METHOD AND APPARATUS FOR CELL DETECTION IN UNLICENSED COMMUNICATION SYSTEMS

A method comprising including controlling a receiver to attempt to receive a reference signal for cell discovery and/or cell signal measurement, wherein the reference signal is expected to be transmitted at a determined power level within a reference signal transmission window with instances of the reference signal transmission window separated by a first interval and the receiver is controlled to be able to receive the reference signal at a reference signal measurement time, with instances of the reference signal measurement time separated by a second interval; determining at the receiver at least one missing reference signal instance during the reference signal measurement time; and controlling the receiver to be able to receive at least one further reference signal instance at a further reference signal measurement time, the separation of the further reference signal measurement time and the reference signal measurement time being less than the second interval.