Clasificación de parámetros y criterios al ensamblar la ráfaga

This article presents a classification of some of the algorithms or mechanisms for assembling burst of data existing in the scientific literature of the networks switching optical of burst, based on the different parameters and criteria that affect of assembly process. Marking out, that this classification is the result of the revision stage of the "state of the art" in the degree work entitled "Adaptive Algorithm based on fuzzy logic and PSO for the assembly of bursts in a distributed network of OBS", at level master's degree. The way in which the burst is assembled is of great importance, since it is the process manage´s the loading of incoming traffic to a network and in this way manages the performance of the entire network. In some cases, the performance is analyzed in terms of the probability of blockage and in the end-to-end delay of the transmitted bursts, among other parameters. The results will help new researchers, interested in the optical networks and more in the process of assembly, have a synthesis of the basic concepts of optical switching networks, know and differentiate the parameters and criteria that affect when assembling a burst of data, pointing out some of the combinations that have been applied in other works. Also, be able to identify some of the potential problems open on this topic.Este artículo presenta una clasificación de algunos de los algoritmos o mecanismos para ensamblar la ráfaga de datos existentes en la literatura científica de las redes de conmutación óptica de ráfagas, basándose en los diferentes parámetros y criterios que inciden en el proceso de ensamblaje. Resaltando, que dicha clasificación es el resultado de la etapa de revisión del estado del arte en el trabajo de grado titulado “Algoritmo Adaptativo basado en la Lógica Difusa y PSO para el Ensamble de Ráfagas en una red OBS Distribuida”, a nivel de maestría. La forma en que se ensambla la ráfaga es de gran importancia ya que es el proceso que gestiona la carga de tráfico entrante a una red y de esta manera gestiona el desempeño de toda la red. En algunos casos, el desempeño es analizado en cuanto a la probabilidad de bloqueo y en el retardo de extremo a extremo de las ráfagas transmitidas, entre otros parámetros. Los resultados ayudaran a los nuevos investigadores, interesados en las redes ópticas y más en el proceso de ensamblaje, tener una introducción general de las redes de conmutación óptica, conocer y diferenciar los parámetros y criterios que inciden a la hora de ensamblar una ráfaga de datos, señalando algunas de las combinaciones que se han aplicado en otros trabajos. Además, poder identificar algunos de los problemas potenciales abiertos en este tema

Hybrid offset-time and burst assembly algorithm (H-OTBA) for delay sensitive applications over optical burst switching networks

Summary Optical burst switching (OBS) is the most favourable switching paradigm for future all-optical networks. Burst assembly is the first process in OBS and it consists of aggregating clients packets into bursts. Assembled bursts wait for an offset time before being transmitted to their intended destinations. Offset time is used to allow burst control packet reserve required resources prior to burst arrival. Burst assembly process and offset-time create extra delay in OBS networks. To make OBS suitable for real time applications, this extra latency needs to be controlled. This paper proposes and evaluates a novel offset time and burst assembly scheme to address this issue. Constant bit rate (CBR) traffic that has stringent end-to-end delay QoS requirements is used in this study. The proposed scheme is called hybrid offset-time and burst assembly algorithm (H-OTBA). The objective of the paper is achieved by controlling maximum burst transfer delay parameters of CBR. The proposed scheme was evaluated via network simulation. Simulation results demonstrate that, H-OTBA has effectively reduced end-to-end delay for CBR traffic compared with current solutions