Queue size arbitration method and apparatus to enhance performance of crossbar cell switch
US6717945B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2000 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Aug 6, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5683
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and apparatus for arbitration among the inputs of a crossbar cell switch. The input cells of the crossbar cell switch are stored at their respective input ports in input queues prior to switching. The first cell of each input queue is known as the Head of Line (HoL) cell. For each set of HoL cells that may be directed to a specific output port, the HoL cell with the largest input port queue size is assigned to be switched during the current switching epoch. The method and apparatus for arbitration allows the crossbar cell switch to operate with smaller input queues, increasing the throughput of the switch and minimizing both the transit delay for the data cells through the switch and the buffer size needed to accommodate input queues.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.