STM-N signal error correction coding system and method

Details STM-N signal error correction coding system and method STM-N signal error correction coding system and method

1997-04-14

1999-07-27

DeCady, Albert

Excavating

H03M 1300

Patent

active

059302739

ABSTRACT:
Transmission error correction is performed by generating an extremely small number of error correction code bits even when the value of N in STM-N (Synchronous Transport Module Level N) becomes large. The sending signal input terminal receives four AU-4 signals, and the serial/parallel conversion circuit converts the signals to eight parallel signals. The number of check bits required for encoding eight parallel bits is 14. The error correction encoder provided for the first bit divides a received data stream by a polynomial and sends the resulting remainder to the check bit output terminal 1 as the check bit. Each of the error correction encoders calculates the check bits of data streams using the polynomial and sends the results to check bit output terminals 2-8. The {n, k} shortened Hamming code is executed for each bit by inserting these check bits into undefined bytes in the multiplex-section overhead (MSOH).

REFERENCES:
patent: 5574717 (1996-11-01), Tomizawa et al.
Yoshiaki Yamabayashi et al., A Bit-Interleaved Hamming Code for Linearly Repeatered Terrestrial Fiber Optic Transmission Systems, pp. 6-1-6-3.
M. Tomizawa et al., "Foward Error Correcting Codes for Arbitrary Multiplexing Levels in SDH Fiber Optical Transmission Systems," B-1704, p. 520 (1995).
V. Paxal et al., "Error-Correction Coding for High-Speed Optical Transmission Systems Based on the Synchronous Digital Hierarchy," European Transactions on Telecommunications and Related Technologies, vol. 4, No. 6, pp. 623-628, (1993).
Wayne D. Grover et al., "Design and Characterization of an Error-Correcting Code for the SONET STS-1 Tributary," IEEE Transactions on Communications, vol. 38, No. 4, pp. 467-476 (1990).
Y. Yamabayashi et al., Bit-interleaved Hamming code for linearly repeatered terrestrial SDH transmission systems, Electronics Letters, vol. 31, No. 8, pp. 608-609 (1995).

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