Mobile terminal apparatus and radio base station apparatus when carrier aggregation aggregating multiple component carriers is performed

摘要

A mobile terminal apparatus and radio base station apparatus supporting each of a plurality of mobile communication systems when the plurality of mobile communication systems coexists is disclosed, wherein the mobile terminal apparatus is a mobile terminal apparatus in a radio communication system for performing transmission and reception in uplink and downlink, each assigned to a relatively wide system band obtained by aggregating a plurality of component carriers, each of which is a relatively narrow system band, and has coding and data modulation sections that perform coding and data modulation on uplink control signals including report information of individual component carriers assigned to downlink, and mapping sections that map the control signals subjected to coding and data modulation to uplink communication channels.