Method for fault detection and fast protection switching in transmission systems
US6587974B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1999 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Nov 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/22
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method of detecting and correcting a fault in a signal transmission system. The method for detecting and correcting signal transmission faults in a signal transmission system includes bi-directional signaling on the same fiber, cable or signal line. A fault in a transmitted signal from a first upstream node to a second downstream node is determined by the loss or degradation of a signal simultaneously transmitted from the second downstream node to the first upstream node transmitted in the opposite on the same cable, signal line, or optical fiber. As a result, the aggregate propagation delay of the transmitted signals necessary for fault detection and fault notification is reduced and the amount of time to detect a fault and restore fault free signal transmission between one node and another node in a signal transmission systems is reduced, thereby increasing user satisfaction with minimal signal transmission interruptions even in the case of a transmission line fault. Further, a transmission line fault may be detected prior to transmission of a desired signal so that an alternate traffic route may be predetermined before transmission of the desired…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.