| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio communication system, a radio communication terminal, a radio base station and a radio communication method that can acquire information of an upward radio communication channel more securely while improving the use efficiency of a downward frame. SOLUTION: When the radio communication terminal 200 can receive control information transmitted using a map region, the radio communication terminal 200 receives an AAS-DLFP transmitted using a particular region and made to correspond to the control information. The radio communication terminal 200 when receiving the AAS-DLFP transmits a ranging code giving notice of the reception of the AAS-DLFP to the radio base station 100. The radio base station 100 when receiving the ranging code from the radio communication terminal 200 transmits a private map for the radio communication terminal 200 to the radio communication terminal 200 by a directivity beam. COPYRIGHT: (C)2008,JPO&INPIT
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