Patent ID: 6987973

Claim:
Method for determination of the minimum distances between channels of pre-selected mobile telephony network cells, characterised by comprising of the steps: defining at least two specific Z i distances, to which a specific signal power delta value is then assigned; taking a series of measurements (P i ) along a pre-defined measurement routes located within area of the cells of pre-selected base stations, and recording for each of these measurements (P i ): a) reference numbers of the channels carrying the signals received, b) power of the signal within each channel and base station IDs, c) geographic co-ordinates of a point where the measurement is taken; registering for each cell average peak traffic and average daily traffic; registering for each pair of cells average peak- and daily number of calls handed over from cell 1 to cell 2 and vice versa; determining for each P i measurement a sector, where a distance between any point therein and the point of the P i measurement is shorter than a distance between such point and the point of other P i measurement; determining a W i weight of each P i measurement, equal to the area of each such sector; assigning each P i measurement to a particular S i serving cell, selecting that with the most powerful signal as received in a given location; calculating for each P i (S) measurement assigned to a pre-selected S serving cell a difference between the signal power from the S cell and the power of each of the other signals received from other cells, referred to as K i (S) cells; computing for each of the defined Z i distances SUM SK (Z i ) sums of the W i (S) weights for all types of those P i (S) measurements, for which the calculated power difference is smaller than the signal power delta assigned to the specific Z i distance; calculating for each of the K i (S) cells a q SK (Z i ) ratio of interference with a pre-selected S i serving cell, equal to the quotient of SUM SK (Z i ) and the total W i (S) weights for all P i (S) measurements applicable to this same S i serving cell; calculating, for each K i (S) analysed cell, a value of the following formula: (α*T T (S)+βT B (S)+δ*H T (S)+γ*H B (S))*q SK (Z i ) where α, β, δ i γ represent non-negative ratios selected by the system operator, T T (S) represents the average daily traffic in the S i cell, T B (S) represents the average peak traffic in the serving cell, H T (S) represents the daily average number of calls, handed over between the S and K(S) cells, and H B (S) stands for the peak average number of such handed over calls; and assigning for each K i (S) cell a minimum distance between a channel in such K i (S) and a channel in the pre-selected S serving cell, equal to the largest Z i distance for which the value of the above formula is smaller than, or equals one.