Patent ID: 8837313
Filing Date: 2014-09-16
Classification: H04W,Y02D

Abstract:
1. A mobile communication method, which configures a discontinuous reception (DRX) cycle having an On duration in which a downlink signal transmitted from a serving base station is to be monitored and an Off duration in which a receiver of radio terminal is turned off in a radio resource control (RRC) connected state where an RRC connection is established between a radio terminal and a radio base station, the mobile communication method comprising: a step A of measuring, at the radio terminal, reception quality of a reference signal transmitted from a cell even in the Off duration when the DRX cycle is configured; and a step B of measuring, at the radio terminal, reception quality of a reference signal, which is transmitted from an adjacent cell other than a serving cell of the serving base station using a frequency band same as a frequency band of the serving cell, in the On duration, or reception quality of a reference signal, which is transmitted from an adjacent cell other than the serving cell using a frequency band different from a frequency band of the serving cell, in a measurement gap duration configured in the On duration, wherein, the radio terminal performs the step A when the reception quality measured in the step B satisfies a predetermined condition.