FIELD: radio engineering, communication.
SUBSTANCE: terminal comprises: a quality measuring unit for measuring quality of reception of radio waves transmitted through multiple carriers from a base station of a connected cell to obtain a measured value; a fundamental carrier storage unit which stores information specifying the fundamental carrier, selected from multiple carriers; a comparator for comparing the measured value of the fundamental carrier, measured by the quality measuring unit, with a threshold value; and a cell search unit for searching another cell when the measured value of the fundamental carrier is less than or equal to the threshold value. Consequently, the search threshold for carrier aggregation can be determined accordingly.
EFFECT: facilitating cell search and measuring the quality of reception of radio waves for a communication terminal, capable of simultaneously communicating through multiple carriers through carrier aggregation.
13 cl, 34 dwg
