| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain sufficient effects with a small calculation amount in transmission power control in cooperation between a plurality of base stations in a cellular system. Ž<P>SOLUTION: Propagation loss between a plurality of base stations and terminals existing in the cell of each of the base stations and noise power of each of the terminals are estimated (S1), a system of simultaneous equations using the transmission power of each base station as a variable is established, assuming that SINR (signal-interference ratio) of each terminal is the same as the required transmission quality, and solutions of the equations are obtained (S2). It is determined whether the solutions meet the restriction conditions of the powers of the base stations or not (S3), and if not, the terminal having the largest sum of interference quantities from each base station or the terminal having the lowest signal level from the own base station is excluded (S6), and a system of simultaneous equations is established again (S2). The above processing is repeated until the solutions meet the restriction conditions (S3) or no terminal is excluded (S5). If the solutions meet the restriction conditions, the solution is assigned as the transmission power of each base station (S4). Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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