Radio transmission device and radio transmission method
AssigneePanasonic Intellectual Property Corporation of America
InventorsDaichi Imamura, Hidetoshi Suzuki, Akihiko Nishio, Atsushi Matsumoto
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Abstract
Provided are a radio transmission device and a radio transmission method capable of improving downlink and uplink throughput even when performing dynamic symbol allocation. In the device and the method, BS and MS share a table correlating a basic TF as a combination of parameters such as TB size used for transmitting only user data, an allocation RB quantity, a modulation method, and an encoding ratio, with a derived TF having user data of different TB size by combining L1/L2 control information. Even when multiplexing L1/L2 control information, Index corresponding to the basic TF is reported from BS to MS.
Claims12
A radio transmission apparatus comprising:
- an uplink scheduler which, in operation, determines an uplink transmission format and selects an index corresponding to the determined uplink transmission format, the uplink transmission format including a transport block size (TB size) for user data;
- a transmitter which, in operation, transmits the index to a mobile station;
- and
- a receiver which, in operation, receives the user data and control information, which are coded using the uplink transmission format and which are transmitted together from the mobile station, the control information being one or both of an acknowledgement/negative-acknowledgement (ACK/NACK) and a channel quality indicator (CQI),
- wherein a code rate of the user data for the TB size of the uplink transmission format indicated by the index is adjusted depending on whether the user data is transmitted from the mobile station together with the CQI, with the ACK/NACK, or with both of the CQI and ACK/NACK as the control information.
A radio transmission method comprising:
- determining an uplink transmission format and selecting an index corresponding to the determined uplink transmission format, the uplink transmission format including a transport block size (TB size) for user data;
- transmitting the index to a mobile station;
- and
- receiving the user data and control information, which are coded using the uplink transmission format and which are transmitted together from the mobile station, the control information being one or both of an acknowledgement/negative-acknowledgement (ACK/NACK) and a channel quality indicator (CQI),
- wherein a code rate of the user data for the TB size of the uplink transmission format indicated by the index is adjusted depending on whether the user data is transmitted from the mobile station together with the CQI, with the ACK/NACK, or with both of the CQI and ACK/NACK as the control information.
Dependencies are inferred from the claim text.