DEDICATED SHORT RANGE COMMUNICATION (DSRC) SENDER VALIDATION USING GPS PRECISE POSITIONING TECHNIQUES
First Claim
1. A communications system comprising:
- a sending sub-system receiving GPS signals, said sending sub-system generating a message to be sent that includes a data portion and a raw GPS measurement portion, said raw GPS measurement portion including at least part of the data received in the GPS signals and said data portion including a calculation of the sending sub-system'"'"'s position using the GPS signals, said sending sub-system transmitting the message; and
a receiving sub-system that receives the message from the sending sub-system, said receiving sub-system using the raw GPS measurements in the message to determine the position of the sending sub-system and comparing the determined position of the sending sub-system with the calculated position in the data portion of the message to determine whether a match exists to determine the validity of the message.
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Accused Products
Abstract
A system and method for authenticating a message transmitted in a vehicle-to-vehicle communications system. The sending vehicle will attach raw GPS data to a transmitted message it receives from GPS satellites that the sending vehicle uses to determine its own position. The transmitted message will also include the position of the sending vehicle that the sending vehicle has determined using the GPS data. The receiving vehicle will use the raw GPS data in the message and an RTK process to determine the position of the sending vehicle. The receiving vehicle will compare the position of the sending vehicle in the message with the position of the sending vehicle determined from the GPS data, and if they match, will authenticate the received message.
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Citations
16 Claims
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1. A communications system comprising:
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a sending sub-system receiving GPS signals, said sending sub-system generating a message to be sent that includes a data portion and a raw GPS measurement portion, said raw GPS measurement portion including at least part of the data received in the GPS signals and said data portion including a calculation of the sending sub-system'"'"'s position using the GPS signals, said sending sub-system transmitting the message; and a receiving sub-system that receives the message from the sending sub-system, said receiving sub-system using the raw GPS measurements in the message to determine the position of the sending sub-system and comparing the determined position of the sending sub-system with the calculated position in the data portion of the message to determine whether a match exists to determine the validity of the message. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communications system for transmitting messages between vehicles, said system comprising:
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a sending sub-system on a sending vehicle receiving GPS signals, said sending sub-system generating a message to be sent that includes a data portion and a raw GPS measurement portion, said raw GPS measurement portion including at least part of the data received in the GPS signals and said data portion including a calculation of the sending sub-system'"'"'s position using the GPS signals, said sending sub-system transmitting the message; and a receiving sub-system on a receiving vehicle that receives the message from the sending sub-system, said receiving sub-system including a GPS real-time kinematics engine that uses a real-time kinematic (RTK) process to determine the position of the sending sub-system using the raw GPS measurements in the message, said receiving sub-system including an RTK-based security manager that compares the calculated position of the sending sub-system in the data portion of the message with the determined position of the sending sub-system to determine the validity of the message. - View Dependent Claims (9, 10, 11)
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- 12. A communications system for transmitting messages between vehicles, said system comprising a sending sub-system on a sending vehicle receiving GPS signals, said sending sub-system generating a message to be sent that includes a data portion and a raw GPS measurement portion, said raw GPS measurement portion including at least part of the data received in the GPS signals.
Specification