Radio bearer control method and radio base station

摘要

A radio bearer control method is disclosed that includes the steps of a radio base station transmitting a change request signal to a mobile terminal so that a communications condition set in the mobile terminal is changed, and the radio base station changing a communications condition set in the radio base station; the radio base station measuring the signal quality of a signal received from the mobile terminal; and the radio base station returning the changed communications condition to the communication condition before the change if the signal quality continues to be more degraded than a predetermined value for more than a predetermined period.