| 摘要 |
PROBLEM TO BE SOLVED: To improve the reception characteristic of a control signal.SOLUTION: In a communication system 100, a common pilot signal to each radio terminal 131, 132 in cells 121, 122 is transmitted at first timing t1 by using frequencies f1, f2 based on identification information on the cell per cell. A radio base station 111 transmits a common pilot signal at the first timing t1 and transmits an individual pilot signal to the radio terminal 131 in the cell 121 formed by itself and a control signal to the radio terminal 131 in the cell 121 formed by itself at second timing t2 different from the first timing t1 using different frequencies f1-f3. The radio terminal 131 demodulates the control signal transmitted by the radio base station 111 on the basis of the individual pilot signal transmitted by the radio base station 111.SELECTED DRAWING: Figure 1 |
