| 摘要 |
A frequency carrier allocating method is provided which can effectively utilize frequency carriers when the traffic of the uplink is asymmetric to that of the downlink in the FDD cellular system. Plural frequency carriers are arranged in each of two frequency bands FB1 and FB2. Base stations are divided into two groups BSG1 and BSG2. In the group BSG1, frequency carriers in the frequency band FB1 are allocated to the downlink of a base station while frequency carriers in the frequency band FB2 are allocated to the uplink thereof. In the group BSG2, frequency carriers in the frequency band FB2 are allocated to the downlink of a base station while frequency carriers in the frequency band FB1 are allocated to the uplink thereof. Bi-directional communication is performed between the base station and a mobile station using the frequency of the frequency carrier.
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