# US 12,003,513 B2 · Vehicle-to-X communication arrangement and method for receiving vehicle-to-X messages > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,513 B2 - Document ID: US12003513B2 - Status: Granted - Kind: B2 - Application number: 16/690,176 - Filed: 2019-11-21 - Published: 2020-05-21 - Granted: 2024-06-04 - Earliest claimed: 2018-11-21 - Applicants: Continental Teves AG & Co. OHG - Inventors: Jürgen Kunz; Marc Menzel; Felix Hagenmeyer - Web page: https://patentgrep.com/patent/US12003513B2 ## CPC - H04L 63/123: {received data contents, e.g. message integrity} - H04L 9/3247: {involving digital signatures} - H04L 63/1425: {Traffic logging, e.g. anomaly detection} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 12/106: Packet or message integrity - H04L 2209/84: Vehicles - H04W 84/005: {Moving wireless networks} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A vehicle-to-X communication arrangement has a decision unit and a vehicle-to-X communication module, wherein the vehicle-to-X communication module forwards vehicle-to-X messages together with a signature to the decision unit which performs a safety check using the respective signature. ## Claims ### Claim 1 A vehicle-to-X communication arrangement comprising: a vehicle-to-X communication device that has a functional-safety level below Automotive Safety Integrity Level B (ASIL B) and that is configured to receive vehicle-to-X messages having a respective signature and to forward said messages in an unmodified condition including the signature; a control module of a motor vehicle, wherein the control module performs driving-assistance functions in compliance with at least the ASIL B functional-safety level, and the control module is configured to receive the forwarded vehicle-to-X messages and to perform a safety check with each forwarded message based on each forwarded message's respective signature; wherein the vehicle-to-X communication device comprises: a PHY/MAC layer, a network layer, and a security layer; wherein the control module of the motor vehicle comprises: a facility layer and an application layer; wherein the control module of the motor vehicle and the vehicle-to-X communication device are connected to each other by a vehicle bus in order to exchange data and are each configured to independently execute a respective signature verification of a vehicle-to-X message by decrypting a hash value that is contained in the signature with a public key that is also contained in the signature, calculating a hash value from the vehicle-to-X message, and determining whether the decrypted hash value is identical to the calculated hash value in order to ensure that the control module of the motor vehicle performs driving-assistance functions in compliance with at least the ASIL B functional-safety standard, while the vehicle-to-X communication module complies with a functional-safety standard lower than the ASIL B. ### Claim 2 (depends on 1) The vehicle-to-X communication arrangement according to claim 1, wherein the vehicle-to-X communication device is configured to output received vehicle-to-X messages in an unmodified condition as new vehicle-to- X messages and to execute at least one of multihopping functions and store-and- forward functions. ### Claim 3 (depends on 1) The vehicle-to-X communication arrangement according to claim 1, further comprising an antenna which is connected to the vehicle-to-X communication device. ### Claim 4 (depends on 1) The vehicle-to-X communication arrangement according to claim 1, wherein the vehicle-to-X communication device is configured to perform at least one of: a security check, a certificate check and a plausibility check. ### Claim 5 A method for receiving vehicle-to-X messages comprising: receiving, by a vehicle-to-X communication device that has a functional-safety level below Automotive Safety integrity, Level B (ASIL B), respective vehicle-to-X message together with the associated signature in a vehicle-to-X communication module; forwarding, by the vehicle-to-X communication device and via a vehicle bus, the vehicle-to-X message in an unmodified format with the associated signature to a control module of a motor vehicle, wherein the control module performs driving-assistance functions in compliance with at least the ASIL B functional-safety level; executing of a safety check for each forwarded vehicle-to-X message based on the respective signature by the control module of the motor vehicle; wherein the vehicle-to-X communication module comprises: a PHY/MAC layer, a network layer, and a security layer; wherein the control module of the motor vehicle comprises: a facility layer and an application layer; executing a signature verification of a vehicle-to-X message with the control module of the motor vehicle and the vehicle-to-X communication module independently from one another by decrypting a hash value that is contained in the signature with a public key that is also contained in the signature, calculating a hash value from the vehicle-to-X message, and determining whether the decrypted hash value is identical to the calculated hash value in order to ensure that the control module of the motor vehicle performs driving- assistance functions in compliance with at least the ASIL B functional-safety standard, while the vehicle-to-X communication module complies with a functional- safety standard lower than the ASIL B. ### Claim 6 (depends on 5) The method according to claim 5, further comprising: outputting received vehicle-to-X messages in an unmodified condition from the vehicle-to-X communication module as new vehicle-to-X messages; and executing at least one of multihopping functions and store-and-forward functions. ### Claim 7 (depends on 5) The method according to claim 5, wherein an antenna is connected to the vehicle-to-X communication module. ### Claim 8 (depends on 5) The method according to claim 5, further comprising performing at least one of: a security check, a certificate check and a plausibility check with the vehicle-to-X communication module.