| 摘要 |
PROBLEM TO BE SOLVED: To enable a terminal to autonomously change the used frequency when the communication quality of a used frequency is deteriorated, thereby preventing reduction of the transmission efficiency and transmitting data in real time.SOLUTION: A control signal processing unit 105 holds a use frequency and a backup frequency notified by a normally received downlink control signal (S 402) when normally receiving the downlink control signal (S401: YES), and frequency selection processing of assigning the presently notified use frequency to an uplink signal of a next frame is performed to start transmission of the uplink signal (S403). On the other hand, when the control signal processing unit 105 does not normally receive a downlink control signal (S401: NO), frequency selection processing of assigning, to the uplink signal, a spare frequency which is notified by the previously and normally received downlink control signal and held is performed (S404).SELECTED DRAWING: Figure 4 |
