| 摘要 |
PROBLEM TO BE SOLVED: To attain improvement in communication quality by specifying a transmission failure factor at a mobile communication terminal side or at a network side. SOLUTION: The present invention comprises: a second latest transmission/reception signal holding section 300A of a radio management station; a communication failure factor judgement section 100D for judging a communication failure factor based on a latest transmission signal and a latest reception signal; of the radio management station held in the second latest transmission/reception signal holding section and a latest transmission signal and a latest reception signal in a mobile communication terminal held in a first latest transmission/reception signal holding section 100C; a communication failure information holding section 300B for holding, for each base station, the communication failure factor and communication transmission power from the communication failure factor judgement section and a latest transmission/reception power information holding section 100B for each mobile communication terminal; and a transmission power increase request section 300C for requesting increase in transmission power to a plurality of base stations when reception power of the plurality of mobile communication terminals is low and there are a lot of communication failures from the radio management station, and requesting increase in transmission power to a plurality of mobile communication terminals when transmission power of the plurality of mobile communication terminals is low and there are a number of transmission failures from the plurality of mobile communication terminals. COPYRIGHT: (C)2007,JPO&INPIT
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