Data transfer process with loop checking

Details Data transfer process with loop checking Data transfer process with loop checking

1990-01-26

1993-03-09

Beausoliel, Robert W.

Excavating

371 205, G06F 1100

Patent

active

051930935

ABSTRACT:
A data transfer process for transferring data from a first system to a second system while carrying out loop checking, including: a first step for sending out a part of the above data from the first system to the second system; a second step for sending first information that the part of the data has been sent out from the first system to the second system; a third step for receiving the above part of the data in the second system; a fourth step for sending out the part of the data, which has been received in the third step from the second system to the first system; a fifth step for sending second information that the part of the data has been sent out from the second system in the fourth step, a sixth step for receiving the part of the data, which has been sent from the second system, in the first system; a seventh step for determining whether or not the data which has been sent out from the first system in the first step and the data which has been received in the second system in the sixth step are equal; and an eighth step for resending the part of the data which has been sent out from the first system in the first step to the second system when the data compared in the seventh step.

REFERENCES:
patent: 3228000 (1966-01-01), Collis
patent: 3336576 (1967-08-01), Sourgens
patent: 3453592 (1969-07-01), Ishii et al.
patent: 4070648 (1978-01-01), Mergenthaler et al.
patent: 4271513 (1981-06-01), Maejima et al.
IBM Technical Disclosure Bulletin, Maiwald et al., "Error Recovery in Data Transmission" vol. B, No. 10, Mar. 1971.

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