Communication path quality monitoring method and quality monitoring apparatus
US6477141B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Mar 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/0829
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A start/stop setting section is provided on the upstream side of a dual-configuration ATM switch, and a start/stop detection section is provided on the downstream side for each of a working and a protection line. At the initiation of quality monitoring, the start/stop setting section sets a start bit in an incoming cell having a specified identifier, and thereupon starts counting the number of cells whose identifier matches the specified identifier. The start/stop detection section, upon detecting the cell having the start bit, starts counting the number of cells whose identifier matches the identifier of the detected cell. At the end of the quality monitoring, the start/stop setting section sets a stop bit in an incoming cell having the specified identifier, and thereupon stops the counting of cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.