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4-MASCLE - Improved coverage aware clustering with self healing abilities

4-MASCLE - Improved coverage aware clustering with self heal...

引用

Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing in Conjunction with the UIC'09 and ATC'09 Conferences, UIC-ATC 2009

作者： Salzmann, Jakob Behnke, Ralf Gag, Martin Timmermann, Dirk University of Rostock Institute of Applied Microelectronics and Computer Engineering 18051 Rostock Germany

ISBN: (纸本)9780769537375

In large wireless sensor networks, randomly deployed nodes have to organize themselves as energy efficient as possible to avoid redundant sensor and transceiver operations. In addition to its energy awareness, the network has to guarantee complete functionality as long as possible. This paper presents an enhanced version of the clustering algorithm 2-MASCLE. The proposed 4-MASCLE algorithm combines advantages of temporal and spatial network fragmentation by introducing a network division in a four phase based cell system. The assisting ability of adjacent cells is exploited to apply self healing features to the network. We compare our developed algorithm to the basic algorithms and achieve a significant improve of network lifetime. © 2009 IEEE.

关键词： Clustering algorithms

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Assessing the energy efficiency of localization in wireless sensor networks

Assessing the energy efficiency of localization in wireless ...

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2009 6th IEEE Consumer Communications and Networking Conference, CCNC 2009

作者： Lieckfeldt, Dominik You, Jiaxi Behnke, Ralf Salzmann, Jakob Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany 18119 Rostock Germany

ISBN: (纸本)9781424423095

We propose a measure to characterize the energy efficiency of algorithms for localization in wireless networks. The measure presented differs from previous approaches in that it is bounded and supports objective comparison. Furthermore, it corresponds to the general understanding that a high value should indicate high efficiency. Simulation results for localization using Maximum Likelihood Estimation (MLE), for Least Squares Estimation (LS) and for Multidimensional Scaling (MDS) are briefly discussed. ©2009 IEEE.

关键词： Energy efficiency

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Characterizing the energy efficiency of localization algorithms in wireless sensor networks 09

Characterizing the energy efficiency of localization algorit...

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2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009

作者： Lieckfeldt, Dominik You, Jiaxi Salzmann, Jakob Behnke, Ralf Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering Richard-Wagner-Str. 31 18119 Rostock Germany

ISBN: (纸本)9781605585697

We propose a metric to characterize the energy efficiency of range-based localization algorithms in wireless sensor networks. The metric proposed differs from previous approaches in that it is bounded and supports objective comparison of localization algorithms using simulations. The goal of the current work is to show that our metric achieves expected results for well-known localization algorithms and, therefore, can be used to characterize and compare the energy efficiency. Simulation results for energy efficiency show that maximizing the local likelihood yields highest energy efficiency whereas the linear least squares approach and the multidimensional scaling method exhibit a strong susceptibility when ranging errors are large. Copyright © 2009 ACM.

关键词： Energy efficiency

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Exploiting malicious node detection for lifetime extension of sensor networks

Exploiting malicious node detection for lifetime extension o...

引用

2009 6th IEEE Consumer Communications and Networking Conference, CCNC 2009

作者： Behnke, R. Salzmann, J. Lieckfeldt, D. Thurow, K. Golatowski, F. Timmermann, D. University of Rostock Institute of Applied Microelectronics and Computer Engineering Germany Center for Life Science Automation CELISCA Rostock Germany

ISBN: (纸本)9781424423095

Wireless Sensor Networks (WSN) have attracted considerable research effort in the community during the past couple of years. One of the most challenging issues so far is the extension of network lifetime with regards to small battery capacity and self-sustained operation. Endeavors to save energy have been made on various frontiers, ranging from hardware improvements over medium access and routing protocols to network clustering and role changing strategies. In addition some authors studied failures in communication regarded as error detection. Yet, only weak attention has been paid to the detection of malicious nodes and its potential for lifetime extension. In this work, we present a short overview of detection and classification of malicious nodes in WSN and describe its potential in terms of network lifetime and reliability. ©2009 IEEE.

关键词： Sensor nodes

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Trust-by-wire in packet-switched IPv6 networks: Tools and FPGA prototype for the IPclip system

Trust-by-wire in packet-switched IPv6 networks: Tools and FP...

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2009 6th IEEE Consumer Communications and Networking Conference, CCNC 2009

作者： Danielis, Peter Kubisch, Stephan Widiger, Harald Rohrbeck, Jens Altman, Vladyslav Skodzik, Jan Timmermann, Dirk Bahls, Thomas Duchow, Daniel University of Rostock Institute of Applied Microelectronics and Computer Engineering 18051 Rostock Germany Nokia Siemens Networks Broadband Access Division 17489 Greifswald Germany

ISBN: (纸本)9781424423095

This demonstration shows the hardware prototype of the IPclip (IP Calling Line Identification Presentation) mechanism for IPv6 networks. IPclip is a mechanism, which provides Trust-by-Wire in IP-based networks by adding trustworthy location information to IP packets. It is implemented on an FPGA development board and configurable at runtime via a graphical configuration tool. We show IPclip's basic functionality in a localization scenario using an analysis tool and Google Earth and discuss several application scenarios during the demonstration. ©2009 IEEE.

关键词： Field programmable gate arrays (FPGA)

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GAF&Co: Connectivity aware topology management for sensor networks

GAF&Co: Connectivity aware topology management for sensor ne...

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Jiaxi You Dominik Lieckfeldt Jakob Salzmann Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany

In order to achieve energy conservation in WSNs, most topology management protocols use a subset of sensor nodes for global routing. Using fewer nodes results in a reduced connectivity of the network, which eventually increases the number of routing holes. Holes in networks often cause failures in message routing due to the local minimum problem. Therefore, traditional geographic routing protocols cannot be applied with such topology management protocols. In this paper, we propose a novel topology management protocol derived from the Geographical Adaptive Fidelity (GAF) protocol, called GAF with COnnectivity-awareness (GAF&Co). Instead of using virtual grids in GAF, our approach employs hierarchical hexagonal cells to avoid local minimums in WSNs. The purpose is to schedule redundant nodes into energy-saving mode, while maintaining the connectivity of a network for simple geographic routing protocols. Comparing to GAF, the number of cells as well as the overall energy consumption of a WSN also drops dramatically with the proposed protocol.

关键词： Network topology Routing protocols Wireless sensor networks computer network management Energy management engineering management Energy conservation microelectronics computer networks Power engineering and energy

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Exploiting Malicious Node Detection for Lifetime Extension of Sensor Networks

Exploiting Malicious Node Detection for Lifetime Extension o...

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Consumer Communications and Networking Conference, CCNC IEEE

作者： R. Behnke J. Salzmann D. Lieckfeldt K. Thurow F. Golatowski D. Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany

关键词： Wireless sensor networks Routing protocols Chemical sensors Access protocols Fault detection Costs Fault diagnosis Batteries Hardware Knowledge management

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FPGA-based implementation alternatives for keyed-hash message authentication code in networked embedded systems

FPGA-based implementation alternatives for keyed-hash messag...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Enrico Heinrich Marian Lüder Ralf Joost Ralf Salomon Faculty of Computer Science and Electrical Engineering Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany

ISBN: (纸本)9781424427277

Field-programmable gate arrays provide a very flexible implementation platform that supports the development of tamper-proof networked embedded systems. In order to achieve a secure mode of operation, many of these systems employ keyed-hash message authentication code, to provide security against intentional tampering. Since this algorithm is of high computational complexity, this paper utilizes various hardware-software co-design techniques for its implementation, and compares the results to standard software. The considered techniques vary in the degree of required design expertise and of how (software) functionalities are implemented in hardware logic.

关键词： Message authentication Embedded system Hardware Security Field programmable gate arrays Cryptography Logic design Real time systems Protection computer science

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Minimizing Cost of Scalable Distributed Least Squares Localization

Minimizing Cost of Scalable Distributed Least Squares Locali...

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New Technologies, Mobility and Security (NTMS)

作者： Ralf Behnke Jakob Salzmann Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

Wireless Sensor Networks (WSNs) have been of high interest during the past couple of years. One of the most important aspects of WSN research is location estimation. As a good solution of fine grained localization Reichenbach et al. introduced the Distributed Least Squares (DLS) algorithm, which splits the costly localization process in a complex precalculation and a simple postcalculation which is performed on constrained sensor nodes to finalize the localization by adding locale knowledge. This approach lacks for large WSNs, because cost of communication and computation theoretically increases with the network size. In practice the approach is even unusable for large WSNs. An important assumption of DLS is that each blind node is able to communicate with each beacon node to receive the precalculation and to determine distances to beacon nodes. This restriction have been overcome by scalable DLS (sDLS), which enabled to use the idea of DLS in large WSNs for the first time. In this work we present an adaptation of sDLS, that reduces the cost of update operations which are an integral part of sDLS.

关键词： Costs Least squares methods Wireless sensor networks computer networks Computational efficiency microelectronics Distributed computing Scalability LAN interconnection Assembly

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Assessing the Energy Efficiency of Localization in Wireless Sensor Networks

Assessing the Energy Efficiency of Localization in Wireless ...

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Consumer Communications and Networking Conference, CCNC IEEE

作者： Dominik Lieckfeldt Jiaxi You Ralf Behnke Jakob Salzmann Dirk Timmermann Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

We propose a measure to characterize the energy efficiency of algorithms for localization in wireless networks. The measure presented differs from previous approaches in that it is bounded and supports objective comparison. Furthermore, it corresponds to the general understanding that a high value should indicate high efficiency. Simulation results for localization using maximum likelihood estimation (MLE), for least squares estimation (LS) and for multidimensional scaling (MDS) are briefly discussed.

关键词： Energy efficiency Wireless sensor networks Sensor phenomena and characterization Energy measurement Maximum likelihood estimation Wireless communication Energy consumption Signal processing algorithms microelectronics computer networks

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