Controller area network (CAN) worst-case message latency with priority inversion
US9294412B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 29, 2013 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | May 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5613
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This application discloses determining a worst-case latency in a controller area network (CAN) for messages experiencing priority inversion within individual controllers. A system to determine the worst-case latency can include a memory system to store computer-executable instructions and a computing system, in response to execution of the computer-executable instructions, can identify that a controller area network (CAN) design includes a controller configured to sequence messages for transmission over a shared bus with at least one of the messages experiencing priority inversion. The computing system also can determine a delay for the controller to present a first message to the shared bus for transmission when the first message is ordered behind a second message having a lower priority than the first message. The delay may be a portion of the worst-case latency corresponding to the priority inversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.