Communications: electrical – Traffic control indicator
Reexamination Certificate
2007-12-11
2007-12-11
La, Anh V. (Department: 2612)
Communications: electrical
Traffic control indicator
C340S906000, C340S924000, C701S117000
Reexamination Certificate
active
11142013
ABSTRACT:
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.
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Global Traffic Technologies, LLC
La Anh V.
Schwegman Lundberg & Woessner, P.A.
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