Patent ID: 8483134
Filing Date: 2013-07-09
Classification: H04B,H04L,H04W

Abstract:
1. A radio transmission apparatus that transmits a signal using one of a plurality of different communication methods, said radio transmission apparatus comprising: a calculator that calculates power headroom of said radio transmission apparatus; a setter that sets a threshold value depending on a communication method that the radio transmission apparatus uses; and a transmitter that transmits information indicating the power headroom or requesting a switch between the communication methods based on a comparison between the power headroom and the threshold value, wherein the communication methods include a first communication method and a second communication method, the setter sets a first threshold value when the first communication method is used, and sets a second threshold value when the second communication method is used, the second threshold value being lower than the first threshold value, and the transmitter transmits the information when the power headroom is lower than the set first threshold value and transmits the information when the power headroom is greater than the set second threshold value.