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ieee Annual international Computer Software and Applications conference (COMPSAC)

作者： Tingting Han Taolue Chen Jian Lu State Key Laboratory of Novel Software Technology Nanjing University Nanjing Jiangsu China

The requirement for modifying system structure during system execution is specified by dynamic software architectures. The system architecture style should remain one style or transform within a scope so that some constraints need to be imposed on during the system execution. Our work expands such an idea along two directions in the setting of formalism. The first direction is to model the system by a graph-based calculus stressing the structure. The other direction lies in that we tailor spatial logic to be a suitable logic as the system specification for structure. The model and specification are basis for the model checking algorithm that is to verify whether the system evolution satisfies some structure constraints. We invite a master-slave architecture style as a running example from the beginning and throughout the paper to demonstrate our approach. Such work can be seen as the basis of the structure analysis for architectures.

关键词： Software architecture Logic Master-slave Computer architecture Calculus Laboratories Software algorithms Internet distributed computing Software systems

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A general architecture for wireless sensor networks: first steps

A general architecture for wireless sensor networks: First s...

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24th ieee international conference on distributed computing systems

作者： Hurler, B Hof, HJ Zitterbart, M Univ Karlsruhe Inst Telemat Karlsruhe Germany

ISBN: (纸本)0769520871

Wireless sensor networks have become a very attractive research topic in recent years. Many academic and professional research groups made efforts to construct operative hardware devices and sophisticated software to meet the special conditions in their projects. But still there has been little done to create a general structure for smart sensors to cooperate and to offer their services to human or software clients. In this paper we present first results of our investigations in this topic. As a test scenario and source of inspiration we set up a sensor network prototype in an office situation, where the physical environment should be measured and adjusted according to specific conditions. In particular the light and humidity state of potted plants within an office should be autonomously adjusted to the plants' special needs as most research associates in our lab forget to care for their plants on a regular basis. On the basis of this prolific scenario we introduce a first stage middleware system architecture providing service distribution and accomplishment within wireless sensor networks. Core components of the architecture have been implemented in hardware and software to show the feasibility and abilities of our approach.

关键词： sensor data fusion

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The 24th ieee international conference on distributed computing systems workshops

The 24th IEEE international conference on distributed comput...

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Proceedings - 24th international conference on distributed computing systems Workshops

The proceedings contains 136 papers from the The 24th ieee international conference on distributed computing systems Workshops. The topics discussed include: automatic group protocol for distributed systems;a new media access control protocol for simple hop WDM networks;distributed index updating method for intranet information retrieval;an agent-based consumer recommendation mechanism;pocket SCORM;a general architecture for wireless sensor networks: first steps;log-structured storage for efficient weakly-connected replication and autonomous and proactive adjustment of update allowance in autonomous decentralized database system.

关键词： distributed computer systems

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Correct execution of continuous monitoring queries in wireless sensor systems

Correct execution of continuous monitoring queries in wirele...

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Proceedings - 24th international conference on distributed computing systems Workshops

作者： Lam, Kam-Yiu Pang, Henry Chi-Wai Department of Computer Science City University of Hong Kong

Two important objectives in processing a continuous monitoring queries (CMQ) are: (1) to minimize the processing overheads, especially in communication and query evaluation;and (2) to provide temporally consistent sensor data for query evaluation. The first one is important to normal operations of sensor devices while the second one is to ensure the correctness of the query results. We propose periodic pushing schemes, called PerPush and ConPush, to aggregate the sub-query results of a CMQ. To further improve the performance, we propose the Sequential Pushing (SeqPush) scheme for aggregating the sensor data values generated by the sensor nodes which are close to each other, The pushing path in SeqPush follows a sequential pattern according to the semantic of the queries and the results of evaluation of the sub-queries at the nodes participating in the CMQ.

关键词： Wireless telecommunication systems

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Mobility in Databases and distributed systems: Summing up achievements of the past decade

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MOBILE NETWORKS & APPLICATIONS 2004年第5期9卷 455-457页

作者： Zaslavsky, A Chrysanthis, PK Kumar, V Monash Univ Sch Comp Sci & Software Engn Melbourne Vic 3004 Australia Univ Pittsburgh Dept Comp Sci Pittsburgh PA 15260 USA Univ Missouri SCE Kansas City MO 64110 USA

No abstract available

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Structures for in-network moving object tracking in wireless sensor networks

Structures for in-network moving object tracking in wireless...

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Proceedings - first international conference on Broadband Networks, BroadNets 2004

作者： Lin, Chih-Yu Tseng, Yu-Chee Department of Computer Science and Information Engineering National Chiao Tung University Hsin-Chu 30050 Taiwan

ISBN: (纸本)0769522211

One important application of wireless sensor networks is tracking moving objects. The recent progress has made it possible for tiny sensors to have more computing power and storage space. Therefore, a sensor network can be considered as a distributed database, on which one can conduct in-network data processing. This paper considers in-network moving object tracking in a sensor network. This typically consists of two operations: location update and query. We propose a message-pruning tree structure that is an extension of the earlier work, which assumes the existence of a logical structure to connect sensors in the network. We formulate this problem as an optimization problem. The formulation allows us to take into account the physical structure of the sensor network, thus leading to more efficient solutions than in terms of communication costs. We evaluate updating and querying costs through simulations. © 2004 ieee.

关键词： Wireless telecommunication systems

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Signal processing of sensor node data for vehicle detection

Signal processing of sensor node data for vehicle detection

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international conference on Intelligent Transportation

作者： J. Ding S.-Y. Cheung C.-W. Tan P. Varaiya Department of Electrical Engineering and Computer Sciences Department of Mechanical Engineering University of California Berkeley CA USA General Electric Research Center Niskayuna NY USA Department of Mechanical Engineering University of California Berkeley CA USA UC-Berkeley Richmond Field Station Richmond CA USA Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA

We describe an algorithm and experimental work for vehicle detection using sensor node data. Both acoustic and magnetic signals are processed for vehicle detection. We propose a real-time vehicle detection algorithm called the adaptive threshold algorithm (ATA). The algorithm first computes the time-domain energy distribution curve and then slices the energy curve using a threshold updated adaptively by some decision states. Finally, the hard decision results from threshold slicing are passed to a finite-state machine, which makes the final vehicle detection decision. Real-time tests and offline simulations both demonstrate that the proposed algorithm is effective.

关键词： Signal processing Vehicle detection Signal processing algorithms Magnetic sensors Acoustic sensors Acoustic signal processing Adaptive signal processing sensor phenomena and characterization distributed computing Time domain analysis

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A communication architecture and programming abstractions for real-time embedded sensor networks 23

A communication architecture and programming abstractions fo...

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23rd international conference on distributed computing systems Workshops

作者： Abdelzaher, T Stankovic, J Son, S Blum, B He, T Wood, A Lu, CY Univ Virginia Dept Comp Sci Charlottesville VA 22904 USA

ISBN: (纸本)0769519210

Data distribution in embedded real-time sensor networks requires new protocols and programming environments that achieve time-sensitive message delivery and provide useful abstractions to the application programmer Attainment of these goals requires changes to multiple layers of the communication protocol stack. In this paper we review a protocol suite developed by the authors for data communication in embedded sensor networks. It takes into account time constraints and exports attribute-based connections that are tightly integrated with properties of the monitored environment. A programming language is described that allows external physical objects to be represented as first class abstractions in the computing system. The language facilitates writing monitoring applications. The system was implemented on a prototypical sensor network based on MICA motes.

关键词： sensor networks programming paradigms tracking QoS distributed systems

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Application-driven flow control in distributed monitoring and control systems

Application-driven flow control in distributed monitoring an...

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ieee international conference on Industrial Technology (ICIT)

作者： M. Miskowicz S. Kuta Department of Electronics AGH University of Science and Technology Krakow Poland

The architecture of the acquisition image supporting flow control of the projector is presented. It is achieved by a simple filtering of a periodic sample string, which results in a reduction of updates of high-level concrete images. It is shown that the reduction of the observation flow performed by the filtering action equals to the ratio of the maximum and the average of the absolute value of the first signal derivative in relation to time. An example of the event-triggered signal monitoring in LonWork/EIA-709 technology as a built-in feature of an intelligent sensor device is also presented. The Neuron C code, that exemplifies the "send on delta" technique implementation in a sensor node's application program, is shown.

关键词： distributed control Control systems Monitoring Open loop systems Sampling methods Real time systems Electric variables control distributed computing Filtering Concrete

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Energy-optimal and energy-balanced sorting in a single-hop wireless sensor network

Energy-optimal and energy-balanced sorting in a single-hop w...

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ieee international conference on Pervasive computing and Communications (PerCom)

作者： Mitali Singh Viktor K. Prasanna Department of Computer Science University of Southern California Los Angeles CA USA

A large number of sensors networked together form selforganizing pervasive systems that provide the basis for implementation of several applications involving distributed, collaborative computations. Energy dissipation is a critical issue for these networks, as their life-time is limited by the battery power of the sensors. In this paper, we focus on design of an energy-balanced, energy-optimal algorithm for sorting in a single-hop sensor network. Energy optimality implies that the overall energy dissipation in the system is minimized. Energy-balancedness ensures that all the sensors spend asymptotically equivalent amount of energy in the system. Uniform energy dissipation is desirable as it enables the network to remain fully functional for the maximum time. We demonstrate that given a single-hop, singlechannel network of n randomly distributed sensors, sorting can be performed in O(n log n) time and energy, with no sensor being awake for more than O(log n) time steps. In a p-channel network, where p ∓ n 1-ϵ for 0 < ϵ ∓ 1, sorting can be performed in O(n = p log n) time and O(n log n) energy with no node being awake for more than O(log n) time steps.

关键词： Sorting Intelligent networks Wireless sensor networks Computer networks Energy dissipation sensor systems Military computing Communication switching Collaboration Pervasive computing

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