JP2004343618A - On-vehicle electronic equipment and radio communication method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide on-vehicle electronic equipment which makes radio communication between vehicles possible even when the vehicle location of an opposite party is unknown at first. <P>SOLUTION: This radio communication method in the on-vehicle electronic equipment at least having a navigation function and a radio communication function includes the following steps. The method includes a step for performing radio communication to the opposite party's vehicle via a public radio line, a step for acquiring positional information of the opposite party's vehicle from the opposite party's vehicle, and a step for establishing the radio communication between vehicles with the opposite party's vehicle on the basis of the positional information. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an in-vehicle electronic device capable of transmitting and receiving data by wireless communication, and more particularly to an in-vehicle electronic device that enables wireless communication with a specific vehicle between vehicles and a wireless communication method using the same.
[0002]
[Prior art]
The navigation device presents information on facilities and restaurants by utilizing various databases in addition to a basic navigation function for searching for and guiding a route to a destination, or a VICS (Vehicle Information & Communication). Some of the navigation devices are equipped with an advanced and diversified function by presenting road traffic information using the System, or by incorporating an audio function and a television function in a complex manner.
[0003]
Further, the navigation device is provided with a communication function for performing wireless communication with the outside. For example, a mobile phone, a personal digital assistant (PDA), a personal computer, or the like is connected to the navigation device, or a communication module built in the navigation device is used to connect to the Internet to download desired data or specify data. It is possible to exchange information such as images and mails with other parties.
[0004]
In addition to such wireless communication using a public wireless line, a technology for performing wireless communication between vehicles has been developed. For example, by mounting a communication terminal device using a frequency band that can be used without special permission, such as Bluetooth using a communication frequency band of 2.5 GHz, on a vehicle, a local area network (LAN) can be freely constructed between the vehicles. can do.
[0005]
By forming a local area network between vehicles, road traffic information can be shared between vehicles or information can be exchanged between vehicles as needed. In this case, since it is not necessary to use an existing communication infrastructure such as a mobile phone, communication costs can be reduced, and information on traffic congestion and accidents around the own vehicle position can be obtained in real time. It is also possible to quickly search for a detour that bypasses the congested position.
[0006]
Regarding data communication between vehicles, for example, Patent Literature 1 displays, on an in-vehicle display, the traveling positions of the own vehicle and another vehicle, and also displays a message input from the own vehicle and another vehicle, thereby It discloses a function for communication between vehicles.
[0007]
[Patent Document 1]
JP-A-8-68650
[Problems to be solved by the invention]
However, in order to enable data communication between vehicles, the positions of the vehicles must be known. For example, when data communication with a specific vehicle is desired, it is virtually impossible to perform data communication with the specific vehicle via a network unless it is known where the specific vehicle is traveling. Furthermore, depending on the vehicle, even if it has a wireless communication function, it does not always mean that it is in a standby state, and it is assumed that connection to the network between the vehicles is refused. Patent Document 1 is based on the premise that the position between vehicles is known in advance, and does not suggest any solution to the above-described problem.
[0009]
The present invention solves the above-mentioned problems of the prior art, and provides an in-vehicle electronic device capable of performing wireless communication between vehicles even when the position of a partner vehicle is initially unknown and a wireless communication method using the same. The purpose is to:
Further, another object of the present invention is to provide a navigation device having excellent convenience of the wireless communication function.
[0010]
[Means for Solving the Problems]
According to the present invention, an in-vehicle electronic device capable of wireless data communication between vehicles includes a navigation unit having a function of searching for a route to a destination and a first unit capable of wireless communication via a public wireless line. Wireless communication means, second wireless communication means capable of wireless communication between vehicles, and when the first wireless communication means is wirelessly connected to the other vehicle, the position information of the other vehicle is transmitted to the other vehicle. And a communication control means for enabling the second wireless communication means to perform wireless communication with the other vehicle based on the position information from the position information obtaining means. Thus, even if the position of the opponent vehicle is not known at first, the wireless communication connection between the vehicles can be easily established by acquiring the position information of the opponent vehicle via the public wireless line. The wireless communication using the public wireless line is wireless communication performed by using a wireless communication facility or service by a mobile phone, a personal digital assistant (PDA), or a personal computer, for example. On the other hand, wireless communication between vehicles is wireless communication performed using a wireless communication terminal mounted on the vehicle.
[0011]
Further, a wireless communication method in a vehicle-mounted electronic device according to the present invention includes the following steps. Performing wireless communication with the opponent vehicle via a public wireless line, obtaining position information of the opponent vehicle from the opponent vehicle, and performing wireless communication between the opponent vehicles based on the position information. And establishing.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing functions of the vehicle-mounted electronic device according to the present embodiment. The in-vehicle electronic device 100 includes a navigation function 110, an audio function 120, and a wireless communication function 130. However, this is only an example, and is not necessarily limited to an electronic device including such a function. Further, the on-vehicle electronic device may be a navigation device including the audio function 120 and the wireless communication function 130, or may be an audio device including the navigation function 110 and the wireless communication function 130, or An electronic device set or an electronic device system in which an audio device and a wireless communication device are interconnected may be used. The in-vehicle electronic device according to the present invention may be an integrated device or another device as long as it has at least a navigation function and a wireless communication function.
[0013]
The wireless communication function 130 illustrated in FIG. 1 has a wireless communication function of performing wireless communication using a public wireless line and a wireless communication function between vehicles that does not use a public wireless line. The public wireless line is wireless communication using an existing communication infrastructure such as a base station, and is performed by, for example, a mobile phone or a personal digital assistant (PDA). The in-vehicle electronic device 100 may be configured to externally connect a mobile phone or the like, or may include such a communication module. Further, the on-vehicle electronic device 100 has a wireless communication terminal for performing wireless communication between vehicles. The wireless communication terminal may be configured to be externally connected to the in-vehicle electronic device 100, or may have such a function.
[0014]
FIG. 2 is a conceptual diagram illustrating a communication example performed by the wireless communication function 130. FIG. 1A shows an example in which vehicle A and vehicle B are performing data communication with each other via a base station via a public wireless line. FIG. 1B shows an example in which the vehicle A and the vehicle B perform data communication with each other via a wireless communication terminal mounted on the vehicle A, without using the public wireless line. FIG. 1C shows an example in which a vehicle A and a vehicle B perform data communication with each other via a vehicle-to-vehicle local area network (LAN) formed therebetween. 2 (b) and 2 (c), each of the vehicles A and B includes a wireless communication terminal, and in the case of FIG. 2 (c), a plurality of vehicles constituting the inter-vehicle LAN are wireless communication terminals. It has.
[0015]
According to the present invention, when wireless communication is performed between a specific vehicle (hereinafter, referred to as an opponent vehicle) and the vehicle, in order to acquire position information of the opponent vehicle, the opponent vehicle is connected via a public wireless line as shown in FIG. Then, wireless communication is performed between the vehicles as shown in FIG. 2B or FIG. 2C by acquiring the position information of the other vehicle from the other vehicle.
[0016]
FIG. 3 is a block diagram illustrating a configuration when the functions included in the vehicle-mounted electronic device 100 are realized by the navigation device. That is, the navigation device 1 has the navigation function 110, the audio function 120, and the wireless communication function 130. In FIG. 1, a navigation device 1 stores a GPS receiver 10, a self-contained navigation sensor 11, a VICS / FM multiplex receiver 12, an operation panel 20, a voice input unit 21, a remote control operation unit 22, an input interface 23, map data, and the like. It includes a storage device 30, a sound output unit 40, a speaker 41, a display control unit 50, a display 51, a program memory 60, a data memory 70, and a control unit 80 for controlling each unit.
[0017]
The GPS receiver 10 receives a radio wave from an artificial satellite (GPS satellite) and measures the current position and current direction of the vehicle. The measured position information includes data on the latitude, longitude, and altitude of the vehicle. The self-contained navigation sensor 11 includes a vehicle speed sensor for detecting a moving distance of the vehicle and an angle for detecting a rotation angle of the vehicle. Output signals of the GPS receiver 10 and the self-contained navigation sensor 11 are supplied to a control unit 80, and the control unit 80 calculates the current position and direction of the vehicle based on these output signals.
[0018]
The VICS / FM multiplex receiver 12 sequentially receives current road traffic information outside the vehicle via the antenna 13. VICS provides road traffic information in real time, and transmits information by FM multiplexing (text broadcasting), radio wave beacons, and optical beacons. FM multiplexing covers road traffic information in a wide area. The radio beacon and the optical beacon have road traffic information in an area having a radius of about 10 km from the center thereof, and can receive information when the vehicle passes through the beacon. The data transmitted from the VICS includes the level of traffic congestion, for example, smoothness, congestion, traffic congestion, traffic congestion distance, traffic regulation, travel time, etc., for the link corresponding to each road.
[0019]
The operation panel 20, the voice input unit 21, and the remote control operation unit 22 constitute an input of the navigation device 1. The user gives various instructions and settings to the navigation device 1 via these inputs, such as searching for the destination, searching for a route to the destination, and changing the settings of the display screen. The operation panel 20 can use, for example, a plurality of operation keys 52 provided below the display 51. Further, input can be performed by touching the display 51. The voice input unit 21 transmits a user's voice input from a voice input microphone (not shown) to the input interface 23, and converts a voice analog signal into a digital signal. The remote control operation unit 22 includes a plurality of input keys. When the user operates the input keys, the input operation is transmitted to the input interface 23 through wireless communication. The input interface 23 is connected to the operation panel 20, the voice input unit 21, and the remote control operation unit 22, and transmits input information input by a user to the control unit 80.
[0020]
The storage device 30 is a recording medium such as a hard disk (HDD), a DVD, and a CD-ROM, and stores map data, addresses, telephones, facilities, and other databases and music data required for the navigation device. The recording device 30 preferably uses a hard disk, which enables data to be rewritten when updating the database. Further, the storage device 30 can store programs for executing various functions of the navigation device.
[0021]
The data communication control unit 31 executes the wireless communication function 130 described above. The data communication control unit 31 may have a built-in communication module for transmitting and receiving data via a public wireless line by a mobile phone or a personal digital assistant (PDA), or may be configured to externally connect such a communication device. It may be connected. Further, the data communication control unit 31 includes a wireless communication terminal for performing wireless communication between vehicles. The wireless communication terminal may be built in the data communication control unit 31, or may be a device separately connected to the outside.
[0022]
The wireless communication between the vehicles uses, for example, wireless communication data 32 in a format as shown in FIG. In the figure, idling data is a synchronization signal for stably communicating wireless communication data. The ID is identification data for identifying a wireless communication terminal mounted on a vehicle, and is uniquely assigned to each wireless communication terminal. The vehicle position is data relating to the current position of the vehicle. The own vehicle position is calculated based on the data received from the GPS receiver 10 as described above. The traveling direction is data relating to the traveling direction of the vehicle, and can be calculated by monitoring a change in the position of the own vehicle. The network code is data for identifying a network formed between vehicles. For example, an identification code according to a congestion network, an emergency network, or the like is provided. Further, although not shown here, option data can be added as information necessary for the network. For example, it can include vehicle sensor information (airbag open) and accident situation information (accident level). The wireless communication terminal equipped with the wireless communication function 130 (data communication control unit 31) between the vehicles always performs wireless communication and searches for a vehicle equipped with another wireless communication terminal. Then, when the wireless communication data 32 including the ID is received, a network is formed with the other party.
[0023]
The data communication control unit 31 connects to the Internet using such a wireless communication function 130, for example, receives data related to road traffic information from a traffic information center, or obtains the latest road, map data, Facility data, the latest music data, and the like can be downloaded, and the contents of the storage device (hard disk) 30 can be updated. The data communication control unit 31 can also provide entertainment information and road traffic information such as facilities and restaurants held by the navigation device 1 to a mobile phone or the like.
[0024]
The audio output unit 40 includes a speaker 41, and outputs sound from the speaker 41 under the control of the control unit 80. For example, a sound that prompts the driver to pay attention to the course direction before the intersection is output as information until the user reaches the destination, or an operation input to the user is performed when the user performs an interactive input to the navigation device. Output a voice instruction. Further, the audio output unit 40 outputs music when the navigation device performs an audio function.
[0025]
The display control unit 50 is connected to the display 51, and displays a map on the display 51 based on data read from the storage device 30 or the data memory 70 under the control of the control unit 80, or displays a map on the map. A vehicle mark indicating the current position of the vehicle, a route to a destination, a guidance display at a branch point such as an intersection, and a movement locus of the vehicle are combined. Further, information on an instruction or operation input by the user from the operation panel 20 or the like is displayed on a map or on another screen. The display control unit 50 preferably includes a VRAM such as a FIFO, stores data relating to a map, a road, and a guidance display read from the storage device 30 or the data memory 70 in the VRAM, and stores the data in the map data read from the VRAM. Synthesize various data. The display 51 is, for example, a horizontally long wide screen using liquid crystal or plasma, and can display two screens under the control of the display control unit 50.
[0026]
The program memory 60 stores various programs executed in the navigation device, and these programs are executed by the control unit 80. The program memory 60 may be configured using, for example, a rewritable RAM, and may read out a program stored in the storage device 30. Alternatively, a ROM in which a program is stored in advance can be used. The contents of the program include, for example, a program 61 for searching for a route to a destination, a program 62 for setting and changing a map displayed on the display 51, and the like. Further, the present invention includes a wireless communication control program 63 for acquiring position information of a partner vehicle and performing wireless communication between the partner vehicle when a wireless connection is made through a public wireless line. This operation will be described later.
[0027]
The data memory 70 stores processing results of various operations processed by the control unit 80, map data 71 read from the storage device 30, and the like. Further, the data memory 70 stores the searched guidance route data 72 and the road traffic information 73 received from the VICS / FM multiplex receiver 12 when the control unit 80 performs the route search processing to the destination vehicle. Is stored. Further, the data memory 70 stores position information 74 obtained from a partner vehicle wirelessly connected by a public wireless line, or stores wireless communication data 32 from vehicles forming an inter-vehicle network. As the data memory 70, a DRAM, an SRAM, a flash memory, or the like can be used, but preferably, a nonvolatile memory is used, and the stored contents can be stored even when the power of the navigation device is turned off. . Further, an external memory 75 that can be mounted on the navigation device 1 may be used in combination with the data memory 70.
[0028]
Next, a wireless communication operation between vehicles in the navigation device according to the present embodiment will be described with reference to a flowchart of FIG. An instruction to perform wireless communication between vehicles is input from a user (step S101). The input is performed via the operation panel 20, the voice input unit 21, or the remote controller 22. When receiving the input of the wireless communication, the control unit 80 starts controlling the wireless communication according to the wireless communication control program 63.
[0029]
As shown in FIG. 6, the control unit 80 causes the display 51 to display an input waiting screen as to whether or not the position of the partner vehicle with which wireless communication between the vehicles is to be performed is known (step S102). Furthermore, a plurality of vehicle marks 53 forming a vehicle-to-vehicle network and having a wireless communication function between vehicles are displayed on the display 51 centering on the vehicle position mark 52. When the user recognizes the position of the opponent vehicle, for example, when the preceding vehicle traveling the same route toward the same destination is the opponent vehicle, for example, the vehicle on the display The opponent vehicle is specified by directly touching or using the operation panel 20. If the vehicle constitutes an inter-vehicle network, the position of the partner vehicle is known, so that the vehicle can perform wireless communication with the partner vehicle.
[0030]
When the position of the opponent vehicle is not known, the opponent vehicle is accessed using a public wireless line such as a mobile phone (step S103). It is assumed that the partner vehicle has a wireless communication terminal having a wireless communication function using a public wireless line and a wireless communication function between vehicles. When making a call with a mobile phone, for example, the phone number can be searched from a database of phone numbers stored in the storage device 30. When the line is connected to the partner vehicle by a mobile phone or the like (step S104), under the control of the control unit 80, the communication control unit 31 requests the partner vehicle to transmit position information of the partner vehicle. In response to this transmission request, the other vehicle transmits position information including the position (latitude and longitude) and the traveling direction of the vehicle specified by the GPS receiver or the like.
[0031]
When receiving the position information from the opponent vehicle (step S106), the control unit 80 stores the position information in the data memory 70 and transmits the position information of the own vehicle to the opponent vehicle. Next, the control unit 80 determines whether or not the other vehicle is in a wireless communication area around the position of the own vehicle based on the position information from the other vehicle (step S107). The wireless communicable area is indicated by, for example, a dashed circle 54 in FIG. When determining that the partner vehicle is located in the wireless communication available area, the control unit 80 creates wireless communication data 32 including the ID, the own vehicle position, and the like, and transmits the wireless communication data 32 to the partner vehicle via the communication control unit 31.
[0032]
On the other hand, when it is determined that the other vehicle is not located within the wireless communication area from the own vehicle position, the control unit 80 searches for a route from the own vehicle position to the other vehicle position based on the position information of the other vehicle ( (Step S108), and transmits the wireless communication data 32 to the other vehicle via the inter-vehicle LAN formed by the vehicles capable of wireless communication on the route (Step S109). FIG. 7 shows a conceptual diagram thereof. It is assumed that vehicles C1, C2, C3, C4, C5, and C6 that enable wireless communication between vehicles exist on a route 56 from the own vehicle 52 to the partner vehicle 55. The vehicle-to-vehicle LAN 1 indicates a wireless communicable area around the vehicle C2, the vehicle-to-vehicle LAN2 indicates a wireless communicable area around the vehicle C4, and the vehicle-to-vehicle LAN 3 allows wireless communication around the vehicle C6. The area is shown. The wireless communication data 32 from the own vehicle 52 is transmitted to the other vehicle 55 via the vehicles C1 to C6 of the inter-vehicle LAN1, LAN2, and LAN3.
[0033]
The partner vehicle receives the wireless communication data 32 and can identify the source of the wireless communication data 32 from the ID data and the position information. The other vehicle returns acknowledgment data indicating that the wireless communication data 32 has been received. When the wireless communication with the partner vehicle is thus established (step S110), the public wireless line such as a mobile phone is disconnected (step S111), and the connection is switched to the wireless communication between the vehicles (step S112).
[0034]
As described above, in the present embodiment, when performing wireless communication between vehicles, if the position of the opponent vehicle is not known, the position information of the opponent vehicle is acquired via the public wireless line, and this acquisition is performed. Since the wireless communication between the vehicles is performed based on the information, the convenience of the procedure for performing the wireless communication with the specific vehicle is further improved.
[0035]
Next, the operation according to the second embodiment will be described with reference to the flowchart in FIG. In the second embodiment, communication is performed in a data type according to a distance from a partner vehicle. As shown in step S112 of FIG. 5, after the wireless communication between the vehicles is connected (step S201), the control unit 80 calculates a road distance from the own vehicle position to the partner vehicle position (step S202). . It is determined whether or not the road distance is larger than a certain value N (step S203). If it is smaller than the certain value N, short-distance data communication is enabled (step S204). When it is determined that the value is larger than the predetermined value N, data communication for a long distance is enabled (step S205). For example, as shown in FIG. 9, in the case of long-distance data communication, communication with a relatively small data capacity such as mail or chat is performed. In the case of short-distance data communication, in addition to mail and chat, communication with a large data capacity such as image distribution, TV telephone, and moving image distribution is also possible. The reason for distinguishing the data that can be communicated in accordance with the distance in this way is to prevent the longer the communication distance is, the longer the distribution time of a moving image or a telephone having a large data capacity is, and that the real-time property is not impaired.
[0036]
In addition, since the own vehicle and the other vehicle move together, it is desirable to update the road distance as needed. Therefore, when the wireless communication between the vehicles is continued, the road distance to the opponent vehicle is calculated at a constant cycle (step S206). In the present embodiment, the road distance is classified into two stages, and the wireless communication is performed according to the data type according to the two stages. However, the present invention is not limited to this. Data to be transmitted may be distinguished according to the multi-step distance. In this case, an upper limit may be set for the data capacity that can be transmitted not only for the type of data but also for each distance in multiple stages.
[0037]
Next, a third embodiment of the present invention will be described with reference to FIG. After the wireless communication between the vehicles is started in step 112 shown in FIG. 5 (step S301), if the wireless communication between the vehicles is disconnected due to the movement of the other vehicle or the own vehicle (step S302), the control unit 80 Then, in order to restore the wireless communication with the opponent vehicle, the call to the opponent vehicle is made again by a public wireless line such as a mobile phone (step S303). Thereby, the wireless communication is connected between the own vehicle and the other vehicle (step S304). If switching to wireless communication between vehicles is performed, the operation after step S104 in FIG. 5 is performed.
[0038]
In the third embodiment, an example has been described in which wireless communication is restarted by a public wireless line after wireless communication with a partner vehicle is disconnected. However, the present invention is not limited to this, and wireless communication between vehicles is disconnected. When there is a risk, the wireless communication via the public wireless line may be restarted. For example, on the route from the own vehicle to the other vehicle, when the number of vehicles having the wireless communication function between the vehicles decreases or when the traveling direction of the other vehicle may deviate from the inter-vehicle LAN, It may be determined that the wireless communication is disconnected, and a wireless connection via a public telephone line may be made at that time. Then, it is possible to prevent a blank period in which the wireless communication is cut off.
[0039]
As described above, the preferred embodiments of the present invention have been described in detail. However, the present invention is not limited to the specific embodiments, and various modifications may be made within the scope of the present invention described in the appended claims. Deformation and modification are possible.
[0040]
【The invention's effect】
According to the present invention, position information is acquired from a partner vehicle connected by a public wireless line such as a mobile phone, and wireless communication between the partner vehicle and the vehicle is performed based on the position information. Even when the position is not known at first, a wireless communication connection between the vehicles can be established. Further, by performing wireless communication with a data type corresponding to the distance to the opponent vehicle, it is possible to transmit and receive data with a small time lag and real time. Therefore, the convenience of the in-vehicle electronic device can be further improved.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a vehicle-mounted electronic device according to an embodiment of the present invention.
FIGS. 2A and 2B show an example of wireless communication using an in-vehicle electronic device. FIG. 2A shows an example of wireless communication using public wireless communication, FIG. 2B shows an example of wireless communication between vehicles, and FIG. It is a figure which shows the example of wireless communication via the local area network between vehicles.
FIG. 3 is a block diagram showing a configuration of a navigation device according to the embodiment of the present invention.
FIG. 4 is a diagram showing a format of wireless communication data.
FIG. 5 is a flowchart illustrating a wireless communication operation according to the present embodiment.
FIG. 6 is a diagram showing a display example of a vehicle capable of wireless communication between vehicles.
FIG. 7 is a diagram illustrating an example of performing wireless communication with a partner vehicle via a vehicle-to-vehicle LAN.
FIG. 8 is a flowchart showing an operation according to the second embodiment.
FIG. 9 is a diagram showing data types of short-distance data communication and long-distance data communication.
FIG. 10 is a flowchart showing an operation according to the third embodiment.
[Explanation of symbols]
1: navigation device, 10: GPS receiver, 11: self-contained navigation sensor,
12: VICS / FM multiplex receiver, 20: operation panel, 21: voice input unit,
22: remote controller, 23: input IF, 30: storage unit, 31: communication control unit,
40: audio output unit, 41: speaker, 50: display control unit, 51: display,
52: own vehicle position mark, 53: vehicle mark, 54: wireless communicable area,
55: partner vehicle, 60: program memory, 70: data memory,
75: external memory, 80: control unit

Claims (9)

An in-vehicle electronic device capable of wireless data communication between vehicles,
Navigation means with the ability to find a route to the destination,
First wireless communication means capable of wireless communication via a public wireless line;
Second wireless communication means capable of wireless communication between vehicles;
Position information acquisition means for acquiring position information of the other vehicle from the other vehicle when wirelessly connected to the other vehicle by the first wireless communication means;
Communication control means for enabling wireless communication with the other vehicle by the second wireless communication means based on the position information from the position information acquisition means;
An in-vehicle electronic device having: The in-vehicle electronic device according to claim 1, wherein the communication control unit disconnects the wireless communication by the first wireless communication unit when the second wireless communication unit establishes wireless communication with the other vehicle. The communication control means causes the navigation means to search for a route from the position of the own vehicle to the position of the opponent vehicle, and the communication control means, via a local area network formed with a vehicle located on the route. The on-vehicle electronic device according to claim 1 or 2, wherein the on-vehicle electronic device enables wireless communication with a vehicle. The communication control unit, when determining that the wireless communication with the partner vehicle by the second wireless communication unit is disconnected, enables wireless communication with the partner vehicle by the first wireless communication unit. The in-vehicle electronic device according to claim 1, 2, or 3. The in-vehicle electronic device according to claim 1, wherein the communication control unit calculates a distance from a position of the own vehicle to a position of the partner vehicle, and performs wireless communication based on a data type corresponding to the distance. A wireless communication method in an in-vehicle electronic device having at least a navigation function and a wireless communication function,
Performing wireless communication with the other vehicle via a public wireless line;
Acquiring position information of the other vehicle from the other vehicle,
Establishing wireless communication between the vehicles with the other vehicle based on the position information,
A wireless communication method for an in-vehicle electronic device, comprising: The wireless communication method for an in-vehicle electronic device according to claim 6, further comprising a step of disconnecting wireless communication via a public wireless line after wireless communication between the vehicles is established. The wireless communication method for an in-vehicle electronic device according to claim 7, further comprising a step of performing wireless connection by a public wireless line when it is determined that the wireless communication between the vehicles is disconnected. The step of establishing wireless communication between the vehicles includes the step of searching for a route from the own vehicle position to the position of the opponent vehicle by the navigation function, and a local area formed between the vehicle located on the searched route. The wireless communication method according to claim 6, further comprising a step of performing wireless communication with the partner vehicle via a network.

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