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

共 3168 条记录，以下是121-130 订阅

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Energy Efficient Handover in HetNets Using ieee 802.21

Energy Efficient Handover in HetNets Using IEEE 802.21

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9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Coskun, Gurkan Hokelek, Ibrahim Cirpan, Hakan Ali Istanbul Tech Univ TR-80626 Istanbul Turkey

ISBN: (纸本)9781479946181

Along with the widespread usage of mobile devices supporting multiple radio interfaces, users can connect to the mobile operator's network using different access technologies such as UMTS, WLAN and WiMAX/LTE. Depending on the network conditions and the QoS requirements of users, the usage of the right technology at the right time can provide more effective networking with higher data rate, lower cost, longer battery duration, and higher coverage area. To enable this networking effectiveness, a seamless handover mechanism to minimize service disruption is required. ieee 802.21, which defines a set of standards for media independent handover, is capable of realizing both horizontal and vertical handovers. In this paper, a new algorithm is proposed to provide energy efficient handovers among UMTS, WiMAX, and WLAN networks. The proposed algorithm is implemented within the ieee 802.21 framework and its performance analysis is performed using the ns-2.29 simulator. Simulation results show that the proposed algorithm significantly increases the service duration and hence decreases packet losses by dynamically changing the video downloading rate according to handover decisions and the remaining battery power levels.

关键词： HetNets 802.21 handover energy efficiency

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Modelling and Performance Analysis of Wireless sensor Networks Using Process Mining Techniques: ContikiMAC use case

Modelling and Performance Analysis of Wireless Sensor Networ...

引用

9th ieee international conference on distributed computing in sensor systems (dcoss)

作者： Despaux, Francois Song, Ye-Qiong Lahmadi, Abdelkader Univ Lorraine LORIA F-54500 Vandoeuvre Les Nancy France

ISBN: (纸本)9781479946181

In the current protocol stack for Internet of Things in general and wireless sensor network in particular, many devices rely on the ContikiMAC protocol at their MAC layer. This protocol is widely used and enabled by default for several industrial environments and time sensitive monitoring and control applications. However, few work exists regarding the performance of this protocol because it lacks of an underlying theoretical model for analysing its performance. In this paper, we propose a novel approach relying on process mining technique that aims to obtain a Markov chain model for networks running the ContikiMAC protocol. In particular, we present a comprehensive specification of the protocol and a Markov chain model obtained through the analysis and instrumentation of its reference implementation. We used the obtained Markov chain to analyze and estimate the end to end delay distribution for a multi-hops transmission with static routing. The approach can also be extended to a wide range of protocols.

关键词： MAC Protocols Markov chain Process Mining Network performance

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A Wireless sensor Network for Soccer Team Monitoring

A Wireless Sensor Network for Soccer Team Monitoring

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

作者： Garcia, Miguel Catala, Angel Lloret, Jaime Rodrigues, Joel J. P. C. Univ Politecn Valencia Integrated Management Coastal Res Inst Valencia Spain Univ Beira Interior Inst Telecommun Beira Portugal

ISBN: (纸本)9781457705137

One of the most desirable issues in team sports is to know how the physical state of each sportsman or sportswoman is performing during the match. Concretely, a soccer match is 90 minutes long and the players could be more or less tired depending on the dynamic of the soccer game (fast or slow) and on the place where the ball have been rolling (which affects more to one users than others). This paper presents a wireless sensor network proposal for soccer team players' remote monitoring. Each player has a wireless body sensor and each player will be a sensor node in the wireless sensor network. The approach allows knowing the physical state of each player during the whole match. In order to have fast updates and larger connection times to the gateways, the information can be routed through the players of both teams. We focus our study in the network topology and in the mobility model of the soccer players.

关键词： Wireles sensor Network Wireless Body sensor Network mobility soccer

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Architecture for Wireless sensor and Actor Networks Control and Data Acquisition

Architecture for Wireless Sensor and Actor Networks Control ...

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

作者： Lameski, Petre Zdravevski, Eftim Kulakov, Andrea Davcev, Danco Univ Ss Cyril & Methodius Fac Comp Sci & Engn Skopje Macedonia

ISBN: (纸本)9781457705137

Wireless sensor and Actor Networks (WSANs) have received increased attention from the research community in the recent years. This is mainly because as an extension to Wireless sensor Networks(WSN), they have the ability to actively participate in the environment trough the actors. However, this introduces new challenges as to how to transfer commands between nodes, actors and central station who may be from different manufacturers and use different communication protocols. Another important aspect is the ability of the WSAN to present the data to the interested party or to receive the command from the operator, and do this with in the simplest and most user friendly way as possible. In this paper we propose architecture for interconnection between different layers of WSANs and the central stations that would allow building a simple interface that would ease the operation with WSANs in view of Control and Data Acquisition.

关键词： component Wireless sensor and Actor Networks Remote Data Acquisition Control Interface

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Work-in-Progress: A New Random Walk for Data Collection in sensor Networks

Work-in-Progress: A New Random Walk for Data Collection in S...

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

作者： Angelopoulos, Constantinos Marios Nikoletseas, Sotiris Patroumpa, Dimitra Raptopoulos, Christoforos Univ Patras GR-26110 Patras Greece

ISBN: (纸本)9781457705137

Motivated by the problem of efficient sensor network data collection via a mobile sink, we present undergoing research in accelerated random walks on Random Geometric Graphs. We first propose a new type of random walk, called the alpha-stretched random walk, and compare it to three known random walks. We also define a novel performance metric called Proximity Cover Time which, along with other metrics such us visit overlap statistics and proximity variation, we use to evaluate the performance properties and features of the various walks. Finally, we present future plans on investigating a relevant combinatorial property of Random Geometric Graphs that may lead to new, faster random walks and metrics.

关键词： Acceleration Ad hoc networks Measurement Memory management Mobile communication System recovery Wireless sensor networks data collection geometry mobile sink proximity cover time random geometric graph random walk wireless sensor networks wireless sensor

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Secure Pairwise Broadcast Time Synchronization in Wireless sensor Networks

Secure Pairwise Broadcast Time Synchronization in Wireless S...

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

作者： Benzaid, Chafika Saiah, Amin Badache, Nadjib LSI USTHB Alg&#x00E9 rie

ISBN: (纸本)9781457705137

Most wireless sensor network (WSN) applications require a synchronized local clock in sensor nodes. One promising approach to achieve time synchronization in WSN, with significantly reduced energy consumption, is the Receiver-Only synchronization approach. However, to the best of our knowledge, there has been no previous published work addressing the security issue of this approach. So, our contribution consists in proposing a secure version for this approach. We show that our scheme is resilient to various attacks, namely sybil attacks, message manipulation attacks, replay attacks, delay attacks, wormhole attacks, and misleading attacks. These security features are achieved by the use of public key cryptography-based authentication scheme, random nonce, and threshold-based delay attack detection.

关键词： Authentication Delay Protocols Synchronization WSN Wireless sensor networks energy consumption message authentication message manipulation attacks pairwise broadcast time synchronization private key cryptography public key cryptography-based authenticatio

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Trade off between Accuracy and Message Complexity for Approximate Data Aggregation 18

Trade off between Accuracy and Message Complexity for Approx...

引用

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

作者： Nugroho, Saptadi Weinmann, Alexander Schindelhauer, Christian Albert Ludwigs Univ Freiburg Freiburg Germany

ISBN: (纸本)9781665495127

We consider large scale Peer-to-Peer sensor Networks, which try to calculate and distribute the mean value of all sensor inputs. For this we design, simulate and evaluate distributed approximation algorithms which reduce the number of messages. The main difference of these algorithms is the underlying communication protocol which all use the random call model, where in discrete round model each node can call a random sensor node with uniform probability. The amount of data exchanged between sensor nodes and used in the calculation process affects the accuracy of the aggregation results leading to a trade-off situation. The key idea of our algorithms is to limit the sample size using the Finite Population Correction (FPC) method and collect the data using a distribution aggregation using Push-Pull Sampling, Pull Sampling, and Push Sampling communication protocols. It turns out that all methods show exponential improvement of Mean Squared Error (MSE) with the number of messages and rounds.

关键词： data aggregation sensor network message complexity approximation random call model

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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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A Framework for Flexible sensor Information Dissemination

A Framework for Flexible Sensor Information Dissemination

引用

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

作者： Corujo, Daniel Lebre, Marcelo Gomes, Diogo Aguiar, Rui Univ Aveiro Inst Telecomunicacoes P-3800 Aveiro Portugal

ISBN: (纸本)9781457705137

The integration of the digital world into every aspect of our lives is becoming more and more preeminent. Nowadays, not only humans but also devices and the environments where we dwell are also able to provide their own information, through the usage of sensors. Through their interconnection over communication networks, sensors enable Ambient Intelligent scenarios achieving a true Internet of Things, and crossing the gap between computer systems and the real world. However, the different sensing devices and information generated by them, are of such disparate nature that it becomes increasingly difficult to access and make use of such heterogeneous data. In this paper, we propose a framework which not only considers a media independent information access to sensors and their supplied data, but is also flexible enough to configure and provide different means to best transport collected sensor information via wireless gateways, facilitating its deployment in different scenarios. We demonstrate its usefulness by providing a throughput efficient approach towards the collection and dissemination of sensing data, through sensing information compression and aggregation of multiple sources.

关键词： Media Independent IoT M2M sensors

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A Model for Reliable Uplink Transmissions in LoRaWAN 15

A Model for Reliable Uplink Transmissions in LoRaWAN

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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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