Patent ID: 9338764
Filing Date: 2016-05-10
CPC Classification: H04L,H04W

Claim Text:
1. A radio communication system, comprising: a base station having a plurality of antennas; and a mobile station for performing a radio communication by connecting to the base station, wherein the base station assigns a radio resource to the mobile station, transmits information of the assigned radio resource to the mobile station, and based on a sounding reference signal (SRS) from the mobile station, calculates a weight used for transmitting a radio signal to the mobile station, and the mobile station receives the information, and when, in the information, an uplink radio resource in the same frequency band as a downlink radio resource assigned to the mobile station is not assigned to the mobile station, transmits to the base station the sounding reference signal by using a reference signal region of an uplink radio resource that is not assigned to the mobile station in the same frequency band as the downlink radio resource.