Multi-key search and authentication method and device and vehicle

Abstract

The embodiment of the invention provides a multi-key search and authentication method and device and a vehicle, and relates to the technical field of automobile keys. The method comprises the following steps: broadcasting a key search message, wherein the key search message is used for searching keys and carries a response sequence of at least two keys; receiving response messages about the key search messages fed back by the at least two keys according to the response sequence; and authenticating the at least two keys according to the response message about the key search message, thereby avoiding the problem of high-frequency message conflict in the key search and authentication process and improving the key authentication efficiency.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of vehicle keys, and particularly to a multi-key search and authentication method, device and vehicle. Background Art

[0002] The Passive Entry&Passive Start System (PEPS) of vehicles has become one of the most representative solutions in the field of wireless vehicle entry applications. Domestic vehicle manufacturers have initially promoted PEPS from the original mid- and high-end configuration models to mid- and low-end models, and even made it a standard feature for each model.

[0003] Since each vehicle is generally equipped with multiple keys, and the wireless channels of these keys are all in the same frequency band. Especially for vehicles of the same manufacturer, the preambles of the high-frequency wireless signals of their keys are the same. When there are keys of other vehicles of the same manufacturer around the vehicle, during the process of key search and authentication, message conflicts may occur in the same frequency band, resulting in excessive power consumption and time consumption. Summary of the Invention

[0004] The embodiments of the present invention propose a multi-key search and authentication method, device and vehicle to solve the above problems.

[0005] In a first aspect, the embodiments of the present invention provide a multi-key search and authentication method, the method comprising: broadcasting a key search message, the key search message being used to search for keys and carrying the response order of at least two keys; sequentially receiving response messages about the key search message fed back by the at least two keys according to the response order; and authenticating the at least two keys according to the response messages about the key search message.

[0006] In a second aspect, the embodiments of the present invention provide a multi-key search and authentication method, the method comprising: in response to receiving a key search message, determining its own response order according to the key search message, wherein the key search message is used to search for keys and carries the response order of at least two keys; and feeding back a response message about the key search message to the vehicle according to its own response order.

[0007] In a third aspect, the embodiments of the present invention provide a multi-key search and authentication device, the device comprising: a message broadcasting module, configured to broadcast a key search message, the key search message being used to search for keys and carrying the response order of at least two keys; a message receiving module, configured to sequentially receive response messages about the key search message fed back by the at least two keys according to the response order; and a key search module, configured to authenticate the at least two keys according to the response messages about the key search message.

[0008] Fourth aspect, an embodiment of the present invention provides a vehicle, which includes: a memory and a processor. Wherein, an application program is stored in the memory, and the application program is used to execute the method provided in the first aspect when called by the processor.

[0009] Fifth aspect, an embodiment of the present invention provides a multi-key search and authentication system, which includes: a vehicle and a key. Wherein, the vehicle and the key cooperate to execute the method provided in the second aspect.

[0010] Sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, in which program code is stored, and the program code is used to execute the method provided in the first aspect when called by a processor.

[0011] In a multi-key search and authentication method, device and vehicle provided by an embodiment of the present invention, the response order of at least two keys is specified through a key search message; so that at least two keys can sequentially feedback response messages about the key search message at different times according to the response order, thereby ensuring that at least two keys can feedback in an orderly manner and avoiding the problem of high-frequency message conflicts in the key search and authentication process. In addition, after receiving the response messages of at least two keys, the at least two keys are authenticated together, so that the at least two keys can be authenticated in the same batch, without the need for each key to be authenticated separately, reducing the time required for overall authentication and improving the key authentication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0013] Figure 1 Shows a schematic structural diagram of a multi-key search and authentication system provided by an embodiment of the present invention; Figure 2 Shows a schematic structural diagram of a multi-key search and authentication system provided by an exemplary embodiment of the present invention; Figure 3 Shows a schematic diagram of the installation position of a low-frequency antenna provided by an exemplary embodiment of the present invention; Figure 4 Shows a schematic diagram of the installation position of a low-frequency antenna provided by another exemplary embodiment of the present invention; Figure 5Shows a schematic flowchart of a multi-key search and authentication method provided by an embodiment of the present invention; Figure 6 Shows a schematic flowchart of a multi-key search and authentication method provided by another embodiment of the present invention; Figure 7 Shows a schematic diagram of the message sending and receiving timeline when obtaining the signal strength provided by an exemplary embodiment of the present invention; Figure 8 Shows a schematic diagram of the message sending and receiving timeline when obtaining the signal strength in the related art provided by an exemplary embodiment of the present invention; Figure 9 Shows a schematic flowchart of a multi-key search and authentication method provided by another embodiment of the present invention; Figure 10 Shows a timing flowchart of a multi-key search and authentication method provided by another embodiment of the present invention; Figure 11 Shows a timing flowchart of a multi-key search and authentication method provided by an exemplary embodiment of the present invention; Figure 12 Shows a schematic structural diagram of a multi-key search and authentication device provided by an embodiment of the present invention; Figure 13 Shows a schematic structural diagram of a vehicle provided by an embodiment of the present invention. Detailed implementation manners

[0014] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0015] Please refer to Figure 1 , Figure 1 shows a schematic structural diagram of a multi-key search and authentication system provided by an embodiment of the present invention. The multi-key search and authentication system 100 includes a vehicle 110 and a key 120. The vehicle 110 and the key 120 cooperate to execute the multi-key search and authentication method, and the vehicle 110 and the key 120 are wirelessly connected and can realize wireless communication with each other. The vehicle 110 may include, but is not limited to, a gasoline vehicle or an electric vehicle, and the electric vehicle may include, but is not limited to, a pure electric vehicle, a hybrid vehicle, or a fuel cell vehicle, etc. The key 120 may include, but is not limited to, a remote control key, a near field communication (NFC) key, a Bluetooth key, a smart phone, and a biometric key, etc.

[0016] See Figure 2 , there can be multiple keys 120, such as keys 1 - 3. Keys 1 - 3 all have a binding relationship with the vehicle 110, that is, keys 1 - 3 can all be used to unlock the vehicle 110. The key 120 has a high - frequency radio frequency (RF) module ( Figure 2 not shown in the figure), and the high - frequency RF module is used to transmit high - frequency (e.g., 433 megahertz) wireless signals, thereby realizing the transmission of high - frequency data frames.

[0017] See Figure 2 , the vehicle 110 can include a high - frequency RF module, a controller, and a low - frequency antenna. Data interaction between keys 1 - 3 and the high - frequency RF module is achieved through high - frequency wireless signals, that is, keys 1 - 3 and the high - frequency RF module can send high - frequency data frames to each other. Communication between the high - frequency RF module and keys 1 - 3 is achieved through high - frequency wireless signals, which has the advantages of small size, low cost, etc., and can achieve stable and reliable data transmission in crowded frequency bands.

[0018] The high - frequency RF module is connected to the controller. After receiving the high - frequency wireless signal, the high - frequency RF module can forward the high - frequency wireless signal to the controller so that the controller can make a response and subsequent analysis and processing. The connection method between the high - frequency RF module and the controller can include but is not limited to Controller Area Network (CAN) bus, CAN with Flexible Data rate (CANFD) bus, Ethernet connection, etc. In some embodiments, see Figure 2 , the high - frequency RF module can be connected to the controller through two CAN buses, thereby realizing redundant communication, improving the communication robustness inside the vehicle, and improving the robustness and efficiency of key search and authentication.

[0019] The controller can be used to manage the body electronics of the vehicle 110. The body electronics can include but are not limited to door locks and windows, etc. The controller can receive the high - frequency wireless signal sent by the high - frequency RF module, and make a response and analysis and processing on the high - frequency wireless signal, thereby controlling the body electronics. The controller can be a domain controller of the vehicle 110, and the domain controller can include but is not limited to a body domain controller and a central domain controller, etc. It can be understood that since the controller itself does not have the function of signal transceiver, it needs to cooperate with the high - frequency RF module for signal reception and processing.

[0020] The low - frequency antenna can be at least three, and at least three low - frequency antennas can be respectively deployed at the rear, middle, and side of the vehicle 110. To enhance the signal strength and thus achieve precise positioning, for example, see Figure 3 , the low - frequency antenna can be 6, that isFigure 3 The low-frequency antennas 1-6 shown. As Figure 3 and Figure 4 shown, the low-frequency antennas 1 and 2 can be deployed in the middle of the vehicle 110, the low-frequency antennas 3 and 4 can be deployed at the rear of the vehicle 110, and the low-frequency antennas 5 and 6 can be respectively deployed on both sides of the vehicle 110, so as to ensure a more comprehensive coverage range of wireless signal reception and transmission around the vehicle body. It should be noted that at least three antennas are required to locate the key. It can be understood that the low-frequency antennas are used to receive and send various wireless signals. Taking the key positioning function as an example, to achieve accurate positioning, at least three low-frequency antennas need to send wireless signals simultaneously, so as to achieve more accurate positioning and reduce errors.

[0021] Please refer to Figure 5 , Figure 5 which shows a schematic flowchart of a multi-key search and authentication method provided by an embodiment of the present invention. The multi-key search and authentication method can be applied to a multi-key search and authentication device or a vehicle. The multi-key search and authentication method specifically may include the following steps S110 to step S130. Hereinafter, taking the vehicle as the execution subject as an example, steps S110 to S130 will be introduced.

[0022] Step S110: Broadcast a key search message, which is used to search for keys and carry the response order of at least two keys.

[0023] Among them, at least two keys are used to unlock the vehicle. The key types of at least two keys can be the same or different. Exemplarily, at least two keys may include, but are not limited to, a remote control key, an NFC key, a Bluetooth key, a smart phone, and a biometric key, etc.

[0024] The response order of at least two keys is used to specify the order in which at least two keys reply to the key search message, so that each key can send a response message about the key search message at different times, thereby avoiding the problem of high-frequency message conflicts during the multi-key search process. The response order of at least two keys can be randomly generated or set in advance by developers. For example, the response order of keys 1-3 can be key 1, key 3, and key 2 in sequence. Among them, the specific description of the response order of at least two keys can be found in steps S210 to S240 below, and will not be elaborated here.

[0025] In some embodiments, the vehicle may periodically broadcast a key search message. The broadcast period can be set in advance according to the actual search frequency requirements. For example, the broadcast period can be 20 milliseconds per time (ms / time), so as to ensure that keys near the vehicle can be searched in time. Among them, the key search message is broadcast through the low-frequency antenna of the vehicle. Therefore, the keys near the vehicle refer to the keys within the signal emission range of the low-frequency antenna. For example, within a range of 30 to 50 meters around the vehicle as the center.

[0026] In some embodiments, for the unlocking scenario, when the vehicle is in the sleep state, the vehicle may periodically broadcast a key search message, so as to realize timely discovery of the key for unlocking the vehicle door in time when the driver approaches the vehicle, thereby automatically unlocking the vehicle door in advance and improving the user experience.

[0027] In other embodiments, for the locking scenario, when the driver gets out of the vehicle, the vehicle may periodically broadcast a key search message, so as to realize timely discovery of the key for locking the vehicle door in time when the driver is away from the vehicle, thereby automatically locking the vehicle door when the person leaves the vehicle, ensuring vehicle safety and improving the user experience at the same time.

[0028] At least two keys, in response to receiving the key search message, determine their respective response orders according to the key search message, and in accordance with their respective response orders, sequentially feedback response messages about the key search message to the vehicle. It can be understood that if a key has received the key search message sent by the same vehicle controller, it may no longer continue to receive the same key search message sent by that controller.

[0029] For example, at least two keys can determine their respective response delay times according to their respective response orders; after passing through their respective response delay times, they feedback response messages about the key search message to the vehicle. Among them, the corresponding relationship between the response order and the response delay time can be set in advance according to actual needs. The later the response order, the longer the response delay time. For example, assume there are three keys a, b, c and the response order is b, c, a. Assume that the time interval between sending response messages of adjacent keys is a fixed value of 10 milliseconds and the response delay time of key b is 0 milliseconds. Then the response delay time of key c is 10 milliseconds, and the response delay time of key a is 20 milliseconds.

[0030] Step S120: Receive response messages about the key search message feedback by at least two keys in the response order.

[0031] The response message about the key search message carries the identification information of the key, and the identification information is used to uniquely identify the key. For example, the identification information of the key can be the vehicle identity number (Identity Document, ID).

[0032] In some embodiments, after the high-frequency RF module receives a response message regarding the key search message, it can directly forward the response message of the searched key to the controller.

[0033] In other embodiments, after the high-frequency RF module receives a response message regarding the key search message, it can parse the response message regarding the key search message to obtain the identification information of at least two keys. The identification information of at least two keys (the searched keys) is respectively compared with the identification information of all the keys already stored in the high-frequency RF module to find the parsed identification information among the already stored identification information; if the parsed identification information can be found among the already stored identification information, it can be determined that the key with the parsed identification information is the key bound to the vehicle and can be used to unlock the vehicle. The high-frequency RF module sends the response message sent by the key bound to the vehicle to the controller. By filtering the messages sent by the key according to the identification information of the key, it is possible to avoid misjudging the keys of other vehicles of the same model, thereby improving the accuracy of key search and authentication and the safety of vehicle use, and avoiding using the keys of other vehicles to control the vehicle itself.

[0034] Step S130: Authenticate at least two keys according to the response message regarding the key search message.

[0035] The response message regarding the key search message also carries a first key, and the first key has a corresponding relationship with the identification information of the key, and the first key is used for key authentication. The controller of the vehicle stores the identification information of the key bound to the vehicle and a second key. The first key and the second key corresponding to the same identification information are a pair of keys that can be matched with each other.

[0036] After receiving the response message regarding the key search message, the controller parses the identification information and the first key from the response message; searches for the second key corresponding to the identification information in the controller; performs security authentication on the key with the identification information according to the first key and the second key corresponding to the identification information; if the first key and the second key corresponding to the identification information match, it is determined that the key corresponding to the identification information passes the authentication; if the first key and the second key corresponding to the identification information do not match, it is determined that the key corresponding to the identification information does not pass the security authentication. Among them, the matching method of the first key and the second key is determined according to the actual key encryption method adopted, and the key encryption and decryption method can include but is not limited to symmetric key encryption method and symmetric non-key encryption method.

[0037] Based on steps S110 to S130, the key search message stipulates the response order of at least two keys; such that at least two keys can sequentially feedback response messages regarding the key search message at different times according to the response order, thereby ensuring that at least two keys can feedback in an orderly manner and avoiding the problem of high-frequency message conflicts during the key search and authentication process. Additionally, after receiving the response messages of at least two keys, authenticate the at least two keys together, enabling the at least two keys to be authenticated in the same batch, without the need for each key to be authenticated individually, reducing the overall authentication time required and improving the key authentication efficiency, to adapt to more key demand scenarios.

[0038] Please refer to Figure 6 , in some embodiments, after step S130, if at least two keys pass the authentication, the multi-key search and authentication method further includes the following steps S140 to S150.

[0039] Step S140: When at least two keys pass the authentication, obtain the signal strength of the at least two keys according to the response order of the at least two keys.

[0040] The signal strength of at least two keys can refer to the Received Signal Strength Indicator (RSSI) of at least two keys, that is, the signal strength index of the radio waves emitted by at least two keys. The higher the RSSI value, the stronger the signal and the better the communication effect.

[0041] When at least two keys pass the authentication, the controller can control at least three antennas to send a signal strength acquisition message to the authenticated keys. The signal strength acquisition message is used to obtain the signal strength of the keys. After receiving the signal strength acquisition message, the keys can feedback the signal strength to each antenna according to the previously determined response order. Optionally, the above signal strength acquisition message can also carry the response order of at least two keys (the response order here can be the same as or different from the response order in the above step S110); sequentially receive the signal strengths feedback by at least two keys according to the response order. The signal strength feedback by each key includes at least three signal strengths, and each signal strength corresponds to one antenna.

[0042] Specifically, at least three antennas can sequentially send signal strength acquisition messages one by one. Each antenna sends a signal strength acquisition message to multiple keys simultaneously. The time interval between the messages sent by adjacent two antennas can be set in advance according to actual requirements. Exemplarily, refer to Figure 7After the antenna 1 sends the first signal strength acquisition message and receives the response messages of the three keys 1-3 for the first signal strength acquisition message, the antenna 2 then sends the second signal strength acquisition message; after the antenna 2 sends the second signal strength acquisition message and receives the response messages of the three keys 1-3 for the second signal strength acquisition message, the antenna 3 then sends the third signal strength acquisition message. When the antenna 3 receives the response message for the third signal strength acquisition message, the acquisition of the signal strengths of at least two keys is completed. Among them, the message sending interval between the antenna 1 and the antenna 2 and the message sending interval between the antenna 2 and the antenna 3 can be the same or different.

[0043] At least two keys, in response to receiving the signal strength acquisition messages sent by at least three antennas of the vehicle, respectively determine at least three signal strengths, where each signal strength corresponds to one antenna; determine their respective response orders according to the signal strength acquisition messages; and feedback at least three signal strengths to the vehicle according to their respective response orders.

[0044] Specifically, when each key receives the signal strength acquisition message sent by one antenna, it can parse the signal strength acquisition message to obtain the identification information. If the parsed identification information includes its own identification information, it can calculate the signal strength corresponding to the antenna according to the signal strength in the signal strength acquisition message, write the signal strength into the response message for the signal strength acquisition message, and send the response message through its own high-frequency RF module according to its own response order.

[0045] When feedbacking the signal strength, at least two keys determine their respective response delay durations according to their respective response orders; at least two keys send the response messages for the signal strength acquisition message to the vehicle after passing through their respective response delay durations.

[0046] When the high-frequency RF module of the vehicle receives the response message for the signal strength acquisition message feedback by the key, it can filter the identification information in the response message according to the identification information of the key already stored in the high-frequency RF module, and send the filtered response message to the controller of the vehicle for processing.

[0047] Step S150: Locate at least two keys according to the signal strengths of at least two keys.

[0048] Each key corresponds to at least three signal strengths, and each signal strength corresponds to one antenna. Based on the at least three signal strengths corresponding to each key, the distance between each key and the vehicle can be calculated. Since the installation positions of at least three antennas in the vehicle are known, using a preset algorithm, the position of the key can be calculated, thereby realizing the positioning of the key. Among them, the preset algorithm can be the triangulation method, which means using at least three antennas with known positions to calculate the position of an unknown key. That is, by measuring the distance from the key to each antenna, and then using the properties of a triangle (such as the Pythagorean theorem) to calculate the specific position of the key.

[0049] Based on step S140 and step S150, the response order of at least two keys is obtained through the signal strength acquisition message; so that at least two keys can sequentially feedback response messages regarding the signal strength acquisition message at different times according to the response order, thereby ensuring that at least two keys can feedback in an orderly manner and avoiding the problem of high-frequency message conflicts during the key positioning process.

[0050] In addition, referring to Figure 8 , taking the vehicle using three antennas to send signal strength acquisition messages as an example, in the related art when performing multi-key positioning, the three keys 1-3 are positioned one by one. Each time during positioning, the three antennas 1-3 sequentially send signal strength acquisition messages to one key and position the key according to the three response messages fed back by the key. According to this method in the related art, for positioning three keys, each antenna needs to send 3 signal strength acquisition messages. And referring to Figure 7 , in the present invention, after receiving the response messages fed back by the three keys 1-3, the three keys 1-3 are positioned together, and for positioning three keys, each antenna only needs to send 1 signal strength acquisition message. It can be seen that in the scenario involving at least two key positionings, steps S140 and S150 of the present invention compared with the related art (such as Figure 8 ), the number of transmissions of each antenna is less, the wake-up time of a single key is shorter, the power consumption required by the key and the antenna can be reduced, thereby improving the service life of the key and enhancing the key positioning efficiency.

[0051] Referring to Figure 9 , in some embodiments, before step S110, the multi-key search and authentication method further includes steps S210 to S240.

[0052] Step S210: Send a key learning message to at least two keys, and the key learning message is used for at least two keys to respectively extract and save their own serial numbers, where the key learning message is used for key learning and carries the serial number of the key.

[0053] Before the vehicle leaves the factory, the manufacturer generally equips the vehicle with multiple keys, such as 2-3 keys. During the subsequent use of the vehicle, other keys can also be added, such as adding a smartphone as a vehicle key.

[0054] The order of at least two keys can be sorted in advance, and the serial number of each key among the at least two keys can be determined according to the sorting result.

[0055] In some embodiments, a key learning message can be sent to at least two keys, and the key learning message carries the correspondence between the key and the serial number. For example, the correspondence "bca—>123" means that key b corresponds to serial number 1, key c corresponds to serial number 2, and key a corresponds to serial number 3. Here, a, b, and c can be the types of keys or key models or other information that can be used to distinguish at least two keys so that each key can obtain its corresponding serial number. After each key receives the key learning message, it extracts its own serial number from the key learning message and saves its own serial number. For example, after key b receives the key learning message, by parsing the key learning message, it can obtain the correspondence "bca—>123", and then it knows that its own serial number is 1 and saves serial number 1.

[0056] In other embodiments, key learning can be performed on at least two keys in sequence according to the sorting result. By way of example, assume there are three keys a, b, and c, and the sorting result of sorting the three keys a, b, and c is b, c, a. Then the serial numbers of keys b, c, and a are 1, 2, and 3 in sequence. A first key learning message can be sent to key b first. The first key learning message carries the serial number 1 of key b. After key b receives the first key learning message, it extracts and saves serial number 1. Then a second key learning message is sent to key b. The second key learning message carries the serial number 2 of key c. After key c receives the second key learning message, it extracts and saves serial number 2. Finally, a third key learning message is sent to key a. The second key learning message carries the serial number 3 of key a. After key a receives the third key learning message, it extracts and saves serial number 3.

[0057] After each key saves the serial number, it can write its own identification information and the first secret key into the response message regarding the key learning message and send the response message to the vehicle.

[0058] Step S220: Receive the response messages regarding the key learning message fed back by at least two keys in the response order, and perform verification on the at least two keys according to the received response messages.

[0059] After receiving a response message regarding the key learning message, parse the identification information and the first key from the response message; search for the second key corresponding to the identification information in the controller; verify the key with the identification information based on the first key and the second key corresponding to the identification information; if the first key and the second key corresponding to the identification information match, determine that the key corresponding to the identification information passes the verification; if the first key and the second key corresponding to the identification information do not match, determine that the key corresponding to the identification information fails the verification. Among them, the matching method of the first key and the second key is determined according to the actual key encryption method adopted, and the key encryption and decryption method may include but is not limited to the symmetric key encryption method and the symmetric non-key encryption method.

[0060] Step S230: After at least two keys pass the verification, save the identification information of the at least two keys.

[0061] After at least two keys pass the verification, the vehicle saves the corresponding relationship between the received identification information and the first key in the high-frequency RF module and the controller.

[0062] Step S240: Determine the response order of at least two keys according to the serial numbers of the at least two keys; write the response order of the at least two keys into the key search message.

[0063] Since the serial numbers of at least two keys are known, the response order can be randomly generated according to the serial numbers of at least two keys, or the response order can be generated according to the rules preset by the developer according to the serial numbers of at least two keys, so as to stipulate that at least two keys can give ordered feedback in the subsequent authentication and positioning process, thereby avoiding the problem of high-frequency message conflicts.

[0064] Based on steps S210 to S240, the response order of at least two keys can be defined according to the serial numbers of the keys, so that in the key authentication and positioning process, at least two keys can respond in an orderly manner according to the response order, avoiding the problem of high-frequency message conflicts.

[0065] Please refer to Figure 10 , Figure 10 shows the timing flowchart of the multi-key search and authentication method provided by another embodiment of the present invention. The multi-key search and authentication method is applied to the above multi-key search and authentication system. The multi-key search and authentication method includes steps S310 to S340.

[0066] Step S310: The vehicle broadcasts a key search message, and the key search message is used to search for keys and carry the response order of at least two keys.

[0067] Step S320: In response to receiving the key search message, at least two keys determine their respective response orders according to the key search message.

[0068] Step S330: At least two keys feedback response messages regarding the key search message to the vehicle according to their respective response orders.

[0069] Step S340: The vehicle authenticates at least two keys according to the response messages regarding the key search message.

[0070] For the specific descriptions of steps S310 to S340, refer to steps S110 to S130. In addition, it should be noted that in addition to performing steps S310 to S340, the multi-key search and authentication system can also be used to perform the above steps S140 to S150 and the above steps S210 to S240.

[0071] Based on steps S310 to S340, the response orders of at least two keys are specified through the key search message; such that at least two keys can feedback response messages regarding the key search message at different times in sequence according to the response orders, thereby ensuring that at least two keys can feedback in an orderly manner and avoiding the problem of high-frequency message conflicts during the key search and authentication process. In addition, after receiving the response messages of at least two keys, the at least two keys are authenticated together, enabling the at least two keys to be authenticated in the same batch without the need for each key to be authenticated separately, reducing the time required for overall authentication and improving the key authentication efficiency.

[0072] For ease of understanding, an exemplary timing flowchart is provided here to illustrate the multi-key search and authentication method. Refer to Figure 11 , the timing flowchart may include steps S410 to S4130. Among them, steps S410 to S450 are the key learning stage, steps S460 to S490 are the key search and authentication stage, and steps S4100 to S4130 are the key positioning stage.

[0073] Step S410: The vehicle sends a key learning message to the key.

[0074] Step S420: The key stores the sequence number in the received key learning message.

[0075] Step S430: The key sends a response message regarding the key learning message.

[0076] Step S440: After the vehicle receives the response message regarding the key learning message, it verifies the identification information in the response message, and stores the identification information when the verification passes.

[0077] Step S450: The vehicle determines the response order of the key according to the sequence number of the key.

[0078] Step S460: The vehicle broadcasts a key search message.

[0079] Step S470: When the key receives the key search message, it determines its own response order according to the key search message.

[0080] Step S480: The key feeds back a response message regarding the key search message to the vehicle in accordance with the response order.

[0081] Step S490: The vehicle authenticates the key based on the received response message regarding the key search message.

[0082] Step S4100: The vehicle sequentially sends signal strength acquisition messages to the key through at least three antennas.

[0083] Step S4110: Each time the key receives a signal strength acquisition message, it determines its own response order for this time through the currently received signal strength acquisition message.

[0084] Step S4120: For each received signal acquisition message, the key feeds back its own signal strength to the vehicle in accordance with the response order for that time.

[0085] Step S4130: After the vehicle receives at least three (consistent with the number of signal strength acquisition messages) signal strengths fed back by the key, it locates the key.

[0086] It should be noted that for the parts not described in detail in Steps S410 to S4130, reference can be made to the relevant parts mentioned above. Based on Steps S410 to S4130, during the key authentication and positioning process, the response order of at least two keys can be specified, so that at least two keys sequentially feed back response messages regarding the key search message at different times, thereby ensuring that at least two keys can feed back in an orderly manner and avoiding the problem of high-frequency message conflicts during the key authentication and positioning process. In addition, authenticating and positioning at least two keys enables at least two keys to be authenticated and positioned within the same batch, without the need for each key to be authenticated and positioned individually, reducing the overall time required for authentication and positioning and improving the efficiency of key authentication and positioning.

[0087] Please refer to Figure 12 , Figure 12The structural schematic diagram of the multi-key search and authentication device provided by the embodiment of the present invention is shown. The multi-key search and authentication device 200 can be applied to a vehicle. The multi-key search and authentication device 200 includes a message broadcast module 210, configured to broadcast a key search message, where the key search message is used to search for keys and carry the response order of at least two keys; a message receiving module 220, configured to sequentially receive response messages about the key search message fed back by the at least two keys according to the response order; and a key search module 230, configured to authenticate the at least two keys according to the response messages about the key search message.

[0088] In some embodiments, the multi-key search and authentication device 200 further includes a key positioning module. The key positioning module is configured to, when the at least two keys are all authenticated, obtain the signal strengths of the at least two keys according to the response order of the at least two keys; and position the at least two keys according to the signal strengths of the at least two keys.

[0089] In some embodiments, the key positioning module is further configured to send signal strength acquisition messages through at least three antennas, where the signal strength acquisition messages are used to acquire the signal strengths of the keys and carry the response order of the at least two keys; and sequentially receive the signal strengths fed back by the at least two keys according to the response order, where the signal strength fed back by each key includes at least three signal strengths, and each signal strength corresponds to one antenna.

[0090] In some embodiments, the multi-key search and authentication device 200 further includes an order determination module. The order determination module is configured to determine the response order of the at least two keys according to the serial numbers of the at least two keys; and write the response order of the at least two keys into the key search message.

[0091] In some embodiments, the multi-key search and authentication device 200 further includes a key learning module. The key learning module is configured to send key learning messages to at least two keys, so that the at least two keys respectively extract and save their own serial numbers from the received key learning messages, where the key learning messages are used for key learning and carry the serial numbers of the keys.

[0092] Those skilled in the art can clearly understand that the multi-key search and authentication device 200 provided by the embodiment of the present invention can implement the multi-key search and authentication method at the vehicle end provided by the embodiment of the present invention. For the specific working processes of the above nodes, reference can be made to the corresponding processes in the multi-key search and authentication method in the embodiment of the present invention, which will not be elaborated here.

[0093] In the embodiments provided by the present invention, the coupling, direct coupling or communication connection between the displayed or discussed modules can be indirect coupling or communication coupling through some interfaces, devices or modules, and can be in electrical, mechanical or other forms. The embodiments of the present invention do not limit this.

[0094] In addition, in the embodiments of the present invention, each functional module can be integrated into a processing module, or each module can exist physically alone, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The embodiments of the present invention do not limit this here.

[0095] Please refer to Figure 13 , Figure 13 , which shows a schematic structural diagram of a vehicle provided by an embodiment of the present invention. The vehicle 300 includes a memory 310 and a processor 320. Among them, an application program is stored in the memory 310, and the application program is used to execute the method of multi-key search and authentication on the vehicle side when called by the processor 320.

[0096] Among them, the processor 320 can include one or more processing cores. The processor 320 uses various interfaces and lines to connect various parts within the entire vehicle 300, and by running or executing instructions, programs, code sets or instruction sets stored in the memory 310, and calling data stored in the memory 310, it executes various functions of the vehicle and processes data. The processor 320 can be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 320 can integrate one or a combination of several of a central processing unit (CPU), a graphics processing unit (GPU), and a modem, etc. It can be understood that the above modem can also not be integrated into the processor 320 and can be implemented separately through a communication chip.

[0097] The memory 310 may include a Random Access Memory (RAM), or may also include a Read Only Memory (ROM). The memory 310 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 310 may include a program storage area and a data storage area. Among them, the program storage area may store instructions for implementing the operating system, instructions for implementing at least one function, instructions for implementing the above-mentioned method embodiments, etc. The data storage area may store data created during the use of the vehicle 300, etc.

[0098] An embodiment of the present invention also provides a computer-readable storage medium, in which program code is stored, and the program code is used to execute the multi-key search and authentication method at the vehicle end when called by a processor.

[0099] The computer-readable storage medium may be an electronic memory such as a flash memory, an Electrically Erasable Programmable Read Only Memory (EEPROM), an Electrical Programmable Read Only Memory (EPROM), a hard disk, or a Read Only Memory (ROM). In some embodiments, the computer-readable storage medium may include a Non-Transitory Computer-Readable Storage Medium (NTRSM). The computer-readable storage medium has a storage space for program code for executing any method step in the above methods. These program codes may be read out from or written into one or more computer program products. The program codes may be compressed in a suitable form.

[0100] The above are only the preferred embodiments of the present invention, and do not impose any formal restrictions on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, may make some modifications or equivalents by using the above-disclosed technical content. However, any brief modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-key search and authentication method, characterized in that, Comprising: A broadcast key search message, which is used to search for keys and carry the response order of at least two keys; Receiving response messages about the key search message fed back by the at least two keys in the response order; Authenticating the at least two keys according to the response messages about the key search message.

2. The multi-key search and authentication method according to claim 1, wherein The method further includes: When the at least two keys all pass the authentication, obtaining the signal strengths of the at least two keys according to the response order of the at least two keys; Locating the at least two keys according to the signal strengths of the at least two keys.

3. The multi-key search and authentication method according to claim 2, wherein, The obtaining the signal strengths of the at least two keys according to the response order of the at least two keys includes: Sending a signal strength acquisition message to the at least two keys through at least three antennas, where the signal strength acquisition message is used to acquire the signal strengths of the keys; Sequentially receiving the signal strengths fed back by the at least two keys in the response order, and the signal strength fed back by each key includes at least three signal strengths, and each signal strength corresponds to one antenna.

4. The multi-key search and authentication method according to claim 1, characterized in that, Before the broadcast key search message, the method further includes: Determining the response order of the at least two keys according to the serial numbers of the at least two keys; Writing the response order of the at least two keys into the key search message.

5. The multi-key search and authentication method according to claim 4, characterized in that, Before the determining the response order of the at least two keys according to the serial numbers of the at least two keys, the method further includes: Sending a key learning message to at least two keys, where the key learning message is used for the at least two keys to extract and save their respective serial numbers, and the key learning message is used for key learning and carries the serial numbers of the keys.

6. A multi-key search and authentication method, characterized in that, Comprising: A vehicle broadcasts a key search message, which is used to search for keys and carry the response order of at least two keys; In response to receiving the key search message, the at least two keys determine their respective response orders according to the key search message; The at least two keys feedback response messages about the key search message to the vehicle in their respective response orders; The vehicle authenticates the at least two keys according to the response messages about the key search message.

7. The multi-key search and authentication method according to claim 6, characterized in that The at least two keys feedback response messages about the key search message to the vehicle in their respective response orders, including: The at least two keys determine their respective response delay durations according to their respective response orders; After passing through their respective delay durations, the at least two keys feedback response messages about the key search message to the vehicle.

8. The multi-key search and authentication method according to claim 6, characterized in that The method further includes: In response to receiving a signal strength acquisition message sent by at least three antennas of the vehicle, the at least two keys respectively determine at least three signal strengths, where each signal strength corresponds to one antenna, and the signal strength acquisition message is used to acquire the signal strengths of the keys and carry the response order of the at least two keys; The at least two keys determine their respective response orders according to the signal strength acquisition message; The at least two keys feedback at least three signal strengths to the vehicle according to their respective response orders.

9. A multi-key search and authentication device, characterized in that, Comprising: A message broadcast module, configured to broadcast a key search message for searching for keys and carrying the response order of at least two keys; A message receiving module, configured to receive response messages of the at least two keys regarding the key search message fed back in accordance with the response order; A key search module, configured to authenticate the at least two keys according to the response messages regarding the key search message.

10. A vehicle, characterized in that, Comprising: A memory and a processor, wherein an application program is stored in the memory, and the application program is configured to execute the multi-key search and authentication method according to any one of claims 1-5 when called by the processor.

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