Method for checking the transfer of data cells in an asynchronous switching arrangement, elementary switching unit and network equipped for such a method
US6901054B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 2000 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Apr 28, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5651
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
For checking transfer of data cells in an asynchronous switching arrangement, cells are cyclically marked and counted before entering and after leaving the arrangement.A periodical time frame composed of N interleaved checking cycles is imposed. Each cycle (C1) includes two phases, a first phase (IC1) for marking and counting the cells, when received and before switching, and a second counting phase (OC1) for counting cells after switching. An identification mark is introduced in every cell received during the first phase of every cycle, it is linked to the position of this cycle in the time frame. Cells marked according to a cycle are counted as soon as switched during the second phase of the cycle, which starts with a determined delay (d1) during each first phase, for a determined duration (t2). A determination of the correspondence between the two counts obtained during a cycle is made and induces a fault signaling as soon as such a correspondence as otherwise determined is not obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.