TRANSMITTAL ACKNOWLEDGEMENT SIGNAL TRANSMISSION METHOD, MOBILE STATION, WIRELESS BASE STATION AND WIRELESS CHANNEL CONTROL STATION

摘要

PROBLEM TO BE SOLVED: To set a threshold value for judging a value assigned to a transmittal acknowledgement signal by taking into account collapse of the orthogonality under a high speed fading environment to thereby improve the performance of the HARQ and attain an increase in the transmission efficiency.

SOLUTION: A transmittal acknowledgement signal transmission method disclosed herein includes: a step where a wireless base station uses a plurality of orthogonal code sequences to transmit transmittal acknowledgement signals addressed to each mobile station and multiplexed on one channel, and a wireless channel control station ensures one orthogonal code sequence selected from a plurality of the orthogonal code sequences for a judgment code sequence without being used for multiplexing the transmittal acknowledgement signals; a step where the wireless channel control station informs each mobile station about the judgment code sequence; and a step where each mobile station judges the value assigned to the transmittal acknowledgement signal addressed to each mobile station by using the orthogonal code sequences used for multiplexing the transmittal acknowledgement signals addressed to each mobile station and the judgment code sequence.

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