OPTICAL NETWORK TOPOLOGY DATABASES AND OPTICAL NETWORK OPERATIONS

摘要

A number of wavelength division multiplexing (WDM) access nodes employ a distributed search based scheme to build network topology databases based on a set of connectivity constraints (1230). A set of one or more connectivity constraints that include quality or service (QoS) based criteria are applied on a physical network topology of a WDM optical network to divide that optical network into separate service levels (910) whose topologies (920) are determined for each of the service levels. A number of WDM access nodes of an optical network employ a source based scheme to establish communication paths (1145). Each of these access nodes stores a set of one or more network topology databases based on a set of connectivity constraints. Each of these nodes employs a messaging scheme to propagate notification of changes in the optical network to other nodes to maintain their databases.