| 摘要 |
An algorithm for dynamic provisioning of fail-over support Generalized Multi-Protocol label Switching ("GMPLS") enabled networks is disclosed. A Fault-Tolerant Routing and Wavelength Assignment ("FT-RWA") scheme uses a pseudo-dynamic mechanism to provide such fail-over support for the GMPLS networks. The FT-RWA scheme is capable of recovering from channel and link failures within the GMPLS network. When a channel failure occurs, some wavelength channels on the link fail. As a result, traffic on the affected light paths are switched to any unused and reserved wavelengths on the same link. If no wavelengths are available, the failure is perceived as a link failure. When a link failure occurs, all of the traffic is redirected to a neighboring node, designated as a "redirector". The redirector node calculates alternate routes to the destination of that link and creates a light path on a suitable route when a failure occurs. |
