Guaranteed message delivery from a data handling computer to man

Details Guaranteed message delivery from a data handling computer to man Guaranteed message delivery from a data handling computer to man

1991-03-18

1994-01-04

Lee, Thomas C.

Boots, shoes, and leggings

395325, 395650, 3642409, 36424295, 364268, 3642851, 371 111, G06F 1300

Patent

active

052768619

ABSTRACT:
In a distributed computer network having a large number of intercommunicating distributed nodes and a smaller number of control nodes in which each distributed node reports status information to a particular one of the control nodes, a method is provided for guaranteeing that at least one control node receives a status message from a distributed node despite the unavailability of the particular control node to which the distributed node normally sends its status messages. Each distributed node associates a serial number and time stamp and an identification of itself with each message it originates, and each distributed node retains copies of the messages. Should a distributed node be unsuccessful in transmitting to its normal control node it attempts to transmit to other control nodes until it transmits successfully. A control node assigned to assume the functions of an failed control node requests a distributed node formerly associated with the unavailable control node to resend all messages it originated within a period of time sufficiently long that at least all messages sent to the failed control since its failure are resent. Since replicate messages may be sent to a plurality of control nodes under this method, replicates are resolved by comparing the time stamps and originating node identifications.

REFERENCES:
patent: 4266271 (1981-05-01), Chamoff et al.
patent: 4663706 (1987-05-01), Allen et al.
patent: 4667287 (1987-05-01), Allen et al.
patent: 5058056 (1991-10-01), Hammer et al.

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