Patent ID: 11935406
Assignee: UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
Field: Control (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 3:
4. A traffic signal system, comprising:
a communication unit which transmits and receives messages to and from a vehicle; and
a processor which is connected to the communication unit and processes a message which is transmitted and received to and from the vehicle in different ways in accordance with a driving status of the vehicle which is classified into a departure status and a moving status,
wherein the traffic signal system includes signal lights installed at a plurality of adjacent intersections, and
in the departure status,
when a traffic signal for a traveling direction of the vehicle is changed to a green signal, the communication unit transmits a departure available message to the vehicle,
the communication unit receives the departure status response message and the pilot signal for positioning from the vehicle, and
the processor estimates a position and a moving direction of the vehicle using the pilot signal and the communication unit transmits a vehicle entry message to a signal light of the next intersection.