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A novel indirect trust based link state routing scheme using a robust route trust method for wireless sensor networks

A novel indirect trust based link state routing scheme using...

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2012 5th International Conference on New Technologies, Mobility and Security, NTMS 2012

作者： Raha, Arnab Naskar, Mrinal Kanti Chakraborty, Arpita Alfandi, Omar Hogrefe, Dieter Department of Electronics and Telecommunication Engineering Advanced Digital and Embedded Systems Laboratory Jadavpur University Kolkata India Electronics and Communication Engineering Techno India West Bengal University of Technology India Institute of Computer Science Telematics Group Georg-August-Universitaet Goettingen Goettingen Germany

ISBN: (纸本)9781467302296

Integration of trust in routing mechanisms already prevalent in Wireless Sensor Networks (WSN) has become an interesting research area of late. Several methods exist for the assignment of trust to the nodes present in a WSN. However the real challenge lies in proper integration of this trust to an existing routing protocol for the synthesis of a trust-aware routing algorithm. In this paper we try to take the help of Geometrical Mean based indirect trust evaluation mechanism for calculation of trust of individual nodes and thereby use the calculated trusts for determination of the different route trusts (RTs). We present a link state routing protocol based only on these indirect trusts which forms the routes and finds the best trustworthy route among them by comparing the values of all the calculated route trusts as for each route present in the network. We have developed three algorithms related to this and have shown their merits. Finally, we compare our work with similar trust integrated routing protocols and show its advantages over them. © 2012 IEEE.

关键词： Base stations

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Towards real-time media access in vehicular ad-hoc networks

Towards real-time media access in vehicular ad-hoc networks

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IEEE Wireless Communications and Networking Conference Workshops (WCNCW)

作者： Steffen Moser Jochen Weiß Frank Slomka Institute of Embedded Systems/Real-Time Systems Faculty of Engineering and Computer Science Ulm University Ulm Germany

By giving vehicles the ability to propagate warning messages to the other ones, the number and the severity of accidents on our streets could likely be reduced. Safety-related applications based on vehicular ad-hoc neworks (VANET) are usually dependent on transmitting a message from source to sink within a given time limit. IEEE proposes the standard 802.11p which is an adaption of the well-known Wireless LAN 802.11a for inter-vehicle communication. While many properties have been improved, 802.11p still comes with a contention-based medium access control, only. This leads to an indeterminism and data-dependencies. One deterministic and fairer alternative compared to contention based medium access mechanism would be Time-Divison Multiple Access (TDMA). As a VANET is typically fully self-organizing, the time slots must be assigned autonomously by the nodes of the distributed system. This, however, leads to drawbacks in the performance of the protoctol which are analyzed in this paper.

关键词： Vehicles Ad hoc networks Time division multiple access Real time systems Media Access Protocol Communication channels

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Detection and Defense Strategies against Attacks on an Artificial Hormone System Running on a Mixed Signal Chip

Detection and Defense Strategies against Attacks on an Artif...

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International Symposium on Object-Oriented Real-Time distributed Computing

作者： Christoph Leineweber Mathias Pacher Benjamin Betting Julius von Rosen Uwe Brinkschulte Lars Hedrich Embedded Systems Institute for Computer Science J.W. Goe University Frankfurt am Main Germany Embedded Systems Institute for Computer Science Johann Wolfgang Goethe University Frankfurt Frankfurt am Main Germany

The Artificial Hormone System (AHS) is a self organizing system which allocates tasks to processing elements. It works in a distributed way, is able to hold real-time conditions and can run in a mixed-signal chip environment significantly increasing system reliability. Yet the hormone mechanisms offer new ways for malicious attacks which can affect the correct functioning of the AHS. Such attacks may cause severe damage if the AHS is used in an embedded (maybe real-time) environment. Therefore, this paper deals with analyzing malicious attacks on the AHS. We present several ways of attacking the AHS and resulting detection and defense strategies. We also evaluate these strategies in the paper and demonstrate that they can help to protect the AHS from attacks.

关键词： Biochemistry Resource management Silicon Real time systems Upper bound Program processors

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An experimental facility for wireless multi-hop networks in future internet scenarios

An experimental facility for wireless multi-hop networks in ...

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2011 IEEE International Conference on Internet of Things, iThings 2011 and 4th IEEE International Conference on Cyber, Physical and Social Computing, CPSCom 2011

作者： Hahm, Oliver Gunes, Mesut Juraschek, Felix Blywis, Bastian Schmittberger, Nicolai Institute of Computer Science Computer Systems and Telematics Distributed Embedded Systems Freie Universitat Berlin Germany

ISBN: (纸本)9780769545806

Next to traditional communication systems like servers or routers at the backbone and personal computers or laptops acting as clients, the Future Internet will additionally comprise many so-called smart objects. Most of everyday devices like coffee machines, fridges, or light switches will participate in this Internet of Things (IoT). Small-sized computers will connect these devices to the network by establishing low power wireless links. To achieve this vision various kinds of wireless multihop networks (WMHNs) play an important role. During the last years, it has become clear that testbed-based research is mandatory in order to develop suitable protocol implementations and metrics for these networks. In this article, we review network configurations for wireless networks for the IoT. We describe the DESTestbed at the Freie Universität Berlin as an experimental facility to study these network configurations. In addition to the infrastructure and software provided by the testbed, we introduce μkleos as a microkernel based operating system for embedded devices. We designed μkleos with a special focus on Wireless Sensor Networks (WSNs) to complement our approach to study WMHNs. μkleos provides an implementation of 6LoWPAN to interconnect WSNs to IP-based networks. © 2011 IEEE.

关键词： Wireless sensor networks

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Profiling energy consumption of Wireless Sensor Nodes with almost zero effort

Profiling energy consumption of Wireless Sensor Nodes with a...

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IEEE International Conference on Communications

作者： Oliver Hahm Stephan Adler Institute of Computer Science Distributed Embedded Systems Freie Universitat Berlin

ISBN: (纸本)9781457720529

We present a technique to profile the energy consumption of real Wireless Sensor Network (WSN) applications. The introduced method is highly integrated into the system and allows the developer of WSN algorithms to analyze the power consumption almost without any additional effort. It can break the power consumption down to any desired level from function-based or thread-based analysis to the evaluation of functional blocks. The required measuring setup relies on a simple circuit using an instrumentation amplifier and a shunt. Energy profiling uses features of the GNU Compiler Collection and benefits from the multi-threading operating system μkleos written in pure C code. Compared to similar approaches in this field the energy profiler does not require any modifications to device drivers or application code. Due to this easily deployable method it is feasible to examine the demand for energy for every single node in the network.

关键词： Wireless sensor networks Energy consumption Energy measurement Hardware Instruments Operating systems Power demand

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G-Mesh-Lab wireless multi-hop network testbed for the G-Lab

G-Mesh-Lab wireless multi-hop network testbed for the G-Lab

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6th International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TRIDENTCOM 2010

作者： Güneş, Mesut Hahm, Oliver Schleiser, Kaspar Distributed Embedded Systems Computer Systems and Telematics Institute of Computer Science Freie Universität Berlin Germany

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An optimal sensor deployment scheme to ensure multi level coverage and connectivity in wireless sensor networks

An optimal sensor deployment scheme to ensure multi level co...

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International Wireless Communications and Mobile Computing Conference, IWCMC

作者： Arnab Raha Shovan Maity Mrinal Kanti Naskar Omar Alfandi Dieter Hogrefe Department of Electronics and Telecommunication Engineering Advanced Digital and Embedded Systems Laboratory Jadavpur University Kolkata India Institute of Computer Science SensorLab Telematics Group Georg-August-University of Goettingen Gottingen Germany

This paper introduces an optimal deployment algorithm of sensors in a given region to provide desired coverage and connectivity for a wireless sensor network. Our paper utilizes two separate procedures for covering different regions of a symmetrical rectangular area. The proposed method divides the given area of interest into two distinct sub-regions termed as the central and edge regions. In each region, a unique scheme is used to determine the number and location of sensors required to monitor and completely cover the region keeping the connectivity and coverage ranges of the sensors, their hardware specification and the dimensions of the region concerned as the constraints. Our scheme reduces the overhead in determining the position of sensors for deployment by following a coverage and connectivity algorithm of lesser complexity rather than those present in related schemes. Finally, we compare our deployment scheme with the interpolation scheme of [2] in regions of different dimensions and different coverage and connectivity levels with different sensing ranges of the sensors to show our cost efficiency over the latter.

关键词： Wireless sensor networks Sensors Interpolation Reliability Strips Optimization Protocols

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Resource-Aware Configuration in Smart Camera Networks

Resource-Aware Configuration in Smart Camera Networks

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IEEE computer Society Conference on computer Vision and Pattern Recognition Workshops

作者： Bernhard Rinner Bernhard Dieber Lukas Esterle Peter R. Lewis Xin Yao Institute of Networked and Embedded Systems Alpen-Adria Universit?t Klagenfurt 9020 Klagenfurt Austria School of Computer Science University of Birmingham UK

ISBN: (纸本)9781467316118

A recent trend in smart camera networks is that they are able to modify the functionality during runtime to better reflect changes in the observed scenes and in the specified monitoring tasks. In this paper we focus on different configuration methods for such networks. A configuration is given by three components: (i) a description of the camera nodes, (ii) a specification of the area of interest by means of observation points and the associated monitoring activities, and (iii) a description of the analysis tasks. We introduce centralized, distributed and proprioceptive configuration methods and compare their properties and performance.

关键词： Resource-Aware Configuration Smart Camera Networks Smart cameras observation points configurations Network Religious Missions

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distributed service recovery for real-time pub/sub services on disaster management

Distributed service recovery for real-time pub/sub services ...

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International Symposium on Wireless Personal Multimedia Communications (WPMC)

作者： Chi-Sheng Shih Hsin-Yi Chen Embedded Systems and Wireless Networking Laboratory Graduate Institute of Networking and Multimedia Department of Computer Science and Information Engineering National Taiwan University Taiwan

How to exchange information between parties in a mega-scale disaster management system is one of the fundamental challenges to support timely and efficient disaster response and relief. Specifically, the timeliness, scalability, and availability are three desirable features for information exchange. We call the framework to support information exchange with the three features an Open Information Gateway, OIGY in short. In this paper, we present the challenges of information gateway, and the design of the communication protocols and the fundamental components and distributed service recovery algorithms to support the aforementioned features. The algorithm aims at recovering the real-time publish and subscription services without the global information of network topology, available service brokers, and publish/subscription databases. A centralized algorithm is also presented for small scale networks.

关键词： Monitoring Real-time systems Disaster management Subscriptions Logic gates computer architecture

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Improved adaptivity and robustness in decentralised multi-camera networks

Improved adaptivity and robustness in decentralised multi-ca...

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ACM/IEEE International Conference on distributed Smart Cameras, ICDSC

作者： Lukas Esterle Bernhard Rinner Peter R. Lewis Xin Yao Lakeside Laboratories Institute of Networked and Embedded Systems Alpen-Adria Universität Klagenfurt Klagenfurt Austria CERCIA School of Computer Science University of Birmingham Birmingham UK

In this paper we present increased adaptivity and robustness in distributed object tracking by multi-camera networks using a socio-economic mechanism for learning the vision graph. To build-up the vision graph autonomously within a distributed smart-camera network, we use an ant-colony inspired mechanism, which exchanges responsibility for tracking objects using Vickrey auctions. Employing the learnt vision graph allows the system to optimise its communication continuously. Since distributed smart camera networks are prone to uncertainties in individual cameras, such as failures or changes in extrinsic parameters, the vision graph should be sufficiently robust and adaptable during runtime to enable seamless tracking and optimised communication. To better reflect real smart-camera platforms and networks, we consider that communication and handover are not instantaneous, and that cameras may be added, removed or their properties changed during runtime. Using our dynamic socio-economic approach, the network is able to continue tracking objects well, despite all these uncertainties, and in some cases even with improved performance. This demonstrates the adaptivity and robustness of our approach.

关键词： Cameras Robustness Handover Runtime Network topology Topology

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