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检索条件"任意字段=8th IEEE International Conference on Distributed Computing in Sensor Systems, DCOSS 2012"

共 262 条记录，以下是11-20 订阅

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Irida: A real-time Wireless sensor Network visualization feedback protocol

Irida: A real-time Wireless Sensor Network visualization fee...

引用

8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Karagiannis, Marios Dallinge, Laetitia Rolim, Jose Ctr Univ Informat Geneva Switzerland

ISBN: (纸本)9780769547077

In this paper, we describe the implementation of a real time visualization and feedback system for Wireless sensor Network algorithms. the system is based on a fixed hardware testbed, which is deployed on a vertical flat surface and a feedback loop system that takes information about the current state of the network and projects this state, in a visual way, on the surface itself using a video projector. the protocol used is open and simple to use, and can be easily adapted for different hardware configurations. We call our system Irida.

关键词： Wireless sensor Networks Data Visualization Tools Visualization Protocol Visual Feedback

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A novel virtual force approach for node deployment in wireless sensor network

A novel virtual force approach for node deployment in wirele...

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8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Yu, Xiangyu Huang, Weipeng Lan, Junjian Qian, Xin Cisco Syst Inc San Jose CA 95134 USA South China Univ Technol Sch Elect & Informat Engn Guangzhou Guangdong 510640 Peoples R China

ISBN: (纸本)9780769547077

the effectiveness of wireless sensor networks(WSN) depends on the coverage and connectivity provided by node deployment, which is one of the key topics in WSN. In this paper, a modified virtual force-based node self-deployment algorithm for nodes with mobility is proposed. In the virtual force-based approach, all nodes are seen as points subject to repulsive and attractive force exerted among them, nodes can move according to the calculated force. In the proposed approach, Delaunay triangulation is formed with these nodes, adjacent relationship is defined if two nodes are connected in the Delaunay diagram. Force can only be exerted from those adjacent nodes within the communication range. Simulation results showed that the proposed approach has higher coverage rate and faster convergence time than traditional virtual force algorithm.

关键词： Wireless sensor network node deployment virtual force Delaunay triangulation

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MOB-TOSSIM: An Extension Framework For TOSSIM simulator to support Mobility in Wireless sensor and Actuator Networks

MOB-TOSSIM: An Extension Framework For TOSSIM simulator to s...

引用

8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Derhab, Abdelouahid Ounini, Fatma Remli, Badis CERIST Res Ctr Dept Theories & Comp Engn Algiers Algeria USTHB Univ Dept Comp Sci Algiers Algeria

ISBN: (纸本)9780769547077

Recently, there has been considerable research on using mobility in wireless sensor and actor networks (WSANs) to assist in the deployment of nodes and meet the sensing, communication, and actuation coverage requirements. One of the well-know simulators used to evaluate the performance of wireless sensor networks is TOSSIM. It has the advantage that its code can also run in real systems, and hence it allows better comparison between experimental and simulation results. However, it is designed to simulate only static sensor networks. In this paper, we propose a classification scheme that categorizes the mobility models in WSANs. Based on this classification, we design and implement MOB-TOSSIM, the first extension framework to TOSSIM that supports mobility in WSNs and WSANs. MOB-TOSSIM implements three components: (1) a set of probabilistic and controlled mobility models, (2) an extended and modified version of PowerTOSSIM that includes the energy consumption due to mobility and radio transmission, and (3) a radio component based on a realistic propagation model. Experiment results show that MOB-TOSSIM is scalable with respect to network size and node speed, as it incurs an acceptable additional execution time compared to TOSSIM.

关键词： mobility simulator classification scheme radiowave propagation passive wireless sensor wireless energy consumption execution time

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Optimal Relay Placement for Indoor sensor Networks

Optimal Relay Placement for Indoor Sensor Networks

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8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Xue, Cuiyao Zhu, Yanmin Ni, Lei Li, Minglu Li, Bo Shanghai Jiao Tong Univ Dept Comp Sci & Engn Shanghai Peoples R China

ISBN: (纸本)9780769547077

To many sensor networks, the robust operation depends on deploying relays to ensure wireless coverage. this paper considers the crucial problem of optimal relay placement for wireless sensor networks in indoor environments. the placement of relays is essential for ensuring communication quality and data collection. A number of existing algorithms have been proposed for ensuring full sensing coverage and network connectivity. these algorithms can hardly be applied to indoor environments because of the complexity of indoor environments, in which a radio signal can be dramatically degraded by obstacles like walls. We firstly theoretically prove that the indoor relay placement problem is NP-hard. We then predict radio coverage of a given relay deployment in indoor environments, and then propose a efficient greedy algorithm for computing the relay deployment locations for required coverage quality. this algorithm is proved to provide a H-n factor approximation to the theoretical optimum, where H-n = 1 + 1/2 + ... + 1/n = 1 n(n) + 1, and n is the number of all grid points. Experimental results demonstrate the proposed algorithm achieves better performance than two other algorithms. To our knowledge, our work is the very first that study the optimal relay placement problem for sensor networks in complex indoor environments.

关键词： sensor networks relays indoor environment optimal placement approximation algorithms

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Design of Energy Aware Movement-assisted Deployment in Wireless sensor Network

Design of Energy Aware Movement-assisted Deployment in Wirel...

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8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Jia, Jie Liu, Chen Chen, Jian Wu, Xueli Northeastern Univ Sch Informat Sci & Engn Shenyang Peoples R China

ISBN: (纸本)9780769547077

In this paper, we propose an energy aware movement-assisted deployment algorithm to achieve complete coverage and load balance for wireless sensor networks. By dividing the target area into several coronas with the same width of sensor communication radius, the optimal deployment density is computed for each corona. To the whole network, the movement of sensors can be treated as two steps. For the first step, the nodes move straightly between different coronas to regulate the number of nodes in each corona. For the second step, each node moves the adaptive distance inside the corona to achieve uniform distribution by exchanging messages only to its one-hop neighbor. Simulation results are provided to verify our analysis for wireless sensor networks.

关键词： wireless sensor network energy aware movement-assisted deployment network lifetime

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Efficient Mobile Data Collection with Mobile Collect

Efficient Mobile Data Collection with Mobile Collect

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8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Hassanzadeh, Navid Landsiedel, Olaf Hermans, Frederik Rensfelt, Olof Voigt, thiemo Swedish Inst Comp Sci Kista Sweden KTH Stockholm Sweden Uppsala Univ Uppsala Sweden

ISBN: (纸本)9780769547077

the main task of most deployed wireless sensor networks is data collection. While a number of solutions have been designed for static networks, there are currently no widely used data collection algorithms for mobile sensor networks. In this paper, we concentrate on scenarios where many nodes, both data sources and sinks, move along a certain track in one direction, a scenario that is common in sports events. Rather than designing a new protocol from scratch, we extend an existing data collection protocol with lightweight mechanisms to make it efficient for mobility. Our extensive simulations and results in a testbed that includes mobile robots demonstrate that our solution is able to achieve high packet delivery rates at low energy consumption. For our target scenario, our solution more than doubles packet delivery rates when the network is sparse. Our solution also works well in scenarios with a higher degree of mobility where nodes move according to a more demanding random waypoint model.

关键词： converge cast medium access control mobility routing wireless sensor networks

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Source-Based Routing Trees for Efficient Congestion Control in Wireless sensor Networks

Source-Based Routing Trees for Efficient Congestion Control ...

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8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Sergiou, Charalambos Vassiliou, Vasos Univ Cyprus Dept Comp Sci Networks Res Lab Nicosia Cyprus

ISBN: (纸本)9780769547077

Placement of nodes in Wireless sensor Network (WSNs) is often massive and random. Topology control algorithms focus in lowering the initial network topology, by reducing active nodes and links, thus saving resources and increasing network lifetime. Currently, most algorithms and schemes in WSNs, construct shared, core-based trees, with the sink as a root for this purpose. In this paper, we study whether trees that initiate from each source, called source-based trees, can assist in this purpose and provide, under specific circumstances, an efficient topology control solution. Simulation results show that source-based trees can provide proper topology and routing control solution in WSNs, when are employed along with "resource", congestion control algorithms in WSNs.

关键词： Wireless sensor Networks Congestion Control Source Based Trees Sink Based Trees

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An O(log n) distributed Approximation Algorithm for Local Broadcasting in Unstructured Wireless Networks

An <i>O</i>(<i>log n</i>) Distributed Approximation Algorith...

引用

8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Yu, Dongxiao Hua, Qiang-Sheng Wang, Yuexuan Lau, Francis C. M. Univ Hong Kong Dept Comp Sci Pokfulam Rd Hong Kong Hong Kong Peoples R China Tsinghua Univ Inst Interdisciplinary Informat Sci Beijing Peoples R China

ISBN: (纸本)9780769547077

the unstructured multi-hop radio network model, with asynchronous wake-up, no collision detection and little knowledge on the network topology, is proposed for capturing the particularly harsh characteristics of initially deployed wireless ad hoc and sensor networks. In this paper, assuming such a practical model, we study a fundamental problem of both theoretical and practical interests-the local broadcasting problem. Given a set of nodes V where each node wants to broadcast a message to all its neighbors that are within a certain local broadcasting range R, the problem is to schedule all these requests in the fewest timeslots. By adopting the physical interference model and without any knowledge on neighborhood, we give a new randomized distributed approximation algorithm for the local broadcasting problem with approximation ratio O(log n) where n is the number of nodes. this distributed approximation algorithm improves the state-of-the-art result in [22] by a logarithmic factor.

关键词： Approximation algorithms Wireless networks Network topology Distribute

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dcoss 2012 Foreword

DCOSS 2012 Foreword

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8th ieee international conference on distributed computing in sensor systems, dcoss 2012

作者： Lu, Dongming Xu, Wenyuan Wang, Zhi Rabbat, Michael Zhejiang University China University of South Carolina United States McGill University Canada

ISBN: (纸本)9780769547077

the 8th ieee international conference on distributed computing in sensor systems (dcoss 2012) is taking place in Hangzhou, China, from Wednesday, May 16, to Friday, May 18, 2012. Previous editions have taken place in Barcelona, Spain (2011), Santa Barbara, USA (2010), Los Angeles, USA (2009), Santorini Island, Greece (2008), Santa Fe, USA (2007), San Francisco, USA (2006), and Marina del Rey, USA (2005). We are pleased to present the conference program to you. this year, the dcoss program features high-quality research presentations, two keynotes, and a poster and work-inprogress session. the conference program covers several aspects of distributed computing in sensor systems aligned with the three main tracks: algorithms and analysis, signal processing and information theory, and systems and applications. this year we received 100 submissions. Each submitted paper was reviewed by at least three Technical Program Committee experts, and ultimately a total of 34 papers were accepted. We will also feature three interesting workshops and one poster/demonstration/ work-in-progress session. We are proud to feature two excellent keynotes from leading experts on issues currently driving the distributed computing and sensor systems community. We hope that the technical program will provide a stimulating forum for researchers and practitioners throughout all three days. © 2012 ieee.

关键词： distributed computer systems

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Secure Publish-Subscribe-based In-Network Data Storage Service in Wireless sensor Networks

Secure Publish-Subscribe-based In-Network Data Storage Servi...

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8th ieee international conference on distributed computing in sensor systems (dcoss)/IWSN/WiSARN/PWSN

作者： Abdullahi, Muhammad Bashir Wang, Guojun Cent South Univ Sch Informat Sci & Engn Changsha 410083 Hunan Peoples R China

ISBN: (纸本)9780769547077

Recently, it was argued that the true potential of sensor network services can be realized only if they become an integral part of a larger context-aware distributed system. the benefit is that, the intergration allows sensor network services to be seamlessly accessible to remote users through devices that they are already familiar with. this integration can be simplified using a publish-subscribe system. However, the wireless medium facilitates eavesdropping and some data is sensitive. this makes the security extremely important. Furthermore, sensor nodes have limited power and processing resources, so standard security mechanisms, which are heavy in weight and resource consumption, are unsuitable. these challenges increase the need to develop comprehensive and secure solutions that achieve wider protection, while maintaining desirable network performance. In this paper, we propose a secure publish-subscribe-based in-network data storage service in WSNs to provide different security requirements such as confidentiality, authentication, integrity, availability, and authorized access.

关键词： sensor networks safety requirements Data Storage Secure remote user wireless medium Wire tapping Resource utilization Publish-subscribe Heavy

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