Lower wireless base station, upper wireless base station, and wireless base station system

摘要

The lower base station (20) according to the present invention includes a CSI acquisition unit (221) for acquiring transmission path information indicating a state of a transmission path with one or more mobile terminals, and a lower level base station (10) ), And based on the data transmission rate of the destination terminal, which is a mobile terminal selected from among the one or more mobile terminals notified by the upper radio base station, and It comprises a lower scheduler section (21) for determining the number of signal streams and a modulation and coding scheme, and an MU-MIMO signal processing section (222) for performing Multi User-Multiple Input Multiple Output precoding for mobile terminals.