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检索条件"任意字段=2010 International Conference on Parallel and Distributed Computing and Networks, PDCN 2010"

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RMADV-Hop: An Improved DV-Hop Localization Algorithm

RMADV-Hop: An Improved DV-Hop Localization Algorithm

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international conference on Information Technology: New Generations (ITNG)

作者： Tingting Yi Zhiyi Fang Ruixue Li Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education College of Computer Science and Technology Jilin University Changchun China

In recent years, with the development of the wireless sensor networks, the localization method receives the attention of many researchers. However, due to the network cost and characteristics of sensor nodes, most of the localization algorithms are not well suitable for the wireless sensor network, positioning error is relatively large. Based on the regular moving anchor node and RSSI ranging technique assisting positioning, in this paper, we proposed the RMADV-Hop (Regular Moving Anchor DV-Hop) localization algorithm to improve the DV-Hop algorithm. In the same network condition, we simulated these two localization algorithms using the omnet++ simulation software. Simulation results show that RMADV-Hop algorithm uses less anchor nodes than the DV-Hop algorithm, reduces the cost of network hardware, approximately achieves the evenly distribution of anchor nodes, and can get higher positioning accuracy than the DV-Hop algorithm in the randomly distributed network.

关键词： Wireless sensor networks Costs Algorithm design and analysis Computer networks Hardware Military computing Information technology Educational institutions Computer science Educational technology

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DISTRIBUTER - The distributed system for efficient execution of parallel programs

DISTRIBUTER - The distributed system for efficient execution...

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Proceedings of the international Convention MIPRO

作者： Domagoj Matijević Petar Taler Goran Martinović Department of Mathematics J. J. Strossmayer University of Osijek Osijek Croatia Faculty of Electrical Engineering J. J. Strossmayer University of Osijek Osijek Croatia

We developed the distributed system called “Distributer” in order to make use of millions of unused CPU cycles inside the LAN. The system is based on server-client architecture and the interaction with the system is implemented via web interface on the server side. Clients connect to server and periodically update their status based on which server distributes and sends jobs and at the end collects results. Our system is easy-to-use and easy-to-install and has the simple centralized management of applications needed on client side for jobs execution. We keep all applications on one central repository that is shared to all clients inside LAN with the help of network file system protocol (NFS).

关键词： distributed computing Application software Local area networks Electronic mail Computer networks Large-scale systems Viscosity Mathematics Central Processing Unit Service oriented architecture

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FEED: Fault tolerant, energy efficient, distributed Clustering for WSN

FEED: Fault tolerant, energy efficient, distributed Clusteri...

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international conference on Advanced Communication Technology (ICACT)

作者： Mohammad Mehrani Jamshid Shanbehzadeh Abdolhossein Sarrafzadeh Seyed Javad Mirabedini Chris Manford Islamic Azad University Dezful Iran Department of computer Tarbiat Moalem University Tehran Iran Department of Computing UNITEC Auckland New Zealand Islamic Azad University Tehran Iran

ISBN: (纸本)9781424454273;9788955191455

Increasing network lifetime, scalability and load balancing are important factors for wireless sensor networks. Clustering is a useful technique through which we can effect these factors. In this paper, we propose a new method of clustering which prolongs network lifetime by using energy, density and centrality factors and also the distances between nodes for making clusters. We assume a supervisor node for every cluster head which is to be its replacement when the cluster head fails. This property causes an increase in network lifetime and also helps the network to be fault tolerant. Simulation results demonstrate that using the proposed method offers significant improvement in clustering especially in network lifetime in comparison with the LEACH and HEED methods.

关键词： Feeds Fault tolerance Energy efficiency Wireless sensor networks Clustering algorithms Lead Base stations Routing protocols Java Scalability

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Fairness-oriented Overlay VPN topology construction

Fairness-oriented Overlay VPN topology construction

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international conference on Telecommunications (ICT)

作者： A. Detti A. Caricato G. Bianchi Electronic Engineering Department University of Roma Tor Vergata Italy

An important issue in dynamically constructed Virtual Private networks (VPN) is how the overlay topology is created and maintained. Classical VPN topologies, such as hub-and-spoke or full-mesh, fail to remain convenient and viable when the number of nodes grows to as little as a few tens. Convenient topology formation mechanisms should be distributed, should permit incremental and dynamic operations, and should limit the number of nodes a new entry connects with. In this work, we show that approaches devised to create “short” networks, while yielding a significant total network throughput, may be severely affected by unfairness issues, i.e., different pair of nodes may experience a widely different throughput performance. Hence, we introduce a fairness-oriented topology formation algorithm for VPN. The proposed algorithm is incremental, meaning that the addition of a new node to the overlay topology does not imply rewiring of already established overlay links. Simulation results show that our proposed approach achieves high fairness levels, as quantified in terms of well known Jain's fairness index, meanwhile retaining satisfactory throughput performance.

关键词： Virtual private networks Peer to peer computing Telecommunication network topology Throughput Network topology Circuit topology Tunneling Maintenance engineering Signal processing Protection

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A distributed hierarchical key management scheme for mobile Ad hoc networks

A distributed hierarchical key management scheme for mobile ...

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international conference on Information Networking and Automation (ICINA)

作者： Saju P John Philip Samuel Department of Computer Science Thejus Engineering College Thrissur India School of Engineering Cochin University of Science and Technology India

In MANET, when a node is compromised it tends to reveal the other node's key information and corrupts the whole network. The scalable method of cryptographic key management (SMOCK) proposes a method to deal with such node compromise attacks. But it has certain main drawbacks such as over dependent on centralized server and increase in key-pair when node increases. To deal with these drawbacks, we present an enhanced hierarchical key management scheme using a stable and power efficient cluster management technique. Each cluster head retains the public key of its member nodes only and act as a router when dealing with nodes of other cluster members. Using this technique, the overhead on centralized server is reduced. Moreover, the need of each node storing all public keys are diminished thus minimizing the storage overhead on each node. By Simulation results, we show that our proposed scheme achieves better delivery ratio and resilience with reduced delay and overhead.

关键词： Mobile computing Resilience Cryptography Ad hoc networks IEEE 802.11 Standards

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An Architecture for Distributing Scalable Content over Peer-to-Peer networks

An Architecture for Distributing Scalable Content over Peer-...

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international conference on Advances in Multimedia, MMEDIA

作者： Nicola Capovilla Michael Eberhard Silvano Mignanti Riccardo Petrocco Janne Vehkaperä STMicroelectronics Milan Italy Klagenfurt University Klagenfurt Austria University of Rome ‘Sapienza’ Rome Italy Technische Universiteit Delft Delft Netherlands VTT Technical Research Centre Oulu Finland

Peer-to-Peer systems are nowadays a very popular solution for multimedia distribution, as they provide significant cost benefits compared with traditional server-client distribution. Additionally, the distribution of scalable content enables the consumption of the content in a quality suited for the available bandwidth and the capabilities of the end-user devices. Thus, the distribution of scalable content over P2P networks is a very actual research topic. This paper presents an architecture for the distribution of scalable content in a fully distributed Peer-to-Peer network. The architectural description includes how the scalable layers of the content are mapped to the pieces distributed in the Peer-to-Peer system and detailed descriptions of the producer- and consumer-site architecture of the system. The presented system is to our knowledge the first open-source Peer-to-Peer network with full Scalable Video Coding support.

关键词： Peer to peer computing Satellite ground stations Orbits Artificial satellites Space stations Statistics Orbital calculations Satellite constellations Space vehicles Satellite navigation systems

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Crosstalk aware bandwidth modeling for distributed on-chip RLCG interconnects using difference model approach

Crosstalk aware bandwidth modeling for distributed on-chip R...

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international conference on computing and Networking Technology (ICCNT)

作者： Rajib Kar V. Maheshwari Md. Maqbool Sangeeta Mondal A. K. Mal A. K. Bhattacharjee Department of Electronics and Communication Engineering National Institute of Technology Durgapur West Bengal India

In case of very high frequency as in Giga-scale (GHz), no longer can interconnects be treated as mere delays or lumped RC networks. The most common simulation model for interconnects is the distributed RC and RLC model. The impact of interconnects on circuit performance in both the analog and digital domains is ever increasing. Unfortunately, this model has many limitations which can lead to inaccurate simulations if not modeled correctly. Crosstalk, ringing and reflection are just some of the issues that need to be addressed and then circumvented or utilized. The traditional analysis of crosstalk in a transmission line begins with a lossless LC representation, yielding a wave equation governing the system response. With the reduction of distances between wires in deep sub-micron technologies, coupling capacitances are becoming significant. This increase in capacitance gives rise to noise which is capable of propagating a logical fault. A bad evaluation of the crosstalk could be at the origin of a malfunction of the circuit. Cross talk can be analyzed by computing the signal linkage between aggressor or attacker nets and victim nets. The attacker net carries a signal that couples to the victim net through the parasitic capacitance. To determine the effects that this cross talk will have on circuit operation, the resulting delays and logic levels for the victim nets must be computed. This paper proposes a difference model approach to derive a crosstalk aware bandwidth estimation method in the transform domain. A closed form solution for bandwidth is obtained by incorporating initial conditions using difference model approach for distributed RLCG interconnects. The simulation results justify the accuracy of our approach.

关键词： Crosstalk Integrated circuit interconnections Mathematical model Power transmission lines Integrated circuit modeling Capacitance Equations

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AMREF: An Adaptive MapReduce Framework for Real Time Applications

AMREF: An Adaptive MapReduce Framework for Real Time Applica...

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The Ninth international conference on Grid and Cloud computing(第九届网格与云计算国际学术会议 GCC 2010)

作者： Fan Zhang Junwei Cao Xiaolong Song Hong Cai Cheng Wu National CIMS Engineering and Research Center Department of Automation Tsinghua University Beijing Research Institute of Information Technology Tsinghua University Beijing 100084 P. R. China Tsing National CIMS Engineering and Research Center Department of Automation IBM China Development Laboratory National CIMS Engineering and Research Center Department of Automation Tsinghua National Laboratory

This paper presents AMREF, an Adaptive MapREduce Framework designed for an effective use of computational resources in data center networks to deal with real time data intensive applications. AMREF entails its adaptivity from adaptive splitter, adaptive mappers and adaptive reducers in a stochastic control manner. We use three methods, feedback control, stochastic learning with smooth filter and kalman filter to implement the framwork. Comparison among the three methods suggests they can be effectively and efficiently used to reduce the makspan in three different real-world workload scenarios.

关键词： Adaptive mapreduce Feedback control Stochastic learning control parallel Processing

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Service Invocation over Content-Based Communication in Disconnected Mobile Ad Hoc networks

Service Invocation over Content-Based Communication in Disco...

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international conference on Advanced Information Networking and Applications (AINA)

作者： Yves Mahéo Romeo Said Université Européenne de Bretagne France Valoria Université de Bretagne-Sud Université Européenne de Bretagne France

ISBN: (纸本)9781424466955;9780769540184

This paper presents a middleware platform for the provision of services in disconnected MANETs, focusing on service invocation. This middleware exploits content-based communications (through a publish/subscribe paradigm) and employs a store-carry-and-forward approach for the network-wide opportunistic dissemination of messages. Service invocation is implemented on top of these communication features. The paper first describes the main aspects of the middleware and then details the service invocation mechanism. We namely show that the potential multiplicity of service providers can be exploited in order to increase the client satisfaction and that several network healing techniques allow the reduction of the network load. The paper ends by a description of some simulation experiments in a realistic scenario, whose results reflects the performance of the approach in terms of client satisfaction and network load.

关键词： Mobile communication Mobile ad hoc networks Middleware Routing Network topology Buildings Computational modeling distributed computing Information retrieval Degradation

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A parallel island-based hybrid genetic algorithm for precedence-constrained applications to minimize energy consumption and makespan

A parallel island-based hybrid genetic algorithm for precede...

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international Workshop on Grid computing

作者： M. Mezmaz Y. Kessaci Y. C. Lee N. Melab E-G. Talbi A. Y. Zomaya D. Tuyttens Mathematics and Operational Research Department (MathRO) University of Mons Belgium National Institute of Research in Computer Science and Control (INRIA) Université de Lille 1 France Centre of Distributed and High Performance Computing University of Sydney Australia

Task scheduling algorithms are designed mostly with the sole goal of minimizing makespan (completion time). Almost all research works related to this kind of algorithms do not pay much attention to energy consumption. In this paper, we investigate the energy issue in task scheduling particularly on high-performance computing systems (HCSs). We propose a new island-based bi-objective hybrid algorithm that takes into account, not only makespan, but also energy consumption. The proposed approach uses dynamic voltage scaling (DVS) to minimize energy consumption. Our study provides the significance and potential of DVS. The proposed approach is powerful as it profits from the cooperative paradigm of the island model. Indeed, the obtained results show that our approach outperforms previous scheduling methods, in terms of energy consumption, by a noticeable margin. The obtained schedules are also shorter, in terms of completion time, than those of other algorithms.

关键词： Energy consumption Gallium Scheduling algorithm Voltage control Schedules Scheduling

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