Multiplex communications – Diagnostic testing – Path check
Patent
1995-06-07
1997-10-07
Kim, Kenneth S.
Multiplex communications
Diagnostic testing
Path check
370241, 39520011, 39518319, H04L 114
Patent
active
056755791
ABSTRACT:
A processing system includes a number of communicatively interconnected system elements structured to send and receive data in the form of message packets. Message packets sent to a destination with expectation of response are timed, and if no response is received within an allotted time, a barrier transaction message packet is sent to the destination. The destination is required to provide a barrier transaction response to the barrier transaction packet only after it has responded to, or discarded, all prior received message packets requiring response by the destination. When the source of the barrier transaction message packet receives the barrier transaction response it can be assured that the communication path to the destination is in order, and no prior (late) responses will be forthcoming.
REFERENCES:
patent: 4750175 (1988-06-01), Brenneman et al.
patent: 5089954 (1992-02-01), Rago
patent: 5477531 (1995-12-01), McKee et al.
Baker William Edward
Bruckert William F.
Bunton William Patterson
Garcia David J.
Horst Robert W.
Kim Kenneth S.
Tandem Computers Incorporated
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