JP2017016417A - Transmission device, transmission system, and transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission device and a transmission method that can efficiently transmit data and restrain the congestion of a communication line, and a transmission system comprising the transmission device.SOLUTION: In a gateway 2, an information storage unit 24 has stored timing information indicating transmission timing of transmission data to be transmitted to a server 11, and data type information indicating the type of the transmission data. A relay processing unit 26 determines whether or not it is timing to transmit transmission data to the server 11 on the basis of the timing information. If the relay processing unit 26 determines that it is timing to transmit transmission data to the server 11, it obtains transmission data corresponding to a type indicated by the data type information, and instructs an out-of-vehicle communication unit 22 to transmit the obtained transmission data to the server 11. The relay processing unit 26 changes the type indicated by the transmission information or the timing indicated by the timing information stored in the information storage unit 24.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transmission apparatus and a transmission method for transmitting data to a specific apparatus, and a transmission system including the transmission apparatus.

  Various electric devices are mounted on the vehicle, and various data relating to the vehicle can be acquired from these electric devices. The acquired data can be used for various things.

  Patent Document 1 discloses a communication system in which a plurality of in-vehicle devices each transmit position data indicating the position of a vehicle to a server and create a road map based on the position data transmitted to the server.

Japanese Patent No. 4671227

  In the conventional communication system as described in Patent Document 1, a plurality of in-vehicle devices can transmit not only position data but also other data of different types, for example, vehicle speed data indicating the vehicle speed to the server. It is.

  However, the server does not need to acquire the same type of data from all the on-vehicle devices at the same time interval. For example, when a road is newly constructed, it is preferable that the server collects position data from a plurality of in-vehicle devices located in an area where the road is constructed at short time intervals. It is not necessary to acquire position data from a plurality of in-vehicle devices located in other areas, or position data may be acquired at long time intervals.

  When the server acquires position data from an in-vehicle device located in another area, as in the in-vehicle device located in the area where a new road is constructed, the in-vehicle device located in the other area is unnecessary. Since data is transmitted to the server at a high frequency, power is wasted and communication lines may be congested.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a transmission device and a transmission method capable of efficiently transmitting data and suppressing congestion of a communication line, and It is providing the transmission system provided with this transmission apparatus.

  The transmission device according to the present invention is a transmission device for transmitting data to a specific device, wherein the transmission data is to be transmitted based on timing information indicating a transmission timing of transmission data to be transmitted to the specific device. And a data acquisition unit for acquiring the transmission data based on data type information indicating the type of the transmission data when it is determined that it is a timing to be transmitted by the determination unit A transmission unit that transmits the transmission data acquired by the data acquisition unit to the specific device, and a change unit that changes a type indicated by the data type information or a timing indicated by the timing information. Features.

  The transmission device according to the present invention is characterized in that the changing unit makes a change according to a travel route of the searched vehicle.

  The transmission device according to the present invention includes a position acquisition unit that acquires position data indicating a position, and the change unit performs a change according to a region to which the position indicated by the position data acquired by the position acquisition unit belongs. It is characterized by.

  The transmission device according to the present invention includes a correction unit that corrects the transmission data acquired by the data acquisition unit based on accuracy information indicating accuracy, and the transmission unit transmits the transmission data corrected by the correction unit to the transmission data. It transmits to a specific apparatus, The said change part changes the precision which the said precision information shows, It is characterized by the above-mentioned.

  The transmission system according to the present invention includes the transmission device described above and a search unit that searches for the travel route, and the change unit performs a change according to the travel route searched by the search unit. To do.

  In the transmission system according to the present invention, the type indicated by the data type information or the timing indicated by the timing information depends on the transmission device described above and the region to which the position indicated by the position data acquired by the position acquisition unit belongs. And the change unit changes the type indicated by the data type information or the timing indicated by the timing information to the type or timing determined by the determination unit.

  The transmission method according to the present invention is a transmission method for transmitting data to a specific device, wherein the transmission data is transmitted based on timing information indicating a transmission timing of transmission data to be transmitted to the specific device. The transmission data is acquired based on the data type information indicating the type of the transmission data, and the acquired transmission data is determined as the specific transmission data when the transmission timing is determined. The data is transmitted to the apparatus, and the type indicated by the data type information or the timing indicated by the timing information is changed.

  In the transmission apparatus and transmission method according to the present invention, the data type information indicates the type of transmission data to be transmitted to a specific apparatus, and the timing information indicates the transmission timing of the transmission data. Based on the timing information, it is determined whether or not it is time to transmit the transmission data. If it is determined that it is time to transmit the transmission data, the transmission data is acquired based on the data type information, and the acquired transmission data is transmitted to a specific device.

  By changing the type of transmission data indicated by the data type information, only necessary types of data can be transmitted to a specific device. Further, by changing the timing indicated by the timing information, transmission data can be transmitted to a specific device at an appropriate frequency. As described above, by changing the type indicated by the data type information or the timing indicated by the timing information, it is possible to efficiently transmit transmission data and suppress congestion of the communication line.

  In the transmission device and the transmission system according to the present invention, the type indicated by the data type information or the timing indicated by the timing information is changed according to the travel route of the searched vehicle. Thereby, the type of transmission data or the frequency of transmitting transmission data to a specific device differs for each searched route.

  In the transmission apparatus and the transmission system according to the present invention, for example, position data indicating the position of the vehicle on which the apparatus is mounted is acquired, and the data type information is stored in accordance with the region to which the position indicated by the acquired position data belongs. The timing indicated by the type or timing information indicated is changed. Thereby, the type of transmission data or the frequency of transmitting transmission data to a specific device differs for each region to which the vehicle position belongs.

  In the transmission apparatus according to the present invention, the acquired transmission data is corrected based on accuracy information indicating accuracy. For example, when the accuracy information indicates the second decimal place, the acquired transmission data is corrected to transmission data indicating values up to the second decimal place by rounding off or rounding down. The corrected transmission data is transmitted to a specific device. Change the accuracy indicated by the accuracy information. As a result, more appropriate transmission data can be transmitted to a specific device.

  According to the present invention, it is possible to efficiently transmit transmission data and suppress congestion of a communication line.

1 is a block diagram of a communication system in a first embodiment. It is a chart for demonstrating data kind information, timing information, and precision information. It is a flowchart which shows the procedure of the transmission process to the server which a relay process part performs. It is a flowchart which shows the procedure of the content change process which a relay process part performs. 10 is a flowchart illustrating a procedure of route search processing executed by a server in the second embodiment. 10 is a flowchart illustrating a procedure of change data transmission processing executed by a server according to Embodiment 3. FIG. 10 is a block diagram of a communication system in a fourth embodiment. FIG. 10 is a block diagram of a communication system in a fifth embodiment. FIG. 10 is a block diagram of a communication system in a sixth embodiment.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram of a communication system 1 according to the first embodiment. The communication system 1 includes a gateway 2 mounted on a vehicle 10, a plurality of ECUs 3, 3,... And a plurality of ECUs 4, 4,. Is provided.

  The plurality of ECUs 3, 3,... Are connected to the communication line L1, and the plurality of ECUs 4, 4,. Communication lines L1 and L2 are connected to the gateway 2 separately. The ECUs 3, 3,... And the ECUs 4, 4,... Are connected to electric devices (not shown), and the ECUs 3, 3,. To control the electrical equipment.

  The ECUs 3, 3,... And the ECUs 4, 4,. Thereby, a plurality of electric devices can be controlled in conjunction with each other. Each of the ECUs 3 and 4 outputs data to the communication lines L1 and L2 at a preset time interval of millisecond order, and communication between the ECUs 3 and 4 is sequentially relayed by the gateway 2. The server 11, the communication device 12, and the diagnostic tool 13 also transmit / receive data to / from the ECU 3 and / or the ECU 4. Also at this time, communication is relayed by the gateway 2. Each of the server 11, the communication device 12, the diagnostic tool 13, and the ECUs 3 and 4 transmits data accompanied by identification information. The gateway 2 stores a correspondence table in which transmission destinations are associated with identification information. When the gateway 2 receives the data, the gateway 2 reads a transmission destination corresponding to the identification information attached to the received data from the correspondence table, and transmits the received data to the read transmission destination. As the transmission destination, at least one of the server 11, the communication device 12, the diagnostic tool 13, the ECUs 3, 3,... And the ECUs 4, 4,.

Further, a sensor (not shown) is connected to at least one of the ECUs 3, 3,. Among ECUs 3, 3,... And ECUs 4, 4,..., The ECU to which the sensor is connected detects a physical quantity such as the speed of the vehicle 10, the amount of depression of the brake pedal, or the amount of depression of the accelerator pedal. .
The plurality of relay data relayed by the gateway 2 includes vehicle speed data indicating the speed of the vehicle 10, brake data indicating the amount of depression of the brake pedal of the vehicle 10, or accelerator data indicating the amount of depression of the accelerator pedal of the vehicle 10. included. The vehicle speed data indicates, for example, the speed of the vehicle 10. As a matter of course, the relay data is one of data accompanied by identification information.

  The gateway 2 acquires position data indicating the position of the vehicle 10 and date / time data indicating the current date and time. The position data indicates, for example, the latitude and longitude where the vehicle 10 is located.

The gateway 2 acquires one or a plurality of transmission data to be transmitted to the server 11. For example, when the three transmission data to be transmitted to the server 11 are vehicle speed data, position data, and date / time data, the gateway 2 acquires vehicle speed data from a plurality of relay data being relayed, Acquires position data and date / time data. The gateway 2 corrects the acquired one or more transmission data, and transmits the corrected one or more transmission data to the server 11 via the network N1. The server 11 receives transmission data from the gateway 2 and stores the received transmission data.
The gateway 2 functions as a transmission device, and the server 11 functions as a specific device.

  The gateway 2 stores data type information, timing information, and accuracy information. FIG. 2 is a chart for explaining data type information, timing information, and accuracy information.

The data type information indicates the type of transmission data to be transmitted to the server 11. The type of transmission data indicated by the data type information is the position of the vehicle 10, the amount of depression of the brake, or the amount of depression of the accelerator.
The timing information indicates the timing of transmission of one or a plurality of transmission data to the server 11. The timing information corresponds to interval information indicating a time interval at which one or a plurality of transmission data should be transmitted to the server 11, or number information indicating an upper limit number of transmissions to the server 11 set for each predetermined period.

  The timing indicated by the timing information includes a timing when an engine (not shown) of the vehicle 10 is operated or stopped, a timing when the blinker is operated, a timing when the speed of the vehicle 10 exceeds a predetermined speed, or a temperature outside the vehicle 10. For example, timing when the temperature exceeds a predetermined temperature.

  The accuracy information indicates the accuracy of each of one or a plurality of transmission data corresponding to the type indicated by the data type information.

  The gateway 2 determines whether or not it is a timing at which one or a plurality of transmission data is to be transmitted based on the timing information. When the gateway 2 determines that it is time to transmit one or a plurality of transmission data, the gateway 2 acquires one or a plurality of transmission data corresponding to the type indicated by the data type information as described above. The gateway 2 corrects one or more transmission data based on the accuracy information, and transmits the corrected one or more transmission data to the server 11.

The server 11, the communication device 12, and the diagnostic tool 13 transmit to the gateway 2 change data instructing to change the content indicated by at least one of the data type information, timing information, and accuracy information stored in the gateway 2.
The gateway 2 receives change data from the server 11, the communication device 12, and the diagnosis tool 13. When the gateway 2 receives the change data, the gateway 2 changes the contents indicated by the data type information, the timing information, and the accuracy information according to the received change data.

  The gateway 2 includes a GPS (Global Positioning System) receiving unit 20, an OBD (On-board diagnostics) communication unit 21, an out-of-vehicle communication unit 22, in-vehicle communication units 23a and 23b, an information storage unit 24, a memory 25, a relay processing unit 26, and It has security parts A1, A2, A3. The GPS receiving unit 20 and the memory 25 are connected to the relay processing unit 26 separately. Each of the OBD communication unit 21 and the outside-vehicle communication unit 22 is connected to the relay processing unit 26 via the security unit A1. The in-vehicle communication units 23a and 23b are connected to the communication lines L1 and L2, respectively. Furthermore, each of the in-vehicle communication units 23a and 23b is connected to the relay processing unit 26 via the security unit A2. The information storage unit 24 is connected to the relay processing unit 26 via the security unit A3.

  The GPS receiver 20 periodically receives radio waves from a plurality of GPS satellites, and measures the position of the vehicle 10 based on the received radio waves. The GPS receiving unit 20 periodically outputs position data indicating the measured position of the vehicle 10 to the relay processing unit 26. The GPS receiving unit 20 also has a clock function, and periodically outputs the date and time data described above to the relay processing unit 26 together with the position data. Here, the date / time data indicates the date / time when the date / time data was output, and the date / time indicated by the date / time data substantially coincides with the date / time when the position indicated by the position data output together with the date / time data was measured. The relay processing unit 26 acquires position data and / or date / time data from the GPS receiving unit 20. The relay processing unit 26 functions as a position acquisition unit.

  The OBD communication unit 21 receives relay data from the diagnosis tool 13. When the OBD communication unit 21 receives relay data from the diagnostic tool 13, the OBD communication unit 21 outputs the received relay data to the relay processing unit 26 via the security unit A1. Further, relay data is input to the OBD communication unit 21 from the relay processing unit 26 via the security unit A1. The OBD communication unit 21 transmits the input relay data to the diagnosis tool 13.

  The outside-vehicle communication unit 22 receives relay data from the server 11 via the network N1 and also receives relay data from the communication device 12. When the external communication unit 22 receives relay data from the server 11 or the communication device 12, the external communication unit 22 outputs the received relay data to the relay processing unit 26 via the security unit A1. Further, relay data is input to the outside communication unit 22 from the relay processing unit 26 via the security unit A1. The vehicle exterior communication unit 22 transmits the input relay data to the server 11 or the communication device 12. Transmission data is further input to the outside communication unit 22 from the relay processing unit 26 via the security unit A2. The outside-vehicle communication unit 22 transmits the input transmission data to the server 11.

  The security unit A1 prevents unauthorized access from the server 11, the communication device 12, and the diagnostic tool 13 by mutual authentication, firewall, filtering, encryption or decryption with the server 11, the communication device 12, and the diagnostic tool 13, respectively. .

  The in-vehicle communication unit 23a receives relay data from each of the ECUs 3, 3,... Via the communication line L1. When the in-vehicle communication unit 23a receives the relay data, the in-vehicle communication unit 23a outputs the received relay data to the relay processing unit 26 via the security unit A2. Relay data is input from the relay processing unit 26 to the in-vehicle communication unit 23a via the security unit A2. The in-vehicle communication unit 23a transmits the input relay data to at least one of the ECUs 3, 3,... Via the communication line L1.

  Similarly, the in-vehicle communication unit 23b receives relay data from each of the ECUs 4, 4,... Via the communication line L2. When the in-vehicle communication unit 23b receives the relay data, the in-vehicle communication unit 23b outputs the received relay data to the relay processing unit 26 via the security unit A2. Relay data is input from the relay processing unit 26 to the in-vehicle communication unit 23b via the security unit A2. The in-vehicle communication unit 23b transmits the input relay data to at least one of the ECUs 4, 4,... Via the communication line L2.

  The security unit A2 prevents unauthorized access from the ECUs 3 and 4 by detecting the presence / absence of unauthorized in-vehicle devices, firewall or filtering.

The information storage unit 24 stores the above-described data type information, timing information, and accuracy information. Reading and changing the information is performed by the relay processing unit 26 via the security unit A3.
The security unit A3 prevents unauthorized reading and changing by the relay processing unit 26 by firewall, encryption or decryption.

  The memory 25 is a nonvolatile memory. A control program 5 is stored in the memory 25. The relay processing unit 26 has a CPU (Central Processing Unit) (not shown), and executes a relay process, a transmission process to the server 11, a content change process, and the like by executing the control program 5 stored in the memory 25. To do. The above-described correspondence table is also stored in the memory 25, and the correspondence table is read from the memory 25 by the relay processing unit 26.

  The relay process is a process of relaying communication between the ECU 3 and the ECU 4, communication between the server 11 and the ECU 3 or the ECU 4, communication between the communication device 12 and the ECU 3 or the ECU 4, and communication between the diagnostic tool 13 and the ECU 3 or the ECU 4. . In the relay processing, when one of the OBD communication unit 21, the vehicle exterior communication unit 22, and the vehicle interior communication units 23a and 23b receives the relay data, the relay processing unit 26 selects a transmission destination corresponding to the identification information of the received relay data. Read from the correspondence table. Then, the relay processing unit 26 instructs at least one of the OBD communication unit 21, the out-of-vehicle communication unit 22, and the in-vehicle communication units 23a and 23b to transmit the received relay data to the read transmission destination.

  FIG. 3 is a flowchart showing a procedure of transmission processing to the server 11 executed by the relay processing unit 26. The transmission process to the server 11 is a process of transmitting one or a plurality of transmission data to the server 11.

  First, based on the timing information, the relay processing unit 26 determines whether it is time to transmit one or a plurality of transmission data to the server 11 (step S1). When the timing information indicates, for example, the timing at which the engine of the vehicle 10 is operated, the relay processing unit 26 is the timing at which one or a plurality of transmission data should be transmitted to the server 11 when the engine of the vehicle 10 is operated. judge. When the timing information is interval information, the relay processing unit 26 transmits one or more transmission data when the time interval indicated by the interval information has elapsed since the transmission of one or more transmission data last time. Is determined to be the timing to be transmitted to the server 11. When the timing information is, for example, frequency information, the relay processing unit 26, when the number of transmissions of one or more transmission data to the server 11 in a predetermined period is less than the upper limit number indicated by the frequency information, Alternatively, it is determined that it is time to transmit a plurality of transmission data to the server 11. The relay processing unit 26 also functions as a determination unit.

  The timing information may be composed of a plurality of information. For example, when the timing information is composed of interval information and number-of-times information, the relay processing unit 26 has transmitted one or more transmission data to the server 11 last time, and the time interval indicated by the interval information has elapsed. In addition, when the number of times one or a plurality of transmission data is transmitted to the server 11 in the predetermined period is less than the upper limit number indicated by the number information, it is determined that it is time to transmit the transmission data to the server 11.

  When the relay processing unit 26 determines that it is time to transmit the transmission data to the server 11 (S1: YES), the relay processing unit 26 reads the data type information from the information storage unit 24 (step S2), and the read data type information indicates One or a plurality of transmission data corresponding to the type is acquired (step S3). For example, when the data type information indicates the position of the vehicle 10 and the speed of the vehicle 10, the relay processing unit 26 acquires the position data as one transmission data from the GPS receiving unit 20 and relays it by relay processing. Vehicle speed data is acquired as another transmission data from one or more relay data. The relay processing unit 26 also functions as a data acquisition unit.

  Next, the relay processing unit 26 reads out the accuracy information from the information storage unit 24 (step S4), and corrects the one or more transmission data acquired in step S3 based on the accuracy indicated by the read out accuracy information (step S4). S5). For example, when the relay processing unit 26 acquires vehicle speed data as one transmission data in step S3 and the accuracy information read in step S4 indicates the second decimal place for the vehicle speed data, the relay processing unit 26 performs step S5. The vehicle speed data is corrected to data indicating the vehicle speed up to the second decimal place by rounding off or rounding down. The relay processing unit 26 also functions as a correction unit.

Next, the relay processing unit 26 instructs the out-of-vehicle communication unit 22 to transmit one or a plurality of transmission data corrected in step S5 to the server 11 (step S6). The vehicle exterior communication unit 22 functions as a transmission unit.
When the accuracy information stored in the information storage unit 24 does not indicate accuracy, the relay processing unit 26 executes step S6 after executing step S4.

  When the relay processing unit 26 determines that it is not the timing to transmit one or a plurality of transmission data to the server 11 (S1: NO), or after executing Step S6, the relay processing unit 26 ends the transmission process to the server 11. Thereafter, the relay processing unit 26 executes transmission processing to the server 11 again.

  In the transmission process to the server 11, the relay processing unit 26 executes steps S2 to S6 a plurality of times when it is determined in step S1 that the transmission data should be transmitted to the server 11 (S1: YES). Thereafter, the transmission process may be terminated.

  FIG. 4 is a flowchart illustrating a procedure of content change processing executed by the relay processing unit 26. The content change process is a process for changing the content indicated by at least one of the data type information, the timing information, and the accuracy information stored in the information storage unit 24. The relay processing unit 26 executes content change processing when the OBD communication unit 21 receives change data from the diagnosis tool 13 or when the vehicle communication unit 22 receives change data from the server 11 or the communication device 12. As described above, the change data is data instructing to change the content indicated by at least one of the data type information, timing information, and accuracy information stored in the gateway 2, that is, the information storage unit 24.

  The relay processing unit 26 changes the content indicated by at least one of the data type information, the timing information, and the accuracy information according to the changed data received by the OBD communication unit 21 or the outside-vehicle communication unit 22 (step S11). The relay process part 26 complete | finishes a content change process, after performing step S11. The relay processing unit 26 also functions as a changing unit.

  In the content change process, the relay processing unit 26 can change, for example, the content of the interval information or the number of times information as timing information, and further, the timing information is information indicating the timing at which the engine of the vehicle 10 is operated, for example Can be changed to interval information. Further, the relay processing unit 26 can change the type of transmission data indicated by the data type information, for example, from the position of the vehicle 10 to the position of the vehicle 10 and the amount of depression of the accelerator. In this case, in the transmission process to the server 11, each of the position data and the accelerator data is acquired as transmission data by the relay processing unit 26. Furthermore, the accuracy of one or a plurality of transmission data corresponding to the type indicated by the data type information can be changed from, for example, the second decimal place to an integer.

  The server 11 constitutes the communication system 1 together with the gateway 2 mounted on each of a plurality of vehicles configured in the same manner as the vehicle 10, and receives transmission data from the gateway 2 mounted on these vehicles, and receives the transmission data. The transmitted data is stored.

  In the gateway 2 configured as described above, the relay processing unit 26 can transmit only necessary types of transmission data to the server 11 by changing the type of transmission data indicated by the data type information. By changing the timing indicated by the timing information, the data can be transmitted to the server 11 at an appropriate frequency. As a result, the gateway 2 can efficiently transmit transmission data and suppress congestion of the communication line. Further, the relay processing unit 26 can transmit more appropriate transmission data to the server 11 by changing the accuracy indicated by the accuracy information.

(Embodiment 2)
In the communication system 1 according to the first embodiment, the server 11 searches for the travel route used in the car navigation system, and determines and determines the contents of the data type information, the timing information, and the accuracy information according to the searched travel route. Change data instructing a change to the contents may be transmitted to the gateway 2.
In the following, the differences between the second embodiment and the first embodiment will be described. Since the other configuration of the second embodiment except the configuration to be described later is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

  In the communication system 1 according to the second embodiment, a plurality of ECUs 3, 3,... Include an ECU 3 for a car navigation system (see FIG. 1). Below, ECU3 for car navigation systems is described as ECU3a.

  The ECU 3a has a reception unit (not shown) that receives a destination point from the user. ECU3a transmits the search request | requirement which requests | requires the search of the driving route from the position of the present vehicle 10 to the destination point to the in-vehicle communication part 23a of the gateway 2 via the communication line L1, when a reception part receives the destination point. To do.

  When the in-vehicle communication unit 23a receives a search request from the ECU 3a, the relay processing unit 26 acquires position data from the GPS receiving unit 20, and associates the acquired position data with the search request received by the in-vehicle communication unit 23a. Then, the relay processing unit 26 instructs the outside communication unit 22 to transmit a search request accompanied by position data to the server 11.

  The server 11 has a CPU (not shown) and executes a route search process by executing a control program (not shown). FIG. 5 is a flowchart illustrating a procedure of route search processing executed by the server 11 according to the second embodiment. The server 11 executes a route search process when receiving a search request accompanied by position data from the outside communication unit 22 of the gateway 2.

  In the route search process, the server 11 first searches for a travel route on which the vehicle 10 should travel from the position indicated by the position data associated with the search request to the destination point related to the received search request (step S21). . The server 11 also functions as a search unit.

Next, the server 11 determines the contents of data type information, timing information, and accuracy information to be stored in the information storage unit 24 according to the travel route of the vehicle 10 searched in step S21 (step S22). Next, the server 11 transmits route data indicating the search result in step S21 and change data instructing a change to the content determined in step S22 to the out-of-vehicle communication unit 22 of the gateway 2 (step S23).
After executing step S23, the server 11 ends the route search process.

  In the content change process of the relay processing unit 26 that is executed after the server 11 transmits the changed data to the outside communication unit 22 of the gateway 2 in the route search process, the data type information, the timing information, and the information stored in the information storage unit 24 The content indicated by at least one of the accuracy information is changed in accordance with the change data received by the external communication unit 22. As described above, the relay processing unit 26 indicates the content indicated by at least one of the data type information, the timing information, and the accuracy information stored in the information storage unit 24 according to the travel route of the vehicle 10 searched by the server 11. change. For this reason, one or a plurality of transmission data that the out-of-vehicle communication unit 22 transmits to the server 11 in the transmission process to the server 11 and the frequency at which the one or more transmission data is transmitted to the server 11 are determined by the server 11 as a route search process. Different for each travel route searched in.

  Based on the travel route searched by the server 11, for example, when it is estimated that the vehicle 10 travels in an area where a new road is constructed, the type of transmission data indicated by the data type information and the timing indicated by the timing information are changed. By doing so, the server 11 can collect various transmission data from the gateway 2 with high frequency. Based on the travel route searched by the server 11, for example, when the vehicle 10 is estimated to travel outside the area where a new road has been constructed, the type of transmission data indicated by the data type information and the timing indicated by the timing information are changed. By doing so, the server 11 can collect the minimum types of transmission data from the gateway 2 at a low frequency.

  When the outside communication unit 22 of the gateway 2 receives the route data transmitted by the server 11 in the route search process, the relay processing unit 26 instructs the in-vehicle communication unit 23a to obtain the route data received by the outside communication unit 22. It is made to transmit to ECU3a. When the ECU 3a receives the route data from the external communication unit 22, the ECU 3a displays the travel route indicated by the received route data on a display unit (not shown) together with the map. Thereby, the user can grasp | ascertain the driving | running route which the vehicle 10 should drive | work.

  Since the configuration other than the configuration described above is the same as that in the first embodiment, the gateway 2 in the second embodiment has the same effects as those in the first embodiment.

(Embodiment 3)
In the gateway 2 in the first embodiment, the server 11 determines the contents of the data type information, timing information, and accuracy information to be stored in the information storage unit 24 according to the region to which the position of the vehicle 10 belongs. Change data instructing a change to the contents may be transmitted to the gateway 2.
In the following, the differences between the third embodiment and the first embodiment will be described. Since the other configurations of the third embodiment excluding the configurations described later are the same as those of the first embodiment, the same reference numerals are given and the description thereof is omitted.

In the communication system 1 according to the third embodiment, the relay processing unit 26 instructs the outside data communication unit 22 to periodically transmit the position data and date / time data acquired from the GPS receiving unit 20 to the server 11 periodically. The server 11 receives the position data and the date / time data from the vehicle exterior communication unit 22 and stores the received position data in association with the date / time data received together with the position data. The server 11 has a CPU (not shown) and executes a change data transmission process by executing a control program (not shown). The change data transmission process is a process of transmitting the change data to the outside communication unit 22 based on the position data received from the outside communication unit 22.
In the server 11, data type information, timing information, and accuracy information are stored in association with each of a plurality of areas related to the position.

  FIG. 6 is a flowchart illustrating a procedure of change data transmission processing executed by the server 11 according to the third embodiment. When the server 11 receives position data and date / time data from the vehicle exterior communication unit 22, the server 11 executes a change data transmission process.

  In the change data transmission process, the server 11 first stores the received position data in association with the date / time data received together with the position data (step S31). The server 11 executes a change data transmission process each time the out-of-vehicle communication unit 22 receives the position data and date / time data, and corresponds to the date / time data received with the position data indicating the position of the vehicle 10 in step S31. Add and remember. For this reason, the server 11 also stores past position data indicating the position of the vehicle 10.

  After executing step S31, the server 11 determines whether or not the region to which the position of the vehicle 10 has changed has been changed based on the plurality of positions indicated by the plurality of stored position data (step S32). ). For example, in the server 11, the area to which the position of the vehicle 10 indicated by the latest position data received from the outside communication unit 22 belongs is different from the area to which the position of the vehicle 10 indicated by the position data received from the outside communication unit 22 last time belongs. In this case, it is determined that the region to which the position of the vehicle 10 belongs has changed. In the server 11, the region to which the position of the vehicle 10 indicated by the latest position data received from the outside communication unit 22 belongs is the same as the region to which the position of the vehicle 10 indicated by the position data received from the outside communication unit 22 last time belongs. When it is, it determines with the area | region where the position of the vehicle 10 belongs not having changed.

  When the server 11 determines that the area to which the position of the vehicle 10 belongs has changed (step S32: YES), the server 11 should be stored in the information storage unit 24 of the gateway 2 according to the area to which the position of the vehicle 10 belongs. The contents of the data type information, timing information and accuracy information are determined (step S33). Specifically, the server 11 reads data type information, timing information, and accuracy information corresponding to the region to which the position of the vehicle 10 indicated by the latest position data belongs. Then, the server 11 determines the contents of the data type information, timing information, and accuracy information to be stored in the information storage unit 24 as the contents of the read data type information, timing information, and accuracy information. The server 11 also functions as a determination unit.

Next, the server 11 transmits change data instructing a change to the content determined in step S33 to the vehicle exterior communication unit 22 of the gateway 2 (step S34).
If the server 11 determines that the region to which the position of the vehicle 10 belongs has not been changed (S32: NO), or after executing step S34, the changed data transmission process is terminated.

  Data type information and timing information stored in the information storage unit 24 in the content change process of the relay processing unit 26 executed after the server 11 transmits the change data to the outside communication unit 22 of the gateway 2 in the change data transmission process. And the content which at least 1 of accuracy information shows is changed according to the change data which the vehicle exterior communication part 22 received. As described above, the relay processing unit 26 determines the content indicated by at least one of the data type information, the timing information, and the accuracy information stored in the information storage unit 24 by the server 11 in step S33 of the change data transmission process. Change to For this reason, the position of the vehicle 10 belongs to one or a plurality of transmission data transmitted from the vehicle communication unit 22 to the server 11 in the transmission process to the server 11 and the frequency of transmitting one or a plurality of transmission data to the server 11. Different for each region.

Accessing the range of the area stored in the server 11 and the contents indicated by the data type information, timing information and accuracy information associated with the area from the outside via the network N1, for example. It is possible to change by.
Therefore, for example, by changing the contents of the data type information and the timing information associated with the area where the new road is constructed in the server 11, the server 11 is positioned in the area where the new road is constructed. Various transmission data can be collected from the vehicle 10 to which it belongs. Furthermore, in the server 11, by changing the contents of the data type information and the timing information associated with other areas other than the area where the road is newly constructed, the server 11 can change the area where the road is newly constructed. It is possible to collect a minimum number of types of transmission data from the vehicle 10 to which the position belongs outside.

  Since the configuration other than the configuration described above is the same as that in the first embodiment, the gateway 2 in the third embodiment has the same effect as that in the first embodiment.

(Embodiment 4)
In the communication system 1 according to the first embodiment, the GPS receiver 20, the OBD communication unit 21, and the vehicle exterior communication unit 22 are included in the gateway 2. However, the configuration of the communication system 1 is not limited to such a configuration.
Hereinafter, the differences between the fourth embodiment and the first embodiment will be described. Since the other configuration of the fourth embodiment except the configuration to be described later is the same as that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

  FIG. 7 is a block diagram of the communication system 1 according to the fourth embodiment. The communication system 1 according to the fourth embodiment includes a GPS receiving unit 20, an OBD communication unit 21, an out-of-vehicle communication unit 22, a gateway 6, and a plurality of ECUs 3, 3. 4,..., A server 11, a communication device 12, and a diagnosis tool 13.

  The gateway 6 includes in-vehicle communication units 23a and 23b, an information storage unit 24, a memory 25, a relay processing unit 26, and security units A1, A2, and A3. These, the GPS receiving unit 20, the OBD communication unit 21, and the vehicle exterior communication unit 22 are connected in the same manner as in the first embodiment.

The communication system 1 according to the fourth embodiment configured as described above has the same effects as the communication system 1 according to the first embodiment.
In the fourth embodiment, the vehicle exterior communication unit 22 and the gateway 6 function as a transmission device.

  Moreover, each component of the communication system 1 according to the fourth embodiment may execute the same contents as each component of the communication system 1 according to the second or third embodiment. In this case, the communication system 1 according to the fourth embodiment has the same effects as those of the second or third embodiment.

(Embodiment 5)
In the communication system 1 according to the fourth embodiment, the gateway 6 may be configured by two devices that communicate with each other.
In the following, the difference between the fifth embodiment and the fourth embodiment will be described. Since the other configuration of the fifth embodiment except the configuration to be described later is the same as that of the fourth embodiment, the same reference numerals are given and the description thereof is omitted.

  FIG. 8 is a block diagram of the communication system 1 according to the fifth embodiment. The communication system 1 according to the fifth embodiment includes a first gateway 6 a and a second gateway 6 b instead of the gateway 6. The first gateway 6a is connected to the GPS receiving unit 20, the OBD communication unit 21, the vehicle outside communication unit 22, and the second gateway 6b separately.

  The first gateway 6a includes an information storage unit 24, a memory 25a, a first relay processing unit 26a, a first communication unit 7a, and a security unit A1. The GPS receiving unit 20 is connected to the first relay processing unit 26a, and each of the OBD communication unit 21 and the outside-vehicle communication unit 22 is connected to the first relay processing unit 26a via the security unit A1. The information storage unit 24 is connected to the first relay processing unit 26a via the security unit A3. The memory 25a and the first communication unit 7a are individually connected to the first relay processing unit 26a. The first communication unit 7a is connected to the second gateway 6b. The memory 25a is a nonvolatile memory, and a control program 5a is stored in the memory 25a.

  The second gateway 6b includes in-vehicle communication units 23a and 23b, a memory 25b, a second relay processing unit 26b, a second communication unit 7b, and a security unit A2. The second communication unit 7b is connected to the first communication unit 7a of the first gateway 6a and is connected to the second relay processing unit 26b via the security unit A2. Each of the in-vehicle communication units 23a and 23b is connected to the second relay processing unit 26b via the security unit A2. The memory 25b is connected to the second relay processing unit 26b. The memory 25b is a nonvolatile memory, and a control program 5b is stored in the memory 25b.

  Data is input to the first communication unit 7a from the first relay processing unit 26a. The first communication unit 7a transmits the input data to the second communication unit 7b. The second communication unit 7b outputs the data received from the first communication unit 7a to the second relay processing unit 26b via the security unit A2.

  Data is input to the second communication unit 7b from the second relay processing unit 26b via the security unit A2. The second communication unit 7b transmits the input data to the first communication unit 7a. The first communication unit 7a outputs the data received from the second communication unit 7b to the first relay processing unit 26a.

  The security unit A2 detects unauthorized access to the second relay processing unit 26b from the second communication unit 7b by detecting the presence or absence of unauthorized in-vehicle devices, firewall or filtering, and the second communication unit 7b from the second relay processing unit 26b. Prevent unauthorized access to.

  The first relay processing unit 26a and the second relay processing unit 26b cooperate with each other by communication between the first communication unit 7a and the second communication unit 7b, and realize the same function as the relay processing unit 26 in the fourth embodiment. doing. Each of the first relay processing unit 26a and the second relay processing unit 26b has a CPU (not shown). The first relay processing unit 26a executes the control program 5a stored in the memory 25a, and the second relay processing unit 26b executes the control program 5b stored in the memory 25b.

The communication system 1 according to the fifth embodiment configured as described above has the same effects as the communication system 1 according to the fourth embodiment.
In the fifth embodiment, the vehicle exterior communication unit 22, the first gateway 6a, and the second gateway 6b function as a transmission device. The first relay processing unit 26a and the second relay processing unit 26b function as a data acquisition unit, a position acquisition unit, a determination unit, a change unit, and a correction unit.

(Embodiment 6)
In the fifth embodiment, the first gateway 6a includes the information storage unit 24 and the security unit A2. However, the configuration of the communication system 1 is not limited to the configuration in which the first gateway 6a includes the information storage unit 24 and the security unit A2.
Hereinafter, the differences of the sixth embodiment from the fifth embodiment will be described. Since the other configurations of the sixth embodiment excluding the configurations described later are the same as those of the fifth embodiment, the same reference numerals are given and the description thereof is omitted.

  FIG. 9 is a block diagram of the communication system 1 according to the sixth embodiment. In the communication system 1, not the first gateway 6a but the second gateway 6b includes the information storage unit 24 and the security unit A2. The information storage unit 24 is connected to the second relay processing unit 26b via the security unit A3.

  The first relay processing unit 26a and the second relay processing unit 26b cooperate with each other by communication between the first communication unit 7a and the second communication unit 7b, and realize the same function as the relay processing unit 26 in the fourth embodiment. doing.

The communication system 1 in the sixth embodiment configured as described above has the same effects as the communication system 1 in the fourth embodiment.
In the sixth embodiment, as in the fifth embodiment, the vehicle exterior communication unit 22, the first gateway 6a, and the second gateway 6b function as a transmission device. The first relay processing unit 26a and the second relay processing unit 26b function as a data acquisition unit, a position acquisition unit, a determination unit, a change unit, and a correction unit.

  In the first to sixth embodiments, the number of communication lines to which the ECU is connected is not limited to 2, and may be 1 or 3 or more. In this case, one vehicle communication unit and at least one ECU are connected to one or a plurality of communication lines.

  The disclosed first to sixth embodiments are examples in all respects and should be considered not to be restrictive. The scope of the present invention is defined not by the above-mentioned meaning but by the scope of claims for patent, and is intended to include all modifications within the scope and meaning equivalent to the scope of claims for patent.

10 vehicle 11 server (specific device, search unit, determination unit)
2 Gateway (Transmitter)
22 External communication part (transmission part)
26 Relay processing unit (data acquisition unit, position acquisition unit, determination unit, change unit, correction unit)
26a 1st relay process part (a part of each of a data acquisition part, a position acquisition part, a determination part, a change part, and a correction part)
26b 2nd relay processing part (a part of each of a data acquisition part, a position acquisition part, a determination part, a change part, and a correction part)
6 Gateway (part of transmitter)
6a First gateway (part of the transmission device)
6b Second gateway (part of transmission device)

Claims (7)

In a transmission device that transmits data to a specific device,
A determination unit that determines whether or not it is a timing to transmit the transmission data based on timing information indicating a transmission timing of transmission data to be transmitted to the specific device;
A data acquisition unit that acquires the transmission data based on data type information indicating a type of the transmission data when the determination unit determines that it is a timing to transmit;
A transmission unit that transmits the transmission data acquired by the data acquisition unit to the specific device;
A transmission device comprising: a change unit that changes a type indicated by the data type information or a timing indicated by the timing information. The transmission device according to claim 1, wherein the change unit performs a change according to a searched travel route of the vehicle. A position acquisition unit for acquiring position data indicating the position;
The transmission device according to claim 1, wherein the change unit performs change according to a region to which a position indicated by the position data acquired by the position acquisition unit belongs. A correction unit for correcting the transmission data acquired by the data acquisition unit based on accuracy information indicating accuracy;
The transmission unit transmits the transmission data corrected by the correction unit to the specific device,
The transmission device according to any one of claims 1 to 3, wherein the changing unit changes the accuracy indicated by the accuracy information. A transmission device according to claim 2;
A search unit for searching for the travel route,
The transmission unit according to claim 1, wherein the change unit performs a change according to the travel route searched by the search unit. A transmission device according to claim 3;
A determination unit that determines a type indicated by the data type information or a timing indicated by the timing information according to an area to which the position indicated by the position data acquired by the position acquisition unit belongs,
The transmission system, wherein the changing unit changes the type indicated by the data type information or the timing indicated by the timing information to the type or timing determined by the determining unit. In a transmission method for transmitting data to a specific device,
Based on timing information indicating the transmission timing of transmission data to be transmitted to the specific device, it is determined whether or not it is the timing to transmit the transmission data,
When it is determined that it is time to transmit, the transmission data is acquired based on the data type information indicating the type of the transmission data,
Transmitting the acquired transmission data to the specific device;
The transmission method characterized by changing the type indicated by the data type information or the timing indicated by the timing information.

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