Method and system for multilevel arbitration in a non-blocking crossbar switch
US6628662B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1999 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Nov 29, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/205
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for arbitrating data transfers between devices connected via electronically isolated buses at a switch. In accordance with the method and system of the present invention, multiple arbitration controllers are interposed between devices and a switch to which the devices are connected, wherein each of the multiple arbitration controllers are effective to select a data transfer operation and detect collisions between said selected data transfer operations. The switch is enabled for any selected data transfer operations between which collisions are not detected. The switch is also enabled for only one of the selected data transfer operations between which collisions are detected. Any selected data transfer operations for which the switch is not enabled are deferred. The deferred data transfer operations are prioritized within the multiple arbitration controllers, such that for a subsequent selection of the deferred data transfer operations, the switch is enabled for the deferred data transfer operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.