6 research outputs found

    An SMDP-based Resource Management Scheme for Distributed Cloud Systems

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    In this paper, the resource management problem in geographically distributed cloud systems is considered. The Follow Me Cloud concept which enables service migration across federated data centers (DCs) is adopted. Therefore, there are two types of service requests to the DC, i.e., new requests (NRs) initiated in the local service area and migration requests (MRs) generated when mobile users move across service areas. A novel resource management scheme is proposed to help the resource manager decide whether to accept the service requests (NRs or MRs) or not and determine how much resources should be allocated to each service (if accepted). The optimization objective is to maximize the average system reward and keep the rejection probability of service requests under a certain threshold. Numerical results indicate that the proposed scheme can significantly improve the overall system utility as well as the user experience compared with other resource management schemes.Comment: 5 pages, 5 figures, conferenc

    Re-designing Dynamic Content Delivery in the Light of a Virtualized Infrastructure

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    We explore the opportunities and design options enabled by novel SDN and NFV technologies, by re-designing a dynamic Content Delivery Network (CDN) service. Our system, named MOSTO, provides performance levels comparable to that of a regular CDN, but does not require the deployment of a large distributed infrastructure. In the process of designing the system, we identify relevant functions that could be integrated in the future Internet infrastructure. Such functions greatly simplify the design and effectiveness of services such as MOSTO. We demonstrate our system using a mixture of simulation, emulation, testbed experiments and by realizing a proof-of-concept deployment in a planet-wide commercial cloud system.Comment: Extended version of the paper accepted for publication in JSAC special issue on Emerging Technologies in Software-Driven Communication - November 201

    La seguridad en redes SDN y sus aplicaciones

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    Introduction: The review article is the product of the research on Security in SDN networks and their applications, developed at the District University in 2020, presenting the latest advances, that have been made in security. Problem: The security weaknesses that SDN networks have had, due to being a new architecture. This has not allowed traditional networks to be replaced.   Objective: To carry out a review of the state of the art of SDN networks, focusing research on the security of the control layer and its advances. Methodology: The descriptive method is implemented, consulting databases such as Scopus, IEEE and ScienceDirect, using the following search criteria: SDN networks, security in SDN networks, applications with SDN networks and OpenFlow protocol. It is shown as a research sample: the Asian, European and American continents with years of research from 2014 to 2020. Results: Great advances have been made in terms of security for SDN networks, which allows us to see an early solution to the weaknesses that it currently faces.   Conclusion: SDN networks will solve all the challenges they face and will be consolidated as a solid and reliable architecture.   Originality: an important focus is taken on the security of SDN networks and the great development that has occurred in this regard is evident.   Limitations: SDN networks are a new architecture, so their development has been very little and advances in security have been significantly affected.Introducci贸n: El art铆culo de revisi贸n es producto de la investigaci贸n Seguridad en redes SDN y sus aplicaciones, desarrollada en la Universidad Distrital en el a帽o 2020, presentando los 煤ltimos avances que se han logrado en seguridad. Problema: Las debilidades en seguridad que han tenido las redes SDN debido a ser una arquitectura nueva, esto no ha permitido que se reemplacen las redes tradicionales. Objetivo: realizar una revisi贸n del estado del arte de las redes SDN enfocando la investigaci贸n la seguridad de la capa de control y sus avances. Metodolog铆a: se emplea el m茅todo descriptivo, se consultaron bases de datos como Scopus, IEEE y ScienceDirect, utilizando los siguientes criterios de b煤squeda: SDN networks, security in SDN networks, applications with SDN networks y OpenFlow protocol, se tom贸 como muestra de investigaci贸n a los continentes asi谩tico, europeo y americano con a帽os de investigaci贸n desde el a帽o 2014 hasta el a帽o 2020. Resultados: se han desarrollado grandes avances en seguridad para las redes SDN, lo que permite ver una pronta soluci贸n a las debilidades que afronta en la actualidad. Conclusi贸n: las redes SDN lograran resolver todos los retos a los que se enfrentan y se consolidara como una arquitectura s贸lida y confiable. Originalidad: se realiza un enfoque importante en la seguridad de las redes SDN y se evidencia el gran desarrollo que se ha presentado en este aspecto. Limitaciones: las redes SDN son una arquitectura nueva por lo que su desarrollo ha sido muy poco y los avances en seguridad se vieron afectados significativamente

    Estado del arte en redes definidas por software (SDN)

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    The growth of networks at a global level is inevitable due to the increase of users, devices and applications, such as: Internet of Things (IoT), processing and analysis of large amounts of information (Big Data), or streaming audio and video, which has demanded from the systems, greater storage resources and bandwidth. To this purpose, diverse paradigms have emerged for the centralized management of all the components of a network through fully administrable, centralized and dynamic technological platforms; among these is SDN (Software-Defined Networks). This document, consequently, establishes the state-of-art from a documentary research of a categorical type to be used as a frame of reference for research in the area of SDN by the Research Group of New Technologies of Social Application GIDENUTAS ascribed to the University Francisco Jose de Caldas. This is chronologically limited to a review, from 2007 until today, focused on the countries that have promoted the development and implementation of this new paradigm, using databases such as IEEE Xplore, Google Scholar, as well as documents from standardization organizations such as ONF and ITU.El crecimiento de las redes a nivel global es inevitable debido al aumento de usuarios, dispositivos y aplicaciones derivados de conceptos como pueden ser el Internet de las cosas (IoT, de ingl茅s Internet-of-Things), el procesamiento y an谩lisis de grandes cantidades de informaci贸n (Big Data), o la transmisi贸n de audio y video en vivo (Streaming), lo cual ha demandado de los sistemas mayores recursos de almacenamiento, ancho de banda y alta flexibilidad, entre otras caracter铆sticas. Por lo anterior, han emergido paradigmas para la gesti贸n centralizada de todos los componentes de una red mediante plataformas tecnol贸gicas totalmente administrables, centralizadas y din谩micas; entre estas se encuentran SD-WAN (Software Defined-Wide 脕rea Network) o SDR (Software-Defined Radio), ambas surgidas gracias al concepto de las Redes Definidas por Software o SDN (del ingl茅s Software-Defined Networking). El presente documento, en consecuencia, establece un estado de arte a partir de una investigaci贸n documental de tipo categorial para utilizarse como un marco de referencia de investigaciones en el 谩rea de SDN por el grupo de Investigaci贸n de Nuevas Tecnolog铆as de Aplicaci贸n Social GIDENUTAS adscrito a la Universidad Distrital Francisco Jos茅 de Caldas. Esta se limita cronol贸gicamente a una revisi贸n, desde el a帽o 2007 hasta hoy, enfocada en los pa铆ses que han promovido el desarrollo e implementaci贸n de este nuevo paradigma, recurriendo a bases de datos como IEEE Xplore, Google Scholar, as铆 como documentos de organizaciones de estandarizaci贸n como la ONF y la ITU

    State of the art In sotware defined networking (SDN)

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    El crecimiento de las redes a nivel global es inevitable debido al aumento de usuarios, dispositivos y aplicaciones derivados de conceptos como pueden ser el internet de las cosas (IoT, de ingl茅s Internet-of-Things), el procesamiento y an谩lisis de grandes cantidades de informaci贸n (Big Data), o la transmisi贸n de audio y video en vivo (Streaming), lo cual ha demandado de los sistemas mayores recursos de almacenamiento, ancho de banda y alta flexibilidad, entre otras caracter铆sticas. Por lo anterior, han emergido paradigmas para la gesti贸n centralizada de todos los componentes de una red mediante plataformas tecnol贸gicas totalmente administrables, centralizadas y din谩micas; entre estas se encuentran SD-WAN (Software Defined-Wide 脕rea Network) o SDR (Software-Defined Radio), ambas surgidas gracias al concepto de las Redes Definidas por Software o SDN (del ingl茅s Software-Defined Networking). El presente documento, en consecuencia, establece un estado de arte a partir de una investigaci贸n documental de tipo categorial para utilizarse como un marco de referencia de investigaciones en el 谩rea de SDN por el grupo de Investigaci贸n de Nuevas Tecnolog铆as de Aplicaci贸n Social GIDENUTAS adscrito a la Universidad Distrital Francisco Jos茅 de Caldas. Esta se limita cronol贸gicamente a una revisi贸n, desde el a帽o 2007 hasta hoy, enfocada en los pa铆ses que han promovido el desarrollo e implementaci贸n de este nuevo paradigma, recurriendo a bases de datos como IEEE Xplore, Google Scholar, as铆 como documentos de organizaciones de estandarizaci贸n como la ONF y la ITU.The growth of networks at a global level is inevitable due to the increase of users, devices and applications, such as: Internet of Things (IoT), processing and analysis of large amounts of information (Big Data), or streaming audio and video, which has demanded from the systems, greater storage resources and bandwidth. To this purpose, diverse paradigms have emerged for the centralized management of all the components of a network through fully administrable, centralized and dynamic technological platforms; among these is SDN (Software-Defined Networks). This document, consequently, establishes the state-of-art from a documentary research of a categorical type to be used as a frame of reference for research in the area of SDN by the Research Group of New Technologies of Social Application GIDENUTAS ascribed to the University Francisco Jose de Caldas. This is chronologically limited to a review, from 2007 until today, focused on the countries that have promoted the development and implementation of this new paradigm, using databases such as IEEE Xplore, Google Scholar, as well as documents from standardization organizations such as ONF and ITU

    Analysis of the Handover Procedure in Follow-Me Cloud

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    Follow-Me Cloud (FMC) allows transparent migration of end-points (users and services) in TCP/IP networks. In this paper we describe in details the FMC handover procedures and analyze the parameters that may affect their performance. Our analysis suggests possible optimizations for such procedures
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