| 摘要 |
<p>A base-station apparatus (100) measures frequency variation and time variation of a channel, based on a signal received from a mobile machine (10). Then, based on the measured frequency variation and time variation, the base-station apparatus allocates (100) either a sub-channel consisting of contiguous subcarriers or consisting of non-contiguous subcarriers sub-channel to the mobile machine (10). With this, the base-station apparatus (100) allocates a sub-channel according to the wireless propagation environment where the mobile machine (10) is located.
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