Method and system of analyzing a plurality of cells in a cellular telecommunication network

15) A method of analyzing a plurality of cells of a cellular telecommunication network, the plurality of cells providing telecommunication services to a service area and being set with one or more cell configuration parameters enabling a cell rating for mobile stations in the service area, the method comprising:

• selecting one or more cells among the plurality of cells;
• changing at least one cell configuration parameter of at least one of the plurality of cells during a first intervention period in order to make the selected cells the least rated cells for the mobile stations in the service area;
• monitoring traffic events communicated using the selected cells during the first intervention period;
• monitoring traffic events communicated using the plurality of cells during the first intervention period so as to determine a total amount of traffic events communicated using the plurality of cells during the first intervention period;
• determining a required effective radio coverage contribution of said selected cells as a ratio between the amount of traffic events communicated using the selected cells and the total amount of traffic events communicated using the plurality of cells during the first intervention period;
• changing at least one cell configuration parameter of at least one of the plurality of cells during a second intervention period in order to make the selected cells the most rated cells for the mobile stations in the service area;
• monitoring traffic events communicated using the selected cells during the second intervention period:
• monitoring traffic events communicated using the plurality of cells during the second intervention period so as to determine a total amount of traffic events communicated using the plurality of cells during the second intervention period;
• determining an effective radio coverage contribution of said selected cells as a ratio between the amount of traffic events communicated using the selected cells and the total amount of traffic events communicated using the plurality of cells during the second intervention period;
• and
• estimating an overlap between the selected cells and the other cells of the plurality of cells based on the required effective radio coverage contribution and the effective radio coverage contribution of the selected cells.

24) A system for obtaining information on radio coverage contribution of one or more selected cells among a plurality of cells of a cellular telecommunication network, the plurality of cells providing telecommunication services to a service area and being set with one or more cell configuration parameters enabling a cell rating for mobile stations in the service area, said system comprising:

• a cell configuration manager configured to change at least one cell configuration parameters of at least one of the plurality of cells during an intervention period in order to affect a rate of the selected cells in the cell rating for the mobile stations in the service area;
• a network performance monitor configured to monitor traffic events communicated using the selected cells during the intervention period;
• and
• a computing platform configured to determine the radio coverage contribution information by correlating the monitored traffic events and the change of parameters.