Mobile communication system

G - Physics – 01 – S

Patent

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Details

G01S 5/06 (2006.01) H04Q 7/20 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2264790

A mobile communication system wherein a mobile station measures the distances between the mobile station and a plurality of adjacent radio base stations each from a time difference, eliminated by a fixed time difference, between the top time position of a time-divided CDMA burst signal received from a radio base station and the top time position of a time-divided CDMA burst signal transmitted to the radio base station in response to an instruction from the radio base station so that the top of the time-divided CDMA burst signal may come to the top time position of a time slot, and utilizes a result of the measurement for a hand-over discrimination, and frame synchronization between the radio base stations is established with a high degree of accuracy so that a plurality of radio base stations may operate in a same frame synchronization condition.

Ce système de communication mobile est fait de telle manière que les distances séparant une station mobile de plusieurs stations radio fixes sont mesurées à l'aide du décalage dans le temps excluant un décalage dans le temps fixe entre les positions temporelles des fronts avant de signaux de rafale AMCR de division dans le temps envoyés par les stations fixes et reçus par la station mobile et les positions temporelles des fronts avant de signaux de rafale AMCR de division dans le temps envoyés aux stations fixes, de sorte que les fronts avant peuvent parvenir à la position temporelle du front avant d'un créneau temporel en accord avec des instructions provenant des stations fixes. Les résultats mesurés sont utilisés aux fins de la discrimination de transfert. En outre, dans le cadre de cette invention, les stations fixes sont conçues pour fonctionner dans la même synchronisation de trame par établissement d'une synchronisation de trame entre stations fixes dotées d'un degré d'exactitude élevé.

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