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检索条件"任意字段=9th IEEE International Conference on Distributed Computing in Sensor Systems, DCoSS 2013"

共 236 条记录，以下是151-160 订阅

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the optimal transmitting power in randomly deployed heterogeneous Wireless sensor Networks for predetermined average node degree

The optimal transmitting power in randomly deployed heteroge...

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9th international Wireless Communications and Mobile computing conference (IWCMC)

作者： Fersi, Ghofrane Louati, Wassef Ben Jemaa, Maher Univ Sfax Natl Sch Engineers Sfax Dept Comp Sci & Appl Math Res Unit Dev & Control Distributed Applicat ReDCA Sfax 3038 Tunisia

ISBN: (纸本)9781467324809

Radio communications are the most important sources of energy consumption in Wireless sensor Networks (WSN). Optimizing the sensors transmitting power with keeping the required nodes average degree preserves significantly the sensors energy. In this paper, we analyze the optimal transmitting power needed by each sensor to reach a given average node degree in heterogeneous WSN. the problem that we aim solving in this paper is the following: given a set of heterogeneous sensors having various capabilities: weak nodes and strong nodes that are scattered randomly in a field according to a Poisson Point Process with densities lambda(1) and lambda(2) respectively. What is the optimal transmitting power needed by each sensor to ensure k-average degree? We investigate also a related problem: What has the most important effect on weak nodes transmitting power: the quantity of the strong nodes or their quality in terms of energy supply? Our analytical study has been validated with Monte-Carlo simulations.

关键词： Optimal transmitting power nodes average degree heterogenoeous Wireless sensor Networks Poisson distribution

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Linked Services for M2M communication with Enterprise IT systems

Linked Services for M2M communication with Enterprise IT sys...

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9th international Wireless Communications and Mobile computing conference (IWCMC)

作者： thoma, Matthias Antonescu, Alexandru-Florian Mintsi, theano Braun, Torsten SAP Switzerland Inc SAP Res Switzerland Althardstr 80 CH-8105 Regensdorf Switzerland Univ Bern CDS Res Grp CH-3012 Bern Switzerland

ISBN: (纸本)9781467324809

Linking the physical world to the Internet, also known as the Internet of things, has increased available information and services in everyday life and in the Enterprise world. In Enterprise IT an increasing number of communication is done between IT backend systems and small IoT devices, for example sensor networks or RFID readers. this introduces some challenges in terms of complexity and integration. We are working on the integration of IoT devices into Enterprise IT by leveraging SOA techniques and Semantic Web technologies. We present a SOA based integration platform for connecting WSNs and large enterprise business processes. For ensuring interoperability our platform is based on Linked Services. these are thoroughly described, machine-readable, machine-reasonable service descriptions.

关键词： wireless sensor network wsn enterprise it business integration service descriptions linked data

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Consistency Analysis of sensor Data Distribution

Consistency Analysis of Sensor Data Distribution

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9th international Wireless Communications and Mobile computing conference (IWCMC)

作者： Reali, Gianluca Femminella, Mauro Univ Perugia Dipartimento Ingn Elettron & Informaz I-06100 Perugia Italy

ISBN: (纸本)9781467324809

In this paper we analyze the probability of consistency of sensor data distribution systems (SDDS), and determine suitable evaluation models. this problem is typically difficult, since a reliable model taking into account all parameters and processes which affect the system consistency is unavoidably very complex. the simplest candidate approach consists of modeling the state sojourn time, or holding time, as memoryless, and resorting to the well known solutions of Markovian processes. Nevertheless, it may happen that this approach does not fit with some working conditions. In particular, the correct modeling of the SDDS dynamics requires the introduction of a number of parameters, such as the packet transfer time or the packet loss probability, the value of which may determine the suitability of unsuitability of the Markovian model. Candidate alternative solutions include the Erlang phase-type approximation of nearly constant state holding time and a more refined model to account for overlapping events in semi-Markov processes.

关键词： information distribution systems consistency Markov processes Semi-Markov processes Erlang distribution

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Approximating the Geographical Area of a Wireless Ad-Hoc Network

Approximating the Geographical Area of a Wireless Ad-Hoc Net...

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ieee 9th international conference on Wireless and Mobile computing, Networking and Communications (WiMob)

作者： Geibig, Joanna Milic, Bratislav Zuse Inst Berlin Dept Parallel & Distributed Syst Berlin Germany Humboldt Univ Dept Comp Sci Berlin Germany

ISBN: (纸本)9781457720147

Wireless ad-hoc networks are typically deployed in a decentralized way, without an authority that determines the location of nodes or the time they join the network. Additionally, existing nodes may fail during network lifetime. Consequently, the geographical span (area) of the network is irregular and unknown. However, if known, this information can be used to improve efficiency of many wireless applications;in some existing applications this information is necessary for their operation in the real use cases. For this purpose, we propose a distributed algorithm that determines the geographical network area. It is the first algorithm that simultaneously discovers network border, approximates the network area with a data structure of a constant size, and disseminates this information to all network nodes. Our algorithm uses only the nodes' local information, has a constant computational complexity and is resilient to link unreliability. the algorithm is evaluated by simulation on realistic network topologies of different sizes. the simulations demonstrate that the algorithm has high accuracy in its estimation of the network area, scales well with the number of nodes, and that it creates a low communication overhead.

关键词： wireless ad-hoc networks wireless sensor networks network border network area approximation

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Intuitive Interaction with Multiple Displays using Orientation-sensor-enabled Smartphones

Intuitive Interaction with Multiple Displays using Orientati...

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ieee 9th international conference on Wireless and Mobile computing, Networking and Communications (WiMob)

作者： Fu, Hao She, James Hong Kong Univ Sci & Technol Dept Elect & Comp Engn HKUST NIE Social Media Lab Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781457720147

Digital displays have been extensively used at various indoor and outdoor venues to provide updated information to the audiences. With the pervasiveness of the smartphones nowadays, it is possible to utilize smartphones to design new interactive display systems. Although many such systems have been proposed, none of them address the issue of supporting interaction with multiple displays. A new solution is proposed in this paper to allow users to use smartphone sensors to intuitively interact with multiple displays at one venue. this approach is based on azimuth angle measured by the smartphone's orientation sensor, and situation abstraction which eliminates the use of location information. Each display at the venue is optimally assigned with an azimuth angle range. A smartphone constantly measures its azimuth angle. If it is within the azimuth angle ranges of a particular display, the smartphones presumes the user is interested to interact with this display. As a result, a user can interact with the desired display intuitively by pointing his/her smartphone at it, and switch smoothly from one display to another by changing smartphone's orientation.

关键词： Smartphone Azimuthal angle POSITION INFORMATION Venue Consumers Audiences

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Pose Calibrations for Inertial sensors in Rehabilitation Applications

Pose Calibrations for Inertial Sensors in Rehabilitation App...

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ieee 9th international conference on Wireless and Mobile computing, Networking and Communications (WiMob)

作者： Morton, Lee Baillie, Lynne Ramirez-Iniguez, Roberto Glasgow Caledonian Univ Dept Comp Creat & Interact Technol Glasgow G4 0BA Lanark Scotland

ISBN: (纸本)9781457720147

Inertial motion capture systems are now used across a broad range of applications where optical motion capture systems would traditionally be used. the decreasing cost of building inertial sensors has prompted many researchers to build inertial motion capture systems for use in rehabilitation applications where they are used to track body movement. Pose calibrations are the standard method used to estimate and correct for body-sensor alignment when using inertial sensors but they have the potential to introduce a systematic error that is carried through the whole usage session. Pose calibrations are the only suitable method for inexpert users and interactive applications. Validation of the pose calibration methods is carried out using an optical motion capture system. the accuracy of the pose calibration is tested under several practical variations of the technique, we quantify the approximate errors that can be introduced by variations of the implementation and on the choice of pose used. Finally we make recommendations on how an improved pose calibration scheme should be implemented.

关键词： inertia sensor motion capture Calibration building costs inertial Motion body movement Systematic errors Lake Restoration Rehabilitation

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Low Energy Geographical Routing Protocol for Wireless Multimedia sensor Networks

Low Energy Geographical Routing Protocol for Wireless Multim...

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9th international Wireless Communications and Mobile computing conference (IWCMC)

作者： Bennis, I. Zytoune, O. Aboutajdine, D. Fouchal, H. Univ Mohammed V Agdal Fac Sci Unite Associee CNRST URAC29 LRIT Rabat Morocco Univ Reims CReSTIC Reims France

ISBN: (纸本)9781467324809

the field of wireless multimedia sensor networks(WMSN) is attracting more and more research community as an interdisciplinary field of interest. this type of network is low-cost, multifunctional due to advances in micro-electromechanical systems, and the proliferation and progression of wireless communications. However transmit multimedia information captured must satisfy the criteria of QoS, which increases energy consumption, fact that should be taken into consideration in the design of any routing protocols for WMSNs. In this paper we present routing protocol which we call an Energy Aware TPGF (EA-TPGF), that improves the Two Phase geographical Greedy Forwarding (TPGF). the basic idea is to take into account the residual energy of the nodes in the identification of pathways. Simulations and statistics produced by the simulator NeTtopo showing a significant contribution with regard to the extension of the life of the network.

关键词： WMSN TPGF EA-TPGF Energy Routing protocol QoS

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Reciprocal Public Sensing for Integrated RFID-sensor Networks

Reciprocal Public Sensing for Integrated RFID-Sensor Network...

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9th international Wireless Communications and Mobile computing conference (IWCMC)

作者： Al-Turjman, Fadi M. Al-Fagih, Ashraf E. Alsalih, Waleed M. Hassanein, Hossam S. Queens Univ Sch Comp Kingston ON K7L 3N6 Canada

ISBN: (纸本)9781467324809

Public sensing is an application in which sensory systems embedded in smart devices, vehicles, residential and public spaces form a collective cloud of data sources from which multi-owned access points realize end-users' service requests. this conception can be further extended under the umbrella of integrated RFID-sensor Networks (RSNs) to include RFID systems. Such a configuration is heterogeneous by nature and faces many challenges in terms of data delivery and resource management. In this paper, we represent a Reciprocal Public Sensing (RPS) scheme for integrated RSN architectures. Our scheme incorporates heuristic solutions for static sensors and mobile data collectors, in addition to a reciprocal agreement for data exchange over the tiers of the proposed architecture adhering to the social welfare of the network as a whole. We provide simulation results showing how RPS outperforms other data delivery schemes in terms of minimizing delay, packet loss, and energy consumption, in addition to prolonging the overall network lifetime.

关键词： RFID WSN delay lifetime reciprocal agreement

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Control System for Workplace Safety in a Cargo Terminal

Control System for Workplace Safety in a Cargo Terminal

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9th international Wireless Communications and Mobile computing conference (IWCMC)

作者： Sole, Mariella Musu, Claudia Boi, Fabrizio Giusto, Daniele Popescu, Vlad Univ Cagliari Dept Elect & Elect Engn I-09123 Cagliari Italy Transilvania Univ Brasov Dept Elect & Comp RO-500019 Brasov Romania

ISBN: (纸本)9781467324809

Large industrial environments and specifically cargo terminals are inherently very complex systems to be monitored and controlled, given the presence of vessels, vehicles, people and industrial or commercial plants. In this context, dominated by strict regulations for workplace safety, a centralized control system for monitoring, reporting and preventing workplace risks can have a particular importance. this work describes the concepts of a real-time control system for acquiring and processing information for the continuous monitoring of workplace safety conditions. In the proposed system, we make use of specialized wearable sensor networks and specific aggregation methods, CCTV cameras combined with pattern recognition algorithms and data networks. the goal of the control system is to offer a detailed, constantly updated overview of the port's situation in terms of workplace safety.

关键词： cargo terminal workplace safety BAN sensor networks image processing feature detection

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Optimized Transmitted Antenna Power Indoor Planning using distributed Antenna systems

Optimized Transmitted Antenna Power Indoor Planning using Di...

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9th international Wireless Communications and Mobile computing conference (IWCMC)

作者： Atawia, Ramy Ashour, Mohamed El Shabrawy, Tallal Hammad, Hany German Univ Cairo Egypt

ISBN: (纸本)9781467324809

this paper aims to optimize the indoor planning of distributed antenna systems (DAS). the objective of the optimization is to find the number of deployed antennas, their optimal locations and the power transmitted from each antenna. the optimal configuration should minimize the deployment cost, maximize wireless coverage while minimizing power leakage outside a building. One of the main challenges in this problem is that in DAS all antennas are fed from the same base station. this means that the total power transmitted is constant and hence increasing the power assigned to one antenna would require decreasing the power on all other antennas. Similarly adding an antenna would require decreasing the power assigned to existing antennas. Previous approaches simplified the problem by assuming equal transmitted power from all antennas in the DAS, and they ignored the fact that the sum of these powers should remain constant. this paper provides a new multi-objective formulation for indoor DAS planning that considers a fixed total transmitted power constraint. the paper proposes a solution method that uses simulated annealing with smart neighborhood search steps to reach a near optimal solution. Results showed that the proposed formulation obtained better indoor DAS configuration and that including antenna power in the optimization provided a solution that contain less antennas and better average power compared to the equal power configuration.

关键词： Indoor planning distributed antenna systems multi-objective Optimization methods

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