| 摘要 |
PROBLEM TO BE SOLVED: To remove inter-cell interference, and to prevent decrease of spectrum efficiency by transmitting the same communication information in the same synchronizing state as the same sub-carrier group by base stations for the cluster of two or more cells, transmitting a multiple access preamble by each frame, and identifying the transmitting base station. SOLUTION: Base stations BS1, BS2, and BS3 handle each cell 1, 2, and 3 classified into one cluster. The cluster can surround all cells in a system or only a small group. All base stations in the cluster use the same sub-carrier group for a common communication channel, and transmit the same signal synchronizing with the sub-carriers along the cluster of the base stations BS1-BS3. A mobile station to which the communication information is transmitted is indicated by frame addressing. A preamble confirms the base station which transmits the communication information to the mobile station, and the level of the signal intensity. |
