Signal relay apparatus, node apparatus, network system, virtual-link generating method, path calculating method, and computer product

摘要

A ROADM device generates link information including a virtual link in which a first link that is used by a node apparatus for transmitting a signal and a second link of a ROADM device that is capable of branching a signal transmitted via the first link when the signal is transmitted via a WDM network are virtually connected each other, and transmits the generated link information.