A model‐based abstraction layer for heterogeneous SDN applications

Abstract

Modern controllers for software-defined networks (SDN) enable the execution of arbitrary SDN applications (eg, Network Address Translation (NAT), traffic monitors) that may be exploited by an overarching set of services (eg, application-layer orchestrators) to build even richer services. To this purpose, the above overarching services require a mechanism that allows reading the run-time state and writing the configuration of arbitrary SDN applications, possibly through a uniform API. Unfortunately, most SDN applications are not designed/implemented by taking into account the possibility to be used as part of higher level service workflows (eg, a complex intrusion prevention system that leverages multiple elementary services as individual components), hence they may not provide an adequate interface that would allow overarching services to exploit their features. This paper addresses this problem by proposing an approach to represent the run-time state of arbitrary applications, where data are exported according to high-level model-based structures. Furthermore, the mapping from the high-level data model to the actual data representation within the SDN application is enabled by a suite of algorithms that are generic enough to operate independently of the actual source code of the application, thus avoiding undesired and invasive modifications to existing applications. The paper also presents a software framework and a prototype implementing the proposed approach, characterizes the resulting performance, and discusses pros and cons of the proposed approach. KEYWORDS data modeling, network services, network orchestration, SDN, YANG INTRODUCTIONModern controllers for software-defined networking (SDN), such as open network operating system (ONOS) 1 and open daylight, 2 offer high-level programming abstractions that allow to develop software programs (ie, SDN applications, or SDNApps in this paper) to perform arbitrary network-related tasks going beyond forwarding, routing ,or topology discovery operations, such as application-based traffic monitoring, firewall, NAT, and deep packet inspection. This paradigm enables the creation of programmable network environments able to address the emerging communication requirements (eg, QoS, security) of modern application services (eg, Smart City, Cloud Robotics) operating on top of a distributed and Int J Commun Syst. 2019;32:e3989.wileyonlinelibrary.com/journal/dac

Arquitectura de interoperabilidad para mejorar la gestión y coordinación de múltiples UXV y la toma de decisiones

“…Esta capa actúa como un mediador entre la aplicación y las bases de datos subyacentes, proporcionando una interfaz genérica para interactuar con diferentes sistemas de almacenamiento de datos. Esta sección detalla la estructura y funcionalidad de la capa de abstracción de base de datos y cómo se adapta para conectar con diversas bases de datos según los requerimientos específicos de los proyectos [89].…”