H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 7/08 (2006.01) G01S 5/06 (2006.01) G01S 5/14 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2288094
Emergency call handling may, in the near future, require terminal unit location information to be provided to emergency service centers. Exemplary embodiments of the present invention provide improved techniques for using a system of monitoring or adjunct stations to provide this location information to the emergency service centers. For example, either time of arrival (TOA) or time difference of arrival (TDOA) techniques can be selectively used to process received signals and provide location information. Techniques for improving timing estimates are also disclosed.
Dans un proche avenir, le traitement des appels d'urgence peut nécessiter la fourniture, aux centres de services d'urgence, des données relatives à la localisation du terminal appelant. Les modes de réalisation cités en exemple reposent sur des techniques améliorées qui permettent d'utiliser un système de contrôle des stations adjointes, de manière à fournir les données de localisation aux centres de services d'urgence. Ainsi, on peut utiliser tour à tour les techniques liées au temps d'arrivée (TOA) ou à la différence entre les temps d'arrivée (TDOA), afin de traiter les signaux reçus et de fournir les données de localisation. L'invention concerne aussi des techniques visant à améliorer les évaluations de temps.
Koilpillai R. David
Koorapaty Havish
Molnar Karl
Raith Alex K.
Ramesh Rajaram
Ericsson Inc.
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