In-vehicle information device and in-vehicle wireless

Abstract

To provide an on-vehicle information device and an on-vehicle radio system for urging an occupant to improve radio wave interference to radio communication in a cabin.SOLUTION: A display audio device is disposed in the cabin of the vehicle 100. The display audio device is a device that allows an occupant of the vehicle 100 to enjoy a video work or a music work. In addition, the display audio device is wirelessly connected to a mobile phone or the like by a smartphone 400 of the occupant, thereby realizing a hands-free call. The display audio device comprises a display 30, a microphone 40, a speaker 60 and an antenna 70. The hands-free call is an example of "wireless communication". The display audio device is an example of an "in-vehicle information device". The smartphone 400 is an example of a "wireless communication device".SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an in-vehicle information device and an in-vehicle radio system. [Background technology]

[0002] Wireless communication is used in a variety of fields. When radio wave interference occurs in wireless communication, problems such as a decrease in communication speed can occur. Therefore, a technology has been proposed that detects the presence or absence of radio wave interference and, if radio wave interference is detected, notifies the user that radio wave interference is occurring (see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-159018 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-054303 Summary of the Invention [Problem to be solved by the invention]

[0004] Even if a vehicle occupant is notified of radio wave interference with wireless communication, such as hands-free calling, within the vehicle cabin, it is not easy for the vehicle occupant to understand how to eliminate the radio wave interference.

[0005] An object of one aspect of the disclosed technology is to provide an in-vehicle information device and an in-vehicle wireless system that can prompt an occupant to improve radio wave interference with wireless communications within the vehicle cabin. [Means for solving the problem]

[0006] One aspect of the disclosed technology is exemplified by the following in-vehicle information device: The wireless device is a wireless device installed in a vehicle cabin, and includes a control unit that, when detecting generation of radio waves that interfere with wireless communication by the wireless device, executes a determination process to determine the location of the wireless device that is the source of the radio waves, and a notification process to notify the user of the determined location. [Effects of the Invention]

[0007] According to the disclosed technology, it is possible to prompt occupants to improve radio wave interference with wireless communications within the vehicle cabin. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating an example of a vehicle according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating an example of a hardware configuration of the display audio device according to the embodiment. [Figure 3] FIG. 3 is a diagram illustrating an example of a processing block of the display audio device according to the embodiment. [Figure 4] FIG. 4 is a diagram illustrating an example of a management table stored in the management database in the embodiment. [Figure 5] FIG. 5 is a diagram illustrating an example of a notification screen according to the embodiment. [Figure 6] FIG. 6 is a first diagram illustrating the position identification process performed by the detection unit in the embodiment. [Figure 7] FIG. 7 is a second diagram illustrating the position identification process performed by the detection unit in the embodiment. [Figure 8] FIG. 8 is a diagram showing an example of a processing flow of the display audio device according to the embodiment. [Figure 9] FIG. 9 is a diagram showing an example of a processing block of a display audio device according to a first modified example. [Figure 10] FIG. 10 is a diagram showing an example of a notification screen output by a notification unit in the first modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Embodiment> Hereinafter, an embodiment will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a vehicle 100 according to an embodiment. FIG. 1 is a diagram showing the vehicle 100 as viewed from above. In addition, FIG. 1 does not show the ceiling in order to explain the interior of the vehicle 100. The vehicle 100 is, for example, a passenger car. Tires 80, 80, 80, 80 are arranged on the vehicle 100.

[0010] Vehicle 100 is equipped with passenger seats, including a driver's seat 1, a passenger seat 2, a right rear seat 3, a center rear seat 4, and a left rear seat 5. The driver's seat 1 and the passenger seat 2 are arranged in a row along the width direction of vehicle 100. The right rear seat 3, the center rear seat 4, and the left rear seat 5 are arranged in a row along the width direction of vehicle 100 behind the driver's seat 1 and the passenger seat 2. A dashboard 10 is arranged in front of the driver's seat 1 and the passenger seat 2. A steering wheel 20 is arranged in front of the driver's seat 1. The vehicle 100 is also equipped with doors 50 for getting in and out, including a right front door 51, a left front door 52, a right rear door 53, and a left rear door 54. The right front door 51 is arranged to the right of the driver's seat 1. The left front door 52 is arranged to the left of the passenger seat 2. The right rear door 53 is arranged to the right of the right rear seat 3. The left rear door 54 is disposed on the left side of the left rear seat 6 .

[0011] A display-audio device 200 is arranged in the cabin of the vehicle 100. The display-audio device 200 is a device that allows passengers of the vehicle 100 to enjoy video and musical works. The display-audio device 200 also realizes hands-free calling by wirelessly connecting to a mobile phone, such as a smartphone 400, carried by the passenger. The display-audio device 200 has a display 30, a microphone 40, a speaker 60, and an antenna 70. Hands-free calling is an example of "wireless communication." The display-audio device 200 is an example of "in-vehicle information equipment." The smartphone 400 is an example of "wireless communication equipment."

[0012] A display 30 and a microphone 40 are arranged on the dashboard 10. For example, images of various video works and messages to the occupants from the display audio device 200 are output to the display 30. For example, the voice of the occupant is input to the microphone 40.

[0013] Furthermore, a speaker 60 and an antenna 70 of the vehicle 100 are disposed in each of the doors 50. A right front speaker 61 and a right front antenna 71 are disposed in the right front door 51. A left front speaker 62 and a left front antenna 72 are disposed in the left front door 52. A right rear speaker 63 and a right rear antenna 73 are disposed in the right rear door 53. A left rear speaker 64 and a left rear antenna 74 are disposed in the left rear door 54. The speaker 60 outputs sound from a video work or music. Furthermore, during hands-free calling, the display audio device 200 causes the microphone 40 to receive input of the passenger's voice and outputs the voice of the other party to the speaker 60.

[0014] 2 is a diagram showing an example of the hardware configuration of a display-audio device 200 according to an embodiment. The display-audio device 200 includes a CPU 21, a main memory unit 22, an auxiliary memory unit 23, a communication unit 24, a display 30, a microphone 40, a speaker 60, an antenna 70, and a connection bus B1. The communication unit 24, the display 30, the microphone 40, the speaker 60, and the antenna 70 are connected to one another by a connection bus B1. Note that the connection bus B1 may include a Controller Area Network (CAN).

[0015] The CPU 21 is also referred to as a microprocessor unit (MPU) or processor. The CPU 21 is not limited to a single processor and may have a multiprocessor configuration. Furthermore, a single CPU 21 connected via a single socket may have a multi-core configuration. At least a portion of the processing performed by the CPU 21 may be performed by a processor other than the CPU 21, such as a dedicated processor, such as a digital signal processor (DSP), a graphics processing unit (GPU), a numerical calculation processor, a vector processor, or an image processing processor. Furthermore, at least a portion of the processing performed by the CPU 21 may be performed by an integrated circuit (IC) or other digital circuit. Furthermore, at least a portion of the CPU 21 may include an analog circuit. Examples of integrated circuits include large-scale integrated circuits (LSIs), application-specific integrated circuits (ASICs), and programmable logic devices (PLDs). Examples of PLDs include field-programmable gate arrays (FPGAs). The CPU 21 may be a combination of a processor and an integrated circuit. This combination is called, for example, a microcontroller unit (MCU), a system-on-a-chip (SoC), a system LSI, or a chipset. In the display audio device 200, the CPU 21 loads a program stored in the auxiliary storage unit 23 into a work area in the main storage unit 22 and controls peripheral devices through the execution of the program. This allows the display audio device 200 to execute processing that meets a predetermined purpose. The main storage unit 22 and the auxiliary storage unit 23 are recording media that can be read by the CPU 21. The CPU 21 is an example of a "control unit."

[0016] The main storage unit 22 is exemplified as a storage unit that is directly accessed by the CPU 21. The main storage unit 22 includes a random access memory (RAM) and a read only memory (ROM).

[0017] The auxiliary storage unit 23 stores various programs and various data on a readable and writable recording medium. The auxiliary storage unit 23 is also called an external storage device. The auxiliary storage unit 23 stores an operating system (OS), various programs, various tables, etc. The OS includes a communication interface program that exchanges data with external devices connected via the communication unit 24.

[0018] The auxiliary storage unit 23 is, for example, an erasable programmable ROM (EPROM), a solid state drive (SSD), a hard disk drive (HDD), or the like.

[0019] The communication unit 24 is an interface with a wireless communication device, exemplified by a smartphone 400 carried by the occupant. The communication unit 24 communicates with the wireless communication device, exemplified by the smartphone 400, using, for example, Bluetooth (registered trademark).

[0020] The display 30 displays data processed by the CPU 21 and data stored in the main memory unit 22. The display 30 is, for example, a Liquid Crystal Display (LCD), a Plasma Display Panel (PDP), an inorganic electroluminescence (EL) panel, or an organic EL panel. For example, a touch panel that detects touch operations by a user's finger or the like is superimposed on the display 30. By providing a touch panel superimposed on the display 30, the display audio device 200 can provide the user with an intuitive operating environment.

[0021] The speaker 60 outputs sound. The speaker 60 outputs sound such as the voice of the other party during hands-free calling using the display audio device 200. The microphone 40 is used to capture sound during calls and video.

[0022] Antenna 70 is a directional antenna disposed in door 50. Right front antenna 71 is disposed in right front door 51, and its directionality is directed toward driver's seat 1. Left front antenna 72 is disposed in left front door 52, and its directionality is directed toward passenger seat 2. Right rear antenna 73 is disposed in right rear door 53, and its directionality is directed toward right rear seat 3. Left rear antenna 74 is disposed in left rear door 54, and its directionality is directed toward left rear seat 5.

[0023] <Processing Blocks of the Display Audio Device 200> 3 is a diagram showing an example of processing blocks of a display audio device 200 according to an embodiment. The display audio device 200 includes a registration unit 201, a call processing unit 202, a detection unit 203, a notification unit 204, and a management database (referred to as management DB in the figure) 205. The display audio device 200 executes the processes of each unit of the display audio device 200, such as the registration unit 201, the call processing unit 202, the detection unit 203, the notification unit 204, and the management database 205, by having the CPU 21 execute a computer program that is executable and deployed in the main storage unit 22.

[0024] The management database 205 is a database that manages wireless communication devices, exemplified by the smartphone 400. FIG. 4 is a diagram showing an example of a management table 2051 stored in the management database 205 in the embodiment. The management table 2051 has fields for "ID" and "Owner." Information that uniquely identifies a wireless communication device owned by an occupant is stored in "ID." For example, a Bluetooth Device Address (BD address) may be stored in "ID." Information indicating the owner of the wireless communication device is stored in "Owner." For example, the name of the owner may be stored in "Owner."

[0025] The registration unit 201 accepts registration of information about wireless communication devices in the management table 2051. The registration unit 201 may, for example, output a screen for accepting registration of information about wireless communication devices to the display 30, and accept registration of information about wireless communication devices.

[0026] The call processing unit 202 executes a hands-free call using a wireless communication device (for example, a smartphone 400) registered in the management table 2051 by the registration unit 201. The call processing unit 202 receives, for example, the input of a passenger's voice via the microphone 40 and transmits the received voice to the other party. The call processing unit 202 also outputs the voice received from the other party to the speaker 60.

[0027] The detection unit 203 detects radio waves (hereinafter also referred to as "jamming waves") that degrade the quality of hands-free calls. The detection unit 203 monitors, for example, indicators of the quality of hands-free calls. Examples of indicators of the quality of calls include the bit error rate (BER) and received signal strength indicator (RSSI) in communication between the display audio device 200 and the smartphone 400. Note that, because it is possible that the RSSI is good even when the BER is poor due to signal reflections in the vehicle cabin, etc., it is considered that the BER is more preferable as an indicator of the quality of calls than the RSSI. The detection unit 203 monitors the monitored When the call quality index falls below the threshold, the detection unit 203 executes a process to identify the location of the output source that is outputting the interfering wave. The process to identify the location of the output source will be described later. Furthermore, if the detection unit 203 can identify the ID of the output source that is outputting the interfering wave, the detection unit 203 refers to the management table 2051 based on the identified ID to identify the owner of the wireless communication device that is the output source of the interfering wave.

[0028] When the detection unit 203 identifies the output source of the interfering wave, the notification unit 204 notifies the occupant of the identified location. The notification to the occupant is performed, for example, by outputting a sound from the speaker 60 or by outputting a notification screen on the display 30. Fig. 5 is a diagram showing an example of a notification screen 2041 in the embodiment. The notification screen 2041 includes an overhead view 2042, a marker 2043, a text box 2044, and a text box 2045.

[0029] The overhead view 2042 is a diagram illustrating an example of the cabin of the vehicle 100 as viewed from above. The marker 2043 is a marker indicating the position of the output source that outputs the interfering wave, which has been identified by the detection unit 203. In the example of FIG. 5, the marker 2043 indicates the passenger seat 2. A message indicating the position of the output source that outputs the interfering wave is output in the text box 2044. That is, in the notification screen 2041, the marker 2043 and the text box 2044 indicate the position of the output source that outputs the interfering wave.

[0030] A message indicating a measure to reduce the effect of interference waves on hands-free calls is output in text box 2045. In the example of FIG. 5, a message is output when detection unit 203 identifies the owner of the wireless communication device that is the output source of the interference waves. For example, a message such as "<Name> in <Seat location>, please turn off your Bluetooth device" is pre-stored in auxiliary storage unit 23, and notification unit 204 simply replaces <Seat location> in the stored message with the seat of the wireless communication device that is the output source of the interference waves identified by detection unit 203, and replaces <Name> with the name identified by detection unit 203. Furthermore, when the owner of the wireless communication device that is the output source of the interference waves cannot be identified, such as when the wireless communication device that is the output source of the interference waves is not registered in management table 2051, notification unit 204 simply replaces <Name> with "person," for example, "person in the passenger seat."

[0031] <Processing to identify the location of the source that emits interference waves> The position identification process by the detection unit 203 will be described with reference to the drawings. FIG. 6 is a first diagram illustrating the position identification process by the detection unit 203 in this embodiment. In FIG. 6, it is assumed that an occupant holding a smartphone 300, which is an output source of interference waves, is sitting in the passenger seat 2. In this case, interference waves such as Bluetooth from the smartphone 300 are detected by all of the antennas 70 whose directivity is directed into the vehicle cabin. Furthermore, the left front antenna 72, which is located closest to the smartphone 300 among the antennas 70, is most strongly affected by interference waves such as Bluetooth from the smartphone 300.

[0032] The detection unit 203 determines that the smartphone 300 is present inside the vehicle cabin because interference waves such as Bluetooth from the smartphone 300 are detected by all of the antennas 70. Furthermore, the detection unit 203 determines that the smartphone 300 is present in the passenger seat 2 because the left front antenna 72 receives the interference waves such as Bluetooth from the smartphone 300 most strongly. In this way, the detection unit 203 detects that the source of the interference waves is present inside the vehicle cabin of the vehicle 100 because the interference waves are received by all of the antennas 70. Furthermore, the detection unit 203 detects the position of the source of the interference waves inside the vehicle cabin based on the strength of the interference waves received by the antennas 70.

[0033] 7 is a second diagram illustrating the location identification process by the detection unit 203 in the embodiment. In FIG. 7, a passerby carrying a smartphone 300, which is an output source of an interference wave, approaches the vehicle 100. Assume that the person is outside the vehicle on the side of right front door 51. In this case, since the directivity of antenna 70 is directed toward the interior of the vehicle, right front antenna 71 and right rear antenna 73 of antenna 70 do not detect interference waves from smartphone 300. On the other hand, left front antenna 72 and left rear antenna 74 of antenna 70 detect interference waves from smartphone 300.

[0034] The detection unit 203 determines that the smartphone 300 is present outside the right front door 51 or the right rear door 53 of the vehicle 100 when the left front antenna 72 and the left rear antenna 74 receive the jamming wave while the right front antenna 71 and the right rear antenna 73 do not. In this way, the detection unit 203 detects that the source of the jamming wave is present outside the passenger compartment of the vehicle 100 when at least some of the antennas 70 receive the jamming wave while other some of the antennas 70 do not receive the jamming wave. The detection unit 203 also detects the location of the source of the jamming wave outside the passenger compartment based on which antenna 70 receives the jamming wave. The smartphone 300 is an example of an "other wireless communication device."

[0035] <Processing Flow of the Display Audio Device 200> Fig. 8 is a diagram showing an example of a processing flow of the display audio device 200 according to the embodiment. Hereinafter, an example of the processing flow of the display audio device 200 will be described with reference to Fig. 8. Note that in the processing of Fig. 8, it is assumed that information related to the mobile phones and the like of the passengers riding in the display audio device 200 has been registered in advance in the management table 2051 by the registration unit 201.

[0036] In step S1, the call processor 202 executes a hands-free call using a wireless communication device registered in the management table 2051 (here, the smartphone 400).

[0037] In step S2, the detection unit 203 determines whether the speech quality of the hands-free call has deteriorated below a threshold. If the speech quality has deteriorated below the threshold (YES in step S2), the process proceeds to step S3. If the speech quality is not below the threshold (NO in step S2), the process proceeds to step S6.

[0038] In step S3, the detector 203 detects jamming waves using the antenna 70. If jamming waves are detected (YES in step S3), the process proceeds to step S4. If jamming waves are not detected (NO in step S3), the process proceeds to step S6.

[0039] In step S4, the detection unit 203 identifies the position of the source of the interference wave (here, the smartphone 300) based on the reception state of the interference wave by the antenna .

[0040] In step S5, the notification unit 204 notifies the occupant of the vehicle 100 of the location of the smartphone 300 that is the source of the interference waves identified in step S4. The notification unit 204 may further notify the occupant of a method for reducing the effects of the interference waves.

[0041] In step S6, the call processor 202 determines whether the hands-free call has been ended. The hands-free call is ended, for example, by an operation of the occupant making the call or the call partner of the occupant. If the hands-free call has been ended (YES in step S6), the process ends. If the hands-free call has not been ended (NO in step S6), the process proceeds to step S2.

[0042] <Effects of the embodiment> According to this embodiment, when the quality of hands-free communication drops below a threshold due to interference waves, the detection unit 203 identifies the location of the source of the interference waves using the antenna 70. Then, the notification unit 204 displays a notification screen 2041 that indicates the position of the source of the interference wave identified by the detection unit 203 with a marker 2043. Therefore, according to this embodiment, it is possible to easily prompt the occupant of the vehicle 100 to take measures against the source of the interference wave that degrades the quality of the hands-free call, such as moving the source or turning off the power of the source. In other words, according to this embodiment, it is possible to prompt the occupant of the vehicle 100 to improve radio wave interference with the hands-free call in the passenger compartment of the vehicle 100.

[0043] In this embodiment, when the source of the interfering wave is guided on the notification screen 2041, an overhead view 2042 is output. The overhead view 2042 is a view of the interior of the vehicle 100 as seen from above. By displaying a marker 2043 superimposed on the overhead view 2042, the location of the source of the interfering wave can be visually guided to the occupants of the vehicle 100 in an easy-to-understand manner.

[0044] In this embodiment, information related to the wireless communication devices of the occupants is registered in advance in the management table 2051. Then, when a wireless communication device that is a source of interference waves is registered in the management table 2051, the notification unit 204 also outputs information about the owner of the wireless communication device on the notification screen 2041. Therefore, according to this embodiment, it is possible to urge the owner of the wireless communication device that is a source of interference waves to take measures to prevent the deterioration of the speech quality of hands-free calls.

[0045] <First Modification> In the embodiment described above, the notification unit 204 notifies the source of the interference wave by using a marker 2043 on the notification screen 2041. The notification unit 204 may further notify the location where the quality of hands-free calls can be improved in addition to the source of the interference wave. FIG. 9 is a diagram showing an example of a processing block of the display audio device 200A according to the first modification. The display audio device 200A differs from the display audio device 200 according to the embodiment in that it includes a notification unit 204A instead of the notification unit 204.

[0046] The notification unit 204A stores in advance in the auxiliary storage unit 23 an evacuation position where the generation of interference waves will have minimal impact on the quality of hands-free calls. The evacuation position where the impact on the quality of hands-free calls will be minimal is determined as appropriate, for example, through testing. When notifying the occupant of the location of the source of interference waves, the notification unit 204A also informs the occupant of the destination (the evacuation position pre-stored in the auxiliary storage unit 23) to which the source should be evacuated (moved). FIG. 10 is a diagram showing an example of a notification screen 2041A output by the notification unit 204A in the first modified example. In addition to the marker 2043, the notification screen 2041A outputs a marker 2043A indicating an evacuation position where evacuation of the source of interference waves is expected to improve the quality of hands-free calls. The notification unit 204A may also output a message in a text box 2045 encouraging the occupant to evacuate the wireless communication device.

[0047] According to the first modification, in order to improve the quality of hands-free calls, it is possible to visually and easily notify the occupant of the vehicle 100 of where to move the wireless communication device that is the source of the interference wave. Note that the notification unit 204A may make the indication more visually understandable to the occupant of the vehicle 100 by making the marker 2043A a different color from the other parts of the notification unit 204.

[0048] <Other variations> In the above-described embodiment and modified examples, one source of interference waves is detected, but there may be multiple sources of interference waves. If there are multiple sources of interference waves, the detection unit 203 may identify the location of each of the sources of interference waves. Then, the notification unit 204 may notify the location of each of the identified sources of interference waves on the notification screen 2041.

[0049] When a plurality of wireless communication devices are present in the cabin of the vehicle 100, the detection unit 203 detects the position of a wireless communication device that uses radio waves in a frequency band that does not interfere with hands-free calling. It is not necessary to specify the frequency band that may interfere with hands-free calling. That is, when multiple wireless communication devices are present in the cabin of vehicle 100, detection unit 203 may specify the location of a wireless communication device that uses radio waves in a frequency band that may interfere with hands-free calling. Then, notification unit 204 may notify, on notification screen 2041, the location of the wireless communication device that uses radio waves in a frequency band that may interfere with hands-free calling, as specified by detection unit 203. Note that the frequency band that may interfere with hands-free calling may be stored in advance in auxiliary storage unit 23, for example.

[0050] In the embodiment described above, the right front antenna 71, the left front antenna 72, the right rear antenna 73, and the left rear antenna 74 are arranged in the cabin of the vehicle 100 as the antennas 70 used to identify the position of the source of the jamming wave. However, the arrangement of the antennas 70 used to identify the position of the source of the jamming wave is not limited to this arrangement. For example, one antenna 70 may be arranged at each of three different positions in the cabin of the vehicle 100, and the detection unit 203 may identify the position of the source of the jamming wave by triangulation using these three antennas 70. [Explanation of symbols]

[0051] 1. Driver's seat 2...Passenger seat 3. Right rear seat 4. Center rear seat 5. Left rear seat 10. Dashboard 20··Steering wheel 21 CPU 22...Main memory 23...Auxiliary storage section 24. Communications Department 30··Display 40 microphones 50 doors 51 Right front door 52 Left front door 53 Right rear door 54 Left rear door 60 speakers 61 Right front speaker 62··Front left speaker 63 Right rear speaker 64 Left rear speaker 70··Antenna 71 Right front antenna 72 Left front antenna 73 Right rear antenna 74 Left rear antenna 80··Tire 100 vehicles 200··Display audio device 200A··Display audio device 201··Registration Department 202 Call Processing Unit 203··Detection unit 204·Notification Department 204A·Notification department 205··Management Database 300··Smartphone 400··Smartphone 2041·Notification screen 2041A·Notification screen 2042··Bird's-eye view 2043··Marker 2043A··Marker 2044··Text Box 2045··Text Box 2051 Management Table B1 Connecting bus

Claims

1. An in-vehicle information device capable of wireless communication with a wireless communication device brought into a vehicle cabin, a control unit that, when detecting radio waves from another wireless communication device interfering with the wireless communication device during wireless communication with the wireless communication device, identifies a location of the other wireless communication device and notifies an occupant of the vehicle of the location; In-vehicle information equipment.

2. The control unit further outputting a bird's-eye view of the interior of the vehicle cabin from above onto a display; outputting a marker indicating the position of the other wireless communication device that is a source of the radio waves on the overhead view; The in-vehicle information device according to claim 1 .

3. a storage unit that stores wireless communication devices and information indicating owners of the wireless communication devices in association with each other; The control unit further referring to the storage unit to identify an owner associated with the wireless communication device identified as the source of the radio waves; notifying said identified owner; The in-vehicle information device according to claim 1 .

4. a storage unit configured to store an evacuation position within the vehicle cabin where interference of the radio waves with the wireless communication is minimal, The control unit further notifies the evacuation position. The in-vehicle information device according to claim 1 .

5. The control unit further A bird's-eye view from above is output to the display, outputting a marker indicating the evacuation position on the overhead view; The in-vehicle information device according to claim 4.

6. A plurality of antennas are arranged in the vehicle interior, The control unit further identifies the position of the wireless communication device that is a source of the radio waves based on the intensity of the radio waves received by the antenna. The in-vehicle information device according to any one of claims 1 to 5.

7. an in-vehicle information device capable of wireless communication with a wireless communication device brought into a vehicle interior; a display installed in the vehicle interior, The in-vehicle information device includes: When radio waves from another wireless communication device interfering with the wireless communication device are detected during wireless communication with the wireless communication device, the location of the other wireless communication device is identified and the location is notified to an occupant of the vehicle. In-car radio system.

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