Multicast buffered switch and method for operating a multicast buffered switch
US6940856B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2001 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Mar 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5681
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In an NXN switch a plurality of buses interconnect the individual input modules to all of the output modules in a predetermined sequence. The input modules store the received cells and a unique ID. When selected the input module places a cell and its ID on selected ones of the buses along with a multicast vector which identities which of the output modules is to process the cell on a bus. The output modules examine the multicast vector and process the cell (table lookup) if selected In the multicast vector. If an output module is unable to process a required cell (successful table lockup) it sets a retry vector resident on the bus and the input module modifies the multicast vector to indicate only those output module(s) which failed to process a required cell. The cell, the ID and the modified multicast vector are placed on a bus in a subsequent selection of that input module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.