Subband power allocation for tightly coordinated cellular systems

Transmission power allocation scheme for soft frequency reuse (SFR) is proposed in tightly coordinated cells where neighboring cells are controlled by a central scheduler. Also fast adaptive SFR scheme is proposed. While SFR is the effective technique to increase cell edge user throughput, it costs the degradation of cell average throughput. The cost increases when SFR fails to be fast adaptive in the change of user distribution. The proposed scheme enables coordinated cells to control transmission power adaptively according to user distribution so that it minimizes the loss of cell average throughput introduced from SFR while it guarantees enhancement of cell edge user throughput. Evaluation result are shown for different number of subbands and compared to static SFR.