WO2019058996A1 - Communication system for vehicle, vehicle-mounted device, vehicle control method and computer program - Google Patents

Communication system for vehicle, vehicle-mounted device, vehicle control method and computer program Download PDF

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Publication number
WO2019058996A1
WO2019058996A1 PCT/JP2018/033174 JP2018033174W WO2019058996A1 WO 2019058996 A1 WO2019058996 A1 WO 2019058996A1 JP 2018033174 W JP2018033174 W JP 2018033174W WO 2019058996 A1 WO2019058996 A1 WO 2019058996A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
antenna
portable device
received
received signal
Prior art date
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PCT/JP2018/033174
Other languages
French (fr)
Japanese (ja)
Inventor
亮太 吉田
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2019058996A1 publication Critical patent/WO2019058996A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Definitions

  • the present invention relates to a communication system for a vehicle, an in-vehicle apparatus, a vehicle control method, and a computer program.
  • This application claims the priority based on Japanese Patent Application No. 2017-181795 filed on Sep. 21, 2017, and incorporates all the contents described in the aforementioned Japanese application.
  • the driver's seat side received signal strength Hd when the electronic key receives a radio wave from the driver's seat antenna, and the passenger's seat side reception signal when the electronic key receives a radio wave from the passenger seat antenna In an XY orthogonal coordinate system in which the strength Hp is taken as the X-axis and the Y-axis, respectively, a determination line L which is constructed from a plurality of linear equations and which becomes a reference when determining the electronic key position is determined. Then, the communication terminal position determination that determines the position of the electronic key based on which position the coordinate point P determined from the driver's seat side received signal strength Hd and the passenger seat side received signal strength Hp is relative to the determination line L An apparatus is disclosed.
  • a vehicular communication system includes an on-vehicle device that transmits signals into and out of a vehicle compartment via a plurality of antennas, and a portable device that transmits received signal strengths of signals transmitted from the respective antennas.
  • the on-vehicle apparatus includes: a storage unit storing a threshold table of an intensity threshold according to the received signal intensity that can be received from the portable apparatus; an antenna received from the portable apparatus; The inside / outside determination unit which determines whether the portable device is inside or outside the vehicle based on the received signal strength relating to the antenna and the intensity threshold, and based on the determination result of the inside / outside determination unit And an output control unit that outputs a signal for unlocking the vehicle door.
  • An on-vehicle apparatus is an on-vehicle apparatus that transmits signals into and out of a vehicle compartment via a plurality of antennas and receives received signal strengths of signals transmitted from the respective antennas from a portable device.
  • a storage unit storing a threshold table of an intensity threshold according to received signal strengths that can be received from the portable device; received signal strengths for one antenna and another antenna received from the portable device; and the intensity threshold
  • an output control unit for outputting a signal for unlocking the vehicle door based on the determination result of the inside / outside determination unit that determines whether the portable device is inside or outside the vehicle based on the determination result
  • an on-vehicle device transmits a signal to the inside or outside of a vehicle compartment via a plurality of antennas, and receives an received signal strength of a signal transmitted from each antenna from a portable device.
  • a vehicle control method for controlling, based on a threshold table of an intensity threshold according to received signal strength that can be received from the portable device, and received signal strength for one antenna and another antenna received from the portable device A step of outputting a signal for unlocking the vehicle door based on the determination result of the inside / outside determination step of determining whether the portable device is in the vehicle compartment or outside the vehicle compartment; Including.
  • a computer program receives from a portable device received signal strengths for signals transmitted from a plurality of antennas, and a threshold table of strength thresholds according to received signal strengths that can be received from the portable device; Whether the portable device is inside or outside the vehicle is determined based on the received signal strength of one antenna and the other antenna received from the portable device, and based on the result of the determination, The computer is caused to execute a process of outputting a signal for unlocking the vehicle door.
  • the present invention can not only be realized as a vehicular communication system provided with such a characteristic processing unit, but can be realized as a method having such characteristic processing as a step, or such a step is executed on a computer. It can be realized as a computer program for Further, the present invention can be realized as a semiconductor integrated circuit that realizes part or all of a vehicular communication system, or can be realized as another system including a vehicular communication system.
  • FIG. 1 is a schematic view showing one configuration example of a vehicular communication system according to a first embodiment.
  • FIG. 1 is a block diagram showing an exemplary configuration of a portable device according to Embodiment 1.
  • FIG. 1 is a block diagram showing an exemplary configuration of an on-vehicle apparatus according to a first embodiment.
  • FIG. 6 is a conceptual diagram showing a threshold value table stored in a storage unit according to the first embodiment.
  • FIG. 2 is a functional block diagram showing a main part configuration of a control unit according to the first embodiment. It is a flowchart which shows one processing example when the communication system for vehicles which concerns on Embodiment 1 performs vehicle control. It is a schematic diagram which shows one structural example of the communication system for vehicles which concerns on Embodiment 2.
  • FIG. 7 is a block diagram showing an example of a configuration of an on-vehicle apparatus according to a second embodiment.
  • FIG. 7 is a functional block diagram showing a main configuration of a control unit according to a second embodiment. It is a flowchart which shows one processing example when the communication system for vehicles which concerns on Embodiment 2 performs vehicle control.
  • the location of the portable device can be determined with high accuracy while being simple, and vehicle control can be performed more accurately.
  • a vehicular communication system includes an on-vehicle device that transmits signals into and out of a vehicle compartment via a plurality of antennas, and a portable device that transmits received signal strengths of signals transmitted from the respective antennas.
  • a vehicle communication system including: a storage unit storing a threshold table of an intensity threshold according to received signal strength that can be received from the portable device; and the onboard device received from the portable device The determination result of the inside / outside determination unit which determines whether the portable device is inside or outside the vehicle based on the received signal strength of the antenna and the other antenna and the strength threshold value, and the inside / outside determination unit And an output control unit that outputs a signal for unlocking the vehicle door.
  • the inside / outside determination unit of the in-vehicle device may include received signal strengths of one antenna and another antenna received from the portable device, and the strength threshold. Based on the determination of the location of whether the portable device is inside or outside the vehicle, for example, when it is determined that the portable device is outside the vehicle, the output control unit releases the vehicle door. Output a lock signal. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • the vehicular communication system is characterized in that the plurality of antennas are three or more, and the storage unit stores the threshold table for each combination of at least two antennas; A determination unit that determines the one antenna and the other antenna when a specific signal is received, and a table selection unit that selects one of the threshold tables based on the determination result of the determination unit; Equipped with
  • the determination unit determines the one antenna and the other antenna, and based on the determination result of the determination unit.
  • the table selection unit selects one of the plurality of threshold value tables stored in the storage unit. Therefore, since the one antenna, the other antenna, and the most suitable one as the threshold table can be selected, the accuracy in determining the location of the portable device can be enhanced.
  • the determination unit performs the determination based on a transmission source of the specific signal.
  • the determination unit when the determination unit makes such a determination, the determination is made based on the transmission source of the received specific signal. Therefore, for example, by determining one antenna and another antenna close to the transmission source of the received specific signal, the accuracy in determining the location of the portable device can be further enhanced.
  • the inside / outside determination unit determines that the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna. In this case, it is determined that the portable device is in the vehicle compartment.
  • the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna of the threshold table.
  • the inside / outside determination unit determines that the portable device is in the vehicle compartment. Therefore, since the location of the portable device can be determined only by comparing the intensity threshold of the threshold table with the received signal intensity of the other antenna, the location of the portable device can be determined easily and quickly. I can do it.
  • the value of the received signal strength of the one antenna is an integer.
  • the value of the received signal strength of the one antenna is an integer. That is, the variable in the process of determining the location of the portable device is an int type. Therefore, the processing load can be reduced compared to the case of double type.
  • the on-vehicle apparatus is an on-vehicle apparatus that transmits signals into and out of the vehicle compartment via a plurality of antennas, and receives received signal strength of the signals transmitted from each antenna from the portable device.
  • a signal for unlocking the vehicle door is output based on the determination result of the inside / outside determination unit that determines whether the portable device is in the vehicle interior or the outside based on the threshold value and the inside / outside determination unit.
  • an output control unit is an on-vehicle apparatus that transmits signals into and out of the vehicle compartment via a plurality of antennas, and receives received signal strength of the signals transmitted from each antenna from the portable device.
  • the inside / outside determination unit of the on-vehicle apparatus is based on the received signal strengths for the one antenna and the other antennas received from the portable apparatus, and the strength threshold.
  • the output control unit unlocks the vehicle door when it is determined whether the portable device is inside or outside the vehicle, for example, when it is determined that the portable device is outside the vehicle. Output a signal. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • the plurality of antennas is three or more
  • the storage unit stores the threshold table for each combination of at least two antennas, and a specific signal is received
  • a table selection unit that selects one of the threshold tables based on the determination result of the determination unit.
  • the determination unit determines the one antenna and the other antenna, and based on the determination result of the determination unit,
  • the table selection unit selects one of the plurality of threshold value tables stored in the storage unit. Therefore, since the one antenna, the other antenna, and the most suitable one as the threshold table can be selected, the accuracy in determining the location of the portable device can be enhanced.
  • the determination unit performs the determination based on a transmission source of the specific signal.
  • the determination unit when the determination unit makes the determination, the determination is performed based on the transmission source of the received specific signal. Therefore, for example, by determining one antenna and another antenna close to the transmission source of the received specific signal, the accuracy in determining the location of the portable device can be further enhanced.
  • the inside / outside determination unit determines that the received signal strength of the other antenna is equal to or greater than a strength threshold corresponding to the received signal strength of the one antenna. It is determined that the portable device is in the vehicle compartment.
  • the portable device is used when the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna of the threshold table.
  • the inside / outside determination unit determines that the vehicle is in the vehicle compartment. Therefore, since the location of the portable device can be determined only by comparing the intensity threshold of the threshold table with the received signal intensity of the other antenna, the location of the portable device can be determined easily and quickly. I can do it.
  • the value of the received signal strength of the one antenna is an integer.
  • the value of the received signal strength of the one antenna is an integer. That is, the variable in the process of determining the location of the portable device is an int type. Therefore, the processing load can be reduced compared to the case of double type.
  • a vehicle control method transmits a signal to and from a cabin through a plurality of antennas, and receives from a portable device the received signal strength of the signal transmitted from each antenna.
  • step is a vehicle control method for controlling a vehicle, and the threshold table of the intensity threshold according to the received signal strength that can be received from the portable device, and the received signal strength for one antenna and other antennas received from the portable device.
  • the portable device is selected based on the received signal strengths of the one antenna and the other antenna received from the portable device and the intensity threshold of the threshold table. A determination is made as to whether the vehicle is in the passenger compartment or outside the passenger compartment. For example, when it is determined that the portable device is outside the vehicle, a signal for unlocking the vehicle door is output. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • the computer program receives from the portable device the received signal strength for signals transmitted from a plurality of antennas, and the threshold of the strength threshold according to the received signal strength that can be received from the portable device. Based on the table and the received signal strength for one antenna and another antenna received from the portable device, it is determined whether the portable device is inside or outside the vehicle, and the result of the determination is Based on the control, the computer is caused to execute processing for outputting a signal for unlocking the vehicle door.
  • the portable device is based on the received signal strengths of the antenna and the other antenna received from the portable device and the intensity threshold of the threshold table. A determination is made as to whether the vehicle is in the vehicle interior or outside the vehicle exterior. For example, when it is determined that the portable device is outside the vehicle, a signal for unlocking the vehicle door is output. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • FIG. 1 is a schematic view showing one configuration example of a vehicular communication system 100 according to the first embodiment.
  • the vehicular communication system 100 according to the first embodiment includes an on-vehicle device 1 that transmits and receives various signals using two transmitting antennas 3 and receiving antennas 4 provided on a vehicle C, and a mobile that transmits and receives signals to and from the on-vehicle devices 1. And the machine 2.
  • the two transmit antennas 3 include a first transmit antenna 31 and a second transmit antenna 32.
  • the first transmission antenna 31 is provided on a pillar on the driver's seat side
  • the second transmission antenna 32 is provided on a pillar on the passenger's seat side.
  • the first transmitting antenna 31 and the second transmitting antenna 32 transmit signals to the portable device 2.
  • the first transmission antenna 31 and the second transmission antenna 32 may be abbreviated as transmission antennas 31 and 32.
  • the receiving antenna 4 is provided at the center of the rear seat. For example, they are provided under the seat in the center of the rear seat, at appropriate places such as the backrest.
  • the right side in the traveling direction of the vehicle C is the driver's seat side
  • the left side in the traveling direction is the passenger side.
  • the receiving antenna 4 receives a response signal described later from the portable device 2.
  • a plurality of vehicle door request switches 5 are provided on the outer surface. Specifically, a first vehicle door request switch 51 is provided on the door handle outside the driver's seat, and a second vehicle door request switch 52 is provided on the door handle outside the passenger seat.
  • Each vehicle door request switch 5 is configured of, for example, a push-down switch for locking or unlocking a door provided with the vehicle door request switch, a contact sensor for detecting a user's hand touching the door handle, or the like.
  • Each vehicle door request switch 5 may be separate from the structure for locking the door provided with it and the structure for unlocking.
  • the in-vehicle device 1 wirelessly transmits a signal for determining the position of the portable device 2 via the transmission antennas 31 and 32.
  • the portable device 2 receives the signals transmitted from the transmitting antennas 31 and 32, and measures the received signal strength of the received signals.
  • the portable device 2 wirelessly transmits a response signal including the measured received signal strength to the in-vehicle device 1 in response to the signal transmitted by the in-vehicle device 1.
  • the in-vehicle device 1 receives the response signal transmitted from the portable device 2, determines the position where the portable device 2 is located based on the received signal strength included in the received response signal, and performs predetermined processing according to the determination result Run. For example, the in-vehicle device 1 executes processing such as locking or unlocking of the vehicle door, engine start, warning of missing locking of the vehicle door, and the like.
  • FIG. 2 is a block diagram showing one configuration example of the portable device 2 according to the first embodiment.
  • the portable device 2 is provided with a receiving unit 23, a signal strength measuring unit 23b, a switch 23c, a transmitting unit 22, a storage unit 24, and the like.
  • the portable device 2 further includes a control unit 21.
  • the control unit 21 controls the operation of each component described above.
  • the control unit 21 is a microcomputer having, for example, one or more central processing units (CPU), a multi-core CPU, a read only memory (ROM), a random access memory (RAM), an input / output interface, a timer, and the like.
  • the CPU of the control unit 21 is connected to the transmission unit 22 and the reception unit 23 via an input / output interface.
  • the storage unit 24 is a non-volatile memory such as an EEPROM (Electrically Erasable Programmable ROM) or a flash memory.
  • the storage unit 24 stores a control program for the control unit 21 to determine whether the portable device 2 is outside the vehicle or inside the vehicle.
  • the control unit 21 controls the operation of each component by executing the control program stored in the storage unit 24 and is necessary for determining whether the portable device 2 is outside the vehicle or inside the vehicle.
  • Various processes for transmitting information to the on-vehicle device 1 are executed.
  • the storage unit 24 also stores a portable device identifier for identifying the portable device 2. Although the control unit 21 and the storage unit 24 are illustrated as separate components in FIG. 2, the storage unit 24 may be provided inside the control unit 21.
  • the receiving unit 23 is connected to a three-axis antenna 23a in which three coils are oriented in directions orthogonal to each other via a switch 23c.
  • the receiving unit 23 receives the wireless signal transmitted from the on-vehicle device 1 through the three-axis antenna 23 a and the switch 23 c.
  • the three radio signals received by the three-axis antenna 23a are input to the switch 23c.
  • the switch 23 c selects one radio signal in accordance with the control of the control unit 21.
  • the receiving unit 23 is a circuit that removes the component of the carrier wave from the radio signal selected by the switch 23 c to extract a reception signal, and outputs the extracted reception signal to the control unit 21.
  • a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
  • the portable device 2 also includes a signal strength measurement unit 23b.
  • the 3-axis antenna 23a receives a wireless signal transmitted from the in-vehicle device 1, and the signal strength measurement unit 23b measures the received signal strength of the wireless signal selected by the switch 23c, and controls the measured received signal strength Output to 21
  • the control unit 21 selects each of the three wireless signals from the three-axis antenna 23a in accordance with the timing at which the wireless signal for signal strength measurement is transmitted from the in-vehicle device 1, and receives the received signal strength of the selected wireless signal. It measures by the intensity
  • the control unit 21 combines the components of the measured received signal strength to perform vector calculation, and calculates the received signal strength in the amplitude direction of the wireless signal transmitted from the on-vehicle device 1. Therefore, the control unit 21 can obtain a constant received signal strength regardless of the orientation or the attitude of the portable device 2 with respect to the vehicle C.
  • the one calculated by vector calculation is referred to as received signal strength.
  • the control unit 21 calculates the received signal strength of each signal received through the three-axis antenna 23a is transmitted from the portable device 2 to the in-vehicle device 1,
  • the control unit 11 may calculate the received signal strength. It is sufficient that the on-vehicle device 1 can acquire the reception signal strength when the portable device 2 receives the signal transmitted from the transmission antennas 31 and 32.
  • the transmission unit 22 is a circuit that modulates a response signal or the like input by the control unit 21 using a carrier wave, and wirelessly transmits the signal via the transmission antenna 22a.
  • a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
  • FIG. 3 is a block diagram showing an example of the configuration of the on-vehicle device 1 according to the first embodiment.
  • the in-vehicle apparatus 1 includes an in-vehicle reception unit 12, an in-vehicle transmission unit 13, a storage unit 14, and the like.
  • the in-vehicle device 1 further includes a control unit 11, and controls the operation of each component described above.
  • the control unit 11 is a microcomputer having, for example, one or more CPUs, a multi-core CPU, a ROM, a RAM, an input / output interface, a timer, and the like.
  • the control unit 11 is connected to the on-vehicle reception unit 12, the on-vehicle transmission unit 13, and the storage unit 14 via an input / output interface.
  • the control unit 11 controls the operation of each component by executing a control program 10a described later stored in the storage unit 14, and determines whether the portable device 2 is outside the vehicle or inside the vehicle, The predetermined process according to the said determination is performed.
  • the storage unit 14 is a non-volatile memory similar to the storage unit 24.
  • the storage unit 14 stores a control program 10 a for executing determination of the location of the portable device 2 by the control unit 11 controlling the operation of each component of the in-vehicle device 1.
  • the storage unit 14 stores a threshold value table in which the intensity value of each of the received signal intensities that can be received from the portable device 2 is associated with a predetermined intensity threshold. Details of the threshold value table will be described later.
  • the control unit 11 and the storage unit 14 are illustrated as separate components in FIG. 3, the storage unit 14 may be provided inside the control unit 11. Further, the threshold value table may be stored in the storage unit 14 by being described in the control program 10a.
  • the control program 10a according to the first embodiment may be recorded on the recording medium 10 in a computer readable manner.
  • the storage unit 14 stores the control program 10 a read from the recording medium 10 by a reading device (not shown).
  • the recording medium 10 is an optical disc such as a CD (Compact Disc) -ROM, a DVD (Digital Versatile Disc) -ROM, a BD (Blu-ray (registered trademark) Disc), a flexible disc, a magnetic disc such as a hard disc, a magnetic optical disc, a semiconductor memory Etc.
  • the control program 10a according to the first embodiment may be downloaded from an external computer (not shown) connected to a communication network (not shown) and stored in the storage unit 14.
  • control program 10a compares the received signal strengths of the transmitting antenna 31 and the transmitting antenna 32 received from the portable device 2 with the intensity value and the intensity threshold to determine whether the portable device 2 is in the vehicle compartment
  • a computer program may be included that makes it possible to determine whether the vehicle is out of the room and to output at least a signal for unlocking the vehicle door based on the result of the determination.
  • a receiving antenna 4 is connected to the in-vehicle receiving unit 12.
  • the on-vehicle receiving unit 12 receives a response signal and the like transmitted by wireless from the portable device 2 through the receiving antenna 4.
  • the on-vehicle receiving unit 12 is a circuit that removes the component of the carrier wave from the received response signal or the like to extract the received signal, and outputs the extracted received signal to the control unit 11.
  • a carrier wave an Ultra High Frequency band (UHF band) of 300 MHz to 3 GHz is used, but it is not limited to this frequency band.
  • the on-vehicle transmission unit 13 is a circuit that modulates a signal output from the control unit 11 into a radio signal using a carrier wave, and transmits the radio signal from the transmission antennas 31 and 32 to the portable device 2.
  • a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
  • the in-vehicle device 1 further includes a switch 13a.
  • the radio signal modulated as described above is transmitted from the one transmission antenna 3 selected by the switch 13 a to the portable device 2 according to the control of the control unit 11.
  • the in-vehicle device 1 configured as described above sequentially transmits such signals from the first transmitting antenna 31 and the second transmitting antenna 32 so that the portable device 2 can identify the transmitting antenna 3 to which the signal has been transmitted.
  • a request signal according to the operation state of the vehicle door request switch 5 is input to the control unit 11 of the in-vehicle device 1.
  • the control unit 11 can recognize the operation state of the vehicle door request switch 5 based on the input request signal. Further, the control unit 11 may directly acquire a request signal corresponding to the operation of the vehicle door request switch 5, or may acquire it via a door ECU (Electronic Control Unit), another ECU or the like.
  • a door ECU Electronic Control Unit
  • FIG. 4 is a conceptual diagram showing the threshold value table stored in the storage unit 14 according to the first embodiment.
  • the strength value and the strength threshold associated with the strength value in the threshold table are obtained based on a determination formula that serves as a reference in determining whether the portable device 2 is inside or outside the vehicle.
  • the determination equation is a binary value using a two-dimensional vector consisting of two received signal strengths when the portable device 2 receives the signals transmitted from the first transmitting antenna 31 and the second transmitting antenna 32, respectively. Obtained by the classifier.
  • the classifier is, for example, a support vector machine (nonlinear SVM (Support Vector Machine)) that performs non-linear identification, various neural network models, and the like.
  • the received signal strength of one antenna is mapped by mapping the determination formula with the received signal strength of one of the transmitting antennas 31 and 32 and the received signal strength of the other as the X axis and the Y axis, respectively. And the received signal strength of the other antenna are associated in a one-to-one manner.
  • the intensity associated with each of the received signal intensities that the in-vehicle device 1 can receive from the portable device 2 The value can be any integer in the range of integers from 0 to 511.
  • the received signal strength of one antenna is in the integer range of 0 to 511, it is possible to specify the received signal strength of the other antenna as a reference for the vehicle interior and the vehicle exterior.
  • the threshold value table received signal strengths (intensity threshold) for the other antenna specified according to each intensity value related to the reception signal strength for one antenna from 0 to 511 and each intensity value Is associated with.
  • one intensity value and an intensity threshold value associated therewith become the boundary between the interior of the vehicle and the exterior of the vehicle when determining the location of the portable device 2.
  • FIG. 5 is a functional block diagram showing the main configuration of the control unit 11 according to the first embodiment.
  • the control unit 11 includes a CPU 111, an inside / outside determination unit 112, an output control unit 113, and the like.
  • the CPU 111 controls the above-described components by loading a control program stored in advance in the ROM or the storage unit 14 onto the RAM and executing the control program.
  • the inside / outside determination unit 112 compares the received signal strengths of the transmitting antennas 31 and 32 received from the portable device 2 with the intensity value and the intensity threshold of the threshold table to determine whether the portable device 2 is in the vehicle compartment Determine if it is outside the room.
  • the inside / outside determination unit 112 compares the received signal strengths of the transmission antennas 31 and 32 received from the portable device 2 with the strength value and the strength threshold of the threshold table, respectively.
  • the reception signal strengths of the transmission antennas 31 and 32 received from the portable device 2 will also be referred to as the measurement reception signal strength of the first transmission antenna 31 and the measurement reception signal strength of the second transmission antenna 32, respectively.
  • the inside / outside determination unit 112 reads, from the threshold value table, an intensity threshold value corresponding to an intensity value corresponding to the measurement reception signal intensity of the first transmission antenna 31 (one antenna). The inside / outside determination unit 112 compares the read intensity threshold with the measured reception signal strength of the second transmission antenna 32 (another antenna). When the strength threshold is greater than the measured reception signal strength of the second transmission antenna 32, the inside / outside determination unit 112 determines that the portable device 2 is outside the vehicle, and the strength threshold is smaller than the measurement reception signal strength of the second transmission antenna 32. In this case, it is determined that the portable device 2 is in the vehicle compartment.
  • the in-vehicle device 1 is not limited to this.
  • the inside / outside determination unit 112 uses the value corresponding to the measured reception signal strength of the second transmission antenna 32 as the strength value, reads the corresponding strength threshold from the threshold table, and compares it with the measurement reception signal strength of the first transmission antenna 31. It is good. In this case, it is necessary to replace the intensity value in the threshold table with the threshold intensity.
  • the storage unit 14 may store in advance another threshold value table in which the intensity value and the threshold value intensity in the threshold value table are replaced.
  • Output control unit 113 outputs a vehicle door control signal for controlling unlocking or locking of the vehicle door to a door ECU not shown according to the operation of vehicle door request switch 5 and the determination result of inside / outside determination unit 112. Do.
  • the door ECU locks or unlocks the vehicle door in accordance with the vehicle door control signal from the output control unit 113.
  • FIG. 6 is a flowchart illustrating an example of processing when the vehicular communication system 100 according to the first embodiment performs vehicle control.
  • the inside / outside determination unit 112 reads the intensity threshold corresponding to the intensity value corresponding to the measured reception signal strength of the first transmission antenna 31 from the threshold table, and the measurement reception signal of the second transmission antenna 32 The case of comparison with the intensity will be described as an example.
  • the CPU 111 of the control unit 11 determines whether a request signal has been input (step S101).
  • a request signal is, for example, a signal relating to a request for locking or unlocking the vehicle door.
  • step S101: NO the determination is repeated until it is determined that the request signal is input. If the CPU 111 determines that the request signal is input (step S101: YES), the CPU 111 acquires the measurement reception signal strength of the first transmission antenna 31 and the measurement reception signal strength of the second transmission antenna 32 (step S102).
  • the measurement reception signal strength may be received from the portable device 2 in response to the input of the request signal. Alternatively, the measurement reception signal strength may be periodically acquired, the acquired measurement reception signal strength may be stored in the storage unit 14, and the latest one may be used.
  • the inside / outside determination unit 112 reads an intensity threshold value corresponding to the intensity value corresponding to the measured reception signal intensity of the first transmission antenna 31 from the threshold value table of the storage unit 14 (step S103).
  • the inside / outside determination unit 112 compares the read intensity threshold with the measured reception signal intensity of the second transmission antenna 32. That is, the inside / outside determination unit 112 determines whether the measured reception signal strength of the second transmission antenna 32 is equal to or greater than the read strength threshold (step S104).
  • step S104 determines that the measured reception signal strength of the second transmission antenna 32 is not greater than or equal to the read strength threshold (step S104: NO), that is, the strength threshold is higher than the measured reception signal strength of the second transmission antenna 32.
  • the strength threshold is higher than the measured reception signal strength of the second transmission antenna 32.
  • the output control unit 113 outputs a vehicle door control signal for unlocking the vehicle door to a door ECU (not shown).
  • the door ECU unlocks the vehicle door according to the vehicle door control signal from the output control unit 113 (step S106).
  • step S104 determines that the portable device 2 is in the vehicle compartment.
  • step S105 the vehicle door is not unlocked.
  • the location of the portable device 2 is determined based on the threshold value table.
  • the intensity value (and the intensity threshold) in the threshold table is an integer. Therefore, compared with the case where the determination of the location of the portable device 2 is performed using a continuous (double type) determination formula using a non-linear SVM or the like, the processing load on the control unit 11 can be reduced and faster processing is possible. It is. Furthermore, the amount of memory required to determine the location of the portable device 2 can be greatly reduced.
  • FIG. 7 is a schematic view showing one configuration example of the vehicle communication system 100 according to the second embodiment
  • FIG. 8 is a block diagram showing one configuration example of the in-vehicle apparatus 1 according to the second embodiment.
  • the vehicular communication system 100 according to the second embodiment has a configuration substantially similar to that of the first embodiment. However, in the vehicle communication system 100 according to the second embodiment, the three transmission antennas 3 are provided in the vehicle C, and this point is different from the first embodiment.
  • the vehicle C according to the second embodiment is provided with a first transmission antenna 31, a second transmission antenna 32, and a third transmission antenna 33.
  • the first transmitting antenna 31 and the second transmitting antenna 32 have already been described, and the detailed description will be omitted.
  • the third transmission antenna 33 is provided at the center of the vehicle interior of the vehicle C.
  • the third transmission antenna 33 is an appropriate place such as an armrest or a console box provided between the driver's seat and the passenger seat.
  • Provided in The third transmission antenna 33 is not limited to the above-described example as long as it is provided at the center of the vehicle interior.
  • one of the three transmitting antennas 31 to 33 is one transmitting antenna 3 selected by the switch 13 a according to the control of the control unit 11.
  • the wireless signal is transmitted to the portable device 2 via Such radio signals are sequentially transmitted from the first transmission antenna 31, the second transmission antenna 32, and the third transmission antenna 33 so that the portable device 2 can identify the transmission antenna 3 to which the signal has been transmitted.
  • the storage unit 14 stores a plurality of threshold tables.
  • the storage unit 14 stores a threshold value table for each combination of at least two transmission antennas 3. That is, in the second embodiment, since there are three transmitting antennas 31 to 33, at least three threshold tables are stored.
  • the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32.
  • a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32.
  • the intensity value according to the measurement reception signal strength of one of the first transmission antenna 31 and the second transmission antenna 32 (for example, the first transmission antenna 31) and the measurement of the second transmission antenna 32 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength.
  • the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths related to the first transmission antenna 31 and the third transmission antenna 33, respectively.
  • the intensity value according to the measurement reception signal strength of one of the first transmission antenna 31 and the third transmission antenna 33 (for example, the first transmission antenna 31) and the measurement of the third transmission antenna 33 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength. Furthermore, the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the third transmission antenna 33 and the second transmission antenna 32.
  • the intensity value according to the measurement reception signal strength of one of the third transmission antenna 33 and the second transmission antenna 32 (for example, the third transmission antenna 33) and the measurement of the second transmission antenna 32 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength.
  • the storage unit 14 may further store another threshold value table in which the intensity value and the threshold value intensity in the threshold value table are replaced. That is, a threshold table having an intensity value and an intensity threshold relating to the measured reception signal strength of the other one (second transmission antenna 32) of the first transmission antenna 31 and the second transmission antenna 32, the first transmission antenna 31 and A threshold value table having an intensity value and an intensity threshold value related to the measured reception signal strength of the other one (for example, the third transmission antenna 33) of the third transmission antenna 33, the third transmission antenna 33 and the second transmission antenna 32 Among these, the storage unit 14 may further store a threshold value table having an intensity value and an intensity threshold value related to the measured reception signal intensity of the other one (for example, the second transmission antenna 32).
  • FIG. 9 is a functional block diagram showing the main configuration of the control unit 11 according to the second embodiment.
  • the control unit 11 includes a CPU 111, an inside / outside determination unit 112, an output control unit 113, a determination unit 114, a table selection unit 115, and the like.
  • the CPU 111, the inside / outside determination unit 112, and the output control unit 113 have already been described, and the detailed description will be omitted.
  • the determination unit 114 determines two transmission antennas among the first transmission antenna 31, the second transmission antenna 32, and the third transmission antenna 33 when the specific signal is received. Specifically, one transmission antenna according to the strength value in the threshold value table and another transmission antenna according to the threshold strength are determined.
  • the specific signal is, for example, a vehicle door control signal for controlling the unlocking or locking of the vehicle door, an engine start control signal for controlling the start of the engine, or the like.
  • the determination unit 114 performs based on the transmission source of the received specific signal. For example, when the specific signal is a vehicle door control signal, the determination unit 114 determines whether the vehicle door control signal is transmitted from the first vehicle door request switch 51 or the second vehicle door request switch 52. Determine the three transmit antennas 3.
  • the determination unit 114 determines two transmission antennas 3 closest to the transmission source of the received specific signal. For example, when the transmission source of the received vehicle door control signal is the first vehicle door request switch 51, that is, when the user touches the first vehicle door request switch 51 on the driver's side of the vehicle C, the determination unit A step 114 determines the first transmitting antenna 31 and the third transmitting antenna 33 which are closest to the first vehicle door request switch 51.
  • the table selection unit 115 selects one of the plurality of threshold value tables stored in the storage unit 14 based on the determination result of the determination unit 114. That is, the table selection unit 115 selects the threshold value table based on the determination formula using the two-dimensional vector consisting of the measurement reception signal strengths of the two transmission antennas 3 determined by the determination unit 114. For example, when the determination unit 114 determines the first transmission antenna 31 and the second transmission antenna 32, the table selection unit 115 determines the two-dimensional configuration of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32, respectively. A threshold table is selected based on a decision formula using a vector.
  • FIG. 10 is a flowchart illustrating an example of processing when the vehicular communication system 100 according to the second embodiment performs vehicle control.
  • the determination unit 114 determines the first transmission antenna 31 and the third transmission antenna 33. I will list and explain.
  • the CPU 111 of the control unit 11 determines whether a request signal is input (step S201).
  • a request signal is, for example, a signal relating to a request for locking or unlocking the vehicle door.
  • step S201: NO the determination is repeated until it is determined that the request signal is input.
  • the CPU 111 determines that the request signal is input (step S201: YES). At this time, the determination unit 114 determines the first transmission antenna 31 and the third transmission antenna 33 closest to the first vehicle door request switch 51 (step S202).
  • the table selection unit 115 selects the threshold value table based on the determination formula using the two-dimensional vector consisting of the measurement reception signal strengths of the first transmission antenna 31 and the third transmission antenna 33 determined by the determination unit 114. (Step S203).
  • steps S204 to S208 are the same as the processes of steps S102 to S106 of FIG. 6, and thus the detailed description will be omitted.
  • the location of the portable device 2 based on the measured reception signal strengths of the two transmission antennas 3 closest to the transmission source of the received specific signal. make a judgment on Therefore, since the determination of the location of the portable device 2 is performed using the received signal strength of the transmitting antenna 3 close to the user (portable device 2), the accuracy in the determination can be enhanced.

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  • General Physics & Mathematics (AREA)
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  • Remote Sensing (AREA)
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Abstract

According to the present invention, on the basis of reception signal intensities for one antenna and another antenna provided on a vehicle, the reception signal intensities received from a portable device, and the intensity threshold values of a threshold table having intensity threshold values according to the reception signal intensities which can be received from the portable device, a determination is made as to whether the portable device is in the vehicle compartment or outside the vehicle compartment. For example, when it is determined that the portable device is outside the vehicle compartment, a signal for unlocking a vehicle door is output.

Description

車両用通信システム、車載機、車両制御方法及びコンピュータプログラムCommunication system for vehicle, in-vehicle device, vehicle control method and computer program
　本発明は、車両用通信システム、車載機、車両制御方法及びコンピュータプログラムに関する。
　本出願は、２０１７年９月２１日出願の日本出願第２０１７－１８１７９５号に基づく優先権を主張し、前記日本出願に記載された全ての記載内容を援用するものである。 The present invention relates to a communication system for a vehicle, an in-vehicle apparatus, a vehicle control method, and a computer program.
This application claims the priority based on Japanese Patent Application No. 2017-181795 filed on Sep. 21, 2017, and incorporates all the contents described in the aforementioned Japanese application.
　例えば、特許文献１においては、運転席アンテナからの電波を電子キーが受信した際の運転席側受信信号強度Ｈｄと、助手席アンテナからの電波を電子キーが受信した際の助手席側受信信号強度Ｈｐとを、それぞれＸ軸とＹ軸としたＸ－Ｙ直交座標系において、複数の直線式から構築した、電子キー位置を判定する際の基準となる判定ラインＬを定める。そして、運転席側受信信号強度Ｈｄと助手席側受信信号強度Ｈｐとから決まる座標点Ｐが判定ラインＬに対してどの位置であるかに基づいて、電子キーの位置を判定する通信端末位置判定装置が開示されている。 For example, in Patent Document 1, the driver's seat side received signal strength Hd when the electronic key receives a radio wave from the driver's seat antenna, and the passenger's seat side reception signal when the electronic key receives a radio wave from the passenger seat antenna In an XY orthogonal coordinate system in which the strength Hp is taken as the X-axis and the Y-axis, respectively, a determination line L which is constructed from a plurality of linear equations and which becomes a reference when determining the electronic key position is determined. Then, the communication terminal position determination that determines the position of the electronic key based on which position the coordinate point P determined from the driver's seat side received signal strength Hd and the passenger seat side received signal strength Hp is relative to the determination line L An apparatus is disclosed.
特許第５４３７９５９号公報Patent No. 54377959
　本発明の一態様に係る車両用通信システムは、複数のアンテナを介して車室の内外に信号を送信する車載機と、各アンテナから送信された信号の受信信号強度を送信する携帯機とを備える車両用通信システムであって、前記車載機は、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルを記憶する記憶部と、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定部と、前記内外判定部の判定結果に基づいて、車両ドアを解錠する信号を出力する出力制御部とを備える。 A vehicular communication system according to an aspect of the present invention includes an on-vehicle device that transmits signals into and out of a vehicle compartment via a plurality of antennas, and a portable device that transmits received signal strengths of signals transmitted from the respective antennas. The on-vehicle apparatus includes: a storage unit storing a threshold table of an intensity threshold according to the received signal intensity that can be received from the portable apparatus; an antenna received from the portable apparatus; The inside / outside determination unit which determines whether the portable device is inside or outside the vehicle based on the received signal strength relating to the antenna and the intensity threshold, and based on the determination result of the inside / outside determination unit And an output control unit that outputs a signal for unlocking the vehicle door.
　本発明の一態様に係る車載機は、複数のアンテナを介して車室の内外に信号を送信し、各アンテナから送信された信号の受信信号強度を携帯機から受信する車載機であって、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルを記憶する記憶部と、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定部と、前記内外判定部の判定結果に基づいて、車両ドアを解錠する信号を出力する出力制御部とを備える。 An on-vehicle apparatus according to an aspect of the present invention is an on-vehicle apparatus that transmits signals into and out of a vehicle compartment via a plurality of antennas and receives received signal strengths of signals transmitted from the respective antennas from a portable device. A storage unit storing a threshold table of an intensity threshold according to received signal strengths that can be received from the portable device; received signal strengths for one antenna and another antenna received from the portable device; and the intensity threshold And an output control unit for outputting a signal for unlocking the vehicle door based on the determination result of the inside / outside determination unit that determines whether the portable device is inside or outside the vehicle based on the determination result And
　本発明の一態様に係る車両制御方法は、複数のアンテナを介して車室の内外に信号を送信し、各アンテナから送信された信号の受信信号強度を携帯機から受信する車載機が車両を制御する車両制御方法であって、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルと、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定ステップと、前記内外判定ステップでの判定結果に基づいて、車両ドアを解錠する信号を出力するステップとを含む。 In the vehicle control method according to an aspect of the present invention, an on-vehicle device transmits a signal to the inside or outside of a vehicle compartment via a plurality of antennas, and receives an received signal strength of a signal transmitted from each antenna from a portable device. A vehicle control method for controlling, based on a threshold table of an intensity threshold according to received signal strength that can be received from the portable device, and received signal strength for one antenna and another antenna received from the portable device A step of outputting a signal for unlocking the vehicle door based on the determination result of the inside / outside determination step of determining whether the portable device is in the vehicle compartment or outside the vehicle compartment; Including.
　本発明の一態様に係るコンピュータプログラムは、複数のアンテナから送信された信号に対する受信信号強度を携帯機から受信し、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルと、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行い、前記判定の結果に基づいて、車両ドアを解錠する信号を出力する処理をコンピュータに実行させる。 A computer program according to an aspect of the present invention receives from a portable device received signal strengths for signals transmitted from a plurality of antennas, and a threshold table of strength thresholds according to received signal strengths that can be received from the portable device; Whether the portable device is inside or outside the vehicle is determined based on the received signal strength of one antenna and the other antenna received from the portable device, and based on the result of the determination, The computer is caused to execute a process of outputting a signal for unlocking the vehicle door.
　なお、本発明を、このような特徴的な処理部を備える車両用通信システムとして実現することができるだけでなく、かかる特徴的な処理をステップとする方法として実現したり、かかるステップをコンピュータに実行させるためのコンピュータプログラムとして実現したりすることができる。また、本発明を、車両用通信システムの一部又は全部を実現する半導体集積回路として実現したり、車両用通信システムを含む他のシステムとして実現したりすることができる。 The present invention can not only be realized as a vehicular communication system provided with such a characteristic processing unit, but can be realized as a method having such characteristic processing as a step, or such a step is executed on a computer. It can be realized as a computer program for Further, the present invention can be realized as a semiconductor integrated circuit that realizes part or all of a vehicular communication system, or can be realized as another system including a vehicular communication system.
実施形態１に係る車両用通信システムの一構成例を示す模式図である。FIG. 1 is a schematic view showing one configuration example of a vehicular communication system according to a first embodiment. 実施形態１に係る携帯機の一構成例を示すブロック図である。FIG. 1 is a block diagram showing an exemplary configuration of a portable device according to Embodiment 1. 実施形態１に係る車載機の一構成例を示すブロック図である。FIG. 1 is a block diagram showing an exemplary configuration of an on-vehicle apparatus according to a first embodiment. 実施形態１に係る記憶部に記憶された閾値テーブルを示す概念図である。FIG. 6 is a conceptual diagram showing a threshold value table stored in a storage unit according to the first embodiment. 実施形態１に係る制御部の要部構成を示す機能ブロック図である。FIG. 2 is a functional block diagram showing a main part configuration of a control unit according to the first embodiment. 実施形態１に係る車両用通信システムが車両制御を行う場合の一処理例を示すフローチャートである。It is a flowchart which shows one processing example when the communication system for vehicles which concerns on Embodiment 1 performs vehicle control. 実施形態２に係る車両用通信システムの一構成例を示す模式図である。It is a schematic diagram which shows one structural example of the communication system for vehicles which concerns on Embodiment 2. FIG. 実施形態２に係る車載機の一構成例を示すブロック図である。FIG. 7 is a block diagram showing an example of a configuration of an on-vehicle apparatus according to a second embodiment. 実施形態２に係る制御部の要部構成を示す機能ブロック図である。FIG. 7 is a functional block diagram showing a main configuration of a control unit according to a second embodiment. 実施形態２に係る車両用通信システムが車両制御を行う場合の一処理例を示すフローチャートである。It is a flowchart which shows one processing example when the communication system for vehicles which concerns on Embodiment 2 performs vehicle control.
［本開示が解決しようとする課題］
　一方、携帯機の所在位置の判断には、サポートベクターマシン（非線形ＳＶＭ(Support Vector Machine)）等により導出された判定式が用いられる。しかし、このような判定式は計算負荷が非常に高いという問題がある。 [Problems to be solved by the present disclosure]
On the other hand, a determination formula derived by a support vector machine (non-linear SVM (Support Vector Machine)) or the like is used to determine the location of the portable device. However, such a judgment formula has a problem that the calculation load is very high.
　そこで、非線形ＳＶＭにより導出された判定式を近似式に置き換える方法が提案されている。しかし、このような方法では、近似誤差による判定精度の悪化という問題がある。
　これに対して、特許文献１に係る通信端末位置判定装置では、最初から１次式を用いるものであり、このような問題を解決することは出来ない。 Therefore, a method has been proposed in which the determination formula derived by the non-linear SVM is replaced with an approximation formula. However, such a method has a problem that the determination accuracy is deteriorated due to the approximation error.
On the other hand, the communication terminal position determination apparatus according to Patent Document 1 uses a linear expression from the beginning, and such a problem can not be solved.
　そこで、より簡単でありながら、精度の高く、携帯機の所在位置を判断できる車両用通信システム、車載機、車両制御方法及びコンピュータプログラムを提供することを目的とする。 Therefore, it is an object of the present invention to provide a vehicular communication system, an in-vehicle device, a vehicle control method, and a computer program that can determine the location of a portable device with high accuracy while being simpler.
［本開示の効果］
　上記の態様によれば、簡単でありながら、精度高く、携帯機の所在位置を判断でき、より的確に車両の制御を行うことができる。 [Effect of the present disclosure]
According to the above aspect, the location of the portable device can be determined with high accuracy while being simple, and vehicle control can be performed more accurately.
［本発明の実施形態の説明］
　最初に本発明の実施態様を列挙して説明する。以下に記載する実施形態の少なくとも一部を任意に組み合わせてもよい。 Description of the embodiment of the present invention
First, the embodiments of the present invention will be listed and described. At least a part of the embodiments described below may be arbitrarily combined.
（１）本発明の一態様に係る車両用通信システムは、複数のアンテナを介して車室の内外に信号を送信する車載機と、各アンテナから送信された信号の受信信号強度を送信する携帯機とを備える車両用通信システムであって、前記車載機は、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルを記憶する記憶部と、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定部と、前記内外判定部の判定結果に基づいて、車両ドアを解錠する信号を出力する出力制御部とを備える。 (1) A vehicular communication system according to an aspect of the present invention includes an on-vehicle device that transmits signals into and out of a vehicle compartment via a plurality of antennas, and a portable device that transmits received signal strengths of signals transmitted from the respective antennas. A vehicle communication system including: a storage unit storing a threshold table of an intensity threshold according to received signal strength that can be received from the portable device; and the onboard device received from the portable device The determination result of the inside / outside determination unit which determines whether the portable device is inside or outside the vehicle based on the received signal strength of the antenna and the other antenna and the strength threshold value, and the inside / outside determination unit And an output control unit that outputs a signal for unlocking the vehicle door.
　上記の一態様に係る車両用通信システムにあっては、前記車載機の前記内外判定部が、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの所在位置の判定を行い、例えば、前記携帯機が車室外にあると判定された場合、前記出力制御部が車両ドアを解錠する信号を出力する。
　従って、複雑な判定式を用いる場合に比べ、簡単かつ迅速に前記携帯機の所在位置の判断を行うことができ、近似式を用いる場合に比べ、正確に前記携帯機の所在位置の判断を行うことができる。 In the communication system for a vehicle according to the above aspect, the inside / outside determination unit of the in-vehicle device may include received signal strengths of one antenna and another antenna received from the portable device, and the strength threshold. Based on the determination of the location of whether the portable device is inside or outside the vehicle, for example, when it is determined that the portable device is outside the vehicle, the output control unit releases the vehicle door. Output a lock signal.
Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
（２）本発明の一態様に係る車両用通信システムは、前記複数のアンテナは３つ以上であり、前記記憶部は少なくとも２つのアンテナの組み合わせ毎に前記閾値テーブルを記憶しており、前記車載機は、特定信号が受信された場合、前記一のアンテナ及び前記他のアンテナの決定を行う決定部と、前記決定部の決定結果に基づいて、何れかの閾値テーブルを選択するテーブル選択部とを備える。 (2) The vehicular communication system according to an aspect of the present invention is characterized in that the plurality of antennas are three or more, and the storage unit stores the threshold table for each combination of at least two antennas; A determination unit that determines the one antenna and the other antenna when a specific signal is received, and a table selection unit that selects one of the threshold tables based on the determination result of the determination unit; Equipped with
　上記の一態様に係る車両用通信システムにあっては、前記決定部は、特定信号が受信された場合、前記一のアンテナ及び前記他のアンテナの決定を行い、前記決定部の決定結果に基づいて、前記記憶部が記憶している複数の閾値テーブルの中から前記テーブル選択部が何れかの閾値テーブルを選択する。
　従って、前記一のアンテナ及び前記他のアンテナ、並びに前記閾値テーブルとして最も適したものを選択できるので、前記携帯機の所在位置の判断における正確性を高めることが出来る。 In the communication system for a vehicle according to the above aspect, when the specific signal is received, the determination unit determines the one antenna and the other antenna, and based on the determination result of the determination unit. The table selection unit selects one of the plurality of threshold value tables stored in the storage unit.
Therefore, since the one antenna, the other antenna, and the most suitable one as the threshold table can be selected, the accuracy in determining the location of the portable device can be enhanced.
（３）本発明の一態様に係る車両用通信システムは、前記決定部は、前記特定信号の送信元に基づいて、前記決定を行う。 (3) In the communication system for a vehicle according to an aspect of the present invention, the determination unit performs the determination based on a transmission source of the specific signal.
　上記の一態様に係る車両用通信システムにあっては、前記決定部が斯かる決定を行う際、受信された特定信号の送信元に基づいて前記決定を行う。
　従って、例えば、受信された特定信号の送信元に近い一のアンテナ及び他のアンテナを決定することにより、前記携帯機の所在位置の判断における正確性を更に高めることが出来る。 In the vehicular communication system according to the above aspect, when the determination unit makes such a determination, the determination is made based on the transmission source of the received specific signal.
Therefore, for example, by determining one antenna and another antenna close to the transmission source of the received specific signal, the accuracy in determining the location of the portable device can be further enhanced.
（４）本発明の一態様に係る車両用通信システムは、前記内外判定部は、前記他のアンテナに係る受信信号強度が、前記一のアンテナに係る受信信号強度に対応する強度閾値以上である場合、前記携帯機が車室内にあると判定する。 (4) In the vehicular communication system according to one aspect of the present invention, the inside / outside determination unit determines that the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna. In this case, it is determined that the portable device is in the vehicle compartment.
　上記の一態様に係る車両用通信システムにあっては、前記他のアンテナに係る受信信号強度が、前記閾値テーブルの前記一のアンテナに係る受信信号強度に対応する強度閾値以上である場合、前記携帯機が車室内にあると前記内外判定部が判定する。
　従って、前記閾値テーブルの強度閾値と、前記他のアンテナに係る受信信号強度との比較のみによって前記携帯機の所在位置の判断ができるので、簡単かつ迅速に前記携帯機の所在位置の判断を行うことが出来る。 In the vehicular communication system according to the above aspect, the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna of the threshold table. The inside / outside determination unit determines that the portable device is in the vehicle compartment.
Therefore, since the location of the portable device can be determined only by comparing the intensity threshold of the threshold table with the received signal intensity of the other antenna, the location of the portable device can be determined easily and quickly. I can do it.
（５）本発明の一態様に係る車両用通信システムは、前記一のアンテナに係る受信信号強度の値は整数である。 (5) In the communication system for a vehicle according to one aspect of the present invention, the value of the received signal strength of the one antenna is an integer.
　上記の一態様に係る車両用通信システムにあっては、前記一のアンテナに係る受信信号強度の値は整数である。すなわち、前記携帯機の所在位置を判断する処理における変数がｉｎｔ型である。従って、ｄｏｕｂｌｅ型である場合に比べて、処理負担を軽減することが出来る。 In the vehicular communication system according to the above aspect, the value of the received signal strength of the one antenna is an integer. That is, the variable in the process of determining the location of the portable device is an int type. Therefore, the processing load can be reduced compared to the case of double type.
（６）本発明の一態様に係る車載機は、複数のアンテナを介して車室の内外に信号を送信し、各アンテナから送信された信号の受信信号強度を携帯機から受信する車載機であって、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルを記憶する記憶部と、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定部と、前記内外判定部の判定結果に基づいて、車両ドアを解錠する信号を出力する出力制御部とを備える。 (6) The on-vehicle apparatus according to an aspect of the present invention is an on-vehicle apparatus that transmits signals into and out of the vehicle compartment via a plurality of antennas, and receives received signal strength of the signals transmitted from each antenna from the portable device. A storage unit for storing a threshold table of an intensity threshold according to the received signal strength that can be received from the portable device; received signal strengths for one antenna and another antenna received from the portable device; A signal for unlocking the vehicle door is output based on the determination result of the inside / outside determination unit that determines whether the portable device is in the vehicle interior or the outside based on the threshold value and the inside / outside determination unit. And an output control unit.
　上記の一態様に係る車載機にあっては、前記車載機の前記内外判定部が、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの所在位置の判定を行い、例えば、前記携帯機が車室外にあると判定された場合、前記出力制御部が車両ドアを解錠する信号を出力する。
　従って、複雑な判定式を用いる場合に比べ、簡単かつ迅速に前記携帯機の所在位置の判断を行うことができ、近似式を用いる場合に比べ、正確に前記携帯機の所在位置の判断を行うことができる。 In the on-vehicle apparatus according to the above aspect, the inside / outside determination unit of the on-vehicle apparatus is based on the received signal strengths for the one antenna and the other antennas received from the portable apparatus, and the strength threshold. The output control unit unlocks the vehicle door when it is determined whether the portable device is inside or outside the vehicle, for example, when it is determined that the portable device is outside the vehicle. Output a signal.
Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
（７）本発明の一態様に係る車載機は、前記複数のアンテナは３つ以上であり、前記記憶部は少なくとも２つのアンテナの組み合わせ毎に前記閾値テーブルを記憶しており、特定信号が受信された場合、前記一のアンテナ及び前記他のアンテナの決定を行う決定部と、前記決定部の決定結果に基づいて、何れかの閾値テーブルを選択するテーブル選択部とを備える。 (7) In the on-vehicle apparatus according to an aspect of the present invention, the plurality of antennas is three or more, the storage unit stores the threshold table for each combination of at least two antennas, and a specific signal is received And a table selection unit that selects one of the threshold tables based on the determination result of the determination unit.
　上記の一態様に係る車載機にあっては、前記決定部は、特定信号が受信された場合、前記一のアンテナ及び前記他のアンテナの決定を行い、前記決定部の決定結果に基づいて、前記記憶部が記憶している複数の閾値テーブルの中から前記テーブル選択部が何れかの閾値テーブルを選択する。
　従って、前記一のアンテナ及び前記他のアンテナ、並びに前記閾値テーブルとして最も適したものを選択できるので、前記携帯機の所在位置の判断における正確性を高めることが出来る。 In the on-vehicle apparatus according to the above aspect, when the specific signal is received, the determination unit determines the one antenna and the other antenna, and based on the determination result of the determination unit, The table selection unit selects one of the plurality of threshold value tables stored in the storage unit.
Therefore, since the one antenna, the other antenna, and the most suitable one as the threshold table can be selected, the accuracy in determining the location of the portable device can be enhanced.
（８）本発明の一態様に係る車載機は、前記決定部は、前記特定信号の送信元に基づいて、前記決定を行う。 (8) In the in-vehicle apparatus according to one aspect of the present invention, the determination unit performs the determination based on a transmission source of the specific signal.
　上記の一態様に係る車載機にあっては、前記決定部が斯かる決定を行う際、受信された特定信号の送信元に基づいて前記決定を行う。
　従って、例えば、受信された特定信号の送信元に近い一のアンテナ及び他のアンテナを決定することにより、前記携帯機の所在位置の判断における正確性を更に高めることが出来る。 In the on-vehicle apparatus according to the above aspect, when the determination unit makes the determination, the determination is performed based on the transmission source of the received specific signal.
Therefore, for example, by determining one antenna and another antenna close to the transmission source of the received specific signal, the accuracy in determining the location of the portable device can be further enhanced.
（９）本発明の一態様に係る車載機は、前記内外判定部は、前記他のアンテナに係る受信信号強度が、前記一のアンテナに係る受信信号強度に対応する強度閾値以上である場合、前記携帯機が車室内にあると判定する。 (9) In the on-vehicle apparatus according to one aspect of the present invention, the inside / outside determination unit determines that the received signal strength of the other antenna is equal to or greater than a strength threshold corresponding to the received signal strength of the one antenna. It is determined that the portable device is in the vehicle compartment.
　上記の一態様に係る車載機にあっては、前記他のアンテナに係る受信信号強度が、前記閾値テーブルの前記一のアンテナに係る受信信号強度に対応する強度閾値以上である場合、前記携帯機が車室内にあると前記内外判定部が判定する。
　従って、前記閾値テーブルの強度閾値と、前記他のアンテナに係る受信信号強度との比較のみによって前記携帯機の所在位置の判断ができるので、簡単かつ迅速に前記携帯機の所在位置の判断を行うことが出来る。 In the on-vehicle device according to the above aspect, the portable device is used when the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna of the threshold table. The inside / outside determination unit determines that the vehicle is in the vehicle compartment.
Therefore, since the location of the portable device can be determined only by comparing the intensity threshold of the threshold table with the received signal intensity of the other antenna, the location of the portable device can be determined easily and quickly. I can do it.
（１０）本発明の一態様に係る車載機は、前記一のアンテナに係る受信信号強度の値は整数である。 (10) In the on-vehicle apparatus according to one aspect of the present invention, the value of the received signal strength of the one antenna is an integer.
　上記の一態様に係る車載機にあっては、前記一のアンテナに係る受信信号強度の値は整数である。すなわち、前記携帯機の所在位置を判断する処理における変数がｉｎｔ型である。従って、ｄｏｕｂｌｅ型である場合に比べて、処理負担を軽減することが出来る。 In the on-vehicle apparatus according to the one aspect, the value of the received signal strength of the one antenna is an integer. That is, the variable in the process of determining the location of the portable device is an int type. Therefore, the processing load can be reduced compared to the case of double type.
（１１）本発明の一態様に係る車両制御方法は、複数のアンテナを介して車室の内外に信号を送信し、各アンテナから送信された信号の受信信号強度を携帯機から受信する車載機が車両を制御する車両制御方法であって、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルと、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定ステップと、前記内外判定ステップでの判定結果に基づいて、車両ドアを解錠する信号を出力するステップとを含む。 (11) A vehicle control method according to an aspect of the present invention transmits a signal to and from a cabin through a plurality of antennas, and receives from a portable device the received signal strength of the signal transmitted from each antenna. Is a vehicle control method for controlling a vehicle, and the threshold table of the intensity threshold according to the received signal strength that can be received from the portable device, and the received signal strength for one antenna and other antennas received from the portable device Outputting a signal for unlocking the vehicle door on the basis of the determination result in the inside / outside determination step of determining whether the portable device is inside or outside the vehicle, and based on the determination result in the inside / outside determination step. And step.
　上記の一態様に係る車両制御方法にあっては、前記携帯機から受信された一のアンテナ及び他のアンテナに係る受信信号強度と、前記閾値テーブルの前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの所在位置の判定が行われる。例えば、前記携帯機が車室外にあると判定された場合、前記車両ドアを解錠する信号が出力される。
　従って、複雑な判定式を用いる場合に比べ、簡単かつ迅速に前記携帯機の所在位置の判断を行うことができ、近似式を用いる場合に比べ、正確に前記携帯機の所在位置の判断を行うことができる。 In the vehicle control method according to the above aspect, the portable device is selected based on the received signal strengths of the one antenna and the other antenna received from the portable device and the intensity threshold of the threshold table. A determination is made as to whether the vehicle is in the passenger compartment or outside the passenger compartment. For example, when it is determined that the portable device is outside the vehicle, a signal for unlocking the vehicle door is output.
Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
（１２）本発明の一態様に係るコンピュータプログラムは、複数のアンテナから送信された信号に対する受信信号強度を携帯機から受信し、前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルと、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行い、前記判定の結果に基づいて、車両ドアを解錠する信号を出力する処理をコンピュータに実行させる。 (12) The computer program according to an aspect of the present invention receives from the portable device the received signal strength for signals transmitted from a plurality of antennas, and the threshold of the strength threshold according to the received signal strength that can be received from the portable device. Based on the table and the received signal strength for one antenna and another antenna received from the portable device, it is determined whether the portable device is inside or outside the vehicle, and the result of the determination is Based on the control, the computer is caused to execute processing for outputting a signal for unlocking the vehicle door.
　上記の一態様に係るコンピュータプログラムにあっては、前記携帯機から受信された一のアンテナ及び他のアンテナに係る受信信号強度と、前記閾値テーブルの前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの所在位置の判定が行われる。例えば、前記携帯機が車室外にあると判定された場合、前記車両ドアを解錠する信号が出力される。
　従って、複雑な判定式を用いる場合に比べ、簡単かつ迅速に前記携帯機の所在位置の判断を行うことができ、近似式を用いる場合に比べ、正確に前記携帯機の所在位置の判断を行うことができる。 In the computer program according to the above aspect, the portable device is based on the received signal strengths of the antenna and the other antenna received from the portable device and the intensity threshold of the threshold table. A determination is made as to whether the vehicle is in the vehicle interior or outside the vehicle exterior. For example, when it is determined that the portable device is outside the vehicle, a signal for unlocking the vehicle door is output.
Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
［本発明の実施形態の詳細］
　本発明の実施形態に係る車両用通信システム、車載機、車両制御方法及びコンピュータプログラムの具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 Details of the Embodiment of the Present Invention
A communication system for vehicles, an in-vehicle machine, a vehicle control method, and a computer program concerning an embodiment of the present invention are explained below, referring to drawings. The present invention is not limited to these exemplifications, is shown by the claims, and is intended to include all modifications within the scope and meaning equivalent to the claims.
（実施形態１）
　図１は、実施形態１に係る車両用通信システム１００の一構成例を示す模式図である。本実施形態１に係る車両用通信システム１００は、車両Ｃに設けられた２つの送信アンテナ３及び受信アンテナ４を用いて各種信号を送受信する車載機１と、車載機１と信号を送受信する携帯機２とを備える。 (Embodiment 1)
FIG. 1 is a schematic view showing one configuration example of a vehicular communication system 100 according to the first embodiment. The vehicular communication system 100 according to the first embodiment includes an on-vehicle device 1 that transmits and receives various signals using two transmitting antennas 3 and receiving antennas 4 provided on a vehicle C, and a mobile that transmits and receives signals to and from the on-vehicle devices 1. And the machine 2.
　２つの送信アンテナ３は、第１送信アンテナ３１及び第２送信アンテナ３２を含む。第１送信アンテナ３１は、運転席側のピラーに設けられ、第２送信アンテナ３２は助手席側のピラーに設けられている。第１送信アンテナ３１及び第２送信アンテナ３２は携帯機２に信号を送信する。以下では、第１送信アンテナ３１及び第２送信アンテナ３２を略して送信アンテナ３１，３２とも言う。 The two transmit antennas 3 include a first transmit antenna 31 and a second transmit antenna 32. The first transmission antenna 31 is provided on a pillar on the driver's seat side, and the second transmission antenna 32 is provided on a pillar on the passenger's seat side. The first transmitting antenna 31 and the second transmitting antenna 32 transmit signals to the portable device 2. Hereinafter, the first transmission antenna 31 and the second transmission antenna 32 may be abbreviated as transmission antennas 31 and 32.
　受信アンテナ４は、後部座席の中央部に設けられている。例えば、後部座席中央の座席下、背もたれ等の適宜箇所に設けられている。なお、本実施形態１においては車両Ｃの進行方向右側が運転席側、進行方向左側が助手席側である。受信アンテナ４は携帯機２から後述する応答信号を受信する。 The receiving antenna 4 is provided at the center of the rear seat. For example, they are provided under the seat in the center of the rear seat, at appropriate places such as the backrest. In the first embodiment, the right side in the traveling direction of the vehicle C is the driver's seat side, and the left side in the traveling direction is the passenger side. The receiving antenna 4 receives a response signal described later from the portable device 2.
　また、車両Ｃには、複数の車両ドアリクエストスイッチ５が外面に設けられている。具体的には、運転席外側のドアハンドルに第１車両ドアリクエストスイッチ５１及び助手席外側のドアハンドルに第２車両ドアリクエストスイッチ５２が設けられている。各車両ドアリクエストスイッチ５は、例えば、それが設けられたドアを施錠又は解錠するための押下式のスイッチ、ドアハンドルに対するユーザの手の接触を検出する接触センサ等により構成されている。なお、各車両ドアリクエストスイッチ５は、それが設けられたドアを施錠するための構成と、解錠するための構成とが別体であってもよい。 Further, in the vehicle C, a plurality of vehicle door request switches 5 are provided on the outer surface. Specifically, a first vehicle door request switch 51 is provided on the door handle outside the driver's seat, and a second vehicle door request switch 52 is provided on the door handle outside the passenger seat. Each vehicle door request switch 5 is configured of, for example, a push-down switch for locking or unlocking a door provided with the vehicle door request switch, a contact sensor for detecting a user's hand touching the door handle, or the like. Each vehicle door request switch 5 may be separate from the structure for locking the door provided with it and the structure for unlocking.
　車載機１は、携帯機２の位置を判定するための信号を、送信アンテナ３１，３２を介して、無線で送信する。携帯機２は、送信アンテナ３１，３２から送信された信号を受信し、受信した信号の受信信号強度を測定する。車載機１が送信した信号に対して、携帯機２は、測定した受信信号強度を含む応答信号を、無線にて車載機１に送信する。車載機１は携帯機２から送信された応答信号を受信し、受信した応答信号に含まれる受信信号強度に基づいて、携帯機２が所在する位置の判定を行い、判定結果に応じた所定処理を実行する。例えば、車載機１は、車両ドアの施錠又は解錠、エンジン始動、車両ドアの施錠忘れの警告等の処理を実行する。 The in-vehicle device 1 wirelessly transmits a signal for determining the position of the portable device 2 via the transmission antennas 31 and 32. The portable device 2 receives the signals transmitted from the transmitting antennas 31 and 32, and measures the received signal strength of the received signals. The portable device 2 wirelessly transmits a response signal including the measured received signal strength to the in-vehicle device 1 in response to the signal transmitted by the in-vehicle device 1. The in-vehicle device 1 receives the response signal transmitted from the portable device 2, determines the position where the portable device 2 is located based on the received signal strength included in the received response signal, and performs predetermined processing according to the determination result Run. For example, the in-vehicle device 1 executes processing such as locking or unlocking of the vehicle door, engine start, warning of missing locking of the vehicle door, and the like.
　図２は、実施形態１に係る携帯機２の一構成例を示すブロック図である。携帯機２には、受信部２３、信号強度測定部２３ｂ、切替器２３ｃ、送信部２２及び記憶部２４等が設けられている。携帯機２は制御部２１を更に備えており、制御部２１は上述した各構成部の動作を制御する。 FIG. 2 is a block diagram showing one configuration example of the portable device 2 according to the first embodiment. The portable device 2 is provided with a receiving unit 23, a signal strength measuring unit 23b, a switch 23c, a transmitting unit 22, a storage unit 24, and the like. The portable device 2 further includes a control unit 21. The control unit 21 controls the operation of each component described above.
　制御部２１は、例えば一又は複数のＣＰＵ（Central Processing Unit）、マルチコアＣＰＵ、ＲＯＭ（Read Only Memory）、ＲＡＭ（Random Access Memory）、入出力インタフェース、タイマ等を有するマイコンである。制御部２１のＣＰＵは入出力インタフェースを介して送信部２２及び受信部２３に接続されている。 The control unit 21 is a microcomputer having, for example, one or more central processing units (CPU), a multi-core CPU, a read only memory (ROM), a random access memory (RAM), an input / output interface, a timer, and the like. The CPU of the control unit 21 is connected to the transmission unit 22 and the reception unit 23 via an input / output interface.
　記憶部２４は、ＥＥＰＲＯＭ（Electrically Erasable Programmable ROM）、フラッシュメモリ等の不揮発性メモリである。記憶部２４は、携帯機２が車室外にあるか又は車室内にあるかの判定を制御部２１が行うための制御プログラムを記憶している。
　制御部２１は記憶部２４に記憶されている前記制御プログラムを実行することにより、各構成部の動作を制御し、携帯機２が車室外にあるか又は車室内にあるかの判定に必要な情報を車載機１へ送信する各種処理を実行する。
　また、記憶部２４は、携帯機２を識別するための携帯機識別子を記憶している。図２では制御部２１及び記憶部２４を別体の構成部として図示しているが、制御部２１の内部に記憶部２４を備えても良い。 The storage unit 24 is a non-volatile memory such as an EEPROM (Electrically Erasable Programmable ROM) or a flash memory. The storage unit 24 stores a control program for the control unit 21 to determine whether the portable device 2 is outside the vehicle or inside the vehicle.
The control unit 21 controls the operation of each component by executing the control program stored in the storage unit 24 and is necessary for determining whether the portable device 2 is outside the vehicle or inside the vehicle. Various processes for transmitting information to the on-vehicle device 1 are executed.
The storage unit 24 also stores a portable device identifier for identifying the portable device 2. Although the control unit 21 and the storage unit 24 are illustrated as separate components in FIG. 2, the storage unit 24 may be provided inside the control unit 21.
　受信部２３には、３つのコイルを互いに直交する方向に向けて配置した３軸アンテナ２３ａが切替器２３ｃを介して接続されている。受信部２３は、車載機１から送信される無線信号を、３軸アンテナ２３ａ及び切替器２３ｃを通じて受信する。３軸アンテナ２３ａにて受信した３つの無線信号は切替器２３ｃに入力する。切替器２３ｃは、制御部２１の制御に従って、一つの無線信号を選択する。受信部２３は、切替器２３ｃによって選択された無線信号から搬送波の成分を除去して受信信号を抽出し、抽出された受信信号を制御部２１に出力する回路である。搬送波としては３０ｋＨｚ～３００ＭＨｚのLow Frequency帯（LF帯）を使用するが、この周波数帯に限定するものでは無い。 The receiving unit 23 is connected to a three-axis antenna 23a in which three coils are oriented in directions orthogonal to each other via a switch 23c. The receiving unit 23 receives the wireless signal transmitted from the on-vehicle device 1 through the three-axis antenna 23 a and the switch 23 c. The three radio signals received by the three-axis antenna 23a are input to the switch 23c. The switch 23 c selects one radio signal in accordance with the control of the control unit 21. The receiving unit 23 is a circuit that removes the component of the carrier wave from the radio signal selected by the switch 23 c to extract a reception signal, and outputs the extracted reception signal to the control unit 21. Although a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
　また携帯機２は信号強度測定部２３ｂを備える。車載機１から送信される無線信号を３軸アンテナ２３ａが受信し、信号強度測定部２３ｂは、切替器２３ｃにより選択した無線信号の受信信号強度を測定し、測定された受信信号強度を制御部２１に出力する。 The portable device 2 also includes a signal strength measurement unit 23b. The 3-axis antenna 23a receives a wireless signal transmitted from the in-vehicle device 1, and the signal strength measurement unit 23b measures the received signal strength of the wireless signal selected by the switch 23c, and controls the measured received signal strength Output to 21
　制御部２１は車載機１から信号強度測定用の無線信号が送信されるタイミングに合わせて、３軸アンテナ２３ａからの３つの無線信号をそれぞれ選択し、選択された無線信号の受信信号強度を信号強度測定部２３ｂによって測定する。つまり、制御部２１は、３軸アンテナ２３ａの直交する３つの方向における当該受信信号強度の成分を測定する。制御部２１は、測定された受信信号強度の成分を合成してベクトル計算を行い、車載機１から送信される無線信号の振幅方向における受信信号強度を算出する。従って、制御部２１は、車両Ｃに対する携帯機２の向き又は姿勢に拘わらず一定の受信信号強度を得ることが可能となる。以下では、特に断らない限り、ベクトル計算によって算出されたものを、受信信号強度と呼ぶ。 The control unit 21 selects each of the three wireless signals from the three-axis antenna 23a in accordance with the timing at which the wireless signal for signal strength measurement is transmitted from the in-vehicle device 1, and receives the received signal strength of the selected wireless signal. It measures by the intensity | strength measurement part 23b. That is, the control unit 21 measures the component of the received signal strength in three orthogonal directions of the three-axis antenna 23a. The control unit 21 combines the components of the measured received signal strength to perform vector calculation, and calculates the received signal strength in the amplitude direction of the wireless signal transmitted from the on-vehicle device 1. Therefore, the control unit 21 can obtain a constant received signal strength regardless of the orientation or the attitude of the portable device 2 with respect to the vehicle C. Hereinafter, unless otherwise specified, the one calculated by vector calculation is referred to as received signal strength.
　なお、ここでは制御部２１が受信信号強度を算出する例を説明したが、３軸アンテナ２３ａを通じて受信した各信号の受信信号強度を携帯機２から車載機１に送信し、後述する車載機１の制御部１１が受信信号強度の算出を行っても良い。送信アンテナ３１，３２から送信された信号を携帯機２が受信したときの受信信号強度を車載機１が取得することができれば良い。 Here, although an example in which the control unit 21 calculates the received signal strength has been described, the received signal strength of each signal received through the three-axis antenna 23a is transmitted from the portable device 2 to the in-vehicle device 1, The control unit 11 may calculate the received signal strength. It is sufficient that the on-vehicle device 1 can acquire the reception signal strength when the portable device 2 receives the signal transmitted from the transmission antennas 31 and 32.
　送信部２２は、制御部２１により入力された応答信号等を、搬送波を用いて変調し、送信アンテナ２２ａを通じて無線で送信する回路である。搬送波としては３０ｋＨｚ～３００ＭＨｚのLow Frequency帯（LF帯）を使用するが、この周波数帯に限定するものでは無い。 The transmission unit 22 is a circuit that modulates a response signal or the like input by the control unit 21 using a carrier wave, and wirelessly transmits the signal via the transmission antenna 22a. Although a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
　図３は、実施形態１に係る車載機１の一構成例を示すブロック図である。車載機１は、車載受信部１２、車載送信部１３、記憶部１４等を備えている。車載機１は、制御部１１を更に備え、上述した各構成部の動作を制御する。 FIG. 3 is a block diagram showing an example of the configuration of the on-vehicle device 1 according to the first embodiment. The in-vehicle apparatus 1 includes an in-vehicle reception unit 12, an in-vehicle transmission unit 13, a storage unit 14, and the like. The in-vehicle device 1 further includes a control unit 11, and controls the operation of each component described above.
　制御部１１は、例えば一又は複数のＣＰＵ、マルチコアＣＰＵ、ＲＯＭ、ＲＡＭ、入出力インタフェース、タイマ等を有するマイコンである。制御部１１は入出力インタフェースを介して車載受信部１２、車載送信部１３及び記憶部１４に接続している。制御部１１は記憶部１４に記憶されている後述の制御プログラム１０ａを実行することにより、各構成部の動作を制御し、携帯機２が車室外にあるか又は車室内にあるかの判定、当該判定に応じた所定処理を実行する。 The control unit 11 is a microcomputer having, for example, one or more CPUs, a multi-core CPU, a ROM, a RAM, an input / output interface, a timer, and the like. The control unit 11 is connected to the on-vehicle reception unit 12, the on-vehicle transmission unit 13, and the storage unit 14 via an input / output interface. The control unit 11 controls the operation of each component by executing a control program 10a described later stored in the storage unit 14, and determines whether the portable device 2 is outside the vehicle or inside the vehicle, The predetermined process according to the said determination is performed.
　記憶部１４は、記憶部２４と同様の不揮発性メモリである。記憶部１４は、制御部１１が車載機１の各構成部の動作を制御することにより、携帯機２の所在位置の判定を実行するための制御プログラム１０ａを記憶している。また、記憶部１４は、携帯機２から受信し得る受信信号強度の夫々に係る強度値を所定の強度閾値と関連付けた、閾値テーブルを記憶する。閾値テーブルについての詳細は後述する。
　なお、図３では制御部１１及び記憶部１４を別体の構成部として図示しているが、制御部１１の内部に記憶部１４を備えても良い。また、前記閾値テーブルは、制御プログラム１０ａ内に記述されていることにより、記憶部１４に記憶されていても良い。 The storage unit 14 is a non-volatile memory similar to the storage unit 24. The storage unit 14 stores a control program 10 a for executing determination of the location of the portable device 2 by the control unit 11 controlling the operation of each component of the in-vehicle device 1. In addition, the storage unit 14 stores a threshold value table in which the intensity value of each of the received signal intensities that can be received from the portable device 2 is associated with a predetermined intensity threshold. Details of the threshold value table will be described later.
Although the control unit 11 and the storage unit 14 are illustrated as separate components in FIG. 3, the storage unit 14 may be provided inside the control unit 11. Further, the threshold value table may be stored in the storage unit 14 by being described in the control program 10a.
　本実施形態１に係る制御プログラム１０ａは、記録媒体１０にコンピュータ読み取り可能に記録されている態様でも良い。記憶部１４は、図示しない読出装置によって記録媒体１０から読み出された制御プログラム１０ａを記憶する。記録媒体１０はＣＤ（Compact Disc）－ＲＯＭ、ＤＶＤ（Digital Versatile Disc）－ＲＯＭ、ＢＤ（Blu-ray（登録商標） Disc）等の光ディスク、フレキシブルディスク、ハードディスク等の磁気ディスク、磁気光ディスク、半導体メモリ等である。また、図示しない通信網に接続されている図示しない外部コンピュータから本実施形態１に係る制御プログラム１０ａをダウンロードし、記憶部１４に記憶させても良い。 The control program 10a according to the first embodiment may be recorded on the recording medium 10 in a computer readable manner. The storage unit 14 stores the control program 10 a read from the recording medium 10 by a reading device (not shown). The recording medium 10 is an optical disc such as a CD (Compact Disc) -ROM, a DVD (Digital Versatile Disc) -ROM, a BD (Blu-ray (registered trademark) Disc), a flexible disc, a magnetic disc such as a hard disc, a magnetic optical disc, a semiconductor memory Etc. Alternatively, the control program 10a according to the first embodiment may be downloaded from an external computer (not shown) connected to a communication network (not shown) and stored in the storage unit 14.
　例えば、制御プログラム１０ａは、携帯機２から受信した送信アンテナ３１及び送信アンテナ３２に係る受信信号強度と、前記強度値及び前記強度閾値とを対比して、携帯機２が車室内にあるか車室外にあるかの判定を行わせ、斯かる判定の結果に基づいて、少なくとも車両ドアを解錠する信号を出力させるコンピュータプログラムを含んでも良い。 For example, the control program 10a compares the received signal strengths of the transmitting antenna 31 and the transmitting antenna 32 received from the portable device 2 with the intensity value and the intensity threshold to determine whether the portable device 2 is in the vehicle compartment A computer program may be included that makes it possible to determine whether the vehicle is out of the room and to output at least a signal for unlocking the vehicle door based on the result of the determination.
　車載受信部１２には、受信アンテナ４が接続されている。車載受信部１２は、携帯機２から無線により送信される応答信号等を、受信アンテナ４を通じて受信する。車載受信部１２は、受信した応答信号等から搬送波の成分を除去して受信信号を抽出し、抽出された受信信号を制御部１１に出力する回路である。搬送波としては３００ＭＨｚ～３ＧＨｚのUltra High Frequency帯（UHF帯）を使用するが、この周波数帯に限定するものでは無い。 A receiving antenna 4 is connected to the in-vehicle receiving unit 12. The on-vehicle receiving unit 12 receives a response signal and the like transmitted by wireless from the portable device 2 through the receiving antenna 4. The on-vehicle receiving unit 12 is a circuit that removes the component of the carrier wave from the received response signal or the like to extract the received signal, and outputs the extracted received signal to the control unit 11. As a carrier wave, an Ultra High Frequency band (UHF band) of 300 MHz to 3 GHz is used, but it is not limited to this frequency band.
　車載送信部１３は、搬送波を用いて、制御部１１から出力された信号を無線信号に変調し、当該無線信号を送信アンテナ３１，３２から携帯機２へ送信する回路である。搬送波としては３０ｋＨｚ～３００ＭＨｚのLow Frequency帯（LF帯）を使用するが、この周波数帯に限定するものでは無い。 The on-vehicle transmission unit 13 is a circuit that modulates a signal output from the control unit 11 into a radio signal using a carrier wave, and transmits the radio signal from the transmission antennas 31 and 32 to the portable device 2. Although a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
　実施形態１における車載機１は、切替器１３ａを更に備える。上述したように変調された無線信号は、制御部１１の制御に応じて切替器１３ａにて選択された一の送信アンテナ３から携帯機２に送信される。このように構成された車載機１は、信号が送信された送信アンテナ３を携帯機２が識別できるように、斯かる信号を第１送信アンテナ３１及び第２送信アンテナ３２から順次送信する。 The in-vehicle device 1 according to the first embodiment further includes a switch 13a. The radio signal modulated as described above is transmitted from the one transmission antenna 3 selected by the switch 13 a to the portable device 2 according to the control of the control unit 11. The in-vehicle device 1 configured as described above sequentially transmits such signals from the first transmitting antenna 31 and the second transmitting antenna 32 so that the portable device 2 can identify the transmitting antenna 3 to which the signal has been transmitted.
　また、車載機１の制御部１１には、車両ドアリクエストスイッチ５の操作状態に応じたリクエスト信号が入力される。制御部１１は入力されたリクエスト信号に基づいて、車両ドアリクエストスイッチ５の操作状態を認識することができる。また、制御部１１は、車両ドアリクエストスイッチ５の操作に対応したリクエスト信号を直接取得しても良いし、ドアＥＣＵ（Electronic Control Unit）、その他のＥＣＵ等を介して取得しても良い。 Further, a request signal according to the operation state of the vehicle door request switch 5 is input to the control unit 11 of the in-vehicle device 1. The control unit 11 can recognize the operation state of the vehicle door request switch 5 based on the input request signal. Further, the control unit 11 may directly acquire a request signal corresponding to the operation of the vehicle door request switch 5, or may acquire it via a door ECU (Electronic Control Unit), another ECU or the like.
　次に、記憶部１４に記憶された閾値テーブルについて説明する。図４は、実施形態１に係る記憶部１４に記憶された閾値テーブルを示す概念図である。
　閾値テーブルにおける、前記強度値と、該強度値に関連付けられた強度閾値とは、携帯機２が車室内にあるか車室外にあるかの判定において基準となる判定式に基づいて得られる。
　具体的に、前記判定式は、第１送信アンテナ３１及び第２送信アンテナ３２夫々から送信された信号を携帯機２が受信したときの２つの受信信号強度からなる２次元ベクトルを用いる、２値の分類器によって得られる。分類器は、例えば、非線形識別を行うサポートベクターマシン（非線形ＳＶＭ(Support Vector Machine)）、各種のニューラルネットワークモデル等である。 Next, the threshold value table stored in the storage unit 14 will be described. FIG. 4 is a conceptual diagram showing the threshold value table stored in the storage unit 14 according to the first embodiment.
The strength value and the strength threshold associated with the strength value in the threshold table are obtained based on a determination formula that serves as a reference in determining whether the portable device 2 is inside or outside the vehicle.
Specifically, the determination equation is a binary value using a two-dimensional vector consisting of two received signal strengths when the portable device 2 receives the signals transmitted from the first transmitting antenna 31 and the second transmitting antenna 32, respectively. Obtained by the classifier. The classifier is, for example, a support vector machine (nonlinear SVM (Support Vector Machine)) that performs non-linear identification, various neural network models, and the like.
　例えば、送信アンテナ３１，３２のうち、一方に係る受信信号強度と、他方に係る受信信号強度とを夫々Ｘ軸、Ｙ軸として前記判定式をマッピングすることによって、一方のアンテナに係る受信信号強度と、他方のアンテナに係る受信信号強度とが１対１で関連付けられる。
　一方、携帯機２から車載機１に送信される受信信号強度は、０～５１１までの何れかの整数であるので、車載機１が携帯機２から受信し得る受信信号強度の夫々に係る強度値は０～５１１までの整数範囲の何れかの整数になる。してみれば、一方のアンテナに係る受信信号強度を０～５１１までの整数範囲にした場合、車室内及び車室外の基準となる、他方のアンテナに係る受信信号強度を特定することができる。 For example, the received signal strength of one antenna is mapped by mapping the determination formula with the received signal strength of one of the transmitting antennas 31 and 32 and the received signal strength of the other as the X axis and the Y axis, respectively. And the received signal strength of the other antenna are associated in a one-to-one manner.
On the other hand, since the received signal strength transmitted from the portable device 2 to the in-vehicle device 1 is any integer from 0 to 511, the intensity associated with each of the received signal intensities that the in-vehicle device 1 can receive from the portable device 2 The value can be any integer in the range of integers from 0 to 511. As a result, when the received signal strength of one antenna is in the integer range of 0 to 511, it is possible to specify the received signal strength of the other antenna as a reference for the vehicle interior and the vehicle exterior.
　すなわち、閾値テーブルでは、０～５１１までの、一方のアンテナに係る受信信号強度に係る各強度値と、夫々の強度値に応じて特定された、他方のアンテナに係る受信信号強度（強度閾値）とを関連付けている。換言すれば、一の強度値と、これに関連付けられた強度閾値とは、携帯機２の所在位置判断において車室内と車室外との境となる。 That is, in the threshold value table, received signal strengths (intensity threshold) for the other antenna specified according to each intensity value related to the reception signal strength for one antenna from 0 to 511 and each intensity value Is associated with. In other words, one intensity value and an intensity threshold value associated therewith become the boundary between the interior of the vehicle and the exterior of the vehicle when determining the location of the portable device 2.
　図５は、実施形態１に係る制御部１１の要部構成を示す機能ブロック図である。制御部１１はＣＰＵ１１１、内外判定部１１２、出力制御部１１３等を備える。 FIG. 5 is a functional block diagram showing the main configuration of the control unit 11 according to the first embodiment. The control unit 11 includes a CPU 111, an inside / outside determination unit 112, an output control unit 113, and the like.
　ＣＰＵ１１１は、ＲＯＭ又は記憶部１４に予め格納されている制御プログラムをＲＡＭ上にロードして実行することによって、上述した各構成部の制御を行う。 The CPU 111 controls the above-described components by loading a control program stored in advance in the ROM or the storage unit 14 onto the RAM and executing the control program.
　内外判定部１１２は、携帯機２から受信した、送信アンテナ３１，３２に係る受信信号強度と、前記閾値テーブルの強度値及び強度閾値とを対比して、携帯機２が車室内にあるか車室外にあるかの判定を行う。
　内外判定部１１２は、携帯機２から受信した送信アンテナ３１，３２に係る夫々の受信信号強度を、前記閾値テーブルの強度値及び強度閾値と夫々対比する。以下においては、携帯機２から受信した送信アンテナ３１，３２に係る受信信号強度を夫々第１送信アンテナ３１の測定受信信号強度及び第２送信アンテナ３２の測定受信信号強度とも言う。 The inside / outside determination unit 112 compares the received signal strengths of the transmitting antennas 31 and 32 received from the portable device 2 with the intensity value and the intensity threshold of the threshold table to determine whether the portable device 2 is in the vehicle compartment Determine if it is outside the room.
The inside / outside determination unit 112 compares the received signal strengths of the transmission antennas 31 and 32 received from the portable device 2 with the strength value and the strength threshold of the threshold table, respectively. Hereinafter, the reception signal strengths of the transmission antennas 31 and 32 received from the portable device 2 will also be referred to as the measurement reception signal strength of the first transmission antenna 31 and the measurement reception signal strength of the second transmission antenna 32, respectively.
　例えば、内外判定部１１２は、第１送信アンテナ３１（一のアンテナ）の測定受信信号強度に相当する強度値に対応する強度閾値を前記閾値テーブルから読み取る。内外判定部１１２は、読み取った強度閾値を第２送信アンテナ３２（他のアンテナ）の測定受信信号強度と比較する。内外判定部１１２は、強度閾値が第２送信アンテナ３２の測定受信信号強度より大きい場合は携帯機２が車室外にあると判定し、強度閾値が第２送信アンテナ３２の測定受信信号強度より小さい場合は携帯機２が車室内にあると判定する。 For example, the inside / outside determination unit 112 reads, from the threshold value table, an intensity threshold value corresponding to an intensity value corresponding to the measurement reception signal intensity of the first transmission antenna 31 (one antenna). The inside / outside determination unit 112 compares the read intensity threshold with the measured reception signal strength of the second transmission antenna 32 (another antenna). When the strength threshold is greater than the measured reception signal strength of the second transmission antenna 32, the inside / outside determination unit 112 determines that the portable device 2 is outside the vehicle, and the strength threshold is smaller than the measurement reception signal strength of the second transmission antenna 32. In this case, it is determined that the portable device 2 is in the vehicle compartment.
　実施形態１に係る車載機１はこれに限るものでない。内外判定部１１２が、第２送信アンテナ３２の測定受信信号強度に相当する値を強度値としてこれに対応する強度閾値を前記閾値テーブルから読み取り、第１送信アンテナ３１の測定受信信号強度と比較しても良い。この場合においては、前記閾値テーブルにおける強度値を閾値強度と置き換える必要がある。
　または、記憶部１４が、前記閾値テーブルにおける強度値と閾値強度とを置き換えた、他の閾値テーブルを予め記憶しておいても良い。 The in-vehicle device 1 according to the first embodiment is not limited to this. The inside / outside determination unit 112 uses the value corresponding to the measured reception signal strength of the second transmission antenna 32 as the strength value, reads the corresponding strength threshold from the threshold table, and compares it with the measurement reception signal strength of the first transmission antenna 31. It is good. In this case, it is necessary to replace the intensity value in the threshold table with the threshold intensity.
Alternatively, the storage unit 14 may store in advance another threshold value table in which the intensity value and the threshold value intensity in the threshold value table are replaced.
　出力制御部１１３は、車両ドアリクエストスイッチ５の操作と、内外判定部１１２の判定結果に応じて、車両ドアの解錠又は施錠を制御するための車両ドア制御信号を、図示しないドアＥＣＵへ出力する。ドアＥＣＵは、出力制御部１１３からの車両ドア制御信号に従って、車両ドアを施錠し又は解錠する。 Output control unit 113 outputs a vehicle door control signal for controlling unlocking or locking of the vehicle door to a door ECU not shown according to the operation of vehicle door request switch 5 and the determination result of inside / outside determination unit 112. Do. The door ECU locks or unlocks the vehicle door in accordance with the vehicle door control signal from the output control unit 113.
　図６は、実施形態１に係る車両用通信システム１００が車両制御を行う場合の一処理例を示すフローチャートである。以下においては、説明の便宜上、内外判定部１１２が、第１送信アンテナ３１の測定受信信号強度に相当する強度値に対応する強度閾値を前記閾値テーブルから読み取り、第２送信アンテナ３２の測定受信信号強度と比較する場合を例として説明する。 FIG. 6 is a flowchart illustrating an example of processing when the vehicular communication system 100 according to the first embodiment performs vehicle control. In the following, for convenience of explanation, the inside / outside determination unit 112 reads the intensity threshold corresponding to the intensity value corresponding to the measured reception signal strength of the first transmission antenna 31 from the threshold table, and the measurement reception signal of the second transmission antenna 32 The case of comparison with the intensity will be described as an example.
　制御部１１のＣＰＵ１１１はリクエスト信号が入力されたか否かを判定する（ステップＳ１０１）。斯かるリクエスト信号は、例えば車両ドアの施錠又は解錠の要求に係る信号であるとする。 The CPU 111 of the control unit 11 determines whether a request signal has been input (step S101). Such a request signal is, for example, a signal relating to a request for locking or unlocking the vehicle door.
　ＣＰＵ１１１はリクエスト信号が入力されていないと判定した場合（ステップＳ１０１：ＮＯ）、リクエスト信号が入力されたと判定するまで、斯かる判定を繰り返す。
　また、ＣＰＵ１１１は、リクエスト信号が入力されたと判定した場合（ステップＳ１０１：ＹＥＳ）、第１送信アンテナ３１の測定受信信号強度及び第２送信アンテナ３２の測定受信信号強度を取得する（ステップＳ１０２）。
　測定受信信号強度の取得は、リクエスト信号の入力に応じて、携帯機２から受信信号強度を受信しても良い。また、測定受信信号強度の取得を周期的に行って、取得した測定受信信号強度を記憶部１４に記憶しておき、最近のものを用いても良い。 When the CPU 111 determines that the request signal is not input (step S101: NO), the determination is repeated until it is determined that the request signal is input.
If the CPU 111 determines that the request signal is input (step S101: YES), the CPU 111 acquires the measurement reception signal strength of the first transmission antenna 31 and the measurement reception signal strength of the second transmission antenna 32 (step S102).
The measurement reception signal strength may be received from the portable device 2 in response to the input of the request signal. Alternatively, the measurement reception signal strength may be periodically acquired, the acquired measurement reception signal strength may be stored in the storage unit 14, and the latest one may be used.
　次いで、内外判定部１１２は、第１送信アンテナ３１の測定受信信号強度に相当する強度値に対応する強度閾値を記憶部１４の前記閾値テーブルから読み取る（ステップＳ１０３）。 Next, the inside / outside determination unit 112 reads an intensity threshold value corresponding to the intensity value corresponding to the measured reception signal intensity of the first transmission antenna 31 from the threshold value table of the storage unit 14 (step S103).
　また、内外判定部１１２は、読み取った強度閾値を第２送信アンテナ３２の測定受信信号強度と比較する。すなわち、内外判定部１１２は、第２送信アンテナ３２の測定受信信号強度が読み取った強度閾値以上であるか否かを判定する（ステップＳ１０４）。 Further, the inside / outside determination unit 112 compares the read intensity threshold with the measured reception signal intensity of the second transmission antenna 32. That is, the inside / outside determination unit 112 determines whether the measured reception signal strength of the second transmission antenna 32 is equal to or greater than the read strength threshold (step S104).
　内外判定部１１２は、第２送信アンテナ３２の測定受信信号強度が読み取った強度閾値以上でないと判定した場合（ステップＳ１０４：ＮＯ）、すなわち、強度閾値が第２送信アンテナ３２の測定受信信号強度より大きい場合、携帯機２は車室外にあると判定する。 When the inside / outside determination unit 112 determines that the measured reception signal strength of the second transmission antenna 32 is not greater than or equal to the read strength threshold (step S104: NO), that is, the strength threshold is higher than the measured reception signal strength of the second transmission antenna 32. When it is larger, it is determined that the portable device 2 is outside the vehicle.
　この場合、出力制御部１１３は、車両ドアを解錠するための車両ドア制御信号を、図示しないドアＥＣＵへ出力する。ドアＥＣＵは、出力制御部１１３からの車両ドア制御信号に従って、車両ドアを解錠する（ステップＳ１０６）。 In this case, the output control unit 113 outputs a vehicle door control signal for unlocking the vehicle door to a door ECU (not shown). The door ECU unlocks the vehicle door according to the vehicle door control signal from the output control unit 113 (step S106).
　一方、内外判定部１１２は、第２送信アンテナ３２の測定受信信号強度が読み取った強度閾値以上であると判定した場合（ステップＳ１０４：ＹＥＳ）、携帯機２は車室内にあると判定する。 On the other hand, when the inside / outside determination unit 112 determines that the measured reception signal strength of the second transmission antenna 32 is equal to or greater than the read strength threshold (step S104: YES), it determines that the portable device 2 is in the vehicle compartment.
　この場合、ＣＰＵ１１１は、ステップＳ１０１にて入力されたリクエスト信号を無効にする（ステップＳ１０５）。従って、車両ドアは解錠されない。 In this case, the CPU 111 invalidates the request signal input in step S101 (step S105). Thus, the vehicle door is not unlocked.
　以上の記載のように、実施形態１においては、閾値テーブルに基づいて、携帯機２の所在位置の判断を行う。また、閾値テーブルにおける強度値（及び強度閾値）が整数である。従って、非線形ＳＶＭ等を用いた連続的（ｄｏｕｂｌｅ型）判定式を用いて携帯機２の所在位置の判断を行う場合に比べ、制御部１１の処理負担を減らすことができ、かつ早い処理が可能である。更に、携帯機２の所在位置の判断にかかるメモリ量を大きく低減できる。 As described above, in the first embodiment, the location of the portable device 2 is determined based on the threshold value table. Also, the intensity value (and the intensity threshold) in the threshold table is an integer. Therefore, compared with the case where the determination of the location of the portable device 2 is performed using a continuous (double type) determination formula using a non-linear SVM or the like, the processing load on the control unit 11 can be reduced and faster processing is possible. It is. Furthermore, the amount of memory required to determine the location of the portable device 2 can be greatly reduced.
　また、非線形ＳＶＭにより算出された判定式を近似式に置き換える方法を用いて携帯機２の所在位置を判断する場合に比べても、近似誤差による判定精度の悪化の虞が無い。 In addition, there is no risk of deterioration of the determination accuracy due to the approximation error, as compared to the case where the location of the portable device 2 is determined using a method of replacing the determination formula calculated by the non-linear SVM with an approximation formula.
（実施形態２）
　図７は、実施形態２に係る車両用通信システム１００の一構成例を示す模式図であり、図８は、実施形態２に係る車載機１の一構成例を示すブロック図である。本実施形態２に係る車両用通信システム１００は、実施形態１と略同様の構成を有する。しかし、実施形態２に係る車両用通信システム１００においては、３つの送信アンテナ３が車両Ｃに設けられており、この点において、実施形態１と相違する。 Second Embodiment
FIG. 7 is a schematic view showing one configuration example of the vehicle communication system 100 according to the second embodiment, and FIG. 8 is a block diagram showing one configuration example of the in-vehicle apparatus 1 according to the second embodiment. The vehicular communication system 100 according to the second embodiment has a configuration substantially similar to that of the first embodiment. However, in the vehicle communication system 100 according to the second embodiment, the three transmission antennas 3 are provided in the vehicle C, and this point is different from the first embodiment.
　実施形態２に係る車両Ｃには第１送信アンテナ３１、第２送信アンテナ３２及び第３送信アンテナ３３が設けられている。第１送信アンテナ３１及び第２送信アンテナ３２については既に説明しており、詳しい説明を省略する。 The vehicle C according to the second embodiment is provided with a first transmission antenna 31, a second transmission antenna 32, and a third transmission antenna 33. The first transmitting antenna 31 and the second transmitting antenna 32 have already been described, and the detailed description will be omitted.
　第３送信アンテナ３３は車両Ｃの車室内中央部に設けられている。例えば、車両Ｃが運転席及び助手席と１列の後部座席とを備えている場合、第３送信アンテナ３３は、当該運転席及び助手席の間に設けられたアームレスト、コンソールボックス等の適宜箇所に設けられている。また、第３送信アンテナ３３は車室内中央部に設けられていれば、上述の例に限られない。 The third transmission antenna 33 is provided at the center of the vehicle interior of the vehicle C. For example, when the vehicle C includes a driver's seat and a passenger seat, and a row of rear seats, the third transmission antenna 33 is an appropriate place such as an armrest or a console box provided between the driver's seat and the passenger seat. Provided in The third transmission antenna 33 is not limited to the above-described example as long as it is provided at the center of the vehicle interior.
　また、図８に示しているように、実施形態２における車載機１では３つの送信アンテナ３１～３３のうち、制御部１１の制御に応じて切替器１３ａにて選択された一の送信アンテナ３を介して無線信号が携帯機２に送信される。信号が送信された送信アンテナ３を携帯機２が識別できるように、斯かる無線信号は第１送信アンテナ３１、第２送信アンテナ３２及び第３送信アンテナ３３から順次送信される。 Further, as shown in FIG. 8, in the in-vehicle device 1 according to the second embodiment, one of the three transmitting antennas 31 to 33 is one transmitting antenna 3 selected by the switch 13 a according to the control of the control unit 11. The wireless signal is transmitted to the portable device 2 via Such radio signals are sequentially transmitted from the first transmission antenna 31, the second transmission antenna 32, and the third transmission antenna 33 so that the portable device 2 can identify the transmission antenna 3 to which the signal has been transmitted.
　更に、実施形態２に係る記憶部１４は複数の閾値テーブルを記憶している。記憶部１４は、少なくとも２つの送信アンテナ３の組み合わせ毎に閾値テーブルを記憶している。すなわち、実施形態２においては、３つの送信アンテナ３１～３３を有するので、少なくとも３つの閾値テーブルを記憶している。 Furthermore, the storage unit 14 according to the second embodiment stores a plurality of threshold tables. The storage unit 14 stores a threshold value table for each combination of at least two transmission antennas 3. That is, in the second embodiment, since there are three transmitting antennas 31 to 33, at least three threshold tables are stored.
　詳しくは、記憶部１４には、第１送信アンテナ３１及び第２送信アンテナ３２の夫々に係る測定受信信号強度からなる２次元ベクトルを用いた判定式に基づく閾値テーブルを記憶している。斯かる閾値テーブルでは、第１送信アンテナ３１及び第２送信アンテナ３２のうち、何れか一方（例えば、第１送信アンテナ３１）の測定受信信号強度に係る強度値と、第２送信アンテナ３２の測定受信信号強度に基づいて携帯機２の所在位置を判断する際に用いられる強度閾値とが関連付けられている。
　また、記憶部１４には、第１送信アンテナ３１及び第３送信アンテナ３３の夫々に係る測定受信信号強度からなる２次元ベクトルを用いた判定式に基づく閾値テーブルを記憶している。斯かる閾値テーブルでは、第１送信アンテナ３１及び第３送信アンテナ３３のうち、何れか一方（例えば、第１送信アンテナ３１）の測定受信信号強度に係る強度値と、第３送信アンテナ３３の測定受信信号強度に基づいて携帯機２の所在位置を判断する際に用いられる強度閾値とが関連付けられている。
　更に、記憶部１４には、第３送信アンテナ３３及び第２送信アンテナ３２の夫々に係る測定受信信号強度からなる２次元ベクトルを用いた判定式に基づく閾値テーブルを記憶している。斯かる閾値テーブルでは、第３送信アンテナ３３及び第２送信アンテナ３２のうち、何れか一方（例えば、第３送信アンテナ３３）の測定受信信号強度に係る強度値と、第２送信アンテナ３２の測定受信信号強度に基づいて携帯機２の所在位置を判断する際に用いられる強度閾値とが関連付けられている。 Specifically, the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32. In such a threshold value table, the intensity value according to the measurement reception signal strength of one of the first transmission antenna 31 and the second transmission antenna 32 (for example, the first transmission antenna 31) and the measurement of the second transmission antenna 32 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength.
Further, the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths related to the first transmission antenna 31 and the third transmission antenna 33, respectively. In such a threshold value table, the intensity value according to the measurement reception signal strength of one of the first transmission antenna 31 and the third transmission antenna 33 (for example, the first transmission antenna 31) and the measurement of the third transmission antenna 33 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength.
Furthermore, the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the third transmission antenna 33 and the second transmission antenna 32. In such a threshold value table, the intensity value according to the measurement reception signal strength of one of the third transmission antenna 33 and the second transmission antenna 32 (for example, the third transmission antenna 33) and the measurement of the second transmission antenna 32 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength.
　また、記憶部１４が、前記閾値テーブルにおける強度値と閾値強度とを置き換えた、他の閾値テーブルを更に記憶していても良い。
　すなわち、第１送信アンテナ３１及び第２送信アンテナ３２のうち、他の一方（第２送信アンテナ３２）の測定受信信号強度に係る強度値及び強度閾値を有する閾値テーブルと、第１送信アンテナ３１及び第３送信アンテナ３３のうち、他の一方（例えば、第３送信アンテナ３３）の測定受信信号強度に係る強度値及び強度閾値を有する閾値テーブルと、第３送信アンテナ３３及び第２送信アンテナ３２のうち、他の一方（例えば、第２送信アンテナ３２）の測定受信信号強度に係る強度値及び強度閾値を有する閾値テーブルとを、記憶部１４が更に記憶しても良い。 In addition, the storage unit 14 may further store another threshold value table in which the intensity value and the threshold value intensity in the threshold value table are replaced.
That is, a threshold table having an intensity value and an intensity threshold relating to the measured reception signal strength of the other one (second transmission antenna 32) of the first transmission antenna 31 and the second transmission antenna 32, the first transmission antenna 31 and A threshold value table having an intensity value and an intensity threshold value related to the measured reception signal strength of the other one (for example, the third transmission antenna 33) of the third transmission antenna 33, the third transmission antenna 33 and the second transmission antenna 32 Among these, the storage unit 14 may further store a threshold value table having an intensity value and an intensity threshold value related to the measured reception signal intensity of the other one (for example, the second transmission antenna 32).
　図９は、実施形態２に係る制御部１１の要部構成を示す機能ブロック図である。制御部１１はＣＰＵ１１１、内外判定部１１２、出力制御部１１３、決定部１１４、テーブル選択部１１５等を備える。ＣＰＵ１１１、内外判定部１１２及び出力制御部１１３については既に説明しており、詳しい説明を省略する。 FIG. 9 is a functional block diagram showing the main configuration of the control unit 11 according to the second embodiment. The control unit 11 includes a CPU 111, an inside / outside determination unit 112, an output control unit 113, a determination unit 114, a table selection unit 115, and the like. The CPU 111, the inside / outside determination unit 112, and the output control unit 113 have already been described, and the detailed description will be omitted.
　決定部１１４は、特定信号が受信された場合、第１送信アンテナ３１、第２送信アンテナ３２及び第３送信アンテナ３３のうち、２つの送信アンテナを決定する。詳しくは、閾値テーブルにおける強度値に係る一の送信アンテナと、閾値強度に係る他の送信アンテナとを決定する。特定信号は、例えば、車両ドアの解錠又は施錠を制御するための車両ドア制御信号、エンジンの始動を制御するためのエンジン始動制御信号等である。 The determination unit 114 determines two transmission antennas among the first transmission antenna 31, the second transmission antenna 32, and the third transmission antenna 33 when the specific signal is received. Specifically, one transmission antenna according to the strength value in the threshold value table and another transmission antenna according to the threshold strength are determined. The specific signal is, for example, a vehicle door control signal for controlling the unlocking or locking of the vehicle door, an engine start control signal for controlling the start of the engine, or the like.
　斯かる決定の際、決定部１１４は、受信された特定信号の送信元に基づいて行う。例えば、前記特定信号が車両ドア制御信号である場合、斯かる車両ドア制御信号が第１車両ドアリクエストスイッチ５１及び第２車両ドアリクエストスイッチ５２のどこから送信されたかに基づいて、決定部１１４は２つの送信アンテナ３の決定を行う。 At the time of such determination, the determination unit 114 performs based on the transmission source of the received specific signal. For example, when the specific signal is a vehicle door control signal, the determination unit 114 determines whether the vehicle door control signal is transmitted from the first vehicle door request switch 51 or the second vehicle door request switch 52. Determine the three transmit antennas 3.
　具体的に、決定部１１４は受信された特定信号の送信元に最も近い送信アンテナ３を２つ決定する。例えば、受信された車両ドア制御信号の送信元が、第１車両ドアリクエストスイッチ５１である場合、すなわち、ユーザが車両Ｃの運転席側の第１車両ドアリクエストスイッチ５１に触れた場合、決定部１１４は、第１車両ドアリクエストスイッチ５１に最も近い、第１送信アンテナ３１及び第３送信アンテナ３３を決定する。 Specifically, the determination unit 114 determines two transmission antennas 3 closest to the transmission source of the received specific signal. For example, when the transmission source of the received vehicle door control signal is the first vehicle door request switch 51, that is, when the user touches the first vehicle door request switch 51 on the driver's side of the vehicle C, the determination unit A step 114 determines the first transmitting antenna 31 and the third transmitting antenna 33 which are closest to the first vehicle door request switch 51.
　テーブル選択部１１５は、決定部１１４の決定結果に基づいて、記憶部１４が記憶している複数の閾値テーブルから何れかの閾値テーブルを選択する。すなわち、テーブル選択部１１５は、決定部１１４によって決定された２つの送信アンテナ３の夫々に係る測定受信信号強度からなる２次元ベクトルを用いた判定式に基づく閾値テーブルを選択する。
　例えば、決定部１１４が第１送信アンテナ３１及び第２送信アンテナ３２を決定した場合、テーブル選択部１１５は、第１送信アンテナ３１及び第２送信アンテナ３２夫々に係る測定受信信号強度からなる２次元ベクトルを用いた判定式に基づく閾値テーブルを選択する。 The table selection unit 115 selects one of the plurality of threshold value tables stored in the storage unit 14 based on the determination result of the determination unit 114. That is, the table selection unit 115 selects the threshold value table based on the determination formula using the two-dimensional vector consisting of the measurement reception signal strengths of the two transmission antennas 3 determined by the determination unit 114.
For example, when the determination unit 114 determines the first transmission antenna 31 and the second transmission antenna 32, the table selection unit 115 determines the two-dimensional configuration of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32, respectively. A threshold table is selected based on a decision formula using a vector.
　図１０は、実施形態２に係る車両用通信システム１００が車両制御を行う場合の一処理例を示すフローチャートである。以下においては、説明の便宜上、ユーザが車両Ｃの運転席側の第１車両ドアリクエストスイッチ５１に触れることにより、決定部１１４が第１送信アンテナ３１及び第３送信アンテナ３３を決定する場合を例に挙げて説明する。 FIG. 10 is a flowchart illustrating an example of processing when the vehicular communication system 100 according to the second embodiment performs vehicle control. In the following, for convenience of explanation, when the user touches the first vehicle door request switch 51 on the driver's seat side of the vehicle C, the determination unit 114 determines the first transmission antenna 31 and the third transmission antenna 33. I will list and explain.
　制御部１１のＣＰＵ１１１はリクエスト信号が入力されたか否かを判定する（ステップＳ２０１）。斯かるリクエスト信号は、例えば車両ドアの施錠又は解錠の要求に係る信号であるとする。 The CPU 111 of the control unit 11 determines whether a request signal is input (step S201). Such a request signal is, for example, a signal relating to a request for locking or unlocking the vehicle door.
　ＣＰＵ１１１はリクエスト信号が入力されていないと判定した場合（ステップＳ２０１：ＮＯ）、リクエスト信号が入力されたと判定するまで、斯かる判定を繰り返す。 When the CPU 111 determines that the request signal is not input (step S201: NO), the determination is repeated until it is determined that the request signal is input.
　一方、ユーザが車両Ｃの運転席側の第１車両ドアリクエストスイッチ５１に触れた場合、ＣＰＵ１１１によって、リクエスト信号が入力されたと判定される（ステップＳ２０１：ＹＥＳ）。
　この際、決定部１１４は第１車両ドアリクエストスイッチ５１に最も近い第１送信アンテナ３１及び第３送信アンテナ３３を決定する（ステップＳ２０２）。 On the other hand, when the user touches the first vehicle door request switch 51 on the driver's seat side of the vehicle C, the CPU 111 determines that the request signal is input (step S201: YES).
At this time, the determination unit 114 determines the first transmission antenna 31 and the third transmission antenna 33 closest to the first vehicle door request switch 51 (step S202).
　次いで、テーブル選択部１１５は、決定部１１４によって決定された第１送信アンテナ３１及び第３送信アンテナ３３の夫々に係る測定受信信号強度からなる２次元ベクトルを用いた判定式に基づく閾値テーブルを選択する（ステップＳ２０３）。 Next, the table selection unit 115 selects the threshold value table based on the determination formula using the two-dimensional vector consisting of the measurement reception signal strengths of the first transmission antenna 31 and the third transmission antenna 33 determined by the determination unit 114. (Step S203).
　以降、ステップＳ２０４～ステップＳ２０８の処理は、図６のステップＳ１０２～ステップＳ１０６の処理と同じであり、詳しい説明を省略する。 The processes of steps S204 to S208 are the same as the processes of steps S102 to S106 of FIG. 6, and thus the detailed description will be omitted.
　以上のように、実施形態２においては、特定信号が受信された場合、受信された特定信号の送信元に最も近い２つの送信アンテナ３の測定受信信号強度に基づいて、携帯機２の所在位置の判断を行う。
　従って、ユーザ（携帯機２）に近い送信アンテナ３に係る受信信号強度を用いて携帯機２の所在位置の判断を行うので、斯かる判断における精度を高めることができる。 As described above, in the second embodiment, when the specific signal is received, the location of the portable device 2 based on the measured reception signal strengths of the two transmission antennas 3 closest to the transmission source of the received specific signal. Make a judgment on
Therefore, since the determination of the location of the portable device 2 is performed using the received signal strength of the transmitting antenna 3 close to the user (portable device 2), the accuracy in the determination can be enhanced.
　実施の形態１と同様の部分については、同一の符号を付して詳細な説明を省略する。 About the part similar to Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
　開示された実施形態はすべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上述した意味ではなく、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。 The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is indicated not by the meaning described above but by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.
　１　車載機
　２　携帯機
　１４　記憶部
　３１　第１送信アンテナ
　３２　第２送信アンテナ
　３３　第３送信アンテナ
　１００　車両用通信システム
　１１２　内外判定部
　１１３　出力制御部
　１１４　決定部
　１１５　テーブル選択部 DESCRIPTION OF SYMBOLS 1 in-vehicle device 2 portable device 14 storage unit 31 first transmission antenna 32 second transmission antenna 33 third transmission antenna 100 communication system for vehicle 112 inside / outside determination unit 113 output control unit 114 determination unit 115 table selection unit

Claims (12)

  1. 　複数のアンテナを介して車室の内外に信号を送信する車載機と、各アンテナから送信された信号の受信信号強度を送信する携帯機とを備える車両用通信システムであって、
    　前記車載機は、
    　前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルを記憶する記憶部と、
    　前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定部と、
    　前記内外判定部の判定結果に基づいて、車両ドアを開錠する信号を出力する出力制御部と
    　を備える車両用通信システム。     A vehicle communication system comprising: an on-vehicle device for transmitting signals into and out of a vehicle compartment via a plurality of antennas; and a portable device for transmitting received signal strengths of signals transmitted from the respective antennas,
    The in-vehicle device is
    A storage unit that stores a threshold table of strength threshold values according to received signal strengths that can be received from the portable device;
    An inside / outside determination unit that determines whether the portable device is inside or outside the vehicle based on the strength of the received signal of the one antenna and the other antenna received from the portable device and the strength threshold value; ,
    An output control unit that outputs a signal for unlocking a vehicle door based on the determination result of the inside / outside determination unit.
  2. 　前記複数のアンテナは３つ以上であり、
    　前記記憶部は少なくとも２つのアンテナの組み合わせ毎に前記閾値テーブルを記憶しており、
    　前記車載機は、
    　特定信号が受信された場合、前記一のアンテナ及び前記他のアンテナの決定を行う決定部と、
    　前記決定部の決定結果に基づいて、何れかの閾値テーブルを選択するテーブル選択部と
    　を備える請求項１に記載の車両用通信システム。     The plurality of antennas is three or more,
    The storage unit stores the threshold table for each combination of at least two antennas,
    The in-vehicle device is
    A determination unit that determines the one antenna and the other antenna when a specific signal is received;
    The communication system for vehicles according to claim 1 provided with a table selection part which chooses any threshold table based on a decision result of said deciding part.
  3. 　前記決定部は、前記特定信号の送信元に基づいて、前記決定を行う請求項２に記載の車両用通信システム。 The vehicular communication system according to claim 2, wherein the determination unit makes the determination based on a transmission source of the specific signal.
  4. 　前記内外判定部は、
    　前記他のアンテナに係る受信信号強度が、前記一のアンテナに係る受信信号強度に対応する強度閾値以上である場合、前記携帯機が車室内にあると判定する請求項２又は３に記載の車両用通信システム。     The inside / outside determination unit
    The vehicle according to claim 2 or 3, wherein it is determined that the portable device is in the vehicle compartment when the received signal strength of the other antenna is equal to or greater than a strength threshold corresponding to the received signal strength of the one antenna. Communication system.
  5. 　前記一のアンテナに係る受信信号強度の値は整数である請求項１から４の何れか一つに記載の車両用通信システム。 The communication system for vehicles according to any one of claims 1 to 4, wherein the value of the received signal strength concerning the one antenna is an integer.
  6. 　複数のアンテナを介して車室の内外に信号を送信し、各アンテナから送信された信号の受信信号強度を携帯機から受信する車載機であって、
    　前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルを記憶する記憶部と、
    　前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度と、前記強度閾値とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定部と、
    　前記内外判定部の判定結果に基づいて、車両ドアを解錠する信号を出力する出力制御部と
    　を備える車載機。     An in-vehicle device that transmits signals to and from a cabin through a plurality of antennas and receives received signal strength of signals transmitted from each antenna from a portable device,
    A storage unit that stores a threshold table of strength threshold values according to received signal strengths that can be received from the portable device;
    An inside / outside determination unit that determines whether the portable device is inside or outside the vehicle based on the strength of the received signal of the one antenna and the other antenna received from the portable device and the strength threshold value; ,
    An output control unit that outputs a signal for unlocking a vehicle door based on the determination result of the inside / outside determination unit.
  7. 　前記複数のアンテナは３つ以上であり、
    　前記記憶部は少なくとも２つのアンテナの組み合わせ毎に前記閾値テーブルを記憶しており、
    　特定信号が受信された場合、前記一のアンテナ及び前記他のアンテナの決定を行う決定部と、
    　前記決定部の決定結果に基づいて、何れかの閾値テーブルを選択するテーブル選択部と
    　を備える請求項６に記載の車載機。     The plurality of antennas is three or more,
    The storage unit stores the threshold table for each combination of at least two antennas,
    A determination unit that determines the one antenna and the other antenna when a specific signal is received;
    The in-vehicle device according to claim 6, further comprising: a table selection unit that selects any threshold table based on the determination result of the determination unit.
  8. 　前記決定部は、前記特定信号の送信元に基づいて、前記決定を行う請求項７に記載の車載機。 The in-vehicle device according to claim 7, wherein the determination unit makes the determination based on a transmission source of the specific signal.
  9. 　前記内外判定部は、
    　前記他のアンテナに係る受信信号強度が、前記一のアンテナに係る受信信号強度に対応する強度閾値以上である場合、前記携帯機が車室内にあると判定する請求項７又は８に記載の車載機。     The inside / outside determination unit
    The on-vehicle apparatus according to claim 7 or 8, wherein it is determined that the portable device is in the vehicle compartment when the received signal strength of the other antenna is equal to or greater than a strength threshold corresponding to the received signal strength of the one antenna. Machine.
  10. 　前記一のアンテナに係る受信信号強度の値は整数である請求項６から９の何れか一つに記載の車載機。 The in-vehicle apparatus according to any one of claims 6 to 9, wherein the value of the received signal strength of the one antenna is an integer.
  11. 　複数のアンテナを介して車室の内外に信号を送信し、各アンテナから送信された信号の受信信号強度を携帯機から受信する車載機が車両を制御する車両制御方法であって、
    　前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルと、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行う内外判定ステップと、
    　前記内外判定ステップでの判定結果に基づいて、車両ドアを解錠する信号を出力するステップと
    　を含む車両制御方法。     A vehicle control method for controlling a vehicle, wherein an in-vehicle device transmits signals from inside and outside the cabin via a plurality of antennas and receives received signal strength of signals transmitted from each antenna from a portable device,
    The portable device is installed in the vehicle compartment based on a threshold table of strength thresholds according to received signal strengths that can be received from the portable device, and received signal strengths for one antenna and other antennas received from the portable device. Internal / external determination step to determine if the vehicle is outside the vehicle
    Outputting a signal for unlocking the vehicle door based on the determination result in the inside / outside determination step.
  12. 　複数のアンテナから送信された信号に対する受信信号強度を携帯機から受信し、
    　前記携帯機から受信し得る受信信号強度に応じた強度閾値の閾値テーブルと、前記携帯機から受信した一のアンテナ及び他のアンテナに係る受信信号強度とに基づいて、前記携帯機が車室内にあるか車室外にあるかの判定を行い、
    　前記判定の結果に基づいて、車両ドアを解錠する信号を出力する
    　処理をコンピュータに実行させるコンピュータプログラム。     Receive signal strength from signals transmitted from multiple antennas from the portable device,
    The portable device is installed in the vehicle compartment based on a threshold table of strength thresholds according to received signal strengths that can be received from the portable device, and received signal strengths for one antenna and other antennas received from the portable device. Determine if there is any or outside the vehicle,
    A computer program that causes a computer to execute processing for outputting a signal for unlocking a vehicle door based on the result of the determination.
PCT/JP2018/033174 2017-09-21 2018-09-07 Communication system for vehicle, vehicle-mounted device, vehicle control method and computer program WO2019058996A1 (en)

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