Method and apparatus for downlink power control in macro...

H - Electricity – 04 – B

Patent

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H04B 7/005 (2006.01)

Patent

CA 2295085

A method and apparatus for controlling an amount of downlink power to be applied in each downlink transmission in a macro diversity radio system. Downlink power level is controlled in response to a quality measurement of a corresponding uplink. In accordance with exemplary embodiments, a path gain or a carrier-to-interference ratio of an uplink is measured at a base station in an active set, and subsequently used to proportionally govern a downlink transmission power level for a corresponding downlink. In such a fashion, each downlink handling a mobile station maintains a desired level of robustness, while avoiding introduction of unnecessary system interference.

L'invention concerne un procédé et un appareil permettant de commander le niveau de puissance de chaque liaison descendante d'un système radio en macro diversité. Le niveau de puissance de la liaison descendante est commandé en réaction à une mesure de qualité d'une liaison montante correspondante. Selon certains modes de réalisations, un gain de voie ou un rapport porteuse/brouillage d'une liaison montante sont mesurés au niveau de la station de base dans un ensemble actif, et ensuite utilisés pour commander proportionnellement un niveau de puissance de transmission pour la liaison descendante correspondante. De cette façon, toutes les liaisons descendantes gérant une station mobile conservent un niveau de solidité élevé tout en évitant les interférences avec d'autres systèmes.

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