery to maintain robust spatiotemporal guarantees even when nodes operate under extremely low duty cycles. Furthermore, it significantly reduces the storage cost and network contention caused by continuous queries from mobile users. We validate our approach through both theoretical analysis and simulation results under a range of realistic settings

关键词： Spatiotemporal phenomena Intelligent networks Wireless sensor networks Fires Robot sensing systems Delay Computer science Mobile computing Prefetching Robustness

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