Advanced telecommunications router and crossbar switch controller
US7426216B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | Jan 16, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/3045
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a crossbar switch controller including an input terminal configured to receive a set of service request signals from a set of virtual output queues each comprising a set of packets. It also includes a matrix circuit coupled to the input terminal and configured to represent the set of service request signals in the form of a matrix, wherein each service request signal is described by a row position M and a column position N. An output terminal is configured to receive a portion of the set of packets during an epoch, an arbiter circuit configured to iteratively scan the matrix during the epoch and issue the set of grant signals to the virtual output queues to determine which service requests are granted, and an arbiter controller configured to initiate the arbiter circuit with an array of non-conflicting matrix elements. The Arbiter is configured to scan the matrix during a first epoch, issues the set of grant signals, allows the set of granted service requests to substantially complete, and if necessary, scans the matrix during subsequent epochs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.