| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless base station apparatus, capable of ensuring a proper CIR for a switch-back terminal when the terminal moves from a wireless base station during communication to other wireless base station by means of handover, and switches back to the original wireless base station in an SDMA communication system. SOLUTION: Each of the wireless base station apparatuses controls the directivity of an array antenna and forms a transmission beam with individual radiation patterns by each terminal to conduct wireless communication with each terminal in the SDMA wireless communication system detect reception errors of a signal transmitted from each terminal. When detecting errors consecutively from all the terminals for a prescribed period, each wireless base station apparatus carries out the control of omnibus transmission, wherein a transmission beam of a call channel of each terminal is switched alternately, and no directivity is provided in the particular direction of the radiation pattern. COPYRIGHT: (C)2008,JPO&INPIT
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