H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 9/34 (2006.01) B60R 25/00 (2006.01) B60R 25/10 (2006.01) G07C 9/00 (2006.01) G08B 25/10 (2006.01) G08C 17/02 (2006.01) G08C 19/00 (2006.01) G08C 19/16 (2006.01) G08C 19/28 (2006.01) H04B 1/69 (2006.01)
Patent
CA 2220833
A system for monitoring and controlling an area comprising a controller (35) for controlling system operational functions; at least one remote-control transmitter (25) for transmitting system commands to the controller in a code word having a fixed word and a hopping word therein; the fixed word comprising at least one fixed data bit and the hopping word comprising at least one changing data bit, wherein the hopping word changes its binary value from transmission to transmission of the system commands; and, means for scrambling bits of the fixed word and bits of the hopping word within the code word.
L'invention porte sur un système de surveillance et de contrôle d'une zone comprenant: un gestionnaire des fonctions du système; au moins une télécommande (25) transmettant les instructions au gestionnaire dans un mot de code comportant un mot fixe et un mot de saut, le mot fixe incluant au moins un bit de données fixe et le mot de saut modifiant sa composante binaire d'une émission de commandes du système à l'autre; et des moyens de brouillage des bits du mot fixe et de ceux du mot de saut du mot de code.
Birchfield Jerry
Issa Darrell E.
Dimock Stratton Llp
Directed Electronics Inc.
Issa Darrell E.
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