JP2010199717A - In-vehicle device and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and accurately receive large-capacity data from a server device by effectively utilizing an external radio communication function of a plurality of mobile terminal devices in a vehicle cabin. <P>SOLUTION: The in-vehicle device 100 issues a request obtain data of images and sound, etc., stored in a home server 400 to a GW 200. The GW 200 obtains the data from the home server 400 through a mobile telephone terminal device 300a and/or a mobile telephone terminal device 300b. The home server 400 divides and transmits the data for each mobile telephone terminal device 300 which has relayed a data request. Each mobile telephone terminal device 300 transmits the reception data from the home server 400 to the GW 200. The GW 200 confirms that all the data divided and received for each mobile telephone terminal device 300 are normally received and connects the division data to restore the data. The in-vehicle device 100 outputs the images and the sound based on the restored data from an image display and a speaker, etc. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-vehicle device and a communication system that acquire data from an external server device by wireless communication via a portable terminal device brought into a vehicle cabin.

  In recent years, car navigation systems have become widespread, and it has become common for automobiles to be equipped with in-vehicle devices capable of viewing music and video, displaying navigation information, and the like. Such an in-vehicle device can communicate with a mobile terminal device such as a mobile phone or a PDA (Personal Digital Assistant) carried by a passenger and perform data transmission / reception between the in-vehicle device and the mobile terminal device. It is coming.

  As a communication method for performing short-range wireless communication between communicable devices, for example, a wireless communication standard called Bluetooth (registered trademark, hereinafter the same) is well known. Bluetooth is a wireless communication standard using a frequency band of 2.4 GHz, and wireless communication within a radius of several tens of meters is possible.

  By the way, with the spread of mobile terminal devices, a plurality of mobile terminal devices are often brought into the vehicle cabin. As described above, various services can be enjoyed by transmitting and receiving data between the in-vehicle device and the portable terminal device in the vehicle interior.

JP 2002-296045 A Japanese Patent Laid-Open No. 9-274697 JP 2003-256896 A JP 2003-298773 A

  In recent years, data distribution technology for distributing large-capacity data such as contents in response to requests has become widespread. In such a technology, a data distribution company distributes data stored in a server device, or an individual has a dedicated server device, and distributes data from its own server device to a mobile terminal device as necessary. Applied to do.

  Under such circumstances, in the related art represented by the above, since the data transmission speed of the packet communication function of the mobile terminal device is low, a large amount of data (for example, from the server device via the packet communication function of the mobile terminal device) , Moving image data, etc.) and collecting them in the in-vehicle device is extremely difficult from the viewpoint of the communication speed of the packet communication function by the mobile terminal device. For example, when a large amount of data is received using the packet communication function of one mobile terminal device, frames are dropped, data is lost, etc., and a huge amount of time is required for data reception.

  The in-vehicle device and the communication system of the disclosure are made to solve the above problems (issues), and effectively utilize the external wireless communication function of a plurality of portable terminal devices brought into the vehicle interior of the vehicle. Thus, an object of the present invention is to improve the processing speed for efficiently and accurately receiving large-capacity data from a server device and consolidating it on a vehicle-mounted device.

  In order to solve the above-described problems and achieve the object, the in-vehicle device and the communication system disclosed in the above-mentioned in-vehicle device perform wireless communication with a plurality of portable terminal devices in a vehicle interior of the vehicle, A radio wave receiving device provided in a vehicle for requesting a data transmission request to a mobile terminal device to an external server device and dividing and transmitting data from the external server device to each mobile terminal device based on the request The obtained divided data is combined, the combined data is displayed on the display unit, and the external server device sends a data transmission request from the in-vehicle device via wireless communication by a plurality of portable terminal devices. Accordingly, it is a requirement that data is read from the data storage unit in response to the data and divided and transmitted for each of the plurality of portable terminal devices.

  According to the in-vehicle device and the communication system of the disclosure, the external wireless communication function of a plurality of portable terminal devices brought into the vehicle interior of the vehicle is effectively used to efficiently and quickly receive large-capacity data from the server device. The output device connected to the in-vehicle device can be output.

FIG. 1 is a diagram for explaining an overview of a communication system according to an example of an embodiment. FIG. 2 is a diagram for explaining the arrangement positions of the devices provided in the vehicle. FIG. 3 is a functional block diagram illustrating a configuration of each device included in the communication system according to an example of the embodiment. FIG. 4 is a diagram illustrating an example of a connection state management table. FIG. 5 is a diagram illustrating an example of the request management information table. FIG. 6 is a sequence diagram illustrating data communication processing executed in the communication system according to an example of the embodiment.

  Exemplary embodiments of a disclosed on-vehicle apparatus and communication system will be described in detail below with reference to the accompanying drawings. Note that a gateway device (hereinafter abbreviated as GW) shown in an example of the following embodiment will be described as a separate device from the in-vehicle device. However, the present invention is not limited to this and may be included in the in-vehicle device. In addition, since GW is also a vehicle-mounted device, it is a kind of vehicle-mounted device.

  Moreover, the external server apparatus shown in an example of the following embodiment will be described using a home server as an example. A home server provides data and services to information devices connected to a home communication network, and stores image data and / or audio data, etc., and stores information devices connected to the home communication network. This is a server device having a function to control. However, the present invention is not limited to this, and it may be a content server device in which a content distribution company stores content and distributes the content for a fee or free of charge.

  In the example of the following embodiment, a case where the mobile phone terminal device 300 is used as a mobile terminal device will be described. However, a portable terminal device such as a PDA (Personal Digital Assistant) or a portable computer may be used. Good. In addition, although an example of embodiment demonstrates the case where the communication apparatus which performs short-distance wireless communication with a portable terminal device is a vehicle-mounted apparatus mounted in a vehicle, it is an electronic apparatus capable of a communication apparatus installed indoors or the like. There may be.

  In the example of the following embodiment, the wireless communication method will be described by taking Bluetooth communication as an example. However, other wireless communication methods such as infrared communication, Wi-Fi (registered trademark), and Wi-MAX (registered trademark) are used. There may be. In the attached drawings, the description that “Bluetooth” is a registered trademark is omitted.

  First, an overview of a communication system according to an example embodiment will be described with reference to FIG. As shown in the figure, a communication system S according to an example of an embodiment includes an in-vehicle device 100 and a GW 200 mounted on a vehicle 1, a mobile phone terminal device 300 a and a mobile phone terminal device brought into the vehicle interior of the vehicle 1. 300 b (hereinafter collectively referred to as a mobile phone terminal device 300), a carrier A and a carrier B that are communication networks of carrier operators of each mobile phone terminal device 300, and a home server 400.

  The in-vehicle device 100 requests the GW 200 to acquire data such as images and sounds stored in the home server 400. The GW 200 acquires data from the home server 400 to the mobile phone terminal device 300a and / or the mobile phone terminal device 300b that is not used by the mobile owner or is in a packet communication enabled state via Bluetooth communication. Ask. Then, the GW 200 accesses the home server 400 via the carrier A of the mobile phone terminal device 300a and / or the carrier B of the mobile phone terminal device 300b, and acquires the requested data.

  Home server 400 divides and transmits data for each mobile phone terminal device 300 that relays the data request. The data received by being divided for each mobile phone terminal device 300 is transmitted from each mobile phone terminal device 300 to the GW 200 by Bluetooth communication. The GW 200 restores the data by confirming that all the data divided and received for each mobile phone terminal device 300 has been normally received and combining the divided data. The in-vehicle device 100 outputs an image or sound based on the restored data from an image display device, a speaker, or the like.

  As described above, data can be acquired from the home server 400 using the external communication functions of a plurality of mobile terminal devices, so that data can be stored using the external communication function of one mobile terminal device. Data can be acquired at a higher speed than acquisition. In particular, when the data is large-capacity data, the effect is remarkable.

  Next, with reference to FIG. 2, the arrangement position of each device provided in the inside of the vehicle 1 will be described. As shown in the figure, an in-vehicle device 100 and a GW 200 are communicably connected to the front outer side of the passenger compartment of the vehicle 1. In the four corners of the passenger compartment, BT (abbreviated form of Bluetooth, the same applies hereinafter), antenna FL (Front-Left, front left, the same applies hereinafter), FR (Front-Right, front right, the same applies hereinafter), BL (Back- Left, rear left, and so on) or BR (Back-Right, rear right, so on) are arranged as shown and connected to the GW 200.

  The BT antennas FL, FR, BL, and BR communicate with the mobile phone terminal device 300a and the mobile phone terminal device 300b brought into the vehicle compartment via Bluetooth communication. When there are a plurality of mobile phone terminal devices 300 brought into the passenger compartment, the GW 200 uses a BT antenna FL, FR, BL, or BR that can perform communication with radio waves having a maximum output (or an output equal to or greater than a predetermined threshold). Select and communicate with the mobile phone terminal device 300.

  In addition, the mobile phone terminal device 300a and the mobile phone terminal device 300b have external communication functions (for example, DUN (Dial-up Networking Profile, dial-up service), packet communication function, etc.) and are installed in the vicinity. Data is transmitted to and received from the home server 400 via a telephone base station (not shown).

  Note that by selecting the BT antennas FL, FR, BL, and BR that can communicate with the GW 200 with radio waves having a maximum output (or an output equal to or higher than a predetermined threshold), for example, a BT antenna as shown in FIG. With this arrangement, it is possible to specify the position of the mobile phone terminal device 300.

  In FIG. 2, the seat provided with the steering wheel h is a driver's seat. Therefore, the mobile phone terminal device 300 that communicates with the BT antenna FR is identified as the mobile phone terminal device 300 possessed by the driver by specifying the position. The same applies to the driver's seat and the left and right rear seats.

  The arrangement positions of the in-vehicle device 100, the GW 200, the steering wheel h, the BT antennas FL, FR, BL, and BR are not limited to those illustrated in FIG. In particular, the arrangement position and the number of arrangements of the BT antenna can be changed so as to be able to communicate with the mobile phone terminal device 300 brought into the vehicle interior in an optimal radio wave condition. Further, the number of mobile phone terminal devices 300 is not limited to two, ie, the mobile phone terminal device 300a and the mobile phone terminal device 300b.

  Next, the configuration of each device included in the communication system S according to an example of the embodiment will be described with reference to FIG. As shown in the figure, the communication system S includes an in-vehicle device 100, a GW 200, a mobile phone terminal device 300a and a mobile phone terminal device 300b, and a home server 400.

  The in-vehicle device 100 acquires corresponding data from the home server 400 via the GW 200 and the mobile phone terminal device 300a and / or the mobile phone terminal device 300b in response to the data acquisition request input from the input unit 101a. This is an apparatus for controlling display of an image or sound based on data on the output unit 101b. The in-vehicle device 100 includes a control unit 101 that is a control device such as a microcomputer, and a storage unit 102 that temporarily stores data acquired from the home server 400.

  In response to the data acquisition request input from the input unit 101a, the control unit 101 acquires the corresponding data from the home server 400 to the GW 200 via the mobile phone terminal device 300a and / or the mobile phone terminal device 300b. Request. Then, the control unit 101 temporarily stores the data acquired from the home server 400 in the storage unit 102. When a data reproduction request is input from the input unit 101a, the corresponding data is read from the storage unit 102, and an image or sound based on the read data is displayed on the output unit 101b.

  The GW 200 includes a control unit 201, a connection state management unit 202, and a Bluetooth communication control unit 203. The control unit 201 is a control device such as a microcomputer, and includes a BT terminal detection unit 201a, a BT connection arbitration unit 201b, and a reception data combination unit 201c as components related to an example of the embodiment.

  While the in-vehicle device 100 is activated, the BT terminal detection unit 201a continuously detects the mobile phone terminal device 300 capable of Bluetooth communication and detects the identification information of the mobile phone terminal device 300 and the mobile phone terminal device 300. Specify the position in the car (seat position). And the information regarding the service (owned service) which can be used in the mobile phone terminal device 300 and the service (used service) which is being used is acquired from the detected mobile phone terminal device 300.

  The BT terminal detection unit 201a stores the detected identification information of the mobile phone terminal device 300, the position in the vehicle, the information on the owned service, and the information on the used service in the connection state management table illustrated in FIG. The connection state management table is a table managed by the connection state management unit 202. According to the connection state management table of FIG. 4, the in-vehicle position of the mobile phone terminal device 300 identified by the identification information “a” is FL. The owned service is A2DP (Advanced Audio Distribution Profile), HFP (Hands-Free Profile), DUN, and the service used is DUN.

  The BT connection arbitration unit 201b uses any mobile phone among the mobile phone terminal devices 300 detected by the BT terminal detection unit 201a based on the information stored in the connection state management table managed by the connection state management unit 202. Whether or not the terminal device 300 has a service (for example, DUN) that can communicate with the GW 200, and the service that can communicate with the GW 200 is not used and can be used for communication with the home server 400 Determine.

  Then, the BT connection arbitration unit 201b selects the mobile phone terminal device 300 based on the determination result, and causes the selected mobile phone terminal device 300 to communicate with the home server 400 to acquire data. The BT connection arbitration unit 201b arbitrates so that the correspondence between the mobile phone terminal device 300 and the BT antenna is 1: 1, and avoids radio wave interference in Bluetooth communication.

  The reception data combining unit 201c performs processing for combining the received divided data divided from the home server 400 via the plurality of mobile phone terminal devices 300 and restoring the data before the division. Then, the data restored by the combination is transferred to the in-vehicle device 100.

  The Bluetooth communication control unit 203 controls Bluetooth communication performed with the mobile phone terminal device 300 brought into the vehicle interior of the vehicle 1 via the BT antennas FR, FL, BR, and BL.

  The mobile phone terminal device 300 (the mobile phone terminal device 300a and the mobile phone terminal device 300b) includes a Bluetooth communication control unit 300a1 or a Bluetooth communication control unit 300a2 that controls communication with the GW 200 by executing the same dedicated application installed in advance. Have In the illustration of FIG. 3, the mobile phone terminal device 300a has a Bluetooth communication control unit 300a1, and the mobile phone terminal device 300b has a Bluetooth communication control unit 300b1.

  The home server 400 includes a mobile phone terminal device data link unit 401, a file data management unit 402a, a request management unit 402b, a data transmission state monitoring control unit 403, and a communication interface unit 404.

  The mobile phone terminal device data link unit 401 receives a data transmission request from the GW 200 via the mobile phone terminal device 300. Then, corresponding data is read from the file data management unit 402a in response to the data transmission request, and the data is transmitted to the GW 200 via the mobile phone terminal device 300 that relayed the data transmission request.

  At this time, the cellular phone terminal device data link unit 401 refers to the request management table managed by the request management unit 402b, and the identification information of the GW 200 that has the same request source ID or is included in the request source ID. Data transmission requests that are the same and only have different time information within a predetermined time are considered to be the same data transmission request, and the transmission data divided is transmitted to each corresponding mobile phone terminal device 300.

  Whether the home server 400 is the same data transmission request even if the time at which the data transmission request reaches the home server 400 is different by including the identification information of the GW 200 and the data transmission request time in the request source ID. It can be determined whether or not. Therefore, it is possible to prevent the same data from being transmitted from the home server 400 to the same GW 200 repeatedly. Further, the requested data can be quickly delivered from the home server 400 to the GW 200 by efficiently using the communication function of each mobile phone terminal device 300.

  When transmitting data to the GW 200 via the plurality of mobile phone terminal devices 300, the mobile phone terminal device data cooperation unit 401 divides and transmits the data for each mobile phone terminal device 300. At this time, transmission control is performed based on the request management information managed by the request management unit 402b so that the same divided data is not transmitted to the plurality of mobile phone terminal devices 300.

  Also, the mobile phone terminal device data link unit 401 corresponds to the next data to be transmitted next in the series of divided data divided for each mobile phone terminal device 300 every time a data transmission request is received from the GW 200. When the data is transmitted to each mobile terminal device transmission 300 and no data transmission request is received for each divided data, the reception of the data transmission request is waited for a predetermined time. If there is no reception of a data transmission request for each divided data even after waiting for reception of a data transmission request for a certain period of time, data transmission to the GW 200 is stopped.

  Note that the mobile phone terminal device data cooperation unit 401 does not wait for the reception of the data transmission request for a certain period of time when there is no reception of the data transmission request for each divided data, but the series divided for each mobile phone terminal device 300. The next data to be transmitted next among the divided data may be transmitted to the corresponding mobile terminal apparatus transmission 300 regardless of whether or not the data transmission request for each divided data from the GW 200 is received.

  In this way, even if the communication state of the mobile phone terminal device 300 temporarily becomes delayed or unstable, it may be recovered in a short time, so that communication with the corresponding mobile phone terminal device 300 is maintained. Thus, it is possible to maintain the data communication accuracy and the data communication speed.

  The file data management unit 402a stores and stores a large amount of data such as images and sounds. The request management unit 402b, for example, as illustrated in FIG. 5, the IP address and carrier identification information (carrier) of the mobile phone terminal device 300 that has relayed the data transmission request, and the identification information of the data transmission request source GW 200 ( The request management information table storing the request source ID) is managed.

  For example, when the request source ID is “ABC123”, “ABC” is the identification information of the GW 200, and “123” is the time when the GW 200 transmits the data transmission request (or the home server 400 receives the request). Time). When the request source IDs are the same, the mobile phone terminal device data linkage unit 401 regards the data transmission requests from the same GW 200 and divides the requested data for each mobile phone terminal device 300 to each mobile phone. The data is transmitted to the GW 200 via the terminal device 300.

  The data transmission state monitoring control unit 403 monitors the data transmission status to each mobile phone terminal device 300 by the mobile phone terminal device data linkage unit 401, and optimizes the transmission status. Specifically, data transmission to the mobile phone terminal device 300 in which the data transmission / reception state is unstable is stopped, and transmission is performed to another mobile phone terminal device 300 in which the data transmission / reception state is stable. In addition, the mobile phone terminal device 300 brought into the vehicle 1 detects that the mobile phone terminal device 300 that has not been used for data transmission has shifted to a state that can be used for data transmission. The telephone terminal device 300 is used for data transmission.

  By doing so, it is possible to stabilize the communication by the mobile phone terminal device 300 and improve the data communication speed by effectively using the mobile phone terminal device 300 in a state where it can be used for data transmission.

  Next, with reference to FIG. 6, the data communication process performed in the communication system S according to an example of the embodiment will be described. As shown in the figure, first, the in-vehicle device 100 requests the GW 200 to detect a mobile phone terminal device 300 that can be used to receive data from the home server 400 (step S101).

  Subsequently, the GW 200 refers to the connection state management table in response to a request for detection of the mobile phone terminal device 300 that can be used for data reception from the home server 400, which is performed by the in-vehicle device 100, and the corresponding mobile device. The telephone terminal device 300 is notified (step S102).

  Subsequently, the in-vehicle device 100 connects the home server 400 to the mobile phone terminal device 300 (the mobile phone terminal device 300a and the mobile phone terminal device 300b) that can be used to receive data from the home server 400 to the GW 200. For example, an instruction is transmitted so as to issue an instruction to establish communication using DUN (step S103).

  The GW 200 that has received the instruction in step S <b> 103, with respect to the mobile phone terminal device 300 (the mobile phone terminal device 300 a and the mobile phone terminal device 300 b) that can be used to receive data from the home server 400, An instruction is issued to establish communication using DUN (steps S104 and S105).

  In step S106, the in-vehicle device 100 and the GW 200 perform the process of step S103 every time a user download request from the home server 400 is received.

  Subsequently, the mobile phone terminal device 300a and the mobile phone terminal device 300b add the unique ID of the GW 200 (identification information of the GW 200) to the transmission parameter, and establish communication with the home server 400 (Step S107 and Step S108). .

  Subsequently, when the home server 400 establishes communication with the mobile phone terminal device 300a and the mobile phone terminal device 300b and receives a data transmission request from each mobile phone terminal device 300, the home server 400 reads the corresponding data from the file data management unit 402a, The corresponding data is ordered and divided to generate ordered divided data, and the divided data is transmitted to each mobile phone terminal device 300 (step S109, step S110 and step S111).

  Note that, when a data request is made from each mobile phone terminal device 300 to the home server 400, information to be sent from each mobile phone terminal device 300 may be aggregated and sent to one mobile phone terminal device 300.

  The mobile phone terminal device 300a and the mobile phone terminal device 300b that have received the divided data transmit the corresponding divided data to the GW 200 through Bluetooth communication (steps S112 and S113).

  The GW 200 that has received the divided data confirms that all of the divided data has been prepared, combines the divided data according to the correct data order, and restores the data before the division (step S114). Subsequently, the GW 200 transmits the restored data to the in-vehicle device 100 (step S115). Subsequently, the in-vehicle device 100 outputs an image or sound based on the data received from the GW 200 from the output unit 101b (step S116).

  According to an example of the above-described embodiment, when downloading a large amount of image or audio data from the home server 400 to the in-vehicle device 100 for viewing, the external communication function of the plurality of mobile phone terminal devices 300 brought into the vehicle 1 ( For example, the data reception speed from the home server 400 is improved using a DUN, a packet communication function, or the like.

  In addition, since arbitration control is performed so that the connection between the BT antenna and the mobile phone terminal device 300 becomes one-to-one, communication between the GW 200 and the mobile phone terminal device 300 can be performed smoothly.

  In addition, the communication state between the mobile phone terminal device 300 and the home server 400 is monitored, and the mobile phone terminal device 300 that transmits data by dynamic control is dynamically selected, so that the accuracy of large-capacity data transmission / reception is improved, and the image And drop of voice frames and data loss can be prevented.

  Although an example of the embodiment of the present invention has been described above, the present invention is not limited to this, and can be implemented in various different embodiments within the scope of the technical idea described in the claims. It may be. Moreover, the effect described in an example of embodiment is not limited to this.

  In addition, among the processes described in the example of the embodiment, all or part of the processes described as being automatically performed can be manually performed, or have been described as being manually performed. All or a part of the processing can be automatically performed by a known method. In addition, the processing procedure, the control procedure, the specific name, and information including various data and parameters shown in the exemplary embodiment can be arbitrarily changed unless otherwise specified.

  Each component of each illustrated device is functionally conceptual and does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each device is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed or arbitrarily distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured.

  Furthermore, each or all of the processing functions performed in each device are entirely or partially a CPU (Central Processing Unit) (or a microcomputer such as an MPU (Micro Processing Unit) or MCU (Micro Controller Unit)) and It may be realized by a program that is analyzed and executed by the CPU (or a microcomputer such as MPU or MCU), or may be realized as hardware by wired logic.

  According to an example of the above embodiment, the following technique is disclosed.

A detection unit that detects a mobile terminal device in a state in which communication by wireless communication is possible;
A data acquisition part acquires the data divided | segmented for every several portable terminal device from the external server apparatus by external wireless communication via the portable terminal device detected by the detection part. The vehicle-mounted apparatus characterized by the above-mentioned.

The external server device
A communication system comprising: a transmission status monitoring control unit that monitors a transmission status of data to a plurality of portable terminal devices by a data transmission unit and performs optimization control of the transmission status.

A wireless communication step of performing wireless communication with a plurality of portable terminal devices in a vehicle interior;
A data transmission request request step for requesting a data transmission request to an external server device to the plurality of portable terminal devices via the wireless communication in the wireless communication step;
Data obtained by dividing the data transmitted from the external server device for each of the plurality of portable terminal devices based on the request in the data transmission request request step via the plurality of radio wave receiving devices provided in the vehicle An acquisition step;
A data combining step of combining the divided data acquired by the data acquisition step;
The vehicle-mounted device executes a display control step for controlling display of the data combined in the data combining step on the display unit,
Data transmission that reads data from a data storage unit in response to a data transmission request from the in-vehicle device via the wireless communication by the plurality of portable terminal devices, and divides and transmits the data for each of the plurality of portable terminal devices The communication control method, wherein the external server executes the step.

DESCRIPTION OF SYMBOLS 1 Vehicle 100 In-vehicle apparatus 101 Control part 101a Input part 101b Output part 102 Storage part 200 GW
201 control unit 201a BT terminal detection unit 201b BT connection arbitration unit 201c BT reception data combination unit 202 connection state management unit 203 Bluetooth communication control unit 300, 300a, 300b mobile phone terminal device 300a1, 300b1 Bluetooth communication control unit 400 home server 401 mobile Telephone terminal device data linkage unit 402a File data management unit 402b Request management unit 403 Data transmission state monitoring control unit 404 Communication interface unit FL, FR, BL, BR BT antenna h Steering wheel S Communication system

Claims (5)

A wireless communication unit that performs wireless communication with a plurality of portable terminal devices in a vehicle interior;
A data transmission request requesting unit for requesting an external server device to send a data transmission request to the plurality of portable terminal devices via the wireless communication by the wireless communication unit;
A data acquisition unit that acquires data transmitted from the external server device after being divided for each of the plurality of mobile terminal devices based on a request from the data transmission request request unit via a radio wave receiver provided in the vehicle When,
A data combining unit that combines the divided data acquired by the data acquisition unit;
An in-vehicle apparatus, comprising: a display control unit that controls display of data combined by the data combining unit on a display unit. A plurality of antennas arranged in the vehicle interior, wherein a specific unit for identifying a corresponding position of each mobile terminal device based on electric field strength of radio waves received from a plurality of mobile terminal devices brought into the vehicle interior of the vehicle Have
The data acquisition unit is detected by the detection unit, and the plurality of mobile terminal devices from the external server device via the external wireless communication according to a corresponding position of the mobile terminal device specified by the specifying unit The in-vehicle device according to claim 1, wherein a mobile terminal device that acquires data divided every time is selected. A wireless communication unit that performs wireless communication with a plurality of portable terminal devices in a vehicle interior;
A data transmission request requesting unit for requesting an external server device to send a data transmission request to the plurality of portable terminal devices via the wireless communication by the wireless communication unit;
A data acquisition unit that acquires data transmitted from the external server device after being divided for each of the plurality of mobile terminal devices based on a request from the data transmission request request unit via a radio wave receiver provided in the vehicle When,
A data combining unit that combines the divided data acquired by the data acquisition unit;
An in-vehicle device having a display control unit that controls display of data combined by the data combining unit on a display unit;
A data storage unit for storing data;
Data that reads data from the data storage unit in response to a data transmission request from the in-vehicle device via the wireless communication by the plurality of mobile terminal devices, and divides and transmits the data for each of the plurality of mobile terminal devices An external server device having a transmission unit. The data transmission unit transmits the next data of a series of divided data divided for each portable terminal device to each corresponding portable terminal device each time a data transmission request for each divided data is received from the in-vehicle device. 4. The communication system according to claim 3, wherein, when there is no reception of a data transmission request for each divided data, the reception is waited for a predetermined time. Each of the mobile terminals corresponding to the next data of a series of divided data divided for each portable terminal device regardless of whether or not a data transmission request for each divided data is received from the in-vehicle device. The communication system according to claim 3, wherein the communication system is transmitted to a device.

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