Switching devices
US7046626B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2001 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Aug 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a switching device (300) having a plurality of line interface cards (LICs) (310), a plurality of egress LICs (320), a cross-bar (330) and a management card (340). The switching device (300) routes fixed sized cells of data across the cross-bar (330). The cells comprise fragments of variable length data packets. Each ingress LIC (312, 314, 316) is associated with a respective schedule or timetable (362, 364, 366) governing the transmission of cells by the ingress LIC. Similarly, each egress LIC (322, 324, 326) is also associated with a respective schedule or timetable (382, 384, 386) governing the reception of cells by said egress LIC. The schedules are in the form of a table whose entries are the identities of transmission queues corresponding to a respective egress LIC identification number (for ingress LICs) and ingress LICs from which to receive (egress LICs). Each ingress and egress LIC maintains a pointer into its associated schedule. At each cell transmit time, each ingress LIC transmits a cell from the queue identified by the pointer and each egress LIC will receive the cell from the ingress LIC identified in the entry referenced by the pointer. The …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.