System and method for intercepting cellular satellite...

H - Electricity – 04 – B

Patent

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H04B 7/185 (2006.01)

Patent

CA 2605506

The present invention provides a method for intercepting and monitoring of cellular satellite communication wherein communication between at least one mobile device (MES) and the satellite is through a first band link that includes plurality of first-band spot beams each accommodating at least one basic channel unit that includes a control channel and corresponding traffic channels, and communication between the satellite and main station is through wideband second-band link accommodating plurality of second band spot beams each accommodating at least one basic channel unit that includes a control channel and corresponding traffic channels, the method comprising detecting map between a control channel of the downlink first band link and corresponding control channel of downlink second band link by identifying identical unique spot beam number (SB Mask) data in the respective control channels.

L~invention concerne un procédé d~interception et de surveillance de communications cellulaires par satellite, en vertu duquel les communications entre au moins un dispositif mobile (MES) et le satellite s~effectuent par une liaison à première bande comportant une pluralité de faisceaux ponctuels de première bande contenant chacun au moins une unité de canal élémentaire constituée d~un canal de commande et de canaux de trafic correspondants, et les communications entre le satellite et la station principale s~effectuent par une liaison à deuxième bande large comportant une pluralité de faisceaux ponctuels de deuxième bande contenant chacun au moins une unité de canal élémentaire constituée d~un canal de commande et de canaux de trafic correspondants, le procédé comprenant la détection d~une application entre un canal de commande de la liaison descendante à première bande et le canal de commande correspondant de la liaison descendante à deuxième bande par identification de données de numéro de faisceau ponctuel unique (masque SB) identiques dans les canaux de commande respectifs.

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