Patent ID: 8010161
Filing Date: 2011-08-30
Classification: H04L,H04W

Abstract:
1. A radio base station for performing communication through three or more frequency bands based on orthogonal frequency division multiplexing, comprising: a transmission unit configured to transmit a first channel through at least one of the three or more frequency bands and to transmit a second channel having smaller power than the first channel through at least another one of the three or more frequency bands, the first channel and the second channel being transmittable concurrently in time; a reception condition detecting unit configured to detect a reception condition of one or more mobile stations residing within a local cell; and a scheduling unit configured to select one of the first channel and the second channel, a modulation scheme, and a transmission power to be used for at least a downlink to one of the mobile stations based on the detected reception condition, wherein a transmission power of the first channel is highest among all channels using the three or more frequency bands, and a frequency band of the highest channel transmission power for transmitting the first channel is selected from the three or more frequency bands and fixedly allocated to the local cell, such that the selected frequency band is different from a frequency band of a highest channel transmission power allocated to any one of a plurality of adjacent cells, and wherein a transmission power of the second channel does not exceed a predetermined interference power value tolerable to an adjacent cell.