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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101-110 订阅

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Scalable Channels Allocation in Smart Environments Considering Cross-Interference 17

Scalable Channels Allocation in Smart Environments Consideri...

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

作者： Rocha, Alexandre Mosca, Eduardo E. da Silva, Gabriel G. Gomes, Rafael L. State Univ Ceara UECE Fortaleza Ceara Brazil

ISBN: (纸本)9781665439299

Recently, the Internet of Things (IoT) arose as paradigm to evolve the daily tasks and to deploy new intelligent services in the environments, turning them into Smart Environments (SEs). A SE is composed of heterogeneous wireless devices, where part of them are mobile. These heterogeneous devices suffer a problem of cross-interference, since most of them use the 2.4 GHz Industrial, Scientific and Medical bands ISM for communication. The cross-interference problem affects directly the Quality of Service (QoS), mainly the low transmission power devices that provide the basis of the services running on the top of the network. Within this context, this paper presents the Scalable Cross-Interference Mitigation (SCIM), an algorithm to mitigate the cross-interference problem in smart environments. The SCIM algorithm considers the mobility of the devices and their communication capacity to perform a scalable wireless channels assignment. The results, from the experiments performed, suggest that the SCIM algorithm minimizes the total interference of the SE, while increases the packet delivery, when compared to existing approaches.

关键词： Performance evaluation Wireless communication Wireless sensor networks Interference Quality of service Channel allocation Turning

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Soft Handover Method for Mobile Wireless sensor Networks Based on 6LoWPAN

Soft Handover Method for Mobile Wireless Sensor Networks Bas...

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

作者： Petajajarvi, Juha Karvonen, Heikki Univ Oulu Ctr Wireless Commun Oulu Finland

ISBN: (纸本)9781457705137

In many wireless sensor network applications the sensor nodes needs to be mobile. In order to support mobility, the management of several issues, such as routing, handover, security, addressing and auto-configuration of the network needs to be handled. In the past, the main focus of sensor network research has been on static sensor networks, therefore many mobility related problems remain unsolved. In this paper, the focus is on the management of handover and addressing in networks, where gateways and sensor nodes can be mobile. A novel approach, which eliminates unnecessary handovers in the case where multiple gateways are in the range of mobile sensor node, is introduced in this paper. The proposed soft handover method has been implemented and its functionality has been proven in a full-scale testbed. Furthermore, it has been evaluated that the soft handover method performs fairly well also in the sensor network, where gateways are static. The proposed solution is designed for ieee 802.15.4 standard based sensor networks which use 6LoWPAN technique, but it can be easily adapted also to other type of networks.

关键词： Handover wireless sensor network (WSN) mobility

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Optimal Deployment of Dense WSN for Error Bounded Air Pollution Mapping 12

Optimal Deployment of Dense WSN for Error Bounded Air Pollut...

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

作者： Boubrima, Ahmed Bechkit, Walid Rivano, Herve Univ Lyon Inria INSA Lyon CITI F-69621 Villeurbanne France

ISBN: (纸本)9781509014590

Air pollution has become a major issue of modern megalopolis because of industrial emissions and increasing urbanization along with traffic jams and heating/cooling of buildings. Monitoring urban air quality is therefore required by municipalities and by the civil society. Current monitoring systems rely on reference sensing stations that are precise but massive, costly and therefore seldom. In this ongoing work, we focus on an alternative or complementary approach, using a network of low cost and autonomic wireless sensors, allowing for a finer spatiotemporal granularity of air quality sensing. We tackle the optimization problem of sensor deployment and propose an integer programming model, which allows to find the optimal network topology while ensuring air quality monitoring with a high precision and the minimum financial cost. Most of existing deployment models of wireless sensor networks are generic and assume that sensors have a given detection range. This assumption does not fit pollutant concentrations sensing. Our model takes into account interpolation methods to place sensors in such a way that pollution concentration is estimated with a bounded error at locations where no sensor is deployed.

关键词： Air quality monitoring Wireless sensor networks deployment error bounded mapping

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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...

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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 Virtual Sink-based Strategy for Reducing the Funneling Effect in ieee 802.15.4 DSME Networks 18

A Virtual Sink-based Strategy for Reducing the Funneling Eff...

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

作者： Gonzalez, Ivonne Andrea Mantilla Turau, Volker Hamburg Univ Technol Inst Telemat Hamburg Germany

ISBN: (纸本)9781665495127

The MAC protocol ieee 802.15.4 DSME has features for WSNs to support exigent requirements such as high reliability and adaptability to dynamic traffic. This work introduces the concept of a virtual sink, which comprises the sink and its 1-hop neighbors, a.k.a. satellites, as the core of a strategy to alleviate the burden caused by the funneling effect in data collection scenarios. Our strategy enables the coexistence of a centralized scheduling algorithm at the virtual sink and a decentralized scheduling algorithm for the remaining nodes of the network. Through a simulative assessment, we compare the performance of the virtual sink-based strategy with the status quo of DSME via a decentralized slot scheduler TPS. Results show an improvement of the network throughput of up to 38% and a reduction of the energy consumption of about 30% at satellites.

关键词： Funneling effect ieee 802.15.4 DSME virtual sink heuristic scheduling algorithm.

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Energy Efficient Data Collection via Supervised In-Network Classification of sensor Data 12

Energy Efficient Data Collection via Supervised In-Network C...

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

作者： Rossi, Lorenzo A. Krishnamachari, Bhaskar Kuo, C. -C. Jay Univ Southern Calif Ming Hsieh Dept Elect Engn Los Angeles CA 90089 USA

ISBN: (纸本)9781509014590

In wireless sensor networks, data collection (or gathering) is the task of transmitting rounds of measurements of physical phenomena from the sensor nodes to a sink node. We study how to increase the efficiency of data collection via supervised in-network classification of rounds of measurements. We assume that the end users of the data are interested only in rounds characterized by certain patterns. Hence the wireless sensor network uses classification to select the rounds of measurements that are transmitted to the base station. The energy consumption is potentially reduced by avoiding the transmission of rounds of measurements that are not of interest to the end users. Innetwork classification requires distributed feature extraction and transmission. Such tasks can be less or more energy expensive than the transmission of measurements without classification. We provide analytical results and simulations on real data to show requirements and key trade-offs for the design of in-network data classification systems that can improve the collection efficiency. Besides, we study the impact of spatial subsampling of the sensor data (a way to further decrease energy consumption) on the classification performance.

关键词： Classification (of information)

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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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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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LOCALIZED ENERGY EFFICIENT ROUTING FOR WIRELESS sensor NETWORKS

LOCALIZED ENERGY EFFICIENT ROUTING FOR WIRELESS SENSOR NETWO...

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

作者： Cevik, T. Zaim, A. Halim

ISBN: (纸本)9781457705137

With the evolution of electronics, wireless sensor networks have been very popular in many domains of human life such as health, industry and military. This popularity has taken the attention on to the researches about wireless sensor networks. Wireless sensor Networks are especially very favorable in conditions where it is physically difficult and dangerous for human being to gather information. Therefore, lifetime of those networks must be prolonged as much as possible, since it will be also infeasible to replace the energy depleted sensors with the new ones deployed in such geographical areas that are difficult and dangerous for human being to enter. In this paper, we present a localized energy aware routing method LEERA-MS and an alternative LEERA-MS-TH method that are used incorporation with an energy efficient sleep-wakeup schedule which is included with pipelining mechanism we have proposed before. Employing multiple sinks improve the performance by providing the fairly distribution of the load. Simulation results show that this routing method applied on a multiple sinks topology when employed together with the pipelined sleep-wakeup schedule provides 40% longer lifetime for wireless sensor networks.

关键词： Wireless sensor networks energy efficiency routing power aware

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Measuring People-Flow Through Doorways using Easy-to-Install IR Array sensors 13

Measuring People-Flow Through Doorways using Easy-to-Install...

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

作者： Mohammadmoradi, Hessam Munir, Sirajum Gnawali, Omprakash Shelton, Charles Univ Houston Dept Comp Sci Houston TX 77204 USA Bosch Res & Technol Ctr Pittsburgh PA USA

ISBN: (纸本)9781538639917

People counting has many applications in smart buildings. For example, adjusting HVAC systems based on the number of occupants in each room can save a significant amount of energy. In addition, security and safety of the building can be managed by determining the number and location of occupants. Different technologies and sensing platforms have proposed for accurate and efficient people counting. However, these solutions are expensive, hard to deploy, or privacy invasive. We investigate the possibility of placing an 8 x 8 IR array sensor at the doorways and counting the number of people inside rooms. Our solution is real-time, inexpensive, privacy preserving with much less deployment constraints compared to its competitors. The proposed solution deals with realistic and dynamic changes in the sensing environment by leveraging a combination of Otsu's thresholding and modeling thermal noise distribution. We evaluated our solution via several controlled and uncontrolled real-world environments. The results show an average of 93% accuracy in estimating the number of occupants in rooms.

关键词： Temperature sensors sensor arrays Buildings Privacy Temperature Estimation Cameras

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