Wireless key anti-collision method

Abstract

According to the wireless key anti-collision method provided by the invention, the key can identify the connection state of the vehicle and the key only by adding a byte at a fixed position in the low-frequency information sent by the vehicle through resetting the program, so that the phenomenon that a plurality of keys interfere with each other is avoided, and the safety of the vehicle is improved. Compared with the improvement of hardware, the cost is greatly reduced; meanwhile, due to the fact that the key system of the user is improved, when the key is copied by an illegal person, the normal key disturbing the user cannot be used at the same time due to the system, and the safety of the key is effectively improved.

Description

Technical Field

[0001] The invention relates to a wireless key anti-collision method. Background Art

[0002] Nowadays, wireless keys for vehicles have been widely used. Due to the convenience of wireless keys, they are directly relied on by users during use. Therefore, if there is a deviation in the vehicle's response to the key command, the user has no way to change or correct it and can only rely on the key and hardware for operation.

[0003] During this process, if keys with the same frequency, such as spare keys or copied keys, appear and operate the vehicle at the same time, mutual interference is likely to occur. Two or more keys operating different function keys at the same time will cause the signals received by the vehicle computer to collide and become chaotic during transmission, which will cause the function keys of the keys to fail, and then affect the failure of certain functions of the vehicle, leaving loopholes for illegal acts such as car theft.

[0004] In the prior art, in order to avoid mutual interference between keys of the same frequency, the frequency hopping method is adopted to solve the problem, that is, to add waving hardware of different frequencies to the key. When signal collision interference occurs, resulting in function failure, it will actively jump to another frequency for waving, thereby ensuring normal use without affecting the reception of the vehicle computer.

[0005] This can solve the conflict and failure problems for conventional spare keys, but due to the hardware improvement of the key, it requires increased costs, which is not consumer-friendly. In addition, if it encounters malicious use, multi-key interference will occur and the wireless key can no longer be used, leaving criminals with opportunities to take advantage. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a wireless key anti-collision method, which uses software program to optimize operation without modifying hardware, so that the wireless key is controlled according to the LF information it receives, and when multiple keys are connected to the vehicle at the same time, an invalid response is made, thereby avoiding conflicts.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: A method for preventing wireless key conflicts, including a remote control key located within the range where low-frequency information (LF) sent by the vehicle can be received; a flag bit is stored in the low-frequency information, and the flag bit indicates a signal with a connected key or a signal without a connected key. When the vehicle is connected to the remote control key and starts to work, the flag bit indicates that there is a key connected. At this time, the low-frequency information with the flag bit is sent out and received by the remote control key. After receiving the low-frequency information, other keys, except the remote control key being operated, identify the flag bit as having a connection and do not start their own remote control system (RKE). At this time, even if the button is pressed, it will be ineffective. The said remote control key starts to enter the waiting mode, only receiving low-frequency information and not sending remote control information until the flag bit identified in the received low-frequency information indicates no connection, then the remote control system is enabled to connect to and operate the vehicle.

[0008] Further, the flag bit in the low-frequency information adopts a fixed position and is not restricted by the format of the low-frequency information.

[0009] Further, the position of the flag bit is an additional byte within the fixed position of the low-frequency information.

[0010] Further, the signal display of the flag bit is set to 0 or 1, where 1 indicates a connected key and 0 indicates no connected key.

[0011] Further, the operation process of this method is as follows: The first step is to bring the said remote control key into the range where low-frequency information is received; The second step is for the said remote control key to receive low-frequency information; The third step is for the said remote control key to interpret the low-frequency information and identify the information of the flag bit; to judge whether there is a connected key for the vehicle; The fourth step, if it is judged that there is a connection, return to the second step to wait. At this time, the said remote control key is in a silent state, does not start the remote control system, and does not send remote control information; The fifth step, if it is judged that there is no connection, connect to the receiver of the vehicle, enable the remote control system, and perform button operations.

[0012] Compared with the prior art, a method for preventing wireless key conflicts provided by the present invention, through re-setting the program, only needs to add a byte at a fixed position in the low-frequency information sent by the vehicle, so that the key can identify the connection state between the vehicle and the key, thus avoiding the phenomenon of multiple keys interfering with each other, and greatly reducing the cost used compared with the improvement of hardware; at the same time, because the improved is the user's own key system, when the key is illegally copied by others, it will also be unable to be used simultaneously due to the system, interfering with the normal use of the user's key, effectively improving the security of the key. Description of the Drawings

[0013] Appendix Figure 1 The system schematic diagram of the present invention is shown.

[0014] Appendix Figure 2 The operation flow chart of the present invention is shown.

[0015] Appendix Figure 3 The low-frequency information schematic diagram of the present invention is shown. Detailed implementation manners

[0016] In one embodiment, as Figure 1 shown, a method for preventing collision of wireless keys, a method for preventing collision of wireless keys, includes a remote control key located within a range where low-frequency information (LF) sent by a vehicle can be received; a flag bit is stored in the low-frequency information, and the flag bit indicates a signal of a connected key or a signal of no connected key. When the vehicle is connected to the remote control key and starts to work, the flag bit indicates that there is a key connection. At this time, the low-frequency information with the flag bit is sent out and received by the remote control key. After receiving the low-frequency information, other keys except the remote control key being operated identify the flag bit as having a connection and do not start their own remote control systems (RKE). At this time, even if the button is pressed, it will be ineffective. The remote control key starts to enter a waiting mode, only receives low-frequency information by itself, and does not send remote control information until the flag bit identified in the received low-frequency information indicates no connection, then the remote control system is turned on to connect to and operate the vehicle.

[0017] In one embodiment, further, the flag bit in the low-frequency information adopts a fixed position and is not restricted by the format of the low-frequency information; the position of the flag bit is an additional byte within the fixed position of the low-frequency information; the signal display of the flag bit is set to 0 or 1, where 1 indicates a key connection and 0 indicates no key connection.

[0018] In one embodiment, as Figure 2 shown, the operation flow of this method is as follows: First step, bring the remote control key into the range where low-frequency information is received; Second step, the remote control key receives the low-frequency information; Third step, the remote control key interprets the low-frequency information and identifies the information of the flag bit; determine whether there is a connected key for the vehicle; Fourth step, if it is determined that there is a connection, return to the second step to wait. At this time, the remote control key is in a silent state, does not start the remote control system, and does not send remote control information; Fifth step, if it is determined that there is no connection, connect to the receiver of the vehicle, turn on the remote control system, and perform button operations.

[0019] The method of the present invention can effectively prevent the mutual conflict of multiple keys, without the need to modify the keys and the hardware facilities of the vehicle, and can be compatible with existing vehicles, with convenient operation and outstanding effects.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than restrictive technical solutions. Those skilled in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention without departing from the purpose and scope of the present technical solution shall be covered within the scope of the claims of the present invention.

Claims

1. A wireless key anti-collision method, characterized in that: The invention comprises a remote control key, which is located within a range where low frequency information (LF) sent by a vehicle can be received; a flag is stored in the low frequency information, and the flag displays a signal that a key is connected or not connected. When the vehicle is connected to the remote control key and starts to work, the flag displays that a key is connected. At this time, the low frequency information with the flag is sent out and received by the remote control key. Except for the remote control key being operated, other keys, after receiving the low frequency information, recognize that the flag is connected, and do not start their own remote control system (RKE). At this time, even if the key is pressed, it will fail, and the remote control key begins to enter a waiting mode, only receiving low frequency information and not sending out remote control information, until the flag in the received low frequency information is recognized as not connected, then the remote control system is started to connect and operate the vehicle.

2. A wireless key anti-collision method according to claim 1, characterized in that: The flag bit in the low-frequency information adopts a fixed position and is not restricted by the format of the low-frequency information.

3. A wireless key anti-collision method according to claim 1, characterized in that: The position of the flag bit is a byte added to the fixed position of the low-frequency information.

4. A wireless key anti-collision method according to claim 1, characterized in that: The signal display of the flag bit is set to 0 or 1, 1 means there is a key connection, and 0 means there is no key connection.

5. A wireless key anti-collision method according to claim 1, characterized in that: The operation process of this method is as follows: The first step is to bring the remote control key into the range of receiving low-frequency information; Step 2, the remote control key receives low frequency information; In the third step, the remote control key interprets the low-frequency information and identifies the information of the flag position; and determines whether the vehicle has a connected key; Step 4: If it is determined that there is a connection, return to step 2 to wait, at which time the remote control key is in a silent state, the remote control system is not started, and no remote control information is sent; Step 5. If it is determined that there is no connection, connect to the vehicle's receiver, turn on the remote control system, and perform key operations.

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