| 摘要 |
In the cellular mobile telephone network of the invention, at least one carrier of the frequency group of a cell is transmitted at a lower power than the highest allowed transmission power of the base station, the radio coverage of the lower-power carrier thus establishing a sub-cell (1) within the mother cell S1. When a mobile station is located within the sub-cell (1), it is allocated a traffic channel the frequency of which is the frequency of the lower carrier, and when a mobile station is located outside (2) the sub-cell but within the moter cell, it is allocated a traffic channel the frequency of which is the frequency of a high-power carrier. As the mobile station moves into a sub-cell or correspondingly out of it, a handover is performed in which the mobile station is allocated a traffic channel which uses a lower-power or, correspondingly, a higher-power carrier. The frequency reuse factor can thus be reduced as regards the lower-power carriers. |
