System and method of communications with traffic signals
First Claim
1. A system for commanding, configuring, and interrogating a traffic light, comprising:
- at least one integrated light controller adapted to couple to a corresponding said traffic light and operable to operate said corresponding traffic light;
a communication controller coupled to the at least one integrated light controller;
the communication controller enabling command and control of the at least one integrated light controller; and
a communication link having a protocol with a physical layer coupling the communication controller to the at least one integrated light controller.
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Accused Products
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.
73 Citations
31 Claims
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1. A system for commanding, configuring, and interrogating a traffic light, comprising:
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at least one integrated light controller adapted to couple to a corresponding said traffic light and operable to operate said corresponding traffic light;
a communication controller coupled to the at least one integrated light controller;
the communication controller enabling command and control of the at least one integrated light controller; and
a communication link having a protocol with a physical layer coupling the communication controller to the at least one integrated light controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of transmitting and receiving signals between a traffic signal communication controller and a physically remote traffic signal integrated light controller, comprising:
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configuring a data transmission structure having an application layer, a data transport layer and a physical layer; and
communicating the data transmission structure between the traffic signal communication controller and the traffic signal integrated light controller over a communication link. - View Dependent Claims (23, 24, 25, 26)
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27. A method of facilitating communication between a plurality of traffic light integrated light controllers and a corresponding traffic light communication controller, comprising:
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registering at least one of the traffic light integrated light controllers over a communications link; and
brokering responses among multiple said traffic light integrated light controllers according to a registration congestion protocol. - View Dependent Claims (28, 29, 30)
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31. A communication link protocol for on-site field software updates of a traffic light integrated light controller by a traffic light communication controller, comprising:
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notifying at least one of the traffic light integrated light controllers of an update process;
configuring said traffic light integrated light controller to receive the software update;
sending the software update to the traffic light integrated light controller;
certifying and verifying the receipt of the software update at the traffic light integrated light controller;
installing the software update in an electrically-alterable memory of the traffic light integrated light controller; and
transmitting to the communication controller an acknowledgment of successful completion of the software update at the traffic light integrated light controller.
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Specification