Optical add/drop multiplexing system, optical add/drop multiplexer and optical pathway detour program

摘要

If opening and deleting of arbitrary optical pathways are repeated in a configuration where plural OADM nodes (100) are connected to each other in a ring manner, empty waves in the ring are fragmented, and thus, it is necessary to optimize the optical pathways (200). When an optical pathway (200) is opened from an OADM node (100) to a different OADM node (100), transponders (102) capable of connecting two routes to the OADM nodes (100) and of setting different wavelengths for two routes are mounted in a state where there are no empty waves on a part of the route, so that an already-opened optical pathway (200) is detoured to a detour route or a different wavelength in the OADM ring, and continuous empty waves are produced in a section to be opened so as to open a new optical pathway (200).