The Experts below are selected from a list of 8439 Experts worldwide ranked by ideXlab platform

A K Ramani - One of the best experts on this subject based on the ideXlab platform.

  • performance study of token Passing Protocol for traffic multiplicity in optical networks
    International Conference on Parallel Processing, 1999
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    This paper extended a mathematical technique to model the behaviour of token-Passing Protocol in a star-coupled wavelength-division multiplexing (WDM) optical network for traffic multiplicity, based on a semi-Markov process. This analytical model is able to predict the results accurately. It is found that the proposed static priority scheme performs reasonably well in relatively stable and predictable network load. The performance of lower priority traffic can be improved by employing bigger buffer space.

  • analysis of piggybacked token Passing mac Protocol with variable buffer size for wdm star coupled photonic network
    IEEE International Conference on High Performance Computing Data and Analytics, 1996
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    The piggybacked token-Passing Protocol suitable for use with multichannel fibre optic network employing WDM is considered for its performance studies using the semi-Markov modelling technique. The Protocol is then extended to include for a variable buffer size and a priority scheme to examine its suitability in real-time. Various expressions, like average delay and mean queue length are derived in terms of input parameters like the number of nodes, the number of channels and the packet generation rate.

  • ICPP - Performance study of token-Passing Protocol for traffic multiplicity in optical networks
    Proceedings of the 1999 International Conference on Parallel Processing, 1
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    This paper extended a mathematical technique to model the behaviour of token-Passing Protocol in a star-coupled wavelength-division multiplexing (WDM) optical network for traffic multiplicity, based on a semi-Markov process. This analytical model is able to predict the results accurately. It is found that the proposed static priority scheme performs reasonably well in relatively stable and predictable network load. The performance of lower priority traffic can be improved by employing bigger buffer space.

  • HiPC - Analysis of piggybacked token-Passing MAC Protocol with variable buffer size for WDM star coupled photonic network
    Proceedings of 3rd International Conference on High Performance Computing (HiPC), 1
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    The piggybacked token-Passing Protocol suitable for use with multichannel fibre optic network employing WDM is considered for its performance studies using the semi-Markov modelling technique. The Protocol is then extended to include for a variable buffer size and a priority scheme to examine its suitability in real-time. Various expressions, like average delay and mean queue length are derived in terms of input parameters like the number of nodes, the number of channels and the packet generation rate.

  • ICCCN - Dynamic scheduling scheme for handling traffic multiplicity in wavelength division multiplexed optical networks
    Proceedings Eight International Conference on Computer Communications and Networks (Cat. No.99EX370), 1
    Co-Authors: S Selvakennedy, A K Ramani, M.y. M-saman, Veeraraghavan Prakash
    Abstract:

    This paper proposes a dynamic scheduling scheme based on queue length threshold of lower priority traffic for a token-Passing Protocol in a wavelength division multiplexed (WDM) network. Based on a semi-Markov process, the behavior of the proposed scheme is modeled. The performance of the network is studied in terms of average delay, blocking probability and network throughput. The analytical results are validated through simulations. To observe the impact of the proposed scheme, it is compared with the static scheduling scheme by means of two new quality of service (QoS) parameters.

S Selvakennedy - One of the best experts on this subject based on the ideXlab platform.

  • performance study of token Passing Protocol for traffic multiplicity in optical networks
    International Conference on Parallel Processing, 1999
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    This paper extended a mathematical technique to model the behaviour of token-Passing Protocol in a star-coupled wavelength-division multiplexing (WDM) optical network for traffic multiplicity, based on a semi-Markov process. This analytical model is able to predict the results accurately. It is found that the proposed static priority scheme performs reasonably well in relatively stable and predictable network load. The performance of lower priority traffic can be improved by employing bigger buffer space.

  • analysis of piggybacked token Passing mac Protocol with variable buffer size for wdm star coupled photonic network
    IEEE International Conference on High Performance Computing Data and Analytics, 1996
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    The piggybacked token-Passing Protocol suitable for use with multichannel fibre optic network employing WDM is considered for its performance studies using the semi-Markov modelling technique. The Protocol is then extended to include for a variable buffer size and a priority scheme to examine its suitability in real-time. Various expressions, like average delay and mean queue length are derived in terms of input parameters like the number of nodes, the number of channels and the packet generation rate.

  • ICPP - Performance study of token-Passing Protocol for traffic multiplicity in optical networks
    Proceedings of the 1999 International Conference on Parallel Processing, 1
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    This paper extended a mathematical technique to model the behaviour of token-Passing Protocol in a star-coupled wavelength-division multiplexing (WDM) optical network for traffic multiplicity, based on a semi-Markov process. This analytical model is able to predict the results accurately. It is found that the proposed static priority scheme performs reasonably well in relatively stable and predictable network load. The performance of lower priority traffic can be improved by employing bigger buffer space.

  • HiPC - Analysis of piggybacked token-Passing MAC Protocol with variable buffer size for WDM star coupled photonic network
    Proceedings of 3rd International Conference on High Performance Computing (HiPC), 1
    Co-Authors: S Selvakennedy, A K Ramani
    Abstract:

    The piggybacked token-Passing Protocol suitable for use with multichannel fibre optic network employing WDM is considered for its performance studies using the semi-Markov modelling technique. The Protocol is then extended to include for a variable buffer size and a priority scheme to examine its suitability in real-time. Various expressions, like average delay and mean queue length are derived in terms of input parameters like the number of nodes, the number of channels and the packet generation rate.

  • ICCCN - Dynamic scheduling scheme for handling traffic multiplicity in wavelength division multiplexed optical networks
    Proceedings Eight International Conference on Computer Communications and Networks (Cat. No.99EX370), 1
    Co-Authors: S Selvakennedy, A K Ramani, M.y. M-saman, Veeraraghavan Prakash
    Abstract:

    This paper proposes a dynamic scheduling scheme based on queue length threshold of lower priority traffic for a token-Passing Protocol in a wavelength division multiplexed (WDM) network. Based on a semi-Markov process, the behavior of the proposed scheme is modeled. The performance of the network is studied in terms of average delay, blocking probability and network throughput. The analytical results are validated through simulations. To observe the impact of the proposed scheme, it is compared with the static scheduling scheme by means of two new quality of service (QoS) parameters.

Guoli Wang - One of the best experts on this subject based on the ideXlab platform.

  • Cluster based Routing Scheme for Distributed Regression in Wireless Sensor Networks: Gaussian Eliminations
    New Generation Computing, 2010
    Co-Authors: Chaojun Hou, Xuemei Guo, Guoli Wang
    Abstract:

    This paper addresses the issue of the in-network implementation of data regression in wireless sensor networks (WSNs). In particular, a cluster based routing scheme is proposed for achieving the distributed Gaussian elimination in solving the regression algebraic equation. In doing this, the tree structure is incorporated to coordinate the clusters so as to decouple the intersections with each other via a new message Passing Protocol. The cluster based routing scheme proposed here contributes not only to ease network topology management, but also to speed the convergence of distributed computation. Experimental results are reported to illustrate the validation of the proposed approach.

  • HPCC - Cluster Based Routing Scheme for Distributed Regression in Wireless Sensor Networks: Gaussian Eliminations
    2008 10th IEEE International Conference on High Performance Computing and Communications, 2008
    Co-Authors: Chaojun Hou, Xuemei Guo, Guoli Wang
    Abstract:

    This paper presents a cluster based routing scheme to perform the distributed Gaussian elimination algorithm for solving the regression algebraic equation towards to data regression. Under this routing framework, the junction tree structure is incorporated to coordinate the clusters so as to decouple the intersections among the neighboring clusters via a new message Passing Protocol. Simulation-based experimental results are presented. It is shown that the use of synchronous Protocol of message Passing scalably implemented among clusters is more efficient than the purely asynchronous Protocol over entire sensor networks.

Kyung Chang Lee - One of the best experts on this subject based on the ideXlab platform.

  • QoS-based remote control of networked control systems via Profibus token Passing Protocol
    IEEE Transactions on Industrial Informatics, 2005
    Co-Authors: Kyung Chang Lee, Suk Lee, Man Hyung Lee
    Abstract:

    This paper focuses on a quality-of-service (QoS)-based remote control scheme for networked control systems via the Profibus token Passing Protocol. Typically, token Passing experiences random network delay due to uncertainties in token circulation, but the Protocol has in-built upper and lower bounds of network delay. Thus, to ensure the control performance of networked control systems via the Profibus token Passing Protocol, the network delay should be maintained below the allowable delay level. As the network delay is affected by Protocol parameters, such as target rotation time, we present here an algorithm for selection of target rotation time using a genetic algorithm to ensure QoS of control information. We also discuss the performance of the QoS-based remote control scheme under conditions of controlled network delay. To evaluate its feasibility, a networked control system for a feedback control system using a servo motor was implemented on a Profibus-FMS network.

  • Timer selection for satisfying the maximum allowable delay using performance model of profibus token Passing Protocol
    IEEE Transactions on Industrial Electronics, 2004
    Co-Authors: Kyung Chang Lee, Suk Lee, Hyun Hee Kim, Man Hyung Lee
    Abstract:

    Recently, the Fieldbus has become an indispensable component for many automated systems. In the Fieldbus system, real-time data containing sensor values and control commands have a tendency to rapidly lose their value as time elapses after its creation. In order to deliver these data in time, the fieldbus network should be designed to have a short delay compared to the maximum allowable delay. Because the communication delay is affected by performance parameters such as the target rotation timer of token Passing Protocol, it is necessary to select proper parameter settings to satisfy the real-time requirement for communication delay. This paper presents the timer selection method for Profibus token Passing networks using a genetic algorithm to meet the delay requirements.

  • development of performance model for profibus token Passing Protocol
    International Conference on Industrial Informatics, 2003
    Co-Authors: Suk Lee, Kyung Chang Lee, Hyun Hee Kim
    Abstract:

    In many automated systems such as manufacturing systems and process plants, a fieldbus is a very important component for the exchange of various and sometimes crucial information. Some of the information has a tendency to rapidly lose its value as time elapses after its creation. Such information or data is called real-time data that includes sensor values and control commands. In order to deliver these data in time, the fieldbus network should be tailored to have short delay with respect to the individual time limit of various data. Fine-tuning the network for a given traffic requires the knowledge on the relationship between the Protocol parameters such as timer values and the performance measure such as network delay. We present a mathematical performance model to calculate communication delays of the Profibus FMS network when the timer value and the traffic characteristics are given. The results of this model are compared to those from experiments to assess the model's validity.

  • Communication delay properties in performance model of profibus token Passing Protocol
    2003
    Co-Authors: Kyung Chang Lee, Suk Lee, Hyun Hee Kim, Hong-hee Lee
    Abstract:

    In many automated systems such as manufacturing systems and process plants, an industrial network or fieldbus is a very important component for the exchange of various and sometimes crucial information, Some of the information has a tendency to rapidly lose its value as time elapses after its creation. Such information or data is called real-time data that includes sensor values and control commands. In order to deliver these data in time, the fieldbus network should be tailored to have short delay with respect to the individual time limit of various data. Fine-tuning the network for a given traffic requires the knowledge on the relationship between the Protocol parameters such as timer values and the performance measure such as network delay. This paper presents a mathematical performance model to calculate communication delays of the Profibus FMS network when the timer value and the traffic characteristics are given.

  • Development of performance model for calculation of communication delay in Profibus token Passing Protocol
    Computer Standards & Interfaces, 2003
    Co-Authors: Kyung Chang Lee, Hyun Hee Kim, Suk Lee
    Abstract:

    Abstract In many automated systems such as manufacturing systems and process plants, a fieldbus is a very important component for the exchange of various and sometimes crucial information. Some of the information has a tendency to rapidly lose its value as time elapses after its creation. Such information or data is called real-time data that includes sensor values and control commands. In order to deliver these data in time, the fieldbus network should be tailored to have short delay with respect to the individual time limit of various data. Fine-tuning the network for a given traffic requires knowledge on the relationship between Protocol parameters such as timer values and performance measure such as network delay. This paper presents a mathematical performance model to calculate communication delays of the Profibus FMS network when the timer value and the traffic characteristics are given. The results of this model are compared to those from experiments to assess the model's validity.

Man Hyung Lee - One of the best experts on this subject based on the ideXlab platform.

  • QoS-based remote control of networked control systems via Profibus token Passing Protocol
    IEEE Transactions on Industrial Informatics, 2005
    Co-Authors: Kyung Chang Lee, Suk Lee, Man Hyung Lee
    Abstract:

    This paper focuses on a quality-of-service (QoS)-based remote control scheme for networked control systems via the Profibus token Passing Protocol. Typically, token Passing experiences random network delay due to uncertainties in token circulation, but the Protocol has in-built upper and lower bounds of network delay. Thus, to ensure the control performance of networked control systems via the Profibus token Passing Protocol, the network delay should be maintained below the allowable delay level. As the network delay is affected by Protocol parameters, such as target rotation time, we present here an algorithm for selection of target rotation time using a genetic algorithm to ensure QoS of control information. We also discuss the performance of the QoS-based remote control scheme under conditions of controlled network delay. To evaluate its feasibility, a networked control system for a feedback control system using a servo motor was implemented on a Profibus-FMS network.

  • Timer selection for satisfying the maximum allowable delay using performance model of profibus token Passing Protocol
    IEEE Transactions on Industrial Electronics, 2004
    Co-Authors: Kyung Chang Lee, Suk Lee, Hyun Hee Kim, Man Hyung Lee
    Abstract:

    Recently, the Fieldbus has become an indispensable component for many automated systems. In the Fieldbus system, real-time data containing sensor values and control commands have a tendency to rapidly lose their value as time elapses after its creation. In order to deliver these data in time, the fieldbus network should be designed to have a short delay compared to the maximum allowable delay. Because the communication delay is affected by performance parameters such as the target rotation timer of token Passing Protocol, it is necessary to select proper parameter settings to satisfy the real-time requirement for communication delay. This paper presents the timer selection method for Profibus token Passing networks using a genetic algorithm to meet the delay requirements.

  • Remote control for guaranteeing QoC of networked control systems via Profibus token Passing Protocol
    IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468), 1
    Co-Authors: Suk Lee, Kyung Chang Lee, Hyun Hee Kim, Man Hyung Lee
    Abstract:

    This paper focuses on a quality of control (QoC)-based remote control scheme for networked control systems via the Profibus token Passing Protocol. Typically, token Passing experiences random network delay due to uncertainties in token circulation, but the Protocol has in-built upper and lower bounds of network delay. Thus, to ensure the control performance of networked control systems via the Profibus token Passing Protocol, the network delay should be maintained below the allowable delay level. As the network delay is affected by Protocol parameters, such as target rotation time, we present here an algorithm for selection of target rotation time using a genetic algorithm to guarantee QoC of control information. We also discuss the performance of the QoC-based remote control scheme under conditions of controlled network delay. To evaluate its feasibility, a networked control system for a feedback control system using a servomotor was implemented on a Profibus-FMS network.