Traffic preemption system signal validation method

G - Physics – 08 – G

Patent

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G08G 1/07 (2006.01) G08G 1/04 (2006.01) G08G 1/087 (2006.01) G08G 1/095 (2006.01)

Patent

CA 2610398

A secure optical-communication traffic-preemption system and method is provided that securely communicates an identification code from an optical emitter to a traffic location. The optical emitter transmits light pulses that represent an encrypted code that is an encryption using a time-varying encryption key of at least an identification code. An optical detector situated at a traffic location receives the transmitted light pulses. Validation, including decryption using a time-varying decryption key, is attempted for the encrypted identification code represented within the received light pulses. In response to validating the included identification code, a traffic-preemption command is generated for a traffic light at the traffic location.

L'invention concerne un système et un procédé de préemption de circulation à communications optiques sécurisées permettant de communiquer de manière sécurisée un code d'identification d'un émetteur optique à un lieu de circulation. L'émetteur optique émet des impulsions lumineuses qui représentent un code crypté qui constitue un cryptage, au moyen d'une clé de cryptage variant dans le temps d'au moins un code d'identification. Un détecteur optique situé sur un lieu de circulation reçoit les impulsions lumineuses transmises. Une validation, comprenant un décryptage au moyen d'une clé de décryptage variant dans le temps, est essayée pour le code d'identification crypté représenté dans les impulsions lumineuses reçues. En réponse à la validation du code d'identification inclus, une commande de préemption de circulation est générée pour un feu de circulation sur le lieu de circulation.

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