Method and apparatus for path computation element and routing controller cooperation
US8644325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2010 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jan 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0073
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system, method, and node for a Routing Controller (RC) to obtain from a Path Computation Element (PCE), network resource path metrics across a plurality of domains in a communication network in which each domain includes a plurality of Border Nodes (BNs). The RC sends to the PCE, a first message requesting a first path computation between each pair of BNs. The first message contains a maximum metric-value that a path computation must not exceed for a Path Computation Client (PCC) to consider the path computation acceptable. The RC then sends a second message requesting the PCE to compute a subsequent path computation for each BN pair for which the first path computation did not exceed the maximum metric-value. The second message contains a minimum metric-value that a path metric must exceed for the PCC to consider the path metric acceptable. The RC then receives the computed subsequent path computation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.