JP2009278365A - Data communication system, on-vehicle system, and portable device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data communication system, an on-vehicle system and a portable device by which data on the on-vehicle system are transmitted to the portable device even if a user fail in the transmission/reception of the data by a short distance wireless communication. <P>SOLUTION: The data communication system 1 includes: the on-vehicle system 3; the portable device 5; and a data center 7. When the data are not transmitted to the portable device 5 by the short range radio communication, the on-vehicle system 3 transmits the data to the data center 7 by a public radio communication. When the data are not received from the on-vehicle system 3 by the short range radio communication, the portable device 5 receives the data from the data center 7 by the public radio communication. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a data communication system, an in-vehicle system, and a portable device that transmit and receive data between an in-vehicle system mounted on a vehicle and a portable device that can be carried by a user.

A data communication system that transmits and receives data between an in-vehicle system mounted on a vehicle and a portable device has been proposed (see Patent Document 1). In this data communication system, information stored in the in-vehicle system can be transmitted to the portable device by short-range wireless communication. The user can receive various services based on the data received by the portable device.
JP 2006-004180 A

  Various vehicle set value information can be considered as data transmitted from the in-vehicle system to the portable device. For example, the user stores the vehicle setting value information of a certain vehicle in the portable device, then gets on the other vehicle with the portable device, and uses the vehicle setting value information stored in the portable device. The setting in the vehicle can be easily changed.

  In this case, it is desirable that the vehicle setting value information stored in the portable device is the latest when the user leaves the original vehicle. For this purpose, immediately before the user leaves the original vehicle (when getting off or when the key is turned off). It is necessary to transmit the vehicle set value information stored in the in-vehicle system to the portable device.

  However, when the user leaves the original vehicle, if the transmission / reception of the vehicle setting value information through the short-range wireless communication fails, the vehicle setting value information stored in the portable device cannot be updated to the latest one.

  The present invention has been made in view of the above points, and a data communication system, an in-vehicle system, and a portable device that can transmit data of an in-vehicle system to a portable device even if transmission / reception of data by short-range wireless communication fails. The purpose is to provide a machine.

  (1) In the invention according to claim 1, when the in-vehicle system fails to transmit data to the portable device by the first transmission means, the data is transmitted to the data center by the second transmission means. The data center receives the data by the third receiving means and stores it in the storage means. When the portable device fails to receive data by the first receiving means, the second receiving means receives the data transmitted by the third transmitting means of the data center.

Therefore, even when data cannot be transmitted / received by short-range wireless communication between the in-vehicle system and the portable device, the data stored in the portable device can be updated to the latest one.
Further, in the data communication system of the present invention, when data can be transmitted and received by the first transmission unit of the in-vehicle system and the first reception unit of the portable device, the data stored in the portable device is updated by them. Can be updated.

  Examples of the data include vehicle seat position, car navigation settings (home position setting, route setting), radio channel selection and volume, and various vehicle customization settings performed by a dealer.

Examples of the short-range wireless communication include Bluetooth, weak radio wave communication (smart key, keyless entry), ZIGBEE, and the like.
Examples of the public wireless communication include known forms of wireless communication used in mobile phones.
(2) In the invention of claim 2, when the in-vehicle system cannot transmit data to the data center by public wireless communication, the in-vehicle system retries transmission of data to the data center by public wireless communication after a predetermined time elapses. Thereby, transmission failure of data from the in-vehicle system to the data center can be prevented.
(3) In the invention of claim 3, the in-vehicle system detects a portable device that has attempted to transmit data after having failed to transmit data by public wireless communication in the past at a position where short-range wireless communication is possible. Then, data is transmitted to the portable device by short-range wireless communication. As a result, data can be reliably transmitted to the portable device.
(4) In the invention of claim 4, when the portable device cannot receive data from the data center, it reattempts to receive data from the data center after a predetermined time has elapsed. As a result, the portable device can reliably receive data from the data center.
(5) In the invention of claim 5, when the power is turned on, the portable device determines whether there is unreceived data in the data center, and if there is unreceived data, Unreceived data is received by public wireless communication. As a result, for example, data stored in the data center during the period when the power of the portable device is OFF can be taken into the portable device at an early stage.
(6) If the vehicle-mounted system of Claim 6 is used, the data communication system in any one of Claims 1-5 is realizable.
(7) If the portable device of claim 7 is used, the data communication system according to any one of claims 1 to 5 can be realized.

Embodiments of the present invention will be described with reference to the drawings.
1. Configuration of Data Communication System 1 The overall configuration of the data communication system 1 and the configuration of the in-vehicle system 3 will be described with reference to FIG.

The data communication system 1 includes an in-vehicle system 3 mounted on a vehicle, a portable device 5 that can be carried by a vehicle occupant, and a data center 7 provided outside the vehicle.
The in-vehicle system 3 includes an in-vehicle device 9, an in-vehicle network 11, a vehicle ECU group 13, an occupant detection device 15, and a public wireless communication device (second transmission means) 17.

  The in-vehicle device 9 is a Bluetooth between a network communication device (data acquisition means) 19 that transmits and receives data to and from the in-vehicle network 11 and a short-range wireless communication device 27 (described later) mounted on the portable device 5. Controls each component of the short-range wireless communication device (first transmission means) 21 that performs short-range wireless communication according to, a storage device 23 that stores data, and the in-vehicle system 3, and transmits and receives data to and from each component Is provided with a central processing unit (on-vehicle system side control means) 25 that performs processing to be described later.

The in-vehicle network 11 connects the in-vehicle device 9, the vehicle ECU group 13, the occupant detection device 15, and the public wireless communication device 17 to enable data exchange.
The vehicle ECU group 13 controls various parts of the vehicle and transmits various set value information (seat position, navigation system setting, air conditioner setting, etc.) related to the vehicle to the in-vehicle network 11. Further, the vehicle ECU group 13 transmits a key OFF signal to the in-vehicle network 11 when detecting the key OFF of the vehicle.

  The occupant detection device 15 is a seating sensor provided on the seat of the vehicle, and transmits a occupant absence signal to the in-vehicle network 11 when the occupant detection state shifts from a state where the occupant is detected to a state where it is not detected.

The public wireless communication device 17 performs public wireless communication with the data center 7 in the same manner as a known mobile phone.
Next, the configuration of the portable device 5 will be described with reference to FIG. The portable device 5 includes a short-range wireless communication device (first receiving means) 27, a public wireless communication device (second receiving means) 29, a storage device 31, a central processing unit (portable device side control means) 33, Consists of The short-range wireless communication device 27 performs short-range wireless communication using Bluetooth with the short-range wireless communication device 21 mounted on the vehicle-mounted device 9. The public wireless communication device 29 performs public wireless communication with the data center 7 in the same manner as a known mobile phone. The storage device 31 stores data such as vehicle setting value information and stores a communication state and the like. The central processing unit 33 controls each component of the portable device 5 and performs processing described later by transmitting and receiving data to and from each component.

Next, the configuration of the data center 7 will be described with reference to FIG.
The data center 7 includes a public wireless communication device (third receiving means, third transmitting means) 35, a storage device (storage means) 37, and a user management device 39.

  The public wireless communication device 35 performs public wireless communication with the public wireless communication device 17 of the in-vehicle system 3 and the public wireless communication device 29 mounted on the portable device 5 in the same manner as a known mobile phone. .

  The storage device 37 stores data such as vehicle setting value information. The storage device 37 includes a plurality of storage areas 37a, 37b,... 37x divided for each user (portable device 5), and data received from each user is stored in a storage area corresponding to the user. The

  The user management device 39 controls the public wireless communication device 35 and the storage device 37 and performs processing described later by transmitting and receiving data to and from the public wireless communication device 35 and the storage device 37. In addition, when storing the data received by the public wireless communication device 35 in the storage device 37, the user management device 39 stores the data in a storage area corresponding to the user. In addition, when the data read from the specific storage area of the storage device 37 is transmitted by the public wireless communication apparatus 35, the user management apparatus 39 transmits the data to the user's portable device 5 corresponding to the storage area from which the data has been read. . By including the user ID in the data and associating the user ID with the storage area of the storage device 37, the above processing becomes possible.

2. Processes executed by the in-vehicle system 3 The processes executed by the in-vehicle system 3 (particularly the central processing unit 25) will be described based on the flowcharts of FIGS.

  In step 10 of FIG. 4, it is determined whether or not it has been detected that the occupant has exited the vehicle. Whether the occupant gets off is determined by an occupant absence signal transmitted by the occupant detection device 15 (see FIG. 1). If it is not detected that the occupant is getting off, the process proceeds to step 20. If the occupant is getting off, the process proceeds to step 30.

  In step 20, it is determined whether or not the vehicle key is turned off. The vehicle key OFF is determined by a key OFF signal transmitted from the vehicle ECU group 13 (see FIG. 1). If the vehicle key-off is not detected, the process returns to step 10, and if the vehicle key-off is detected, the process proceeds to step 30.

In step 30, a signal notifying that the passenger is getting off or detecting that the key is OFF is transmitted to the portable device 5 using the short-range wireless communication device 21.
In step 40, data A is acquired from the in-vehicle network 11, and transmission of the data A to the portable device 5 is started using the short-range wireless communication device 21. This data A is various set value information (seat position, navigation system setting, air conditioner setting, etc.) relating to the vehicle, and is transmitted by the vehicle ECU group 13 to the in-vehicle network 11.

  In step 50, it is determined whether the data transmission started in step 40 is interrupted. This determination is made as follows. The data A is transmitted by dividing the data A into a plurality of packets and sequentially for each packet. Each time the portable device 5 receives each packet, the portable device 5 transmits a reception notification corresponding to the packet to the in-vehicle system 3. When a reception notification is received for a certain packet, it is determined that transmission is not interrupted at the time of that packet. On the other hand, when the reception notification is not received for a certain packet, it is determined that the transmission is interrupted. If the transmission is not interrupted, the process proceeds to step 60, and if the transmission is interrupted, the process proceeds to step 70.

  In step 60, it is determined whether transmission of data A is completed. That is, it is determined whether or not the transmission is completed without interruption until the last packet to be transmitted among the packets obtained by dividing the data A. If the transmission of data A is completed, this process is terminated. If the transmission is not completed, the process returns to step 50 and the transmission is continued.

If it is determined in step 50 that the data transmission has been interrupted, the process proceeds to step 70 where a process of transmitting data A to the data center 7 is performed. Thereafter, this process is terminated.
The above-described processing for transmitting data A to the data center 7 will be described with reference to the flowchart of FIG.

  In step 110, data A is transmitted to the data center 7 using the public wireless communication device 17. The data A is transmitted by dividing the data A into a plurality of packets and sequentially for each packet. Each time the data center 7 receives each packet, the data center 7 transmits a reception notification corresponding to the packet to the in-vehicle system 3.

  In step 120, it is determined whether the data transmission in step 110 has failed. Specifically, when the in-vehicle system 3 receives the reception notification up to the last packet, it is determined that the data transmission has not failed, and on the other hand, when the reception notification has not been received for at least some packets It is determined that the data transmission has failed. If the data transmission has not failed, the process ends. If the data transmission has failed, the process proceeds to step 130.

  In step 130, data representing a state in which data transmission has failed (hereinafter referred to as data X) is stored in the storage device 23. The data X includes the ID of the portable device 5 that should have originally transmitted the data A.

  In step 140, a retransmission designated time is set. This re-transmission designated time can be, for example, a time at which a predetermined time has elapsed since it was determined in step 120 that data transmission failed.

  In step 150, it is determined whether or not the retransmission designated time set in step 140 has been reached. If the designated retransmission time has been reached, the process proceeds to step 160. If the designated retransmission time has not been reached, the process stays at step 150.

In step 160, the data A is transmitted to the data center 7 again using the public wireless communication device 17. The transmission method is the same as in step 110.
In step 170, it is determined whether the data transmission in step 160 has failed. The determination method is the same as in step 120. If the data transmission has not failed, the process proceeds to step 180. If the data transmission has failed, the process returns to step 140.

In step 180, the data X stored in step 130 (data indicating a state in which data transmission has failed) is erased, and then the present process ends.
The in-vehicle system 3 periodically executes the following processes separately from the above-described processes. The process will be described with reference to FIG.

  In step 210, the portable device 5 located at a distance capable of short-range wireless communication with the in-vehicle system 3 is searched. The search is performed by using the short-range wireless communication device 21 to transmit a call signal and receiving a response signal transmitted by the portable device 5 that has received the call signal. If there are a plurality of portable devices 5, a plurality of portable devices 5 can be searched. The response signal includes the ID of the portable device 5 that transmits the response signal, and the in-vehicle system 3 can identify the portable device 5 that has transmitted the response signal.

  In step 220, it is determined whether the portable device 5 capable of short-range wireless communication with the in-vehicle system 3 (corresponding to the in-vehicle system 3) is detected as a result of the search in step 210. If the corresponding portable device 5 is detected, the process proceeds to step 230. If not detected, the process returns to step 210.

  In step 230, it is determined whether or not the storage device 23 has data X (see step 130 in FIG. 5) indicating a state in which data transmission by public wireless communication has failed. If the data X exists, the process proceeds to step 240, and if the data X does not exist, the process ends.

  In step 240, the portable device 5 detected in step 210 failed to transmit data A by short-range wireless communication, and further failed to transmit data A by public wireless communication (hereinafter referred to as transmission failure). It is determined whether it is a corresponding portable device). Specifically, depending on whether the ID of the portable device 5 included in the response signal received in the search in step 210 matches the ID of the portable device 5 included in the data X, the transmission failure corresponding portable device. Judge whether there is. If it is a transmission failure corresponding portable device, the process proceeds to step 250, and if it is not a transmission failure corresponding portable device, this processing is terminated.

  In step 250, data A is transmitted to the portable device 5 detected in step 210 using the short-range wireless communication device 21. This data A has previously failed to be transmitted to the portable device 5.

  In step 260, it is determined whether or not the transmission in step 250 has failed. That is, as described in the step 50, when the data transmission is interrupted, it is determined that the transmission has failed, and when the transmission is completed up to the last packet, it is determined that the transmission has not failed. If the transmission is unsuccessful, the process returns to step 210. If the transmission is not unsuccessful, the process proceeds to step 270.

In step 270, the data X stored in step 130 is erased, and then this process ends.
3. Processing Performed by the Portable Device 5 The processing performed by the portable device 5 (particularly the central processing unit 33) will be described based on the flowcharts of FIGS.

  In step 310 of FIG. 7, it is determined whether or not the in-vehicle system 3 detects the passenger getting off. Specifically, when a signal transmitted from the in-vehicle system 3 when detecting the passenger getting off (step 30) is received, it is determined that the in-vehicle system 3 has detected the passenger getting out, and the signal is not received. In this case, it is determined that no passenger getting off is detected. When it is determined that the in-vehicle system 3 has detected the passenger getting off, the routine proceeds to step 330, and when it is determined that the passenger has not detected getting off, the routine proceeds to step 320.

  In step 320, it is determined whether or not the in-vehicle system 3 has detected the vehicle key OFF. Specifically, when a signal transmitted by the in-vehicle system 3 when the vehicle key-off is detected (step 30), it is determined that the in-vehicle system 3 has detected the key-off of the vehicle, and the above signal is received. If it is not received, it is determined that the key OFF of the vehicle is not detected. If it is determined that the in-vehicle system 3 has detected the key-off of the vehicle, the process proceeds to step 330. If it is determined that the key-off of the vehicle has not been detected, the process returns to step 310.

  In step 330, it is determined whether or not the start of reception of data transmitted from the in-vehicle system 3 using the short-range wireless communication device 21 is detected. Specifically, the central processing unit 33 of the portable device 5 detects whether the reception start of data is detected by detecting that the state of the short-range wireless communication device 27 is the reception state. If the start of data reception is detected, the process proceeds to step 340. If the start of data reception is not detected, the process proceeds to step 370.

  In step 340, reception of data transmitted from the in-vehicle system 3 using the short-range wireless communication device 21 is started. This data is the data A transmitted by the in-vehicle system 3 in the step 40.

  In step 350, it is determined whether or not the reception of data A started in step 340 has been interrupted. This determination is made as follows. The in-vehicle system 3 divides the data A into a plurality of packets and sequentially transmits each packet. When the portable device 5 receives a certain packet (excluding the last packet) and does not receive the next packet even after a predetermined time has elapsed, it determines that the reception has been interrupted. If the reception is not interrupted, the process proceeds to step 360. If the reception is interrupted, the process proceeds to step 380.

  In step 360, it is determined whether reception of data A is completed. In other words, it is determined whether or not the packet transmitted from the data A has been received without interruption up to the last transmitted packet. If the reception of data A is completed, this process is terminated. If the reception is not completed, the process returns to step 350 and the transmission is continued.

  On the other hand, if the start of data reception is not detected in step 330, the process proceeds to step 370, and a preset designated time is detected from the detection of the passenger getting off or the key-off of the vehicle (step 310 or step 320). It is determined whether or not elapses. If the specified time has elapsed, the process proceeds to step 380. If the specified time has not elapsed, the process returns to step 330.

In step 380, the public wireless communication device 29 is used to connect to the data center 7 to perform processing for acquiring data A, and then this processing is terminated.
The processing executed in step 380 will be described based on the flowchart of FIG. In step 410 of FIG. 8, the public wireless communication device 29 is used to access the data center 7 and determine whether or not the data A to be updated can be detected in the storage device 37. Here, the data A to be updated is data A that is not yet received by the portable device 5 from the in-vehicle system 3 or the data center 7. As described above, since the data center 7 includes a plurality of storage areas 37a, 37b,... 37x divided for each user, the portable device 5 accesses a storage area corresponding to itself. If the data A to be updated is not detected, the process proceeds to step 420. If the data A to be updated is detected, the process proceeds to step 480.

In step 420, data representing a state in which the data A to be updated in the data center 7 cannot be detected (hereinafter referred to as data Y) is stored in the storage device 31.
In step 430, a reconfirmation designated time is set. This reconfirmation designation time can be, for example, a time at which a predetermined time has elapsed since it was determined in step 410 or step 460 described later that data A to be updated was not detected.

  In step 440, it is determined whether or not the reconfirmation designated time set in step 430 has been reached. If the reconfirmation designated time has been reached, the process proceeds to step 450. If the reconfirmation designated time has not been reached, the process stays at step 440.

  In step 450, the public wireless communication device 29 is used again to access the data center 7, and the storage device 37 searches for the data A to be updated. As described above, since the data center 7 includes a plurality of storage areas 37a, 37b,... 37x divided for each user, the portable device 5 accesses a storage area corresponding to itself.

  In step 460, it is determined whether or not the data A to be updated is detected as a result of the search in step 450. If data A to be updated is detected, the process proceeds to step 470, and if data A to be updated is not detected, the process proceeds to step 430.

In step 470, the data Y stored in step 420 (data representing a state in which data A to be updated cannot be detected) is erased.
In step 480, the data A to be updated is acquired from the data center 7 using the public wireless communication device 29. Specifically, first, the portable device 5 sends a data A transmission command to the data center 7 using the public wireless communication device 29. On the other hand, the data center 7 transmits data A using the public wireless communication device 35, and the portable device 5 receives the data A.

  In step 490, it is determined whether the data acquisition in step 480 has failed. The determination is made as follows. Data A is transmitted by the data center 7 by dividing the data A into a plurality of packets, and sequentially performing each packet. If the portable device 5 receives without interruption until the last transmitted packet, it is determined that the acquisition of data A is successful, and if any packet cannot be received, the acquisition of data A fails. It is judged that. If acquisition of data A is successful, the process proceeds to step 500. If acquisition of data A is unsuccessful, the process proceeds to step 510.

  In step 500, if data Z representing a state in which acquisition of data A by public wireless communication has failed in step 510 described later is stored in the storage device 31, the data Z is erased. If the data Z originally does not exist, no particular processing is performed. After the process of step 500, this process is terminated.

  On the other hand, if it is determined in step 490 that the acquisition of data A is unsuccessful, the process proceeds to step 510 where data (data Z) indicating a state in which acquisition of data A by public wireless communication has failed is stored in the storage device 31. To do.

  In step 520, a reacquisition designated time is set. This reacquisition designation time can be, for example, a time at which a predetermined time has elapsed since it was determined in step 490 that acquisition of data A failed.

  In step 530, it is determined whether or not the reacquisition designated time set in step 520 has been reached. If the reacquisition designated time has been reached, the process proceeds to step 480, and if the reacquisition designated time has not been reached, the process remains at step 530.

Apart from the above-described processing, the portable device 5 also periodically executes the following processing. The process will be described with reference to FIG.
In step 610 of FIG. 9, it is determined whether or not it has been detected that the power of the portable device 5 has been switched from the OFF state to the ON state. If the power ON is detected, the process proceeds to step 620. If the power ON is not detected, the process stays at step 610.

  In step 620, the public wireless communication device 29 is used to access the data center 7 and the storage device 37 searches for the data A to be updated. As described above, since the data center 7 includes a plurality of storage areas 37a, 37b,... 37x divided for each user, the portable device 5 accesses a storage area corresponding to itself.

  In step 630, it is determined whether or not the data A to be updated is detected as a result of the search in step 620. If data A to be updated is detected, the process proceeds to step 640, and if data A to be updated is not detected, this process ends.

In step 640, the data A to be updated is acquired from the data center 7 using the public wireless communication device 29 as in step 480.
In step 650, it is determined in the same manner as in step 490 whether data acquisition in step 640 has failed. If the acquisition of data A is successful, the process proceeds to step 660, and if the acquisition of data A is unsuccessful, the process proceeds to step 670.

  In step 660, if data Z representing the state in which acquisition of data A by public wireless communication has failed in step 670, which will be described later, is stored in the storage device 31, the data Z is erased. If the data Z originally does not exist, no particular processing is performed. After the process of step 660, this process ends.

  On the other hand, if it is determined in step 650 that the acquisition of data A is unsuccessful, the process proceeds to step 670 where data (data Z) indicating a state in which acquisition of data A by public wireless communication has failed is stored in the storage device 31. To do.

  In step 680, a reacquisition designated time is set. This reacquisition designation time can be, for example, a time at which a predetermined time has elapsed since it was determined in step 650 that acquisition of data A failed.

  In step 690, it is determined whether or not the reacquisition designated time set in step 680 has been reached. When the reacquisition designated time has been reached, the process proceeds to step 640, and when the reacquisition designated time has not been reached, the process remains at step 690.

4). Advantages of the data communication system 1 The data communication system 1 can achieve the following advantages.
(i) The in-vehicle system 3 transmits data A to the data center 7 by public wireless communication when the data A cannot be transmitted to the portable device 5 by short-range wireless communication when the passenger gets off or the vehicle key is turned off. Then, the portable device 5 receives the data A from the data center 7 by public wireless communication (processing of step 70 in FIG. 4). Therefore, according to the data communication system 1, the data A stored in the portable device 5 is updated to the latest even when the data A cannot be transmitted / received by the short-range wireless communication when the passenger gets off or the vehicle key is turned off. be able to.

If the data A can be transmitted and received by the short-range wireless communication between the in-vehicle system 3 and the portable device 5 when the occupant gets off or the vehicle key is turned off, the data stored in the portable device 5 is thereby transmitted. A can be updated to the latest one.
(ii) If the in-vehicle system 3 cannot transmit the data A to the data center 7 by public wireless communication, the in-vehicle system 3 transmits the data A to the data center 7 by public wireless communication again at the retransmission designated time (see FIG. Step 160 in step 5). Thereby, transmission failure of the data A from the in-vehicle system 3 to the data center 7 can be prevented.
(iii) After failing to transmit data A by public wireless communication, the in-vehicle system 3 detects the portable device 5 that is attempting to transmit the data A at a position where short-range wireless communication is possible. 5, data A is transmitted by short-range wireless communication (processing of step 250 in FIG. 6). As a result, the data A can be reliably transmitted to the portable device 5.
(iv) When the data center 7 cannot detect the data A, the portable device 5 searches the data center 7 again at the reconfirmation designated time (step 450 in FIG. 8). If data A is detected, it is received by public wireless communication (processing at step 480 in FIG. 8). As a result, the portable device 5 can reliably receive the 7 data A from the data center.
(v) When the power is turned on, the portable device 5 checks whether there is data A to be updated in the data center 7, and if there is data A to be updated, receives it by public wireless communication (Process of step 640 in FIG. 9). Thereby, for example, the data A stored in the data center 7 during the period when the power of the portable device 5 is OFF can be taken into the portable device 5 at an early stage.

Needless to say, the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the scope of the present invention.
For example, as a short-range wireless communication system, communication using weak radio waves (smart key, keyless entry), ZIGBEE, or the like may be used.

1 is a block diagram illustrating a configuration of a data communication system 1. FIG. 4 is a block diagram illustrating a configuration of a portable device 5. FIG. 2 is a block diagram illustrating a configuration of a data center 7. FIG. It is a flowchart showing the process which the vehicle-mounted system 3 performs. It is a flowchart showing the process which the vehicle-mounted system 3 performs. It is a flowchart showing the process which the vehicle-mounted system 3 performs. 10 is a flowchart illustrating processing executed by the portable device 5. 10 is a flowchart illustrating processing executed by the portable device 5. 10 is a flowchart illustrating processing executed by the portable device 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Data communication system, 3 ... In-vehicle system, 5 ... Portable machine,
7 ... Data center, 9 ... On-board unit, 11 ... On-vehicle network,
13 ... vehicle ECU group, 15 ... occupant detection device, 17 ... public wireless communication device,
21 ... Short-range wireless communication device, 23 ... Storage device, 25 ... Central processing unit,
27 ... near field communication device, 29 ... public wireless communication device, 31 ... storage device,
33 ... Central processing unit, 35 ... Public wireless communication device, 37 ... Storage device,
37a, 37b, 37x ... storage area, 39 ... user management device

Claims (7)

A data communication system including an in-vehicle system mounted on a vehicle, a portable device, and a data center provided outside the vehicle,
The in-vehicle system is
Data acquisition means for acquiring data from the vehicle;
First transmission means for transmitting the data to the portable device by short-range wireless communication;
Second transmission means for transmitting the data to the data center by public wireless communication;
An in-vehicle system-side control unit that can detect a transmission failure of the data by the first transmission unit and causes the second transmission unit to transmit the data to the data center when the transmission failure is detected. Prepared,
The portable device is
First receiving means for receiving the data transmitted by the first transmitting means;
Second receiving means for receiving data from the data center by public wireless communication;
A portable device-side control unit that is capable of detecting a failure in receiving the data by the first receiving unit and that causes the second receiving unit to receive the data from the data center when the reception failure is detected; Prepared,
The data center
Third receiving means for receiving the data transmitted by the second transmitting means;
Storage means for storing the data received by the third receiving means;
3. A data communication system comprising: third transmission means for transmitting the data stored in the storage means to the portable device by public wireless communication.   The in-vehicle system side control means can detect the data transmission failure by the second transmission means, and when detecting the data transmission failure by the second transmission means, The data communication system according to claim 1, wherein transmission of the data is retried after a lapse of time. The in-vehicle system side control means includes
A detection unit that detects that the portable device is in a position where the short-range wireless communication is possible, and after detecting a failure in transmission by the second transmission unit, the portable unit causes the short-distance communication to be performed by the detection unit; 3. The data communication system according to claim 1, wherein when it is detected that wireless communication is possible, the first transmission unit transmits the data to the portable device. 4.   The portable device-side control means can detect failure in receiving the data by the second receiving means, and when detecting failure in receiving the data by the second receiving means, The data communication system according to any one of claims 1 to 3, wherein reception of the data is retried after a lapse of time.   The portable device-side control means includes means for determining whether or not there is the unreceived data in the data center when the portable device is turned on. The data communication system according to any one of claims 1 to 4, wherein the second receiving unit is caused to receive the unreceived data from the data center. An in-vehicle system used in the data communication system according to claim 1,
The data acquisition means;
The first transmission means;
The second transmission means;
The vehicle-mounted system side control means;
An in-vehicle system comprising: A portable device used in the data communication system according to any one of claims 1 to 5,
The first receiving means;
The second receiving means;
The portable device side control means;
A portable device comprising:

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