JP6048185B2 - Door locking system, wireless transmission device, and wireless communication device - Google Patents

Description

  The present invention relates to a door locking system, a wireless transmission device, and a wireless communication device that can control a door key of a vehicle or the like by wireless transmission and reception.

  When a push operation to the operation part of the door locking control device provided on the door of the vehicle is performed, wireless communication is performed with a portable wireless communication device, and the vehicle door is automatically locked or unlocked. A so-called smart entry (registered trademark) system has been put into practical use.

  Smart entry systems include attacks that use vulnerabilities in systems known as relay attacks. First, in a situation where the wireless communication device is separated from the vehicle, the repeater relays a wireless signal transmitted from the vehicle between the vehicle and the wireless communication device. The wireless communication device that has received the relayed wireless signal transmits a response signal including identification information to the vehicle. The door locking control device that has received the response signal collates the identification information of the wireless communication device with the identification information of the door locking control device. Since the identification information is transmitted from the original wireless communication device, the door locking control device naturally unlocks the vehicle door, and the user of the repeater can enter the vehicle.

  As a countermeasure against such a relay attack, Patent Document 1 describes a technique in which a door locking control device controls unlocking of a door based on a delay time of wireless communication. Specifically, the door locking control device measures the delay time of wireless communication. A technique is described in which the door locking control device determines that wireless communication has been relayed when the delay time is not within an allowable range assumed in normal operation, and the door locking control device prohibits the door from being unlocked.

JP 2012-175518 A

  However, when the distance between the vehicle and the owner is short, the door locking control device described in Patent Document 1 cannot prevent a relay attack because the delay time is short. The case where the distance between the vehicle and the owner is close is, for example, the case where the owner is inside a nearby building after the vehicle is parked in the parking lot. Further, when the owner is inside the building, it becomes difficult to hear a warning sound or a hazard of the vehicle, so that there is a high possibility that the vehicle will be stolen by the relay attack.

  The present invention has been made in view of such circumstances, and the object of the present invention is to provide a relay attack by prohibiting transmission of a radio signal when a radio communication device enters the building. An object of the present invention is to provide a door locking system, a wireless transmission device and a wireless communication device that can prevent vehicle theft.

  The door locking system according to the present invention includes a portable wireless communication device having a transmission / reception unit that receives a calling signal and transmits a response signal to the calling signal, transmits the calling signal to the wireless communication device, and transmits the wireless signal to the wireless communication device. In a door locking system including a door locking control device that controls a door key of a vehicle by receiving the response signal transmitted from a communication device, the wireless transmission device that transmits a wireless signal to the wireless communication device is a building An opening / closing detection unit for detecting an opening / closing operation of the door, a prohibition signal for prohibiting transmission of the response signal in the transmission / reception unit, a generation unit for generating a permission signal for permitting transmission, and identification information for identifying itself When the opening / closing detection unit detects an opening / closing operation of the building door, the prohibition signal and the permission signal added with the identification information are added to the prohibition signal and the permission signal. The wireless communication device includes a reception unit that receives the prohibition signal and the permission signal, a storage unit that stores the identification information, and the prohibition signal or the When the permission signal is received, the determination unit that determines whether the identification information added to the prohibition signal or the permission signal matches the identification information stored in the storage unit, and the determination unit matches A control unit that prohibits or permits the transmission / reception unit to transmit the response signal based on the prohibition signal or the permission signal.

  In the present invention, the portable wireless communication device has a transmission / reception unit that receives a call signal and transmits a response signal to the call signal. The door locking control device transmits a calling signal to the wireless communication device and receives a response signal transmitted from the wireless communication device, thereby controlling the key of the vehicle door. In the wireless transmission device, the opening / closing detection unit detects an opening / closing operation of a building door. The generation unit of the wireless transmission device generates a prohibition signal for prohibiting transmission of the response signal and a permission signal for permitting transmission in the transmission / reception unit. The identification information adding unit of the wireless transmission device adds identification information for identifying itself to the prohibition signal and the permission signal. When the opening / closing detection unit detects an opening / closing operation of a building door, the transmission unit of the wireless transmission device alternately transmits a prohibition signal and a permission signal added with identification information. The receiving unit of the wireless communication device receives the prohibition signal and the permission signal. The storage unit of the wireless communication device stores identification information. When the prohibition signal or the permission signal is received by the reception unit of the wireless communication device, does the determination unit of the wireless communication device match the identification information added to the prohibition signal or the permission signal and the identification information stored in the storage unit? Determine whether or not. If the determination unit determines that they match, the control unit of the wireless communication device prohibits or permits the transmission / reception unit of the wireless communication device to transmit a response signal based on the prohibition signal or the permission signal.

  In the door locking system according to the present invention, the transmission unit further transmits the prohibition signal or the permission signal at a predetermined time interval.

  In the present invention, in the door locking system, the transmission unit further transmits the prohibition signal or the permission signal at a predetermined time interval.

  The door locking system according to the present invention includes a portable wireless communication device having a transmission / reception unit that receives a calling signal and transmits a response signal to the calling signal, transmits the calling signal to the wireless communication device, and transmits the wireless signal to the wireless communication device. In a door locking system including a door locking control device that controls a key of a vehicle door by receiving the response signal transmitted from a communication device, a plurality of wireless transmission devices that transmit a wireless signal to the wireless communication device include: A radio signal generating unit, an identification information adding unit for adding identification information for identifying the radio signal to the plurality of radio signals, and a radio signal installed in the building and transmitting the identification information An internal transmission unit, an external transmission unit installed outside the building, for transmitting the radio signal, and a plurality of radio signals to which the identification information is added by the internal transmission unit and the external transmission unit. A transmission control unit that controls to perform next transmission, the wireless communication device, a reception unit that receives the plurality of wireless signals sequentially transmitted from the wireless transmission device, a storage unit that stores the identification information, A detection unit that detects the signal strength of the plurality of radio signals received by the reception unit, and whether or not the identification information added to the plurality of radio signals matches the identification information stored in the storage unit When the identification information determination unit and the identification information determination unit determine that they match, the wireless signals transmitted by the internal transmission unit and the external transmission unit are determined based on the order of the plurality of wireless signals, and the detection When the signal strength of the radio signal transmitted by the internal transmitter is strong, the response signal is prohibited from being transmitted and transmitted by the external transmitter. Radio signal No. If the intensity was strong, and a controlling unit for permitting transmission of said response signal.

  In the present invention, the portable wireless communication device has a transmission / reception unit that receives a call signal and transmits a response signal to the call signal. The door locking control device transmits a calling signal to the wireless communication device and receives a response signal transmitted from the wireless communication device, thereby controlling the key of the vehicle door. The generation unit of the wireless transmission device generates a plurality of wireless signals. The identification information adding unit of the wireless transmission device adds identification information for identifying itself to a plurality of wireless signals. The internal transmission unit of the wireless transmission device is installed inside the building and transmits a wireless signal with identification information added thereto. The external transmission unit of the wireless transmission device is installed outside the building and transmits a wireless signal. The transmission control unit of the wireless transmission device controls the internal transmission unit and the external transmission unit to sequentially transmit a plurality of wireless signals with identification information added thereto. The receiving unit of the wireless communication device receives the plurality of wireless signals sequentially transmitted from the wireless transmission device. The storage unit of the wireless communication device stores identification information. The detection unit of the wireless communication device detects the signal strength of a plurality of wireless signals received by the reception unit. The identification information determination unit of the wireless communication device determines whether or not the identification information added to the plurality of wireless signals matches the identification information stored in the storage unit. When it is determined by the identification information determination unit of the wireless communication device that the data match, the control unit of the wireless communication device determines the wireless signal transmitted by the internal transmission unit and the external transmission unit according to the order of the plurality of wireless signals, and the detection unit If the signal strength of the radio signal transmitted by the internal transmitter is strong, the response signal is prohibited from being transmitted and the radio signal transmitted by the external transmitter is When the signal strength is strong, transmission of a response signal is permitted.

  In the door locking system according to the present invention, the wireless transmission device includes an opening / closing detection unit that detects an opening / closing operation of a building door, and the transmission control unit detects the opening / closing operation of the building door. In this case, the plurality of radio signals are sequentially transmitted.

  In the present invention, the wireless transmission device includes an opening / closing detection unit that detects an opening / closing operation of a building door, and the transmission control unit has a plurality of wireless devices when the opening / closing detection unit detects an opening / closing operation of the building door. Send signals sequentially.

  The door locking system according to the present invention is characterized in that the transmission control unit is configured to sequentially transmit a plurality of radio signals at a predetermined time interval.

  In the present invention, the transmission control unit sequentially transmits a plurality of radio signals at a predetermined time interval.

  In the door locking system according to the present invention, the wireless communication device receives an operation related to unlocking a door of a vehicle, and when the operation unit receives an operation, the transmission / reception unit transmits the response signal. And a transmission permission unit for permitting the transmission.

  In the present invention, when the operation unit of the wireless communication device receives an operation related to unlocking the door of the vehicle, the transmission permission unit of the wireless communication device transmits a response signal at the transmission / reception unit. Allow.

  The wireless transmission device according to the present invention includes an open / close detection unit that detects an opening / closing operation of a building door, a prohibition signal that prohibits transmission of a radio signal, and a generation unit that generates a permission signal that permits transmission of the radio signal. An identification information adding unit for adding identification information for identifying itself to the prohibition signal and the permission signal, and the prohibition signal to which the identification information is added when the opening / closing detection unit detects an opening / closing operation of the building door And a transmission unit that alternately transmits the permission signal.

  In the present invention, the open / close detection unit of the wireless transmission device detects an opening / closing operation of a building door. The generation unit of the wireless transmission device generates a prohibition signal for prohibiting transmission of a radio signal and a permission signal for permitting transmission of the radio signal. The identification information adding unit of the wireless transmission device adds identification information for identifying itself to the prohibition signal and the permission signal. When the opening / closing detection unit of the wireless transmission device detects an opening / closing operation of the building door, the transmission unit of the wireless transmission device alternately transmits a prohibition signal and a permission signal with identification information added thereto.

  A wireless communication device according to the present invention is a portable wireless communication device having a transmission / reception unit that receives a call signal and transmits a response signal to the call signal, and a plurality of wireless signals transmitted inside and outside the building. Added to the plurality of radio signals, a storage unit for storing identification information for identifying itself, a detection unit for detecting signal strength of the plurality of radio signals received by the receiver, and When it is determined by the identification information determination unit that the identification information and the identification information stored in the storage unit match, and when the identification information determination unit determines that they match, the order of the plurality of radio signals When the radio signal transmitted inside and outside the building is discriminated, the signal strength of the radio signal detected by the detector is compared, and the signal strength of the radio signal transmitted inside the building is strong , Said response Prohibits the transmission of the signal, when the signal strength of a radio signal transmitted at the outside of the building was strong, and a control unit for permitting transmission of said response signal.

  In the present invention, the transmission / reception unit of the portable wireless communication device receives the call signal and transmits a response signal to the call signal. The receiving unit receives a plurality of radio signals transmitted inside and outside the building. The storage unit stores identification information for identifying itself. The detection unit detects the signal strength of a plurality of radio signals received by the reception unit. The identification information determination unit determines whether the identification information added to the plurality of radio signals matches the identification information stored in the storage unit. When it is determined by the identification information determination unit that they match, the control unit determines the radio signal transmitted inside and outside the building according to the order of the plurality of radio signals, and determines the signal strength of the radio signal detected by the detection unit. In comparison, if the signal strength of the radio signal transmitted inside the building is strong, transmission of the response signal is prohibited, and if the signal strength of the radio signal transmitted outside the building is strong, the response signal Allow transmission.

  In the case of the present invention, the wireless communication device controls the response signal to the door locking device based on the wireless signal transmitted from the wireless transmission device installed on the door or window of the building, so that the wireless communication device is in the building. Even if it is inside the vehicle, it is possible to prevent vehicle theft by a relay attack.

It is a block diagram which shows the example of 1 structure of the door locking system which concerns on Embodiment 1. FIG. 3 is a block diagram illustrating a configuration example of a radio device according to Embodiment 1. FIG. 3 is a block diagram illustrating a configuration example of a wireless transmission device according to Embodiment 1. FIG. It is a schematic diagram for demonstrating operation | movement in case the radio | wireless machine which concerns on Embodiment 1 exists in the exterior of a building. It is a schematic diagram for demonstrating operation | movement in case the radio | wireless machine which concerns on Embodiment 1 exists in the inside of a building. 4 is a flowchart showing a procedure of door unlocking processing according to the first embodiment. 4 is a flowchart showing a procedure of door unlocking processing according to the first embodiment. 4 is a flowchart showing a procedure of door unlocking processing according to the first embodiment. 4 is a flowchart showing a procedure of door unlocking processing according to the first embodiment. 10 is a flowchart illustrating a procedure of door unlocking processing performed by the wireless transmission device according to the second embodiment. FIG. 10 is a block diagram illustrating a configuration example of a wireless transmission device according to a third embodiment. FIG. 10 is a block diagram illustrating a configuration example of a wireless device according to a third embodiment. 10 is a schematic diagram illustrating an operation of a radio device according to Embodiment 3. FIG. 12 is a flowchart illustrating a procedure of door unlocking processing according to the third embodiment. 12 is a flowchart illustrating a procedure of door unlocking processing according to the third embodiment. 14 is a flowchart illustrating a procedure of door unlocking processing performed by the wireless transmission device according to the fourth embodiment.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings illustrating the embodiment.
FIG. 1 is a block diagram illustrating a configuration example of a door locking system 100 according to the first embodiment. FIG. 2 is a block diagram illustrating a configuration example of the wireless device 2 according to the first embodiment. FIG. 3 is a block diagram illustrating a configuration example of the wireless transmission device 3 according to the first embodiment. The door locking system 100 includes a door locking control device 1 mounted on a vehicle 7, a portable radio device 2, and a wireless transmission device 3 installed on a door or window of a building 8. The wireless device 2 functions as a wireless communication device of the present invention. Details of the door locking control device 1 constituting the door locking system 100 are shown in FIG. 1, details of the wireless device 2 are shown in FIG. 2, and details of the wireless transmission device 3 are shown in FIG.

  The door locking system 100 includes a door locking control device 1, a wireless device 2, and a wireless transmission device 3, and the door locking control device 1 is connected to a locking mechanism 41 and an operation unit 42. The door locking control device 1 locks or unlocks the door by driving the locking mechanism 41 when receiving a user operation on the operation unit 42 provided in the door of the vehicle 7 or in the vicinity of the door. . The door locking control device 1 has a function of transmitting and receiving wireless signals to and from the wireless device 2. The wireless device 2 has a function of transmitting and receiving wireless signals to and from the door locking control device 1, and the wireless device 2 receives wireless signals from the wireless transmission device 3. The wireless transmission device 3 is installed on the door or window of the building 8 and has a function of transmitting a wireless signal to the wireless device 2. Radio signals transmitted from the door locking control device 1, the radio device 2, and the radio transmission device 3 can be transmitted and received within a limited radio reachable range (for example, a range of several tens of meters) to which the radio signal reaches.

  The locking mechanism 41 includes a mechanical mechanism for locking or unlocking the door of the vehicle 7, a power source such as a motor or an actuator for operating the mechanical mechanism, and a drive circuit for driving the power source. The The locking mechanism 41 locks or unlocks the door of the vehicle 7 when the door locking control device 1 gives a control signal to the drive circuit of the locking mechanism 41. The locking mechanism 41 feeds back a signal indicating the operation amount of the mechanical mechanism or the power source to the door locking control device 1. The door locking control device 1 can acquire the operating state of the locking mechanism 41, that is, the locking state of the door of the vehicle 7, by a feedback signal from the locking mechanism 41.

  The operation unit 42 is provided in the door of the vehicle 7 or in the vicinity of the door, and outputs an operation signal to the door locking control device 1 when an operation of the user of the vehicle 7 is received. Examples of the door of the vehicle 7 or the vicinity of the door include a door on the driver's seat side, a door on the passenger seat side, a trunk, a hatch gate, and a rear door. The operation unit 42 includes a push switch that accepts a push operation, a sensor that accepts a contact operation, and the like. The operation unit 42 detects a user operation and notifies the door locking control device 1 of the operation.

  The door locking control device 1 includes a CPU (Central Processing Unit) 10, an input / output unit 11, a storage unit 12, and the like. The CPU 10, the input / output unit 11, the storage unit 12, and the transmission / reception unit 13 are connected on the bus L. The door locking control device 1 may be realized as a microcomputer. The input / output unit 11 is connected to the locking mechanism 41 and the operation unit 42. The locking mechanism 41 outputs a feedback signal to the CPU 10 via the input / output unit 11. When the operation unit 42 receives a user operation, the operation unit 42 outputs an operation signal to the CPU 10 via the input / output unit 11.

  The storage unit 12 includes a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM is a nonvolatile memory element such as an EEPROM (Electrically Erasable Programmable ROM) or a flash memory. The RAM is composed of a volatile memory element such as SRAM (Static Random Access Memory) or DRAM (Dynamic Random Access Memory). The storage unit 12 stores in advance various data required when the CPU 10 performs processing, such as the identification information file 12a, and a control program 12b executed by the CPU 10. The identification information file 12 a includes first identification information unique to the door locking control device 1. The first identification information may be encrypted.

  When an operation signal is input from the operation unit 42 via the input / output unit 11, the CPU 10 reads and executes the control program 12 b stored in advance in the storage unit 12. By executing the control program 12b, the CPU 10 controls the operation of each unit in the door locking control device 1 via the input / output unit 11.

  The transmission / reception unit 13 performs wireless communication with the wireless device 2, and includes an LF (Low Frequency) transmission unit 13a and a UHF (Ultra-High Frequency) reception unit 13b. An LF antenna 14a is connected to the LF transmitter 13a. The LF transmitter 13a transmits a call signal. The calling signal is a radio signal in the LF band (for example, 125 kHz) including the first identification information. The LF transmission unit 13 a converts information (data) such as first identification information output from the CPU 10 into a radio signal and transmits the radio signal to the radio device 2. A UHF antenna 14b is connected to the UHF receiver 13b. The UHF receiver 13b receives a radio signal in the UHF band (for example, 315 MHz), receives a response signal transmitted from the radio device 2 described later, reconverts the received response signal into data, and locks the door. This is given to the control device 1. Note that other short-range wireless communication technologies may be used for the antenna and the communication method.

  The wireless device 2 includes a CPU 20 (control unit), an input unit 21, a storage unit 22, a transmission / reception unit 23, an operation unit 25, and the like. The CPU 20, input unit 21, storage unit 22, and transmission / reception unit 23 are connected on the bus M. The wireless device 2 receives a call signal from the door locking control device 1 by the transmission / reception unit 23 and then transmits a response signal to the door locking control device 1 by the transmission / reception unit 23. When the door locking control device 1 receives the response signal at the transmission / reception unit 23, the door locking control device 1 determines that the wireless device 2 is in the wireless reachable range, and the door locking control device 1 unlocks the door. The input unit 21 is connected to the operation unit 25. When the operation unit 25 receives the operation, the operation unit 25 inputs an operation signal to the CPU 20 via the input unit 21.

  The storage unit 22 includes a ROM and a RAM. The ROM is a non-volatile memory element such as an EEPROM or a flash memory. The RAM is composed of a volatile memory element such as SRAM or DRAM. Data such as the identification information file 22a is stored in the storage unit 22 in advance. The identification information file 22 a includes second identification information unique to the wireless device 2 and is used for authentication processing between the door locking control device 1, the wireless device 2, and the wireless transmission device 3. The second identification information may be encrypted.

  The CPU 20 reads out and executes the control program 22b stored in advance in the storage unit 22, thereby performing control processing for each unit in the wireless device 2. CPU20 will be in a transmission prohibition state or a transmission permission state based on the radio signal transmitted from the wireless transmission device 3 mentioned later. The transmission prohibited state is a state in which the CPU 20 prohibits the transmission / reception unit 23 from transmitting a response signal, and the transmission permitted state is a state in which the CPU 20 permits the transmission / reception unit 23 to transmit a response signal. The transmission prohibited state or the transmission permitted state is temporarily stored in the storage unit 22.

  The transmission / reception unit 23 performs wireless communication between the door locking control device 1 and the wireless device 2 under the control of the CPU 20, and includes an LF reception unit 23a (reception unit) and a UHF transmission unit 23b. . An LF antenna 24a is connected to the LF receiver 23a. The LF receiving unit 23a receives a radio signal in the LF band, and the LF receiving unit 23a receives a call signal transmitted from the door locking control device 1 and a radio signal from a radio transmitting device 3 described later. The LF receiver 23a converts the received radio signal into data and gives it to the CPU 20.

  A UHF antenna 24b is connected to the UHF transmitter 23b. The UHF transmission unit 23 b converts information (data) such as second identification information output from the CPU 20 into a radio signal and transmits the radio signal to the door locking control device 1. The UHF transmitter 23b transmits a response signal according to the input control signal of the CPU 20. The response signal is a UHF band radio signal including second identification information. The transmitted response signal is received by the UHF receiver 13b of the door locking control device 1. When the door locking control device 1 receives the response signal at the UHF receiving unit 13b, the CPU 10 of the door locking control device 1 receives the second identification information added to the response signal and the first identification information stored in the storage unit 12. It is determined whether or not they match. When the CPU 20 determines that the identification information matches, the CPU 20 unlocks the door locking control device 1.

  The operation unit 25 includes a push switch that accepts a push operation or a sensor that accepts a contact operation, and outputs a user operation signal to the CPU 20. When the operation unit 25 is operated, the operation unit 25 changes the transmission prohibited state of the CPU 20 to the transmission permitted state.

  The wireless transmission device 3 includes a CPU 30, an input unit 31, a storage unit 32, an LF transmission unit 33 (transmission unit), a timer unit 35, an open / close detection unit 36, and the like. The CPU 30, the input unit 31, the storage unit 32, the LF transmission unit 33, and the time measuring unit 35 are connected on the bus N. When the opening / closing detection unit 36 detects an opening / closing operation of the door or window, the wireless transmission device 3 transmits a prohibition signal for prohibiting transmission of a response signal to the wireless device 2 or an permission signal for permitting transmission of the response signal to the wireless device 2. To do.

  The open / close detection unit 36 detects an opening / closing operation of the door or window by a switch or a sensor provided on the door or window of the building 8 and outputs the detection result to the CPU 30 via the input unit 31. The open / close detection unit 36 is, for example, a magnet sensor. The magnet sensor includes a magnet and a reed switch. When the magnet approaches or leaves the reed switch, the reed switch is opened and closed, and the magnet sensor detects that the door or window has been opened and closed. The open / close detection unit 36 may be an infrared sensor installed in the opening of the building 8. The infrared sensor irradiates near-infrared rays and detects entry / exit from the opening of the user's building 8 based on the amount of change due to reflection or transmission.

  The input unit 31 is connected to the open / close detection unit 36. When the opening / closing detection unit 36 detects an opening / closing operation of the door or window, the detection result is input to the CPU 30 via the input unit 31. In this embodiment, an example in which a detection result is output each time an opening / closing operation is detected will be described. However, the present invention is not limited to this. After detecting the opening / closing operation of the door or window, the opening / closing detection unit 36 may not accept the detection of the opening / closing operation of the door or window for a predetermined time. The predetermined time is stored in the storage unit 32 and is, for example, one minute.

  The storage unit 32 includes a ROM and a RAM. The ROM is a non-volatile memory element such as an EEPROM or a flash memory. The RAM is composed of a volatile memory element such as SRAM or DRAM. The storage unit 32 stores data such as the identification information file 32a in advance. The identification information file 32 a includes third identification information unique to the wireless transmission device 3 and is used for authentication processing with the wireless device 2. Note that the third identification information may be encrypted.

  The CPU 30 is an arithmetic processing device that performs control processing of each unit in the wireless transmission device 3 by reading and executing the control program 32 b stored in advance in the storage unit 32. The CPU 30 generates a prohibition signal for prohibiting transmission of a response signal or a permission signal for permitting the wireless device 2 to transmit a response signal. The CPU 30 adds third identification information for identifying itself to the prohibition signal and the permission signal. The time measuring unit 35 measures the current time, for example, the time, and outputs the time measurement result to the CPU 30 in accordance with a request from the CPU 30.

  The LF transmission unit 33 performs wireless communication with the wireless device 2 in accordance with a control signal input from the CPU 30. An LF antenna 34 is connected to the LF transmitter 33. The LF transmission unit 33 transmits a prohibition signal and a permission signal in the LF transmission unit 33 according to a control signal of the CPU 30. The transmitted prohibition signal or permission signal is received by the LF receiver 23a. When the wireless device 2 receives the prohibition signal or the permission signal at the LF receiver 23a, the CPU 20 matches the third identification information added to the prohibition signal or the permission signal with the second identification information stored in the storage unit 22. It is determined whether or not. When the CPU 20 determines that the identification information matches, the CPU 20 prohibits or permits the transmission / reception unit 23 to transmit a response signal based on the prohibition signal or the permission signal. In the wireless communication in the present invention, the LF band and the UHF band are used, but different frequency bands may be used.

  FIG. 4 is a schematic diagram for explaining the operation when the wireless device 2 according to the first embodiment is outside the building 8. As shown in FIG. 4, the portable wireless device 2 exists outside the building 8. First, the wireless device 2 goes out of the building 8 through the door or window of the building 8. The open / close detection unit 36 detects an opening / closing operation of the door or window of the building 8 and inputs an operation signal to the CPU 30 via the input unit 31. The CPU 30 transmits a permission signal at the LF transmitter 33. The transceiver unit 23 of the wireless device 2 receives the permission signal. When the third identification information added to the permission signal matches the stored second identification information, the CPU 20 of the wireless device 2 permits transmission of the response signal. If the user opens / closes the door or window of the building 8 without having the radio 2, the open / close detection unit 36 may detect the opening / closing operation of the door or window of the building 8 and transmit a permission signal. The wireless device 2 cannot receive the permission signal, and the wireless device 2 does not permit transmission of the response signal.

  Next, the user approaches the vehicle 7 and operates the operation unit 42 of the door locking control device 1. The transmission / reception unit 13 of the door locking control device 1 that has detected the operation of the operation unit 42 transmits a call signal. The transceiver unit 23 of the wireless device 2 receives a call signal from the outside of the building 8. The CPU 20 of the wireless device 2 determines whether or not the first identification information added to the calling signal matches the second identification information stored in the storage unit 22. Since the CPU 20 of the wireless device 2 determines that the identification information matches, and the CPU 20 of the wireless device 2 permits transmission of the response signal, the transmission / reception unit 23 of the wireless device 2 transmits the response signal. CPU10 of the door locking control apparatus 1 which received the response signal determines whether the 2nd identification information added to the calling signal and the stored 1st identification information correspond. The CPU 10 of the door locking control device 1 determines that the identification information matches, and the door locking control device 1 unlocks the door.

  FIG. 5 is a schematic diagram for explaining the operation in the case where the radio device 2 according to Embodiment 1 is inside the building 8. As shown in FIG. 5, the wireless device 2 and the wireless transmission device 3 exist inside the building 8, and the relay device 50 and the relay device 51 exist between the vehicle 7 and the wireless device 2.

  In FIG. 5, the case where the wireless transmission device 3 does not exist is considered. The user approaches the vehicle 7 and operates the operation unit 42 of the door locking control device 1. The transmission / reception unit 13 of the door locking control device 1 that has detected the operation of the operation unit 42 transmits a call signal. The repeater 50 receives the call signal, and further transmits the call signal relayed via the repeater 51 to the wireless device 2.

  The transmitter / receiver 23 of the wireless device 2 inside the building 8 receives the call signal. The CPU 20 of the wireless device 2 determines that the first identification information added to the call signal matches the stored second identification information, and the transceiver unit 23 of the wireless device 2 transmits a response signal. Upon receiving the response signal, the door locking control device 1 determines that the CPU 10 of the door locking control device 1 matches the second identification information added to the response signal with the first identification information stored in the storage unit 12. The door locking control device 1 unlocks the door.

  Next, consider a case where the wireless transmission device 3 exists. First, the radio 2 enters the inside of the building 8 through the door or window of the building 8. The open / close detection unit 36 of the wireless transmission device 3 detects the opening / closing operation of the door or window of the building 8, and the LF transmission unit 33 of the wireless transmission device 3 transmits a prohibition signal. The transceiver unit 23 of the wireless device 2 receives the prohibition signal. When the CPU 20 of the wireless device 2 determines that the third identification information added to the prohibition signal matches the second identification information stored in the storage unit 22, the wireless device 2 prohibits transmission of the response signal. If the user opens / closes the door or window of the building 8 without having the radio 2, the open / close detection unit 36 may detect the opening / closing operation of the door or window of the building 8 and transmit a prohibition signal. The wireless device 2 cannot receive the prohibition signal, and the wireless device 2 does not prohibit the transmission of the response signal.

  The user operates the operation unit 42 of the door locking control device 1. The door locking control device 1 that has detected the operation transmits a call signal. The repeater 50 receives the call signal, and further transmits the call signal relayed via the repeater 51 to the wireless device 2.

  The transmitter / receiver 23 of the wireless device 2 inside the building 8 receives the call signal. The CPU 20 of the wireless device 2 determines that the first identification information added to the calling signal matches the second identification information stored in the storage unit 22. However, since the CPU 20 of the wireless device 2 prohibits transmission of the response signal, the transmitting / receiving unit 23 of the wireless device 2 does not transmit the response signal, and the door locking control device 1 does not unlock the door.

  6, 7, 8, and 9 are flowcharts illustrating the procedure of the door unlocking process according to the first embodiment. The flag used in FIG. 6 and FIG. 8 described later is set to 0 in the initial state, for example. When the flag is 0, the wireless device 2 is present inside the building, and when the flag is 1, the wireless device 2 is present outside the building. These flags are all stored in the storage unit 32. The CPU 30 determines whether or not the opening / closing detection unit 36 has detected an opening / closing operation of the door or window (step S1). When the CPU 30 determines that the opening / closing detection unit 36 has not detected (S1: NO), the CPU 30 waits until the opening / closing detection unit 36 detects it. When the CPU 30 determines that the opening / closing detection unit 36 has detected (S1: YES), the CPU 30 determines whether or not the flag is 0 (step S2).

  If the CPU 30 determines that the flag is 0 (S2: YES), it sets the flag to 1 (step S3). The CPU 30 generates a permission signal (step S4). The CPU 30 adds the third identification information to the permission signal (step S5). If the CPU 30 determines that the flag is not 0 (S2: NO), it sets the flag to 0 (step S6). The CPU 30 generates a prohibition signal (step S7). The CPU 30 adds the third identification information to the prohibition signal (step S8). CPU30 transmits the prohibition signal or permission signal which added 3rd identification information to the radio | wireless machine 2 from the LF transmission part 33 (step S9). After the process of S9, the CPU 30 returns to S1 again and continues the process.

  CPU20 receives the prohibition signal or permission signal which added 3rd identification information in LF receiving part 23a (step S10). The CPU 20 performs an authentication process based on the third identification information included in the received prohibition signal or permission signal and the second identification information stored in the storage unit 22 (step S11).

  The CPU 20 determines whether the authentication is successful, that is, whether the third identification information included in the received prohibition signal or permission signal matches the second identification information stored in the storage unit 22 (step S12). ). If the third identification information and the second identification information do not match (S12: NO), the CPU 20 shifts the process to S20 and waits until a call signal is received. When the third identification information matches the second identification information (S12: YES), the CPU 20 determines whether either the permission signal or the prohibition signal has been received (step S13).

  When it is determined that the CPU 20 has received the permission signal (S13: YES), it is determined that the wireless device 2 is outside the building 8, and the CPU 20 enters a transmission permission state (step S14). When the CPU 20 determines that the prohibition signal is received (S13: NO), the CPU 20 determines that the wireless device 2 is inside the building 8, and the CPU 20 is in a transmission prohibition state (step S15).

  The CPU 10 of the door locking control device 1 determines whether or not there is a user operation on the operation unit 42 based on whether or not an operation signal is input from the operation unit 42 via the input unit 11 (step S16). When no operation signal is input from the operation unit 42 (S16: NO), the CPU 10 stands by until an operation signal is input. When the operation signal is input from the operation unit 42 (S16: YES), the CPU 10 generates a calling signal (step S17). The CPU 10 adds the first identification information to the calling signal (step S18). The CPU 10 transmits a calling signal to which the first identification information is added from the LF transmission unit 13a to the wireless device 2 (step S19). The CPU 20 of the wireless device 2 receives the calling signal with the first identification information added by the LF receiving unit 23a (step S20).

  The CPU 20 performs an authentication process based on the first identification information included in the received call signal and the second identification information stored in the storage unit 22 (step S21). The CPU 20 determines whether or not the authentication is successful, that is, whether or not the first identification information included in the received call signal matches the second identification information stored in the storage unit 22 (step S22). If the CPU 20 determines that the first identification information and the second identification information do not match (S22: NO), the process ends. When it is determined that the first identification information and the second identification information match (S22: YES), the CPU 20 determines whether or not the transmission is permitted (step S23). CPU20 produces | generates a response signal, when it is a transmission permission state (S23: YES) (step S25). The CPU 20 adds the second identification information to the response signal (step S26). CPU20 transmits the response signal which added 2nd identification information to the door locking control apparatus 1 (step S27).

  When the CPU 20 is in a transmission prohibited state (S23: NO), the CPU 20 determines whether or not there is a user operation on the operation unit 25 based on whether or not an operation signal is input from the operation unit 25 (step S24). CPU20 complete | finishes a process, when the operation signal is not input from the operation part 25 (S24: NO). When the operation signal is input from the operation unit 25 (S24: YES), the CPU 20 forcibly changes from the transmission prohibited state to the transmission permitted state, and the CPU 20 generates a response signal (step S25). The CPU 20 adds the second identification information to the response signal (step S26). The CPU 20 transmits a response signal with the second identification information added (step S27). CPU10 of a door locking control apparatus receives the response signal which added 2nd identification information in the UHF receiving part 13b (step S28).

  The CPU 10 performs an authentication process based on the second identification information included in the received response signal and the first identification information stored in the storage unit 12 (step S29). Next, the CPU 10 determines whether or not the authentication is successful, that is, whether or not the second identification information included in the received response signal matches the first identification information stored in the storage unit 12 (step S30). When the second identification information does not match the first identification information (S30: NO), the CPU 10 ends the process. When the second identification information matches the first identification information (S30: YES), the CPU 10 unlocks the door by giving a control signal to the locking mechanism 41 (step S31). The CPU 10 ends the process. In the present embodiment, the first identification information, the second identification information, and the third identification information are described as being the same, but the present invention is not limited to this. The first identification information, the second identification information, and the third identification information may be different. In this case, the first identification information and the second identification information may be stored in the storage unit 22 of the wireless device 2 in association with each other. Moreover, what is necessary is just to memorize | store correspondence with 2nd identification information and 3rd identification information in the memory | storage part 12 of the door locking control apparatus 1. FIG.

  Thus, in the door locking system according to the first embodiment, when the wireless device 2 possessed by the user is inside the building 8, the wireless device 2 that transmits the prohibition signal from the wireless transmission device 3 and receives the prohibition signal is Then, the CPU 20 is set in a transmission prohibited state. Therefore, even if the radio device 2 receives the calling signal inside the building via the relay device, the radio device 2 does not transmit a response signal, and the door locking system according to the first embodiment prevents the vehicle theft by the relay attack. Can be prevented.

  As described above, in the door locking system according to the first embodiment, even when the CPU 20 of the wireless device 2 is in the transmission prohibited state, when the operation signal is input from the operation unit 26, the CPU 20 is forcibly in the transmission permitted state. become. Therefore, when the wireless device 2 possessed by the user is outside the building 8, the door of the vehicle 7 can be unlocked even if the wireless device 2 is in a transmission prohibited state due to a malfunction of the system.

(Embodiment 2)
In the first embodiment, the wireless transmission device 3 is configured to transmit a prohibition signal or a permission signal when an opening / closing operation of a door or window is detected. The wireless transmission device 3 according to the second embodiment may transmit a prohibition or permission signal at predetermined time intervals.

  FIG. 10 is a flowchart illustrating a procedure of door unlocking processing performed by the wireless transmission device 3 according to the second embodiment. In the following, the configuration and operation other than those specifically described are the same as those of the first embodiment, and the description is omitted for the sake of brevity.

  The CPU 30 of the wireless transmission device 3 measures time by the time measuring unit 35 and determines whether or not a predetermined time interval for transmitting the prohibition signal or the permission signal has been reached (step S40). The predetermined time interval is stored in the storage unit 32 and is, for example, several seconds to several tens of seconds.

  When it is determined that the predetermined time interval has not been reached (S40: NO), the CPU 30 determines whether the opening / closing detection unit 36 has detected an opening / closing operation of the door or window (step S41). When the opening / closing detection unit 36 does not detect the opening / closing operation of the door or window (S41: NO), the CPU 30 returns the processing to S40 and continues the processing until a predetermined time elapses or the opening / closing detection unit 36 detects. . CPU30 determines whether a flag is 0, when the opening / closing detection part 36 detects opening / closing operation of a door or a window (S41: YES) (step S42). When the flag is 0 (S42: YES), the CPU 30 sets the flag to 1 (step S43). When the flag is 1 (S42: NO), the CPU 30 sets the flag to 0 (step S44), returns the process to S40, and continues the process.

  When the CPU 30 determines that the predetermined time interval has been reached (S40: YES), the CPU 30 determines whether or not the flag is 0 (step S45), and when the CPU 30 is 0 (S45: YES), The CPU 30 generates a prohibition signal (step S46). The CPU 30 adds the third identification information to the prohibition signal (step S47). When the flag is 1 (S45: NO), the CPU 30 generates a permission signal (step S48). The CPU 30 adds the third identification information to the permission signal (step S49).

  CPU30 transmits the prohibition signal or permission signal which added 3rd identification information from LF transmission part 33 (step S50), returns a process to S40, and continues a process.

  Thus, the wireless transmission device 3 transmits a prohibition signal or a permission signal at every predetermined time interval. Therefore, even when the wireless device 2 fails to receive the prohibition signal or permission signal of the wireless transmission device 3, the wireless device 2 can receive the prohibition signal or permission signal after a predetermined time elapses.

(Embodiment 3)
Embodiment 3 of the present invention will be described below in detail with reference to the drawings showing the embodiment. 11 and 12 are block diagrams of the door locking system according to the third embodiment. In the following, the configuration and operation other than those specifically described are the same as those of the first embodiment, and the description is omitted for the sake of brevity.

  FIG. 11 is a block diagram illustrating a configuration example of the wireless transmission device 3 according to the third embodiment. The wireless transmission device 3 according to Embodiment 3 includes one or more internal LF transmission units 33a (internal transmission units) and one or more external LF transmission units 33b (external transmission units). One or more internal LF transmitters 33a are connected to one or more internal LF antennas 34a, and one or more external LF transmitters 33b are connected to one or more external LF antennas 34b.

  The CPU 30 generates a plurality of radio signals. The CPU 30 adds third identification information for identifying itself to the plurality of radio signals. When the opening / closing detection unit 36 detects the opening / closing operation of the building door, the CPU 30 sequentially transmits a plurality of wireless signals in the order stored in the storage unit 32 by the internal LF transmission unit 33a and the external LF transmission unit 33b. Output a control signal.

  FIG. 12 is a block diagram illustrating a configuration example of the wireless device 2 according to the third embodiment. The difference from the first embodiment is that a detection unit 26 is arranged in the LF reception unit 23a. The LF receiver 23a sequentially receives the radio signals transmitted from the internal LF transmitter 33a and the external LF transmitter 33b. The detection unit 26 outputs the signal strengths of the plurality of wireless signals received sequentially to the CPU 20.

  The detection unit 26 is, for example, a known RSSI (Received Signal Strength Indicator). The RSSI detects the signal level of the received signal by rectifying the radio signal received by the LF receiver 23a. The CPU 20 compares the input signal strengths and determines the distance between the wireless transmission device 3 and the wireless device 2 using, for example, RSS (Received Signal Strength). The storage unit 22 stores the order of radio signals transmitted by the internal LF transmission unit 33a or the external LF transmission unit 33b.

  FIG. 13 is a schematic diagram illustrating the operation of the radio device 2 according to the third embodiment. As shown in FIG. 13, the portable wireless device 2 is installed outside or inside the building 8. The wireless transmission device 3 is installed on the door or window of the building 8. The internal LF transmitter 33a and the internal LF antenna 34a of the wireless transmission device 3 are installed inside the building, and the external LF transmitter 33b and the external LF antenna 34b are installed outside the building.

  First, the radio device 2 owned by the user goes out of the building 8 through the door or window of the building 8. The open / close detection unit 36 of the wireless transmission device 3 detects an opening / closing operation of a door or window, and outputs an operation signal to the CPU 30 of the wireless transmission device 3. The CPU 30 to which the operation signal is input sequentially transmits a plurality of radio signals from the internal LF transmitter 33a and the external LF transmitter 33b. The transceiver unit 23 of the wireless device 2 sequentially receives the radio signals transmitted from the internal LF transmission unit 33a and the external LF transmission unit 33b. The CPU 20 of the wireless device 2 performs an authentication process based on the third identification information included in the received wireless signal and the second identification information stored in the storage unit 22. When the CPU 20 determines that the identification information matches, the CPU 20 determines the radio signals transmitted by the internal LF transmitter 33a and the external LF transmitter 33b according to the order of reception, and detects the signal strength of each radio signal. . The CPU 20 compares the signal strengths of the respective radio signals. Since the external LF antenna 34b is closer to the radio 2 than the internal LF antenna 34a, it is determined that the radio signal transmitted by the external LF transmitter 33b is stronger than the radio signal transmitted by the internal LF transmitter 33a due to distance attenuation. . In this case, the radio device 2 is identified as being outside the building 8 and permits transmission of a response signal.

  Next, the radio device 2 possessed by the user enters the inside of the building 8 through the door or window of the building 8. The open / close detection unit 36 of the wireless transmission device 3 detects an opening / closing operation of a door or window, and outputs an operation signal to the CPU 30 of the wireless transmission device 3. The CPU 30 to which the operation signal is input sequentially transmits a plurality of radio signals in the order stored in the storage unit 32 from the internal LF transmission unit 33a and the external LF transmission unit 33b. The transceiver unit 23 of the wireless device 2 sequentially receives the radio signals transmitted from the internal LF transmission unit 33a and the external LF transmission unit 33b. The CPU 20 of the wireless device 2 performs an authentication process based on the third identification information included in the received wireless signal and the second identification information stored in the storage unit 22. When the CPU 20 determines that the identification information matches, the CPU 20 determines the radio signals transmitted by the internal LF transmitter 33a and the external LF transmitter 33b according to the order of reception, and detects the signal strength of each radio signal. . The CPU 20 compares the signal strengths of the respective radio signals. Since the internal LF antenna 34a is closer to the radio 2 than the external LF antenna 34b, it is determined that the radio signal transmitted by the internal LF transmitter 33a is stronger than the radio signal transmitted by the external LF transmitter 33b due to distance attenuation. . In this case, the radio device 2 is identified as being outside the building 8, and transmission of a response signal is prohibited.

  14 and 15 are flowcharts showing a procedure of door unlocking processing according to the third embodiment. Since the processes other than S1 to S15 are the same as those of the door locking system according to the first embodiment, the description thereof is omitted for the sake of brevity. The CPU 30 of the wireless transmission device 3 determines whether or not the opening / closing detection unit 36 detects an opening / closing operation of a door or window (step S50). CPU30 waits until the opening / closing operation | movement of a door or a window is detected, when the opening / closing detection part 36 does not detect the opening / closing operation of a door or a window (S50: NO). CPU30 produces | generates a some radio | wireless signal, when the opening / closing detection part 36 detects opening / closing operation of a door or a window (S50: YES) (step S51). CPU30 adds the 3rd discernment information to a plurality of radio signals (Step S52). The CPU 30 sequentially transmits a radio signal added with the third identification information from the internal LF transmitter 33a and the external LF transmitter 33b to the radio device 2 (step S53). In this embodiment, the CPU 30 transmits a radio signal by the internal LF transmitter 33a after transmitting the radio signal by the external LF transmitter 33b. Good. After completing the process of S53, the CPU 30 returns to S50 and continues the process.

  The CPU 20 of the wireless device 2 receives the plurality of wireless signals to which the third identification information is added at the LF receiving unit 23a (Step S54). The CPU 20 performs an authentication process based on the third identification information included in the received plurality of radio signals and the second identification information stored in the storage unit 22 (step S55).

  The CPU 20 determines whether or not the authentication is successful, that is, whether or not the third identification information included in the plurality of wireless signals matches the second identification information stored in the storage unit 22 (step S56). When the third identification information does not match the second identification information (S56: NO), the CPU 20 ends the process. When the CPU 20 matches the third identification information and the second identification information (S56: YES), the CPU 20 is transmitted from either the internal transmission unit 33a or the external LF transmission unit 33b in the order received by the LF reception unit 23a. Determine if it is a radio signal. Specifically, the order in which the LF receiver 23a receives a plurality of radio signals is input to the CPU 20. The CPU 20 reads the order of receiving a plurality of radio signals stored in the storage unit 22 in advance. Based on the order read from the storage unit 22, the CPU 20 transmits the first wireless signal transmitted from the internal LF transmitter 33a and the second transmitted from the external LF transmitter 33b. It is determined that the signal is a wireless signal (step S57).

  The detection unit 26 detects the signal strength of each wireless signal, and outputs the detected signal strength of each wireless signal to the CPU 20 (step S58). The CPU 20 identifies the position by comparing the signal strengths of the radio signals transmitted from the internal LF transmitter 33a or the external LF transmitter 33b (step S59). Specifically, when the CPU 20 determines that the signal strength of the radio signal transmitted from the internal LF transmitter 33a is stronger than the signal strength of the radio signal transmitted from the external LF transmitter 33b, the radio 2 is placed inside the building. Judge that there is. When the CPU 20 determines that the signal strength of the radio signal transmitted from the external LF transmitter 33b is stronger than the signal strength of the radio signal transmitted from the internal LF transmitter 33a, the radio device 2 determines that the radio device 2 is outside the building. .

  The CPU 20 determines whether or not the wireless device 2 has been determined to be inside the building (step S60). When the CPU 20 determines that the wireless device 2 is inside the building (S60: YES), the CPU 20 is in a transmission prohibited state (step S61). When the CPU 20 determines that the wireless device 2 is outside the building (S60: NO), the CPU 20 enters a transmission permission state (step S62). Thereafter, the same processing as in the first embodiment is performed.

  In this way, the wireless transmission device 3 sequentially transmits wireless signals from the internal LF transmission unit 33a and the external LF transmission unit 33b of the building 8. When the CPU 20 of the wireless device 2 is inside the building by comparing the signal strengths of the respective wireless signals, the CPU 20 is in a transmission-inhibited state, and when the wireless device 2 is outside the building, the CPU 20 is in a transmission-permitted state. Become. Therefore, when the radio device 2 possessed by the user enters the building, the CPU 20 is in a transmission-inhibited state, so that vehicle theft due to a relay attack can be prevented.

(Embodiment 4)
In the third embodiment, the wireless transmission device 3 is configured to transmit a wireless signal when an opening / closing operation of a door or window is detected. The wireless transmission device 3 according to the fourth embodiment may transmit a wireless signal at predetermined time intervals. The wireless transmission device 3 may transmit a wireless signal every predetermined time interval, and may transmit a wireless signal each time an opening / closing operation of a door or window is detected.

  FIG. 16 is a flowchart illustrating a procedure of door unlocking processing performed by the wireless transmission device 3 according to the fourth embodiment. In the following, the configuration and operation other than those specifically explained and the operation are the same as those of the third embodiment, and the description is omitted for the sake of brevity.

  The CPU 30 of the wireless transmission device 3 measures time by the time measuring unit 35 and determines whether or not a predetermined time interval has been reached (step S70). The predetermined time interval is stored in the storage unit 32, and may be several seconds to several tens of seconds, for example.

  When the CPU 30 determines that the predetermined time interval has been reached (S70: YES), the CPU 30 generates a plurality of radio signals (step S71). The CPU 30 adds the third identification information to the plurality of radio signals (step S72). Radio signals with the third identification information added are sequentially transmitted from the internal LF transmitter 33a and the external LF transmitter 33b (step S73). After the process of S73 is completed, the CPU 30 returns the process to S70 and continues the process until a predetermined time interval elapses. When it is determined that the predetermined time interval has not been reached (S70: NO), the CPU 30 returns the process to S70 and continues the process until the predetermined time interval elapses.

  Therefore, even when the wireless device 2 fails to receive a plurality of wireless signals, the wireless device 2 can receive a plurality of wireless signals after a predetermined time has elapsed.

  In addition, it should be considered that the embodiment disclosed this time is illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Door Locking Control Device 2 Radio (Radio Communication Device)
3 Wireless Transmitter 7 Vehicle 8 Building 20 CPU (Control Unit)
22 storage unit 22a identification information file 23 transmission / reception unit 23a LF reception unit (reception unit)
23b UHF transmitter (transmitter)
25 Operation part 26 Detection part 30 CPU
32a Identification information file 33a Internal LF transmitter (internal transmitter)
33b External LF transmitter (external transmitter)
36 Open / Close Detection Unit 100 Door Locking System

Claims (8)

A portable wireless communication device having a transmission / reception unit for receiving a call signal and transmitting a response signal to the call signal;
A door locking system comprising: a door locking control device that controls the key of a vehicle door by transmitting the calling signal to the wireless communication device and receiving the response signal transmitted from the wireless communication device;
A wireless transmission device that transmits a wireless signal to the wireless communication device,
An open / close detection unit for detecting an opening / closing operation of a building door;
A generation unit for generating a prohibition signal for prohibiting transmission of the response signal and a permission signal for permitting transmission in the transmission / reception unit;
An identification information adding unit for adding identification information for identifying itself to the prohibition signal and the permission signal;
A transmission unit that alternately transmits the prohibition signal and the permission signal to which the identification information is added when the opening / closing detection unit detects an opening / closing operation of the door of the building;
The wireless communication device is
A receiving unit for receiving the prohibition signal and the permission signal;
A storage unit for storing the identification information;
When the reception unit receives the prohibition signal or the permission signal, it determines whether the identification information added to the prohibition signal or the permission signal matches the identification information stored in the storage unit A determination unit;
A control unit that prohibits or permits the transmission / reception unit to transmit the response signal based on the prohibition signal or the permission signal when the determination unit determines that they match. Locking system.   2. The door locking system according to claim 1, wherein the transmission unit further transmits the prohibition signal or the permission signal at a predetermined time interval. A portable wireless communication device having a transmission / reception unit for receiving a call signal and transmitting a response signal to the call signal;
A door locking system comprising: a door locking control device that controls the key of a vehicle door by transmitting the calling signal to the wireless communication device and receiving the response signal transmitted from the wireless communication device;
A wireless transmission device that transmits a wireless signal to the wireless communication device,
A generator for generating a plurality of radio signals;
An identification information adding unit for adding identification information for identifying itself to the plurality of radio signals;
An internal transmitter that is installed inside the building and transmits a radio signal with the identification information added thereto;
An external transmitter that is installed outside the building and transmits the radio signal;
A transmission control unit that controls the internal transmission unit and the external transmission unit to sequentially transmit a plurality of radio signals with the identification information added thereto;
The wireless communication device is
A receiver that receives the plurality of radio signals sequentially transmitted from the radio transmitter;
A storage unit for storing the identification information;
A detection unit for detecting signal strengths of the plurality of radio signals received by the reception unit;
An identification information determination unit that determines whether or not the identification information added to the plurality of radio signals matches the identification information stored in the storage unit;
When the identification information determination unit determines that they match, the wireless signal transmitted by the internal transmission unit and the external transmission unit is determined according to the order of the plurality of wireless signals, and the wireless signal detected by the detection unit If the signal strength of the radio signal transmitted by the internal transmitter is strong, the transmission of the response signal is prohibited, and the signal strength of the radio signal transmitted by the external transmitter is And a control unit that permits transmission of the response signal when it is strong. The wireless transmission device
It has an open / close detection unit that detects opening and closing operations of building doors.
The door according to claim 3, wherein the transmission control unit is configured to sequentially transmit the plurality of wireless signals when the opening / closing detection unit detects an opening / closing operation of the door of the building. Locking system.   5. The door locking system according to claim 3, wherein the transmission control unit is configured to sequentially transmit a plurality of wireless signals at a predetermined time interval. The wireless communication device is
An operation unit for receiving an operation related to unlocking the door of the vehicle;
The door according to any one of claims 1 to 5, further comprising: a transmission permission unit that permits the transmission / reception unit to transmit the response signal when the operation unit receives an operation. Locking system. An open / close detection unit for detecting an opening / closing operation of a building door;
A generation unit for generating a prohibition signal for prohibiting transmission of a radio signal and a permission signal for permitting transmission of the radio signal;
An identification information adding unit for adding identification information for identifying itself to the prohibition signal and the permission signal;
A wireless transmission device comprising: a transmission unit that alternately transmits the prohibition signal and the permission signal to which the identification information is added when the opening / closing detection unit detects an opening / closing operation of the door of the building. In a portable wireless communication device having a transmission / reception unit that receives a call signal and transmits a response signal to the call signal,
A receiver for receiving a plurality of radio signals transmitted inside and outside the building;
A storage unit for storing identification information for identifying itself;
A detection unit for detecting signal strengths of the plurality of radio signals received by the reception unit;
An identification information determination unit that determines whether or not the identification information added to the plurality of radio signals matches the identification information stored in the storage unit;
If it is determined by the identification information determination unit that they match,
The wireless signals transmitted inside and outside the building are determined according to the order of the plurality of wireless signals, the signal strength of the wireless signals detected by the detection unit is compared, and the wireless signals transmitted inside the building are transmitted. A control unit that prohibits transmission of the response signal when the signal strength of the radio signal is strong, and permits transmission of the response signal when the signal strength of the radio signal transmitted outside the building is strong. A wireless communication device comprising:

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