User equipment and radio communication method
AssigneeNtt Docomo, Inc.
InventorsYousuke Sano, Kazuaki Takeda, Satoshi Nagata
Life of this patent
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Abstract
Provided is a user equipment in a radio communication system that includes a plurality of user equipments and a base station and supports a communication scheme in which uplink radio resources are shared by the plurality of user equipments, and the user equipment includes a control unit that determines that retransmission of an uplink signal is performed when NACK is received from the base station with respect to the uplink signal or when none of ACK and NACK are received with respect to the uplink signal and a transmitting unit that retransmits the uplink signal on the basis of a predetermined retransmission scheme when the control unit determines that the retransmission of the uplink signal is performed.
Claims12
A user equipment in a radio communication system that includes a plurality of user equipments and a base station and supports a communication scheme in which uplink radio resources are shared by the plurality of user equipments, the user equipment comprising:
- a control unit that determines that retransmission of an uplink signal is performed when NACK is received from the base station with respect to the uplink signal or when none of ACK and NACK are received with respect to the uplink signal;
- and
- a transmitting unit that retransmits the uplink signal on the basis of a predetermined retransmission scheme when the control unit determines that the retransmission of the uplink signal is performed.
A radio communication method performed by a user equipment in a radio communication system that includes a plurality of user equipments and a base station and supports a communication scheme in which uplink radio resources are shared by the plurality of user equipments, the radio communication method comprising:
- a step of determining that retransmission of an uplink signal is performed when NACK is received from the base station with respect to the uplink signal or when none of ACK and NACK are received with respect to the uplink signal;
- and
- a step of retransmitting the uplink signal on the basis of a predetermined retransmission scheme when the retransmission of the uplink signal is determined to be performed.
Dependencies are inferred from the claim text.