Patent ID: 9419760
Filing Date: 2016-08-16
CPC Classification: H04J,H04L,H04W

Claim Text:
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; and a 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, and wherein the determining section determines the resources such that the interference estimation reference signals are randomly arranged in a downlink data channel region.