IP switch, interface circuit and ATM switch used for IP switch, and IP switch network system
US6304555A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1997 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Dec 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5667
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a system in which communication is performed among a plurality of devices having a mechanism of disassembling a packet into ATM cells to send them and a plurality of devices having a mechanism of assembling the received ATM cells into the packet, a frame is prevented from being lost owing to change of virtual connections in the course of transferring the frame, improving reliability of the communication on the packet level. When the switch receives a request for change of switching, it does not processes that request at once, but confirms that the cell located at the boundary of the frame has been processed, before processing the change request, so as to protect the frame. When the switch receives a request for change of switching, it protects a frame by multicasting the cells to both destinations before change and after change, for a given period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.