Optical transmission system, node apparatus, and reachability determination method
US9634762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2016 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Mar 15, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0043
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A node apparatus is installed at a node located on a route from a start node to an end node, and includes: a parameter calculating unit configured to, upon receiving routing information specifying the route and a first parameter representing an amount of signal degradation, update the first parameter by using a second parameter representing an amount of signal degradation along a transmission route to an adjacent node, and generate a third parameter representing an amount of signal degradation along a transmission route between the start node and the node, specified by the routing information; and a determination unit configured to determine reachability of the route specified by the routing information in accordance with the third parameter and a fourth parameter representing an amount of signal degradation along a transmission route from the node to the end node specified by the routing information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.