JP6403407B2 - Data update method, data update system, and terminal device - Google Patents

Description

  The present invention relates to a data update method, and more particularly to a method for updating data (for example, map data) held by a terminal.

  Recently, navigation systems that acquire the latest map data and update the map data held by terminals by storing map data and geo-related information in a storage medium and accessing the server via a wireless network have become widespread. It's getting on. In such a navigation system, map data update processing is executed in response to a user operation. FIG. 2 shows a conventional update processing sequence.

  As background art in this technical field, there are JP-A-2005-331278 (Patent Document 1) and JP-A-2009-157227 (Patent Document 2).

  Patent Document 1 discloses position detection means 1 for detecting the current position of a vehicle, rewritable map data storage means for storing map data, display means for displaying a map, and a predetermined area around the current position of the vehicle. The map data is read from the map data storage means and sent to the display means, so that the control means for executing the navigation function, the update map data acquisition means for acquiring the update map data, and the map in response to the instruction from the control means Map data update means for updating the map data in the data storage means to update map data acquired by the update map data acquisition means, and the control means further reads out the map data in parallel with the execution of the navigation function The map data update means is instructed to update the map data according to the situation and the update situation. A map data update device is described.

  Moreover, in patent document 2, it is a map data delivery system provided with a navigation terminal and a map delivery server, and a map delivery server is an update element which shows the difference update data which shows the difference of map data, and the update which is identification information. A management data storage unit 11 for storing update element management data including an element ID and a dependency update element ID having an update date and time before update of the map data and having a dependency relationship for the update of the map data; An update element management data having a location area that overlaps the map area of the map distribution request, an update management data extracting unit for extracting update element management data having a dependent update element ID from the update element management data, and a navigation terminal With a network interface that communicates with Data distribution system are described.

JP-A-2005-331278 JP 2009-157227 A

  In the prior art described above, as described in Patent Document 1, the user is forced to stop the function of the navigation system during the map data update process. For this reason, when the user does not execute the map data update process for a long period of time or once, there is a case where Fushio integration occurs between different generations of map data (see Patent Document 2). For example, the update data held in the map data distribution server may not be discarded due to the dependency between the map update data. For example, as shown in FIG. 6, when the difference between the second-generation map and the third-generation map is reflected on the map data, a state occurs in which the initial → second-generation map difference must be reflected on the map data first. For this reason, the server holds an enormous amount of update data over time, which increases the computer resources necessary for the operation of the map data distribution system.

  Moreover, in patent document 1, map data update processing is performed without stopping a navigation function by storing the map data before update in memory. However, if an abnormality such as a power failure of the terminal device occurs during the update process, the map data being updated remains in the updated map data storage device. In this case, the map data after restarting the terminal may not be guaranteed to be consistent, and it is expected that the update process must be performed again from the beginning.

  An object of the present invention is to execute map data update processing without stopping the function of the navigation system, and to reduce the amount of update data held by the server.

A typical example of the invention disclosed in the present application is as follows. That is, a data update method in a data distribution system including a server device that distributes update data and a plurality of terminal devices that receive update data distributed from the server device, the server device being included in the server device Distribution means for distributing the update data stored in the terminal device, the terminal device receiving means for receiving update data distributed from the server device, a memory for storing the received update data, an update target Storage means for storing data, wherein the method is a step in which the terminal device automatically determines when to update the data, and a grid that divides the map data stored in the storage means determining the number of partitions to be updated in accordance with the specification for the management unit, step for acquiring update data of the determined update target area Updating the data on the memory using the acquired update data, determining whether the data update is successful, storing the updated data in the storage means, The method includes a step of updating a version of the updated data, and a step of discarding the acquired update data after the update of the version is completed.

  According to the typical embodiment of the present invention, it is possible to update the map data to the latest without requiring any user operation. In addition, server resources necessary for the operation of the map data update system can be reduced. Problems, configurations, and effects other than those described above will become apparent from the description of the following embodiments.

It is a block diagram which shows the structure of the navigation terminal device 31 of embodiment of this invention. It is a block diagram of the navigation system of conventional embodiment. 1 is a configuration diagram of a navigation system according to an embodiment of the present invention. It is a flowchart of the map data update process performed with the navigation terminal device 31 of this embodiment of this invention. It is a figure explaining the structural example of the map version management table contained in the map data of embodiment of this invention. It is a figure explaining the dependence of map data. It is a block diagram which shows the structure of the delivery server apparatus 33 of embodiment of this invention.

  Hereinafter, an embodiment of a terminal map data update method to which the present invention is applied will be described.

  FIG. 3 is a configuration diagram of the navigation system according to the embodiment of the present invention.

  The navigation terminal device 31 is connected to the distribution server device 33 via the network 32.

  The navigation application 310 of the navigation terminal device 31 determines the update processing execution timing and requests update data from the distribution server device 33.

  The update data distribution application 330 of the distribution server device 33 confirms the map version of the navigation terminal device 31, creates a data set to be distributed, and distributes update data to the navigation terminal device 31.

  The navigation application 310 determines the update process execution timing, acquires update data from the distribution server device 33, buffers the pre-update data in the memory device 15, and executes the update process in the memory device 15. Then, the update processing is reflected on the map data stored in the external storage device 13. Details of the map data update process executed by the navigation application 310 will be described later with reference to FIG.

  FIG. 1 is a block diagram showing the configuration of the navigation terminal device 31 of the present embodiment.

  The navigation terminal device 31 of this embodiment includes an input / output device 11, a GPS device 12, an external storage device 13, a data access processing block 14, a memory device 15, a communication device 16, an update processing block 17, and an overall control processing block 18. .

  The input / output device 11 is an interface that receives input of various instructions and displays processing results, and includes a touch panel, operation keys, a liquid crystal display device, and the like. The GPS device 12 receives a signal transmitted from a GPS satellite and detects the current position. The external storage device 13 is a non-volatile storage device (such as a flash memory or a magnetic disk device) that stores map data and map-related information. The data access processing block 14 has a function of reading out map data and map related information from the external storage device 13, and can be configured by, for example, a database management system. The memory device 15 stores data read by the data access processing block 14 and data acquired via the communication device 16. The communication device 16 is connected to the network 32 and controls communication according to a predetermined communication protocol. Specifically, the navigation system accesses the distribution server device 33 via the communication device 16 and acquires update data. The update processing block 17 executes processing for updating the map data using the acquired update data. The overall control processing block 18 controls the entire navigation system.

  FIG. 5 is a diagram illustrating a configuration example of a map version management table included in the map data of the present embodiment.

  The map version management table shown in FIG. 5 includes TYPE_ID, AREA_ID, and VERSION.

TYPE_ID is identification information obtained by classifying data constituting map data for each type. For example, it is classified as follows.
1: Shape information for expressing the shape of a feature such as a road or a building 2: Search information used by route search processing such as regulation information (speed limit, one-way traffic, etc.) related to the road, actual length, gradient, etc. 3: Guidance information used by guidance processing such as road name, intersection name, voice and image 4: Point information such as facilities used to determine the destination 5: Number of road lanes (including lane information for right and left turn only) and intersections High-precision information related to automated driving technology, such as the position of stop lines, the width of roads (including sidewalks), and the positions of features that protrude from the roadway

  AREA_ID is identification information assigned to each map management section. VERSION is a version of data uniquely determined by TYPE_ID and AREA_ID.

  FIG. 7 is a block diagram illustrating a configuration of the distribution server device 33 according to the present embodiment.

  The distribution server device 33 includes a communication device 71, an external storage device 72, a data access processing block 73, a memory device 74, a distribution data generation processing block 75, and an overall control processing block 76.

  The communication device 71 is connected to the network 32 and controls communication according to a predetermined communication protocol. Specifically, the distribution server device 33 receives a request from the navigation terminal device 31 via the communication device 71 and returns a processing result. The external storage device 72 is a non-volatile storage device (such as a magnetic disk device or a flash memory) that stores map data and map-related information. The data access processing block 73 has a function of reading out map data and map related information from the external storage device 72, and can be configured by, for example, a database management system. The memory device 74 stores data read by the data access processing block 73 and data acquired via the communication device 71. The distribution data generation processing block 75 interprets the request from the navigation terminal device 31 and generates distribution data. The overall control processing block 76 controls the entire distribution server device 33.

  Next, the map update processing method of this embodiment will be described.

  FIG. 4 is a flowchart of map data update processing executed by the navigation application 310 of the navigation terminal device 31 of the present embodiment.

  Since the map data update process according to the present embodiment is not triggered by a user operation, the overall control process block 18 determines the update process execution timing (step 410). The update process execution timing may be executed when a predetermined time has elapsed from a predetermined event. For example, when starting, when 10 minutes have elapsed since the power was turned on. The update process may be executed at a predetermined time (for example, every day at 12:00). Further, the update processing execution timing may be determined using the position information of the terminal. For example, when entering the road that passes for the first time, or when the set destination is the first place to go.

  When the overall control processing block 18 determines that it is the update processing execution timing, the control is transferred to the update processing block 17. Before executing the update process, the update process block 17 determines whether there is an update process that has been canceled due to an error or a user operation before the update process to be executed (step 420). Whether there is an update process that has been canceled can be determined based on the execution result of each process from steps 421 to 425 executed by the update process block 17, that is, whether the data being updated is stored in the external storage device 13. .

  If the update processing block 17 determines that there is no data being updated, the update processing block 17 determines an update target area (step 421). When determining the update target area from the location information of the terminal, determine how many sections to update according to the specifications of the map management sections stored in the external storage device 13 (the specifications of the management unit that is the grid that divides the map data) To do. The same applies when the update target area is determined from the position information set as the destination. After determining the update target area, the update processing block 17 controls the communication device 16, accesses the distribution server device 33, and determines the update target area (step 421). After the update processing block 17 determines the update target area, the control is transferred to the data access processing block 14.

  The data access processing block 14 acquires the map version of the update target area from the map version management table (FIG. 5) stored in the external storage device 13, and sends it to the update processing block 17 (step 431). After obtaining the map version of the update target area, control is transferred to the update processing block 17.

  When the update processing block 17 receives the map version of the update target region from the data access processing block 14, the update processing block 17 requests the distribution server device 33 for the map version of the update target region, and acquires the requested version of the map data from the distribution server device 33. (Step 422). Thereafter, the update processing block 17 determines whether or not the requested version of map data has been acquired from the distribution server device 33 (step 423). If the requested version of map data cannot be acquired from the distribution server device 33, the map data update process is terminated. On the other hand, if the requested version of the map data can be acquired from the distribution server device 33, the control shifts to the data access processing block 14.

  The data access processing block 14 acquires the map data of the update target area from the external storage device 13 (step 432), and control is transferred to the update processing block 17.

  The update processing block 17 stores the map data acquired by the data access processing block 14 in the memory device 15 as a map update processing target (step 424). The data stored in the memory device 15 cannot be used by the navigation application 310 until the map data update process is completed. Since the map data used by the navigation application 310 is separately read from the external storage device 13 and stored in another area (for example, a work area) on the memory device 15, it is necessary to stop the function of the navigation system even during the map update process. There is no.

  The update processing block 17 saves the acquired map data in the memory device 15, and then updates the map data stored in the memory device 15 based on the acquired update data (step 424). Thereafter, the update processing block 17 determines whether the update processing has succeeded normally without error (step 425). If the update process is successful, control is transferred to the data access process.

  Thereafter, the data access processing block 14 reflects the updated map data stored in the memory device 15 in the map data stored in the external storage device 13. Thereby, the navigation application 310 can read the updated map data from the external storage device 13. Further, the map version of the update target area is updated to the map version described in the update data acquired by the update processing block 17 (step 433). While the data access processing block 14 is executing the process, the navigation application 310 accesses the map data stored in the memory device 15. Thereafter, control is transferred to the update processing block 17.

  The update processing block 17 discards the acquired update data (step 426). Thereafter, control is transferred to the overall control processing block 18, and the map data update processing is terminated.

  When the update process block 17 determines that the update process has failed in step 425, the control is transferred to the overall control process block 18, and the update process is terminated. At that time, the data acquired by the update processing block 17 and the data access processing block 14 is saved in the external storage device 13. This is used when the update processing block 17 executes the map data update process when the next update process is executed.

  If it is determined in step 420 that there is an update process that has been cancelled, control is transferred to the data access processing block 14. The data access processing block 14 acquires the update data saved in the external storage device 13 (step 430), and executes the processing after step 432.

  In addition, when the navigation terminal device 31 is not activated within the update data holding period and the map data update process is not executed, the map data of the navigation terminal device 31 is updated by another system.

  As described above, in the map data update process according to the present embodiment, the navigation terminal device 31 executes the map data update process without stopping the navigation function. It can be updated and the navigation function using the latest map data can be used.

  In addition, since the update process is performed on the memory device 15 and the update process status is sequentially recorded, even if the update process is interrupted due to power-off of the navigation terminal device 31 during the update process, the consistency of the map is maintained. There is no damage, and the update process can be continued next time.

  Further, since update data is automatically acquired from the server without requiring any user operation, when the update data retention period determined in service operation has passed, the update data is stored in the external storage device 72 of the distribution server device 33. The update data that is present can be discarded. For this reason, an increase in storage resources of the distribution server device 33 can be suppressed.

  In addition, as the large-capacity high-precision map data required for future automated driving technology progresses, a part of the large-capacity high-accuracy data (for example, only high-precision data existing on the route that is the search result) is updated. It can be acquired as data, and the resources necessary to realize the automatic driving function can be reduced.

  The present invention is not limited to the above-described embodiments, and includes various modifications and equivalent configurations within the scope of the appended claims. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and the present invention is not necessarily limited to those having all the configurations described. A part of the configuration of one embodiment may be replaced with the configuration of another embodiment. Moreover, you may add the structure of another Example to the structure of a certain Example. In addition, for a part of the configuration of each embodiment, another configuration may be added, deleted, or replaced.

  In addition, each of the above-described configurations, functions, processing units, processing means, etc. may be realized in hardware by designing a part or all of them, for example, with an integrated circuit, and the processor realizes each function. It may be realized by software by interpreting and executing the program to be executed.

  Information such as programs, tables, and files that realize each function can be stored in a storage device such as a memory, a hard disk, or an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

  Further, the control lines and the information lines are those that are considered necessary for the explanation, and not all the control lines and the information lines that are necessary for the mounting are shown. In practice, it can be considered that almost all the components are connected to each other.

11 Input / output device 12 GPS device 13 External storage device 14 Data access processing block 15 Memory device 16 Communication device 17 Update processing block 18 Overall control processing block 31 Terminal device 32 Network 33 Distribution server device 71 Communication device 72 External storage device 73 Data access Processing block 74 Memory device 75 Distribution data generation processing block 76 Overall control processing block

Claims (5)

A data update method in a data distribution system comprising a server device for distributing update data and a plurality of terminal devices for receiving update data distributed from the server device,
The server device has distribution means for distributing update data stored in the server device,
The terminal device includes a receiving unit that receives update data distributed from the server device, a memory that stores the received update data, and a storage unit that stores data to be updated.
In the method, the terminal device
Automatically determining when to update the data;
Determining the number of partitions to be updated according to the management unit specification, which is a grid separating map data stored in the storage means;
Obtaining update data of the determined update target area;
Updating the data on the memory using the acquired update data;
Determining whether the update of the data was successful;
Storing the updated data in the storage means;
Updating the version of the updated data;
And a step of discarding the acquired update data after the version update is completed. The data update method according to claim 1,
Data that is determined to be updated when the terminal device enters a road that passes for the first time by using location information of the terminal, and when the set destination is the first destination Update method. The data update method according to claim 2,
The terminal device is
Read the update target area data from the storage means, store in the memory,
Update the update target area data stored in the memory using the acquired update data,
A data update method, comprising: saving update data stored in the memory to the storage means when update processing fails. A data update system comprising a server device for distributing update data and a plurality of terminal devices for receiving update data distributed from the server device,
The server device has distribution means for distributing update data stored in the server device,
The terminal device includes a receiving unit that receives update data distributed from the server device, a memory that stores the received update data, and a storage unit that stores data to be updated.
The terminal device
Automatically determine when to update data,
Determining the number of partitions to be updated according to the management unit specification, which is a grid separating map data stored in the storage means
Obtaining update data of the determined update target area;
Update the data on the memory using the acquired update data,
Determine whether the data update was successful;
Storing the updated data in the storage means;
Update the version of the updated data,
A data update system, wherein after the update of the version is completed, the acquired update data is discarded. A terminal device that updates data with update data distributed from a server device,
Receiving means for receiving update data distributed from the server device;
A memory for storing the received update data;
Storage means for storing data to be updated,
The terminal device
Using the location information of the terminal, when entering the road that passes for the first time, and when the set destination is the first place to go, it is determined to update the data ,
Determining the number of partitions to be updated according to the management unit specification, which is a grid separating map data stored in the storage means
Obtaining update data of the determined update target area;
Update the data on the memory using the acquired update data,
Determine whether the data update was successful;
Storing the updated data in the storage means;
Update the version of the updated data,
A terminal device that discards the acquired update data after the version update is completed .