METHOD FOR CHANGING MODULATION SCHEME AND BASE STATION APPARATUS USING SAID METHOD
First Claim
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1. A base station apparatus, comprising:
- a communication unit configured to communicate with a terminal apparatus;
a first acquiring unit configured to acquire first information related to the quality of signal received by the communication unit;
a second acquiring unit configured to acquire second information related to the change frequency of modulation scheme or the occurrence frequency of data retransmission between the base station apparatus and the terminal apparatus in a predetermined period of time;
a third acquiring unit configured to acquire third information related to the moving status of the terminal apparatus; and
a selector configured to select a modulation scheme used in a communication between the base station apparatus and the terminal apparatus, based on at least one of the first information, the second information and the third information.
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Abstract
An EVM measurement unit measures the EVM of received signals, and performs a weighted average on them so as to derive MSE. A frequency acquiring unit acquires the change frequency of modulation scheme and the occurrence frequency of data retransmission. A moving status acquiring unit acquires the variation situation in moving velocity of a terminal apparatus or positional relationship between a base station apparatus and the terminal apparatus. A threshold modifying unit determines the modulation scheme used for the next communication, based on the value of MSE and other pieces of information described above.
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5 Claims
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1. A base station apparatus, comprising:
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a communication unit configured to communicate with a terminal apparatus; a first acquiring unit configured to acquire first information related to the quality of signal received by the communication unit; a second acquiring unit configured to acquire second information related to the change frequency of modulation scheme or the occurrence frequency of data retransmission between the base station apparatus and the terminal apparatus in a predetermined period of time; a third acquiring unit configured to acquire third information related to the moving status of the terminal apparatus; and a selector configured to select a modulation scheme used in a communication between the base station apparatus and the terminal apparatus, based on at least one of the first information, the second information and the third information. - View Dependent Claims (2, 3, 4, 5)
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Specification