| 摘要 |
A radio communication system includes a user apparatus, a base transceiver station and a radio network controller. The base transceiver station requests the user apparatus to resend data when the base transceiver station does not receive the data, and counts the number of sending of the data sent from the user apparatus. The radio network controller receives, from the base transceiver station, the number of sending of the data sent from the user apparatus, and determines a target Signal to Interference Ratio (SIR) based on the number of sending of the data sent from the user apparatus.
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