Locating mobile units in a cellular telephone system via...

H - Electricity – 04 – Q

Patent

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H04Q 7/22 (2006.01) H04Q 7/36 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2153970

A method and system for identifying the location of mobile units (20) within a cellular telephone system (10). A subset of cells is dynamically assigned to a mobile unit based upon the cell location of the mobile unit at the time of registration. The mobile unit records the subset information, and as long as the mobile unit remains in one of the cells in the subset, it does not re- register its location with the system. The system is able to locate the mobile unit within the assigned subset of cells. When the mobile unit enters a new cell that is not within the subset of cells, it re-registers with the system which then assigns a new subset of cells corresponding to its location within a new cell that did not belong to the previous subset.

L'invention concerne un procédé et un système pour identifier l'emplacement d'unités mobiles (20) dans un système de téléphone cellulaire (10). Un sous-ensemble de cellules est attribué dynamiquement à une unité mobile sur la base de l'emplacement cellulaire de l'unité mobile au moment de l'enregistrement. L'unité mobile enregistre l'information du sous-ensemble et aussi longtemps que l'unité mobile reste dans une des cellules du sous-ensemble, sa position n'est pas enregistrée à nouveau par le système. Le système est capable de localiser l'unité mobile dans le sous-ensemble de cellules attribuées. Lorsque l'unité mobile entre dans une nouvelle cellule qui n'est pas dans le sous-ensemble de cellules, elle est enregistrée à nouveau par le système qui attribue alors un nouveau sous-ensemble de cellules correspondant à son emplacement dans une nouvelle cellule qui n'appartenait pas au sous-ensemble précédent.

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