USER TERMINAL AND RADIO COMMUNICATION METHOD

摘要

The present invention is designed to enable adequate transmission power control when inter-base station CA is employed. When inter-base station CA is employed, radio base stations detect when a user terminal's transmission power reaches the maximum transmission power, and execute control to cancel this. For example, a user terminal has a transmission section that transmits an uplink physical channel to each component carrier, a power headroom generating section that generates power headroom, which is extra transmission power of the subject terminal, and a control section that, when the value of the power headroom becomes 0 or less, executes control so that the power headroom is triggered and reported to the radio base stations.

主权项

1. A user terminal that communicates by applying carrier aggregation in which a plurality of radio base stations, connected via non-ideal backhauls, are each made a component carrier, the user terminal comprising:
a transmission section that transmits an uplink physical channel to each component carrier; a power headroom generating section that generates power headroom which is extra transmission power of the user terminal; and a control section that, when a value of the power headroom becomes 0 or less, executes control so that the power headroom is triggered and reported to the radio base stations.