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Disaster recovery mechanism using widely distributed networking and secure metadata handling technology

Disaster recovery mechanism using widely distributed network...

引用

4th Edition of the UPGRADE-CN Workshop on Use of P2P, GRID and Agents for the Development of Content Networks, UPGRADE-CN'09, Co-located with the 2009 international Symposium on High Performance distributed computing conference, HPDC'09

作者： Ueno, Yoichiro Miyaho, Noriharu Suzuki, Shuichi School of Information Environment Tokyo Denki University 2-1200 Muzai-Gakuendai Inzai Chiba 270-1382 Japan

ISBN: (纸本)9781605585918

An innovative mechanism of a file-backup system concept is discussed. In the proposed file backup mechanism, the combination of the following technologies such as a spatial random scrambling of file data, a subsequent random fragmentation of the file, the corresponding encryption and duplication for each fragmented one by using a stream cipher in each encryption stage, and the corresponding notification of the history data of the used encryption key code sequence which we call metadata in addition can effectively realize the highly secure and prompt file backup system economically only when they are combined at the same time. In case of disaster occurrences in data backup center, the prompt data recovery can be easily and securely achieved by making use of a widely distributed great amount of PCs or cellular phones via several supervisory servers which are secretly diversified and functionally combined mutually. This paper proposes the above mentioned state-of-the art hybrid disaster recovery mechanism and its basic characteristics. Copyright 2009 ACM.

关键词： Metadata

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Active and Programmable Networks- IFIP TC6 7th Intrnational Working conference, IWAN 2005, Revised Papers

Active and Programmable Networks- IFIP TC6 7th Intrnational ...

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7th international Working conference on Active and Programmable Networks, IWAN 2005

ISBN: (纸本)3642009719

The proceedings contain 25 papers. The topics discussed include: validating inter-domain SLAs with a programmable traffic control system;cross-layer peer-to-peer traffic identification and optimization based on active networking;towards effective portability of packet handling applications across heterogeneous hardware platforms;a network-based response framework and implementation;towards the design of an industrial autonomic network node;SAND: a scalable, distributed and dynamic active networks directory service;intelligibility evaluation of a VoIP multi-flow block interleaver;framework of an application-aware adaptation scheme for disconnected operations;the three-level approaches for differentiated service in clustering web server;on the manipulation of JPEG2000, in-flight, using active components on next generation satellites;and a biologically inspired service architecture in ubiquitous computing environments.

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distributed Optimization Based on Utility with Delay Constraints in Wireless Sensor Networks

Distributed Optimization Based on Utility with Delay Constra...

引用

international conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Shengbin Liao Wenqing Cheng Wei Liu Zongkai Yang Department of Electronics and Information Engineering Huazhong University of Science and Technology China Engineering and Research Center of Information and Technology on Education Huazhong Normal University China

Delay requirement becomes a key problem for the time sensitive applications in wireless sensor networks besides the power conservation issue. This paper proposes a novel network utility maximization (NUM) model with constrained delay for real-time applications in wireless sensor networks. By using dual decomposition techniques, we present a distributed iterative price and rate adaption algorithm which converges to the global optimal solution. The presented algorithm can jointly control congestion and contention while meeting the delay requirement of each flow in the network. Numerical results validate our arguments.

关键词： Constraint optimization Wireless sensor networks Costs Utility programs Power engineering and energy Iterative algorithms Delay Educational technology Power engineering education Electronic mail

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Frequency Points Allocation Algorithm in Cluster-Based Sensor Network

Frequency Points Allocation Algorithm in Cluster-Based Senso...

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international conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Jun Yi Weiren Shi Lei Xu Department of Automation Chongqing University Chongqing China

Characteristics of wireless sensor network are mainly featured in three aspects such as numerous nodes and large-scale networks and restricted operation ability. A frequency points allocation algorithm is proposed in order to decrease collision probability with increasing traffic load in this paper. Based on the coloring, nodes with different frequency points in different cluster can communicate with each other to reduce collision probability and avoid disturbance among clusters, especially for hidden-terminal problem by distributed control mode and power control. Test results of frequency points allocation in three power of ZigBee 2.4G show that it can reach the designed goal and costs less.

关键词： Radio spectrum management Clustering algorithms Road accidents Sensor phenomena and characterization Wireless sensor networks Large-scale systems Telecommunication traffic Frequency distributed control Power control

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An Improved Exponential distributed Power Control Algorithm for MIMO Cellular Systems

An Improved Exponential Distributed Power Control Algorithm ...

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international conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Xiaodong Xu Hui Zhang Jingya Li Xiaofeng Tao Ping Zhang

MIMO is a key technology in the fourth generation cellular mobile communication system. Because of channel reuse, it may bring with serious co-channel interference (CCI). In order to reduce such interference, an improved distributed power control algorithm has been proposed. The exponential iteration has been taken in this algorithm, whose convergence speed is much faster than traditional arithmetic iterations. Moreover, in order to improve its robustness, the previous power in iterations has been added in current power iterative equation as a weighted feedback. In addition, this algorithm has been extended into multi-user MIMO cellular communication system. Compared to traditional algorithms, simulation results show that its iterative convergence rate is faster and its efficiency function is more efficient.

关键词： Power control MIMO Iterative algorithms Mobile communication Interchannel interference Radiofrequency interference Arithmetic Robustness Equations Feedback

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Outage Probability Analysis of the Downlink ST-MRC distributed Antenna System over Shadowed Rayleigh Fading Channels

Outage Probability Analysis of the Downlink ST-MRC Distribut...

引用

international conference on Wireless Communications, networking and Mobile computing (WiCom)

作者： Hua-Min Chen Caihua Zhang Ming Chen National Mobile Communications Research Laboratory Southeast University Nanjing Nanjing Jiangsu China

This paper analyzes the outage probability of the downlink distributed antenna system (DAS) with selective transmission (ST) scheme and maximum ratio combining (MRC) over shadowed Rayleigh fading channels. Firstly, the probability density function (PDF) is derived for the output signal to noise ratio (SNR) after MRC at the receiver. Then, under the ST scheme, an approximate analytical expression of outage probability is derived for the downlink ST-MRC DAS over the shadowed Rayleigh fading channels. Simulation results show that the derived analytical expression can evaluate the realistic system performance quite accurately.

关键词： Downlink Fading Signal to noise ratio Mobile antennas Receiving antennas Transmitting antennas System performance Quality of service Content addressable storage Mobile communication

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A Standards-Based Alarms Service for Monitoring Federated Networks

A Standards-Based Alarms Service for Monitoring Federated Ne...

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international conference on networking and Services (ICNS)

作者： Charaka Palansuriya Jeremy Nowell Florian Scharinger Kostas Kavoussanakis Arthur Trew EPCC University of Edinburgh Edinburgh UK

Operators of federated networks require timely detection and diagnosis of networking problems. For detection of such problems, access to monitoring data that exists in multiple organisations is necessary. This paper presents an ongoing work on an Alarms Service which uses a standards-based access mechanism to obtain monitoring data from multiple organisations and then raises alarms based on pre-defined conditions. It discusses typical monitoring requirements from such networks and how these can be addressed with a flexible architecture.

关键词： Condition monitoring Large Hadron Collider Routing distributed computing Grid computing Standards development Optical fiber networks Prototypes

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Brain Image Registration Analysis Workflow for fMRI Studies on Global Grids

Brain Image Registration Analysis Workflow for fMRI Studies ...

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international conference on Advanced Information networking and Applications (AINA)

作者： Suraj Pandey William Voorsluys Musta?zur Rahman Rajkumar Buyya James Dobson Kenneth Chiu Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Department of Psychological & Brain Sciences Dartmouth College USA Grid Computing Research Laboratory Department of Computer Science State University of New York Binghamton NY USA

Scientific applications like neuroscience data analysis are usually compute and data-intensive. With the use of globally distributed resources and suitable middlewares, we can achieve much shorter execution time, distribute compute and storage load, and add greater flexibility to the execution of these scientific applications than we could ever achieve in a single compute *** this paper, we present the processing of image registration (IR) for functional magnetic resonance imaging(fMRI) studies on global grids. We characterize the application, list its requirements and transform it to a workflow. We then execute the application on Gridpsila5000 platform and present extensive performance results. We show that the IR application can have 1) significantly improved makespan, 2) distribution of compute and storage load among resources used, and 3) flexibility when executing multiple times on global Grids.

关键词： Brain Image registration Image analysis distributed computing Grid computing Optical computing Image storage Neuroscience Data analysis Middleware

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DAR: distributed Adaptive Service Replication for MANETs

DAR: Distributed Adaptive Service Replication for MANETs

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IEEE international conference on Wireless and Mobile computing, networking And Communications (WiMob)

作者： Asaad Ahmed Keiichi Yasumoto Naoki Shibata Tomoya Kitani Minoru Ito Graduate School of Information Science Nara Institute of Science and Technology Ikoma Nara Japan Department of Information Processing and Management Shiga University Hikone Shiga Japan Division of Global Research Leaders Shizuoka University Hamamatsu Shizuoka Japan

Mobile ad hoc networks (MANETs) can be used to provide mobile users temporary infrastructure to use services such as database retrieval service when traditional infrastructure-based networks are unavailable in infrastructure-less situations (e.g. after a destructive disaster like an earthquake). The challenging task in such dynamic environments is how we can improve the service availability. An effective strategy is replicating a service at some nodes distributed across the network. However, service replication can considerably impact the system energy consumption. Since mobile devices have a limited amount of battery, a dynamic and efficient service replication is necessary to support such environments. In this paper, we propose a distributed service replication scheme for achieving high service availability with reasonable energy consumption for MANETs. The proposed method called distributed adaptive service replication (DAR) divides the whole network into disjoint zones of at most 2-hops in diameter and builds a dynamic replication mechanism which puts replicas only in zones with high service demand. Through simulations, we have confirmed that our approach can achieve higher service availability and lower energy consumption than an existing method.

关键词： Energy consumption Availability Batteries Information retrieval Service oriented architecture Mobile computing Computer networks Mobile ad hoc networks Multimedia databases distributed computing

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Suitability Analysis of Probabilistic Proactive Routing for Dynamic Multi-hop Ad Hoc Networks

Suitability Analysis of Probabilistic Proactive Routing for ...

引用

IEEE international conference on Wireless and Mobile computing, networking And Communications (WiMob)

作者： Abdelfettah Belghith Adel Ben Mnaouer Mohamed Amine Abid HANA Research Group University of Manouba Tunisia Centre for Information and Communication Technology University of Trinidad and Tobago Trinidad and Tobago Centre for Inf. and Comm. Technology Trinidad and Tobago University

We first propose a new proactive routing framework based on probabilistic decisions and a generic model to compute the existence probabilities of nodes and links. Then, we present a distributed algorithm to collect the cartography of the network. This cartography is used to instantiate the existence probabilities. Conducted simulations show that our proposal yields substantially better routing validity. Nonetheless, it amounts to much longer routes. We proposed then a bounding technique to overcome this side effect and defined two probabilistic proactive routing variants. Conducted simulations show that our proposed bounded probabilistic proactive routing schemes outperform conventional routing protocols and yield up to 66 percent increase in throughput.

关键词： Spread spectrum communication Ad hoc networks Stability Computational modeling Routing protocols Computer networks Throughput Mobile computing Mobile communication distributed algorithms

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