USER EQUIPMENT, BASE STATION AND METHOD IN MOBILE COMMUNICATION SYSTEM

摘要

User equipment comprises: an RI generating unit for generating, based on a downlink channel condition, a rank indicator; and a transmitting unit for transmitting, to a base station, an upstream signal including the rank indicator. In a case where a rank indicator is reported to the base station before category information of the user equipment is notified to the base station, the RI generating unit generates a rank indicator the number-of-bits of which is known to both of the user equipment and the base station.