Method and apparatus for providing location services for a...

Details Method and apparatus for providing location services for a... Method and apparatus for providing location services for a...

H - Electricity

04

W

H04W 4/22 (2009.01) H04W 64/00 (2009.01) G01S 5/02 (2006.01) G01S 5/06 (2006.01)

Patent

CA 2677692

A method and system for providing E911 services for a distributed antenna system uses a lookup table including round trip delay (RTD) ranges for a number of nodes of the distributed antenna system to determine a serving node for an E911 call. The method and system disclosed herein, may calculate such lookup table based on the values of the fiber delays and air delays for each node on the distributed antenna system. After determining the serving node for an E911 call, the system may use triangulation method to determine the exact location of the wireless unit generating the E911 call.

L'invention concerne un procédé et un système assurant des services E911 dans un système d'antennes distribuées, qui utilisent une table de conversion incluant des plages de temps de propagation en boucle (RTD) pour plusieurs nAEuds du système d'antennes distribuées afin de déterminer un nAEud de desserte correspondant à un appel E911. Le procédé et le système selon l'invention peuvent calculer cette table de conversion en prenant comme base les valeurs des temps de propagation de fibre et des temps de propagation dans l'air pour chaque nAEud du système d'antennes distribuées. Après avoir déterminé le nAEud de desserte d'un appel E911, le système peut utiliser un procédé de triangulation pour déterminer l'emplacement exact de l'unité sans fil qui est à l'origine de l'appel.

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