Patent ID: 6892073

Claim:
A method of creating constraint matrices to be used in planning a cellular wireless telephone circuit whereby, when there is a given number of predetermined carrier frequencies (f i , f j ) to be allocated to a plurality of base radio stations having specific transmission powers with a service zone in order to manage a corresponding plurality of radio cells acting as server or interfering cells, comprising the following steps: according to the positions of each mesh of a server cell, causing a computing system to work out a prediction of the field strength C received in this mesh of the service zone at one (f i ) of the predetermined server cell frequencies, for each of these meshes, causing the computing system to calculate the field strength I of the interfering field generated by each of the cells other than the cell which is deemed to be the cell interfering with the cell in turn deemed to be the server cell by the computing system, for each of these meshes, causing the computing system to calculate the ratio C/I at the “server” cell, where I is the strength of the interference field generated by each of the other interference cells of the service zone and wherein the strength I of the interference field received in the mesh exceeds a given “MINI_INTERFERENCE_FIELD” value stored by the computing system, by integrating over the full service zone, causing the computing system to ascertain the global interference rate tb ij caused by the interference cells in the server cell, these values thereupon being displayed or stored in a so-called initial constraints matrix by displaying or storing field strengths (Ki, Li, Mi) at the intersections of the rows designating server cells and the columns designating interfering cells, based on this so-called “initial” constraints matrix, the system determines initialization probabilities of service that represent the probability a given cell shall be the server cell feeding the highest field strength to the cellular phone, the probability of service being inferred from the gap between the predicted field strength and the modifiable value of the “MINI_FIELD” strength stored in a file “Frequencies.txt”.