A control method, comprising: determining, by a baseband unit, BBU, when the BBU determines that network quality of a first cell of multiple cells within coverage of the BBU decreases, load information of the first cell; and combining a remote radio unit, RRU, of the first cell with an RRU of a second cell within coverage of the BBU to obtain a combined cell; characterized by when load of the first cell is less than or equal to a first load threshold, determining, according to signal strength of RRUs, the second cell, being the cell having the strongest signal interference to the first cell, of neighboring cells of the first cell; wherein the signal strength of all the RRUs is specifically obtained from multiple measurement reports reported by a mobile terminal, wherein the multiple measurement reports comprise measurement reports reported by multiple mobile terminals during signal measurement; and the determining a second cell, having the strongest signal interference to the first cell, of neighboring cells of the first cell comprises: calculating a ratio of signal strength of the first cell to signal strength of each neighboring cell of the first cell in each measurement report, wherein signal strength of a cell in each measurement report is a sum of signal strength of all RRUs belonging to the same cell in the measurement report; accumulating a ratio of the signal strength of the first cell to signal strength of a same neighboring cell in each measurement report to obtain a sum, and using the sum as strength of signal interference between the first cell and the neighboring cell; and determining, according to strength of signal interference between the first cell and each neighboring cell, the second cell having the strongest signal interference to the first cell. determining, by a baseband unit, BBU, when the BBU determines that network quality of a first cell of multiple cells within coverage of the BBU decreases, load information of the first cell; and combining a remote radio unit, RRU, of the first cell with an RRU of a second cell within coverage of the BBU to obtain a combined cell; characterized by when load of the first cell is less than or equal to a first load threshold, determining, according to signal strength of RRUs, the second cell, being the cell having the strongest signal interference to the first cell, of neighboring cells of the first cell; wherein the signal strength of all the RRUs is specifically obtained from multiple measurement reports reported by a mobile terminal, wherein the multiple measurement reports comprise measurement reports reported by multiple mobile terminals during signal measurement; and the determining a second cell, having the strongest signal interference to the first cell, of neighboring cells of the first cell comprises: calculating a ratio of signal strength of the first cell to signal strength of each neighboring cell of the first cell in each measurement report, wherein signal strength of a cell in each measurement report is a sum of signal strength of all RRUs belonging to the same cell in the measurement report; accumulating a ratio of the signal strength of the first cell to signal strength of a same neighboring cell in each measurement report to obtain a sum, and using the sum as strength of signal interference between the first cell and the neighboring cell; and determining, according to strength of signal interference between the first cell and each neighboring cell, the second cell having the strongest signal interference to the first cell. calculating a ratio of signal strength of the first cell to signal strength of each neighboring cell of the first cell in each measurement report, wherein signal strength of a cell in each measurement report is a sum of signal strength of all RRUs belonging to the same cell in the measurement report; accumulating a ratio of the signal strength of the first cell to signal strength of a same neighboring cell in each measurement report to obtain a sum, and using the sum as strength of signal interference between the first cell and the neighboring cell; and determining, according to strength of signal interference between the first cell and each neighboring cell, the second cell having the strongest signal interference to the first cell.