Method and system for secure transmission of process data to be transmitted cyclically via a transmission channel between a master and a slave
US8321613B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2008 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Jul 19, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2001/0094
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and system for secure transmission of process data to be transmitted cyclically in a cyclical data transmission to be performed protocol-specifically via a transmission channel between a user functioning as a master and at least one user functioning as a slave that are connected to the transmission channel. Within a transmission protocol frame, a time slot that can always accommodate the same number of bits independently of the data to be transmitted is assigned to each slave during a data transmission cycle. For safety-relevant process data that is to be transmitted during a data transmission cycle from a slave to at least one additional user, or that is to be transmitted during a data transmission cycle from a user to at least one slave, additional first protection data for recognizing error-free transmission of this safety-relevant process data is generated and transmitted in each case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.