To further increase the spectrum efficiency of cellular mobile communication systems, it is important to control co-channel interference among cells. To control co-channel interference and improve spectrum efficiency over the whole cell, we proposed QoS-guaranteed multi-cell coordinated transmit power control, which limits the communication of some users and fully guarantees the QoS for the remaining users. On the other hand, to further increase the spectrum efficiency, it is also important to address the deterioration of communication quality at the cell edge. As one of the techniques for improving the communication quality at the cell edge, we have studied adjacent base station cooperative transmission in which simultaneously transmits signals from both own base station and adjacent base station to the cell-edge mobile terminal. In this paper, we propose a novel scheme that combines the adjacent base station cooperative transmission with the our proposed QoS- guaranteed multi-cell coordinated transmit power control in order to increase not only cell capacity but also cell edge capacity at the same time; its impact on overall performance was clarified.
展开▼
