System and method for implementing GFR service in an access node's ATM switch fabric
US7336662B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2002 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Sep 27, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5679
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A scheme for implementing GFR service in an ATM environment, e.g., an access node's ATM switch fabric. Regulation of a GFR flow is throttled between two modes, a guaranteed rate mode and a non-guaranteed rate mode, depending upon timestamps computed by applicable traffic policer/shaper algorithms. A scheduler is operably coupled to a policing block for scheduling cells from a guaranteed flow queue for transport via the ATM fabric at a guaranteed rate upon determining the onset of a guaranteed service frame. The scheduler switches to non-guaranteed rate mode for scheduling cells from the flow queue at a non-guaranteed rate when a timestamp (TSNGF) for transmission at the non-guaranteed rate is earlier than a timestamp (TSGF) for transmission of a next guaranteed service frame at the guaranteed rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.