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An actor-oriented group mobility model forwireless ad hoc sensor networks

An actor-oriented group mobility model forwireless ad hoc se...

引用

28th international conference on distributed computing systems Workshops, ICDCS Workshops 2008

作者： Ochirsuren, Enkhbold Indrusiak, Leandro Soares Glesner, Manfred Darmstadt University of Technology Institute of Microelectronic Systems Karlstrasse 15 D-64283 Darmstadt Germany

ISBN: (纸本)9780769531731

High level system modeling has significant impact on the early analysis and evaluation of the embedded electronic systems. Being a class of distributed embedded systems, wireless ad hoc sensor networks can benefit from such system-level modeling, but require a suitable mobility model in order to analyze and design reliable and energy-efficient communication protocols. In this paper we propose an actor-oriented group mobility model for wireless ad hoc sensor networks dedicated to wildlife tracking and monitoring. the model can present individual and group motion according to the specified movement patterns, which in turn are characterized by the average moved distance and the average turning angle. © 2008 ieee.

关键词： Wireless sensor networks

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J2EE Architecture for Database Cluster-based High Volume E-Commerce Web Applications

J2EE Architecture for Database Cluster-based High Volume E-C...

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28th international conference on distributed computing systems

作者： Batra, Vishal Li, Wen-Syan Negi, Sumit IBM Ind Res Labs Plot 4 Block C Inst Area New Delhi India IBM Corp Amaden Res Ctr San Jose CA USA

ISBN: (纸本)9781424431748

High volume database-driven e-commerce applications demand a cluster-based infrastructure to offers high availability, scalability and fault tolerance. the current J2EE architecture and containers restrict the transparent deployment of applications over database clusters without engineering data access logic into the applications. Our work extends the J2EE architecture to allow transparent deployment of J2EE applications on a database cluster the key challenge is to load balance read and write queries between the master and replica database instance and yet provide the application with the most recent data in the cluster while enabling service class based query routing. We validate the applicability and effectiveness of the proposed architecture using IBM WebSphere Trade3 stock trading application.

关键词： Fault tolerance

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FIT: A flexible, light-weight, and real-time scheduling system for wireless sensor platforms 1

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4th ieee international conference on distributed computing in sensor systems

作者： Dong, Wei Chen, Chun Liu, Xue Zheng, Kougen Chu, Rui Bu, Jiajun Zhejiang Univ Coll Comp Sci 973 WSN Joint Lab Hangzhou 310027 Zhejiang Peoples R China McGill Univ Sch Comp Sci Montreal PQ H3A 2T5 Canada Natl Univ Def Technol Changsha Hunan Peoples R China

ISBN: (数字)9783540691709

ISBN: (纸本)9783540691693

We propose FIT, a flexible, light-weight and real-time scheduling system for wireless sensor platforms. there are three salient features of FIT. First, its two-tier hierarchical framework supports customizable application-specific scheduling policies, hence FIT is very flexible. Second, FIT is light-weight in terms of minimizing thread number to reduce preemptions and memory consumption while at the same time ensuring system schedulability. We propose a novel Minimum thread Scheduling Policy (MTSP) exploration algorithm within FIT to achieve this goal. Finally, FIT provides a detailed real-time schedulability analysis method to help check if application's temporal requirements can be met. We implemented FIT on MICAz motes, and carried out extensive evaluations. Results demonstrate that FIT is indeed flexible and light-weight for implementing real-time applications, at the same time, the schedulability analysis provided can predict the real-time behavior. FIT is a promising scheduling system for implementing complex real-time applications in sensor networks.

关键词： sensor networks

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the Research on distributed Adaptive Text Classification

The Research on Distributed Adaptive Text Classification

引用

4th international conference on Wireless Communications, Networking and Mobile computing

作者： Yu, Xiao-gao Hubei Univ Econ Dept Informat Management Wuhan Peoples R China

ISBN: (纸本)9781424421077

the automated categorization of documents into predefined labels has received an ever-increased attention for the exponential growth of documents on the Internet and the emergent need to organize them in the recent years. K-Nearest Neighbors is a widely used classifier in text categorization community because of its simplicity and efficiency among all these classifiers. However, K-Nearest Neighbor classification (KNNC) still suffers from inductive biases or model misfits that result from its assumptions, such as the presumption that training data are evenly distributed among all categories. In this paper, a new refinement strategy (DBKNNC) for the KNN Classifier is proposed, which adopts sum-of-squared-error criterion to adaptively select the contributing part from these neighbors and classifies the input document in term of the disturbance degree which it brings to the kernel densities of these selected neighbors. DBKNNC is not sensitive to the parameter k and achieves significant classification performance improvement on imbalanced corpora according to the experimental results.

关键词： kernel density estimation sum-of-squared-error criterion text classification

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WiWi: deterministic and fault tolerant wireless communication over a strip of pervasive devices

WiWi: deterministic and fault tolerant wireless communicatio...

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4th international conference on Wireless Communications, Networking and Mobile computing

作者： De Caneva, Daniele Montessoro, Pier Luca Pierattoni, Davide Univ Udine DIEGM Dep Elect Managerial & Mech Engn I-33100 Udine Italy

ISBN: (纸本)9781424421077

this paper describes the Wireless Wire (WiWi) architecture and the protocol performing efficient wireless communication along a strip of pervasive devices, with short-range transmission capabilities. the system is synchronous and shows deterministic properties in terms of throughput and latency. Fault tolerance is also guaranteed by a simple but robust backup algorithm that organizes pervasive devices In clusters, achieving both reliability and energy saving capabilities. With low cost and extremely simple devices, WiWi builds up a kind of "wire-like" dielectric link that is reliable and suitable for many Interesting applications.

关键词： wireless strip-like topology protocol pervasive devices sensor network

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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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5th international conference on Embedded and Ubiquitous computing

作者： Fan, Sharon Fan, Jeffrey Makki, Kia Pissinou, Nikki Florida Int Univ Dept Elect & Comp Engn Miami FL 33199 USA

ISBN: (纸本)9780769534923

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 file 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 networks systems-on-chips Clustering Maze routing

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A Compact Evidence Model for Knowledge Aggregation of Large-Scale distributed Databases

A Compact Evidence Model for Knowledge Aggregation of Large-...

引用

4th international conference on Wireless Communications, Networking and Mobile computing

作者： Zeng, Cheng Wu, Pinghui Lu, Jianguo Hangshen Holding Grp Ltd Postdoctoral Res Ctr Hangzhou Zhejiang Peoples R China Hebei Univ Technol Tianjin Peoples R China

ISBN: (纸本)9781424421077

When evidence theory is used to aggregate large-scale distributed databases, it is often the case that the evidence model has complicated BPA functions. Such an intractable model severely limits the application prospects of evidence theory in this area. In this paper, a compact evidence model is developed to represent uncertain knowledge discovered from large-scale databases. this model categorizes the uncertainty into two different levels anti model them with a simple evidence and a reliability measure respectively, and then combined these two kinds of uncertainty together by a reliability discounting to obtain a united evidence model. the final united model may be intricate in form but it can be compactly represented by the simple evidence and reliability measure. this compact model is relatively easy to be handled by computer or be conveyed by network since it has only a few model parameters. Sometimes it can also reduce the computation loads needed for evidence combination greatly.

关键词： knowledge aggregation Dempster-Shafer theory evidence model large-scale distributed database reliability uncertainty

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A Pre-selected Clustering Protocol Based on Spatial Correlation

A Pre-selected Clustering Protocol Based on Spatial Correlat...

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4th international conference on Wireless Communications, Networking and Mobile computing

作者： Qian, Jing Yu, Zetai Liu, Shouyin Chong, Jong-Wha Huazhong Normal Univ Elect & Informat Engn Dept Wuhan 430079 Peoples R China Hanyang Univ Coll Informat & Commun Seoul 133791 South Korea

ISBN: (纸本)9781424421077

Wireless sensor networks are mainly characterized by dense deployment of sensor nodes which collectively transmit information about sensed events to the sink. Due to the high density of nodes, spatially redundant data Is generated. In this paper, a pre-selected clustering protocol is proposed to exploit the spatial correlation. In each round, the protocol dynamically divides the entire sensing region into several correlated sub-regions and selects one node as the pre-selected node (representative node) of the sub-region. Only the pre-selected node In each sub-region transfers the sensed data. the pre-selected nodes execute dynamic clustering protocol later in the round. Simulations show that the new protocol can decrease the energy consumption of the nodes and Improve the system lifetime under a given distortion constraint.

关键词： Wireless sensor Networks spatial correlation clustering protocol distortion

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LEAP++: A robust key establishment scheme for wireless sensor networks

LEAP++: A robust key establishment scheme for wireless senso...

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28th international conference on distributed computing systems Workshops, ICDCS Workshops 2008

作者： Chae, Hoon Lim Department of Computer Engineering Sejong University Seoul Korea Republic of

ISBN: (纸本)9780769531731

this paper presents a security-enhanced variant of LEAP+, called LEAP++. the proposed scheme not only improves the security against node capture attacks but also provides additional robustness against denial-of-service and node fabrication attacks. It also provides an easy way to detect in many cases, if not all, node replication and wormhole attacks during key establishment. We also propose a variant of LEAP++ robust even under master key compromise using a small-size ECDH. © 2008 ieee.

关键词： Denial-of-service attack

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On the Broadcast Storm Problems of Routing in Wireless sensor Networks: A Cross-layer Design

On the Broadcast Storm Problems of Routing in Wireless Senso...

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4th international conference on Wireless Communications, Networking and Mobile computing

作者： Zhang, Shuqiang Guo, Wei Wen, Kai Univ Elect Sci & Technol China Natl Key Lab Commun Chengdu 610054 Peoples R China

ISBN: (纸本)9781424421077

Wireless sensor Networks (WSNs) normally consist of large number of sensing nodes that organize themselves into multi-hop wireless networks. It is desirable for communication protocols to minimize the communication overhead and hence the energy consumption while keeping the data delivery relatively reliable. In this paper, we present a new routing protocol, called Cross-layer AODV (CAODV), based on a cross-layer design and Ad hoc On-demand Distance Vector (AODV) routing protocol. the proposed protocol adopts two mechanisms, called Delaying Transmission (DT) and Efficient Broadcasting (EB), to address the broadcast storm problems in WSNs such as high probability of collisions and redundancy of broadcasting. Simulation results show that CAODV can improve the performance of the routing protocol in WSNs by reducing the routing overhead and the latency of route discovery without degrading the packet delivery ratio.

关键词： WSN routing protocol AODV cross-layer design

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