RELATIVE VEHICULAR POSITIONING USING VEHICULAR COMMUNICATIONS
First Claim
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1. A method for determining the position of a first moving vehicle relative to a second moving vehicle in a vehicular environment, comprising the steps of:
- in the first moving vehicle;
a) receiving each of a plurality of IEEE 802.11 standard based communications from the second moving vehicle, each said receiving including receiving a packet with packet data, from the second moving vehicle, that includes an absolute position and an absolute speed vector of said scond moving vehicle; and
b) determining the position of the first moving vehicle relative to the second moving vehicle based on information including IEEE 802.11 standard based communications received from only the second moving vehicle, -by steps including;
i) computing a preliminary relative position of the first moving vehicle relative to the second moving vehicle according to said absolute position and said absolute speed vector of said second moving vehicle, andii) correcting said preliminary relative position in accordance with said receiving of said plurality of IEEE 802.11 standard based communications.
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Abstract
The relative position of one vehicle vs. another vehicle, both driving in a vehicular environment, is determined using vehicular communications based on the IEEE 802.11 standard. The relative position determination is performed in a measuring vehicle using data provided by a measured vehicle through IEEE 802.11 communications carried through beacons as well as GPS or other location data and local map information
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Citations
17 Claims
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1. A method for determining the position of a first moving vehicle relative to a second moving vehicle in a vehicular environment, comprising the steps of:
- in the first moving vehicle;
a) receiving each of a plurality of IEEE 802.11 standard based communications from the second moving vehicle, each said receiving including receiving a packet with packet data, from the second moving vehicle, that includes an absolute position and an absolute speed vector of said scond moving vehicle; and b) determining the position of the first moving vehicle relative to the second moving vehicle based on information including IEEE 802.11 standard based communications received from only the second moving vehicle, -by steps including; i) computing a preliminary relative position of the first moving vehicle relative to the second moving vehicle according to said absolute position and said absolute speed vector of said second moving vehicle, and ii) correcting said preliminary relative position in accordance with said receiving of said plurality of IEEE 802.11 standard based communications. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- in the first moving vehicle;
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9. A method for determining the position of a first moving vehicle relative to a second moving vehicle in a vehicular environment, comprising the steps of:
- in the first moving vehicle;
a) receiving a plurality of packets of IEEE 802.11 packet data from the second moving vehicle, said packet data including absolute position and speed vector data of the second moving vehicle; and b) processing the packet data of only the packets received from the second moving vehicle together with absolute position and speed vector data of the first moving vehicle to determine the position of the second moving vehicle relative to the first moving vehicle, by steps including; i) computing a preliminary relative position of the first moving vehicle relative to the second moving vehicle according to said absolute position and speed vector data of the moving vehicles, and ii) correcting said preliminary relative position in accordance with said receiving of said plurality of packets of IEEE 802.11 packet data. - View Dependent Claims (10, 11, 12, 13, 14)
- in the first moving vehicle;
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15. A system for determining the position of a measuring moving vehicle relative to a measured moving vehicle in a vehicular environment, comprising a vehicular 802.11 communications and processing unit installed in the measuring moving vehicle, the communications and processing unit including a short-preamble autocorrelation module used for a LOS/NLOS indication, the communications and processing unit used for receiving a plurality of packets of IEEE 802.11 packet data, from the measured moving vehicle, said packet data including absolute position and speed vector data of the measured moving vehicle, for processing the packet data of only the packets received from the measured moving vehicle together with absolute position and speed vector data of the measuring moving vehicle to determine the position of the measured moving vehicle relative to the measuring moving vehicle, said processing including:
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i) computing a preliminary relative position of the measuring moving vehicle relative to the measured moving vehicle according to said absolute position and speed data of the moving vehicles, and ii) correcting said preliminary relative position in accordance with the receiving of said plurality of packets of IEEE 802.11 packet data. - View Dependent Claims (16, 17)
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Specification