RADIO COMMUNICATION SYSTEM, BASE STATION APPARATUS, USER TERMINAL, AND RADIO COMMUNICATION METHOD

摘要

The present invention is designed to measure interference with high accuracy in future systems that do not rely on CRSs. A base station apparatus has a determining section (401) that determines the resources to allocate desired signal measurement reference signals (CSI-RSs) and interference estimation reference signals to, and a reference signal generating section (405) that applies scrambling sequences and generates the interference estimation reference signal, and the scrambling sequences are controlled such that varying scrambling sequences are applied to the interference estimation reference signals between a plurality of transmission points or transmission point groups.

主权项

1. A radio communication system comprising a plurality of base station apparatuses that transmit desired signal measurement reference signals for measuring a channel state, and interference estimation reference signals, and a user terminal that connects with the plurality of base station apparatuses via radio links, wherein:
each base station apparatus comprises:
a determining section configured to determine resources where the desired signal measurement reference signals and the interference estimation reference signals are allocated; anda reference signal generating section configured to apply scrambling sequences and generate the interference estimation reference signals; and wherein, when at least the determining section allocates the interference estimation reference signals and interference estimation reference signals transmitted from another transmission point or from a plurality of other transmission points to the same resources, the reference signal generating section controls the scrambling sequence so that varying scrambling sequences are applied between a plurality of transmission points or transmission point groups where the interference estimation reference signals are allocated to the same resources.