Re-transmission control method, radio terminal, and radio base station

A radio terminal capable of performing re-transmission control of downlink data transmitted from a radio base station, the radio terminal comprising:

• a controller configured to operate the radio terminal to
• transmit information regarding decoding performance of the radio terminal to the radio base station, the decoding performance of the radio terminal including one or more parameters selected from a group of parameters consisting of an index value, a code rate, and a maximum decoder throughput,
• receive the downlink data from the radio base station,
• transmit a re-transmission request of the downlink data to the radio base station in a case where an error is detected in the downlink data,
• receive a re-transmission configuration based on the information regarding the decoding performance of the radio terminal from the radio base station in a physical downlink control channel (PDCCH), after the re-transmission request is transmitted,
• receive the downlink data which has been re-transmitted from the radio base station, and
• decode the re-transmitted downlink data in accordance with the re-transmission configuration.

A radio base station capable of performing re-transmission control of downlink data to be transmitted to a radio terminal, the radio base station comprising:

• a controller configured to operate the radio base station to
• receive information regarding decoding performance of the radio terminal from the radio terminal, the decoding performance of the radio terminal including one or more parameters selected from a group of parameters consisting of an index value, a code rate, and a maximum decoder throughput,
• transmit the downlink data to the radio terminal,
• in a case where a re-transmission request indicating that an error is detected in the downlink data is received from the radio terminal, transmit re-transmission configuration based on the information regarding the decoding performance of the radio terminal to the radio terminal in a physical downlink control channel (PDCCH), and
• transmit the downlink data indicated by the re-transmission request to the radio terminal in accordance with the re-transmission configuration and causes the radio terminal to decode the downlink data in accordance with the re-transmission configuration.