Scalable crossbar matrix switching apparatus and distributed scheduling method thereof
US7492782B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2004 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Nov 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/3045
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A high speed and high capacity switching apparatus is disclosed. The apparatus includes: N input ports each of which for outputting maximum l cells in a time slot, wherein each of the N input ports includes N virtual output queues (VOQs) which are grouped in l virtual output queues group with n VOQs; N×N switch fabric having l2 crossbar switch units for scheduling cells inputted from N input ports based on a first arbitration function based on a round-robin, wherein l VOQ groups are connected to l XSUs; and N output ports connected to l XSUs for selecting one cell from l XSUs in a cell time slot by scheduling cells by a second arbitration function based on a backlog weighed round-robin, which operates independently of the first arbitration function, and transferring the selected cell to its output link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.