Alternatively, the UE 100 may autonomously set the uplink transmission ratio and the downlink transmission ratio such that the usage rate of the WLAN communication is reduced to below a threshold value (for example, 100 (cellular communication) to 0 (WLAN communication)). For example, when the UE 100 detects a radio link failure in the WLAN communication and transmits a radio link failure report to the eNB 200, the eNB 200 may determine that the UE 100 autonomously sets the uplink transmission ratio and the downlink transmission ratio.
It is noted that when a radio link failure in the WLAN communication occurs, the eNB 200 may reduce the amount of transmission data in the WLAN communication. This increases the amount of transmission data in the cellular communication, and as a result, the usage rate of the WLAN communication is reduced.
When the radio link failure in the WLAN communication is recovered, the UE 100 may autonomously return the uplink transmission ratio and the downlink transmission ratio to a setting value before the radio link failure in the WLAN communication occurs. Alternatively, the UE 100 may newly set, on the basis of the control information received from the eNB 200, the uplink transmission ratio and the downlink transmission ratio, after the radio link failure in the WLAN communication is recovered.