| 摘要 |
The present invention provides a CQI informing method that, in a mobile station of a mobile communication system, can reduce the usage rate of wireless resources required when a CQI value of each of a plurality of partial bands RBs (Resource Block), into which a system band is divided, is sent to a base station. The mobile station obtains the CQI value by measuring a receiving quality of each RB by the CQI measuring section. In a communication system for measuring communication channel qualities of one or more partial bands of a communication band in a downlink channel that is divided into a plurality of partial bands in a mobile station and sending the measurements to a base station as communication channel quality information via an uplink channel, the mobile station comprises a section for representing the communication channel qualities of the partial bands, which are the measurements, by relative value information in a frequency direction and sending the communication channel qualities to the base station as the communication channel quality information at a first timing and a section for representing the communication channel qualities of the partial bands, which are the measurements, by relative value information in a time direction for the partial band before a second timing and sending the communication channel qualities to the base station as the communication channel quality information at the second timing.
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