Patent ID: 9232518
Filing Date: 2016-01-05
CPC Classification: H04L,H04W

Claim Text:
1. A base station comprising: a communication section for performing communication using a plurality of antennas, said communication section controlling the transmission directivity of the plurality of antennas, based on a known signal transmitted from a communication terminal, when performing downlink communication; a radio resource allocating section for allocating a downlink radio resource used for the transmission of a signal to a communication terminal by said communication section to the communication terminal and for allocating an uplink radio resource used for the transmission of the known signal by a communication terminal to the communication terminal; and a grouping processing section for classifying a plurality of communication terminals with which said communication section communicates into a first terminal group executing an application with high communication quality of transfer data and a second terminal group executing an application with low communication quality of transfer data, wherein a unit period is determined in which an uplink radio resource for a-known signal usable for the transmission of said known signal by a communication terminal and a downlink radio resource appear, and wherein a correspondence between the downlink radio resource and said uplink radio resource for said known signal is defined for null steering based on said known signal in said unit period.