Multiplex communications – Wide area network – Packet switching
Patent
1995-09-28
1996-11-26
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 942, 370 79, 371 41, H04J 314
Patent
active
055793037
ABSTRACT:
In a data transmission apparatus, a data coding section codes input data and outputs the coded data. A error correction execution determining section determines execution
on-execution of error-correcting coding on the basis of a congestion state and a bit error generation state in a network, and generates determination information. A frame formation section multiplexes the determination information with the coded data in units of frames, and generates frame data having a predetermined frame format. A error-correcting coding section executes error-correcting coding for the coded data in units of frames in accordance with the determination information contained in the frame data, and generates frame length information representing a frame length of a frame for which error-correcting coding is executed. When the determination information contained in the frame data represents non-execution of error-correcting coding, a variable delay circuit delays the frame data of the frame, for which error-correcting coding is not executed, by a frame length indicated by frame length information of an immediately preceding frame for which error-correcting coding is to be executed. A selector outputs data from the data coding section and the variable delay circuit in a time-serial manner.
REFERENCES:
patent: 5379305 (1995-01-01), Weng
patent: 5400329 (1995-03-01), Tokura et al.
patent: 5490168 (1996-02-01), Phillips et al.
patent: 5513191 (1996-04-01), Takechi et al.
Jung Min
NEC Corporation
Olms Douglas W.
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