Process for implementation of a blind handover in an...

H - Electricity – 04 – W

Patent

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Details

H04W 36/32 (2009.01) G01S 5/10 (2006.01)

Patent

CA 2491929

The invention relates to a method for carrying out a blind handover in an intersystem and interfrequency handover in mobile communication systems, whereby a mobile station is supplied by several base stations prior to the handover i.e. it can receive several other base stations in addition to the supplying base station. According to the invention, measurement of the propagation time of the signals received from the base station is carried out by the mobile station on the air interface. The measured propagation times are transmitted to one of the base stations. The location of the mobile station is determined using the transmitted propagation time measuring data by the mobile communication network. With the aid of a data base, at least one suitable base station for an intersystem or interfrequency handover is then selected using the determined location and the data necessary for a handover is transmitted to the mobile station from the selected base station.The mobile station can carry out the handover to the selected base station using said information.

L'invention concerne un procédé pour effectuer un transfert aveugle lors d'un transfert entre systèmes et entre fréquences d'un système de communication mobile. Selon ledit procédé, une station mobile est desservie par plusieurs stations de base, avant le transfert, c'est-à-dire qu'elle peut recevoir des signaux provenant non seulement de la station de base qui la dessert, mais également des signaux provenant de plusieurs autres stations de base. Selon l'invention, la station mobile effectue une mesure du temps de propagation des signaux reçus par les stations de base sur l'interface radio. Ensuite, une détermination de l'emplacement de la station mobile est réalisée, du côté du réseau de communication mobile, sur la base des données de mesures du temps de propagation transmises. Au moins une station de base appropriée pour un transfert entre systèmes ou entre fréquences est sélectionnée, à l'aide d'une base de données, sur la base de l'emplacement déterminé. Les données nécessaires à un transfert, de la station de base sélectionnée sont transmises à la station mobile. Sur la base de ces informations, la station mobile peut effectuer le transfert vers la station de base sélectionnée.

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