Method and vehicle-to-X communication system for selectively checking data security sequences of received vehicle-to-X messages
First Claim
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1. A method for selectively checking data security sequences of received vehicle-to-X messages, the vehicle-to-X messages being messages containing information that is sent to a vehicle from another road user or an infrastructure facility, the method comprising the steps of:
- receiving or sending a number of the vehicle-to-X messages in an operating cycle of a vehicle-to-X communication system, wherein at least one of the vehicle-to-X messages comprises a data security sequence,checking the data security sequence during the operating cycle by performing a reliability assessment of the at least one of the vehicle-to-X messages received,reading during the operating cycle an information content of the received vehicle-to-X message without prior checking of the data security sequence,selecting during the operating cycle a subset of a number of the received vehicle-to-X messages on the basis of the information contents,correcting during the operating cycle the selection of the subset of the number of vehicle-to-X messages selected on the basis of the information content is greater than or less than the available checking capacity,checking solely the data security sequences of selected vehicle-to-X messages; and
wherein the selection on the basis of the information contents takes into account at least two of the following factors;
an actual speed of a recipient,a relative speed of the recipient with respect to a sender,an activation status of a driver assistance system or a comfort system,a distance between the recipient and sender,an estimated time of entry of the sender into a critical zone around the recipient wherein the critical zone has an adaptable extent and outline,an estimated time of intersection of the trajectories of motion of the sender and the recipient,an estimated time of the recipient colliding with the sender,an orientation of the recipient with respect to the sender,a time stamp of a vehicle to X message,a relative direction of travel of the recipient with respect to the sender, anda road classification is made according to one or more of a permitted maximum speed, a lane width, a separation of lanes, a number of lanes, a proximity to built-up areas, and weather conditions.
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Abstract
A method for selectively checking data security sequences of received vehicle-to-X messages, in which a number of the vehicle-to-X messages are received and/or sent in an operating cycle of a vehicle-to-X communication system. In an operating cycle, a reliability assessment of the received vehicle-to-X message is performed by checking the data security sequence, an information content of the received messages is read without prior checking of the data security sequence. In the operating cycle, a subset of the number of received vehicle-to-X messages is selected on the basis of the information contents, and solely the data security sequences of selected vehicle-to-X messages are checked. This results in the advantage that a reliability assessment is no longer carried out on all the received vehicle-to-X messages before they are processed, thereby enabling a reduction in the checking capacity that must be reserved for checking the data security sequence.
21 Citations
14 Claims
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1. A method for selectively checking data security sequences of received vehicle-to-X messages, the vehicle-to-X messages being messages containing information that is sent to a vehicle from another road user or an infrastructure facility, the method comprising the steps of:
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receiving or sending a number of the vehicle-to-X messages in an operating cycle of a vehicle-to-X communication system, wherein at least one of the vehicle-to-X messages comprises a data security sequence, checking the data security sequence during the operating cycle by performing a reliability assessment of the at least one of the vehicle-to-X messages received, reading during the operating cycle an information content of the received vehicle-to-X message without prior checking of the data security sequence, selecting during the operating cycle a subset of a number of the received vehicle-to-X messages on the basis of the information contents, correcting during the operating cycle the selection of the subset of the number of vehicle-to-X messages selected on the basis of the information content is greater than or less than the available checking capacity, checking solely the data security sequences of selected vehicle-to-X messages; and wherein the selection on the basis of the information contents takes into account at least two of the following factors; an actual speed of a recipient, a relative speed of the recipient with respect to a sender, an activation status of a driver assistance system or a comfort system, a distance between the recipient and sender, an estimated time of entry of the sender into a critical zone around the recipient wherein the critical zone has an adaptable extent and outline, an estimated time of intersection of the trajectories of motion of the sender and the recipient, an estimated time of the recipient colliding with the sender, an orientation of the recipient with respect to the sender, a time stamp of a vehicle to X message, a relative direction of travel of the recipient with respect to the sender, and a road classification is made according to one or more of a permitted maximum speed, a lane width, a separation of lanes, a number of lanes, a proximity to built-up areas, and weather conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle-to-X communication system for selectively checking data security sequences of received vehicle-to-X messages, the vehicle-to-X messages being messages containing information that is sent to a vehicle from another road user or an infrastructure facility, comprising,
a sending module configured to send the vehicle-to-X messages, wherein the vehicle-to-X messages each form a data security sequence, a receiving module configured to receive the vehicle-to-X messages, a readout module configured to read information contents of the received vehicle-to-X messages without prior checking of the data security sequence during an operating cycle, and a checking module configured to check during the operating cycle a reliability assessment of the received vehicle-to-X messages by checking the one data security sequence in each of the messages, a selection module configured to select during the operating cycle a subset of the number of the received vehicle-to-X messages on the basis of the information contents, a selection correction module configured to correct during the operating cycle the selection of the subset of the number of vehicle-to-X messages selected on the basis of the information content is greater than or less than the available checking capacity, the checking module configured to check solely the data security sequences of selected vehicle-to-X messages, and wherein the selection module on the basis of the information contents is configured to take into account at least two of the following factors: -
an actual speed of a recipient, a relative speed of the recipient with respect to a sender, an activation status of a driver assistance r system or a comfort system, a distance between the recipient and sender, an estimated time of entry of the sender into a critical zone around the recipient wherein the critical zone has an adaptable extent and outline, an estimated time of intersection of the trajectories of motion of the sender and the recipient, an estimated time of the recipient colliding with the sender, a time stamp of a vehicle to X message, an orientation of the recipient with respect to the sender, a relative direction of travel of the recipient with respect to the sender, and a road classification is made according to one or more of a permitted maximum speed, a lane width, a separation of lanes, a number of lanes, a proximity to built-up areas, and weather conditions. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification
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Current AssigneeContinental Teves AG & Co. OHG (Continental AG)
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Original AssigneeContinental Teves AG & Co. OHG (Continental AG)
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InventorsSthlin, Ulrich
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Primary Examiner(s)SHOLEMAN, ABU S
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Application NumberUS14/008,268Publication NumberTime in Patent Office1,735 DaysField of Search726/22, 726/1, 726/23, 726/26US Class Current1/1CPC Class CodesG06F 21/33 using certificatesG06F 21/606 by securing the transmissio...G08G 1/163 involving continuous checkingH04L 2209/84 VehiclesH04L 63/123 received data contents, e.g...H04L 65/4061 Push-to services, e.g. push...H04L 67/12 specially adapted for propr...H04L 9/3271 using challenge-responseH04W 12/106 Packet or message integrityH04W 4/44 for communication between v...
