Anti-relay methods, smart keys, in-vehicle devices, and readable storage media

Abstract

This invention provides an anti-relay method, a smart key, an in-vehicle device, and a readable storage medium. The anti-relay method, executed by the smart key, includes: real-time detection of the smart key's state and determination of whether the smart key's state meets preset anti-relay optimized activation conditions; if so, the following steps are performed: sending a request to the in-vehicle device of the target vehicle to locate the smart key, so that the in-vehicle device generates feedback information based on the request information and sends the feedback information to the smart key; the feedback information includes the smart key's location information; if the smart key determines based on the feedback information that it is located inside the target vehicle, the anti-relay function is not activated and it enters normal working state; otherwise, the anti-relay function is activated and it enters the anti-relay state. This invention effectively resolves the conflict between keyless start anti-relay function and user experience, improving user experience while providing good anti-relay functionality, without increasing hardware costs.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to an anti-relay method, a smart key, an in-vehicle device, and a readable storage medium. Background Technology

[0002] For vehicles equipped with PEPS (Passive Entry & Passive Start) functionality, the system typically includes a PKE (Passive Keyless Enter) key, a low-frequency antenna, and a Body Control Module (BCM) that integrates PEPS functionality. The basic principle is as follows: when the PKE key is near the vehicle, a button on the door can directly trigger the low-frequency antenna to locate the key and unlock the vehicle; when the PKE key is inside the vehicle, a one-button start switch can automatically trigger the key locator to start the vehicle. The entire process eliminates the need to remove the physical key, providing great convenience to the user.

[0003] However, thieves might amplify the low-frequency antenna signal used by the vehicle to locate the key via a relay device, causing the key to be mistakenly identified as being within unlock / start range, thus unlocking / starting the vehicle and leading to its theft. To reduce the probability of relay attacks, a common solution in related technologies is to install a motion sensor on the PKE key to detect key movement. When the key remains stationary for a certain period, the anti-relay function is activated, disabling keyless entry and start functions and preventing the response to the low-frequency antenna signal (LF signal) used to locate the key. This solution effectively addresses the vulnerability of keyless entry and start functions to relay attacks.

[0004] However, research has found that this solution does not effectively balance user experience and relay protection for the Passive Start (PS) function. If preventing relay attacks on the keyless start function is required, the vehicle may fail to start after the key has been stationary inside the car for a certain period, necessitating shaking the key to start the vehicle, thus impacting the user experience. Conversely, if the vehicle can start directly after the key has been stationary inside the car for a certain period, then relay attacks on the keyless start function cannot be prevented.

[0005] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to address the problem that existing anti-relay methods for keyless start functions cannot balance user experience and anti-relay effectiveness. This invention provides an anti-relay method, a smart key, an in-vehicle device, and a readable storage medium. This invention can effectively resolve the conflict between the anti-relay function of keyless start and user experience. It not only has a better anti-relay function but also improves the user experience without increasing any hardware costs.

[0007] To achieve the above objectives, the present invention provides an anti-relay method for a keyless entry and start system, executed by the smart key of the target vehicle, the anti-relay method comprising:

[0008] The status of the smart key is monitored in real time, and it is determined whether the status of the smart key meets the preset anti-relay optimized start conditions. If so, the following steps are executed:

[0009] A request for locating the smart key is sent to the vehicle-mounted device of the target vehicle, so that the vehicle-mounted device generates feedback information based on the request information and sends the feedback information to the smart key; the feedback information includes the location information of the smart key; the location information is one of the smart key being located inside the target vehicle and the smart key being located outside the target vehicle;

[0010] If the received feedback information determines that the smart key is located inside the target vehicle, the anti-relay function is not activated and the system enters normal working mode; otherwise, the anti-relay function is activated and the system enters anti-relay mode.

[0011] Optionally, the step of real-time detection of the smart key's status and determination of whether the smart key's status meets preset anti-relay optimized startup conditions includes:

[0012] The state of the smart key is monitored in real time, and the following steps are performed when movement of the smart key is detected:

[0013] SA11: Exit anti-relay mode and clear the first timer;

[0014] SA12: Real-time detection of the status of the smart key. If movement of the smart key is detected, proceed to step SA11; if no movement of the smart key is detected, control the first timer to start timing and proceed to step SA13.

[0015] SA13: Determine whether the timing duration of the first timer is greater than or equal to the first preset duration. If yes, the state of the smart key satisfies the preset anti-relay optimization start condition; otherwise, execute step SA12.

[0016] Optionally, it is determined whether the timing duration of the first timer is greater than or equal to a first preset duration. If yes, the state of the smart key satisfies the preset anti-relay optimized start condition; if not, step SA12 is executed, including:

[0017] If the duration of the first timer is greater than or equal to the first preset duration and the smart key does not receive an RKE button during the first timer's timing period, then the state of the smart key satisfies the preset anti-relay optimized start condition; otherwise, proceed to step SA12.

[0018] Optionally, a request for locating the smart key is sent to the on-board unit of the target vehicle, so that the on-board unit generates feedback information based on the request information and sends the feedback information to the smart key, including:

[0019] Send first high-frequency information for locating the smart key to the vehicle-mounted device, so that the vehicle-mounted device generates first low-frequency information according to preset smart key configuration information and the first high-frequency information;

[0020] The received first low-frequency information is received and detected to obtain the real-time carrier field strength value of the first low-frequency information.

[0021] The vehicle-mounted device sends a second high-frequency information, including the real-time carrier field strength value, to the vehicle-mounted device, so that the vehicle-mounted device generates the location information based on the real-time carrier field strength value and a preset carrier field strength value, and sends the location information to the smart key through the feedback information.

[0022] Optionally, after sending a request to locate the smart key to the onboard unit of the target vehicle, the anti-relay method further includes:

[0023] If the smart key does not receive the feedback information within a second preset time period after sending the request information, it is determined that the smart key is outside the target vehicle, the anti-relay function is activated and the anti-relay state is entered.

[0024] To achieve the above objectives, the present invention also provides another method for preventing relaying in a keyless entry and start system, executed by an on-board device of the target vehicle, the method comprising:

[0025] The system receives a request message from the smart key of the target vehicle to locate the smart key; the request message is sent after the smart key determines that the state of the smart key meets the preset anti-relay optimized start conditions during the real-time detection of the smart key's state.

[0026] Generate feedback information based on the request information;

[0027] The feedback information is sent to the smart key so that the smart key can obtain the location information of the smart key based on the feedback information. When the smart key is located in the target vehicle, the smart key does not activate the anti-relay function and enters the normal working state; otherwise, the smart key activates the anti-relay function and enters the anti-relay state.

[0028] The feedback information includes the location information of the smart key; the location information is either the smart key is located inside the target vehicle or the smart key is located outside the target vehicle.

[0029] Optionally, receiving the request information for locating the smart key sent by the smart key of the target vehicle, generating feedback information based on the request information, and sending the feedback information to the smart key includes:

[0030] Receive first high-frequency information sent by the smart key for locating the smart key;

[0031] First low-frequency information is generated based on the preset smart key configuration information and the first high-frequency information, and the first low-frequency information is sent to the smart key so that the smart key can detect the first low-frequency information and obtain the real-time carrier field strength value of the first low-frequency information.

[0032] Receive the second high-frequency information sent by the smart key, including the real-time carrier field strength value, and generate the location information based on the real-time carrier field strength value and the preset carrier field strength value;

[0033] The location information is sent to the smart key via the feedback information.

[0034] Optionally, generating the location information based on the real-time carrier field strength value and the preset carrier field strength value includes:

[0035] If the real-time carrier field strength value is greater than or equal to the preset carrier field strength value, then the smart key is located inside the target vehicle; otherwise, the smart key is located outside the target vehicle.

[0036] To achieve the above objectives, the present invention also provides a smart key for a keyless entry and start system, the smart key comprising a motion sensor, a first processing unit, a first signal transmitting unit, and a first signal receiving unit.

[0037] The motion sensor is configured to detect the status of the smart key in real time;

[0038] The first processing unit is configured to determine whether the state of the smart key meets the preset anti-relay optimized start-up conditions based on the detection results of the motion sensor. If so, it controls the first signal transmitting unit to send a request message for locating the smart key to the vehicle-mounted device of the target vehicle, so that the vehicle-mounted device generates feedback information based on the request message and sends the feedback information to the smart key. The feedback information includes the location information of the smart key, which is either the smart key is located inside the target vehicle or the smart key is located outside the target vehicle.

[0039] The first signal receiving unit is configured to receive the feedback information;

[0040] The first processing unit is further configured to, if it is determined from the received feedback information that the smart key is located inside the target vehicle, not to activate the anti-relay function and to enter normal working state; otherwise, to activate the anti-relay function and enter the anti-relay state.

[0041] To achieve the above objectives, the present invention also provides a vehicle-mounted device for a keyless entry and start system, the vehicle-mounted device including a second signal receiving unit, a second processing unit, and a second signal transmitting unit;

[0042] The second signal receiving unit is configured to receive a request message sent by the smart key of the target vehicle for locating the smart key; the request message is sent after the smart key determines that the state of the smart key meets the preset anti-relay optimized start conditions during the real-time detection of the smart key's state.

[0043] The second processing unit is configured to generate feedback information based on the request information;

[0044] The second signal transmitting unit is configured to send the feedback information to the smart key, so that the smart key obtains its location information based on the feedback information, and when the smart key is inside the target vehicle, the smart key does not activate the anti-relay function and enters normal working state; otherwise, the smart key activates the anti-relay function and enters anti-relay state; wherein, the feedback information includes the location information of the smart key; the location information is one of the smart key being inside the target vehicle or the smart key being outside the target vehicle.

[0045] To achieve the above objectives, the present invention also provides a readable storage medium storing a computer program, which, when executed by a processor, implements the anti-relay method described in any of the preceding claims.

[0046] Compared with existing technologies, the anti-relay method, smart key, vehicle-mounted device, and readable storage medium provided by this invention have the following advantages:

[0047] The present invention provides an anti-relay method for keyless entry and start systems. First, it detects the state of the smart key in real time and determines whether the smart key's state meets preset anti-relay optimized start conditions. If the preset anti-relay optimized start conditions are met, a request for locating the smart key is sent to the on-board unit of the target vehicle, thereby accurately obtaining the smart key's location information. The anti-relay function is only activated when the smart key is outside the target vehicle; when the smart key is inside the target vehicle, the anti-relay function is not activated and the system enters normal operation. That is, even if the smart key remains stationary inside the target vehicle for a certain period, it does not affect the user's ability to start the vehicle; and even if the key remains stationary outside the target vehicle for a certain period, the keyless entry and start anti-relay functions can still be effectively activated. This invention effectively resolves the conflict between keyless start anti-relay function and user experience, not only providing good anti-relay functionality but also improving user experience without increasing hardware costs. Furthermore, the smart key's location process is mainly implemented by the on-board unit (such as the body controller), which places relatively low demands on the smart key, requires minimal modification, and is easy to implement.

[0048] Since the smart key, vehicle-mounted device, and readable storage medium provided by this invention belong to the same inventive concept as the anti-relay method for keyless entry and start systems provided by this invention, the smart key, vehicle-mounted device, and readable storage medium provided by this invention have at least all the advantages of the anti-relay method for keyless entry and start systems provided by this invention. For details on the beneficial effects of the smart key, vehicle-mounted device, and readable storage medium provided by this invention, please refer to the above description of the beneficial effects of the anti-relay method for keyless entry and start systems provided by this invention, which will not be repeated here. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the overall process of the anti-relay method for a keyless entry and start system provided in the first embodiment of the present invention;

[0050] Figure 2 for Figure 1 A flowchart illustrating a specific example of step SA1;

[0051] Figure 3a for Figure 1 A schematic diagram illustrating the principle of a specific example of step SA2 in the middle;

[0052] Figure 3b for Figure 1 A flowchart illustrating a specific example of step SA2;

[0053] Figure 4 This is a schematic diagram illustrating a specific example of an anti-relay method for a keyless entry and start system provided in the first embodiment of the present invention.

[0054] Figure 5 This is a schematic diagram of the overall process of the anti-relay method for a keyless entry and start system provided in the second embodiment of the present invention;

[0055] Figure 6 A schematic diagram of the block structure of a smart key for a keyless entry and start system provided in the third embodiment of the present invention;

[0056] Figure 7 A schematic diagram of the block structure of a vehicle-mounted device for a keyless entry and start system provided in the fourth embodiment of the present invention;

[0057] The reference numerals in the attached figures are as follows:

[0058] Target vehicle -100;

[0059] Smart key-110, motion sensor-111, first processing unit-112, first signal transmitting unit-113, first signal receiving unit-114;

[0060] Vehicle-mounted device-120, second signal receiving unit-121, second processing unit-122, second signal transmitting unit-123. Detailed Implementation

[0061] The following detailed description, in conjunction with the accompanying drawings, further illustrates the anti-relay method, smart key, vehicle-mounted device, and readable storage medium proposed in this invention. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clearly illustrate the embodiments of this invention. Please refer to the drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this invention. Any modifications to the structure, changes in proportions, or adjustments to the size, provided that the effects and objectives achieved by this invention are the same or similar, should still fall within the scope of the technical content disclosed in this invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and usage environment. Furthermore, in the embodiments described below, the same reference numerals are sometimes used across different drawings to denote the same parts or parts having the same function, omitting repeated descriptions. In this specification, similar reference numerals and letters are used to denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures. Furthermore, if the methods described herein involve a series of steps, and the order of these steps presented herein is not necessarily the only possible order in which they can be performed, some of the described steps may be omitted and / or other steps not described herein may be added to the method.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The singular forms “a,” “an,” and “the” include plural objects. The term “or” is generally used to mean “and / or,” the term “several” is generally used to mean “at least one,” and the term “at least two” is generally used to mean “two or more.” Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0063] The core idea of ​​this invention is to provide an anti-relay method, a smart key, an in-vehicle device, and a readable storage medium. This invention can effectively solve the conflict between the anti-relay function of keyless start and user experience. It not only has a good anti-relay function, but also improves the user experience, without increasing any hardware costs.

[0064] To achieve the above-mentioned goals and address the problem of balancing user experience and anti-relay effectiveness in existing keyless start (PEPS) anti-relay methods, the inventors of this invention, through continuous in-depth research and practice, have proposed an optimized anti-relay scheme. The basic principle of this scheme is as follows: When the smart key (PKE) remains stationary for a continuous period of time, meeting the criteria for activating the anti-relay function, the smart key automatically sends a high-frequency (RF) signal to request the vehicle controller to drive a low-frequency antenna to locate the key. The result of the key location is then fed back to the smart key via a low-frequency (LF) signal. The smart key determines its location based on the received low-frequency signal. If the smart key is inside the vehicle, the anti-relay function is not activated; if the smart key is outside the vehicle or has not received the low-frequency signal, it no longer responds to the PEPS key-finding low-frequency signal, thus achieving the anti-relay effect. The anti-relay state will only exit and return to normal mode once the smart key detects movement again.

[0065] Based on the above research, the first embodiment of the present invention provides an anti-relay method for a keyless entry and start system. The anti-relay method provided in this embodiment is executed by the smart key of the target vehicle. Specifically, please refer to... Figure 1 , Figure 1 This is a schematic diagram of the overall process for the anti-relay method of the keyless entry and start system provided in this embodiment. From... Figure 1 As can be seen, the anti-relay method provided in this embodiment includes the following steps:

[0066] SA1: Real-time detection of the smart key's status, and determination of whether the smart key's status meets the preset anti-relay optimized startup conditions. If so, the following steps are executed:

[0067] SA2: Send a request message to the vehicle-mounted device of the target vehicle for locating the smart key, so that the vehicle-mounted device generates feedback information based on the request message and sends the feedback information to the smart key; the feedback information includes the location information of the smart key; the location information is one of the smart key being located inside the target vehicle or the smart key being located outside the target vehicle;

[0068] SA3: If the received feedback information determines that the smart key is located inside the target vehicle, the anti-relay function is not activated and the system enters normal working state; otherwise, the anti-relay function is activated and the system enters anti-relay state.

[0069] Therefore, the anti-relay method for keyless entry and start systems provided by this invention first detects the state of the smart key in real time and determines whether the state of the smart key meets the preset anti-relay optimized start conditions. When the preset anti-relay optimized start conditions are met, a request for locating the smart key is sent to the vehicle's on-board unit, thereby accurately obtaining the location information of the smart key. The anti-relay function is only activated when the smart key is outside the target vehicle; when the smart key is inside the target vehicle, the anti-relay function is not activated and the system enters normal working state. That is, even if the smart key remains stationary inside the target vehicle for a certain period of time, it does not affect the user's ability to start the vehicle; even if the key remains stationary outside the target vehicle for a certain period of time, the keyless entry and start anti-relay functions can still be effectively activated. This invention can effectively solve the conflict between the keyless start anti-relay function and user experience, not only having a good anti-relay function but also improving the user experience, without increasing any hardware costs. Furthermore, the smart key positioning process is mainly implemented by the on-board unit (such as the body controller), which has relatively low requirements for the smart key, requires minimal modification, and is easy to implement.

[0070] Preferably, in some exemplary embodiments, please refer to Figure 2 , Figure 2 for Figure 1 A flowchart illustrating a specific example of step SA1. From Figure 2 As can be seen, step SA1, which involves real-time detection of the smart key's status and determination of whether the smart key's status meets the preset anti-relay optimized startup conditions, includes:

[0071] The state of the smart key is monitored in real time, and the following steps are performed when movement of the smart key is detected:

[0072] SA11: Exit anti-relay mode and clear the first timer;

[0073] SA12: Real-time detection of the status of the smart key. If movement of the smart key is detected, proceed to step SA11; if no movement of the smart key is detected, control the first timer to start timing and proceed to step SA13.

[0074] SA13: Determine whether the timing duration of the first timer is greater than or equal to the first preset duration. If yes, the state of the smart key satisfies the preset anti-relay optimization start condition; otherwise, execute step SA12.

[0075] Therefore, the anti-relay method for keyless entry and start system provided by the present invention can improve the accuracy and sensitivity of anti-relay of smart keys by clearing the first timer when the movement of the smart key is detected and monitoring the duration of the smart key being stationary through the first timer.

[0076] It should be noted that, as those skilled in the art will understand, the present invention does not limit the first preset duration in any way. For example, the first preset duration is preferably any value between 60s and 600s, and more preferably, the first preset duration can be 120s. Furthermore, it should be noted that, based on the above description, those skilled in the art should understand that the anti-relay method for a keyless entry and start system provided by the present invention detects in real time whether the smart key is moving or stationary. Only when movement of the smart key is detected can the working state of the smart key be changed. After the smart key is in a stable state of normal operation or anti-relay operation following steps SA2 and SA3, unless movement of the smart key is detected again, causing the smart key to operate in normal operation (if the previous working state of the smart key was anti-relay operation, then exiting the anti-relay operation), and the duration of its continuous stationary state detected again exceeds the first preset duration, steps SA2 and SA3 will be executed. Otherwise, the smart key will maintain its original working state, only executing step SA1 of real-time detection of the smart key's state, and will not execute steps SA2 and SA3 again. Furthermore, as a preferred implementation, when performing step SA3 to bring the smart key into a steady state of normal operation or anti-relay state, it is recommended to simultaneously clear the first timer.

[0077] It should be further noted that those skilled in the art should understand that the present invention does not limit the specific method of detecting whether the smart key is moving or stationary, including but not limited to detecting whether the smart key is moving or stationary through the smart key's motion sensor.

[0078] Preferably, in some exemplary embodiments, step SA13 determines whether the timing duration of the first timer is greater than or equal to a first preset duration. If yes, the state of the smart key satisfies the preset anti-relay optimized activation condition; if not, step SA12 is executed, specifically including:

[0079] If the duration of the first timer is greater than or equal to the first preset duration and the smart key does not receive an RKE (Remote Keyless Entry) button during the first timer's timing period, then the state of the smart key satisfies the preset anti-relay optimized start condition; otherwise, proceed to step SA12.

[0080] Therefore, the anti-relay method for keyless entry and start systems provided by this invention only determines that the preset anti-relay optimized start condition is met when the static state of the smart key lasts for a duration longer than a first preset duration and no PKE button is received. This further improves the robustness of the anti-relay method for keyless entry and start systems provided by this invention. For example, in some embodiments that detect whether the smart key is moving or stationary using a motion sensor, it can effectively avoid the situation where the vehicle's key-finding function cannot be responded to due to the motion sensor failing and entering the anti-relay state. In other words, when the smart key receives a PKE button, it also considers the detected smart key state to be moving, not stationary.

[0081] Preferably, in some of the exemplary embodiments, Figure 3a for Figure 1 A schematic diagram illustrating the principle of one specific example of step SA2 in the middle; Figure 3b for Figure 1 A flowchart illustrating one specific example of step SA2. From Figure 3b It is not difficult to see that step SA2 sends a request message to the on-board unit of the target vehicle to locate the smart key, so that the on-board unit generates feedback information based on the request message and sends the feedback information to the smart key, including:

[0082] SA21: Send first high-frequency information for locating the smart key 110 to the vehicle device 120, so that the vehicle device 120 generates first low-frequency information according to the preset smart key 110 configuration information and the first high-frequency information;

[0083] SA22: Receive and detect the received first low-frequency information to obtain the real-time carrier field strength value (Received Signal Strength Indication, RSSI) of the first low-frequency information;

[0084] SA23: Send a second high-frequency information including the real-time carrier field strength value to the vehicle-mounted device 120, so that the vehicle-mounted device 120 generates the location information based on the real-time carrier field strength value and the preset carrier field strength value, and sends the location information to the smart key 110 through the feedback information.

[0085] Therefore, the anti-relay method for keyless entry and start systems provided by this invention, when the continuous static time of the smart key 110 meets the conditions for activating the anti-relay function, automatically sends the first high-frequency information for locating the smart key 110 to the vehicle-mounted device 120 to obtain the real-time carrier field strength value of the first low-frequency information returned by the vehicle-mounted device 120, and sends the real-time carrier field strength value to the vehicle-mounted device 120 through the second high-frequency information, so that the vehicle-mounted device 120 can obtain the location information of the smart key 110 according to the returned real-time carrier field strength value and the preset carrier field strength value, and send it to the smart key 110 through feedback information. Thus, the smart key 110 can decide whether to activate the anti-relay function based on the location information of the smart key 110, thereby effectively solving the conflict between the keyless start anti-relay function and user experience. It not only has a better anti-relay function, but also improves the user experience, without increasing any hardware costs.

[0086] Preferably, in some exemplary embodiments, after step SA21 sends a request for locating the smart key 110 to the on-board unit 120 of the target vehicle 100, the anti-relay method further includes:

[0087] If the smart key 110 does not receive the feedback information within a second preset time period after sending the request information, it is determined that the smart key 110 is located outside the target vehicle 100, and the anti-relay function is activated and the anti-relay state is entered.

[0088] Therefore, the anti-relay method for keyless entry and start system provided by the present invention, which determines that the smart key 110 is located outside the target vehicle 100 if the smart key 110 does not receive the feedback information within a second preset time after sending the request information, can further improve the anti-relay effect and security of the anti-relay method provided by the present invention.

[0089] It should be noted that, as those skilled in the art will understand, the present invention does not impose any limitation on the second preset duration. For example, the second preset duration is preferably any value between 2s and 15s; more preferably, the first preset duration can be 6s. In specific implementation of the present invention, the smart key can issue the request information or reset the second timer and start timing. If the feedback information has not been received when the timing duration of the second timer is equal to or greater than the second preset duration, it is determined that the smart key is outside the target vehicle, thereby activating the anti-relay function.

[0090] It should be noted that those skilled in the art should understand that the present invention does not limit the timing method of the first timer and the second timer. In some embodiments, the positive timing method described above can be used to compare the timing duration with the preset duration to determine whether the timeout has occurred. In other embodiments, a countdown method can also be used to determine whether the timeout has occurred by judging whether the countdown has ended.

[0091] For example, please see Figure 4 , Figure 4 This is a schematic diagram illustrating a specific example of an anti-relay method for a keyless entry and start system provided in the first embodiment of the present invention. Figure 4 As can be seen, the anti-relay method for keyless entry and start systems provided by this invention is implemented through interaction between the smart key and the vehicle controller (equivalent to an on-board unit). In this example, the motion sensor of the smart key detects the status of the smart key in real time. If motion is detected, the smart key exits the anti-relay state, and the 120-second timer is reset. If no motion is detected, a timer is started, and it is determined whether the timer duration exceeds 120 seconds and no PKE button is received within that timer duration. If not (i.e., the timer duration is less than 120 seconds or a PKE button is received within that timer duration), the detection of the smart key status continues. If yes (i.e., the timer duration is greater than or equal to 120 seconds and no PKE button is received within that timer duration), a request for locating the smart key is sent to the vehicle controller (i.e., the on-board unit) of the target vehicle. The vehicle controller drives a low-frequency antenna to emit a low-frequency signal to locate the key, and the vehicle controller sends the location information of the smart key to the smart key through feedback information. If the smart key receives feedback information that it is inside the target vehicle within 6 seconds, it indicates that the smart key is inside the target vehicle, and the anti-relay function is not activated, entering normal working state, and the first timer is reset to zero; otherwise, it indicates that the smart key is outside the target vehicle, the anti-relay function is activated and it enters anti-relay state, the smart key no longer responds to the low-frequency signal for finding the key; the first timer is reset to zero.

[0092] Unlike the anti-relay method for a keyless entry and start system provided in the first embodiment, which corresponds to a smart key, the anti-relay method for a keyless entry and start system provided in the second embodiment of the present invention is executed by the on-board unit of the target vehicle. Specifically, please refer to... Figure 5 , Figure 5 This is a schematic diagram of the overall process for an anti-relay method for a keyless entry and start system provided in the second embodiment of the present invention. From... Figure 5 As can be seen, the anti-relay method provided in this embodiment includes the following steps:

[0093] SB1: Receives a request message from the smart key of the target vehicle for locating the smart key; the request message is sent after the smart key determines that the state of the smart key meets the preset anti-relay optimized start conditions during the real-time detection of the smart key's state.

[0094] SB2: Generate feedback information based on the requested information;

[0095] SB3: The feedback information is sent to the smart key, so that the smart key obtains its location information based on the feedback information. When the smart key is inside the target vehicle, the smart key does not activate the anti-relay function and enters normal working state; otherwise, the smart key activates the anti-relay function and enters anti-relay state. The feedback information includes the location information of the smart key, which is either the smart key is inside the target vehicle or the smart key is outside the target vehicle.

[0096] Since the anti-relay method for keyless entry and start systems provided in this embodiment belongs to the same inventive concept as the anti-relay method for keyless entry and start systems provided in the first embodiment of the present invention, the beneficial effects of the anti-relay method for keyless entry and start systems provided in this embodiment can be found in the relevant description of the beneficial effects of the anti-relay method for keyless entry and start systems provided in Embodiment 1 above, and will not be repeated here. Furthermore, since the basic principle of the anti-relay method for keyless entry and start systems provided in this embodiment is the same as that of the anti-relay method for keyless entry and start systems provided in the first embodiment of the present invention, to avoid redundancy, only the parts not described in Embodiment 1 will be explained below. For the parts not described in this embodiment, please refer to the relevant description in Embodiment 1 above for an adaptive understanding, and will not be elaborated here.

[0097] Preferably, in some exemplary embodiments, receiving a request message from the smart key of the target vehicle for locating the smart key, generating feedback information based on the request message, and sending the feedback information to the smart key includes:

[0098] Receive first high-frequency information sent by the smart key for locating the smart key;

[0099] First low-frequency information is generated based on the preset smart key configuration information and the first high-frequency information, and the first low-frequency information is sent to the smart key so that the smart key can detect the first low-frequency information and obtain the real-time carrier field strength value of the first low-frequency information.

[0100] Receive the second high-frequency information sent by the smart key, including the real-time carrier field strength value, and generate the location information based on the real-time carrier field strength value and the preset carrier field strength value;

[0101] The location information is sent to the smart key via the feedback information.

[0102] Therefore, the anti-relay method for keyless entry and start systems provided in this embodiment generates first low-frequency information based on preset smart key configuration information and the first high-frequency information, which can avoid illegal requests for locating the key and reduce the risk of the target vehicle being stolen. Furthermore, this design of multiple interactions between the smart key and the vehicle-mounted device—using the first high-frequency information for locating the smart key, the first low-frequency information that can detect the real-time carrier field strength value, the second high-frequency information containing the real-time carrier field strength value, and feedback information with location information—can further reduce the risk of the target vehicle being stolen.

[0103] Preferably, in some exemplary embodiments, generating the location information based on the real-time carrier field strength value and a preset carrier field strength value includes:

[0104] If the real-time carrier field strength value is greater than or equal to the preset carrier field strength value, then the smart key is located inside the target vehicle; otherwise, the smart key is located outside the target vehicle.

[0105] Therefore, the anti-relay method for keyless entry and start systems provided by this invention allows the on-board unit to determine whether the smart key is located inside or outside the target vehicle based on a preset carrier field strength value and a real-time carrier field strength value. This method not only requires minimal modification to the smart key but also has simple logic and is easy to implement. It should be noted that those skilled in the art will understand that this invention does not limit the number of smart keys in the target vehicle. The number of smart keys in the target vehicle can be any number, such as 1, 2, or 3. Furthermore, this invention does not limit the specific value or acquisition method of the preset carrier field strength value. For example, for vehicles with 2 or more smart keys, the preset carrier field strength values ​​corresponding to all smart keys can be the same or different; the preset carrier field strength value can be determined by calibration or based on experience, without excessive restrictions.

[0106] Preferably, in some preferred embodiments, the first high-frequency information includes, but is not limited to, the slot number and ID of the smart key; the preset smart key configuration information may include, but is not limited to, the identification information of all smart keys of the target vehicle, including, but not limited to, the slot number and ID of the smart key. In addition to the smart key's location information, the feedback information may also include, but is not limited to, the slot number and ID of the smart key that sent the location request.

[0107] To facilitate understanding of the present invention, the following example uses a target vehicle with two smart keys A and B to illustrate the anti-relay method for a keyless entry and start system provided in this embodiment. The preset smart key configuration information of the vehicle's on-board unit includes slot number K1 for smart key A and slot number K2 for smart key B. According to the preset smart key configuration information, the on-board unit only responds to the first high-frequency information sent by smart keys A and B for locating the smart keys. If both smart keys A and B send the first high-frequency information requesting a location to the on-board unit, since the feedback information contains the slot number or ID of the smart key, smart keys A and B can determine whether the location information of the smart key in the feedback information is their own location request based on the slot number or ID in the feedback information. This further improves the robustness and security of the anti-relay method for a keyless entry and start system provided by the present invention.

[0108] Corresponding to Embodiment 1 above, a third embodiment of the present invention provides a smart key 110 for a keyless entry and start system. Specifically, please refer to... Figure 3a and Figure 6 , Figure 6 This is a block diagram of the smart key 110 for the keyless entry and start system provided in this embodiment. From... Figure 6As can be seen, the smart key 110 provided in this embodiment includes a motion sensor 111, a first processing unit 112, a first signal transmitting unit 113, and a first signal receiving unit 114. Exemplarily, the motion sensor 111 is configured to detect the state of the smart key 110 in real time. The first processing unit 112 is configured to determine whether the state of the smart key 110 meets preset anti-relay optimized start conditions based on the detection result of the motion sensor 111. If so, it controls the first signal transmitting unit 113 to send a request message for locating the smart key 110 to the vehicle-mounted device 120 of the target vehicle 100, so that the vehicle-mounted device 120 generates feedback information based on the request information and sends the feedback information to the smart key 110. The feedback information includes the location information of the smart key 110; the location information is either the smart key 110 being located inside the target vehicle 100 or the smart key 110 being located outside the target vehicle 100. The first signal receiving unit 114 is configured to receive the feedback information. The first processing unit 112 is further configured to, if it is determined from the received feedback information that the smart key 110 is located inside the target vehicle 100, then not to activate the anti-relay function and enter normal working state; otherwise, to activate the anti-relay function and enter the anti-relay state.

[0109] Since the smart key 110 provided by this invention and the anti-relay method for keyless entry and start systems provided by this invention belong to the same inventive concept, the smart key 110 provided by this invention possesses at least all the advantages of the anti-relay method for keyless entry and start systems provided by this invention. For details regarding the beneficial effects of the smart key 110 provided by this invention, please refer to the above description of the beneficial effects of the anti-relay method for keyless entry and start systems provided by this invention; further details will not be repeated here. Furthermore, since the basic principle of the smart key 110 provided by this invention is the same as the basic principle of the anti-relay method for keyless entry and start systems provided in Embodiment 1 of this invention, for more detailed information regarding the smart key 110 provided by this invention, please refer to the above description of the anti-relay method for keyless entry and start systems provided in Embodiment 1 for an adaptive understanding; further details will not be repeated here.

[0110] It should be noted that, as those skilled in the art will understand, the present invention does not limit the specific implementation of the motion sensor 111, the first processing unit 112, the first signal transmitting unit 113, and the first signal receiving unit 114. For example, the motion sensor 111 may be, but is not limited to, an accelerometer, a gyroscope, a geomagnetic sensor, and an electronic compass sensor; the first processing unit 112 may be a microprocessor (MPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.; the first signal transmitting unit may be, but is not limited to, a high-frequency signal transmitting device; and the first signal receiving unit 114 may be, but is not limited to, a high-frequency signal receiving device.

[0111] Corresponding to Embodiment 2 above, the fourth embodiment of the present invention provides a vehicle-mounted device 120 for a keyless entry and start system. Specifically, please refer to... Figure 3a and Figure 7 , Figure 7 This is a block diagram of the vehicle-mounted device 120 for a keyless entry and start system provided in this embodiment. From... Figure 7As can be seen, the vehicle-mounted device 120 provided in this embodiment includes a second signal receiving unit 121, a second processing unit 122, and a second signal transmitting unit 123. Exemplarily, the second signal receiving unit 121 is configured to receive a request message sent by the smart key 110 of the target vehicle 100 for locating the smart key 110; the request message is sent after determining that the state of the smart key 110 meets preset anti-relay optimized start conditions during the real-time detection of the smart key 110's state. The second processing unit 122 is configured to generate feedback information based on the request message. The second signal transmitting unit 123 is configured to send the feedback information to the smart key 110, so that the smart key 110 obtains its location information based on the feedback information, and when the smart key 110 is inside the target vehicle 100, the smart key 110 does not activate the anti-relay function and enters normal working state; otherwise, the smart key 110 activates the anti-relay function and enters the anti-relay state; wherein, the feedback information includes the location information of the smart key 110; the location information is one of the smart key 110 being inside the target vehicle 100 and the smart key 110 being outside the target vehicle 100.

[0112] Since the vehicle-mounted device 120 provided by this invention and the anti-relay method for keyless entry and start systems provided by this invention belong to the same inventive concept, the vehicle-mounted device 120 provided by this invention possesses at least all the advantages of the anti-relay method for keyless entry and start systems provided by this invention. For details regarding the beneficial effects of the vehicle-mounted device 120 provided by this invention, please refer to the above description of the beneficial effects of the anti-relay method for keyless entry and start systems provided by this invention; further details will not be repeated here. Furthermore, since the basic principle of the vehicle-mounted device 120 provided by this invention is the same as the basic principle of the anti-relay method for keyless entry and start systems provided in Embodiment 2 of this invention, for more detailed information regarding the vehicle-mounted device 120 provided by this invention, please refer to the above description of the anti-relay method for keyless entry and start systems provided in Embodiment 2 for an adaptive understanding; further details will not be repeated here.

[0113] It should be noted that, as those skilled in the art will understand, the present invention does not limit the specific implementation of the vehicle-mounted device 120. For example, the vehicle-mounted device 120 may be a vehicle body controller; the second signal receiving unit 121 may be, but is not limited to, a low-frequency signal receiving device; the second signal transmitting unit 123 may be, but is not limited to, a low-frequency signal transmitting device; the second processing unit 122 may be a microprocessor (MPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The present invention does not impose excessive limitations in this regard.

[0114] A fifth embodiment of the present invention provides a readable storage medium storing a computer program. When executed by a processor, the computer program can implement the anti-relay method described above. Since the readable storage medium provided by the present invention and the anti-relay method for keyless entry and start systems provided by the present invention belong to the same inventive concept, the readable storage medium provided by the present invention possesses at least all the advantages of the anti-relay method for keyless entry and start systems provided by the present invention. For detailed information on the beneficial effects of the readable storage medium provided by the present invention, please refer to the above description of the beneficial effects of the anti-relay method for keyless entry and start systems provided by the present invention; further details will not be repeated here.

[0115] The readable storage medium of embodiments of the present invention can be any combination of one or more computer-readable media. The readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (not exhaustive examples) of a computer-readable storage medium include: an electrical connection having one or more wires, a portable computer hard disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, apparatus, or device.

[0116] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0117] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0118] Compared with existing technologies, the anti-relay method, smart key, vehicle-mounted device, and readable storage medium provided by this invention have the following advantages:

[0119] The present invention provides an anti-relay method for keyless entry and start systems. First, it detects the state of the smart key in real time and determines whether the smart key's state meets preset anti-relay optimized start conditions. If the preset anti-relay optimized start conditions are met, a request for locating the smart key is sent to the on-board unit of the target vehicle, thereby accurately obtaining the smart key's location information. The anti-relay function is only activated when the smart key is outside the target vehicle; when the smart key is inside the target vehicle, the anti-relay function is not activated and the system enters normal operation. That is, even if the smart key remains stationary inside the target vehicle for a certain period, it does not affect the user's ability to start the vehicle; and even if the key remains stationary outside the target vehicle for a certain period, the keyless entry and start anti-relay functions can still be effectively activated. This invention effectively resolves the conflict between keyless start anti-relay function and user experience, not only providing good anti-relay functionality but also improving user experience without increasing hardware costs. Furthermore, the smart key's location process is mainly implemented by the on-board unit (such as the body controller), which places relatively low demands on the smart key, requires minimal modification, and is easy to implement.

[0120] Since the smart key, vehicle-mounted device, and readable storage medium provided by this invention belong to the same inventive concept as the anti-relay method for keyless entry and start systems provided by this invention, the smart key, vehicle-mounted device, and readable storage medium provided by this invention have at least all the advantages of the anti-relay method for keyless entry and start systems provided by this invention. For details on the beneficial effects of the smart key, vehicle-mounted device, and readable storage medium provided by this invention, please refer to the above description of the beneficial effects of the anti-relay method for keyless entry and start systems provided by this invention, which will not be repeated here.

[0121] It should be noted that the anti-relay method and readable storage medium for keyless entry and start systems provided by this invention can be applied to the smart key and / or vehicle-mounted device provided by this invention, and the anti-relay method, smart key, vehicle-mounted device, and readable storage medium for keyless entry and start systems provided by this invention can be applied to vehicles. It should be understood that the terms "vehicle" or "of a vehicle" or other similar terms as used herein include general motor vehicles, such as passenger vehicles including SUVs, buses, trucks, and various commercial vehicles, and include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, fuel cell vehicles, and other alternative fuel vehicles (e.g., fuels obtained from resources other than petroleum).

[0122] It should be noted that the apparatus and methods disclosed in the embodiments herein can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments herein. In this regard, each block in a flowchart or block diagram may represent a module, program, or part of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system to perform the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0123] In addition, the functional modules in the various embodiments of this article can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0124] The above description is merely a description of preferred embodiments of the anti-relay method, smart key, vehicle-mounted device, and readable storage medium provided by the present invention, and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure are within the protection scope of the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Therefore, if these modifications and variations fall within the scope of the present invention and its equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A method for preventing relaying in a keyless entry and start system, characterized in that, Executed by the smart key of the target vehicle, the anti-relay method includes: The status of the smart key is monitored in real time, and it is determined whether the status of the smart key meets the preset anti-relay optimized start conditions. If so, the following steps are executed: The system sends first high-frequency information for locating the smart key to the vehicle-mounted device of the target vehicle, so that the vehicle-mounted device generates first low-frequency information based on preset smart key configuration information and the first high-frequency information; it receives and detects the received first low-frequency information to obtain the real-time carrier field strength value of the first low-frequency information; it sends second high-frequency information including the real-time carrier field strength value to the vehicle-mounted device, so that the vehicle-mounted device generates location information based on the real-time carrier field strength value and a preset carrier field strength value, and sends the location information to the smart key through feedback information; the location information is either the smart key is located inside the target vehicle or the smart key is located outside the target vehicle. If the received feedback information determines that the smart key is located inside the target vehicle, the anti-relay function is not activated and the system enters normal working mode; otherwise, the anti-relay function is activated and the system enters anti-relay mode.

2. The anti-relay method according to claim 1, characterized in that, The real-time detection of the smart key's status and determination of whether the smart key's status meets the preset anti-relay optimized startup conditions include: The state of the smart key is monitored in real time, and the following steps are performed when movement of the smart key is detected: SA11: Exit anti-relay mode and clear the first timer; SA12: Real-time detection of the status of the smart key. If movement of the smart key is detected, proceed to step SA11; if no movement of the smart key is detected, control the first timer to start timing and proceed to step SA13. SA13: Determine whether the timing duration of the first timer is greater than or equal to the first preset duration. If yes, the state of the smart key satisfies the preset anti-relay optimization start condition; otherwise, execute step SA12.

3. The anti-relay method according to claim 2, characterized in that, Determine whether the timing duration of the first timer is greater than or equal to the first preset duration. If so, the state of the smart key satisfies the preset anti-relay optimized start condition. If not, proceed to step SA12, which includes: If the duration of the first timer is greater than or equal to the first preset duration and the smart key does not receive an RKE button during the duration of the first timer, then the state of the smart key satisfies the preset anti-relay optimized start condition. Otherwise, proceed to step SA12.

4. The anti-relay method according to claim 1, characterized in that, After sending a request to locate the smart key to the onboard unit of the target vehicle, the anti-relay method further includes: If the smart key does not receive the feedback information within a second preset time period after sending the request information, it is determined that the smart key is outside the target vehicle, the anti-relay function is activated and the anti-relay state is entered.

5. A method for preventing relaying in a keyless entry and start system, characterized in that, The anti-relay method, executed by the onboard device of the target vehicle, includes: The system receives first high-frequency information sent by the smart key of the target vehicle for locating the smart key; the first high-frequency information is sent after determining that the state of the smart key meets the preset anti-relay optimized start-up conditions during the real-time detection of the state of the smart key. First low-frequency information is generated based on preset smart key configuration information and the first high-frequency information, and sent to the smart key, so that the smart key can detect the first low-frequency information and obtain the real-time carrier field strength value of the first low-frequency information; second high-frequency information including the real-time carrier field strength value is received from the smart key, and location information is generated based on the real-time carrier field strength value and a preset carrier field strength value, and the location information is sent to the smart key through feedback information, so that the smart key can obtain the location information of the smart key based on the feedback information, and when the smart key is located in the target vehicle, the smart key does not activate the anti-relay function and enters the normal working state; otherwise, the smart key activates the anti-relay function and enters the anti-relay state; The location information refers to either the smart key being located inside the target vehicle or the smart key being located outside the target vehicle.

6. The anti-relay method according to claim 5, characterized in that, The step of generating the location information based on the real-time carrier field strength value and the preset carrier field strength value includes: If the real-time carrier field strength value is greater than or equal to the preset carrier field strength value, then the smart key is located inside the target vehicle; otherwise, the smart key is located outside the target vehicle.

7. A smart key for a keyless entry and start system, characterized in that, The smart key includes a motion sensor, a first processing unit, a first signal transmitting unit, and a first signal receiving unit; The motion sensor is configured to detect the status of the smart key in real time; The first processing unit is configured to determine whether the state of the smart key meets the preset anti-relay optimized start conditions based on the detection result of the motion sensor. If so, it controls the first signal transmitting unit to send the first high-frequency information for locating the smart key to the vehicle-mounted device of the target vehicle, so that the vehicle-mounted device generates the first low-frequency information according to the preset smart key configuration information and the first high-frequency information. The received first low-frequency information is received and detected to obtain the real-time carrier field strength value of the first low-frequency information. The vehicle-mounted device sends a second high-frequency information, including the real-time carrier field strength value, to the vehicle-mounted device, so that the vehicle-mounted device generates location information based on the real-time carrier field strength value and a preset carrier field strength value, and sends the location information to the smart key through feedback information; the location information is one of the following: the smart key is located inside the target vehicle, or the smart key is located outside the target vehicle. The first signal receiving unit is configured to receive the feedback information; The first processing unit is further configured to, if it is determined from the received feedback information that the smart key is located inside the target vehicle, not to activate the anti-relay function and to enter normal working state; otherwise, to activate the anti-relay function and enter the anti-relay state.

8. A vehicle-mounted device for a keyless entry and start system, characterized in that, The vehicle-mounted device includes a second signal receiving unit, a second processing unit, and a second signal transmitting unit; The second signal receiving unit is configured to receive first high-frequency information sent by the smart key of the target vehicle for locating the smart key; the first high-frequency information is sent after determining that the state of the smart key meets the preset anti-relay optimized start conditions during the process of the smart key detecting the state of the smart key in real time; The second processing unit is configured to generate first low-frequency information based on preset smart key configuration information and the first high-frequency information, and send the first low-frequency information to the smart key, so that the smart key detects the first low-frequency information and obtains the real-time carrier field strength value of the first low-frequency information; receive second high-frequency information including the real-time carrier field strength value sent by the smart key, and generate location information based on the real-time carrier field strength value and the preset carrier field strength value; The second signal transmitting unit is configured to send the location information to the smart key via feedback information, so that the smart key obtains the location information of the smart key according to the feedback information, and when the smart key is inside the target vehicle, the smart key does not activate the anti-relay function and enters normal working state; otherwise, the smart key activates the anti-relay function and enters the anti-relay state; wherein, the location information is one of the smart key being inside the target vehicle and the smart key being outside the target vehicle.

9. A readable storage medium, characterized in that, The readable storage medium stores a computer program, which, when executed by a processor, implements the anti-relay method according to any one of claims 1 to 6.

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