Patent ID: 9596631
Date: 2017-03-14
CPC Classifications: H04L,H04W

Claim:
1. A communication terminal comprising: communication circuitry configured to communicate with a first base station simultaneously through a plurality of carriers by carrier aggregation, wherein the plurality of carriers include at least a primary carrier through which the communication terminal is connected to a serving primary cell and a secondary carrier through which the communication terminal is connected to a serving secondary cell, the serving primary and secondary cells being supported by the first base station, and control circuitry configured to measure the reception quality of radio signals transmitted through the plurality of carriers from the first base station to obtain measured values, and compare the measured value of the primary carrier to a first threshold value, and compare the measured value of the secondary carrier to a second threshold value; wherein the control circuitry, when discontinuous reception (DRX) is enabled, when the DRX is disabled, determines whether or not to perform the cell search based on the measured value of the primary carrier and the measured value of the secondary carrier.