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Patentes

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Número de publicaciónWO2006088472 A1
Tipo de publicaciónSolicitud
Número de solicitudPCT/US2005/014188
Fecha de publicación24 Ago 2006
Fecha de presentación25 Abr 2005
Fecha de prioridad11 Feb 2005
También publicado comoCA2595365A1, CA2595365C, CN101112107A, CN101112107B, EP1847132A1, EP1847132A4
Número de publicaciónPCT/2005/14188, PCT/US/2005/014188, PCT/US/2005/14188, PCT/US/5/014188, PCT/US/5/14188, PCT/US2005/014188, PCT/US2005/14188, PCT/US2005014188, PCT/US200514188, PCT/US5/014188, PCT/US5/14188, PCT/US5014188, PCT/US514188, WO 2006/088472 A1, WO 2006088472 A1, WO 2006088472A1, WO-A1-2006088472, WO2006/088472A1, WO2006088472 A1, WO2006088472A1
InventoresRobert J. Anderson, Joseph W. Sheehan, Jeffrey F. Bull, Benjamin Herman Cohen
SolicitanteTrueposition, Inc.
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos:  Patentscope, Espacenet
Synchronisation de station e/r de base
WO 2006088472 A1
Resumen
La présente invention concerne, dans un dispositif de radiolocalisation par chevauchement de réseaux pour un réseau de communications GSM ou UMTS, la possibilité d'utiliser de façon bien plus efficace le spectre par une synchronisation des stations de base, ce qui peut nécessiter une répartition d'un signal de synchronisation à toutes les stations de base, ou l'installation d'un module de synchronisation satellitaire sur chaque site. L'invention propose donc une architecture dans laquelle des modules de mesure pour localisation ou 'LMU' (Location Management Units) sont installées sur certains au moins des sites de stations de base de façon à localiser les dispositifs radio. Les LMU servent à mesurer par diverses techniques de localisation la temporisation de certains signaux remontants et/ou descendants dans le réseau cellulaire. Ces LMU peuvent comporter un module de référence de synchronisation à base de GPS, pouvant servir à synchroniser les bases de temps de tous les LMU. Pour réduire le coût d'ensemble de la synchronisation des stations de base, le LMU distribue des signaux de synchronisation, comprenant une impulsion électrique périodique ainsi qu'une information de description de synchronisation, par une interface série ou autre, disponible pour que d'autre noeuds puissent l'utiliser aux fins de synchronisation. Le format de l'impulsion électrique et de l'information de description de synchronisation est modifié par le logiciel et le matériel de façon à s'adapter au divers formats demandés par les différents types de stations de base. Ainsi, les stations de base à LMU en co-situation peuvent recevoir un signal de synchronisation sans grande exigence matérielle. L'interface externe ou 'EIU' (External Interface Unit) de l'invention permet également de s'adapter aux divers formats matériels des stations de base. Pour les sites de stations de base non équipés de LMU, on peut utiliser un module de chronométrage ou 'TMU' (Timing Measurement Unit). Ce module sert uniquement à fournir à la station de base des signaux de synchronisation dans les mêmes formats que ceux fournis par les LMU. Les signaux de chronométrie fournis par les TMU sont synchrone avec les signaux fournis par les LMU. Un tel TMU uniquement chronomètre coûte moins cher que le LMU parce qu'il est dégagé des fonctions de mesure du signal remontant ou descendant. Cette logique de fonctionnement permet à l'opérateur cellulaire de synchroniser les stations de base à un coût relativement faible.
Descripción  disponible en inglés
Reclamaciones  disponible en inglés
Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
WO2001055803A226 Ene 20012 Ago 2001Telefonaktiebolaget Lm Ericsson (Publ)Synchronisation temporelle d'un reseau radio
JP2004023350A Título no disponible
US20040092275 *3 Jul 200313 May 2004Norman KrasnerMethods and apparatuses for using mobile GPS receivers to synchronize basestations in cellular networks
US20040203865 *2 Jul 200214 Oct 2004Krasner Norman F.Methods and apparatuses for measuring frequencies of basestations in cellular networks using mobile GPS receivers
Otras citas
Referencia
1See also references of EP1847132A1
Citada por
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WO2009099809A3 *27 Ene 200910 Dic 2009Qualcomm IncorporatedSynchronisation de réseau sans fil
EP2356480A1 *19 Nov 200917 Ago 2011Andrew LLCSystème et procédé de localisation par estimation de multiples distances
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US821340515 Ene 20093 Jul 2012Qualcomm IncorporatedWireless network synchronization
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Clasificaciones
Clasificación internacionalH04Q7/20
Clasificación cooperativaH04B7/2684, H04B7/2693
Clasificación europeaH04B7/26V6D4, H04B7/26V6D6D
Eventos legales
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