System and method for restricted reuse of intact portions of failed paths
US6496476B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1998 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Sep 11, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2203/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a path-based distributed restoration algorithm provisioned telecommunications network, the origin and destination nodes of a failed path are apprised of the portions of the path that remain intact by “reuse” messages that are sent from the custodial nodes that are adjacent to the failure. As each reuse message reaches an intermediate node, the node ID of the intermediate node is appended to a field of the message so that, as the reuse messages are propagated along the intact portions of the failed path, a cumulative list of nodes that are encountered by the messages passing from the custodial nodes to the origin and destination nodes is set forth. Thus, the origin/destination node, when in receipt of a reuse message, can read from the field that has the cumulative list of nodes a description of the intact portions remaining from the original path. These intact portions are preferably used only for restoring of the same path that included the portions prior to failure and are not available for restoring any other paths that happened to fail simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.