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Balance-Based Energy-Efficient Communication Protocols forWireless sensor Networks

Balance-Based Energy-Efficient Communication Protocols forWi...

引用

international conference on distributed computing systems Workshop

作者： Yu Wang Hongyi Wu R. Nelavelli Nian-Feng Tzeng Center for Advanced Computer Studies University of Louisiana Lafayette Lafayette LA USA

Energy efficiency is a critical design issue in wireless sensor networks, where each sensor node relies on its limited battery power for data acquisition, processing, transmission, and reception. In this paper, we propose several energy-efficient communication schemes based on power control and load balancing, aiming at even distribution of the residual energy of the sensors and thus prolonging the lifetime of overall wireless sensor networks. More specifically, an Integer Linear Programming (ILP) algorithm and a distributed Energy Efficient Routing (DEER) protocol are proposed for time-driven sensor networks. A Residual Energy-based Traffic Splitting (RETS) protocol is introduced for event-driven sensor networks. We have carried out extensive simulations to evaluate the proposed protocols. Our simulation results show that most heuristic approaches yield network lifetimes far smaller than the upper bound obtained from the ILP algorithm. The proposed DEER and RETS approaches can effectively distribute energy consumption evenly among the sensor nodes to prolong the network lifetime by up to 200% or more, when compared with other approaches in the literature.

关键词： Energy efficiency Wireless sensor networks Batteries Data acquisition Power control Load management Integer linear programming Routing protocols Communication system traffic control Traffic control

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Localization Algorithm using Expected Hop Progress in Wireless sensor Networks

Localization Algorithm using Expected Hop Progress in Wirele...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Yun Wang Xiaodong Wang Demin Wang Dharma P. Agrawal OBR Center of Distributed and Mobile Computing Department of ECECS University of Cincinnati USA

In this paper, we propose a novel localization algorithm using expected hop progress (LAEP) to predict the positions of sensor nodes in WSNs. Our algorithm is based on a hop progress analytical model for a given network topology. By deriving relationship between node connectivity and expected-hop progress from the model, the distance between any two nodes can be accurately computed. As the distance estimation is a key issue in positioning system of WSNs, our expected-hop progress based localization algorithm also achieves reasonable performance in anchor-based WSNs with very few anchors. In addition, we considered the impact of deterministic anchor placement on the algorithm performance when the sensors are random deployed. Both grid and triangular placement of anchor nodes have been examined in this paper. Simulation results are seen to be in good agreement with the theoretical analysis and substantiate the validity of our proposed scheme LAEP

关键词： Wireless sensor networks Analytical models Network topology sensor phenomena and characterization Algorithm design and analysis Mobile computing Computer networks distributed computing Monitoring Surveillance

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Optimal distributed Detection in Clustered Wireless sensor Networks: The Weighted Median

Optimal Distributed Detection in Clustered Wireless Sensor N...

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ieee Annual Joint conference: INFOCOM, ieee Computer and Communications Societies

作者： Q. Tian E. J. Coyle Center for Wireless System and Applications School of Electrical and Computer Engineering Purdue University West Lafayette IN USA

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Contory: A Smart Phone Middleware Supporting Multiple Context Provisioning Strategies

Contory: A Smart Phone Middleware Supporting Multiple Contex...

引用

international conference on distributed computing systems Workshop

作者： O. Riva C. di Flora Helsinki Institute of Information Technology HITT Finland Nokia Research Center Tampere Finland

This paper presents Contory, a middleware specifically deployed to support provisioning of context information on mobile devices such as smart phones. Contory integrates multiple strategies for context provisioning, namely internal sensors-based, external infrastructure-based, and distributed provisioning in ad hoc networks. Applications can query Contory about context items of different types, using a declarative query language which features on-demand, periodic, and event-based context queries. Contory allows applications to utilize different provisioning mechanisms depending on resource availability and presence of external infrastructures. This paper illustrates our approach along with its design and implementation on smart phones.

关键词： Smart phones Middleware Context-aware services sensor systems and applications Ad hoc networks Mobile computing Personal digital assistants Magnetohydrodynamic power generation Intelligent sensors Information technology

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Path Planning of Mobile Landmarks for Localization inWireless sensor Networks

Path Planning of Mobile Landmarks for Localization inWireles...

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international conference on distributed computing systems Workshop

作者： D. Koutsonikolas S.M. Das Y.C. Hu School of Electrical and Computer Engineering Center for Wireless Systems and Applications Purdue University West Lafayette IN USA

Many applications of wireless sensor networks require the sensor nodes to obtain their locations. The main idea in most localization methods has been that some nodes with known coordinates (e.g., GPS-equipped nodes) transmit beacons with their coordinates in order to help other nodes to localize themselves. A promising method that significantly reduces the deployment cost is to replace the set of statically deployed GPS-enhanced sensors with one mobile landmark equipped with a GPS unit. In this case, a fundamental research issue is the planning of the path that the mobile landmark should travel along in order to minimize the localization error. In this paper we first study the localization error of three different trajectories for the mobile landmark, namely SCAN, DOUBLE SCAN, and HILBERT. We further study the tradeoffs between the trajectory resolution and the localization accuracy in the presence of 2-hop localization, in which sensors that have already obtained an estimate of their positions help to localize other sensors. Our trajectories are practical and can be easily implemented in mobile robot platforms.

关键词： Path planning Global Positioning System Wireless sensor networks Mobile robots Application software Costs Robot sensing systems Robot kinematics Trajectory Computer networks

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A Mobile-Agent-Based Collaborative Framework for sensor Network Applications

A Mobile-Agent-Based Collaborative Framework for Sensor Netw...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Pratik K. Biswas Hairong Qi Yingyue Xu Avaya Inc.orporate Lincroft NJ USA University of Tennessee Knoxville TN USA Intelligent Automation Inc. Rockville MD USA

In this paper, we present a multi-layered, middleware-driven, multi-agent, interoperable architecture for distributed sensor networks, that bridges the gap between the programmable application layer consisting of software agents and the physical layer consisting of extremely small, low power devices that combine programmable computing with sensing, tracking and wireless communication capabilities. We develop an energy-efficient approach for collaborative processing among multiple sensor nodes using a mobile-agent-based computing model. Unlike the traditional client/server-based model where each sensor node sends data to the sink, in this model the sink/base-station deploys mobile agents that migrate from node to node following a certain itinerary and fuses the information/data locally at each node. This way, the intelligence is distributed throughout the network edge and communication cost is reduced to make the sensor network energy-efficient. Simulation results show that the mobile-agent-based approach is advantageous for large distributed sensor network environment

关键词： Collaboration Intelligent sensors Application software Energy efficiency Computer architecture Wireless sensor networks Bridges Software agents Physical layer Computer networks

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Adaptive to Context in Ubiquitous computing Environments

Adaptive to Context in Ubiquitous Computing Environments

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

作者： Jie Sun Zhaohui Wu College of Computer Science University of Zhejiang China

With the development of mobile devices and wireless communication technologies, users and devices will face an environment full of changes. It is indispensable for a system to adapt to the environment changes, which we call context-awareness. This paper introduces the adaptive mechanisms for embedded systems from the point of view of the data. The data in a context-aware system are in three different forms in different stage: the sensor data, the context, the situation. This paper introduces the context model which consists of three layers and the adaptive mechanisms in different layer to enable the system adaptive to contexts. Besides, we develop an example to show how the clustering and reasoning technology are used to recognize and derive the higher level context

关键词： Ubiquitous computing Logic Embedded system Context modeling Context awareness Embedded computing Atomic layer deposition Wireless communication Communications technology sensor systems

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XtremLab: A System for Characterizing Internet Desktop Grids

XtremLab: A System for Characterizing Internet Desktop Grids

引用

international Symposium on High Performance distributed computing

作者： P. Malecot D. Kondo G. Fedak Laboratoire de Recherche en Informatique/INRIA Futurs Université Paris Sud Orsay France

Desktop grid (DG) systems use the idle computing power of many volunteered desktop PC's on the Internet to support large-scale computation and storage. For over a decade, DG systems have been the largest and the most powerful distributed computing systems, offering a plethora of computing power at a fraction of the cost of supercomputers. The volunteer desktops participating in DG projects are volatile and heterogeneous, but there is little detailed information about their volatility and heterogeneity. Yet this characterization is essential for the simulation and modelling of such systems. We are conducting a project whose goal is to obtain a detailed picture of the DG landscape. To this end, we are deploying resource sensors on the volunteer desktops to measure the availability of CPU, disk space, memory, and network bandwidth. An initial version of the project has been deployed and currently has about 1,800 participating hosts. The resulting resource measurement data and characterization will be useful for a broad range of research areas, including distributed and peer-to-peer computing, and fault tolerance

关键词： Internet Grid computing distributed computing Large-scale systems Costs Supercomputers Computational modeling Power system modeling sensor phenomena and characterization Availability

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Communication-efficient probabilistic quorum systems for sensor networks

Communication-efficient probabilistic quorum systems for sen...

引用

ieee Annual conference on Pervasive computing and Communications Workshops (PerCom)

作者： G. Chockler S. Gilbert B. Patt-Shamir IBM Research USA MIT-CSAIL Tel-Aviv University Israel

Communication-efficiency is of key importance when constructing robust services in limited bandwidth environments, such as sensor networks. We focus on communication-efficiency in the context of quorum systems, which are useful primitives for building reliable distributed systems. To this end, we exhibit a new probabilistic quorum construction in which every node transmits at most O(log 2 n) bits per quorum access, where n is the number of nodes in the system. Our implementation, in addition to being communication efficient, is also robust in the face of communication failures. In particular, it guarantees consistency (with high probability) in the face of network partitions. To the best of our knowledge, no existing probabilistic quorum systems achieve polylogarithmic communication complexity and are resilient to network partitions

关键词： sensor systems Robustness Network servers Complexity theory Wireless sensor networks Probes Bit rate Context Buildings Telecommunication network reliability

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Design and implementation of ubiquitous smart cameras

Design and implementation of ubiquitous smart cameras

引用

ieee international conference on sensor Networks, Ubiquitous, and Trustworthy computing

作者： Chang Hong Lin W. Wolf A. Dixon X. Koutsoukos J. Sztipanovits Princeton University Princeton NJ USA Vanderbilt University Nashville TN USA

ISBN: (纸本)0769525539;97

Design aspects and software modelling for ubiquitous real-time camera system are described in this paper. We propose system architecture using a network of inexpensive cameras and perform video processing in-network. In general, ubiquitous systems have to perform spatial and temporal calibration in advance to determine timing and coordination relationship between sensor nodes, and other application specific design considerations, such as system architecture, distributed software, control authority and communication channel. A methodology for transforming well-designed single-node algorithm to distributed system is also proposed. Applications for ubiquitous cameras can be modelled as the composition of system finite state machine, functional services and middleware. A service oriented software architecture is proposed to dynamically reconfigure services when system state changes. We have developed a distributed gesture recognition system with true in-network processing to analyze video in real time. By exchanging data and control messages between neighboring sensors, each node can maintain broader view of the environment with integrated video processing results. Our prototype system is built on Windows machines, and uses Webcams as sensors and local network as communication channel

关键词： Smart cameras Real time systems Computer architecture Application software Communication system control Communication channels Software design Calibration Timing sensor systems and applications

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