SYNCHRONIZATION SIGNAL RECEPTION METHOD AND MOBILE STATION DEVICE

摘要

The purpose of the present invention is to sufficiently bring out the performance of a communication system in which massive MIMO is employed. Disclosed is a mobile station device that receives synchronization signals from a base station device which controls, by beamforming using a plurality of antenna elements, the transmission direction of a transmission beam for the synchronization signals used for a cell search, the mobile station device comprising: a reception unit (74) that receives synchronization signals including information with which the transmission beam for the synchronization signals can be identified; a generation unit (732) that generates a RACH preamble including information with which the transmission beam for the synchronization signals can be identified; and a transmission unit (75) that transmits, to the base station device, a transmission signal including the RACH preamble.