RADIO APPARATUS, RADIO CONTROL APPARATUS AND COMMUNICATION CONTROL METHOD

摘要

The objective of the invention is to reduce bands necessary on an optical transmission path (30) in a base station system including a BBU (11) and an RAU (21) using a plurality of antenna elements to perform MIMO transmissions. According to a communication control method of the invention, the BBU (11) transmits transmission signals and antenna weight factor information indicating antenna weight factors of the plurality of antenna elements (205). The RAU (21) multiplies the transmission signals from the BBU (11) by the antenna weight factors, thereby generating weighted signals of the plurality of antenna elements (205), and then transmits the weighted signals from the plurality of antenna elements (205).