Apparatus and method for non-regular channel assignment in...

H - Electricity – 04 – B

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H04B 7/204 (2006.01) H04B 7/26 (2006.01) H04Q 7/36 (2006.01)

Patent

CA 2093975

A channel assignment system assigns channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best assignment of the former to the latter. The objective is the maximization of traffic handling capacity which, given the multitude of cells, is expressed as the maximization of a bottleneck capacity ratio. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies assigned to the cell over the number of radio frequencies needed to meet blocking probability requirements. The solution to attain an optimal non-regular channel assignment is decomposed into two mathematical programs designated a Master Program and a Subprogram. These are solved iteratively with assistance from a channel set augmentation technique impelmented between solutions of the Master and Subprogram.

L'invention est un système d'affectation qui affecte des canaux à diverses cellules en optimisant la partition des fréquences radio disponibles en ensembles sans chevauchement, le groupement des cellules à utilisateurs multiples et l'affectation de ces ensembles à ces cellules. L'objectif est de maximiser la capacité à prendre en charge le trafic, objectif qui, étant donné la multitude des cellules, se traduit par la maximisation du rapport de capacité. Par définition, le rapport de capacité d'une cellule est le rapport du nombre des fréquences radio affectées à cette cellule au nombre de fréquences radio nécessaires pour satisfaire aux besoins compte tenu de la probabilité de blocage. La solution pour optimiser une affectation non régulière des canaux est décomposée en deux programmes mathématiques, un programme maître et un sous-programme. Ceux-ci sont soumis à un traitement itératif à l'aide d'une méthode d'élargissement de l'ensemble de canaux qui est sollicitée entre le traitement du programme maître et celui du sous-programme.

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