| 摘要 |
<p>One or more code channels for which a required channel quality of first class relative to a low-power channel such as a voice communication channel is determined is established between a base station and a radio terminal. In this state, an additional channel of second class having a channel quality request value higher than that of the code channel, for example, a high-speed data channel is set up. The radio terminal or base station determines the transmission power value of this second-class channel in such a way that the value is lower than the transmission power value not influencing the first class channel quality which is set up according to the power distribution based on the current interference level. After the set up of the radio channel, the transmission rate and transmission power are gradually increased while monitoring the interference levels of the other channels to the values which fulfill the required channel quality of second class.</p> |
