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检索条件"任意字段=13th IEEE/ACM International Conference on Information Processing in Sensor Networks, IPSN 2014"

共 45 条记录，以下是11-20 订阅

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Cyclic Network Automata and Cohomological Waves

Cyclic Network Automata and Cohomological Waves

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Cai, Yiqing Ghrist, Robert Inst Math & Its Applicat Minneapolis MN 55455 USA Dept Elect & Syst Engn Dept Math Philadelphia PA USA

ISBN: (纸本)9781479931460

Following Baryshnikov-Coffman-Kwak [2], we use cyclic network automata (CNA) to generate a decentralized protocol for dynamic coverage problems in a sensor network, with only a small fraction of sensors awake at every moment. this paper gives a rigorous analysis of CNA and shows that waves of awake-state nodes automatically solve pusuit/evasiontype problems without centralized coordination. As a corollary of this work, we unearth some interesting topological interpretations of features previously observed in cyclic cellular automata (CCA). By considering CCA over networks and completing to simplicial complexes, we induce dynamics on the higher-dimensional complex. In this setting, waves are seen to be generated by topological defects with a nontrivial degree (or winding number). the simplicial complex has the topological type of the underlying map of the workspace (a subset of the plane), and the resulting waves can be classified cohomologically. this allows one to "program" pulses in the sensor network according to cohomology class. We give a realization theorem for such pulse waves.

关键词： sensor networks Waves waves Automata Pulses Corollary Network

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ipsn 2014 - Proceedings of the 13th international Symposium on information processing in sensor networks (Part of CPS Week)

IPSN 2014 - Proceedings of the 13th International Symposium ...

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13th ieee/acm international conference on information processing in sensor networks, ipsn 2014

ISBN: (纸本)9781479931460

the proceedings contain 63 papers. the topics discussed include: fine-grained remote monitoring, control and pre-paid electrical service in rural microgrids;aquatic debris monitoring using smartphone-based robotic sensors;using humans as sensors: an estimation-theoretic perspective;one meter to find them all - water network leak localization using a single flow meter;identifying drug (cocaine) intake events from acute physiological response in the presence of free-living physical activity;bringing up OpenSky: a large-scale ADS-B sensor network for research;TempLab: a testbed infrastructure to study the impact of temperature on wireless sensor networks;RESONATE: reverberation environment simulation for improved classification of speech models;optimal sensor placement and measurement of wind for water quality studies in urban reservoirs;and face recognition on smartphones via optimised sparse representation classification.

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Demonstration Abstract: Enabling WSN Nodes to Send Data to Smartmobiles by Blinking LEDs

Demonstration Abstract: Enabling WSN Nodes to Send Data to S...

引用

13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Li, Jo-Ping Chang, Shin-Yi Chou, Pai H. Natl Tsing Hua Univ Dept Comp Sci Hsinchu Taiwan Univ Calif Irvine Irvine CA 92717 USA Natl Tsing Hua Univ Taipei Taiwan

ISBN: (纸本)9781479931460

Greendicator is an indicator system that enables embedded systems to output text to camera-equipped smartphones by blinking an LED. the transmitter emits modulated light pulses using an existing visible-light LED or an IR diode, laser, or light reflector. the receiver uses a camera-equipped smartphone to sense the light pulses and GPU to decode the original message. We demonstrate its use in supporting existing RF-based networks and an aid for pairing and configuration of wireless systems while occupying only a small memory footprint.

关键词： Optical pulses Light emitting diodes Blinking CARRIER SYSTEM Embedded systems Wireless sensor networks WSN gene send Pairing SMIM10L2A gene infrared diode

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Demonstration Abstract: sensor Mockup Experiments with SmartLab

Demonstration Abstract: Sensor Mockup Experiments with Smart...

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Larkou, G. Mintzis, M. Taranto, S. Konstantinidis, A. Andreou, P. G. Zeinalipour-Yazti, D. Univ Cyprus Dept Comp Sci CY-1678 Nicosia Cyprus

ISBN: (纸本)9781479931460

In this demonstration paper we present SmartLab(1), an architecture for managing a cluster of both Android Real Devices (ARDs) and Android Virtual Devices (AVDs) via an intuitive web-based interface. Our architecture consists of several exciting components for re-programming and instrumenting smartphones to perform application testing and data gathering in a facile manner, as well as executing mockup experiments by "feeding" the devices with GPS/sensor readings. We will particularly demonstrate the various components of our architecture that encompasses smartphone sensor data collected by mobile users and organized in our distributed NoSQL document store. the given datasets can then be replayed on our testbed comprising of real and virtual smartphones accessible to developers through our Web 2.0 user interface. We present the applicability of our architecture through various mockup experiments over different application scenarios.

关键词： mockups testbeds mobiles big-data

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P³: A Practical Packet Pipeline Using Synchronous Transmissions for Wireless sensor networks

P<SUP>3</SUP>: A Practical Packet Pipeline Using Synchronous...

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Doddavenkatappa, Manjunath Chan, Mun Choon Natl Univ Singapore Sch Comp Singapore 117548 Singapore

ISBN: (纸本)9781479931460

While high throughput is the key for a number of important applications of sensor networks, performance of the state-of-the-art approach is often poor in practice. this is because if even one of the channels used in its pipeline is bad, the pipeline stalls and throughput degrades significantly. In this paper, we propose a new protocol called P-3 (Practical Packet Pipeline) that keeps its packet pipeline flowing despite the quality differences among channels. P-3 exploits sender and receiver diversities through synchronous transmissions (constructive interference), involving concurrent transmissions from multiple senders to multiple receivers at every stage of its packet pipeline. To optimize throughput further, P-3 uses node grouping to enable the source to transmit in every pipeline cycle, thus fully utilizing the transmission capacity of an underlying radio. Our evaluation results on a 139-node testbed show that P-3 achieves an average goodput of 178.5 Kbps while goodput of the state-of-the-art high throughput protocol PIP (Packets In Pipeline) is only 31 Kbps. More interestingly, P-3 achieves a minimum goodput of about 149 Kbps, while PIP's goodput reduces to zero in 65% of the cases.

关键词： Pipelines

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TempLab: A Testbed Infrastructure to Study the Impact of Temperature on Wireless sensor networks

TempLab: A Testbed Infrastructure to Study the Impact of Tem...

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Boano, Carlo Alberto Zuniga, Marco Brown, James Roedig, Utz Keppitiyagama, Chamath Roemer, Kay Graz Univ Technol Inst Tech Informat Graz Austria Delft Univ Technol Embedded Software Grp Delft Netherlands Univ Lancaster Sch Comp & Commun Lancaster England SICS Swedish ICT Kista Sweden

ISBN: (纸本)9781479931460

Temperature has a strong impact on the operations of all electrical and electronic components. In wireless sensor nodes, temperature variations can lead to loss of synchronization, degradation of the link quality, or early battery depletion, and can therefore affect key network metrics such as throughput, delay, and lifetime. Considering that most outdoor deployments are exposed to strong temperature variations across time and space, a deep understanding of how temperature affects network protocols is fundamental to comprehend flaws in their design and to improve their performance. Existing testbed infrastructures, however, do not allow to systematically study the impact of temperature on wireless sensor networks. In this paper we present TempLab, an extension for wireless sensor network testbeds that allows to control the on-board temperature of sensor nodes and to study the effects of temperature variations on the network performance in a precise and repeatable fashion. TempLab can accurately reproduce traces recorded in outdoor environments with fine granularity, while minimizing the hardware costs and configuration overhead. We use TempLab to analyse the detrimental effects of temperature variations (i) on processing performance, (ii) on a tree routing protocol, and (iii) on CSMA-based MAC protocols, deriving insights that would have not been revealed using existing testbed installations.

关键词： CSMA Protocol Performance RPL Temperature TempLab Testbed Wireless sensor networks

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Demonstration Abstract: OpenSky - A Large-scale ADS-B sensor Network for Research

Demonstration Abstract: OpenSky - A Large-scale ADS-B Sensor...

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Schaefer, Matthias Strohmeier, Martin Lenders, Vincent Martinovic, Ivan Wilhelm, Matthias TU Kaiserslautern Kaiserslautern Germany Univ Oxford Oxford OX1 2JD England Armasuisse Geneva Switzerland

ISBN: (纸本)9781479931460

the future of air traffic control (ATC) will heavily depend on the Automatic Dependent Surveillance - Broadcast (ADS-B) protocol as a crucial component. ADS-B marks a paradigm change in airspace monitoring as global ATC is switching from an independent, radar-based approach to dependent, satellite-supported surveillance. With ADS-B, aircraft broadcast their own position and other information in short periodic messages to other aircraft and control stations on the ground. As the protocol is becoming mandatory in most airspaces over the next years, it is important that its characteristics and challenges are thoroughly investigated. the large-scale ADS-B data required to do this has not been openly accessible until now, as specialized and expensive infrastructure was needed. We demonstrate OpenSky, a sensor network based on low-cost hardware connected over the Internet, which enables real-world experimental studies. OpenSky works with off-the-shelf sensors run by volunteers distributed over Central Europe. Currently comprising 11 sensors, the sensor network covers an area of 720,000 km(2). We capture more than 30% of Europe's commercial air traffic, offering access to billions of ADS-B messages.

关键词： ADS-B sensor networks OpenSky NextGen Air Traffic Control

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Demonstration Abstract: Submetering by Synthesizing Side-Channel sensor Streams

Demonstration Abstract: Submetering by Synthesizing Side-Cha...

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Clark, Meghan Campbell, Bradford Dutta, Prabal Univ Michigan Comp Sci & Engn Div Ann Arbor MI 48109 USA

ISBN: (纸本)9781479931460

Detailed breakdowns of household energy consumption allow occupants to better understand their energy usage patterns and identify opportunities for energy savings. Current solutions are costly, invasive, and difficult to maintain. Sub-metering approaches rely on-and are hindered by-complex hardware. To address these problems, we demonstrate a sub-metering system that can estimate the power draw of individual loads by augmenting aggregate measurements with very simple sensors. these sensors wake up at a frequency proportional to the power draw of a neighboring load, and report these wakeups to a central server. We model the relationship between each sensor's wakeup frequency and the load's power draw as a monotonically increasing polynomial. We calibrate each sensor's function by constructing a linear least squares problem that allows us to discover the set of polynomial coefficients that minimize the difference between the estimated power draw and the power draw as derived from the aggregate measurements. After calibration, we can convert sensor wakeup frequencies to power draw in real time. this systems approach to sub-metering results in deployments that are easy to install and maintain, allowing users to gain a broad yet detailed view of their energy consumption and costs.

关键词： energy-harvesting power metering data aggregation

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Non-invasive Respiration Rate Monitoring Using a Single COTS TX-RX Pair

Non-invasive Respiration Rate Monitoring Using a Single COTS...

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

作者： Kaltiokallio, Ossi Yigitler, Huseyin Jantti, Riku Patwari, Neal Aalto Univ Dept Commun & Networking Espoo Finland Univ Utah Dept Elect & Comp Engn Salt Lake City UT 84112 USA

ISBN: (纸本)9781479931460

Respiratory rate is an important vital sign that can indicate progression of illness but to also predict rapid decline in health. For the purpose, non-contact monitoring systems are becoming more popular due to the self-evident increase in patient comfort. As a cost effective solution for non-invasive breathing monitoring, utilizing the received signal strength measurements of inexpensive transceivers has been proposed. However, the applicability of the available solutions is limited since they rely on numerous sensors. In this work, considerable improvement is made, and a respiratory rate monitoring system based on a single commercial off-the-shelf transmitter-receiver pair is presented. Methods that enable estimation and enhance the accuracy are presented and their effects are evaluated. Moreover, it is empirically demonstrated that the performance of the system is comparable to the accuracy of a high-end device for 3-4 orders of magnitude less price;achieving mean absolute error of 0.12 breaths per minute in the most realistic scenario of the experiments.

关键词： received signal strength COTS transceivers wireless sensor networks respiratory rate monitoring

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Bringing up OpenSky: A Large-scale ADS-B sensor Network for Research

Bringing up OpenSky: A Large-scale ADS-B Sensor Network for ...

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13th ieee/acm international Symposium on information processing in sensor networks (ipsn)

ISBN: (纸本)9781479931460

Automatic Dependent Surveillance - Broadcast (ADS-B) is one of the key components of the next generation air transportation system. Since ADS-B will become mandatory by 2020 for most airspaces, it is important that aspects such as capacity, applications, and security are investigated by an independent research community. However, large-scale real-world data was previously only accessible to a few closed industrial and governmental groups because it required specialized and expensive equipment. To enable researchers to conduct experimental studies based on real data, we developed OpenSky, a sensor network based on low-cost hardware connected over the Internet. OpenSky is based on off-the-shelf ADS-B sensors distributed to volunteers throughout Central Europe. It covers 720,000 km(2), is able to capture more than 30% of the commercial air traffic in Europe, and enables researchers to analyze billions of ADS-B messages. In this paper, we report on the challenges we faced during the development and deployment of this participatory network and the insights we gained over the last two years of operations as a service to academic research groups. We go on to provide real-world insights about the possibilities and limitations of such low-cost sensor networks concerning air traffic surveillance and further applications such as multilateration.

关键词： ADS-B sensor networks OpenSky NextGen Air Traffic Control

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