COMMUNICATION SYSTEM, RESPONSE NOTIFYING METHOD AND APPARATUS

摘要

To solve a problem that unless all of a plurality of AICH signature states are correctly decoded, the contents of reception results cannot be confirmed and the error rate of signature decoding will be high. A base station uses, out of a signature combination, the signature of at least one predetermined position to indicate information including a preamble reception result and also uses the signature of a position other than the predetermined position to indicate an upstream-channel transmission profile information number for notification to a mobile station. Thus, the error rate related to the reception results can be reduced as compared with the case where a single signature combination is used to notify all pieces of information.