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18th Annual international conference on distributed computing in sensor systems (DCOSS)

作者： Guo, Hongzhi Quartey, Irvin Green, Cameron Norfolk State Univ Engn Dept Norfolk VA 23504 USA

ISBN: (纸本)9781665495127

This paper considers the problem of localizing a static transmitter using a robot with a single receiving antenna and a single communication chamiel in unknown complex environments. Existing solutions using Time -of-Arrival (TOA) and Angle -of-Arrival (AOA) rely on complex wireless communication systems with multiple receive antennas or multiple communication channels, which are not available for robots with off-the -shelf low-cost radios. This paper develops a localization framework using Received Signal Strength (RSS) to estimate unknown channel model parameters considering mullipath fading and spatial -correlated shadowing effects. The robot moves along a predefined trajectory to collect RSS data. AOA information is also estimated and integrated with the robot SLAM (Simultaneous Localization and Mapping) results to improve the localization accuracy. Numerical simulations and experiments in an indoor environment are conducted. Results show that 90% of the estimation error is smaller than 2 m to localize a randomly placed transmitter in a 10 x 10 m(2) area.

关键词： Complex environment estimation localization received signal strength robot sensor data processing wireless channel model

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On the Potential of Data-Based Time Synchronization in Wireless sensor Networks for Condition Monitoring 12

On the Potential of Data-Based Time Synchronization in Wirel...

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12th ieee Annual international conference on distributed computing in sensor systems (DCOSS)

作者： Haenel, Thomas Krampe, Florian Gericke, Christoph Aschenbrucle, Nils Univ Osnabruck Inst Comp Sci Albrechtstr 28 D-49076 Osnabruck Germany Corp Technology Dev Albert Einstein Str 16 D-12489 Berlin Germany

ISBN: (纸本)9781509014590

On trains, predetermined maintenance of wheels requires significant amounts of resources. Therefore, it is desirable to replace the scheduled maintenance by a condition-based maintenance strategy, where manual maintenance only takes place when it is actually necessary. For a minimally invasive retrofitting of wagons, a system consisting of a Wireless sensor Network (WSN) powered by energy-harvesting offers the most convenient and least costly solution. However, tight time synchronization and high energy efficiency is essential for a successful realization. Established time synchronization techniques for WSNs do not meet the special requirements for this scenario. Looking for an alternative, we noticed that one of the main components of WSNs, the sensor, has been barely exploited for this problem. We will demonstrate the feasibility of using sensor-data-based time synchronization instead of classical message-based synchronization in wireless networks for the example scenario of on-board wheel diameter measurements on trains. In contrast to popular current time synchronization protocols for WSNs, our approach is compatible with every wireless hardware. We perform a simulative evaluation of our approach on various wireless protocols based on message delay distributions measured on Raspberry Pi.

关键词： Wireless sensor Networks Time Synchronization Condition Monitoring Delay Distribution Wheel Diameter Condition Based Maintenance Data-Based Synchronization

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Cohorts structures for fault-tolerant k entries to a critical section

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ieee TRANSACTIONS ON COMPUTERS 1997年第2期46卷 222-228页

作者： Jiang, JR Huang, ST Kuo, YC NATL TSING HUA UNIV DEPT COMP SCIHSINCHU 30043TAIWAN

We propose a structure named Cohorts to solve the problem of the access control of multiple entries to a critical section. Our solution is formalized as forming quorums in a k-coterie. It is resilient to node failures... 详细信息

关键词： availability coteries distributed systems fault-tolerance mutual exclusion quorums

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Detecting multiple jammers using Fuzzy-Logic Intrusion Detection System (FLIDS) 20

Detecting multiple jammers using Fuzzy-Logic Intrusion Detec...

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20th Annual international conference on distributed computing in Smart sensor systems and the Internet of Things (DCOSS-IoT)

作者： Savva, Michael Ioannou, Iacovos Vassiliou, Vasos Univ Cyprus Dept Comp Sci Nicosia Cyprus CYENS Ctr Excellence Nicosia Cyprus

ISBN: (纸本)9798350369458;9798350369441

This research paper aims to evaluate the efficiency and effectiveness of FLIDS in detecting multiple jamming attacks. The study conducted experiments by placing two jammers at sixteen different positions to examine the system's performance. The experiments were carried out in various scenarios of Contiki 3.1 OS and the Cooja Simulator tool using the Routing Protocol for Low-Power and Lossy Networks (RPL). Furthermore, the optimal time frame for the solution to detect real-time jamming attacks was determined after analyzing the data. The simulation results demonstrate that Fuzzy Logic is an effective technique for recognizing multiple jamming attacks with high accuracy, precision, and recall rate in different scenarios.

关键词： Multiple jamming attacks Intrusion Detection Fuzzy Logic Internet of Things Wireless sensor Networks

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Resource and Subcarriers Allocation for OFDMA based Wireless distributed computing System

Resource and Subcarriers Allocation for OFDMA based Wireless...

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4th ieee international Advance computing conference (IACC)

作者： Ramji, Tangudu Ramkumar, Baratram Manikandan, M. Sabarimalai IIT Bhubaneswar Sch Elect Sci Bhubaneswar 751013 Orissa India

ISBN: (纸本)9781479925711

With the increasing deployment of Wireless sensor Networks (WSN) there has been a demand for power efficient, reliable, Wireless network based distributed computing system (WDC). The fading nature of the wireless channel offer several challenges to WDC over traditional distributed computing system. Orthogonal Frequency Division Multiple Access (OFDMA) based wireless communication systems offer several advantages and are increasingly replacing single carrier communication systems. In this paper we propose resource allocation for OFDMA based wireless distributed computing system. The performance of the proposed system is analyzed using computer simulation.

关键词： Wireless distributed computing system OFDMA

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Efficient Communications in Wireless sensor Networks Based on Biological Robustness 12

Efficient Communications in Wireless Sensor Networks Based o...

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12th ieee Annual international conference on distributed computing in sensor systems (DCOSS)

作者： Nazi, Azade Rajt, Mayank Di Francesco, Mario Ghosh, Preetam Dast, Sajal K. Univ Texas Arlington Dept Comp Sci & Engn Arlington TX 76019 USA Missouri Univ Sci & Tech Dept Comp Sci Rolla MO USA Aalto Univ Dept Comp Sci Espoo Finland Virginia Commonwealth Univ Dept Comp Sci Richmond VA 23284 USA

ISBN: (纸本)9781509014590

Robustness in wireless sensor networks (WSNs) is a critical factor that largely depends on their network topology and on how devices can react to disruptions, including node and link failures. This article presents a novel solution to obtain robust WSNs by exploiting principles of biological robustness at nanoscale. Specifically, we consider Gene Regulatory Networks (GRNs) as a model for the interaction between genes in living organisms. GRNs have evolved over millions of years to provide robustness against adverse factors in cells and their environment. Based on this observation, we apply a method to build robust WSNs, called bio-inspired WSNs, by establishing a correspondence between the topology of GRNs and that of already-deployed WSNs. Through simulation in realistic conditions, we demonstrate that bio-inspired WSNs are more reliable than existing solutions for the design of robust WSNs. We also show that communications in bio-inspired WSNs have lower latency as well as lower energy consumption than the state of the art.

关键词： Wireless sensor networks gene regulatory networks bio-inspired nanoscale properties robustness efficient communications performance evaluation

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Demo: BCG Measurement by differential Sensing in Real-Time 18

Demo: BCG Measurement by differential Sensing in Real-Time

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18th Annual international conference on distributed computing in sensor systems (DCOSS)

作者： Kulau, Ulf Rust, Jochen Albrecht, Urs-Vito Hamburg Univ Technol Smart Sensors Hamburg Germany DSI Aerosp Technol GmbH Bremen Germany Bielefeld Univ Med Fac OWL Dept Digital Med Bielefeld Germany

ISBN: (纸本)9781665495127

We propose a comprehensive health monitoring of astronauts which is based on Ballistocardiography (BCG). BCG uses high-precision accelerometers to measure the motion of the heart at the body surface. In contrast to conventional methods (e.g. Electrocardiography (ECG)), BCG enables the derivation of heart-related parameters that can otherwise only be recorded by imaging methods such as echocardiography. A huge issue is the signal quality of the acceleration measurement, however, by means of differential arrangement of digital acceleration sensors, the signal quality and also the susceptibility to interference can be reduced when measuring the smallest accelerations. In preparation for a BCG experiment on the international Space Station (ISS), a pre-flight measurement system was developed whose architectural design is similar to the flight hardware, but extended by a reference ECG. To simplify measurement campaigns, the simultaneously recorded BCG and ECG data can be visualized in real time, which will be shown in this demo.

关键词： sensor System Ballistocardiography Differential Sensing Accelerometers Health Monitoring Human Spaceflight

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Asynchronous Gossip in Smartphone Peer-to-Peer Networks 17

Asynchronous Gossip in Smartphone Peer-to-Peer Networks

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17th Annual ieee international conference on distributed computing in sensor systems (ieee DCOSS)

作者： Newport, Calvin Weaver, Alex Zheng, Chaodong Georgetown Univ Washington DC 20007 USA Nanjing Univ Nanjing Peoples R China

ISBN: (纸本)9781665439299

In this paper, we study gossip algorithms in communication models that describe the peer-to-peer networking functionality included in most standard smartphone operating systems. We begin by describing and analyzing a new synchronous gossip algorithm in this setting that features both a faster round complexity and simpler operation than the best-known existing solutions. We also prove a new lower bound on the rounds required to solve gossip that resolves a minor open question by establishing that existing synchronous solutions are within logarithmic factors of optimal. We then adapt our synchronous algorithm to produce a novel gossip strategy for an asynchronous model that directly captures the interface of a standard smartphone peer-to-peer networking library (enabling algorithms described in this model to be easily implemented on real phones). Using new analysis techniques, we prove that this asynchronous strategy efficiently solves gossip. This is the first known efficient asynchronous information dissemination result for the smartphone peer-to-peer setting. We argue that our new strategy can be used to implement effective information spreading subroutines in real world smartphone peer-to-peer network applications, and that the analytical tools we developed to analyze it can be leveraged to produce other broadly useful algorithmic strategies for this increasingly important setting.

关键词： gossip distributed algorithms peer-to-peer networks

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Experimental Evaluation of Energy Balance Algorithms in the SenseWALL sensor Network Test-bed

Experimental Evaluation of Energy Balance Algorithms in the ...

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7th ieee international conference on distributed computing in sensor systems (DCOSS)

作者： Angelopoulos, Constantinos Marios Efstathiou, Dionysios Nikoletseas, Sotiris Computer Technology Institute (CTI) and University of Patras Greece

ISBN: (纸本)9781457705137

We present key aspects (hardware, software, topology, networking) of SenseWall, an experimental sensor network test-bed we have created for the implementation and engineering of distributed sensor network algorithms. We then describe how SenseWall has been in particular used to implement two recent state of the art algorithms for energy balanced sensor data propagation. We elaborate on the issues and challenges created by the restrictions and particularities of the experimental test-bed and how we dealt with them. We also carry out a detailed performance evaluation comparing the energy balance protocols to two baseline protocols that include only either single hop or direct data transmissions.

关键词： Batteries Energy consumption Energy measurement Hardware Protocols Radiation detectors Universal Serial Bus baseline protocols data communication data transmissions distributed sensor network algorithms energy balance algorithms energy balance protocols e

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LAACAD: Load bAlancing k-Area Coverage through Autonomous Deployment in Wireless sensor Networks

LAACAD: Load bAlancing <i>k</i>-Area Coverage through Autono...

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32nd ieee international conference on distributed computing systems (ICDCS)

作者： Li, Feng Luo, Jun Xin, Shi-Qing Wang, Wen-Ping He, Ying Nanyang Technol Univ Sch Comp Engn Singapore Singapore Univ Hong Kong Dept Comp Sci Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781457702952

Although the problem of k-area coverage has been intensively investigated for dense wireless sensor networks (WSNs), how to arrive at a k-coverage sensor deployment that optimizes certain objectives in relatively sparse WSNs still faces both theoretical and practical difficulties. In this paper, we present a practical algorithm LAACAD (Load bAlancing k-Area Coverage through Autonomous Deployment) to move sensor nodes toward k-area coverage, aiming at minimizing the maximum sensing range required by the nodes. LAACAD enables purely autonomous node deployment as it only entails localized computations. We prove the convergence of the algorithm, as well as the (local) optimality of the output. We also show that our optimization objective is closely related to other frequently considered objectives. Therefore, our practical algorithm design also contributes to the theoretical understanding of the k-area coverage problem. Finally, we use extensive simulation results both to confirm our theoretical claims and to demonstrate the efficacy of LAACAD.

关键词： Wireless sensor networks area coverage k-coverage autonomous deployment load balancing

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