Radio transmission device and transmission rate decision method
First Claim
1. A radio transmission apparatus that determines a transmission rate in transmitting data, based on a CQI (Channel Quality Indicator) transmitted from a communication apparatus that is a transmission destination of the data, comprising:
- a receiver that receives a signal including the CQI transmitted from the communication apparatus;
a corrector that corrects the CQI included in the signal, based on likelihood of the signal including the CQI; and
a transmission rate determiner that determines a transmission rate in transmitting data to the communication apparatus, based on the corrected CQI.
2 Assignments
0 Petitions
Accused Products
Abstract
A base station apparatus (radio transmission apparatus) transmits a radio signal of data to a mobile terminal apparatus (communication apparatus of a transmission destination). The mobile terminal apparatus receiving the radio signal determines (ST1010) information (CQI) on a downlink transmission rate enabling reception in the mobile terminal apparatus based on reception quality such as CIR to transmit to the base station apparatus. The base station apparatus extracts a CQI value from the received radio signal, while obtaining likelihood of received data (ST1020), and corrects the CQI value based on the likelihood (ST1030). Then, based on the corrected CQI value, the base station apparatus determines a downlink transmission rate (ST1040). By this means, even when the radio transmission apparatus erroneously receives the transmission rate request transmitted from the communication apparatus of the transmission destination, the communication apparatus is prevented from erroneously receiving the data transmitted from the radio transmission apparatus.
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Citations
15 Claims
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1. A radio transmission apparatus that determines a transmission rate in transmitting data, based on a CQI (Channel Quality Indicator) transmitted from a communication apparatus that is a transmission destination of the data, comprising:
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a receiver that receives a signal including the CQI transmitted from the communication apparatus;
a corrector that corrects the CQI included in the signal, based on likelihood of the signal including the CQI; and
a transmission rate determiner that determines a transmission rate in transmitting data to the communication apparatus, based on the corrected CQI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transmission rate determining method for determining a transmission rate in transmitting a radio signal of data based on a CQI transmitted from a radio communication apparatus that is a transmission destination of the data, comprising:
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a reception step of receiving a signal including the CQI transmitted from the radio communication apparatus;
a correcting step of correcting the CQI included in the signal based on likelihood of the signal including the CQI; and
a transmission rate determining step of determining a transmission rate in transmitting a radio signal of data to the radio communication apparatus, based on the corrected CQI.
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15. A transmission rate determining program for determining a transmission rate in transmitting a radio signal of data based on a CQI transmitted from a radio communication apparatus that is a transmission destination of the data, the program making a computer execute:
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a reception step of receiving a signal including the CQI transmitted from the radio communication apparatus;
a correcting step of correcting the CQI included in the signal based on likelihood of the signal including the CQI; and
a transmission rate determining step of determining a transmission rate in transmitting a radio signal of data to the radio communication apparatus, based on the corrected CQI.
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Specification