Communication method and apparatus for the efficient and reliable transmission of TT ethernet messages
US8396934B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 7, 2008 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Jul 23, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0655
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The goal of the present invention is to improve the useful data efficiency and reliability in the use of commercially available ETHERNET controllers, in a distributed real time computer system, by a number of node computers communicating via one or more communication channels by means of TT ETHERNET messages. To achieve this goal, a distinction is made between the node computer send time (KNSZPKT) and the network send time (NWSZPKT) of a message. The KNSZPKT must wait for the NWSZPKT, so that under all circumstances, the start of the message has arrived in the TT star coupler at the NWSZPKT, interpreted by the clock in the TT star coupler. The TT star coupler is modified, so that a message arriving from a node computer is delayed in an intelligent port of the TT star coupler until the NWSZPKT can send it precisely at the NWSZPKT into the TT network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.