Marcos Siqueira
State University of Campinas
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Marcos Siqueira.
global communications conference | 2013
Marcos Siqueira; Juliano R. F. Oliveira; Giovanni Curiel; Alberto Hirata; Fabian van't Hooft; Marcelo Ribeiro Nascimento; Júlio Oliveira; Christian Esteve Rothenberg
This paper proposes an architecture for Software Defined Optical Transport Networks. The SDN Controller includes a network abstraction layer allowing the implementation of cognitive controls and policies for autonomic operation, based on global network view. Additionally, the controller implements a virtualized GMPLS control plane, offloading and simplifying the network elements, while unlocking the implementation of new services such as optical VPNs, optical network slicing, and keeping standard OIF interfaces, such as UNI and NNI. The concepts have been implemented and validated in a real testbed network formed by five DWDM nodes equipped with flexgrid WSS ROADMs.
optical fiber communication conference | 2014
Júlio C. R. F. Oliveira; Juliano R. F. Oliveira; Marcos Siqueira; Rafael Augusto Scaraficci; Marcos Rogério Salvador; Leonardo Mariote; Neil Guerrero; Luis Carvalho; Fabian van't Hooft; Giovanni Santos; Eduardo Magalhães; João C. S. S. Januário
This paper presents an Optical SDN architecture and implementation enabled for virtual optical networks, supporting adaptive and cognitive algorithms to enhance QoT. The paper also shows experimental results of a software-defined autonomic flexible transponder.
optical fiber communication conference | 2014
Eduardo Magalhães; Juliano R. F. Oliveira; Heitor Carvalho; Matheus Magalhães; Miquel Garrich; Marcos Siqueira; Aldário C. Bordonalli; Júlio C. R. F. Oliveira
We introduce a global (end-to-end) ROADM-based spectrum equalizer algorithm running over DWDM networks on SDN architecture. Significant OSNR improvements are experimentally demonstrated for a DWDM coherent 80×112Gb/s system compared with local equalization schemes.
sbmo/mtt-s international microwave and optoelectronics conference | 2013
Juliano R. F. de Oliveira; Marcos Siqueira; Giovanni Curiel; Alberto Hirata; Fabian van't Hooft; Diego Macedo; Marcio Colazza; Christian Esteve Rothenberg
This paper demonstrates a testbed of a reconfigurable optical network composed by four ROADMs equipped with flexgrid WSS modules, optical amplifiers, optical channel monitors, and supervisor boards. A controller daemon implements a node abstraction layer based in the YANG language, providing NETCONF and CLI interfaces. Additionally we demonstrate the virtualization of GMPLS control plane, while supporting automatic topology discovery and TE-Link instantiation, enabling a path towards SDN. GMPLS have been extended to collect specific DWDM measurement data allowing the implementation of adaptive/cognitive controls and policies for autonomic operation, based on global network view.
optical fiber communication conference | 2014
Miquel Garrich; Juliano R. F. Oliveira; Marcos Siqueira; Norberto Amaya; Georgios Zervas; Dimitra Simeonidou; Julio C. R. F. Oliveira
We introduce add/drop on demand (ADoD) architecture for ROADMs to provide higher flexibility and lower loss than current proposals. We quantitatively measure flexibility considering systems entropy and associate it with traffic uncertainty, upgradability, and resilience.
Journal of Network and Systems Management | 2015
Marcos Siqueira; Fabian van't Hooft; Juliano R. F. Oliveira; Edmundo Roberto Mauro Madeira; Christian Esteve Rothenberg
This paper presents a novel policy-based mechanism to provide context-aware network-wide policies to Software Defined Networking (SDN) applications, implemented with a policy flow based on property graph models. The proposal has been validated in a transport SDN controller, supporting optical network virtualization via slicing of physical resources such as nodes, links and wavelengths, through use case testbed demonstrations of policy enforcement for SDN applications, including optical equalization and virtual optical network control. Additionally, the policy engine incorporates a simulation-assisted pre-setting mechanism for local policy decisions in case of problems in communication with the controller.
international ifip-tc networking conference | 2006
Marcos Siqueira; Fábio Luciano Verdi; Rafael Pasquini; Maurício F. Magalhães
This paper proposes an architecture for Ambient Networks (AN) management, which is based on components such as Autonomic Networking and Policy Based Network Management. The main goal is to allow AN management aligned to the network requirements, incorporating functionalities such as self-configuration, self-management, self-healing and self-protection. In the proposed architecture, all these functionalities are controlled by a distributed policy-based system, allowing network configuration based on business policies.
international conference on networking | 2005
Marcos Siqueira; Fabricio Lira Figueiredo; Flavia M. F. Rocha; Jose A. Martins; Marcel Cavalcanti de Castro
Ad hoc networks are intrinsically dynamic with respect to mobility, traffic patterns, node density, number of nodes, physical topology, and others. This scenario imposes several challenges to the ad hoc routing protocols, and there is no single solution for all scenarios. This paper proposes the application of Policy-Based Network Management (PBNM) for dynamic reconfiguration of ad hoc networks. PBNM uses the concept of policies formed by events, conditions and actions. The occurrence of an event triggers conditions evaluation, and if evaluated to true, a set of actions should be performed. The paper contribution comprises the proposal of an ad hoc policy information model based on DEN-ng policy model for the implementation of a policy manager prototype to be integrated in the NS-2 simulator allowing dynamic reconfiguration of routing protocol parameters in simulation time; and the proposal of policies for dynamically adjusting the ad hoc routing protocol behavior.
advanced information networking and applications | 2014
Marta C. C. Lacerda; Marcos Siqueira; Paulo R. S. L. Coelho; Luis F. Faina; Lásaro J. Camargos; Christian Esteve Rothenberg; Rafael Pasquini
This paper presents a proposal for shrinking the number of IPv4 FIB (Forwarding Information Base) entries required on routers. Traffic forwarding under the proposed mechanism is based on the current ASNs (Autonomous System Numbers), and can be gradually adopted by ISPs.We find that, at the cost of adding 8 bytes per packet, the proposed ASN-FWD technique is capable of providing full IPv4 traffic forwarding based on ASN information, which is correspondent to 10% of the current number of IPv4 prefixes present on FIB of routers. Among its main benefits, the proposed approach alleviates the pressure on the amount of FIB shipped on routers, and paves the way for a worldwide adoption of IPv6.
IEEE\/OSA Journal of Optical Communications and Networking | 2015
Júlio C. R. F. Oliveira; Juliano R. F. Oliveira; Eduardo Magalhães; João C. S. S. Januário; Marcos Siqueira; Rafael Augusto Scaraficci; Marcos Rogério Salvador; Leonardo Mariote; Neil Guerrero; Luis Carvalho; Fabian van't Hooft; Giovanni Santos; Miquel Garrich