Browsing by Author "Mex Perera, Jorge Carlos"

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    PublicationOpen Access
    A performance evaluation of contention resolution and resource allocation in optical packet switched network scenarios
    (2010) Mozo Olea, Javier; Porta Cuéllar, Sonia; Mex Perera, Jorge Carlos; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Instituto Tecnológico y de Estudios Superiores de Monterrey (México); Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    Contention resolution represents a challenge considered when implementing resource allocation over optical packet switching. Analytical models are proposed to optimize the behavior of different architectures and networks in terms of contention resolution and resource allocation. Asymmetries in the network traffic distribution due to the network topology induce different dimensioning results, thus different topologies are studied to quantify the required number of links and fiber delay lines. Afterwards, two contention resolution strategies are introduced to quantify the impact on the number of converters and fiber delay lines over an optical packet switching architecture. Finally, a matrix model is defined to analyze blocking situations over an optical packet switching architecture, this model seems to be very powerful to improve the efficiency of the system regarding blocking situations. Simulation results show that the proposed strategies can be utilized to improve the performance of the utilized optical packet switching architectures in terms of resource allocation.
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    PublicationOpen Access
    A permormance comparison of contention resolution and resource allocation in slotted optical burst switched vs. optical packet switched network scenarios
    (2011) Chávarri Burguete, Inés; Porta Cuéllar, Sonia; Mex Perera, Jorge Carlos; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Instituto Tecnológico y de Estudios Superiores de Monterrey (México); Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    SOBS might be a good alternative to the already proposed OPS and OBS models. It has not been plenty studied yet and it might benefit from lower requirements for the TWCs and solve packet header overhead inefficiency, yet maintaining the advantages derived from synchronicity, thus postulating as a valid solution. Objectives: • Implement a SOBS switch simulator based on an OPS switch; • Compare the performance of OPS and SOBS switches in terms of packet loss probabilities under similar conditions of traffic for three different traffic models: Poisson, Exponential and Pareto; • Compare the performance of the European optical network based on each type of switch under different traffic models according to the costs associated to the utilization of resources.