Methods and systems preventing frame mis-ordering in explicitly routed networks
US7525960B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2002 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Dec 5, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods, systems and apparatus are provided which prevent frame mis-ordering in an explicitly routed network when switching from a first path to a second path. In a first embodiment, last frame and first frame markers are transmitted, and a receiver buffers all frames received between receipt of the last frame marker and the first frame marker. In a second embodiment, a last frame marker is sent to which an acknowledgement must be received before transmitting on the second path. In a third embodiment, only a first frame marker is sent. The receiver, upon receipt, signals a network card for the first path to stop forwarding frames, also buffers frames for some period. In a fourth embodiment, the merge point node forwards frames over different paths with unique markings so the outgoing card can distinguish them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.