Hybrid ARQ retransmission method with reduced buffer size...

Details Hybrid ARQ retransmission method with reduced buffer size... Hybrid ARQ retransmission method with reduced buffer size...

2006-02-21

2006-02-21

Tu, Christine T. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S794000, C375S341000

Reexamination Certificate

active

07003709

ABSTRACT:
A hybrid ARQ retransmission method in a communication system wherein data packets consisting of identical or partly identical modulation symbols encoded with a forward error correction (FEC) technique prior to transmission are retransmitted based on a repeat request and subsequently bit-level combined on the basis of soft-information values. The calculation of the soft-information values being input into an FEC decoder comprises the steps of calculating and buffering the soft-information values of the most significant bits (MSBs) of each (re)transmitted data packet; combining, for matching modulation symbols, the current soft-information values of the MSBs with the buffered soft-information values of at least one of the previous received transmitted packets; and calculating the soft information for at least some of the remaining bits (XSBs) from the combined soft information values of the MSBs.

REFERENCES:
patent: 6499128 (2002-12-01), Gerlach et al.
patent: 6625778 (2003-09-01), Nakamura et al.
patent: 2003/0074626 (2003-04-01), Coker et al.
patent: 0771092 (1997-05-01), None
patent: 1018816 (2000-07-01), None
Narayanan K. R. et al., “A Novel ARQ Technique Using the Turbo Coding Principle”, IEEE Communications Letters, IEEE Service Ceneter, vol. 1, ppgs. 49-51, Mar. 1997.
Law C-F et al, “A Modified Adaptive Hybrid FEC/ARQ Protocol Using Turbo Codes with Incremental Redundancy Transmission”, Vehicular Technology Conference, vol. 3, conf. 50, ppgs. 1670-1674, Sep. 1999.
S. Kallel; “Analysis of a Type II Hybrid ARQ Scheme with Code Combining”, IEEE Transactions on Communications, vol. 38, No. 8, Aug. 1990, pp. 1133-1137.
S. Kallel, et al.; “Throughput Performance of Memory ARQ Schemes”, IEEE Transactions on Vehicular Technology, vol. 48, No. 3, May 1999, pp. 891-899.
D. Chase; “Code Combining-A Maximum-Likelihood Decoding Approach for Combining an Arbitrary Number of Noisy Packets”, IEEE Transactions on Communications, vol. comm.-33, No. 5, May 1985, pp. 385-393.
B. A. Harvey, et al.; “Packet Combining Systems Based on the Viterbi Decoder”, IEEE Transactions on Communications, vol. 42, No. 2/3/4, Feb./Mar./Apr. 1994, pp. 1544-1557.
C. Berrou, et al.; “Near Shannon Limit Error-Correcting Coding and Decoding:Turbo-Codes(1)”, IEEE 1993, pp. 1064-1070.
S. Le Goff, et al.; “Turbo-Codes and High Spectral Efficiency Modulation”, Telecom Bretagne, France Telecom University, IEEE 1994, pp. 645-649.
A. Burr; Modulation and Coding for Wireless Communications, Pearson Education, Prentice Hall, pp. 132-135 and 310-315.

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