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DE-102024210746-A1 - Method and apparatus for a tire pressure monitoring system

DE102024210746A1DE 102024210746 A1DE102024210746 A1DE 102024210746A1DE-102024210746-A1

Abstract

Method, for example a computer-implemented method, for a wheel unit attachable to a wheel of a vehicle for a tire pressure monitoring system for the vehicle, wherein the tire pressure monitoring system comprises at least the wheel unit and a vehicle unit that is in wireless data communication with the wheel unit at least temporarily, comprising: providing an assignment between a number of information elements and respective state information associated with the wheel, exchanging initial information with the vehicle unit via the wireless data connection using the assignment.

Inventors

  • Michael Blessenohl

Assignees

  • Robert Bosch Gesellschaft mit beschränkter Haftung

Dates

Publication Date
20260513
Application Date
20241108

Claims (20)

  1. Method, for example a computer-implemented method, for a wheel unit (12) attachable to a wheel (1a) of a vehicle (1) for a tire pressure monitoring system (10) for the vehicle (1), wherein the tire pressure monitoring system (10) comprises at least the wheel unit (12) and a vehicle unit (14) that is at least temporarily in wireless data communication (DV) with the wheel unit (12), comprising: providing (100) an assignment (Z) between a number (A-IE) of information elements and respective, for example, mechanical, condition information (ZI-1a) associated with the wheel (1a), exchanging (102) initial information (I-1) with the vehicle unit (14) via the wireless data communication (DV) using (102a) the assignment (Z).
  2. Procedure according to Claim 1 , wherein the exchange (102) comprises at least one of the following elements: a) sending (102b) the first information (I-1), or b) receiving (102c) the first information (I-1).
  3. Method according to at least one of the preceding claims, comprising: assigning (110) each of an information element (IE-1, IE-2, IE-3, IE-4) of the number (A-IE) of information elements to a partial value range (ZG-TWB1, ZG-TWB2, ZG-TWB3, ZG-TWB4) of at least one state variable (ZG) associated with the state information (ZI-1a), optionally sending (112) the first information (I-1) to the vehicle unit (14) using at least some of the information elements (IE-1, IE-2, ...) of the number (A-IE) of information elements, optionally receiving (114) the first information (I-1) from the vehicle unit (14) using at least some of the information elements (IE-1, IE-2, ...) of the number (A-IE) of information elements.
  4. Method according to at least one of the preceding claims, wherein the state information (ZI-1a) and/or the state variable (ZG) is associated with at least one of the following elements: a) rotation angle, or b) rotation direction, or c) angular velocity, or d) steering angle, for example relative steering angle, or e) acceleration.
  5. A method according to at least one of the preceding claims, comprising: dividing (115), for example segmenting (115a), a value range (WB) of one or the state variable (ZG) associated with the state information (ZI-1a) into several, for example, equally sized partial value ranges (ZG-TWB1, ZG-TWB2, ...), wherein, for example, the dividing (115) is carried out with reference to a predefinable reference value (ZG-REF) (115b), assigning (117) each of the number (A-IE) of information elements (IE-1, IE-2, ...) to each of the partial value ranges (ZG-TWB1, ZG-TWB2, ...).
  6. A method according to at least one of the preceding claims, wherein the first information (I-1) comprises at least one of the following elements: a) a secret (GEH), for example in the form of a random number or pseudorandom number, or b) a signature (SIG), for example of the secret (GEH), or c) an identification (ID), for example an address, for example a device address, or d) a checksum (CS), or e) redundancy (RED), for example redundant information, for example for error detection and/or error correction, wherein, for example, the secret (GEH) is a random number or the checksum (CS) is a random number. can exhibit or where the secret (GEH) is assigned a checksum (CS).
  7. Procedures according to at least one of the Claims 3 until 6 , comprising: Determining (120) a first information element (IE-1) that can be used to describe at least a first part of the first information (I-1), wherein, for example, the first information element (IE-1) characterizes the first part of the first information (I-1), for example, representing; Determining (122) timestamp information (ZSI-1) that characterizes a time at which the state variable (ZG) has a value that lies within a partial value range (ZG-TWB1) associated with the first information element (IE-1); Transmitting (124) a signal (SIG; SIG') characterizing the timestamp information (ZSI-1) via the wireless data link (DV) to the vehicle unit (14); and, optionally, repeating (126) at least one aspect of determining (120, 122) or transmitting (124) for at least another part of the first information (I-1), for example, repeating (126a) the aspects of ascertaining (120, 122) and transmitting (124) until all the initial information (I-1) has been transmitted.
  8. Procedure according to Claim 7 , wherein the transmission (124) of the signal (SIG) characterizing the timestamp information (ZSI-1) includes at least one of the following elements: a) transmission (124a) of the signal (SIG) without the timestamp information (ZSI-1), for example without explicit timestamp information, wherein, for example, a time of transmission (124a) of the signal (SIG) characterizes the timestamp information (ZSI-1), for example implicitly, for example, transmission (124a') of the signal (SIG) in the sub-value range (ZG-TWB1) associated with the first information element (IE-1), for example in a time range associated with the sub-value range (ZG-TWB1), or b) transmission (124b) of the signal (SIG') with the, for example explicit, timestamp information (ZSI-1), for example not necessarily in the sub-value range (ZG-TWB1) associated with the first information element (IE-1).
  9. Procedure according to Claim 7 or 8 , comprising at least one of the following elements: a) limiting (128) a rate of determining (122) and/or transmitting (124) the timestamp information (ZSI-1), for example to a predefinable measure, for example in the case of a rotation angle as a state variable (ZG) to less than one determination (122) and/or transmission (124) per full revolution of the wheel (1a), or b) avoiding (129) a correlation of a transmission time (124) with a specific orientation of the wheel (1a).
  10. Method according to at least one of the preceding claims, wherein the wireless data connection (DV) comprises at least one of the following elements: a) radio connection, or b) Bluetooth data connection, or c) Bluetooth Low Energy (BLE) data connection, or d) near field communication, for example NFC, or e) other connection for wireless data transmission.
  11. Method, for example a computer-implemented method, for a vehicle unit (14) for a tire pressure monitoring system (10) for a vehicle (1), wherein the tire pressure monitoring system (10) comprises the vehicle unit (14) and at least one wheel unit (12) that is at least temporarily in wireless data connection (DV) with the vehicle unit (14) and can be attached to a wheel (1a) of the vehicle (1), wherein the method comprises: providing (150) an assignment (Z) between a number (A-IE) of information elements and respective state information (ZI-1a) associated with the wheel (1a), using (152) the assignment (Z) for receiving (152a) first information (I-1) from the wheel unit (12) via the wireless data connection (DV) and/or for evaluating (152b) first information (I-1) received from the wheel unit (12).
  12. Procedure according to Claim 11 , wherein each information element (IE-1, IE-2, IE-3, IE-4) of the number (A-IE) of information elements is assigned to a partial value range (ZG-TWB1, ZG-TWB2, ZG-TWB3, ZG-TWB4) of at least one state variable (ZG) associated with the state information (ZI-1 a), wherein the method comprises: receiving (160) a signal (SIG; SIG') characterizing timestamp information (ZSI-1) via the wireless data link (DV) from the wheel unit (12), wherein the timestamp information (ZSI-1) characterizes a time at which the state variable (ZG) has a value that lies within a partial value range (ZG-TWB1) associated with the first information element (IE-1), evaluating (162) the signal (SIG; SIG'), for example the timestamp information (ZSI-1), taking into account information (I-DQ) at least one further data source (DQ) for state information (ZI-1a) associated with the wheel (1a), wherein, for example, the evaluation (162) comprises a determination (162a) of at least one information element (IE-1) of the number (A-IE) of information elements (IE-1, IE-2, IE-3, IE-4) based on the timestamp information (ZSI-1) of the signal (SIG; SIG') and the information (I-DQ) of the at least one further data source (DQ).
  13. Device (200; 200') for a tire pressure monitoring system (10) for a vehicle (1), wherein the tire pressure monitoring system (10) comprising a wheel unit (12) attachable to a wheel (1a) of the vehicle (1) and a vehicle unit (14), wherein, for example, the device (200; 200') is provided for the wheel unit (12) and/or for the vehicle unit (14), wherein the device (200; 200') is configured to carry out the method according to at least one of the preceding claims.
  14. Product (12, 14) for a tire pressure monitoring system (10) for a vehicle (1), for example wheel unit (12) or vehicle unit (14), comprising at least one device (200; 200') according to Claim 13 .
  15. Tire pressure monitoring system (10) for a vehicle (1), comprising at least one device (200; 200') according to Claim 13 and/or at least one product (12, 14), for example wheel unit (12) or vehicle unit (14), according to Claim 14 .
  16. Vehicle (1) comprising at least one device (200; 200') according to Claim 13 and/or at least one product (12, 14) according to Claim 14 and/or at least a tire pressure monitoring system (10) Claim 15 .
  17. Computer-readable storage medium (SM), comprising instructions (PRG) which, when executed by a computer (202), cause it to perform the procedure according to at least one of the Claims 1 until 12 to execute.
  18. Computer program (PRG), comprising instructions which, when the program (PRG) is executed by a computer (202), cause it to perform the procedure according to at least one of the Claims 1 until 12 to execute.
  19. Data carrier signal (DCS) that the computer program (PRG) according to Claim 18 transfers and/or characterizes.
  20. Use (300) of the method according to at least one of the Claims 1 until 12 and/or the device (200; 200') according to Claim 13 and/or of the product (12, 14) according Claim 14 and/or the tire pressure monitoring system (10) according Claim 15 and/or the vehicle (1) according Claim 16 and/or the computer-readable storage medium (SM) according to Claim 17 and/or the computer program (PRG) according to Claim 18 and/or the data carrier signal (DCS) according to Claim 19 for at least one of the following elements: a) wireless exchange (301) of information, for example in the sense of out-of-band transmission, between components (12, 14) of a system, for example for tire pressure monitoring, or b) increasing (302) security, for example against eavesdropping and/or attacks, for example cryptographic, or c) enabling (303) the exchange of secrets (SEH), or d) enabling (304) a key exchange, for example for a cryptographic procedure, or e) avoiding (305) an interaction, for example human interaction, with at least one product (12, 14) for a tire pressure monitoring system (10), for example for the generation and/or exchange of cryptographic keys.

Description

State of the art The disclosure relates to a method for a tire pressure monitoring system. The disclosure also relates to a device for a tire pressure monitoring system. Disclosure of the invention Some examples refer to a method, for example a computer-implemented method, for a wheel unit attachable to or mounted on a vehicle wheel for a tire pressure monitoring system for the vehicle, wherein the tire pressure monitoring system comprises at least the wheel unit and a vehicle unit that is at least temporarily in wireless data communication with the wheel unit, comprising: providing a mapping between a number of information elements and respective condition information associated with the wheel, for example, mechanical, and exchanging initial information with the vehicle unit via the wireless data connection using this mapping. In some examples, this enables efficient out-of-band information exchange between the wheel unit and the vehicle unit, which, according to other examples, can be used, for example, for exchanging information for a cryptographic procedure, such as exchanging keys for a cryptographic procedure. For example, an exchange includes at least one of the following elements: a) sending the first information, or b) receiving the first information. In some examples, the procedure involves: assigning one information element of the number of information elements to a partial value range of at least one state variable associated with the state information, optionally sending the first information to the vehicle unit using at least some information elements of the number of information elements, optionally receiving the first information from the vehicle unit using at least some information elements of the number of information elements. For example, the information elements can each have at least one bit, or two or more bits. In some examples, the state information and/or the state variable is associated with at least one of the following elements: a) rotation angle, or b) rotation direction, or c) angular velocity, or d) steering angle (for example, relative steering angle), or e) acceleration. In some examples, the procedure involves: dividing, for example segmenting, a value range of one or the state variables associated with the state information into several, for example equally sized, partial value ranges, whereby, for example, the division is carried out with reference to a predefinable reference value, assigning one information element of the number of information elements to each of the partial value ranges. In some examples, where the state variable is, for example, the rotation angle of the wheel, the entire range of values for the rotation angle of the wheel can be, for example, 360 degrees, and the division, e.g., segmentation, can involve segmenting the entire range of values into at least two sub-ranges. In some examples, the entire range of values is divided into, for example, N many sub-ranges, where N is, for example, a power of two or an integer multiple of two. In some examples, at least two sub-ranges, for example, all sub-ranges, can each be the same size. In further examples, it is stipulated that the initial information includes at least one of the following elements: a) a secret, for example in the form of a random number or pseudorandom number, or b) a signature, for example of the secret, or c) an identification, for example an address, such as a device address, or d) a checksum, or e) redundancy, for example redundant information, for example for error detection and/or error correction, where, for example, the secret may have a checksum or where a checksum is assigned to the secret. In further examples, the procedure is provided to include: determining a first information element that can be used to describe at least a first part of the first information, where, for example, the first information element characterizes the first part of the first information, for example, represents; determining timestamp information that characterizes a time at which the state variable has a value that lies within a partial range associated with the first information element; and sending a signal characterizing the timestamp information via the wireless data link to the Vehicle unit, and, optionally, repeat at least one aspect of the detection or transmission for at least one further part of the initial information, for example, repeating the aspects of detection and transmission until all initial information has been transmitted. In this way, the initial information can be transmitted efficiently using the multiple information elements, which can be used, for example, in a way comparable to an alphabet or catalog of codewords, to build and/or transmit the initial information sequentially. In other examples, it may also be provided that a single information element is sufficient to transmit the initial information, e.g., in the case of a comparatively low information content of the initi