Path-based restoration mesh networks
US6324162A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1998 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Jun 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Restoration of service in a mesh network (10) upon the failure of a working channel (16) on a link (14.sub.I) connecting a pair of nodes (12A and 12D) is accomplished by first attempting to route traffic on an restoration channel (18) in the same link when such a channel is available. If such "localized" restoration can not be accomplished, then the end-point (traffic originating and/or terminating) nodes that are connected by a path that includes the link having the failed working channel then implements a precomputed path. Each pre-computed path identifies a collection of channels in a series of links that connect the end-point nodes (and any intermediate nodes) so as to bypass traffic around the link having the failed working channel. The pre-computed path information is typically pre-stored in the end-point nodes to enable the end-point nodes to effect rapid restoration in the event localized restoration in not achievable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.