System and method to combine power control commands during...

Details System and method to combine power control commands during... System and method to combine power control commands during...

H - Electricity

04

B

H04B 7/005 (2006.01)

Patent

CA 2354701

Mobile stations in communication with several base stations in a cellular CDMA system (as when undergoing soft handoff) do not use the conventional "or of the downs" rule for assessing power control commands from base stations. Mobile stations assess the link quality of the links from the base station. If any base station displays link quality above a predetermined threshold and if that base station is requesting power reduction, power is reduced by a predetermined amount, delta. Otherwise, power is adjusted up or down by an amount less than or equal to delta according to the received power control signals from each base station in conjunction with a weight determined from the signal quality of the link from each base station.

L'invention concerne des stations mobiles communiquant avec plusieurs stations de base dans un système cellulaire à AMRC (lors d'un transfert sans coupure), qui, pour évaluer des commandes de puissance provenant de stations de base, n'utilisent pas la règle consistant à réduire leur puissance si une seule station de base le demande et à l'augmenter seulement si toutes les stations de base le demandent. Les stations mobiles évaluent la qualité des liaisons à partir de la station de base. Si une station de base présente une qualité de liaison supérieure à un seuil prédéterminé et que cette station de base demande une réduction de puissance, sa puissance est réduite selon une quantité prédéterminée delta. Sinon, sa puissance est augmentée ou diminuée selon une quantité inférieure ou égale à delta en fonction des signaux de commande de puissance reçus de chaque station de base et d'une pondération déterminée à partir de la qualité du signal de la liaison provenant de chaque station de base.

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