There is provided a UE in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; and at least one computer memory storing instructions that, based on being executed by the at least one processor, perform operations comprising: receiving a capability enquiry message from a serving cell; transmitting a capability information to the serving cell, based on that the capability enquiry message is received; and transmitting an uplink signal based on first CC within a NR TDD operating band; and receiving a downlink signal based on second CC within NR TDD operating band.