wireless communication system, base station apparatus, mobile station apparatus wireless communication method, control program for mobile station apparatus, and integrated circuit for base station apparatus and mobile station apparatus

摘要

wireless communication system, base station apparatus, mobile station apparatus, wireless communication method, control program for mobile station apparatus, and integrated circuit for base station apparatus and mobile station apparatus. The present invention relates to an efficient power safety margin transmission control that can be performed according to a frequency band to which carrier components to be subjected to frequency band aggregation belong, or with antenna configurations. transmitter and a power amplifier of a mobile station apparatus. The mobile station apparatus includes: a power safety margin control unit 2015 that manages a power safety margin which is a difference between a maximum transmit power value determined for each upstream bearer component by the base station apparatus and an estimated predetermined power value for upstream transmission; and a path loss measuring unit 209 that monitors a path loss of a downlink bearer component reported by the base station apparatus between a plurality of downlink bearer components, and when a downlink value path of any downlink bearer component changes more than a predetermined value, the power safety margin control unit 2015 decides to transmit to the base station apparatus the power safety margin margin for corresponding upstream transmission to all downlink bearer components set by the base station apparatus.