Power-limit reporting in a communication system using carrier aggregation

A communication apparatus comprising:

• circuitry which, in operation, generates a power status report of the communication apparatus in a communication system using component carrier aggregation, in which two or more component carriers (CCs) are aggregated, wherein the power status report includes:
• (i) a CC specific maximum transmission power, PCMAX,c, for each configured and activated uplink CC, wherein PCMAX,c shall be set within following bounds:
• PCMAX_L,c<=PCMAX,c<=PCMAX_H,c
• where PCMAX_L,c is a lower bound and PCMAX_H,c is a higher bound of a CC specific maximum transmission power, and (ii) a power headroom report indicative of a difference between the CC specific maximum transmission power, PCMAX,c, and an estimated communication apparatus transmit power, per each configured and activated uplink CC,
• wherein the CC specific maximum transmission power, PCMAX,c, for each configured and activated CC is included in the power status report when a resource is allocated to the configured and activated uplink CC for the communication apparatus;
• and
• a transmitter configured to transmit the power status report to the base station.