Inter-cell call hand-over in radio communication systems...

H - Electricity – 04 – B

Patent

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Details

H04B 7/24 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2031551

The call hand-over technique of this invention is characterized by the use of channel information from both the target base station and subscriber terminal in determining which radio traffic channel will be used to hand over a call in progress from a serving bass station to a target base station. Calls are handed over to the radio channel which, of a set of channels under consideration by the subscriber terminal, contains the least amount of interference as measured by the subscriber terminal. The set of channels under consideration by the subscriber terminal is a subset of the entire set of channels allocated to the service. This subset is comprised of those channels having little interference, as measured by the target base station. The hand-over technique thereby assures that calls proceed on channels containing little interference from the viewpoints of both the target base station and subscriber terminal.

La technique de transfert d'appels de cette invention est caractérisée par l'utilisation de renseignements sur les canaux de la station de base visée et du terminal d'abonné pour déterminer quel canal de trafic radio sera utilisé pour transférer un appel en cours de la station de base de desserte à la station de base visée. Les appels sont transférés sur le canal radio qui, parmi un ensemble de canaux étudiés par un terminal d'abonné, contient le plus faible brouillage tel que mesuré par le terminal d'abonné. L'ensemble de canaux étudiés par le terminal d'abonné constitue un sous-ensemble de tout l'ensemble des canaux assignés au service. Ce sous-ensemble est formé des canaux qui ont peu de brouillage, tel que mesuré par la station de base visée. La technique de transfert d'appels fait en sorte que les appels sont traités sur les canaux contenant peu de brouillage du point de vue de la station de base visée et du terminal d'abonné.

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