| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To grasp a reception state of a radio terminal equipment and to appropriately control directivity of a transmission antenna based on a DRC signal transmitted from the radio terminal equipment. <P>SOLUTION: A base station device is provided with an antenna and a control unit for controlling directivity of the antenna, and communicates with a radio terminal equipment. The antenna is an adaptive antenna having a plurality of antenna elements and a phase device which changes a phase of a power supplied to the antenna elements, and the control unit is provided with a reception state acquiring means for acquiring a signal concerning a reception state of the radio terminal equipment from the radio terminal equipment, and a directivity control means for switching and controlling the directivity of the antenna based on the signal concerning the reception state of the radio terminal equipment acquired. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
