Logical Topology Reconfiguration in Full-Mesh WDM Networks (AWG-STAR) Based on Wavelength Routing Technology

Logical Topology Reconfiguration in Full-Mesh WDM Networks (AWG-STAR) Based on Wavelength Routing Technology This paper presents a novel architecture for a logical topology reconfiguration in a wavelength-division multiplexing (WDM) arrayed-waveguide grating (AWG)-STAR network with a star-shaped physical topology and full-mesh path connections for up to routes. The network system consists of a data plane in the 1.5- m wavelength region and an in-fiber control plane in the 1.3-mm wavelength region. On the data plane, each node containing tunable lasers and filters is connected to a router. On the control one, a topology-management system with centralized management architecture was constructed. The topology-management system calculates and assigns suitable wavelength paths for each node to be (re)configured for building a new logical topology. This novel feature of the optical-network system enables multitopology (ring, star, mesh, point-to-point, and mixed multiple topologies) (re)configuration, and also node switching from any, to any, topology. The typical topology (re)configuration time of 150 ms was also demonstrated in a constructed testbed system.