Switching apparatus and method for multiple traffic classes
US5742606A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5682
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a communication switch with input and output queueing, which handles different priority classes of traffic (e.g. video and audio applications with a high priority, and file transfers and e-mail as low priority traffic), the invention provides a timed shut-off mechanism at each input queue. This mechanism is activated when an input queue attempting to transmit low-priority traffic gets a backpressure signal. The mechanism interrupts further attempts to transmit low priority traffic for a predetermined period of T switching cell cycles. Hence, during the shut-off periods, the output queue is only used by the high priority traffic. Therefore, the performance of the high priority traffic is preserved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.