In a data communications systems a method of forward error corre

Details In a data communications systems a method of forward error corre In a data communications systems a method of forward error corre

1994-03-28

1996-08-20

Baker, Stephen M.

Excavating

371 377, H04L 100, H04L 116

Patent

active

055485987

ABSTRACT:
An improved method of forward error correction in a data communications system that includes receiving a data frame that includes a filler symbol, detecting an error in the data frame, replacing the filler symbol with a predetermined symbol, and determining when the error has been corrected. Detecting the error includes performing a first parity check, preferably a CRC computation that is repeated a second time, after replacing the filler symbol, to determine when the error has been corrected. When replacing the filler symbol(s) has corrected the error, an automatic retry request may be foregone thus conserving channel capacity.

REFERENCES:
patent: 4584685 (1986-04-01), Gajjar
Chase, D., "Code Combining-A Maximum Likelihood Decoding Approach for Combining an Arbitrary Number of Noisy Packets", IEEE Trans. on Comm., vol. COM-33, No. 5, May 1985, pp. 385-393.
Wicker, S., "Adaptive Rate Error Control Through the Use of Diversity Combining and Majority-Logic Decoding in a Hybrid-ARQ Protocol", IEEE Trans. on Comm., vol. 39, No. 3, Mar. 1991, pp. 380-385.

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