Data communication method and data communication apparatus

Details Data communication method and data communication apparatus Data communication method and data communication apparatus

1997-03-04

1999-03-30

Moise, Emmanuel L.

Excavating

39518216, G08C 2502, H04L 118

Patent

active

058897909

ABSTRACT:
In a data communication method of transmitting data frames from a first predetermined frame number to a last predetermined frame number from a transmission side data communication apparatus to a reception side data communication apparatus in an ascending order (or a descending order), transmitting from the reception side data communication apparatus to the transmission side data communication apparatus a feedback frame having the same format as that of the data frame and indicating a first request frame number FB1(n) formed of a minimum (or maximum) frame number FBM(n) among the frame numbers of the data frames which have not been received in response to frame numbers of first to nth data frames received, and transmitting from the transmission side data communication apparatus to the reception side data communication apparatus a data frame which the reception side data communication apparatus has not confirmed, in response to the first request frame number indicated by the received feedback frame, the feedback frame also indicates a second repeat frame number numbers of data frames which have not been received to a kth request frame (where k is an integer exceeding 2) in response to frame numbers of the first to nth data frames which the reception side data communication apparatus has received.

REFERENCES:
patent: 4439859 (1984-03-01), Donnan
patent: 4841526 (1989-06-01), Wilson et al.
patent: 5165091 (1992-11-01), Lape et al.
patent: 5210751 (1993-05-01), Onoe et al.
patent: 5701312 (1997-12-01), DeLuca et al.
patent: 5754754 (1998-05-01), Dudley et al.

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