Improved apparatus and method of providing a mobile...

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/30 (2006.01) H04Q 7/20 (2006.01) H04Q 7/22 (2006.01) H04Q 7/32 (2006.01) H04Q 7/36 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2252012

The present invention provides a mobile radio telephone system (10, 15) and a method of operating it in which the beacon frequency is at least temporarily transmitted in a discontinuous manner. This allows a base transceiver station (2, 4, 6, 16, 20, 22) to make use of the gained time for either transmitting on another frequency or monitoring neighboring radio frequency sources for potential interference. In a particular embodiment of the present invention, the beacon frequency is interrupted by connecting the transmission path to the receiver path within the base transceiver station (2, 4, 6, 16, 20, 22). This may be done by single pole double throw high frequency switches. The interruption may be temporary or may applied permanently. Further, in a system in which all transmissions by the base transceiver stations (2, 4, 6, 16, 20, 22) are synchronized, mobile stations (12) are described which are adapted to measure signal strength depending upon the duty cycle of the beacon frequency.

La présente invention porte sur un système de radiotéléphonie mobile (10, 15) et sur une méthode d'utilisation de ce système dans laquelle le signal de balisage est au moins temporairement transmis de façon discontinue. Ceci permet à une station émettrice-réceptrice de base (2, 4, 6, 16, 20, 22) d'utiliser le temps disponible pour effectuer une émission sur une autre fréquence ou pour surveiller les sources radiofréquence voisines afin de localiser les sources de brouillage éventuelles. Dans une concrétisation particulière de la présente invention, le signal de balisage est interrompu par la connexion des trajets d'émission et de réception dans la station émettrice-réceptrice de base (2, 4, 6, 16, 20, 22). Cette connexion peut être réalisée au moyen d'inverseurs unipolaires haute fréquence. L'interruption peut être temporaire ou permanente. De plus, dans un système où toutes les transmissions par les stations émettrices-réceptrices de base (2, 4, 6, 16, 20, 22) sont synchronisées, des stations mobiles (12) adaptées pour mesurer l'intensité du signal selon le rapport cyclique du signal de balisage sont décrites.

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