Bandwidth control apparatus
US6687225B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1999 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Oct 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/568
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a bandwidth control apparatus in ATM equipment, for inserting management cells such as OAM cells, the control apparatus being configured to secure a bandwidth for the insertion of a management cell such as an OAM cell when the need arises, while guaranteeing the service quality of user cells, thereby making effective use of network resources for a best effort service such as ABR or UBR. The bandwidth control apparatus comprises a cell insertion block 1-10 for inserting a management cell such as an OAM cell and a shaping block 1-20 for performing user cell shaping, wherein the cell insertion block 1-10 issues an empty cell request when a cell insertion request occurs, the shaping block 1-20, upon receiving the empty cell insertion request, inserts an empty cell in a user cell stream being output from a shaping buffer 1-22, and the cell insertion block 1-10 writes a management cell such as an OAM cell over the empty cell inserted on a cell highway 1-30, thus sending the management cell out on the cell highway 1-30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.