The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

José Augusto M. Nacif - One of the best experts on this subject based on the ideXlab platform.

  • LCN - Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.

  • Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.

Racyus Pacífico - One of the best experts on this subject based on the ideXlab platform.

  • LCN - Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.

  • Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.

Rudy Raymond - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of transient queues with semidefinite optimization
    Queueing Systems, 2012
    Co-Authors: Takayuki Osogami, Rudy Raymond
    Abstract:

    We derive upper bounds on the tail distribution of the transient waiting Time in the GI/GI/1 queue, given a truncated sequence of the moments of the service Time and that of the Interarrival Time. Our upper bound is given as the objective value of the optimal solution to a semidefinite program (SDP) and can be calculated numerically by solving the SDP. We also derive the upper bounds in closed form for the case when only the first two moments of the service Time and those of the Interarrival Time are given. The upper bounds in closed form are constructed by formulating the dual problem associated with the SDP. Specifically, we obtain the objective value of a feasible solution of the dual problem in closed from, which turns out to be the upper bound that we derive. In addition, we study bounds on the maximum waiting Time in the first busy period.

  • SIGMETRICS - Semidefinite optimization for transient analysis of queues
    Proceedings of the ACM SIGMETRICS international conference on Measurement and modeling of computer systems - SIGMETRICS '10, 2010
    Co-Authors: Takayuki Osogami, Rudy Raymond
    Abstract:

    We derive an upper bound on the tail distribution of the transient waiting Time for the GI/GI/1 queue from a formulation of semidefinite programming (SDP). Our upper bounds are expressed in closed forms using the first two moments of the service Time and the Interarrival Time. The upper bounds on the tail distributions are integrated to obtain the upper bounds on the corresponding expectations. We also extend the formulation of the SDP, using the higher moments of the service Time and the Interarrival Time, and calculate upper bounds and lower bounds numerically.

Pablo Goulart - One of the best experts on this subject based on the ideXlab platform.

  • LCN - Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.

  • Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.

Alex B. Vieira - One of the best experts on this subject based on the ideXlab platform.

  • LCN - Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.

  • Hardware Modules for Packet Interarrival Time Monitoring for Software Defined Measurements
    2016 IEEE 41st Conference on Local Computer Networks (LCN), 2016
    Co-Authors: Racyus Pacífico, Pablo Goulart, Alex B. Vieira, Marcos A.m. Vieira, José Augusto M. Nacif
    Abstract:

    Measurement and tracking have crucial roles in Software-Defined Networks (SDNs). Unfortunately, most of procedures and techniques to perform measurements and monitoring tasks are implemented in software at network end-hosts. Despite the large use, a software based approach generates imprecision, high costs, and makes monitoring more difficult. In this paper, we extend OpenFlow switch to implement a measurement architecture for SDN. Our system performs measurements in a simple and scalable way without depending on end-hosts. It allows monitoring the performance at the granularity of flows. Moreover, our system also enables software-defined measurements can collect flow's statistics on the fly. We have prototyped our architecture on the NetFPGA platform and, as an initial case study, we have implemented a module to measure packet Interarrival Time. This module has been validated in a realistic testbed. Our results demonstrate that the proposed architecture presents a negligible difference when compared to measurements performed by software at end-hosts.