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检索条件"任意字段=3rd IEEE International Conference on Distributed Computing in Sensor Systems"

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A Mobile Beacon Based Approach for sensor Network Localization

A Mobile Beacon Based Approach for Sensor Network Localizati...

引用

3rd ieee international conference on Wireless and Mobile computing, Networking and Communications (WiMob)

作者： Bahi, Jacques M. Makhoul, Abdallah Mostefaoui, Ahmed Univ Franche Comte LIFC Comp Sci Lab F-90016 Belfort France

ISBN: (纸本)9780769528892

Mobile beacon localization approaches have been proposed in the literature as an interesting alternative for centralized/decentralized approaches because of their low cost, their accuracy and their low energy consumption. However, their main drawback in a random deployment remains the lack of a well defined mobile beacon trajectory that ensures localization for all the nodes with acceptable error estimations. In this paper we give a solution to the question "What is the optimum mobile beacon trajectory and when should the beacon packets be sent?", and then we propose a simple localization algorithm. This algorithm is based on one mobile beacon. We study three different known curves and we justify the use of the Hilbert space filling curve to be the mobile beacon trajectory. We further compare the localization error of our proposed algorithm and other existing mobile beacon based algorithms. Our results are verified by simulation on Omnet++.

关键词： Trajectories

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An Efficient Ad-Hoc Routing Using a Hybrid Clustering Method in a Wireless sensor Network

An Efficient Ad-Hoc Routing Using a Hybrid Clustering Method...

引用

3rd ieee international conference on Wireless and Mobile computing, Networking and Communications (WiMob)

作者： Nam, Do-Hyun Min, Hong-Ki Univ Incheon Dept Info & Telecomm Engn Inchon 402749 South Korea

ISBN: (纸本)9780769528892

The routing methods which used in the wireless sensor network deal with the clustering method to diminish the amount of data transmission from the energy efficiency view. However, the clustering methods cause several problems in energy consumption at the cluster head node. Dynamic clustering is a method which used to supplement a high energy consumption problem by distributing energy consumption through the re-selection of the cluster head node. But, this method changes cluster structure every time the cluster head node is re-selected, which causes energy consumption. Namely, the dynamic clustering method approaches examined in previous researches involve the repetitive processes of cluster head node selection. This consumes a high amount of energy during the set-up process of cluster generation. Consequently, this paper proposes the hybrid clustering method that fixes the cluster and selects the head node in a round-robin method. The hybrid clustering approach is an energy-efficient method that realizes consistent and balanced energy consumption in each node of a generated cluster to prevent repetitious set-up processes as in the LEACH method. The propriety of the proposed method is substantiated with a simulation experiment.

关键词： Energy utilization

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Joint Channel Assignment and Transmission Scheduling for Throughput Optimization in Wireless Mesh Networks Further Study on A Partitioning Approach

Joint Channel Assignment and Transmission Scheduling for Thr...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Wang, Cheng Jiang, Changjun Tongji Univ Dept Comp Sci & Technol Lab Embedded Syst & Serv Comp Minist Educ Shanghai 201804 Peoples R China

In this paper, we extend the partitioning approach proposed in [1], which considers jointly channel allocation and transmission scheduling under the Primary Interference Constraint, into the more general model of wire... 详细信息

ISBN: (纸本)9781424413119

关键词： WMN channel assignment distributed scheduling

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An adaptive probability access mechanism for wireless sensor network

An adaptive probability access mechanism for wireless sensor...

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8th ACIS international conference on Software Engineering, Artificial Intelligence, Networking and Parallel/distributed computing/3rd ACIS international Workshop on Self-Assembling Wireless Networks

作者： Liang, Wei Yu, Haibin Che, Chang Chinese Acad Sci Shenyang Inst Automat Shenyang 110016 Peoples R China Shenyang Jianzhu Univ Shenyang 110168 Peoples R China

ISBN: (纸本)0769529097

Aiming at large-scale Wireless sensor Network(WSN) whose main communication mode is broadcast, the main factors restricting access performance of contention-based Media Access Control(MAC) protocols were analyzed in this paper. Accordingly, a kind of adaptive probability Access mechanism was put forward, through which contention-based MAC protocols can transmit acknowledgement packet according to acknowledgement probability in the broadcast communication mode and adaptively adjust the acknowledgement probability on the basis of network status in the transmission window. Plentiful simulation results show that the MAC protocol based on the proposed adaptive probability acknowledgement mechanism has better access control performance and energy consumption performance.

关键词： Wireless sensor networks

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TAMPA: Tabu Search-based Multiple Queries Optimization for Wireless sensor Networks

TAMPA: Tabu Search-based Multiple Queries Optimization for W...

引用

3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Tang, MingJian Cao, Jinli Chilamkurti, Naveen K. La Trobe Univ Dept Comp Sci & Comp Engn Melbourne Vic 3086 Australia

ISBN: (纸本)9781424413119

In this paper, we address one of the wireless sensor network query;processing issues posed due to the lack of support for multiple sensor network queries. The objective of the paper is to provide efficient and effective support to multiple queries so that the set of queries are pre-processed before disseminating them into the sensor network. It is very important that only necessary works will be assigned to the sensor network by virtue of strict energy constraint. The problem is modeled by Minimum Set Cover, which is one of the NP-complete problems. We propose an optimization scheme called TAMPA - a TAbu search-based Multiple queries oPtimizAtion to find an optimal merge order. The final set of queries to be sent into the network then can be derived from that merge order. We evaluate the proposed algorithm by conducting extensive simulation studies. The results show that energy can be significantly saved while the overall workload still satisfies the user requirements.

关键词： Wireless sensor Networks Multi-query Optimization Tabu Search

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A SLA-oriented management of containers for hosting stateful web services

A SLA-oriented management of containers for hosting stateful...

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3rd ieee international conference on e-Science and Grid computing

作者： Reich, Christoph Bubendorfer, Kris Banholzer, Matthias Buyya, Rajkumar Department of Computer Science Hochschule Furtwangen University Germany School of Mathematics Statistics and Computer Science Victoria University of Wellington New Zealand Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

ISBN: (纸本)9780769530642

Service-Oriented Architectures provide integration of interoperability for independent and loosely coupled services. Web services and the associated new standards such as WSRF are frequently used to realise such Service-Oriented Architectures. In such systems, autonomic principles of self-configuration, self-optimisation, self-healing and self-adapting are desirable to ease management and improve robustness. In this paper we focus on the extension of the self management and autonomic behaviour of a WSRF container connected by a structured P2P overlay network to monitor and rectify its QoS to satisfy its SLAs. The SLA plays an important role during two distinct phases in the life-cycle of a WSRF container Firstly during service deployment when services are assigned to containers in such a way as to minimise the threat of SLA violations, and secondly during maintenance when violations are detected and services are migrated to other containers to preserve QoS. In addition, as the architecture has been designed and built using standardised modem technologies and with high levels of transparency, conventional web services can be deployed with the addition of a SLA specification.

关键词： Containers

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Index Structures for efficient querying of distributed Triplestores

Index Structures for efficient querying of Distributed Tripl...

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3rd ieee international conference on e-Science and Grid computing

作者： Devadithya, Tharaka Chiu, Kenneth Indiana Univ Dept Comp Sci Bloomington IN 47405 USA SUNY Binghamton Dept Comp Sci Binghamton NY USA

ISBN: (纸本)9780769530642

Data is dynamically structured by nature and can be highly diverse and multifaceted. Often, such diverse and complex information needs to be linked. Conventional datastores, such as relational databases, do not conveniently accommodate dynamically varying structures, as frequently modifying database schemas is not feasible. rdF triplestores offer a flexible solution for handling such data, where any property about an entity can be described by a triple having a subject, a predicate, and an object. Also, data is inherently distributed due to origination points, ownership and many other reasons. Furthermore, storing data in triplestores gives rise to the need to distribute data due to the large number of triples that would result by migrating existing data from a database, for example. In this paper we present our work on designing index structures in order to facilitate efficient querying of a distributed triplestore (DTS). The distributed querying algorithm in DTS makes use of a sub-graph isomorphism approach to eliminate traversing edges between triplestores that does not have the potential to produce any results. We show that our triplestore has equivalent performance as 3Store when used in a non-distributed mode. Our performance tests in the distributed mode show that the indexes improve efficiency of querying.

关键词： Data handling

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Optimum Transmit Power for Maximal Connectivity and Increased Network Lifetime in WSNs

Optimum Transmit Power for Maximal Connectivity and Increase...

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3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Shakir, Mustafa Ahmed, Irfan Peng, Mugen Wang, Wenbo Beijing Univ Posts & Telecommun Wireless Signal Proc & Network Lab Beijing 100088 Peoples R China

ISBN: (纸本)9781424413119

Power conservation is one of the primary issues to be taken care of in wireless sensor networks. Due to the limited battery life, the need to choose an appropriate transmit power becomes more important also to guarantee a maximal connectivity. Transmitting at the least possible power to prolong the network lifetime as a whole while also guaranteeing the best connectivity would be our main interest. We have worked in this paper to look for the most optimum transmit power while also considering the data rates and bow densely the nodes are deployed. We investigated the effects of the transmit power on the network and nodes lifetime thus aiming to prolong the network life by choosing the correct approach.

关键词： sensor networks transmit power connectivity node density network lifetime

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An Effective organizing method for Wireless sensor Networks based on MIMO

An Effective organizing method for Wireless Sensor Networks ...

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3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Wang, Qinghua Qu, Yugui USTC Dept Elect Engn Hefei Peoples R China

ISBN: (纸本)9781424413119

In wireless sensor network (WSN), one of the most critical issues is to minimize the energy consumption. The use of cooperative multiple-input multiple-output (MIMO) communication can save a lot of transmission energy. However, how to organize the WSN based on MIMO remains a critical challenge. In this paper, a novel clustering-CH-exchange-method (CCEM) is proposed to apply cooperative MIMO in WSN. CCEM firstly selects some cluster heads (CHs) and partitions the network into clusters. Then the CH in each cluster finds cooperative nodes to form MIMO antennas. The CH exchange operation runs if CH can't rind enough cooperative nodes. The energy consumption of the network is developed. Simulation results show that CCEM provides high success probability of forming complete MIMO overlay network and significant energy efficiencies.

关键词： cooperative MIMO CCEM energy efficiency

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Collaborative Detection Probability of Mobile Target for Coverage in Large-scale WSN

Collaborative Detection Probability of Mobile Target for Cov...

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3rd international conference on Wireless Communications, Networking and Mobile computing (WiCOM 2007)

作者： Zou Xue-yu Cao Yang Wuhan Univ Sch Elect Informat Wuhan 430072 Peoples R China

ISBN: (纸本)9781424413119

How to estimate the collaborative detection probability (CDP) for given certain number of sensors, characteristics of sensor and target is an important problem for coverage in large-scale WSN. A triangular analytical model (TAM) is developed to analyze CDP for a randomly deployment sensors in a 2-dimensional region. Making use of binomially stochastic distribution and normalization analysis methods, we theoretically characterize the relationship between the CDP for 3 collaborative sensors with the factors of sensor normalization node density (NND) and normalization specified path length (NSPL) on an assumption of target moving direction in parallel to X-axis, and work out a lower bounds on the CDP for 3 collaborative sensors at worst case on condition of NSPL no more than 1. The simulations of random deployment of sensors and target randomly moving direction show that the mobile target moving direction assumed in theoretical analysis has little influence on the detection performance analysis, and that the CDP for 3 collaborative sensors can be evaluated by the NND and the NSPL.

关键词： wireless sensor networks triangular analytical model collaborative detection collaborative detection probability coverage

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