SYNCHRONIZATION SIGNAL TRANSMISSION METHOD AND BASE STATION DEVICE

摘要

PROBLEM TO BE SOLVED: To have a communication system employing massive-MIMO fully exert its performance.SOLUTION: A base station device controls the transmission direction of a transmission beam for a synchronization signal used in cell search by beam forming using a plurality of antenna elements, comprising: a synchronization signal processing unit (62) that generates a synchronization signal including information enabling identifying a transmission beam for the synchronization signal and changes a beam forming weight for the synchronization signal at a prescribed time interval; and a transmission unit (64) that transmits the synchronization signals generated according to the respective beam forming weights in a downlink.