Data boundary aware base station assisted position location...

H - Electricity – 04 – W

Patent

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Details

H04W 88/02 (2009.01) H04W 4/02 (2009.01) G01S 5/14 (2006.01) H04B 1/16 (2006.01) H04B 7/185 (2006.01)

Patent

CA 2342987

The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. A method for performing position location on a subscriber unit in a terrestrial wireless telephone system using a set of satellites each transmitting a signal, the terrestrial wireless telephone system having base stations (12), including the steps of transmitting an aiding message from the base station (12) to the subscriber unit, said aiding message containing information regarding a data boundary for each signal from the set of satellites, applying correlation codes to each signal yielding corresponding correlation data and accumulating said correlation data over a first interval preceding a corresponding data boundary yielding a first accumulation result, and a second interval following said corresponding data boundary yielding a second accumulation result.

La présente invention est un procédé et un appareil nouveaux et améliorés de localisation de position dans un système de communication sans fil. Le procédé exécute une localisation de position sur une unité d'abonné dans un système téléphonique sans fil terrestre utilisant un ensemble de satellites transmettant chacun un signal, le système téléphonique terrestre sans fil ayant des stations de base (12), et comprend les étapes consistant à transmettre un message d'aide de la station de base (12) à l'unité d'abonné, ledit message d'aide contenant des informations relatives à la limite des données pour chaque signal provenant de l'ensemble de satellites, à appliquer des codes de corrélation à chaque signal produisant des données de corrélation correspondantes et à accumuler lesdites données de corrélation sur un premier intervalle précédant une limite de données correspondante produisant un premier résultat d'accumulation, et un second intervalle suivant la limite de données correspondante produisant un second résultat d'accumulation.

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