Method and apparatus for selecting for use between data buses in a redundant bus communication system
US4630265A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Sep 26, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/74
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
For use in a communications system in which a plurality of communication devices are connected to a plurality of buses in a redundant communication type system in which the same data is concurrently transmitted between the communication devices over the plurality of buses, a scheme determines which of the buses should be utilized for the reception of data through the examination of each of the buses for the existence of transmitted data. Upon determining that data is present on any of the buses, there is established a first period of time which terminates a fixed increment of time after data is absent from all of the buses. An indication is then provided for each bus which has data thereon during said first period of time and extending at least through a second fixed increment of time beyond that first period of time. The bus to be utilized is then selected from those which is found to have data during the first period of time on the basis of an algorithm which does not switch buses unless the bus previously connected to did not contain data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.