Mobile equipment based filtering for packet radio service...

H - Electricity – 04 – L

Patent

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H04L 1/20 (2006.01)

Patent

CA 2396725

A method for operating a mobile equipment (ME 10) in a wireless network (12), the method having steps of (A) determining a parameter that is indicative of a signal quality; (B) calculating in the ME an indication of link quality, by means filtering having a filter length that is a function of the determined parameter, such as speed or derivative of the speed of the ME; and (C) reporting the calculated indication of link quality to the wireless network. Preferably the ME speed indication is transmitted in te padding bits of the point-to-point message. The indication of ME speed is used to one of modify or replace a forgetting factor "a" which influences the length of a running average filter that operates on link quality measurement data, such as a mean Bit Error Probability (BEP) or a coefficient of variation of the BEP.

Cette invention concerne une méthode d'utilisation d'un équipement mobile (ME 10) dans un réseau sans fil (12), qui consiste à : (A) déterminer un paramètre qui renseigne sur la qualité du signal (tel que la vitesse du ME); (B) calculer dans le ME une indication de qualité de la liaison (calcul qui fait intervenir une opération de filtrage dont la longueur de filtre est fonction du paramètre déterminé, tel que la vitesse ou une dérivées de la vitesse de ME); et (C) communiquer l'indication calculée de la qualité de la liaison au réseau sans fil. L'indication de vitesse de ME est transmise de préférence dans les bits de remplissage du message point-à-point. Cette indication sert à modifier ou remplacer un facteur d'oubli <= a >= qui a une incidence sur la longueur d'un filtre moyen fonctionnant à partir de données de mesure de la qualité de la liaison, tel qu'une probabilité d'erreur sur les bits (BEP) ou un coefficient de variation de BEP.

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