| 摘要 |
PROBLEM TO BE SOLVED: To provide the mobile communication system without the following problems: a mobile communication system using an existing cell configuration has a problem of a quality degradation since a received level decreases as a mobile device gets away from a base station, especially for a high speed data transmission, a quality and a throughput degrades caused by an increase in an error rate due to decrease of a received level, thus, it is required to decrease a transmission speed, however, this causes a problem of a degradation of voice quality in a voice transmission, this problem can be solved by reducing a cell radius but a problem of large increase in system cost arises, meanwhile, when a quality is improved by expanding a hand-off area, a problem of a decrease in a capacity arises. SOLUTION: The system uses a single base station configuration reduced size cell in which the mobile device communicates with the only base station when the mobile device exists within a certain distance from the base station and a plurality of base stations configuration cell in which the mobile device communicates with the plurality of base stations when a distance between the mobile device and the base station is equal or greater than the certain distance. A high quality and a capacity can be maintained by these two kinds of cells when the mobile device exists at any location in a service area. COPYRIGHT: (C)2005,JPO&NCIPI
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