A signal-comparison based location-determining method

G - Physics – 01 – S

Patent

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G01S 5/14 (2006.01) H04W 64/00 (2009.01)

Patent

CA 2677882

At least one portable RF communications device in conjunction with at least two fixed- location service-area antenna stations respectively capable of RF communication with the at least one device performs the steps of: (I) using a portable device at a selected location to measure RF communications signals from the plurality of local fixed-location service-area antenna stations and electronically storing at least two of the respective reception signal strength measurements; and (II) monitoring a portable device location by causing the device to measure reception signal strength associated with local fixed-location service-area antenna stations signals, and to electronically compare these measurements with the stored at least two measurements.

La présente invention concerne au moins un dispositif de communication RF portable en conjonction avec au moins respectivement deux stations d'antenne de zone de service d'emplacement fixées et capables de communication RF avec au moins un dispositif. Cette invention réalise les étapes de : (I) utilisation d'un dispositif portable à un emplacement sélectionné pour mesurer les signaux de communication RF depuis la pluralité de stations d'antenne locales de zone de service d'emplacement fixées et stockant électroniquement au moins deux des mesures d'intensité de signal de réception respectif ; et (II) surveillance d'un emplacement du dispositif portable en provoquant la mesure de l'intensité du signal de réception associé aux signaux des stations d'antenne de zone de service d'emplacement fixé par le dispositif de mesure, et comparaison électronique de ces mesures avec au moins les deux mesures stockées.

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