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检索条件"任意字段=5th ACM Conference on Embedded Networked Sensor Systems"

共 1274 条记录，以下是301-310 订阅

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Staffetta: Smart duty-cycling for opportunistic data collection 16

Staffetta: Smart duty-cycling for opportunistic data collect...

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14th acm conference on embedded networked sensor systems, SenSys 2016

作者： Cattani, Marco Loukas, Andreas Zimmerling, Marco Zuniga, Marco Langendoen, Koen Embedded Software Group Delft University of Technology Netherlands Networked Embedded Systems Group TU Dresden Germany

ISBN: (纸本)9781450342636

Opportunistic routing protocols tackle the problem of effcient data collection in dynamic wireless sensor networks, where the radio is duty-cycled to save energy and the topology changes unpredictably due to node mobility and/or link dynamics. Unlike protocols that maintain a routing structure, in opportunistic protocols nodes forward packets to any neighbor that wakes up first, reducing latency and energy costs and increasing the resilience to network dynamics. We claim the performance of existing opportunistic routing protocols can be improved while retaining their resilience by harnessing the synergy between duty cycling and opportunistic forwarding. To prove this claim, we present Staetta, the first practical duty-cycle adaptation scheme for opportunistic low-power wireless protocols. Staetta dynamically adapts each node's wake-up frequency to its current forwarding cost, so nodes closer to the sink become more active than nodes farther away. In this way, Staetta biases the forwarding choices toward the sink as the neighbor waking up first is also likely to offer high routing progress. Experiments on two testbeds with four different opportunistic routing mechanisms demonstrate that Staetta achieves severalfold performance improvements compared with a fixed wake-up frequency. As a case a point, Staetta enables ORW, the state-of-the-Art opportunistic routing protocol, to reduce end-To-end packet latency by 79-452 and energy consumption by 2.75-9 while increasing packet delivery ratio compared with ORW's default link-layer settings. © 2016 Copyright held by the owner/author(s).

关键词： Routing protocols

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Demo Abstract: Rebooting the embedded system 14

Demo Abstract: Rebooting the embedded system

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14th acm conference on embedded networked sensor systems, SenSys 2016

作者： Levy, Amit Campbell, Bradford Ghena, Branden Leonard, Shane Pannuto, Pat Levis, Philip Dutta, Prabal Stanford University United States University of Michigan United States

ISBN: (纸本)9781450342636

For the last fifteen years, research explored the hardware, software, sensing, communication abstractions, languages, and protocols that could make networks of small, embedded devices|motes|sample and report data for long periods of time while unattended. Today, the application and tech-nological landscapes have shifted, introducing new require-ments and new capabilities. Hardware has evolved past 8 and 16 bit microcontrollers: there are now 32 bit processors with lower energy budgets and greater computing capabil-ity. New wireless link layers have emerged, creating proto-cols that support direct interaction with users, but introduce novel limitations that systems must consider. Programming language advances have led to the ability to write system kernels that guarantee safety and reliability while maintain-ing low overhead. the time has come to look beyond opti-mizing networks of motes. We look towards new technologies such as Bluetooth Low Energy, Cortex M processors, and ca-pable multi-process operating systems, with new application spaces such as personal area networks, and new capabilities and requirements in security and privacy to inform contem-porary hardware and software platforms. It is time for a new, open experimental platform in this post-mote era. © 2016 Copyright held by the owner/author(s).

关键词： Personal communication systems

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Poster Abstract: Deploying a 6LoWPAN, CoAP, low power, wireless sensor network 14

Poster Abstract: Deploying a 6LoWPAN, CoAP, low power, wirel...

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14th acm conference on embedded networked sensor systems, SenSys 2016

作者： Fabre, Arthur Martinez, Kirk Bragg, Graeme M. Basford, Philip J. Hart, Jane Bader, Sebastian Bragg, Olivia M. Electronics and Computer Science University of Southampton United Kingdom Geography and Environment University of Southampton United Kingdom Electronics Design Mid Sweden University Sweden Environment University of Dundee United Kingdom

ISBN: (纸本)9781450342636

In order to integrate equipment from different vendors, wire-less sensor networks need to become more standardized. Us-ing IP as the basis of low power radio networks, together with application layer standards designed for this purpose is one way forward. this research focuses on implement-ing and deploying a system using Contiki, 6LoWPAN over an 868 MHz radio network, together with CoAP as a stan-dard application layer protocol. A system was deployed in the Cairngorm mountains in Scotland as an environmental sensor network, measuring streams, temperature profiles in peat and periglacial features. It was found that RPL pro-vided an effective routing algorithm, and that the use of UDP packets with CoAP proved to be an energy efficient application layer. this combination of technologies can be very effective in large area sensor networks. © 2016 Copyright held by the owner/author(s).

关键词： Energy efficiency

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Data prediction + synchronous transmissions =ultra-low power wireless sensor networks 16

Data prediction + synchronous transmissions =ultra-low power...

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14th acm conference on embedded networked sensor systems, SenSys 2016

作者： Istomin, Timofei Murphy, Amy L. Picco, Gian Pietro Raza, Usman University of Trento Italy Bruno Kessler Foundation Italy Toshiba Research Europe Limited United Kingdom

ISBN: (纸本)9781450342636

Data prediction in wireless sensor networks replaces the com-monly used (periodic) data reporting with a model, updated (infrequently) at the sink to accurately reproduce real data trends. this technique abates up to 99% of application mes-sages;yet, recent work has shown it achieves \only" up to a 7x lifetime improvement when executed atop a mainstream network stack (e.g., CTP + BoX-MAC), as the idle listen-ing and topology maintenance in the latter are ill-suited to the sparse trafic induced by data prediction. this paper presents a novel network stack designed for data prediction, Crystal, that exploits synchronous transmissions to quickly and reliably transmit model updates when these occur (in-frequently but often concurrently), and minimizes overhead during the (frequent) periods with no updates. Based on 90-node experiments in the Indriya testbed and with 7 public datasets, we show that Crystal unleashes the full poten-tial of data prediction, achieving per-mille duty cycle with perfect reliability and very small latency. © 2016 Copyright held by the owner/author(s).

关键词： Wireless sensor networks

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TDMA-Based MAC Protocols for Wireless sensor Networks: A Survey and Comparative Analysis 5

TDMA-Based MAC Protocols for Wireless Sensor Networks: A Sur...

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5th International conference on Wireless Networks and embedded systems (WECON)

作者： Kaur, Tarunpreet Kumar, Dilip LONGOWAL SLIET Dept Elect & Commun Engn Sangrur India

ISBN: (纸本)9781509008933

Recent advances in technology proliferate the use of Wireless sensor Network in various fields such as environmental monitoring, intrusion detection, industrial automation, surveillance and so on. WSN has various design constraints such as energy consumption, scalability, delay, traffic adaptability, throughput and overheads which require an efficient MAC protocol to address these issues. Recently, several TDMA-based MAC protocols have been proposed to reduce the energy cost due to idle listening, control overheads and collision. this paperprovides an overview of TDMA-based MAC protocol designed for large-scale cluster-based wireless sensor networks. In addition, aqualitative comparison of these protocols is also presented on basis of analytical expressions for energy consumption and transmission latency.

关键词： Wireless sensor Network (WSN) Medium Access Control (MAC) Time Division Multiple Access (TDMA) Contention Access Period (CAP)

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SNOW: sensor network over white spaces 16

SNOW: Sensor network over white spaces

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14th acm conference on embedded networked sensor systems, SenSys 2016

作者： Saifullah, Abusayeed Rahman, Mahbubur Ismail, Dali Lu, Chenyang Chandra, Ranveer Liu, Jie Department of Computer Science Missouri University of Science and Technology Rolla United States Cyber-Physical Systems Laboratory Washington University in St. Louis St Louis United States Microsoft Research Redmond United States

ISBN: (纸本)9781450342636

Wireless sensor networks (WSNs) face significant scalabil-ity challenges due to the proliferation of wide-Area wireless monitoring and control systems that require thousands of sensors to be connected over long distances. Due to their short communication range, existing WSN technologies such as those based on IEEE 802.15.4 form many-hop mesh net-works complicating the protocol design and network deploy-ment. To address this limitation, we propose a scalable sen-sor network architecture-called sensor Network Over White Spaces (SNOW)-by exploiting the TV white spaces. Many WSN applications need low data rate, low power operation, and scalability in terms of geographic areas and the num-ber of nodes. the long communication range of white space radios significantly increases the chances of packet collision at the base station. We achieve scalability and energy ef-ficiency by splitting channels into narrowband orthogonal subcarriers and enabling packet receptions on the subcar-riers in parallel with a single radio. the physical layer of SNOW is designed through a distributed implementation of OFDM that enables distinct orthogonal signals from dis-tributed nodes. Its MAC protocol handles subcarrier allo-cation among the nodes and transmission scheduling. We implement SNOW in GNU radio using USRP devices. Ex-periments demonstrate that it can correctly decode in less than 0.1ms multiple packets received in parallel at differ-ent subcarriers, thus drastically enhancing the scalability of WSN. © 2016 Copyright held by the owner/author(s).

关键词： Scalability

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A Comparison for Capturing Arm Kinematics using Solutions of Wahba's Problem and Ordinary Data Fusion Mechanisms 5

A Comparison for Capturing Arm Kinematics using Solutions of...

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5th International conference on Wireless Networks and embedded systems (WECON)

作者： Karunarathne, M. Sajeewani Pathirana, Pubudu N. Deakin Univ Sch Engn Geelong Vic Australia

ISBN: (纸本)9781509008933

Rehabilitation is becoming one of critical and essential part in medicine due to fast aging population, the people with various disabilities and increasing health care expenditure. With the advancement of wearable sensor technologies, inertial sensors with magnetometers are well known as a worthy solution for these challenges since it is affordable and precise solution. However, the measurements from IMU devices are engaged with accuracy deficiencies in attitude estimations due to noisiness in measurements. the accuracy improvement of estimation using IMUs has investigated in various studies in literature, though there is a room for further discussions of such improvements with less heavy and complex algorithms. this paper is focused to investigate the applicability of some typical solutions of Wahba's Problem and ordinary filtering mechanism with inertial sensor measurements to accurately capture human arm kinematics. Additionally, these algorithms are compared and validated with real-time sensor measurements.

关键词： Complementary Filter Inertial sensor Upper Body Tracking Solutions for Wahba's problem

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An Outlier Detection Scheme For Wireless sensor Networks 5

An Outlier Detection Scheme For Wireless Sensor Networks

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5th International conference on Wireless Networks and embedded systems (WECON)

作者： Patil, Shantala Devi Vijayakumar, B. P. REVA ITM Comp Sci & Engn Bangalore Karnataka India MS Ramaiah IT ISE Bangalore Karnataka India

ISBN: (纸本)9781509008933

Securing wireless sensor network is drawing a lot of attention of researchers with detecting outliers being a major concern. Outlier is referred to as deviated behavior from normal pattern of the network elements caused by noise, events or attacks. Outlier detection is crucial for normal functioning of the network and forms the first step towards security management. By taking suitable actions or by thwarting the erroneous behavior outliers can be managed. Events occur when there is a change in the state of the networks and is expected behavior in the network, whereas attacks are unexpected behavior in network causing difficult situation in the network. Event detection and attack detection are many a times mistook as same. Event detection is followed by suitable actions to handle the event whereas attack detection should be followed by counter measures to subdue the situation. In this paper, we propose an outlier detection scheme (ODS) for detecting events and attacks in the wireless sensor network. We evaluate the efficiency of scheme through simulations.

关键词： Outliers Wireless sensor Networks Events Node Compromise Malicious Activity

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A Survey on Hardware Design Issues in RF Energy harvesting for Wireless sensor Networks (WSN) 5

A Survey on Hardware Design Issues in RF Energy harvesting f...

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5th International conference on Wireless Networks and embedded systems (WECON)

作者： Verma, Gourav Sharma, Vidushi Gautam Buddha Univ Sch Informat & Commun Technol Greater Noida UP India

ISBN: (纸本)9781509008933

Today, the lifetimeimprovement in the wireless sensor networksis one of the most critical issue for researchers. the efficientRadio Frequency (RF) Energy harvesting technique provides themicro-power needed for sensor node and flexibility of charging the battery. Many researchers are working on the hardware issues like new emerging technologies to optimize the efficiency of the circuit. Some are working on commercially available devices (ICs, Schottky diodes, Antennas etc.), component level (using VLSI design) and mathematical modeling to generate efficient models for RF energy Harvesting. Powercast companies provide circuits which input the RF signal and output it in the form of charging voltage and current. In this paper, a detailed theoretical study and literature has been surveyed to find current and new era of research in this domain. this paper may help the researchers to find new points for the research in the domain of Radio Frequency Energy Harvesting

关键词： WSN Node EHWSN Energy Harvesting RF energy harvesting Survey on RF Energy Harvesting Energy harvesting Protocols

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Smart Water Management Using IOT 5

Smart Water Management Using IOT

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5th International conference on Wireless Networks and embedded systems (WECON)

作者： Wadekar, Sayali Vakare, Vinayak Prajapati, Ramratan Yadav, Shivam Yadav, Vijaypal Terna Engn Coll Dept Elect & Telecommun Engn Navi Mumbai India

ISBN: (纸本)9781509008933

this paper presents an IOT device which help to manage and plan the usage of water. this system can be easily installed in residential societies. sensors placed in the tank which continuously informs the water level at the current time. this information will be updated on the cloud and using an android application, user can visualize the water level on a Smartphone anywhere that is connected to Internet. According to the level of water in the tank the motor functioning will be automatically controlled, at low level of water motor will automatically turn on and when tank is about to fill up it will cut off.

关键词： IOT device Water Level sensor cloud android application

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