Optical data transmission method and apparatus
US9654248B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Oct 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/026
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A routing and wavelength assignment method for use in an optical fiber network includes (i) identifying a path between each node pair in the network, (ii) identifying a block of spectral resource within the spectrum band of the identified path of a selected node pair, (iii) calculating a spectrum entropy value of the identified path of the selected node pair based on a logarithm of the ratio of the number of wavelength channels in each of the one or more blocks, to the total number of wavelength channels across the spectrum band, (iv) iterating (ii) and (iii) in respect of each of the paths between each other node pair in the network, until a spectrum entropy value of all the paths between all the node pairs has been calculated, (v) summing the spectrum entropy value of all of the paths between all of the node pairs to obtain a network spectrum entropy value in respect of a network configuration based on the paths between the node pairs, and (vi) determining from the network spectrum entropy value whether a signal carrying a demand through the network is separated from any other signals by a spectral gap sufficient to accommodate a change in the demand to an expected level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.