Method and apparatus for providing packet ring protection
US8264952B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2008 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Jun 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
For a ring protection method in a packet transport network a failure is detected at a first network node (N4) in the ring (1, 2). The failure is communicated along the ring (1, 2) using an automatic protection switching protocol. At the first node (N4) or at a second node (N1) adjacent to the failure, a protection switch-over for at least one protected traffic stream (4) is activated by redirecting the traffic stream (4) into the reverse direction of the ring (1, 2). Selected network nodes (N2, N5) along the ring squelch the traffic stream (4) in accordance with pre-configured squelching tables. Squelching is performed only by networks nodes along the ring which perform either an add function or a drop & continue function for the traffic stream (4) to be squelched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.