1. User equipment, comprising:a transmission and reception unit configured to transmit and receive one or more radio signals to and from a base station; and
a capability information indication unit configured to transmit capability information to the base station in one or more of the radio signals,
the capability information includes information indicative of carrier aggregation (CA) capable carrier combinations and information regarding a relative arrangement of carriers in a case where carrier combinations are arranged within a same frequency band, and
the capability information indication unit indicates that all carrier combinations indicated in the capability information are CA capable carrier combinations.