Method and apparatus for selecting for use between data buses in

Details Method and apparatus for selecting for use between data buses in Method and apparatus for selecting for use between data buses in

1984-09-26

1986-12-16

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

34082501, H04J 302

Patent

active

046302654

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.

REFERENCES:
patent: 4076961 (1978-02-01), Holsinger et al.
patent: 4159470 (1979-06-01), Strojny et al.
patent: 4383314 (1983-05-01), Tam
patent: 4560985 (1985-12-01), Strecker et al.

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