Fault detection and isolation in a synchronous optical network (SONET) and in a synchronous digital hierarchy (SDH) network
US6452906B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1998 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Aug 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2203/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An in-band fault detection and isolation system and method for networks such as Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) networks. Fault detection may be quickly and efficiently performed by a network without requiring modification to any add/drop multiplexers (ADMs) and/or without the involvement of an external network management system (NMS). To accomplish this without violating SONET/SDH standards, a new signal, called a fault isolation signal in the path (FIS-P), is proposed. The FIS-P may be used in lieu of an AIS-P to support special applications on certain digital cross connect (DCS)-to-DCS path segments. Moreover, the present invention may be implemented such that the behavior, of path terminating equipment (PTE) is unaffected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.