Forward and reverse link power control using position and...

H - Electricity – 04 – B

Patent

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Details

H04B 7/005 (2006.01) H04B 7/26 (2006.01) H04Q 7/30 (2006.01)

Patent

CA 2352775

A method and apparatus for dynamically adjusting a power control loop that attempts to maintain either the transmit power of a signal sent from a base station to a mobile station or the signal to noise ratio of a signal sent from the mobile station (300) to the base station (400) above a minimum threshold and below a maximum threshold. Location information that is representative of the distance and morphology between the mobile station (300) and the base station (400) and the velocity of the mobile station (300) are determined. The minimum and the maximum thresholds of the power control loop are then adjusted in accordance with the location and the mobility information such that the minimum and the maximum threshold vary as the distance and the morphology between the mobile station (300) and the base station (400) and the velocity of the mobile station (300) change. In addition, the step size used to increase or decrease the transmit signal power, is adjusted in accordance with the velocity of the mobile station (300). A transmitter sends the signal at a power level that is controlled by the power control loop with the adjusted minimum threshold.

La présente invention concerne un procédé et un appareil permettant l'ajustement dynamique d'une boucle de réglage de puissance ayant pour fonction de maintenir, soit la puissance d'émission d'un signal envoyé par une station de base à une station mobile, soit le rapport signal-bruit d'un signal envoyé par la station mobile (300) à la station de base (400) au-dessus d'un seuil minimal et en-dessous d'un seuil maximal. Les données de position représentatives de la distance et de la morphologie entre la station mobile (300) et la station de base (400) et la vitesse de la station mobile (300) sont déterminées. Les seuils minimal et maximal de la boucle de réglage de puissance sont alors ajustés en fonction des données de position et de mobilité de manière que les seuils minimal et maximal varient à mesure que la distance et la morphologie entre la station mobile (300) et la station de base (400) et la vitesse de la station mobile (300) varient. De plus, la mesure utilisée pour augmenter ou réduire la puissance du signal d'émission est ajustée en fonction de la vitesse de la station mobile (300). Un émetteur envoie le signal à un niveau de puissance commandé par la boucle de réglage de puissance en fonction du seuil minimal ajusté.

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