| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase in reception errors in a data signal region due to interference with a control channel in the downlink of an OFDM system.SOLUTION: A mobile station device 30 detects an interfering cell interfering with radio communication in the downlink by OFDM between the mobile station device and a small base station 20 of an in-zone cell where the mobile station device is camping. Further, it receives a reference signal from the base station 20 of the in-zone cell, and estimates a transmission path response between it and the base station 20 of the in-zone cell on the basis of the reference signal. In addition, it receives a reference signal from a macro base station 10 of the interfering cell, and estimates a transmission path response between it and the base station 10 of the interfering cell on the basis of the reference signal. On the basis of the estimation results of these multiple transmission path responses and information on a transmission system used for a control channel of the downlink, the mobile station device suppresses or cancels an interference signal from the base station 10 of the interfering cell in the control channel. |
