Wavelength defragmentation apparatus, wavelength defragmentation method and program
AssigneeNTT, Inc.
InventorsHanami Yokoi, Kojun Koshiji, Yasuharu Kaneko, Tatsuya Matsukawa, Mika Ishizuka, Takafumi Hamano
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Abstract
A wavelength defragmentation apparatus for executing wavelength reallocation for a path in an optical transmission network, the wavelength defragmentation apparatus comprising: a storage unit that stores a path information database (DB) and a wavelength allocation management DB; and a wavelength defragmentation functional unit that refers to an attribute of a path from the path information DB and performs wavelength reallocation of a path having the attribute by an operation corresponding to the attribute.
Claims9
A wavelength defragmentation apparatus for executing wavelength reallocation for a path in an optical transmission network, the wavelength defragmentation apparatus comprising:
- a memory configured to store a path information database (DB) and a wavelength allocation management DB;
- and
- a processor coupled to the memory and configured to refer to an attribute of a path from the path information DB and perform wavelength reallocation of a path having the attribute by an operation corresponding to the attribute,
- wherein the processor is configured to determine, for a high-reliability path, whether all wavelengths from a currently used wavelength to a candidate reallocation destination wavelength are continuously available based on the wavelength allocation management DB, and reallocates the path using Push-Pull technology while maintaining data transmission on the path.
A wavelength defragmentation method executed by a wavelength defragmentation apparatus that includes a memory storing path information database (DB) and a wavelength allocation management DB and executes wavelength reallocation for a path in an optical transmission network, the wavelength defragmentation method comprising:
- referring to an attribute of a path from the path information DB to execute wavelength reallocation of a path having the attribute by an operation corresponding to the attribute,
- wherein the wavelength defragmentation method further comprises,
- determining, for a high-reliability path, whether all wavelengths from a currently used wavelength to a candidate reallocation destination wavelength are continuously available based on the wavelength allocation management DB, and
- reallocating the path using Push-Pull technology while maintaining data transmission on the path.
Dependencies are inferred from the claim text.