| 摘要 |
A radio base station (1) determines, based on the condition of an uplink communication channel, an element of the feedback of a code block communication quality, which is the quality of a downlink communication channel, by a radio terminal (2). Further, the radio base station (1) transmits feedback control information including a mode of the feedback to the radio terminal (2). On the other hand, the radio terminal (2) determines, based on the received feedback control information, the mode of the feedback and uses the uplink communication channel to transmit the code block communication quality, which is the quality of the downlink communication channel, to the radio base station (1). The radio base station (1) performs, based on the received code block communication quality, a retransmission control of the code block.
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