Monitoring OAM cell assisted method of detecting bit errors occurring in ATM useful cells on an ATM transmission link
US6163872A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5647
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A monitoring OAM (operation administrating monitoring) cell assisted method to detect bit errors occurring in ATM useful cells on an ATM transmission link generates first control bits by evaluating bits of ATM useful cells with a selected target address in the cell head prior to feeding the ATM useful cells into the ATM transmission link, whereupon the first control bits are Abramson-encoded to generate further, second control bits. The first control bits are additionally encoded to produce additional, third control bits, all of which are entered into the monitoring OAM cells and transmitted on the ATM transmission link with the ATM useful cells. At a receiver decoder the ATM useful cells are separated from the monitoring OAM cells, the monitoring OAM cells are error detected and corrected where necessary using the second and/or third control bits to provide error-free OAM cells, the first control bits of which are used to detect bit errors in the ATM useful cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.