Transmission power control device and method, mobile...

H - Electricity – 04 – W

Patent

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Details

H04W 52/24 (2009.01) H04B 7/005 (2006.01)

Patent

CA 2423261

A transmission power control device is provided that includes: a transmission loss calculator that calculates a transmission loss in the electric wave transmission path between a mobile station and each base station; and a transmission power control information determiner that determines which transmission power control information is to be used in a transmission power control operation at the mobile station, based on transmission power control information transmitted from each base station to the mobile station and the transmission loss in the transmission path between the mobile station and each base station calculated by the transmission loss calculator. This transmission power control device may further include an autonomous controller that increases transmission power from a current value in accordance with predetermined characteristics, regardless of transmission power control information from another communication device, when reception signal quality has become lower than a predetermined quality level. With this structure, after synchronization with a signal from the base station is established at the mobile station, the transmission power is controlled to increase from the initial value in accordance with the predetermined characteristics, regardless of the transmission power control information transmitted from the base station.

L'invention concerne un dispositif pour commande de puissance d'émission, qui comprend une unité de calcul d'affaiblissement de propagation sur trajet de propagation d'onde radioélectrique entre une station mobile et différentes stations de base rattachées. L'information de commande de puissance d'émission à utiliser par rapport à une station mobile est déterminée en fonction de l'information de commande de puissance d'émission émanant d'une station de base, recueillie à la station mobile, et de l'affaiblissement de propagation sur trajet, entre les différentes stations de base et la station mobile. Lorsque la qualité du signal de réception apparaît comme inférieure à un seuil de qualité préétabli, une procédure de commande autonome fait en sorte que la puissance d'émission augmente selon une caractéristique prédéterminée, indépendamment de l'information de commande de puissance d'émission émanant d'un autre dispositif de communication. Après l'établissement de synchronisation dans une station mobile, concernant un signal de station de base, la commande de puissance d'émission s'effectue à partir d'une valeur initiale selon une caractéristique prédéterminée, indépendamment de l'information de commande de puissance d'émission émanant de la station de base.

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