A device in a wireless communication system that includes circuitry that acquires location information of user equipment, calculates, according to at least the location information, stay time required for the user equipment to pass through the small cell, the stay time being a limited time, evaluates a mobility state of the user equipment according to the location information of the user equipment at different time by comparing the calculated stay time with a predetermined stay time threshold value, determines an operation from among a plurality of operations related to small cell detection according to changes in the mobility state and the location information of the user equipment, and execute the determined operation related to small cell detection.