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检索条件"任意字段=IEEE International Conference on Distributed Computing in Sensor Systems"

共 30763 条记录，以下是341-350 订阅

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Energy Efficient Mechanism for Reusing Mobile Nodes in WSN and IoT Networks 17

Energy Efficient Mechanism for Reusing Mobile Nodes in WSN a...

引用

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

作者： Temene, Natalie Sergiou, Charalampos Ioannou, Christiana Georgiou, Chryssis Vassiliou, Vasos Univ Cyprus Nicosia Cyprus CYENS Ctr Excellence Nicosia Cyprus

ISBN: (纸本)9781665439299

The operation of Internet of Things (IoT) networks and Wireless sensor Networks (WSN) is often disrupted by a number of problems, such as path disconnections, network segmentations, node faults, security attacks, etc. A method that gains momentum in resolving some of those issues is the use of mobile nodes or nodes deployed by mobile robots. The use of mobile elements essentially increases the resources and the capacity of the network. In this work, we propose a scheme that utilizes mobile nodes for the creation of alternative paths from source to sink by also accounting the energy levels of the nodes as a contributing factor regarding the creation of alternative paths. We offer both a high level description of the concept and also a detailed algorithmic solution. The evaluation of the solution was performed in a case study of resolving congestion in the network. Results have shown that the proposed algorithm can significantly contribute to the alleviation of the problem of congestion in IoT and WSNs and can easily be used for other types of network problems.

关键词： Internet of Things Wireless sensor Networks Mobility Reuse Energy Efficient Mobile Nodes

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SELF-CARE: Selective Fusion with Context-Aware Low-Power Edge computing for Stress Detection 18

SELF-CARE: Selective Fusion with Context-Aware Low-Power Edg...

引用

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

作者： Rashid, Nafiul Mortlock, Trier Al Faruque, Mohammad Abdullah Univ Calif Irvine Dept Elect Engn & Comp Sci Irvine CA 92697 USA Univ Calif Irvine Dept Mech & Aerosp Engn Irvine CA USA

ISBN: (纸本)9781665495127

Detecting human stress levels and emotional states with physiological body-worn sensors is a complex task, but one with many health-related benefits. Robustness to sensor measurement noise and energy efficiency of low-power devices remain key challenges in stress detection. We propose SELFCARE, a fully wrist-based method for stress detection that employs context-aware selective sensor fusion that dynamically adapts based on data from the sensors. Our method uses motion to determine the context of the system and learns to adjust the fused sensors accordingly, improving performance while maintaining energy efficiency. SELF-CARE obtains state-of-theart performance across the publicly available WESAD dataset, achieving 86.34% and 94.12% accuracy for the 3-class and 2-class classification problems, respectively. Evaluation on real hardware shows that our approach achieves up to 2.2x (3-class) and 2.7x (2-class) energy efficiency compared to traditional sensor fusion.

关键词： Stress detection edge computing energy efficiency sensor fusion

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S-GinMob: Soft-Handoff Solution for Mobile Users in Industrial Environments

S-GinMob: Soft-Handoff Solution for Mobile Users in Industri...

引用

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

作者： Zinonos, Zinon Vassiliou, Vasos Univ Cyprus Dept Comp Sci Networks Res Lab Nicosia Cyprus

ISBN: (纸本)9781457705137

In current research studies and testbed deployments of sensor networks, individual sensor nodes are usually assumed to be static. However, recent applications require mobile sensor nodes, something that poses unique challenges in aspects like resource management, topology control, and performance. In this paper we propose a novel soft-handoff mobility protocol that provides zero handoff time and zero packet losses. The proposed solution uses cross-layer information from the MAC layer, the Topology Control, and the Performance Debugging modules of the employed architecture. Our solution was implemented and evaluated in a critical scenario inside an oil refinery.

关键词： MAC layer S-GinMob access protocols cross-layer information industrial environment mobile sensor nodes mobile users mobility management (mobile radio) oil refinery oil refining performance debugging modules resource management sensor network soft-handoff

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A Static Multi-Hop Underwater Wireless sensor Network Using RF Electromagnetic Communications

A Static Multi-Hop Underwater Wireless Sensor Network Using ...

引用

29th ieee international conference on distributed computing systems

作者： Che, Xianhui Wells, Ian Kear, Paul Dickers, Gordon Gong, Xiaochun Rhodes, Mark Swansea Metropolitan Univ Swansea W Glam Wales Wireless Fibre Syst Swansea W Glam Wales

ISBN: (纸本)9781424444465

Most underwater sensor networks choose acoustics as the medium for wireless transmission. However, electromagnetic waves also offer great merits for transmission in special underwater environment. A small scale wireless sensor network is deployed using electromagnetic waves with a multi-hop static topology under shallow water conditions where there is a high level of sediment and aeration in the water column. Data delivery is scheduled via daily cycles of sleeping and waking up to transmit. Due to the unique features of the network, ad-hoc on-demand Distance Vector (AODV) is chosen as the routing protocol. Modeling and simulations are conducted to evaluate network performance in terms of failure tolerance, congestion handling, and optimal grid arrangements. The results demonstrate the likely effectiveness of the designated network for this and similar scenarios.

关键词： Underwater Electromagnetic Communications Underwater Wireless sensor Networks Ad-hoc On-Demand Distance Vector

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TIME-SYNCHRONIZATION FREE LOCALIZATION IN LARGE SCALE UNDERWATER ACOUSTIC sensor NETWORKS

TIME-SYNCHRONIZATION FREE LOCALIZATION IN LARGE SCALE UNDERW...

引用

29th ieee international conference on distributed computing systems

作者： Cheng, Wei Thaeler, Andrew Cheng, Xiuzhen Liu, Fang Lu, Xicheng Lu, Zexin George Washington Univ Dept Comp Sci Washington DC 20052 USA Univ Texas Pan Amer Dept Comp Sci Edinburg TX 78541 USA Natl Univ Def Technol Sch Comp Sci Changsha Hunan Peoples R China

ISBN: (纸本)9781424444465

We introduce and study the localization problem in large scale underwater acoustic sensor networks. Considering that depth information is typically available for underwater sensors, we transform the 3D underwater positioning problem into its two-dimensional counterpart via a projection technique. We then introduce a localization scheme specifically designed for large scale acoustic underwater sensor networks. The proposed localization scheme does not require time-synchronization in the network. This scheme relies on time-differences of arrival (TDoA) measured locally at a sensor to detect range differences from the sensor to three anchors that can mutually hear each other We consider variations in the speed of sound and analyze the performance of the proposed scheme in terms of the number of localized nodes, location errors, and the number of reference nodes.

关键词： Underwater acoustic sensor networks localization navigation time-synchronization free projection underwater positioning

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Configuration and Data Processing over a Heterogeneous Wireless sensor Networks

Configuration and Data Processing over a Heterogeneous Wirel...

引用

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

作者： Cecilio, Jose Furtado, Pedro Univ Coimbra Coimbra Portugal

ISBN: (纸本)9781457705137

Whereas software adaptation has been identified as an effective approach for addressing context-aware applications, the existing work on WSNs fails to support context-awareness and mostly focuses on developing techniques to reprogram the whole sensor node rather than reconfiguring a particular portion of the sensor application software. Therefore, enabling adaptively in the higher layers of the network architecture such as the middleware and application layers, beside the consideration in the lower layers, becomes of high importance. In this paper we propose an approach to hide heterogeneity and offer a single common configuration and processing component for all nodes of that heterogeneous system. This advances the current state-of-the-art, by providing a lego-like model whereby a single simple but powerful component is deployed in any node regardless of its underlying differences and the system is able to remotely configure and process data in any node in a most flexible way, since every node has the same uniform API, processing and access functionalities.

关键词： Heterogeneity Middleware distributed systems wireless sensor networks

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A Model for Reliable Uplink Transmissions in LoRaWAN 15

A Model for Reliable Uplink Transmissions in LoRaWAN

引用

15th Annual international conference on distributed computing in sensor systems (DCOSS)

作者： Khan, Furqan Hameed Jurdak, Raja Portmann, Marius Univ Queensland Sch ITEE Brisbane Qld Australia CSIRO Data61 Distributed Sensing Syst Brisbane Qld Australia

ISBN: (纸本)9781728105703

Long range wide area networks (LoRaWAN) technology provides a simple solution to enable low-cost services for low power internet-of-things (IoT) networks in various applications. The current evaluation of LoRaWAN networks relies on simulations or early testing, which are typically time-consuming and prevent effective exploration of the design space. This paper proposes an analytical model to calculate the delay and energy consumed for reliable Uplink (UL) data delivery in Class A LoRaWAN. The analytical model is evaluated using a real network test-bed as well as simulation experiments based on the ns-3 LoRaWAN module. The resulting comparison confirms that the model accurately estimates the delay and energy consumed in the considered environment. The value of the model is demonstrated via its application to evaluate the impact of the number of end-devices and the maximum number of data frame retransmissions on delay and energy consumed for the confirmed UL data delivery in LoRaWAN networks. The model can be used to optimize different transmission parameters in future LoRaWAN networks.

关键词： LoRaWAN Delay Energy Performance Modelling

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On experimentally evaluating the impact of security on ieee 802.15.4 networks

On experimentally evaluating the impact of security on IEEE ...

引用

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

作者： Daidone, Roberta Dini, Gianluca Tiloca, Marco Univ Pisa Dept Ingn Informaz I-56100 Pisa Italy

ISBN: (纸本)9781457705137

ieee 802.15.4 addresses low-rate wireless personal area networks, enables low power devices, and includes a number of security provisions and options (the security sublayer). Security competes with performance for the scarce resources of low power, low cost sensor devices. So, a proper design of efficient and secure applications requires to know the impact that ieee 802.15.4 security services have on the protocol performance. In this paper we present the preliminary results of a research activity aimed at quantitatively evaluating such impact from different standpoints including memory consumption, network performance, and energy consumption. The evaluation exploits a free implementation of the ieee 802.15.4 security sublayer.

关键词： ieee 802.15.4 security performance evaluation

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Bipartite Grid Partitioning of a Random Geometric Graph 13

Bipartite Grid Partitioning of a Random Geometric Graph

引用

13th ieee international conference on distributed computing in sensor systems (DCOSS)

作者： Chen, Zizhen Matula, David W. Southern Methodist Univ Dept Comp Sci & Engn Dallas TX 75275 USA

ISBN: (纸本)9781538639917

We investigate the problem of efficient computation of a partition of a Random Geometric Graph (RGG) into a limited number of densely packed bipartite grid sub graphs. The study focuses on the collection of subgraphs each individually having similar size and structure and the union employing most (e.g. over 85%) of the vertices. The residual vertices we seek to minimize are attributed to the inherent variations in densities of the randomly placed vertices and to any shortcomings of our greedy algorithms. RGG's have been extensively employed in recent times to model the deployment of numerous instances of Wireless sensor Networks (WSN's) Pl. The properties investigated in our selected bipartite grid backbones are those deemed most relevant for applications to the foundations of this widely growing field. distributed algorithms are primarily used to determine backbones. Our results review what backbone grid partitions exist in the data. This provides a metric to measure the effectiveness of any distributed algorithm against an existing optimal result. The visual display of selected backbone grids suggests local algorithm design strategies. Furthermore, these partitions must be efficiently computable for highly scalable computation, e.g. WSN's with 100's of thousands of vertices and millions of edges in the resulting RGG. We consider distributions over a segment of the plane and over the surface of the sphere to model sensor distributions both in limited planar regions, all around the globe or on distant planets.

关键词： Random Geometric Graph Wireless sensor Network Bipartite Subgraph Grid Partitioning Linear Time Algorithm

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Wireless sensor Network Data Description and Encoding in Heterogeneous Building systems

Wireless Sensor Network Data Description and Encoding in Het...

引用

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

作者： Conway, Chris Barnes, Matthew Univ Edinburgh Sch Informat Ctr Speckled Comp Edinburgh EH8 9AB Midlothian Scotland

ISBN: (纸本)9781457705137

This paper presents initial results and future directions for data description and payload encodings for heterogeneous networks in IP based building intelligence systems. The efficiency of several open standards for sensor data representation are evaluated along with a consideration of the complexity of implementation and suitability for use in development of 6lowPAN based intelligent building systems. A combination of a simplified generic XML schema for data description combined with Google Protobuffer encoding is suggested as the basis for further development of the architecture as this combines simple, platform independent implementation for developers with efficient compression and payload encoding for limited bandwidth 6lowPAN networks.

关键词： Architecture Buildings Encoding Google Protobuffer Internet Internet protocol Payloads Protocols Wireless sensor networks XML XML schema building management systems data description data encoding data handling heterogeneous network intelligent building sy

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