Spectral slot assignment and placement of wavelength shifters in flexible grid optical networks
US10348439B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | May 14, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0086
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A control system for spectral slot assignment in flexible grid optical networks determines, for a given optical path, a physical source node, a physical destination node, and physical intermediate nodes, determines the number of contiguous spectral slots to allocate for traffic on the path, identifies candidate combinations of spectral slots available for the traffic, and creates an auxiliary graph for the path. The auxiliary graph includes auxiliary links representing candidate combinations of spectral slots, virtual nodes representing pairs of neighboring physical nodes, and auxiliary links between each pair of virtual source-side and destination-side intermediate nodes representing either pass-through traffic or wavelength shifted traffic. The control system assigns cost values to the auxiliary links, determines a lowest cost combination of auxiliary links from the source to the destination, allocates the corresponding candidate combinations of spectral slots to the traffic, and configures the physical intermediate nodes accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.