JP2007132085A - Electronic key system and communication unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To hardly cause a situation in which an exclusive communication terminal is separately prepared even if constituting a system to permit or execute various vehicle operations by carrying out radiocommunication with vehicle side communication equipment using a communication terminal other than a portable unit when there is no portable unit at hand, for instance. <P>SOLUTION: A vehicle 1 is equipped with a smart entry start system 1a permitting door lock locking/unlocking and engine starting when ID collation by radio is established between itself and the portable unit 2. If a cellphone 18 with a built-in communication circuit 19 corresponding to Felica (R) is held up to an interior antenna 22 to establish ID collation with a reader-writer 17, a main controller 20 transmits a vehicle key ID code signal Sid from an RF transmitter 39 in place of the cellphone 2. A smart ECU 3 performs ID collation upon receiving the vehicle key ID code signal Sid by an RF receiver 10, and permits door lock locking/unlocking and engine starting if the ID collation is established. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic key system and a communication unit that perform authentication between a vehicle key and a vehicle by various wireless communications to permit or execute various operations of the vehicle.

In recent years, as shown in Patent Literature 1, electronic key systems that exchange signals by wireless communication between a vehicle key and a vehicle and permit or execute various operations of the vehicle such as door locking / unlocking and engine starting have been widely used. It is popular. As one type of this electronic key system, there is a smart entry start system for the purpose of improving the convenience of vehicle operation. In this smart entry start system, a portable device responds to a request signal transmitted from the vehicle and returns its own ID code. If this ID code matches the ID code stored in the vehicle in advance, the door This is a system that permits locking and unlocking and engine starting.
JP 2005-83011 A

  By the way, the vehicle key (portable machine) includes a main key that is normally used and a spare sub key. Normally, the subkey has a built-in transponder for the purpose of preventing vehicle theft, so the subkey and the main key are equivalent keys in terms of security performance. Therefore, only the main key is usually carried around, but for example, if the main key is lost and it is not at hand, the user cannot get on the vehicle and start the engine unless the sub key is returned. Was very inconvenient.

  The object of the present invention is, for example, when there is no portable device at hand, even if it is configured to allow or execute various vehicle operations by performing wireless communication with a communication device on the vehicle side using a communication terminal other than the portable device. It is an object to provide an electronic key system and a communication unit that are unlikely to have a situation in which a communication terminal is separately prepared.

  In order to solve the above problem, when the portable device receives a reply request transmitted wirelessly by the transmission antenna on the vehicle side, the portable device replies wirelessly with the first identification code of the portable device, and the vehicle transmits the first identification code. When one identification code is received by the receiving antenna, the control unit that controls various vehicle operations of the vehicle collates the first identification code on the portable device side with the first identification code on the vehicle side, and the collation is established. Then, in the electronic key system for permitting or executing the various operations of the vehicle, multi-purpose data for each application is managed in its own memory, and a plurality of wireless communication to be performed with the wireless communication target in units of each application. When the second identification code provided in the vehicle and the communication terminal that can be implemented with the wireless communication target and transmitted by the communication terminal via the wireless communication is received by its communication antenna, A collating means for collating the two identification codes with the second identification code on the vehicle side, and provided in the vehicle, when the collation of the second identification code by the collating means is established, instead of the portable device, The gist is provided with control means for outputting the code data of the first identification code to the control unit and establishing verification of the first identification code by the control unit.

  According to this configuration, the portable device is often positioned as a master key, and the function of receiving the reply request from the vehicle and transmitting the first identification code is a function added only to the portable device that is the master key. There are often. Therefore, when there is no portable device at hand, the vehicle key and the first identification code between the vehicles cannot be collated. For example, various vehicle operations such as locking / unlocking the door lock or allowing the engine to start are executed. It becomes a situation that can not be.

  Therefore, in this example, a communication terminal that transmits a unique second identification code is prepared, and the vehicle that is to be operated by the communication terminal is collated with the communication terminal by wireless communication with the communication terminal. Means and control means for returning a first identification code (code data) instead of the portable device are mounted on the vehicle. When the second identification code matches between the communication terminal and the communication device and collation is established, code data including the first identification code is output from the control means to the control unit, and various vehicles by the control unit The action is allowed or executed. For this reason, even if the portable device is not at hand, it is possible to permit or execute various vehicle operations as long as the user possesses the communication terminal in which the second identification code that is the key ID is registered.

  In addition, the communication terminal used in the present invention has a function capable of realizing wireless communication with a plurality of wireless communication objects by itself, that is, a single card can satisfy a plurality of card functions. In order to use a communication terminal as a wallet, a ticket, an entrance / exit card, etc., the user often owns this communication terminal in advance. Therefore, in the present invention, since the second identification code for the vehicle is registered in the communication terminal and used as the vehicle key, it is difficult to separately prepare a vehicle key substitute terminal.

  According to the present invention, the communication method of the wireless communication is such that when the communication terminal is held over the communication antenna that transmits a drive radio wave, the communication terminal is activated by the drive radio wave and communication is performed with the communication device. At the time of the communication, communication is performed by symmetric communication that does not use a subcarrier between the communication terminal and the communication device, and an encryption key is exchanged every time data is exchanged between the communication terminal and the communication device. The gist of the present invention is that the encrypted communication to be changed is used, and mutual authentication is performed in which different random numbers are generated between the communication terminal and the communication device, and each of them confirms the random number match.

  According to this configuration, the communication between the communication terminal and the communication device uses a method with a very high communication speed called symmetric communication, so that the communication between the communication terminal and the communication device can be performed at a very high speed. Become. In addition, since encrypted communication with high confidentiality is used for communication between the communication terminal and the communication device, and mutual authentication for confirming random number matching is used in each of the communication terminal and the communication device, communication between the communication terminal and the communication device is performed. It is also possible to make the security level extremely high.

  According to the present invention, one communication antenna that communicates with the communication terminal is installed in the vehicle, and the verification means includes the second identification code of the communication terminal received by the communication antenna, The vehicle-side second identification code that is matched and determined that collation is established, a collation establishment signal is output to the control means, and the control means inputs the collation establishment signal from the collation means, The gist of the invention is to output the code data including the first identification code to the control unit to allow or execute door lock / unlock of the control unit.

  According to this configuration, if the communication terminal carried by the operator communicates with the verification means via the communication antenna, and the verification of the second identification code is established between the communication terminal and the verification means by this communication, the door lock Can be locked and unlocked.

  According to the present invention, communication is provided in the vehicle as a place for placing the communication terminal, and when the communication terminal is placed, a communication terminal placement signal for notifying the fact is output to the control means. Terminal placement detection means, and when the control means inputs the verification establishment signal from the verification means and inputs the communication terminal placement signal from the communication terminal placement detection means, the first identification code is obtained. The gist of the invention is to output the included code data to the control unit and allow the control unit to start the engine.

  According to this configuration, the communication antenna is shared both when the door is locked and unlocked with the communication terminal and when the engine is allowed to start, so there is no need to prepare separate antennas for each, and the number of parts can be reduced. Effective in reducing component costs.

  According to the present invention, it is provided with a getting-off detecting means for detecting that the vehicle occupant has got off, and a notifying means capable of notifying the occupant, wherein the control means is based on a detection signal of the getting-off detecting means. When it is determined that the occupant has got off the vehicle and the communication terminal is determined not to be placed at the placement location based on the communication terminal placement signal, the notification means notifies the fact. To do.

  According to this configuration, when the driver opens the door in order to get off, if the communication terminal is not placed at the placement place, the notification means notifies that fact, so the communication terminal is left behind in the vehicle. In addition, it is difficult for passengers to carry out communication terminals without permission.

The gist of the present invention is that it comprises transmission means for wirelessly transmitting the code data generated by the control means to the control unit.
According to this configuration, since the communication when the control means outputs the code data to the control unit is wireless, problems such as tangling of the wiring and trouble of wiring connection that may occur when the communication is wired do not occur. Furthermore, it is effective in improving the degree of freedom of arrangement of the control unit and the control means.

The gist of the present invention is that the communication unit including the communication terminal, the verification unit, and the control unit is a retrofit that can be attached to the vehicle as necessary.
According to this configuration, the communication unit including the communication terminal, the verification unit, and the control unit can be retrofitted to the vehicle. Therefore, if the verification of the identification code is established between the communication terminal and the verification unit, the main key is not used. A function that allows or executes various operations of the vehicle can be appropriately provided in the vehicle as necessary.

  According to the present invention, the transmission antenna is an out-of-vehicle transmission antenna that receives the in-vehicle transmission data for generating a reply request from the control unit, generates the reply request, and transmits it to the outside of the vehicle, and the control means Captures the external transmission data wirelessly from the external transmission antenna, generates the code data using the external transmission data as the reply request, outputs the code data to the control unit, and outputs the code data to the control unit. The gist is to permit or execute the locking and unlocking of the lock.

  According to this configuration, when the control means generates the code data, the vehicle transmission data is taken from the control unit, and the code data is generated using the vehicle transmission data and its first identification code. At this time, since the communication when the control unit outputs the transmission data for the outside of the vehicle to the control means is wireless, problems such as entanglement of wiring that can occur when this communication is wired and trouble of wiring connection work do not occur. Furthermore, it contributes to an improvement in the degree of freedom of arrangement of the control unit and the control means.

  According to the present invention, the transmission antenna is an in-vehicle transmission antenna that inputs in-vehicle transmission data for generating a response request from the control unit, generates the response request, and transmits the response request into the vehicle, and the control means Takes in the in-vehicle transmission data from the in-vehicle transmission antenna, generates the code data by regarding the in-vehicle transmission data as the reply request, outputs the code data to the control unit, and outputs the code data to the control unit. The gist is to allow starting.

  According to this configuration, when the control means generates the code data, the in-vehicle transmission data is fetched from the control unit, and the code data is generated using the in-vehicle transmission data and the first identification code of its own. At this time, since the communication when the control unit outputs the in-vehicle transmission data to the control means is wireless, problems such as entanglement of wiring that can occur when this communication is wired and trouble of wiring connection work do not occur. Furthermore, it contributes to an improvement in the degree of freedom of arrangement of the control unit and the control means.

  According to the present invention, when the portable device receives a reply request that is transmitted wirelessly by the transmission antenna on the vehicle side, the portable device replies wirelessly with the first identification code held by the portable device, and the vehicle transmits the first identification code. Is received by the receiving antenna, the control unit that controls various vehicle operations of the vehicle collates the first identification code on the portable device side with the first identification code on the vehicle side, and if the collation is established, It is a communication unit that can be retrofitted to the vehicle to permit or execute various vehicle operations, in which multipurpose data for each application is managed in its own memory, and wireless communication to be performed with a wireless communication target in units of each application When a plurality of communication terminals that can be implemented and a communication terminal that can be implemented and a second identification code that is provided in the vehicle and that is transmitted by the communication terminal via the wireless communication are received by its communication antenna, A collating means for collating the second identification code on the vehicle side with the second identification code on the vehicle side, and provided in the vehicle, when collation of the second identification code by the collating means is established, instead of the portable device The gist is provided with control means for outputting the code data of the first identification code to the control unit and establishing verification of the first identification code by the control unit.

  According to the present invention, for example, when there is no portable device at hand, even if it is configured to allow or execute various vehicle operations by performing wireless communication with a communication device on the vehicle side using a communication terminal other than the portable device, It is possible to make it difficult to create a situation where a separate communication terminal is prepared.

(First embodiment)
Hereinafter, a first embodiment of an electronic key system and a communication unit embodying the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the vehicle 1 is equipped with a smart entry / start system 1a for the purpose of locking / unlocking the door lock and improving the convenience of starting the engine. In the smart entry start system 1a, when the portable device 2 which is a vehicle key receives a request signal Srq transmitted from the vehicle 1, a vehicle key ID code signal Sid on which the vehicle key ID code is loaded in response thereto. , And the door is locked and unlocked and the engine is started on the condition that the ID code matches the vehicle key ID code of the vehicle and collation is established.

  The vehicle 1 is equipped with a smart ECU (Electronic Control Unit: the same applies hereinafter) 3 that performs ID collation with the portable device 2 through wireless communication. The smart ECU 3 controls the door ECU 4 that controls the locking and unlocking of the door lock, the immobilizer ECU 5 that performs ID verification of the transponder 2a when the transponder 2a is embedded in the portable device 2, and the power system of the vehicle electrical components A power supply ECU 6 is connected via a bus 7. The smart ECU 3 corresponds to a control unit.

  Connected to the smart ECU 3 are an in-vehicle LF transmitter 8 and an in-vehicle LF transmitter 9 capable of transmitting signals in the LF band. A plurality of vehicle exterior LF transmitters 8 are installed, for example, for each door, and generate a request signal Srq based on vehicle exterior LF transmission data (vehicle exterior transmission data) input from the smart ECU 3 and transmit the request signal Srq outside the vehicle. For example, two in-vehicle LF transmitters 9 are installed in the vehicle, and generate a request signal Srq based on in-vehicle LF transmission data (in-vehicle transmission data) input from the smart ECU 3 and transmit the request signal Srq. The in-vehicle LF transmission data and the in-vehicle LF transmission data are data uniquely determined for each transmitter, and are used when the request signal Srq is generated.

  An RF receiver 10 is connected to the smart ECU 3 to receive a vehicle key ID code output from the portable device 2 as an RF band signal. One RF receiver 10 is installed in the vehicle 1 and is embedded in, for example, a rearview mirror. The in-vehicle LF transmitter 8 constitutes a transmission antenna (out-vehicle transmission antenna), and the in-vehicle LF transmitter 9 constitutes a transmission antenna (in-vehicle transmission antenna).

  When the vehicle 1 is parked (push switch off, door fully closed and door lock locked), the smart ECU 3 intermittently transmits a request signal Srq from the antenna 8a of the vehicle exterior LF transmitter 8 to the outside of the vehicle. When the owner of the portable device 2 enters the communication area of the external LF transmitter 8 and the portable device 2 receives the request signal Srq, the portable device 2 responds to the vehicle key ID with its own vehicle key ID code on it. The code signal Sid is returned as an RF band signal.

  When the smart ECU 3 receives the vehicle key ID code signal Sid by the antenna 10a of the RF receiver 10, the smart ECU 3 compares the vehicle key ID code with the vehicle key ID code registered in its own memory 3a to verify the ID ( (External vehicle verification). The smart ECU 3 activates the door lock release touch sensor 11 embedded in the door handle knob and puts it into the unlock standby state when the vehicle exterior verification is established. The smart ECU 3 outputs a door unlock request signal to the door ECU 4 when the touch sensor 11 in the unlock standby state detects a contact operation to the door handle knob. When the door ECU 4 inputs the door unlock request signal, the door ECU 4 drives the door lock motor 4a to release the door lock.

  On the other hand, when the smart ECU 3 detects the pressing operation of the lock button 12 of the handle knob, the outside LF transmitter 8 forms a communication area and performs outside vehicle collation. If the outside vehicle collation is established, the smart ECU 3 sends a door lock request signal to the door. It outputs to ECU4. When the door ECU 4 inputs the door lock request signal, the door ECU 4 drives the door lock motor 4a to lock the door lock.

  A push-type push switch 14 that is operated when the engine 13 is started is connected to the power supply ECU 6. An ACC relay 15a, an IG relay 15b, and a starter relay 15c are connected to the power supply ECU 6. The door ECU 4 is connected to a courtesy switch 16 that detects an opening / closing operation of the door. An engine ECU 17 that performs ignition control and fuel injection control of the engine 13 is connected to the immobilizer ECU 5 and the power supply ECU 6. The immobilizer ECU 5 is connected to an immobilizer antenna 5a that performs ID verification with the transponder 2a. The courtesy switch 16 corresponds to the getting-off detection means.

  When the smart ECU 3 recognizes that the door has been opened based on the door opening / closing signal from the courtesy switch 16, the smart ECU 3 receives the request signal Srq from the antenna 9a of the in-vehicle LF transmitter 9 instead of the out-of-vehicle LF transmitter 8. Transmit intermittently. The smart ECU 3 receives the vehicle key ID code signal Sid returned from the portable device 2 in response to the request signal Srq by the RF receiver 10 and verifies the vehicle key ID codes of the vehicle 1 and the portable device 2. ID verification (in-vehicle verification) is repeatedly performed at intervals until the engine 13 starts to start.

  When the push switch 14 is pushed while depressing the brake pedal, the power supply ECU 6 is activated, and the activated power supply ECU 6 confirms the ID verification result with respect to the immobilizer ECU 5. The immobilizer ECU 5 that has received this request confirms the ID verification result of the in-vehicle verification with the smart ECU 3. When the immobilizer ECU 5 receives a notification from the smart ECU 3 that the in-vehicle collation has been established, the immobilizer ECU 5 responds to the power supply ECU 6 with the in-vehicle collation establishment notification. When the power supply ECU 6 receives a response for establishment of in-vehicle verification from the immobilizer ECU 5, the power supply ECU 6 turns on the ACC relay 15a and the IG relay 15b.

  The power supply ECU 6 that turns on each relay outputs an activation signal to the engine ECU 17. The engine ECU 17 that has input this activation signal performs activation permission communication (encrypted communication) with the immobilizer ECU 5 and enters an engine start permission state when receiving a notification of in-vehicle verification from the immobilizer ECU 5. The engine ECU 17 in this state turns on the starter relay 15c and rotates the starter motor, starts engine ignition control and fuel injection control, and starts the engine 13.

  When the power supply ECU 6 confirms the ID result verification with respect to the immobilizer ECU 5, if the in-vehicle verification is not established (for example, when the battery of the portable device 2 is dead), the in-vehicle verification is performed instead of the in-vehicle verification. You may make it perform ID collation (Imobi collation) which compares the transponder 2a and the transponder code of a vehicle. In this case, the engine start is permitted if immobilizer verification is established. In addition, permission to start the engine may be made on condition that both in-vehicle verification and immobility verification are established.

  The vehicle 1 is equipped with a non-contact IC card communication system (hereinafter simply referred to as a communication system) 18 using a non-contact IC card communication technique called Felica (R). The communication system 18 is a system that can use an IC card as a wallet or a boarding ticket to complete settlement of accounts, or can use an IC card as an employee ID card or student ID card for entrance / exit management. The main features of the communication system 18 are high security that is difficult to counterfeit and tamper with, high-speed processing of data transmission / reception, the IC card itself can be reused many times, and a variety of applications that can be used multiple times with one IC card There are advantages. The communication system 18 is a retrofit item for the vehicle 1 and is separately added to the vehicle 1 according to the user's use. The communication system 18 corresponds to a communication unit.

  The communication system 18 includes a reader / writer 19 attached to the vehicle 1, a main controller 20 electrically connected to the reader / writer 19, and a communication circuit (IC card) 22 built in the mobile phone 21. The reader / writer 19 corresponds to a verification unit, the main controller 20 corresponds to a control unit, and the communication circuit 22 corresponds to a communication terminal.

  The reader / writer 19 and the communication circuit 22 can perform wireless communication using a communication system compliant with the ISO / IEC 18092 standard. The wireless communication system of this standard employs symmetrical communication that employs the same encoding / modulation system for communication from the reader / writer 19 to the communication circuit 22 and for communication from the communication circuit 22 to the reader / writer 19. The wireless communication system of this standard is 13.56 MHz carrier wave, the communication speed is 212 kbps, the subcarrier is “none”, the encoding system is the Manchester system, and the collision detection / avoidance is the time slot communication.

  The reader / writer 19 includes a communication controller (control board) 23 that controls the reader / writer 19 and a transmission / reception antenna 24 connected to the communication controller 23. The communication controller 23 is disposed below the driver's seat, for example, and performs mutual communication with the communication circuit 22 of the mobile phone 21 via the transmission / reception antenna 24. The communication controller 23 is connected to the main controller 20 and can output a result of mutual communication with the mobile phone 21 to the main controller 20.

  The transmission / reception antenna 24 is an antenna that is installed on, for example, a door handle knob outside the door and has a characteristic of performing communication within a minute area (for example, about 5 to 10 cm). The transmission / reception antenna 24 corresponds to a communication antenna.

  The communication controller 23 is connected to, for example, a push-type start button 25 that starts the communication system 18. The activation button 25 is disposed, for example, on a door handle knob or the like, and outputs an ON signal to the communication controller 23 when pressed. The communication controller 23 activates the communication system 18 when an ON signal is input from the activation button 25.

  The mobile phone 21 incorporates a CPU 26 that performs overall control of the mobile phone 21, a ROM 27 that stores various programs and applications for the mobile phone 21, and a RAM 28 that serves as a work area when the CPU 26 executes programs and applications. ing. The mobile phone 21 includes various buttons 29 that are operated when the mobile phone 21 is operated, a microphone 30 that collects the voice of the operator, a speaker 31 that outputs the voice of the caller, and various operations. A screen 32 for displaying corresponding images and characters is provided.

  The communication circuit 22 is connected to the CPU 26 via the interface 33. An IC substrate 34 of the communication circuit 22 is provided with a control IC 35 that controls the communication circuit 22, a data rewritable memory 36, and an antenna 37 that can transmit and receive various signals. For example, an EEPROM or the like is used as the memory 36 and is connected to the control IC 35 by a printed wiring. The antenna 37 has a shape that is wound in a square ring shape along the periphery of the substrate 34 and is electrically connected to the control IC 35.

When the activation button 25 is pressed and the communication system 18 is activated, the communication controller 23 drives the transmission radio wave (electromagnetic wave) S _c1 from the transmission / reception antenna 24 within a minute area before communicating with the communication circuit 22. Is sent intermittently. Since the transmission area of the drive radio wave S _c1 is as small as about 5 to 10 cm, when the mobile phone 21 (that is, the communication circuit 22) is held over the transmission / reception antenna 24, the antenna 37 receives the drive radio wave S _c1. Become. At this time, electric power is generated in the communication circuit 22 by the driving radio wave _Sc1 , and the communication circuit 22 is activated based on the electric power.

  After starting the communication circuit 22, the reader / writer 19 and the communication circuit 22 communicate with each other according to a communication method compliant with the ISO / IEC 18092 standard. The communication between the reader / writer 19 and the communication circuit 22 employs a communication technique in which transmission data is encrypted and random numbers are generated in the data to perform mutual authentication between the reader / writer 19 and the communication circuit 22. ing. During this communication, the control IC 35 can perform various processes such as data reading from the memory 36 and data writing to the memory 36 based on a command from the reader / writer 19.

  In this communication system 18, a unique portable key ID code (second identification code) possessed by the communication circuit 22 is stored in each of the memory 36 of the communication circuit 22 and the memory 36 of the communication controller 23. This portable key ID code is registered in each of the memories 36 and 36 in an encrypted state. When the reader / writer 19 and the mobile phone 21 perform wireless communication, if the mobile key ID code of the communication circuit 22 matches the mobile key ID code registered in the communication controller 23 of the reader / writer 19, the mobile phone 21 It is possible to allow or execute one operation.

The communication circuit 22 that has started activation transmits a portable key ID code signal _{Sc 2} including its own portable key ID code from the antenna 37. When the communication controller 23 receives the portable key ID code signal _Sc2 by the transmission / reception antenna 24, the communication controller 23 collates the portable key ID code with the portable key ID code registered in its own memory 23a. When these ID codes match to recognize that the collation is established, the communication controller 23 outputs a collation establishment signal Sr notifying that the ID collation coincides to the main controller 20. When the main controller 20 receives the collation establishment signal Sr from the communication controller 23, the main controller 20 sets a collation establishment flag in its own memory 20a and recognizes the collation match with the portable device 2.

  The main controller 20 is connected to the in-vehicle LF transmitter 8 through the first wiring 38a and is connected to the in-vehicle LF transmitter 9 through the second wiring 38b. When the smart ECU 3 outputs the external LF data to the external LF transmitter 8 and transmits the request signal Srq to the outside of the vehicle, the main controller 20 inputs the external LF data via the first wiring 38a. When the smart ECU 3 outputs the in-vehicle LF data to the in-vehicle LF transmitter 9 and transmits the request signal Srq to the in-vehicle, the main controller 20 inputs the in-vehicle LF data through the second wiring 38b. An RF transmitter 39 capable of transmitting an RF band signal is connected to the main controller 20. Note that the RF receiver 10 and the RF transmitter 39 constitute a transmission means.

  The memory 20a of the main controller 20 stores a vehicle key ID code that can be verified by the smart ECU 3. When the vehicle controller LF data or in-vehicle LF data is input when the verification establishment flag is set, the main controller 20 receives the vehicle key ID code signal Sid as an RF transmitter when the transmission conditions are met. 39 can be transmitted. This vehicle key ID code may be the same as or different from the vehicle key ID code of the portable device 2, but if it is different between the portable device 2 and the main controller 20, each vehicle It is necessary to register the key ID code in the smart ECU 3 in advance. The request signal Srq corresponds to a reply request, and the vehicle key ID code signal Sid corresponds to code data.

  The main controller 20 is connected to a cradle 40 used as a place for placing the mobile phone 21. The cradle 40 is a device that exchanges data between the mobile phone 21 set in the cradle 40 and the main controller 20, and is disposed, for example, in a center console in a vehicle. When the mobile phone 21 is set in the cradle 40, the cradle 40 outputs to the main controller 20 a mobile phone placement signal Sk that notifies that fact. The cradle 40 also has a function of charging the mobile phone 21 set in itself. The cradle 40 corresponds to the communication terminal placement detection means, and the mobile phone placement signal Sk corresponds to the communication terminal placement signal.

Next, communication modes performed between the reader / writer 19 and the cellular phone 21 when various vehicle operations are permitted or executed by the cellular phone 21 will be described with reference to FIG.
When the activation button 25 is operated to activate the communication system 18, the communication controller 23 of the reader / writer 19 transmits the driving radio wave _{Sc 1} from the transmission / reception antenna 24 to the outside as polling (calling). When the mobile phone carrier holds the mobile phone 21 over the transmission / reception antenna 24 to release the door lock of the parked vehicle, and the communication circuit 22 of the mobile phone 21 receives the driving radio wave S _c1 via the antenna 37, the communication circuit 22 Start by S _c1 .

The communication circuit 22 that has started up _returns a response signal _{Sc 3} including information such as its own manufacturing number from the antenna 37 to the reader / writer 19. The communication controller 23 refers to the serial number in the response signal _Sc3 to determine whether the currently communicating communication circuit 22 has a model number that allows communication. If communication is possible, the communication controller 23 proceeds to mutual authentication processing.

  Subsequently, mutual authentication is performed between the communication circuit 22 and the communication controller 23. For this mutual authentication, the security of triple DES, which is a triple application of a secret key encryption algorithm called DES (Data Encryption Standard), is performed. High encryption communication is adopted. In Triple DES, for example, a specific sentence is encrypted with a key (encryption table) Ka, the result is decrypted with the key (encryption table) Kb, and the result is further performed with the key (encryption table) Kc (key Ka). ) To encrypt.

  As the mutual authentication, first, the communication controller 23 generates a random number Rr, encrypts the random number Rr in the transmission data, and transmits the encrypted data to the communication circuit 22. The communication circuit 22 decrypts the encrypted data received from the communication controller 23 to extract the random number Rr, generates encrypted data including the random number Rr, and returns the encrypted data to the communication controller 23. The communication controller 23 decrypts the encrypted data received from the communication circuit 22, extracts the random number Rr, and determines whether or not it matches the random number Rr generated by itself.

  On the other hand, the communication circuit 22 also generates a random number Rc, encrypts the random number Rc included in the transmission data, and transmits the encrypted data to the communication controller 23. The communication controller 23 decrypts the encrypted data received from the communication circuit 22 to extract the random number Rc, generates encrypted data including the random number Rc, and returns the encrypted data to the communication circuit 22. The communication circuit 22 decrypts the encrypted data received from the communication controller 23, extracts the random number Rc, and determines whether or not it matches the random number Rc generated by itself. If the reader / writer 19 and the communication circuit 22 recognize that the random number matches, the communication controller 23 determines that mutual authentication has been established.

When mutual authentication is established, the communication controller 23 transmits an ID code request signal S _c4 to the communication circuit 22 in order to request the communication circuit 22 to transmit the ID code. When the communication circuit 22 receives the ID code request signal S _c4 from the communication controller 23, the communication circuit 22 transmits a portable key ID code signal S _c2 carrying its own portable key ID code. Note that single DES to which only one DES is applied is adopted for communication for exchanging the ID code request signal S _c4 and the portable key ID code signal S _c2 .

When the communication controller 23 receives the portable key ID code signal S _c2 from the communication circuit 22, the communication controller 23 collates the portable key ID code included in the portable key ID code signal S _c2 with the portable key ID code registered in itself. . When the communication controller 23 recognizes that the ID verification has been established with the mobile phone 21, the communication controller 23 outputs a verification establishment signal Sr to notify the fact to the main controller 20.

Next, details of the processing when the mobile phone 21 performs locking / unlocking of the door lock and starting of the engine will be described with reference to FIGS.
When the cellular phone 21 is held over the transmission / reception antenna 24, the communication circuit 22 starts to be activated by the driving radio wave S _c1 transmitted from the transmission / reception antenna 24, and the communication circuit 22 _{returns a} portable key ID code signal S _c2 . The communication controller 23 receives the portable key ID code signal _{Sc 2} with the transmission / reception antenna 24 and acquires the portable key ID code of the communication circuit 22. The communication controller 23 compares the portable key ID code acquired from the communication circuit 22 with its own portable key ID code, and if these codes match and ID collation is established, the collation establishment signal Sr is sent to the main controller 20. Output.

  When the main controller 20 receives the collation establishment signal Sr from the communication controller 23, the main controller 20 sets a collation establishment flag in its own memory 20a and recognizes that the portable key ID code matches between the vehicle 1 and the mobile phone 21.

  Here, when the vehicle 1 is parked (push switch off, door fully closed and door lock locked), the request signal Srq is transmitted from the vehicle exterior LF transmitter 8, and therefore, the vehicle ECU 1 transmits vehicle exterior LF. The machine 8 is in a state in which the vehicle-side LF transmission data is output. At this time, the vehicle controller LF transmission data is input to the main controller 20 via the first wiring 38a. When the vehicle controller LF transmission data is being input, the main controller 20 responds to the in-vehicle LF transmission data and sets the vehicle registered in its own memory 20a if a verification establishment flag is set in its own memory 20a. A vehicle key ID code signal Sid carrying the key ID code is transmitted from the antenna 39a of the RF transmitter 39.

  When the smart ECU 3 receives the vehicle key ID code signal Sid transmitted from the RF transmitter 39 by the RF receiver 10, the smart ECU 3 compares the vehicle key ID code included therein with the vehicle key ID code stored in its own memory 3a. ID verification is performed. When this ID collation is established, the smart ECU 3 recognizes that the vehicle outside collation is established under detection of communication area intrusion, and therefore enters the door lock release permission operation, activates the touch sensor 11 and enters the door unlock standby state. Accordingly, when the door handle knob is touched by hand, the smart ECU 3 outputs a door unlock request signal to the door ECU 4 to release the door lock.

  On the other hand, when the lock button 12 is pressed when the vehicle 1 is in a stopped state (push switch off and door fully closed), the smart ECU 3 moves the vehicle LF transmitter 8 to the vehicle LF transmitter 8 to form a communication area around the vehicle. Outputs external LF data. Therefore, as in the case of door unlocking, the vehicle external LF data is input to the main controller 20 via the first wiring 38a. At this time, if the verification establishment flag is set in the memory 20a, the RF transmitter A vehicle key ID code signal Sid is transmitted from 39.

  When the smart ECU 3 receives the vehicle key ID code signal Sid transmitted from the RF transmitter 39, the smart ECU 3 performs ID collation of the vehicle key ID code included in the same as in the case of door unlocking. At this time, since the smart ECU 3 recognizes that the vehicle outside verification is established under the operation of the lock button, the smart ECU 3 enters a door lock releasing operation, outputs a door lock request signal to the door ECU 4, and puts the door lock into a locked state.

  Further, after the driver gets on, the request signal Srq is output from the in-vehicle LF transmitter 9 and the in-vehicle verification is performed. Therefore, when the driver's boarding is detected by the courtesy switch 16, the in-vehicle LF is detected from the smart ECU 3. The vehicle-outside LF transmission data is output to the transmitter 9. At this time, the in-vehicle LF transmission data is input to the main controller 20 via the second wiring 38b. When the main controller 20 inputs the vehicle-side LF transmission data, the main controller 20 determines whether or not the verification establishment flag is set in its own memory 20 a and the mobile phone placement signal Sk is input from the cradle 40. If these two conditions are met, the main controller 20 transmits the vehicle key ID code signal id from the RF transmitter 39 in response to the in-vehicle LF transmission data.

  When the smart ECU 3 receives the vehicle key ID code signal Sid transmitted from the RF transmitter 39 by the RF receiver 10, the smart ECU 3 compares the vehicle key ID code included therein with the vehicle key ID code stored in its own memory 3a. ID verification is performed. When this ID collation is established, the smart ECU 3 recognizes the establishment of the in-vehicle collation under the situation where the request signal Srq is transmitted to the inside of the vehicle, and permits the engine start. Therefore, if the push switch 14 is turned on while depressing the brake pedal, the engine ECU 17 is activated and the engine 13 is started.

  Here, if the portable device 2 is not at hand, it is impossible to release the door lock and get into the vehicle or start the engine after getting into the vehicle 1. However, if the mobile phone 21 in which the mobile key ID code is registered is held over the transmission / reception antenna 24 and the ID verification is established between the mobile phone 21 and the reader / writer 19, the vehicle external verification or the vehicle internal verification is established. Even if the portable device 2 is not present, the user can get into the vehicle or start the engine 13 after getting in the vehicle.

  When the driver stops the engine 13 and gets off the vehicle, the main controller 20 inputs the mobile phone placement signal Sk from the cradle 40 when detecting that the door is opened based on the door opening / closing signal from the courtesy switch 16. It is determined whether or not. If the mobile phone placement signal Sk is not input from the cradle 40, the main controller 20 notifies the driver of the fact by the alarm 40a and the LED 40b of the cradle 40. The notification by the alarm 40a and the LED 40b is stopped when the release button 40c disposed on the cradle 40 is pressed. The alarm 40a and the LED 40b constitute notification means.

  When the driver stops the engine 13 and gets off and pushes the lock button 12 of the handle knob, the smart ECU 3 outputs a door lock request signal to the door ECU 4 and the door lock is locked. At this time, the door ECU 4 that detects the completion of the door lock outputs a door lock completion signal to the main controller 20. When the main controller 20 receives the door lock completion signal from the door ECU 4, the main controller 20 flags off the collation establishment flag set for itself, and stops the activation of the communication system 18 until the activation button 25 is operated again.

  Note that the memory 36 of the communication circuit 22 can have a plurality of folders and a plurality of files in the folders according to applications. Therefore, various data can be written in the memory 36 in addition to the portable key ID code (that is, the vehicle key ID). Therefore, the mobile phone 21 incorporating the communication circuit 22 is not only a substitute for a vehicle key, but also a train ticket (commuter pass), a prepaid card (wallet), a point card, a membership card, an employee ID card, a student ID card, It can be used as various cards such as a credit card and a mileage card.

Next, a method for registering the mobile key ID code in the mobile phone 21 (that is, the memory 36 of the communication circuit 22) will be described.
As a method of registering the mobile key ID code in the memory 36 of the communication circuit 22, for example, a method of acquiring the mobile key ID code from the management server 41 by connecting the mobile phone 21 to the dedicated management server 41 via a network, There is a method in which the mobile phone 21 is set in a dedicated writing device 42 that can write to the mobile phone 21 and acquired from the writing device 42.

  First, when the mobile key ID code is acquired from the management server 41, the button group 29 of the mobile phone 21 is operated to connect the mobile phone 21 to the management server 41 via the antenna 43 via a network. At this time, an ID code acquisition screen 44 shown in FIG. 5 is displayed on the screen 32 of the mobile phone 21. In the ID code acquisition screen 44, a management number input field 44a for inputting a management number given by the system administrator when joining the communication system 18 and a personal identification number set by the vehicle owner are input. And a personal identification number input field 44b. The user inputs necessary information on the ID code acquisition screen 44 and then returns the personal information data to the management server 41.

  In the database of the management server 41, management numbers and passwords of subscribers who have joined the communication system 18 are registered. Therefore, the management server 41 recognizes the user who has connected to the management server 41 by referring to the database based on the management number and the password entered from the mobile phone 21, and the mobile key ID of the vehicle owned by the user. Read the code from the database. Then, the management server 41 returns the ID code data carrying the portable key ID code to the user's cellular phone 21.

  When the mobile phone 21 receives the ID code data via the antenna 43, the CPU 26 of the mobile phone 21 outputs this ID code data to the communication circuit 22 via the interface 33. When the communication circuit 22 receives the ID code data, the control IC 35 of the communication circuit 22 writes the ID code in its own memory 36. As a result, the portable key ID code of the vehicle transmitted from the management server 41 is registered in the portable phone 21, and the portable phone 21 can be used as a vehicle key.

  On the other hand, when the management server 41 receives the personal information data from the mobile phone 21 and determines that the operator who has input this data does not exist in the database, the management server 41 determines that the input data is incorrect. Recognizing, the management server 41 replies to the mobile phone 21 with a notification to prompt data re-input. When the CPU 26 of the mobile phone 21 receives a notification for prompting data re-input, the CPU 26 displays that effect on the screen 32 and allows the operator to re-enter personal information data.

  When acquiring the ID code from the dedicated writing device 42, one end of the connection cable 42 a extending from the writing device 42 is inserted into the connection port 45 of the mobile phone 21 to connect the mobile phone 21 to the writing device 42. To do. Then, the input button of the writing device 42 is operated to display the ID code input screen 46 shown in FIG. 6 on the screen of the writing device 42. The ID code input screen 46 includes a manufacturing number input field 46a for inputting the manufacturing number of the communication circuit 22 and an ID code input field 46b for inputting a portable key ID code. The user inputs necessary information on the ID code input screen 46 and then outputs the ID information data from the writing device 42 to the mobile phone 21.

  When the mobile phone 21 inputs ID information data from the writing device 42, the CPU 26 of the mobile phone 21 outputs this ID information data to the communication circuit 22 via the interface 33. Here, since the own manufacturing number is registered in the memory 36 of the communication circuit 22, the control IC 35 of the communication circuit 22 determines the manufacturing number in the input ID information data and the manufacturing number registered in itself. And compare. If these serial numbers match, the control IC 35 determines that the mobile key ID code input operation has been performed by a regular registration operation, and writes the input mobile key ID code in the memory 36. Thereby, the portable key ID code of the vehicle output from the writing device 42 is registered in the portable telephone 21, and the portable telephone 21 can be used as a vehicle key.

  On the other hand, when the serial numbers of the ID information data input from the writing device 42 are different, the control IC 35 of the communication circuit 22 outputs a notification that the input data is erroneous data to the CPU 26. When the CPU 26 inputs a notification that the input data is incorrect data, the CPU 26 outputs a notification to that effect to the writing device 42. When the writing device 42 inputs a notification that the input data is erroneous data from the mobile phone 21, the writing device 42 displays that fact on its own screen and causes the operator to re-enter the ID information data. The notification of the erroneous data may be performed by the mobile phone 21.

  When the registration of the mobile key ID code in the mobile phone 21 is completed, the operation proceeds to registering the mobile key ID code in the reader / writer 19. As this work, for example, the reader / writer 19 is set to the portable key ID input mode by long-pressing the start button 25 or the like. In this state, when the mobile phone 21 is held over the transmission / reception antenna 24, communication is performed between the reader / writer 19 and the communication circuit 22, and the reader / writer 19 receives the mobile key ID code from the communication circuit 22. The reader / writer 19 writes the portable key ID code received from the communication circuit 22 in its own memory 36, and completes the registration work of the portable key ID code.

  Therefore, in this example, even if the mobile device 2 is not at hand, if the mobile phone 21 in which the mobile key ID code is registered is possessed, the door lock / unlock of the door lock and the engine start are permitted by the mobile phone 21. Therefore, even when the portable device 2 at hand is not owned, it is possible to get into the vehicle and start the engine. Further, since the mobile phone 21 having the Felica (R) function has a feature satisfying a plurality of card functions, only the mobile key ID code is registered in the communication circuit 22 built in the mobile phone 21. The mobile phone 21 can also be used as a vehicle key. Therefore, it is also an advantage that there is no need to separately prepare a vehicle key replacement communication terminal.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) Even if there is no portable device 2 at hand, if the mobile phone 21 in which the portable key ID code is registered is owned, the vehicle can be boarded and the engine can be started. In addition, since the mobile phone 21 having the Felica® function has a feature that satisfies a plurality of card functions, one mobile phone 21 can be connected to the vehicle key only by registering the mobile key ID code in the communication circuit 22. Can also be used. Therefore, when preparing a substitute key for a vehicle key, there is no need to separately prepare a communication terminal for it.

  (2) Even if the mobile phone 21 permits the door lock to be unlocked and unlocked and the immobilizer lock released as in this example, the wireless communication between the mobile phone 21 and the reader / writer 19 is not limited to high-speed wireless communication. Since Felica (R), which is capable of high security, is used, high-speed communication processing and high security can be ensured.

  (3) The wireless communication between the reader / writer 19 and the mobile phone 21 uses a symmetric communication method having a characteristic of low unnecessary radiation, and further, collision of carrier waves by a time slot method in which the number of transactions is less than other methods. Since detection / avoidance is performed, it is very effective in increasing the communication speed.

  (4) The wireless communication between the reader / writer 19 and the mobile phone 21 uses carrier wave encryption, and the data of this carrier wave is authenticated by the reader / writer 19 and the mobile phone 21 (mutual authentication). At the same time, a mechanism for changing the encryption key for each mutual authentication (in this example, triple DES) is used, which is very effective in ensuring high security.

  (5) When the door is opened, if the mobile phone 21 is not placed on the cradle 40, the alarm 40a or LED 40b of the cradle 40 notifies the fact. Accordingly, it is possible to make it difficult for the passenger to take out the mobile phone 21 without permission or to leave the mobile phone 21 in the passenger compartment.

  (6) Communication in which the main controller 20 outputs the vehicle key ID code signal Sid to the smart ECU 3 is performed wirelessly using the RF receiver 10 and the RF transmitter 39. Therefore, problems such as wire entanglement and wiring connection work that may occur when this communication is wired do not occur, and further, the arrangement flexibility of the smart ECU 3 and the main controller 20 is improved.

  (7) Since the communication system 18 of this example can be retrofitted to the vehicle 1, if the verification of the identification code is established between the reader / writer 19 and the mobile phone 21, various operations of the vehicle 1 can be performed without using the main key. Functions that are permitted or executed can be appropriately provided in the vehicle 1 as necessary. In addition, even if the communication system 18 is added to the vehicle 1, the smart entry / start system 1a so far requires almost no major design changes, so that ID collation communication using the portable device 2 is still performed. Can be implemented.

(8) Since the activation button 25 that is operated when the reader / writer 19 is activated is provided, the reader / writer 19 transmits the drive radio wave _Sc1 when the activation button 25 is operated. Accordingly, since the reader / writer 19 is in a standby state before the start button 25 is operated, power is not required for the reader / writer 19 before that, so that the battery mounted on the vehicle 1 can be saved. it can.

  (9) Since the portable key ID code can be written in the communication circuit 22 using the management server 41 or the dedicated writing device 42, for example, the communication circuit 22 is overwritten with a new ID code as appropriate. You can also. Therefore, when the driving vehicle changes, if the mobile key ID code for the vehicle is newly written in the communication circuit 22, the mobile phone 21 can drive the vehicle. Different vehicles 1 can be driven. Even if the vehicle 1 is replaced, if the ID code is re-registered, the door lock and immobilizer lock of the new vehicle can be released with the conventional mobile phone 21.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. In this example, only the antenna configuration is different from that of the first embodiment, and the other components are the same. Therefore, in this example, the same parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and only different parts are described.

  As shown in FIG. 7, an outside antenna 51 and an inside antenna 52 are connected to the communication controller 23 as antennas for the communication system 18. The communication controller 23 performs mutual communication with the communication circuit 22 of the mobile phone 21 via the outside antenna 51 when the mobile phone 21 is outside the vehicle, and the in-vehicle antenna 52 when the mobile phone 21 is outside the vehicle. Through the communication circuit 22 of the mobile phone 21. The vehicle exterior antenna 51 and the vehicle interior antenna 52 constitute a communication antenna.

  The vehicle exterior antenna 51 is an antenna that is installed on, for example, a door handle knob outside the door and has a characteristic of performing communication within a minute area (for example, about 5 to 10 cm). The in-vehicle antenna 52 is an antenna that is installed in the vicinity of the steering wheel of the driver's seat, for example, and has a characteristic of performing communication within a very small area in the same manner as the outside antenna 51.

When the start button 25 is pressed and the communication system 18 starts to be started when the vehicle 1 is in the parking state, the communication controller 23 first transmits the drive radio wave S _c1 from the outside antenna 51. When the driver holds the mobile phone 21 over the antenna 51 outside the vehicle, collation is performed between the reader / writer 19 and the communication circuit 22 by wireless communication, and the communication circuit 22 starts to be activated by the driving radio wave _Sc1 , and the activated communication is performed. The circuit 22 _{returns a} portable key ID code signal _Sc2 . The communication controller 23 compares the portable key ID code with its own portable key ID code, and when these codes match and the mobile phone exterior verification is established, it outputs the cellular phone exterior verification establishment signal Sr1 to the main controller 20.

  When the main controller 20 receives the mobile phone exterior verification establishment signal Sr1 from the communication controller 23, if the exterior LF transmission data is input, the main controller 20 responds to the exterior LF transmission data in its own memory 20a. A vehicle key ID code signal Sid carrying the registered vehicle key ID code is transmitted from the RF transmitter 39. Therefore, the smart ECU 3 recognizes the collation match of the vehicle key ID code under the situation where the intrusion of the portable device 2 into the communication area outside the vehicle is detected. Is allowed to be released, and the door lock is released when the door handle knob is touched.

  Further, when the lock knob 12 of the handle knob is pressed in the state where the mobile phone exterior verification is established, the main controller 20 inputs the exterior LF transmission data from the smart ECU 3. Therefore, since the main controller 20 inputs the outdoor LF transmission data while inputting the mobile phone vehicle outside verification establishment signal Sr1, the vehicle key ID code signal Sid is sent in response to the vehicle LF transmission data. It transmits from the RF transmitter 39. Therefore, the smart ECU 3 recognizes that the vehicle outside verification has been established by using the operation of the lock button 12 as a trigger, and thus locks the door lock.

When the main controller 20 detects a door opening operation from the door opening / closing signal from the courtesy switch 16, the main controller 20 determines that the driver has entered the vehicle, sends a command to the reader / writer 19, and replaces the outside antenna 51 with the inside antenna. The drive radio wave _{Sc 1} is transmitted from 52. When the driver seated on the driver's seat holding the mobile phone 21 to the vehicle antenna 52, the communication circuit 22 is started by the drive wave S _c1 of vehicle antenna 52, wireless communication is started between the reader writer 19 and the communication circuit 22 Is done. If the communication controller 23 determines that these mobile key ID codes match and mobile phone in-vehicle verification is established, it outputs a mobile phone in-vehicle verification establishment signal Sr2 to the main controller 20.

  When the main controller 20 receives the in-vehicle LF transmission data when the mobile phone in-vehicle verification confirmation signal Sr2 is input, the main controller 20 sends the vehicle key ID code signal Sid from the RF transmitter 39 in response to the in-vehicle LF transmission data. send. When the smart ECU 3 recognizes the matching of the vehicle key ID code in a situation where the request signal Srq is transmitted to the inside of the vehicle, the smart ECU 3 recognizes the establishment of the in-vehicle verification and permits the engine start. Therefore, when the push switch 14 is pressed with the brake pedal depressed, the engine 13 starts to start.

  In the mobile phone in-car verification, the mobile phone placement signal Sk output from the cradle 40 may be added to the condition that the main controller 20 transmits the vehicle key ID code signal Sid from the RF transmitter 39. In this case, the main controller 20 responds to the in-vehicle LF transmission data if the in-vehicle LF transmission data and the mobile phone placement signal Sk are input when the in-vehicle verification verification signal Sr2 is input. The vehicle key ID code signal Sid is transmitted from the RF transmitter 39.

According to the configuration of the present embodiment, the following effects can be obtained.
(10) Since the antennas for the reader / writer 19 are individually provided outside and inside the vehicle, when using the mobile phone 21 (communication circuit 222) in the vehicle, when the engine is started after entering the vehicle. As a result, the number of ID verifications increases, which is effective in preventing unauthorized engine start.

In addition, this embodiment is not limited to the said structure, You may change into the following aspects.
The engine start method of the smart entry start system 1a is not limited to the push type in which the push switch 14 is pushed and the engine 13 is started. For example, a switch knob that can be rotated is arranged near the instrument panel in the vehicle, and the switch knob is turned from the OFF position to the ACC position → IG position → ON position to start the engine 13. Good.

  -Locking / unlocking the door lock is not limited to a system in which the door lock is released by touching the handle knob and the door lock is locked by pressing the lock button 12. For example, when the mobile phone 21 enters the communication area of the external LF transmitter 8 when the vehicle is parked, the door lock is automatically released, and when the mobile phone 21 goes out of the communication area, the door lock is automatically released. A locking method may be used.

  When the main controller 20 transmits the vehicle key ID code signal Sid from the RF transmitter 39, the main controller 20 does not necessarily require the input of the in-vehicle LF data (in-vehicle LF data). That is, if ID collation is established between the reader / writer 19 and the communication circuit 22, the main controller 20 may transmit the vehicle key ID code signal Sid.

  The communication between the main controller 20 and the vehicle exterior LF transmitter 8 and the vehicle interior LF transmitter 9 is not limited to the wire using the first wiring 38a and the second wiring 38b, and may be wireless. In this case, the first wiring 38a and the second wiring 38b that connect the main controller 20 to the vehicle exterior LF transmitter 8 and the vehicle interior LF transmitter 9 become unnecessary, and problems such as wiring entanglement and wiring connection work are required. In addition, the degree of freedom of arrangement of the smart ECU 3 and the main controller 20 is improved.

-ID collation between the reader / writer 19 and the mobile phone 21 is not necessarily limited to being performed by the reader / writer 19. For example, when the reader / writer 19 receives the mobile key ID code signal S _c2 from the mobile phone 21, it bridges the mobile key ID code of the received mobile key ID code signal S _c2 to the main controller 20, and the main controller 20 receives the ID. Verification may be performed.

A method for registering the portable key ID code in the reader / writer 19 using the management server 41 or the writing device 42 may be adopted as in the case of the cellular phone 21.
The communication method for wireless communication between the reader / writer 19 and the communication circuit 22 is not limited to the communication method standardized by Felica®, and the communication method is not particularly limited.

The activation button 25 that activates the reader / writer 19 is not always necessary. In other words, the start button 25 may be omitted, and the drive radio wave _Sc1 may be constantly transmitted from the vehicle exterior antenna 51 and the vehicle interior antenna 52.

  The terminal used as a substitute for the vehicle key is not limited to the mobile phone 21 and may be another communication terminal such as a PDA (personal digital assistant) as long as the communication circuit 22 is incorporated.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(1) In Claims 1, 2, and 6-9, the communication antenna is an outside antenna installed outside the vehicle, and the verification means includes the second identification code of the communication terminal received by the outside antenna. When the vehicle side second identification code that the vehicle has has been matched to determine that the verification has been established, an out-of-vehicle verification establishment signal that notifies that the verification has been established by the outside antenna is output to the control means, When the control means inputs the outside verification verification signal from the verification means, the control means outputs the code data including the first identification code to the control unit, and permits or unlocks the door lock to the control unit or Let it run. In this case, the driver (occupant) can lock and unlock the door lock from the outside of the vehicle.

  (2) In Claims 1, 2, 6 to 9 and the technical idea (1), the communication antenna is an in-vehicle antenna installed in a vehicle, and the verification means receives the communication received by the in-vehicle antenna. If the second identification code of the terminal matches the second identification code on the vehicle side that the terminal has, and the collation is established, an in-vehicle collation establishment signal is sent to notify that the collation is established by the in-vehicle antenna. When the control means inputs the in-vehicle verification establishment signal from the verification means, the control means outputs the code data including the first identification code to the control unit, and outputs the code data to the control unit. Allow the engine to start. In this case, since the driver checks the communication terminal after getting into the vehicle, the engine is allowed to start while the driver is inside the vehicle, for example, when the driver is outside the vehicle. It is difficult for the engine start to be permitted.

  (3) In the technical idea (2), when the communication terminal is placed on the vehicle as a place where the communication terminal is placed, a communication terminal placement signal for notifying the fact is placed on the vehicle. A communication terminal placement detection means for outputting to the control means, the control means inputs the in-vehicle verification establishment signal from the verification means, and inputs the communication terminal placement signal from the communication placement detection means; The code data is output to the control unit, and the control unit is allowed to start the engine. In this case, since the engine cannot be started unless the two conditions of matching of the second identification code using the in-vehicle antenna and placement of the communication terminal on the communication terminal place are met, the security level against vehicle theft increases.

  (4) In the technical ideas (1) to (3), the communication terminal is installed in the vehicle as a place for placing the communication terminal, and notifies the fact when the communication terminal is placed. A communication terminal placement detection means for outputting a position signal to the control means; a getting-off detection means for detecting that the vehicle occupant has got off; and a notification means capable of notifying the occupant. When it is determined that the driver has got off based on the detection signal of the getting-off detection means, and it is determined that the communication terminal is not placed at the above-described place based on the communication terminal placement signal, The effect is notified by the notification means. In this case, when the driver opens the door in order to get off the vehicle, if the communication terminal is not placed at the place of placement, the notification means notifies that, so if the communication terminal is left behind in the car, It is difficult for a user to take out a communication terminal without permission.

  (5) In any one of claims 1 to 9 and the technical ideas (1) to (4), the communication device is a system activation operation unit that causes the second vehicle antenna to start transmitting the driving radio wave. It has.

  (6) In any one of claims 1 to 9 and the technical ideas (1) to (5), the communication terminal obtains the second identification code from an external server or an external device that manages the second identification code. A registration unit is provided for capturing and registering the second identification code in the communication terminal.

  (7) In any one of claims 1 to 9 and the technical ideas (1) to (6), the communication terminal is built in a mobile phone. In this case, for example, various vehicle operations such as locking / unlocking the door lock and permission to start the engine can be performed by the mobile phone.

The block diagram which shows the structure of the electronic key system in 1st Embodiment. A transaction chart of wireless communication performed between a reader / writer and a mobile phone. The transaction chart which shows the detail of the communication performed at the time of door lock locking / unlocking. The transaction chart which shows the detail of the communication performed at the time of engine start permission. The ID code acquisition screen figure at the time of registering a portable key ID code with a mobile telephone. The ID code input screen figure at the time of registering a portable key ID code with a mobile telephone. The block diagram which shows the structure of the electronic key system in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Portable machine, 3 ... Smart ECU as a control unit, 8 ... In-vehicle LF transmitter which comprises a transmission antenna (external transmission antenna), 9 ... In-vehicle which comprises a transmission antenna (in-vehicle transmission antenna) LF transmitter, 10 ... RF receiver constituting reception antenna and transmission means, 16 ... Courtesy switch as getting-off detection means, 18 ... Communication system as communication unit, 19 ... Communication controller as verification means, 20 ... Control means Main controller, 22 ... communication circuit (IC card) as communication terminal, 24 ... transmission / reception antenna constituting communication antenna, 36 ... memory, 39 ... RF transmitter constituting transmission means, 40 ... communication terminal placement detection Cradle as means, 40a ... Alarm constituting notifying means, 40b ... LED constituting notifying means, 5 ... an outside antenna constituting a communication antenna, 52 ... an inside antenna constituting a communication antenna, Srq ... a request signal as a reply request, Sid ... a vehicle key ID code signal as code data, Sc1 ... a drive radio wave, Sr (Sr1, Sr2) )... Verification verification signal, Sk... Mobile phone placement signal as communication terminal placement signal, Rr, Rc.

Claims (10)

When the portable device receives a reply request that the vehicle-side transmission antenna transmits wirelessly, the portable device returns the first identification code of the portable device by itself, and the vehicle receives the first identification code by the reception antenna. The control unit for controlling various vehicle operations of the vehicle collates the first identification code on the portable device side with the first identification code on the vehicle side, and if the collation is established, permits the various vehicle operations or In the electronic key system to be executed,
Multi-purpose data for each use is managed in its own memory, and a communication terminal capable of performing wireless communication with a plurality of wireless communication targets by itself by performing wireless communication with the wireless communication target in units of each use;
When the second identification code provided on the vehicle and transmitted by the communication terminal via the wireless communication is received by its own communication antenna, the second identification code on the terminal side and the second identification code on the vehicle side are collated. Matching means to
When the verification of the second identification code by the verification means is established in the vehicle, the code data of the first identification code is output to the control unit instead of the portable device, and the control unit An electronic key system comprising: control means for establishing verification of the first identification code by   The communication method of the wireless communication is such that when the communication terminal is held over the communication antenna that transmits a driving radio wave, the communication terminal is activated by the driving radio wave, and communication with the communication device is started. In communication, communication is performed by symmetric communication that does not use a subcarrier between the communication terminal and the communication device, and encrypted communication that changes an encryption key each time data is exchanged between the communication terminal and the communication device is used. 2. The electronic key system according to claim 1, wherein mutual authentication is employed in which different random numbers are generated between the communication terminal and the communication device, and each of them confirms whether the random number matches. One communication antenna that communicates with the communication terminal is installed in the vehicle,
If the collation means determines that the collation is established when the second identification code of the communication terminal received by the communication antenna matches the second identification code on the vehicle side that the collation means has, the collation establishment signal is generated. Output to the control means,
When the verification means signal is input from the verification means, the control means outputs the code data including the first identification code to the control unit, and permits or executes door lock / unlock for the control unit. The electronic key system according to claim 1 or 2, wherein A communication terminal placement detection means that is provided in the vehicle as a placement location of the communication terminal, and outputs a communication terminal placement signal that notifies the control means when the communication terminal is placed; Prepared,
When the control means inputs the verification establishment signal from the verification means and inputs the communication terminal placement signal from the communication terminal placement detection means, the control means controls the code data including the first identification code. 4. The electronic key system according to claim 3, wherein the electronic key system is output to a unit to allow the control unit to start the engine. Alighting detection means for detecting that the vehicle occupant has got off;
An informing means capable of informing the passenger,
When the control means detects that the occupant has got off based on the detection signal from the getting-off detection means, the control means determines that the communication terminal is not placed at the placement location based on the communication terminal placement signal. The electronic key system according to claim 4, wherein the notification means notifies the fact to that effect.   The electronic key system according to claim 1, further comprising a transmission unit that wirelessly transmits the code data generated by the control unit to the control unit.   The communication unit including the communication terminal, the verification unit, and the control unit is a retrofit that can be attached to the vehicle as necessary. Electronic key system. The transmission antenna is an out-of-vehicle transmission antenna that inputs transmission data for generating a response request from the control unit and generates the response request, and transmits it to the outside of the vehicle,
The control means wirelessly captures the vehicle transmission data from the vehicle transmission antenna, generates the code data using the vehicle transmission data as the reply request, and outputs the code data to the control unit to perform the control. The electronic key system according to any one of claims 1 to 7, wherein the unit is allowed or executed to lock and unlock the door lock. The transmission antenna is an in-car transmission antenna that inputs in-vehicle transmission data for generating a reply request from the control unit, generates the reply request, and transmits it to the car.
The control means captures the in-vehicle transmission data from the in-vehicle transmission antenna, generates the code data based on the in-vehicle transmission data as the reply request, and outputs the code data to the control unit for the control The electronic key system according to claim 1, wherein the unit is allowed to start the engine. When the portable device receives a reply request that the vehicle-side transmission antenna transmits wirelessly, the portable device returns the first identification code of the portable device by itself, and the vehicle receives the first identification code by the reception antenna. The control unit for controlling various vehicle operations of the vehicle collates the first identification code on the portable device side with the first identification code on the vehicle side, and if the collation is established, permits the various vehicle operations or A communication unit that can be retrofitted to the vehicle to be executed,
Multi-purpose data for each use is managed in its own memory, and a communication terminal capable of performing wireless communication with a plurality of wireless communication targets by itself by performing wireless communication with the wireless communication target in units of each use;
When the second identification code provided on the vehicle and transmitted by the communication terminal via the wireless communication is received by its own communication antenna, the second identification code on the terminal side and the second identification code on the vehicle side are collated. Matching means to
When the verification of the second identification code is established by the verification means provided in the vehicle, the code data of the first identification code is output to the control unit instead of the portable device, and the control unit A communication unit comprising control means for establishing verification of the first identification code.

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