Abstract: On-board equipment in a motor vehicle includes a C-V2X communication device receiving a first signal from road side equipment having a known position. The C-V2X communication device transmits a second signal having content that is dependent upon a length of time in which the first signal traveled from the road side equipment to the C-V2X communication device. A GPS device is communicatively coupled to the C-V2X communication device and receives the second signal from the C-V2X communication device. The GPS device estimates a position of the vehicle. The estimating is dependent upon the second signal from the C-V2X communication device.

Abstract: On-board equipment in a motor vehicle includes a C-V2X communication device receiving a first signal from road side equipment having a known position. The C-V2X communication device transmits a second signal having content that is dependent upon a length of time in which the first signal traveled from the road side equipment to the C-V2X communication device. A GPS device is communicatively coupled to the C-V2X communication device and receives the second signal from the C-V2X communication device. The GPS device estimates a position of the vehicle. The estimating is dependent upon the second signal from the C-V2X communication device.

Abstract: On-board equipment for a motor vehicle includes a DSRC radio receiving a signal from road side equipment. The signal has an accurate frequency in accordance with GPS time. A GPS receiver is communicatively coupled to the DSRC radio. The on-board equipment determines the GPS accurate time and provides the GPS accurate time to the GPS receiver. The determining of the GPS accurate time is dependent upon the accurate frequency in the signal.

Abstract: On-board equipment for a motor vehicle includes a DSRC radio receiving a signal from road side equipment. The signal has an accurate frequency in accordance with GPS time. A GPS receiver is communicatively coupled to the DSRC radio. The on-board equipment determines the GPS accurate time and provides the GPS accurate time to the GPS receiver. The determining of the GPS accurate time is dependent upon the accurate frequency in the signal.

Abstract: A dedicated short range communications (DSRC) unit includes a DSRC radio communicatively coupled to each of a first radio frequency transmitter and a second radio frequency transmitter. The DSRC radio sends a first radio signal to the first radio frequency transmitter such that the first radio frequency transmitter transmits the first radio signal. The DSRC radio sends a second radio signal to the second radio frequency transmitter such that the second radio frequency transmitter transmits the second radio signal. The DSRC radio produces a control signal that causes only one of the first radio frequency transmitter and the second radio frequency transmitter to transmit its respective radio signal at any point in time.

Abstract: On-board equipment for a motor vehicle includes a DSRC radio receiving a signal from road side equipment. The signal has an accurate frequency in accordance with GPS time. A GPS receiver is communicatively coupled to the DSRC radio. The on-board equipment determines the error in the GPS receiver clock or time and provides the GPS receiver with the time error. The determining of the GPS receiver time error is dependent upon the accurate frequency in the air-borne RSE signal. The GPS time error or compensation is dependent upon the GPS accurate time.

Abstract: On-board equipment for a motor vehicle includes a DSRC radio receiving a signal from road side equipment. The signal has an accurate frequency in accordance with GPS time. A GPS receiver is communicatively coupled to the DSRC radio. The on-board equipment determines the error in the GPS receiver clock or time and provides the GPS receiver with the time error. The determining of the GPS receiver time error is dependent upon the accurate frequency in the air-borne RSE signal. The GPS time error or compensation is dependent upon the GPS accurate time.

Abstract: On board equipment in a motor vehicle includes a DSRC radio receiving a calculated GPS position error from road side equipment. The calculated GPS position error is based upon a difference between a known position of the road side equipment and a position estimated by a first GPS receiver within the road side equipment. A second GPS receiver is communicatively coupled to the DSRC radio and estimates a position of the vehicle. The second GPS receiver adjusts the estimation of the vehicle position based upon the calculated GPS position error.