System and method to communicate time stamped, 3-axis...

Details System and method to communicate time stamped, 3-axis... System and method to communicate time stamped, 3-axis...

H - Electricity

04

Q

H04Q 9/00 (2006.01) G01S 5/00 (2006.01)

Patent

CA 2260762

A remote communications apparatus (10) such as a cell telephone is equipped with a satellite position system SPS receiver (26) to acquire location data. The location data is encoded using multiple audio frequency tone encoding (48) such as DTMF for transmission over the voice channel (70) of the telecommunications network (12), including cell CTSS (134) and the PSTN (138) to a call receiver apparatus (14) such as a public safety answering point (PSAP). Location data correction is effected using a fixed antenna (1402) receiving apparatus (1404) and related database (1412), in the network (210) or at the answering point (166) to improve location accuracy. The invention provides advantages of low cost of implmentation, improved location accuracy, and transparent signaling of location data so that simultaneous voice communication is uninterrupted.

L'invention porte sur un appareil de télécommunications (10) tel qu'un téléphone cellulaire muni d'un récepteur (26) de positionnement SPN donnant des informations de position. Lesdites informations sont codées par codage par tonalités audio multifréquences (48) tel que le DTMF pour permettre des transmissions sur le canal vocal (70) du réseau (12) de télécommunications (comportant des cellules CTSS (134) et le RPTC (138)) avec un récepteur (14) tel qu'un point de réponse de la sûreté publique. On corrige les données de localisation à l'aide d'un appareil récepteur (1404) à antenne fixe (1402) et de la base de données correspondante (1412) du réseau (210) ou du point de réponse (166) pour améliorer la précision de positionnement. L'invention offre les avantages d'un faible coût d'installation, d'un point plus précis, et d'une signalisation transparente des données de position permettant de maintenir des communications vocales simultanées.

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