System and method of communications with traffic signals
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United States of America Patent
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Issued Date -
Feb 23, 2006
app pub date -
Aug 18, 2004
filing date -
Aug 18, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention comprises a system and method for communicating with a traffic signal by which at least one communication controller and integrated light controller are coupled by a high frequency ('HF') coupler to a power line for transmission. In each of the directions of communication, specific transmission methods and data protocols are used over the communication link. The communication link protocol used for communication between the integrated light controller and the communication controller provides a robust method for framing data within a message structure that provides byte-by-byte synchronization and message integrity through a parity check per byte, and a checksum calculation.
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