ATM cell format conversion system
US5341376A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1991 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Jul 26, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5674
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An ATM (Asynchronous Transfer Mode) cell format conversion system writes in a memory a plurality of ATM cells each being 53 octets long and mapped in the payload fields of virtual containers VC-4-NC which have been multiplexed in the form of STM-N frames and have been extracted from said frames. A 1 octet-long cell overhead is added to each of the ATM cells read out of the memory in response to base frame pulses which are synchronous with the STM-N frames, whereby the ATM cells are converted to 1-octet-added ATM cells each being 54 octets long. The 1-octet-added ATM cells and an idle cell are mapped in an imaginary matrix 5 column groups.times.9 rows frame by frame and then outputted. This allows each of the STM-N frames or be switched to otherwise processed on an ATM cell basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.