Artigos de Conferência, Publicação

Provisionamento Automático de Conexões Determinísticas para Redes GOBS

This paper proposes an architecture for the automatic establishment of connections that match the performance constraints for grid applications. This architecture is based on optical burst switching and on the utilization of protocols with traffic engineering functionalities. It propose an element called GOBS (Grid Optical Burst Switching) Server that stores and collects information about grid metrics and network resources and helps in the calculation of deterministic routes. Simulations show that the proposal is able to minimize the burst blocking, thus guaranteeing the established service levels, and it allowing better utilization of the grid and network resources.

Artigos de Conferência, Publicação

A multiple-metric approach for routing in wireless mesh networks

We present a multiple-metric approach in order to improve routing in Wireless Mesh Networks (WMNs). It is based on the proactive Optimized Link State Routing (OLSR) protocol to deal with applications with high Quality of Service (QoS) demands. Since routing with multiple metrics is an NPcomplete problem, we use the Analytic Hierarchy Process (AHP) and Pruning techniques to perform such routing. The proposal, dubbed here OLSR-MM (Multiple-Metric), offers the best available routes based on the considered metrics and is evaluated on Network Simulator 2.31.

Artigos de Conferência, Publicação

Reactive Management of Quality of Service in Multimedia OBS Networks Based on GMPLS

This paper presents a proposal for dynamic control of Quality of Service (QoS) in optical networks based on optical burst switching (OBS) using a GMPLS control plane. In this proposal, monitoring agents are used to verify the QoS experienced by the burst classes and to deploy reactive mechanisms in order to guarantee absolute performance levels. Using GMPLS traffic engineering, these agents also offer idle resources to traffic flows whose service level is not being achieved. Simulation results show that the proposal can minimize the blocking probability when there are violations of burst flow parameters.

Artigos de Conferência, Publicação

Abare: A Deployment and Management Framework for Wireless Mesh Network

The adoption of wireless mesh networks as a solution for access networks in indoor and outdoor environments is considered by the academic community and industry as a good alternative for Internet access due to their economic and technical feasibility. However, the existence of proprietary and opensource solutions that are not interoperable and the delay in the standardization makes the deployment of wide scale wireless mesh networks a time consuming task and it may come along with some security problems. In this paper, we propose Abare, a framework which defines a set of components and steps to aid in the deployment and administration of mesh networks since its inception.