Radio network designing apparatus and method

A radio network designing method for designing a radio network that covers a plurality of cells through ratio waves from base stations, the method causing a computer to execute the steps of:

• setting up an optimizing condition that at least includes an objective function that has a radio parameter of said base station as the objective function parameter and that is used for an optimization process to balance traffic loads between a plurality of cells, by using cell balance values between a target cell whose characteristic changes by modification of the parameter and multiple neighboring cells existing around the target cell;
• and
• performing an optimization process in accordance with said set optimizing condition to determine the value of said parameter to be the solution,
• wherein said objective function shows a degradation ratio of an important area and a constraint condition in which satisfying a predetermined relationship with a target value means better balance between the cells, as said optimizing condition;
• the degradation ratio in the important area being lower than that in the other areas, and wherein said optimization process is performed so as to reduce the value of said objective function by modifying said parameter within a range in which said constraint condition satisfies said predetermined relationship with said target value, and wherein said constraint condition is the cell balance values between said target cell and neighboring cells.

A non-transitory computer-readable medium containing a radio network designing program for enabling a computer to design a radio network that covers a plurality of cells through ratio waves from base stations, said non-transitory computer-readable medium causing the computer to:

• set up an optimizing condition that at least includes an objective function that has a radio parameter of said base station as the objective function parameter and that is used for an optimization process to balance traffic loads between a plurality of cells, by using cell balance values between a target cell whose characteristic changes by modification of the parameter and multiple neighboring cells existing around the target cell;
• and
• perform an optimization process in accordance with said set optimizing condition to determine the value of said parameter to be the solution,
• wherein said objective function shows a degradation ratio of an important area and a constraint condition in which satisfying a predetermined relationship with a target value means better balance between the cells, as said optimizing condition;
• the degradation ratio in the important area being lower than that in the other areas, and wherein said optimization process is performed so as to reduce the value of said objective function by modifying said parameter within a range in which said constraint condition satisfies said predetermined relationship with said target value, and
• wherein said constraint condition is the cell balance values between said target cell and neighboring cells.

A radio network designing apparatus for designing a radio network that covers a plurality of cells through ratio waves from base stations, comprising:

• objective function extracting means for setting up an optimizing condition that at least includes an objective function that has a radio parameter of said base station as the objective function parameter and that is used for an optimization process to balance traffic loads between a plurality of cells, by using cell balance values between a target cell whose characteristic changes by modification of the parameter and multiple neighboring cells existing around the target cell;
• and
• optimizing means for performing an optimization process in accordance with said optimizing condition set by said objective function extracting means to determine the value of said parameter to be the solution,
• wherein said objective function extracting means sets up an objective function showing a degradation ratio of an important area and a constraint condition in which satisfying a predetermined relationship with a target value means better balance between the cells, as said optimizing condition;
• the degradation ratio in the important area being lower than that in the other areas, and wherein said optimizing means performs optimization so as to reduce the value of said objective function by modifying said parameter within a range in which said constraint condition satisfies said predetermined relationship with said target value, and
• wherein said constraint condition is the cell balance values between said target cell and neighboring cells.