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ieee international conference on Parallel and distributed computing, Applications and Technologies (PDCAT)

作者： Hui Tian Hong Shen T. Matsuzawa Japan Advanced Institute of Science and Technology Japan

Topology is important for any type of networks because it has great impact on the performance of the network. For wireless sensor networks (WSN), regular topologies, which can help to efficiently save energy and achieve long networking lifetime, have been well studied in [1, 4, 5, 7, 9]. However, little work is focused on routing in patterned WSNs except the shortest path routing with the knowledge of global location information. In this paper, we propose a routing protocol based on random walk. It doesn’t require global location information. Moreover, the random walk routing achieves load balancing property inherently for WSNs which is difficult to achieve for other routing protocols. We also prove that the random walk routing consumes the same amount of energy as the shortest path routing in the scenarios where the message required to be sent to the base station is in comparatively small size with the inquiry message among neighboring nodes. Since in many applications of WSNs, sensor nodes often send only beeplike small messages to the base station to report their status, our proposed random walk routing is a viable scheme. Though the random walk routing provides load balancing in the WSN, the nodes near to the base station (BS) are inevitably under heavier burden than the nodes far from the base station. Therefore we further propose a density-aware deployment scheme to guarantee that the heavy-load nodes do not affect the network lifetime even if they are exhausted.

关键词： Wireless sensor networks Routing protocols Network topology Base stations Data communication Load management Biomedical imaging sensor systems Chemical technology Embedded system

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Synergy between SSM and SAFE in sensor network information processing

Synergy between SSM and SAFE in sensor network information p...

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ieee international conference on Industrial Informatics (INDIN)

作者： S. Sinha Z. Chaczko Engineering Faculty University of Technology Sydney Australia

With the onset of the Internet the perception of computing systems in general has revolutionised. Areas of research have migrated from developing nodes to building networks - thus requiring the need for a variety of information processing techniques, such as clustering, classification, dependency modelling and others. However, the applications of sensor networks are yet to evolve in such proportions. Some of the primary constraints being the resources available in an embedded environment, the need to dynamically configure services to carry out a variety of tasks, communication interfaces and sensing and monitoring techniques. This paper discusses a holonic analysis to aid in mitigating ill-structured and often problematic situations that are often characterized by uncertainty in reasoning and the varying nature of relationships with associated elements. The proposed methodology is a synergy between the classic model derived from soft systems methodology (SSM) and the model of systemic analysis through familiar entities (SAFE). Development of an intelligent security system (ISS) has been considered to be an ideal test-bed for this synergy to go through the phases of problem definition and exploration, development of conceptual models and generation of insight to stimulate acceptable and feasible changes. The technical aspect of this system encompasses the mode of query processing and surveillance through a structured sensor network set up with the aid of distributed services and network protocols.

关键词： Information processing Internet Monitoring Uncertainty Intelligent systems Security System testing Query processing Surveillance sensor systems

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Synchronization effects in mobile ad hoc networks

Synchronization effects in mobile ad hoc networks

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

作者： H. Arora L. Greewald H. Sethu J. Novatnack Department of Computer Science Drexel University Philadelphia PA USA Department of Computer Science Drexel University Philadelphia PA US Dept. of Comput. Sci. Drexel Univ. Philadelphia PA USA Department of Electrical and Computer Engineering Drexel University Philadelphia PA USA

This paper illustrates how networking protocols can inadvertently exacerbate obstacles to providing real-time guarantees for distributed problem solving in wireless mobile and sensor networks. We analyze the effects of control packet timing on providing quality of service guarantees. Inappropriate timing of control packets gives rise to synchronizations that result in sharp increases and decreases in throughput with small changes in node speed. Such synchronizations can seriously jeopardize network performance with direct effect on real-time guarantees. This paper introduces these synchronizations, analyzes them and suggests ways to modify the control packet timing to overcome them. These analyses include investigating the role of buffering at the network layer and its impact on network throughput. We analyze these effects and evaluate our protocol enhancements through simulation studies.

关键词： Intelligent networks Mobile ad hoc networks Throughput Quality of service Timing Routing protocols Wireless sensor networks Wireless communication Large-scale systems Stochastic processes

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Exploiting user behaviour for context-aware power management

Exploiting user behaviour for context-aware power management

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

作者： C. Harris V. Cahill Distributed Systems Group Department of Computer Science Trinity College Dublin Ireland

With more and more computing devices being deployed in buildings there has been a steady rise in buildings' electricity consumption. At the same time there is a pressing need to reduce overall building energy consumption. Pervasive computing could further exacerbate this problem but it could also provide a solution. Context information (e.g., user location) likely to be available in pervasive computing environments could enable highly effective device power management. The objective of such context-aware power management (CAPM) is to minimise the overall electricity consumption of a building while maintaining acceptable user-perceived device performance. To investigate the potential of CAPM we conducted experimental trials for two simple location-aware power management policies. Our results highlight the presence of two distinct user behaviour patterns but also show that location alone is not enough for effective power management. We therefore propose a CAPM framework that employs Bayesian networks to support prediction of user behaviour patterns from multi-modal sensor data for effective power management. We further propose the use of acoustic data as an interesting context for predicting finer-grained user behaviour. The paper presents an initial evaluation of the resulting framework.

关键词： Energy management Energy consumption Pervasive computing Power system management Computer network management Costs Pressing Bayesian methods Hard disks Battery management systems

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High Fidelity Real-Time Simulator With Mixed Real and Virtual sensors

High Fidelity Real-Time Simulator With Mixed Real and Virtua...

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ieee international conference on Robotics and Automation (ICRA)

作者： Z. Papp M. Dorrepaal A.H.C. Thean M.G. van Elk TNO Institute of Applied Physics TNO-TPD Delft Netherlands

The advance in interactive/cooperative robotics and integration of robots into populated environments puts emphasis on robot-robot and robot-environment (incl. human) interactions. Sensing and sensory data interpretation play ever increasing role because sensing becomes the primary way of collecting information about the environment. In this application domain the environment is unstructured, which results in demanding data interpretation and control algorithms. Similarly, the control and decision-making algorithms inevitably become more complex in order to be able to cope with the unstructured and dynamic environment. Consequently a sophisticated evaluation/test environment is required, which provides full control of the circumstances, reproducibility and flexible mix of real and virtual components. The paper presents a multi-agent based distributed HIL simulation environment (MARS), which assures scalable real-time performance and introduces an extension with high fidelity sensor simulation functionality.

关键词： Robot sensing systems Human robot interaction Mars Computational modeling Reproducibility of results Vehicle dynamics System testing Virtual environment distributed computing Decision making

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Integrated sensing and processing for distributed sensor networks

Integrated sensing and processing for distributed sensor net...

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ieee international conference on Networking, Sensing and Control

作者： H.A. Schmitt D.E. Waagen C.O. Savage S. Bellofiore W. Moran Missile Systems Raytheon Company Tucson AZ USA University of Melbourne VIC Australia

Advances in sensor technologies, computation devices, and algorithms have created enormous opportunities for intelligent, automated threat identification, target acquisition, and surveillance. Unfortunately, as information requirements grow, conventional network processing techniques require ever increasing bandwidth between sensors and processors, as well as potentially exponentially complex data reduction methods. Practical approaches requires that the sensing and computation be jointly engineered, to raise the quality of data and classification, and minimize computation, power consumption, and cost.

关键词： Wireless sensor networks Intelligent sensors Missiles Acoustic sensors Monitoring Power engineering computing Processor scheduling Acoustic applications Surveillance Bandwidth

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Intelligent space with time sensitive applications

Intelligent space with time sensitive applications

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ieee/ASME (AIM) international conference on Advanced Intelligent Mechatronics

作者： Wai-Lun Danny Leung R. Vanijjirattikhan Zheng Li Le Xu T. Richards B. Ayhan Mo-Yuen Chow North Carolina State University Raleigh NC US

Intelligent space (iSpace) is a relatively new concept to effectively use distributed sensors, actuators, robots, computing processors and information technology over communication networks. iSpace is a large scale mechatronics system by integrating sensors, actuators, and control algorithms in a communication system using knowledge from various engineering disciplines such as automation and control, hardware and software design, image processing, communication and networking. This paper describes a project "Johnny6 plays fetch in iSpace" to prototype an iSpace at North Carolina State University. The description includes hardware, software and networking algorithms used for this project. Different challenges such as time delay issues in the time sensitive application of iSpace is also discussed

关键词： Intelligent sensors Intelligent actuators Intelligent robots Space technology Image sensors sensor systems Robotics and automation Automatic control Communication system control Control systems

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Comparative study on time-varying target localization methods using multiple unmanned aerial vehicles: Kalman estimation and triangulation techniques

Comparative study on time-varying target localization method...

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ieee international conference on Networking, Sensing and Control

作者： G. York D. Pack Faculty of Electrical Engineering United States Air Force Academy CO USA

In this paper, we evaluate two different methods to search, detect, and locate mobile radio frequency (RF) targets using multiple cooperative unmanned aerial vehicles (VAVs). The primary difference between the two methods is the target localization technique used: the Kalman estimation technique and the triangulation technique. We compare the two methods on the basis of the total task completion time and the total average target location accuracy. The qualitative results generated by a graphical simulator are presented as a part of our comparison study.

关键词： Unmanned aerial vehicles Kalman filters Radio frequency Frequency estimation sensor phenomena and characterization distributed control Control systems Military computing RF signals sensor systems

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Self-stabilizing optimal local routing in ad hoc networks

Self-stabilizing optimal local routing in ad hoc networks

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international conference on distributed computing systems Workshop

作者： D. Bein A.K. Datta V. Villain School of Computer Science University of Nevada Las Vegas NV USA LaRIA Université de Picardie Jules-Verne France

Given a wireless mobile ad hoc network (MANET), we present a self-stabilizing optimal local routing (SOLR) algorithm. Our claim of optimality is based on the minimum distance. The optimal routing is done with respect to the t closest nodes (called t-set). The locality is maintained with respect to the t-set, not with the direct neighbors. The algorithm is transparent to what the distance means: can be either the real distance, or the number of hops. The value of t is application dependent, and is decided in advance. t is n (where n is the upper bound on the maximum number of nodes in the network) when each node needs to know the shortest paths to all other nodes. t is less than n when nodes need to know the network only partially. A self-stabilizing system has the ability to automatically recover to normal behavior in case of transient faults, without a centralized control. Each node can start in some arbitrary state and with no knowledge of the network architecture, but still eventually computes a correct routing table for the t-closest nodes (t-set). The space complexity per node of SOLR, is O((t+/spl delta/)log(n)) bits (where /spl delta/ is the node degree) with a total of O(n(t+/spl Delta/)log(n)) bits (where /spl Delta/ is the maximum node degree) for the whole network. The stabilization time of the SOLR, algorithm is O(d+c) time units (where d is the network diameter and c is a large constant depending on some local computation). SOLR, can easily work for optimal on-demand routing by considering the set of nodes for which the shortest paths are desired instead of the t closest nodes. Also, it can be extended to a global routing protocol by using features specific to other protocols (e.g., hierarchical routing, cluster routing, interval routing, etc.).

关键词： Intelligent networks Ad hoc networks Routing protocols Mobile ad hoc networks Network topology Computer networks Wireless sensor networks Access protocols Computer science Upper bound

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Appointments for 2005-2006 term

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ieee Transactions on Very Large Scale Integration (VLSI) systems 2005年第7期13卷 773-782页

作者： Ranganathan, Nagarajan Agrawal, Vishwani D. Chakradhar, Srimat T. Chakrabarty, Krishnendu Courtois, Bernard DeMara, Ronald Hu, Xiaobo Sharon Ismail, Yehea I. Jha, Niraj K. John, Lizy Kurian Ker, Ming-Dou Koren, Israel Liu, Bin-Da Marculescu, Diana Marculescu, Radu Narayanan, Vijaykrishnan Nassif, Sani R. Nowick, Steven M. Sapatnekar, Sachin S. Sherlekar, Sunil Sylvester, Dennis Vemuri, Ranga Pham, Michael Department of Computer Science and Engineering University of South Florida Tampa FL 33620 United States Department of Computer Science and Engineering Nanomaterials and Nanomanufacturing Research Center University of South Florida Tampa United States IEEE United States Systems United States Department of Electrical and Computer Engineering Rutgers University New Brunswick NJ United States IETE India ACM NEC Laboratories America Inc. Princeton NJ United States Duke University Durham NC United States ACM SIGDA Sigma Xi United States Laboratory of Techniques of Informatics and Microelectronics for Computer Architectecture ASME IMAPS IEEE Computer Society University of Central Florida Orlando United States Computer Engineering Program SEECS Department of Computer Science and Engineering University of Notre Dame Notre Dame IN United States Northwestern University Evanston IL United States Department of Electrical Engineering Princeton University Princeton NJ United States Association for Computing Machinery Austin United States UT Austin Engineering Foundation United States Department of Electronics Engineering National Chiao-Tung University Taiwan Department of Electrical and Computer Engineering University of Massachusetts Amherst United States Department of Electrical Engineering Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA United States Electrical and Computer Engineering Faculty Carnegie Mellon University Pittsburgh PA United States Computer Science and Engineering Department Pennsylvania State University University Park United States IBM Austin Research Laboratory Austin TX United States Columbia University New York NY United States Department of Electrical and Computer Engineering University of Minnesota Minneapolis United States Tata Consultancy Services Centre of Excellence for Embedded Systems India Department of Electrical Engineering IIT Bombay India Department of Electrical Engineering Uni

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