KR20010027842A - Method for key-less entry into automobile - Google Patents

Abstract

The present invention relates to a keyless entry method of a vehicle, wherein a transmitter generates a count code according to the number of operations of each function key and substitutes the count code into a random code generation algorithm to generate a discontinuous, irregular, or random rolling code. The keyless entry code including the generated random rolling code and the count code is transmitted to the receiver. The receiver receives the keyless entry code transmitted from the transmitter, generates a rolling code by substituting the double count code into the same random code generation algorithm as the transmitter, and matches the generated rolling code with the received rolling code. Authenticate code.

Since the rolling code changes discontinuously and irregularly every time a key is operated, the security is remarkably improved compared to the conventional case in which the value of the rolling code is continuously increased at every key operation.

Description

Keyless entry method of vehicle {METHOD FOR KEY-LESS ENTRY INTO AUTOMOBILE}

The present invention relates to a keyless entry method of a vehicle, and more particularly, to a keyless entry method of a vehicle capable of significantly improving security.

In general, the keyless entry device is a device for locking or releasing the door of a vehicle without a key. When such a keyless entry device inputs a keyword through a key input unit and the entered keyword matches a preset value, The keyword input method for locking or unlocking the door and the keyless entry code sent by the driver from the transmitter are input to the receiver of the vehicle to check the preset keyless entry code. There is a code transmission / reception method to unlock.

As shown in FIG. 1, the dual code transmission / reception type keyless entry device converts a keyless entry code into a predetermined radio signal (for example, a radio frequency pulse) according to a driver's key operation. A control signal for locking or unlocking the door D or a control signal for opening the trunk door TD of the trunk door T according to the transmitter 10 to transmit and the keyless entry code transmitted from the transmitter 10. A plurality of door locking devices 30 for locking or releasing the door D by a control signal from the receiver 20 and a control signal from the receiver 20 It consists of a trunk locking device 40 for opening the door (TD).

Herein, the keyless entry code may be identified by referring to Table 1 below. An identification code (“ID code”) and a transmitter 10 which are set in advance on the transmitter 10 and the receiver 10 side. It is composed of a combination of a rolling code that changes each time the operator operates and a function code corresponding to the function selected by the driver by operating a key.

[Conventional Keyless Entry Code] ID Code Rolling cord Function code

The rolling code is changed in a form in which the value is sequentially increased every time a key is operated on the transmitter side (for example, in the case of an 8-bit binary code, 00000001 (key operation first) → 00000010 (key) The second operation) → 00000011 (the third operation of the key operation) → 00000100 (the fourth operation of the key operation), and on the receiver side, the rolling code value received from the transmitter side is compared with the rolling code previously received. If it is within the setting range among the values sequentially increased from the value of the rolling code previously received, the transmitter authenticates that there is no abnormality in the received keyless entry code.

For example, if the rolling code value previously received is the value generated when the key is operated the 50th time, the next rolling code value received is set to "51+" from the value generated when the key is operated the 51st time. If the value is within the range of the value generated in the "th value" (eg 256), the received keyless entry code is authenticated.

As described above, allowing a set value (e.g., 256 times) in checking the rolling code is an unreceivable area or an unreceivable area where the transmitted keyless entry code from the transmitter 10 is not received by the transmitter 20 side. When the transmitter 10 is operated several times in the state, the rolling code on the transmitter 10 side continuously increases, but the rolling code stored on the receiver 20 side does not increase, so that the transmitter 10 can be transmitted and received later. This is to prevent a case where the keyless entry code sent from the receiver 20 does not authenticate.

However, in this case, the problem is that the driver operates the transmitter 10 in excess of a set value (for example, 256) in a state where transmission and reception between the transmitter 10 and the receiver 20 are not performed or the receiver 20 If the rolling code of the received reception is erased due to a problem on the side, the receiver does not authenticate the keyless entry code from the transmitter 10. To prevent this, the rolling code received from the receiver 20 Even if it is out of the setting range, if a continuous rolling code is received for a predetermined number of times (for example, about three times), the keyless entry code is authenticated.

However, as described above, the conventional keyless entry apparatus authenticates the keyless entry code if the ID code matches and the rolling code received for a predetermined number of times is a continuous value. There was a problem in that the vehicle could be easily released by transmitting a rolling code of the value.

Therefore, the present invention has been made to solve the problems of the prior art as described above, by determining the authenticity of the keyless entry code by a rolling code generated randomly out of sequence every time a key is operated, The purpose of the present invention is to provide a keyless entry method of a vehicle that can significantly improve the performance of the vehicle.

1 is a schematic view showing a keyless entry device of a typical vehicle;

2 is a schematic block diagram of hardware for carrying out the present invention;

3 is a flowchart illustrating a keyless entry method of a vehicle according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

100: transmitter 110: key control unit

120, 220: storage unit 130: 230: control unit

140: transmitter 200: transmitter

210: receiver

Keyless entry method of a vehicle according to the present invention for achieving the above object, in the keyless entry method of the vehicle to determine the authenticity of the keyless entry code by matching the rolling code contained in the keyless entry code transmitted from the transmitter to the receiver side On the transmitter side, the operation number for each function key is substituted with a predetermined random code generation algorithm to generate a rolling code of a random value. On the receiver side, the operation number for each function key on the transmitter side is applied to the same random code generation algorithm as the transmitter side. And a rolling code is generated to compare the generated rolling code with the rolling code transmitted from the transmitter to determine the authenticity of the keyless entry code.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic block diagram of hardware for carrying out the present invention. As can be seen from the drawings, the hardware for carrying out the present invention includes a transmitter 100 and a transmitter 100 for generating a keyless entry code. The receiver 200 generates a control signal for locking or releasing the door of the vehicle or a control signal for opening the trunk door according to the keyless entry code.

The transmitter 100 includes a function key for locking or releasing the door of the vehicle and a function key for opening the trunk door, and when the driver operates the key, the key operation unit 110 generates a corresponding key signal. And a storage unit 120 which stores a predetermined random code generation algorithm and stores a predetermined ID code and key operation number of each function key of the key operation unit 110, key signals generated by the key operation unit and the storage unit. The controller 130 generates a keyless entry code according to the random code generation algorithm stored in the 120 and the number of key operations for each function key, and the keyless entry code generated by the controller 130 is a predetermined radio signal (e.g., For example, the transmitter 140 includes a transmitter 140 modulating and transmitting a radio frequency pulse.

The receiver 210 receives the keyless entry code in the form of a wireless signal transmitted from the transmitter 140 of the transmitter and demodulates the keyless entry code in the original wired form, and the same random code generation algorithm as the storage unit 120 of the transmitter. And a storage unit 220 storing a preset ID code, and a keyless entry code received through the receiving unit 210 in accordance with a random code generation algorithm stored in the storage unit 220 and an ID code. The controller 230 generates a control signal for locking or releasing the door of the vehicle or a control signal for opening the trunk door according to whether the authentication is performed and the function code included in the keyless entry code.

An operation example of the present invention configured as described above will be described in detail with reference to FIGS. 2 and 3.

First, when a driver manipulates a function key included in the key operation unit 110 of the transmitter, a corresponding key signal is generated from the key operation unit 110 and applied to the control unit 130 (S10). The number of operations for each function key is counted by the key signal from the key operation unit 110, and the storage unit 120 stores the counted number of operations for each function key (S20).

Next, the controller 130 generates a count code corresponding to the counted number of operations for each function key (S30). For example, in the case of the third time of the locking key operation-the second time of the unlocking key operation-the first time of the trunk opening key operation, the count code is in the form of "00000011-00000010-00000001" (where the code structure is 8-bit unit 2). For example, binary code).

Thereafter, the controller 130 loads the random code generation algorithm from the storage unit 120 into the built-in main memory and substitutes the count code generated in the step S30 into the random code generation algorithm to generate a rolling code. S40).

Here, according to the random code generation algorithm, a rolling code of a random value that is not continuous and unrelated to the rolling code of the previous value is generated according to the inserted count code. For example, the rolling code generated when the count code was "00000000" is not contiguous with the rolling code generated when the count code was "00000001" and has no correlation with each other.

However, the random code generation algorithm uses the same output value when the input value is the same so that the same rolling code is generated when the same count code is repeatedly input. For reference, in a form of a random code generation algorithm having the same output value for the same input value as described above, the random number table is substituted by inserting a count code, which is an input value, into a random number table stored in a memory device. You can get the rolling code from the output.

Then, the control unit 130 and the ID code preset in the storage unit 120, the count code generated in the step (S30) and the rolling code generated in the step (S40) and as shown in Table 2 below The driver manipulates the key operation unit 110 to generate a keyless entry code by combining function codes corresponding to the selected function, and the keyless entry code generated by the control unit 130 is modulated into a wireless signal form through the transmission unit 140. And is transmitted (S50).

[Keyless Entry Code of the Present Invention] ID Code Count code Rolling cord Function code

The keyless entry code in the form of a wireless signal transmitted from the transmitter 140 of the transmitter is received by the receiver 210 of the receiver 200 and demodulated to the keyless entry code of the original wire form (S60).

The keyless entry code demodulated by the reception unit 210 is input to the control unit 230, and the control unit 230 compares the received ID code among the received keyless entry codes with the ID code stored in the storage unit 220 ( S70), the determination result determines whether both ID codes are matched (S80), if the received ID code and the ID code stored in the storage unit 220 does not match with each other, rejects the authentication of the keyless entry code and all control End the operation.

If the ID code received as a result of the determination in step S80 and the ID code stored in the storage unit 220 coincide with each other, the controller 230 may include a random code generation algorithm built from the storage unit 220. A rolling code is generated by loading into a memory and substituting a count code among the received keyless entry codes into the random code generation algorithm (S90).

Then, the controller 230 checks the rolling code generated in the step S90 with the rolling code in the received keyless entry code (S100), and determines whether the rolling code generated as a result of the matching matches the received rolling code. In operation S110, if the generated rolling code and the received rolling code do not match, the authentication of the keyless entry code is rejected and all control operations are terminated.

If the rolling code generated as a result of the determination in step S110 coincides with the received rolling code, the controller 230 authenticates the received keyless entry code and the vehicle according to the function code included in the authenticated keyless entry code. Generates a control signal for locking or releasing the door of the door or a control signal for opening the trunk door and outputs the control signal to the door locking device or the trunk locking device, and according to the control signal from the control unit 230, the door locking device or the trunk. The locking device is operated so that the door is locked or unlocked or the trunk door is opened (S120).

As described above, the random code generation algorithm stored in the storage unit 120 on the transmitter side and the random code generation algorithm stored in the storage unit 220 on the receiver side are the same, and the random code generation algorithm has the same input value. In this case, since the output values are the same, when the count codes are the same, the values of the rolling codes on the transmitter 100 and the receiver 200 obtained by substituting the count codes into the random code generation algorithm are the same. The authenticity of the keyless entry code is determined by checking the rolling code.

That is, the present invention uses a non-consecutive random rolling code obtained by substituting a random code algorithm with a count code according to the number of operations for each function key, rather than a rolling code that sequentially increases with the number of key operations. By determining the authenticity, the security is greatly improved.

As described above, according to the present invention, since the rolling code of the keyless entry code is changed discontinuously and irregularly every key operation, the security of the keyless entry device can be significantly improved.

Claims (3)

In the keyless entry method of a vehicle for determining the authenticity of the keyless entry code by matching the rolling code included in the keyless entry code transmitted from the transmitter to the receiver, On the transmitter side, the operation number of each function key is substituted into a predetermined random code generation algorithm to generate a rolling code of a random value. On the receiver side, the operation number of each function key on the transmitter side is substituted into the same random code generation algorithm as the transmitter side. Generating a rolling code and comparing the generated rolling code with the rolling code transmitted from the transmitter to determine the authenticity of the keyless entry code, wherein the random code generation algorithm has the same output value for the same input value. Keyless entry method of vehicle to use. 2. The keyless entry method of a vehicle according to claim 1, wherein the receiver recognizes the number of operations for each function key of the transmitter by a count code separately transmitted from the transmitter. In the keyless entry method of a vehicle, Counting the number of key operations for each function key on the transmitter side; Generating a count code corresponding to the counted number of key operations for each function key; Generating a random rolling code by substituting the generated count code into a predetermined random code generation algorithm; Generating and sending a keyless entry code, which is a combination of a preset ID code, the generated count code, a rolling code, and a function code corresponding to a user-operated function key; Receiving a keyless entry code sent from the transmitter through a receiver; Checking an ID code among the received keyless entry codes with a preset ID code; Generating a rolling code by substituting the received count code into the same random code generation algorithm as the receiver if the ID codes match; Comparing the generated rolling code with the received rolling code; And a step of performing a function according to the received function code if the rolling codes match.