JP2004125509A - Map delivery apparatus and on-vehicle terminal apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a map update determining technology for determining the need or the lack of need for map update, without increasing load and costs required for the processing of an apparatus on the side of a motor vehicle. <P>SOLUTION: On the basis of conditions of route retrieval transmitted from the onboard apparatus 100, route retrieval is performed according to each map information of the version of map information stored in a map storage part 112 of the on-vehicle apparatus 100 and the version of the latest map information. When it is determined that there is no match for a recommended route, that map information is updated and is transmitted to the on-vehicle apparatus 100. After that, when it is determined that transmission of the latest map information is requested from the on-vehicle apparatus 100 to a delivery center 200, the latest map information is read from a map POI (point of interest) server 202 and it is transmitted to the on-vehicle apparatus 100. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a map distribution device that distributes map data by communication and an in-vehicle terminal device that receives map data from the distribution device.
[0002]
[Prior art]
As an in-vehicle information terminal device that receives map data through communication, those described in Patent Documents 1 and 2 are known. In the apparatus of Patent Document 1, when a user inputs an update area, a data type to be updated, and the like and requests an update request from the traffic information center, the traffic information center transmits update data. The device of Patent Document 2 aims to automatically receive update data. When an update area, data type, and update cycle are input, the update data is automatically transmitted from the master station to the slave station every time the update cycle is reached. . Alternatively, when the slave station obtains map data from the master station at the start of route guidance, the slave station compares the version with the designated area, and the slave station's data for the designated area is compared with the slave station data. Update map data.
[0003]
[Patent Document 1] JP-A-11-257975
[Patent Document 2] Japanese Unexamined Patent Publication No. 2000-36097
[0004]
[Problems to be solved by the invention]
In the prior art disclosed in Patent Document 2, it is necessary to install a processing program for determining whether or not map updating is necessary on the slave station side. In addition, it is necessary to start a program for determining whether or not map update is necessary each time a route is guided, which increases the processing load on the slave station and increases the cost.
[0005]
The present invention provides a map update determination technique for determining whether or not a map update is necessary without increasing the load and cost required for processing of equipment on the vehicle side.
[0006]
[Means for Solving the Problems]
The map distribution device according to the first aspect of the present invention provides a first route search calculation based on the latest map and a second route search calculation based on the map used for the vehicle that requested the route search in response to a route search request from the vehicle. And calculating means for acquiring route information and guidance information, and determining means for determining the necessity of updating the map used for the vehicle based on the results of the first and second route search calculations. It is characterized by.
When the determination means determines that a map update is required, the vehicle can be notified that a map update is necessary, and then an update map can be transmitted only after a map update request is transmitted from the vehicle side. Alternatively, when the determination unit determines that the map needs to be updated, the latest map may be transmitted to the vehicle suddenly.
The determination means may determine that the map used for the vehicle needs to be updated when the route information and / or the guidance information obtained by the first and second route search calculations do not match.
An in-vehicle terminal device according to a fifth aspect of the present invention includes a calculation unit that performs a search calculation of a route from the current location to a destination, and a transmission that transmits an inquiry about necessity of map update to the map distribution device when the search calculation is performed. And receiving means for receiving updated map data transmitted from the outside in response to an inquiry about whether or not map update is necessary. The in-vehicle terminal device preferably further includes storage means for storing the received update map data, and management means for managing the pre-update map data and the update map data.
Such an in-vehicle terminal device may further include setting means for setting either a mode in which an inquiry about necessity of map update is always transmitted or a mode in which a map is not always transmitted when a search calculation is performed. Alternatively, a mode for receiving updated map data transmitted from the map distribution device in response to an inquiry about whether or not a map update is required, and a map distribution device in response to an update map transmission request instructed after the update is notified A mode setting means for setting a mode for receiving an updated map transmitted from may be further provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
――― First embodiment ―――
1 to 19, a first embodiment in which an in-vehicle terminal device according to the present invention is applied to a car navigation device will be described. FIG. 1 shows a car navigation device according to a first embodiment (hereinafter referred to as an in-vehicle device 100), a distribution center 200 that distributes map information and route search information to the in-vehicle device 100, an in-vehicle device 100, and a distribution center 200. A mobile phone 150 and a mobile communication network 250 for transmitting and receiving various data to and from the mobile phone are shown. As shown in FIG. 1, the mobile phone 150 is connected to the in-vehicle device 100. The vehicle-mounted device 100 has a function of presenting information related to vehicle travel, specifically, a function of displaying a road map around the vehicle position, a function of calculating a recommended route from the departure point to the destination, and a calculated recommended route. It also has a function to perform route guidance based on the above. It is a device that performs so-called navigation or road guidance. Further, as will be described later, the in-vehicle device 100 can request the latest map information and the like of the distribution center 200 from the mobile phone 150 to the distribution center 200 via the mobile communication network 250. The mobile phone 150 can receive the latest map information transmitted from the distribution center 200 via the mobile communication network 250. Instead of the mobile phone 150, an in-vehicle phone, a communication LAN, or a communication device dedicated to the in-vehicle device may be used.
[0008]
FIG. 2 is a system block diagram showing the configuration of the in-vehicle device 100. In FIG. 2, reference numeral 111 denotes a current position detection device that detects the current position of the vehicle. For example, a direction sensor 111a that detects the traveling direction of the vehicle, a vehicle speed sensor 111b that detects the vehicle speed, and a GPS sensor 111c that detects a GPS signal from a GPS satellite. And a gyro sensor 111d for detecting a change in the traveling direction of the vehicle. A map storage unit 112 stores a nonvolatile semiconductor memory as a storage memory for storing the latest map information (also referred to as updated map data) received by the mobile phone 150, and road map data and address data before update. The recording medium is a DVD-ROM 113 and a reading device. The storage memory is not limited to a nonvolatile semiconductor memory, and may be a recordable storage device such as a hard disk. The recording medium is not limited to a DVD-ROM, and may be a magnetic tape, a CD-ROM, or any other recording medium. The road map data, address data, map information, and the like stored in the map storage unit 112 are hereinafter collectively referred to as “map information (of the vehicle-mounted device 100)”. As for the map information of this in-vehicle device 100, when the map is updated, the map information before and after the update is mixed. Therefore, as will be described later, an updated map management table for managing the update status of the map information is provided. A control circuit 114 controls the entire apparatus and includes a microprocessor and its peripheral circuits. The control circuit 114 executes a control program stored in the ROM 116 using the RAM 115 as a work area to perform various controls described later.
[0009]
Reference numeral 117 denotes an input device having switches for inputting a destination of the vehicle or the like or inputting various operations. Reference numeral 118 denotes an image memory for storing image data to be displayed on the display monitor 119. This image data is created from road map drawing data and various graphic data. The image data stored in the image memory 118 is appropriately read and displayed on the display monitor 119. The display monitor 119 displays route information and guidance information together with a road map. In this embodiment, the display screen of the display monitor 119 has a function as a touch panel switch.
[0010]
As will be described later, information received by the mobile phone 150 connected to the in-vehicle device 100 is temporarily stored in the RAM 115 and then appropriately stored in the image memory 118 for display on the display monitor 119. Further, the latest map information received from the distribution center 200 is temporarily stored in the RAM 115 and then stored as updated map data in the storage memory of the map storage unit 112.
[0011]
The car navigation device (on-vehicle device) 100 configured as described above performs various types of navigation based on the vehicle position information acquired by the current location detection device 111 and the map information stored in the map storage unit 112. For example, a road map in the vicinity of the vehicle position and the vehicle position are displayed on the display monitor 119, and the driver is guided along the route obtained by the route search. Further, as will be described later, an inquiry about the latest map information is made to the distribution center 200, and when there is map information newer than the map information of the in-vehicle device 100, the latest map information can be received from the distribution center 200. .
[0012]
In the distribution center 200 of FIG. 1, reference numeral 201 denotes a request reception server that receives vehicle position information from the in-vehicle device 100, a Car ID (vehicle identification number) that identifies a vehicle, and a map distribution request and executes the request. Reference numeral 202 denotes a map / POI server, which stores detailed road maps and POI information (information of points of interest tourist sites and various facilities) nationwide. Detailed road maps and POI information stored nationwide in the map / POI server 202 correspond to map meshes with version information corresponding to the newness of each information, from past information to the latest information. Stored. The map / POI server 202 outputs data to the request reception server 201 in response to a request from the request reception server 201.
[0013]
A request processing server 203 performs various calculations based on the map information stored in the map / POI server 202 in response to a request from the request receiving server 201, and outputs the calculation results to the request receiving server 201. The calculation executed by the request processing server 203 is for comparing the map information of the in-vehicle device 100 with the latest map information stored in the map / POI server 202, and for transmitting the latest map information to the in-vehicle device 100. For example, data processing. This will be described later.
[0014]
Reference numeral 204 denotes a customer DB server. The calculation result regarding the latest map information requested by the in-vehicle device 100 is once stored in the customer DB server 204 for each in-vehicle device 100 and then distributed to the in-vehicle device 100 through the request reception server 201. The in-vehicle device 100 is pre-assigned a Car ID that identifies the vehicle, and the customer DB server 204 updates the map information of the in-vehicle device 100 in the storage area assigned to the Car ID in units of meshes and meshes. Various information such as version information of map information is stored (see FIGS. 18 and 21).
[0015]
According to the above configuration, when an inquiry about the latest map information is transmitted from the in-vehicle device 100 together with information such as the Car ID to the distribution center 200, the distribution center 200 relates to the latest map information based on the information received from the in-vehicle device 100. An operation is performed. Then, as a result of the calculation in the distribution center 200, the presence / absence of map information newer than the map information of the in-vehicle device 100 (also referred to as map update necessity) is transmitted from the distribution center 200 to the in-vehicle device 100. The in-vehicle device 100 presents the calculation result of the distribution center 200 to the driver and confirms whether to receive new map information. The necessity / unnecessity of the new map information (updated map information) selected by the driver is transmitted to the distribution center 200. In the distribution center 200, when there is a new map information distribution request from the in-vehicle device 100, the latest map information is transmitted to the in-vehicle device 100. Thereafter, the vehicle-mounted device can guide the route of the vehicle based on the latest received map information. Hereinafter, processing executed in the in-vehicle device 100 and the distribution center 200 will be described in detail.
[0016]
――― Operation of in-vehicle device 100 ―――
The operation of the in-vehicle device 100 will be described with reference to FIGS. FIG. 3 is a flowchart showing the processing of the main routine of the program executed by the in-vehicle device 100. When the accessory key is turned ON by the ignition key (ACC ON), the vehicle-mounted device 100 is turned on and a program for performing the processing shown in FIG. 3 is started. The program shown in FIG. 3 is executed by the control circuit 114. In step S10, a subroutine for executing processing for displaying the current position of the vehicle on the display monitor 119 is executed. This subroutine will be described later. After the execution of the subroutine of step S10, the process proceeds to step S15, and it is determined whether or not an instruction to search for a route is given from the driver.
[0017]
If a negative determination is made in step S15, the process proceeds to step S30, and a subroutine for executing a process for displaying the current position of the vehicle, which changes as the vehicle moves, on the display monitor 119 is executed. This subroutine will be described later. If an affirmative determination is made in step S15, the process proceeds to step S20, and a subroutine for performing a route search calculation for guiding the vehicle to the route is executed. This subroutine will be described later.
[0018]
After execution of the subroutine of step S30, the process proceeds to step S40, and a subroutine for executing processing for determining whether or not to make an inquiry to the distribution center 200 regarding the latest map information is executed. This subroutine will be described later. After execution of the subroutine of step S40, the process returns to step S10 and the above-described operation is repeated.
[0019]
With the above-described processing, the in-vehicle device 100 superimposes the current position of the vehicle on the map information and displays it on the display monitor 119, and performs guidance processing based on the route search result.
[0020]
FIG. 4 is a flowchart showing a subroutine of step S20 in FIG. In this subroutine, the in-vehicle device 100 performs a route search operation for both the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information of the distribution center 200 for the distribution center 200 for the route search. Request. If the result of this calculation is different, the distribution center 200 notifies the vehicle-mounted device 100 that there is a newest map and needs to be updated. Thus, the driver can determine whether or not to request new map information from the distribution center regarding the mesh used in the route search calculation. Details will be described below.
[0021]
In step S201, the process waits until information necessary for route search such as a waypoint and a search condition is input by the input device 117 of the in-vehicle device 100. The departure place is the current position of the vehicle and is detected by the current position detection device 111. If it is determined in step S201 that necessary information has been input, the process proceeds to step S203, and a route search mode selection screen is displayed on the display monitor 119 as shown in FIG. Reference numeral 1 denotes a vehicle current position mark (own vehicle position mark). As shown in FIG. 5, a search button 5 and a server search button 6 are displayed below the display monitor 119. The search button 5 is a button (switch) for the driver to instruct a route search based on the map information of the in-vehicle device 100, and the server search button 6 corresponds to the map information stored in the in-vehicle device 100 in the distribution center 200. This is a button for instructing a route search using both the map information to be updated and the latest map information, and is a button for confirming whether or not the map information of the in-vehicle device 100 is out of date as will be described later. Note that the screen displayed in step S203 can display only the server search button 6 as shown in FIG. 6, or can display only the search button 5 as shown in FIG. The display screen in any of FIGS. 5-7 is determined by setting the mode of the vehicle equipment 100 beforehand.
[0022]
In step S205, it is determined whether or not the route search is performed by the in-vehicle device. That is, it is determined whether or not the search button 5 has been pressed. If an affirmative determination is made in step S205, the process proceeds to step S233, a route search is performed based on the map information of the in-vehicle device 100, and the process returns to the main routine. If a negative determination is made in step S205, the process proceeds to step S207 to determine whether or not the server search button 6 has been pressed. If a positive determination is made in step S207, the process proceeds to step S209. If a negative determination is made in step S207, the process returns to step S205. In step S209, the route search conditions input in step S201 are transmitted from the mobile phone 150 to the distribution center 200 together with the current position of the vehicle and the Car ID, and the process proceeds to step S211. As will be described later, when the distribution center 200 receives the information transmitted in step S209, the map version of the in-vehicle device 100 is specified based on the received Car ID. The map version may be in units of meshes or in units of data types in the mesh. As data types, road data including road position coordinates and road shape, node / link connection data indicating road connection state, background data and guidance data are used. Then, a route search is performed using both the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information, and the presence / absence of a difference in the search result is transmitted to the in-vehicle device 100. The search result includes recommended route data and guidance data. The in-vehicle device 100 stands by in step S211 until this result is received.
[0023]
If an affirmative determination is made in step S211, it is determined in step S213 whether or not there is a difference in the search results received in step S211 (whether or not they match). If it is determined that there is no difference in the search results received in step S211, that is, the two match, the process proceeds to step S231, and there is no updated map in the distribution center 200 (server) as shown in FIG. By displaying the effect, the driver is notified and the process proceeds to step S233. If it is determined in step S213 that there is a difference between the search results received in step S211, the process proceeds to step S215, and the yes button 7 and the no button 8 are displayed below the display monitor 119 as shown in FIG. . These buttons 7 and 8 are touch panel switches for causing the driver to select whether or not to update the map because there is an updated map in the distribution center 200.
[0024]
In step S217, it is determined whether or not there is an instruction to update the map information. That is, it is determined which of the yes button 7 and the no button 8 is pressed. If the determination in step S217 is negative, that is, if it is determined that the No button 8 has been pressed, the process proceeds to step S233. If the determination in step S217 is affirmative, that is, it is determined that the yes button 7 has been pressed, the process proceeds to step S219. In step S219, the distribution center 200 is requested to transmit the latest map information regarding a plurality of meshes used by the distribution center 200 in the route search calculation, for example, a plurality of meshes through which a recommended route from the departure point to the destination passes. To do. The latest map information may be similarly requested for a mesh that has been used in the calculation process but does not pass through the recommended route. In step S221, the process waits until the latest map information requested in step S219 is received. If it is determined in step S221 that the latest map information has been received, the process proceeds to step S223, and the latest map information received in step S221 is stored in the semiconductor storage memory of the map storage unit 112 for the plurality of meshes. If the map information of the corresponding mesh already exists in this storage memory, it is overwritten with the latest map information. If the map information of the corresponding mesh does not exist in the storage memory, it is newly stored. Although detailed explanation is omitted, when the map information received from the distribution center 200 exists in the storage memory, the old map information is not read from the DVD-ROM 113 for the mesh stored in the storage memory. Therefore, an updated map management table is provided in the map storage unit 112. The updated map management table has a structure that can specify the latest mesh or the latest data in the mesh, for example. In step S225, as shown in FIG. 10, the display monitor 119 displays an update of map information, performs a route search based on the updated map information, and returns to the main routine.
[0025]
FIG. 11 is a flowchart showing a subroutine of step S30 in FIG. In this subroutine, the current position of the vehicle that changes due to traveling is superimposed on the map information and displayed on the display monitor 119, and guidance processing is performed based on the result of the route search calculation. In step S301, the current position detection device 111 detects the current position of the vehicle, and the process proceeds to step S303. In step S303, the map information stored in the map storage unit 112 is read into the RAM 115, and the process proceeds to step S305. That is, a predetermined number of meshes around the current location are specified, and the latest map data is developed in the RAM 115 using the updated map management table described above. Then, a road map is displayed on the display monitor 119. In step S305, a map matching process for displaying the current position of the vehicle detected in step S301 on the road included in the map information read in step S303 is performed. This subroutine will be described later. In step S307, the current position of the vehicle corrected by performing the subroutine of step S305 is superimposed on the map information read in step S303, displayed on the display monitor 119, and the process proceeds to step S309.
[0026]
In step S309, it is determined whether there is a result of the route search calculation executed in step S20 of the main routine. That is, it is determined whether the route is being guided. If an affirmative determination is made in step S309, the process proceeds to step S311 to determine whether or not the guidance point is approaching. If an affirmative determination is made in step S311, the process proceeds to step S313, guidance processing, that is, guidance display or voice guidance is performed based on the result of the route search calculation executed in step S20 of the main routine, and the process proceeds to step S315. Further, even if a negative determination is made in step S309 or step S311, the process proceeds to step S315. In step S315, it is determined whether or not the vehicle has traveled a certain distance. If a positive determination is made in step S315, the process returns to the main routine, and if a negative determination is made, the process returns to step S315.
[0027]
FIG. 12 is a flowchart showing a subroutine for performing the map matching process executed in step S305 of FIG. In step S351, based on the current position of the vehicle detected in step S301 in FIG. 11, road candidates for map matching are extracted from the map information read in step S303. In step S353, map matching processing is performed on the road extracted in step S351, and it is determined whether there is a road that can be used for map matching. Since the map matching process executed in step S353 is a conventionally known process, a detailed description thereof is omitted, but is generally the following process. Search is made for road data that matches the driving situation, for example, the driving direction of the host vehicle. When matching road data exists, map matching is performed, and when there is no matching road data, a free driving state is set. If a positive determination is made in step S353, in step S355, the current position of the vehicle detected in step S301 is corrected based on the result of the map matching executed in step S353, and the process returns to the main routine. If a negative determination is made in step S353, the current position of the vehicle detected in step S301 is not corrected, a flag indicating a free running state in which map matching is not performed is set, and the process returns to the main routine.
[0028]
FIG. 13 is a flowchart showing a subroutine of step S40 in FIG. In this subroutine, when the free-running state satisfies a certain condition, that is, when there is a possibility of traveling on a new road that is not included in the map information of the vehicle-mounted device 100, the latest distribution center 200 has The distribution center 200 is requested to compare the map information with the map information corresponding to the map information stored in the in-vehicle device 100. When the result of the comparison at the distribution center 200 is received and the map information is updated, the map information of the vehicle-mounted device can be updated with the latest map information at the user's discretion.
[0029]
In step S401, as a result of executing the map matching processing subroutine shown in FIG. 12 (subroutine in step S305 in FIG. 11), it is determined whether or not there is a free running state, that is, whether or not there is a flag indicating the free running state. . If an affirmative determination is made in step S401 (with a free running flag), the process proceeds to step S403, where it is determined whether the current position of the vehicle is in a service area such as an expressway or a parking area, or in the vicinity thereof. That is, it is determined whether or not the host vehicle is located at a point related to these areas. If a negative determination is made in step S403, the process proceeds to step S405 to determine whether or not the vehicle is turning. If a negative determination is made in step S405, the process proceeds to step S407, where it is determined whether map matching is not performed and the free running state continues for a certain time or more. That is, it is determined whether or not the flag indicating the free running state is continuously set for a predetermined time or more.
[0030]
When an affirmative determination is made in step S407, the process proceeds to step S409, and the mesh number of the map information in the vicinity including the position where the vehicle is currently traveling is transmitted from the mobile phone 150 to the distribution center 200 together with the Car ID. As will be described later, the distribution center 200 has map information corresponding to the map information stored in the vehicle-mounted device 100 determined from the Car ID and the distribution center 200 regarding the map information of the mesh including the position where the vehicle is currently traveling. Is compared with the latest map information and the result is transmitted to the in-vehicle device 100. The in-vehicle device 100 stands by in step S411 until the comparison result is received. This comparison is preferably performed for each type of map data such as road data, background data, and POI data, and updated for each data type. If any data is updated in comparison in units of meshes, the mesh may be recognized as an updated mesh. In step S413, it is determined from the comparison result received in step S411 whether the map information is updated. If an affirmative decision is made in step S413, the driver is notified in step S415 by displaying that there is new map data on the display monitor 119 as shown in FIG. 14, and then the process proceeds to step S417. FIG. 14 shows that the marker 1 indicating the current position of the vehicle is out of the road 10 displayed on the display monitor 119 and the road is not displayed because the map information of the in-vehicle device 100 is old. It is an example.
[0031]
In step S417, the process waits until receiving the update status display data transmitted by the distribution center 200 in order to present the update status to the driver. If it is determined in step S417 that the update status display data has been received, the received data is temporarily stored in the RAM 115 and the process proceeds to step S419. As shown in FIG. And is displayed on the display monitor 119. As will be described later, the update status display data received by the in-vehicle device 100 is compared in the distribution center 200 with the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information held in the distribution center 200. Therefore, it is data for simple display created in order to present new information that is not included in the map information of the in-vehicle device 100 to the driver in an easy-to-understand manner. FIG. 15 is an example showing a state in which marks 22 indicating new roads 20 and 21 and new facilities not included in the map information of the in-vehicle device 100 are displayed on the display monitor 119 in a simple manner superimposed on the map information of the in-vehicle device. A yes button 23 and a no button 24 are displayed below the display monitor 119 shown in FIG. These buttons 23 and 24 are touch panel switches for causing the driver to select whether or not to receive the latest map information that the distribution center 200 has.
[0032]
In step S421, it is determined which of the yes button 23 and the no button 24 shown in FIG. 15 has been pressed, and it is determined whether or not there has been an update instruction from the driver. If the determination in step S421 is affirmative, that is, it is determined that the yes button 23 has been pressed, the process proceeds to step S423, and a request for transmitting the latest map information is transmitted to the distribution center 200 along with the Car ID for the mesh including the current position of the vehicle. To do. In step S425, the process waits until the latest map information transmitted from the distribution center 200 is received. If it is determined in step S425 that the latest map information has been received and stored in the RAM 115, the process proceeds to step S427, and the latest map information received in step S425 and stored in the RAM 115 for the mesh including the current position of the vehicle. Is stored in the storage memory of the map storage unit 112 and the process returns to the main routine. When this subroutine is finished and the process returns to the main routine, the update status display data and the update map data temporarily stored in the RAM 115 are deleted.
[0033]
If the following is true, the process in the subroutine of FIG. 13 is terminated and the process returns to the main routine.
(1) When a negative determination is made in any of steps S401, S407, S413, and S421
(2) When a positive determination is made at step S403 or step S405
[0034]
――― First embodiment: Summary of operation of in-vehicle device 100 ―――
The in-vehicle device 100 according to the first embodiment described above can perform various types of navigation. When the route search is performed, the route search can be executed by both the map information corresponding to the map information stored in the vehicle-mounted device 100 and the latest map information in the distribution center 200. When it is determined that the route search results of the distribution center 200 are different, the distribution center 200 can be requested to distribute the latest map information by selecting a driver. Then, based on the latest map information received from the distribution center 200, a route search calculation can be performed by the in-vehicle device 100 to guide the route. A search result based on the latest map of the distribution center 200 may be transmitted to the in-vehicle device 100 through communication, and route guidance may be performed based on the search result.
[0035]
In addition, when the vehicle-mounted device 100 continues in a free-running state in which map matching is not performed during traveling, the map information corresponding to the map information stored in the vehicle-mounted device 100 and the distribution center 200 for the mesh including the current position of the vehicle. The distribution center 200 is requested to compare the latest map information of However, at the next location, since the vehicle is likely to be in a free running state by turning the vehicle, no request is made to the distribution center 200.
(1) Within a service area such as an expressway or within a parking area or nearby
(2) When the vehicle is clearly turning
As a result of comparison at the distribution center 200, if the map has been updated for the mesh including the current position of the vehicle, the update status display data is superimposed on the map information of the in-vehicle device and displayed on the display monitor 119, to the driver. Determine if update is necessary. When there is an update instruction from the driver, the driver requests transmission of the latest map information. Then, the latest received map information is stored in the semiconductor storage memory of the map storage unit 112, and this map information is used thereafter.
[0036]
――― Operation of Distribution Center 200 ――――
The operation of the distribution center 200 will be described with reference to FIGS. FIG. 16 is a flowchart showing processing of a main routine of a program executed by the request reception server 201 of the distribution center 200. In step S51, the process waits until data transmitted from the in-vehicle device 100 is received. If it is determined that the data transmitted from the in-vehicle device 100 is received in step S51, the process proceeds to step S53, and the map information corresponding to the map information stored in the in-vehicle device 100 is included in the data transmitted from the in-vehicle device 100. It is determined whether or not a request for comparing old and new is included for a predetermined mesh. If an affirmative determination is made in step S53, the process proceeds to step S60, and a request is issued to the request processing server 203 to perform an operation for comparing old and new with respect to a predetermined mesh of map information corresponding to the map information stored in the in-vehicle device 100 ( Instructions). If a negative determination is made in step S53, the process proceeds to step S55. In step S <b> 55, the data transmitted from the in-vehicle device 100 includes a request for comparing the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information by performing route search calculation. Judge whether or not. The new and old map information is stored in the map / POI server 202. If a positive determination is made in step S55, the process proceeds to step S70. In step S <b> 70, the request processing server 203 is requested (instructed) to perform a route search calculation on the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information for comparison. . When a negative determination is made in step S55, a series of operations for making a request (instruction) to the request processing server 203 ends.
[0037]
FIG. 17 is a flowchart showing the processing of the program executed in step S60 of FIG. In step S601, from the Car ID and the mesh number transmitted from the in-vehicle device 100, the version of the latest map information on the in-vehicle device side at that time stored in the map storage unit 112 of the in-vehicle device 100 for the mesh, The customer DB server 204 is inquired. When the map has never been updated, the version of the DVD-ROM 113 is used, but after the update is performed, the version of the map mesh stored in the storage memory of the map storage unit 112 is obtained. In step S603, the version of the map mesh inquired in step S601 is compared with the latest map mesh version stored in the map / POI server 202, and the process advances to step S605. In step S605, it is determined that there is a difference in the result compared in step S603, that is, the latest map information of the distribution center 200 is updated with respect to the map information corresponding to the map information stored in the in-vehicle device 100. Then, it progresses to step S607, instruct | indicates to the request | requirement reception server 201 to transmit that the map information is updated to the vehicle equipment 100, and progresses to step S609.
[0038]
In step S609, update status display data for informing the driver of the update status is created. This update status display data is created by comparing both the latest version of the map information stored in the map / POI server 202 and the version of the map information corresponding to the map information stored in the in-vehicle device 100. The The update status display data includes information on roads, facilities, traffic regulations, and the like that are in the latest map mesh version but not in the map mesh version of the in-vehicle device 100 on the display monitor 119 of the in-vehicle device 100 together with the map information. It is data that can be displayed superimposed.
[0039]
In step S611, the request reception server 201 is instructed to transmit the update status display data created in step S609 to the in-vehicle device 100, and the process proceeds to step S613. In step S613, it is determined whether there is a request for transmitting the latest map information from the in-vehicle device 100 to the distribution center 200. If a positive determination is made in step S613, the process proceeds to step S615. In step S615, the request reception server 201 is instructed to read out the latest map information from the map / POI server 202 and transmit it to the in-vehicle device 100 for the mesh requested to be compared. Further, the mesh number and version of the latest map information to be transmitted to the in-vehicle device 100 are stored in the customer DB server, and the process is terminated. FIG. 18 is a diagram illustrating an example of data stored in the customer DB server 204. A mesh number and version information of the mesh are stored for each Car ID.
[0040]
If a negative determination is made in step S605, the process proceeds to step S617 to instruct the request receiving server 201 to transmit to the in-vehicle device 100 that the map information has not been updated, and the process is terminated. If the determination at step S613 is negative, the process is terminated.
[0041]
FIG. 19 is a flowchart showing the processing of the program executed in step S70 of FIG. In step S701, based on the route search conditions transmitted from the in-vehicle device 100, an area (mesh) of map information used in the route search is determined, and the process proceeds to step S703. In step S703, the version of the map information stored in the map storage unit 112 of the in-vehicle device 100 and the latest version of the map information for the mesh of the map information used in the route search from the Car ID transmitted from the in-vehicle device 100. Are compared with the customer DB server 204.
[0042]
In step S705, it is determined whether there is an updated mesh as a result of comparing the versions of the meshes in step S703. If an affirmative determination is made in step S705, the process proceeds to step S707, and a route search is executed based on the map information of the version corresponding to the map information stored in the map storage unit 112 of the in-vehicle device 100 and the version of the latest map information. Then, the process proceeds to step S709. The version of the map information stored in the map storage unit 112 of the in-vehicle device 100 is the version of the DVD-ROM 113 when the map update has never been performed, but after the update is performed, This is a version of each map mesh stored in the storage memory of the map storage unit 112. In step S709, it is determined whether or not the recommended routes match based on the two route search results executed in step S707. If the determination in step S709 is negative, that is, it is determined that the recommended routes do not match, in step S711, the request reception server 201 is instructed to transmit to the in-vehicle device 100 that the map information has been updated, and the flow advances to step S713. move on. In step S713, it is determined whether there is a request for transmitting the latest map information from the in-vehicle device 100 to the distribution center 200. If an affirmative determination is made in step S713, in step S715, the request reception server 201 is instructed to read the latest map information from the map / POI server 202 and transmit it to the in-vehicle device 100 regarding the mesh for which the route search has been performed. Further, the mesh number and version of the latest map information to be transmitted to the in-vehicle device 100 are stored in the customer DB server, and the process is terminated.
[0043]
If a positive determination is made in step S709, the process proceeds to step S721, and it is determined whether or not the guidance data is updated based on the two route search results executed in step S707. If a positive determination is made in step S721, the process proceeds to step S711. If a negative determination is made in step S721 or a negative determination is made in step S705, the process advances to step S723 to instruct the request reception server 201 to transmit to the in-vehicle device 100 that the map information has not been updated, and the process ends. . Note that the route search result information obtained by the above-described route search calculation includes route data (recommended route) and guidance data.
[0044]
――― First embodiment: Summary of operation of distribution center 200 ―――
In the distribution center 200 of the first embodiment described above, in response to a request from the in-vehicle device 100, the map information corresponding to the map information stored in the in-vehicle device 100 is compared with the latest map information and updated. If it is, the in-vehicle device 100 is notified that it has been updated. And according to the transmission request from the vehicle equipment 100, the newest map information can be transmitted to the vehicle equipment 100. Further, the distribution center 200 stores and manages the version of the map information stored in the map storage unit 112 of the in-vehicle device 100 in the customer DB server 204 for each Car ID. When the latest map information is transmitted from the distribution center 200 to the vehicle-mounted device 100, the transmitted mesh number and version are stored in the customer DB server 204 (see FIG. 18).
[0045]
The car navigation device according to the first embodiment described above has the following effects.
(1) The in-vehicle device 100 requests the distribution center 200 to perform a route search calculation using both the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information of the distribution center 200. The necessity of map update is determined based on the result of the route search calculation executed at the distribution center 200. Therefore, it is not necessary to make the device configuration of the in-vehicle device 100 large-scale, and without incurring an increase in processing time during route guidance, it is determined whether map update is necessary, and updated map information is distributed as necessary. It can be received from the center 200. In addition, since the route search is performed by the in-vehicle device 100 based on the received updated map information, the route of the vehicle can be efficiently guided.
(2) Since the updated map management table is provided in the map storage unit 112 of the in-vehicle device 100, the map information received from the distribution center 200 and stored in the storage memory and the pre-update stored in the DVD-ROM 113 are stored. The latest data can be used from the map information, and accurate route search and display can be performed.
(3) The route search mode selection screen is displayed on the display monitor 119. Whether the distribution center 200 instructs the route search using both the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information of the distribution center 200, or the route information is instructed by the map information of the in-vehicle device 100. Can be selected at the discretion of the driver, so an efficient route search can be performed.
(4) The route search mode can be determined by setting the mode of the in-vehicle device 100 in advance. For example, immediately after purchasing the in-vehicle device 100 or immediately after updating all the map information of the whole country, the distribution center 200 is inquired unnecessarily by setting only the search button 5 in the in-vehicle device 100 to be displayed. Can be prevented. This is effective in reducing communication costs and reducing the burden on each server in the distribution center 200. In addition, when the map information of the in-vehicle device 100 is out of date, the distribution center 200 is inquired by setting only the server search button 6 to display the map information of the in-vehicle device 100 obsolete. Inappropriate route guidance due to the conversion to the system can be prevented.
(5) Since the map update request is made to the distribution center 200 based on the traveling situation determined by the in-vehicle device 100, the troublesomeness of the map update is eliminated, and it is ensured without special operations such as route search. In addition, a map update request can be automatically made.
(6) By using a free running state based on map matching as the running state and determining whether or not to request a map update to the distribution center 200 based on the presence or absence of the running state, it is not necessary to newly use a map update determination algorithm. In this case, since the inquiry is not made to the distribution center 200 when the vehicle is located at a point related to the service area or the parking area, the reliability of the map update determination is also improved. Furthermore, since it is possible to prevent the inquiry to the distribution center 200 unnecessarily, the communication time and the communication cost can be reduced, and the burden on each server of the distribution center 200 can be reduced.
(7) As a result of the map comparison at the distribution center 200, when there is an update on the mesh including the current position of the vehicle, the update status display data is superimposed on the map information of the in-vehicle device 100 and displayed on the display monitor 119. A simple display is provided. As a result, the driver can easily determine whether the update is necessary. Also, only when the driver determines that it is necessary, it can request the distribution center 200 to transmit the latest map information, which is effective in reducing communication costs and reducing the burden on each server in the distribution center 200.
(8) The distribution center 200 only needs to compare the new and old map information for the necessary meshes in response to an inquiry from the in-vehicle device 100, so that the calculation load performed in the distribution center 200 can be reduced.
(9) When the distribution center 200 transmits information to the in-vehicle device 100 in response to an inquiry from the in-vehicle device 100, first, the data capacity such as data indicating that the map information has been updated and update status display data is stored. Send less data. The updated map information is transmitted only when there is a request from the in-vehicle device 100 side. Thereby, transmission / reception of unnecessary data can be prevented, the communication cost of each of the in-vehicle device 100 and the distribution center 200 can be reduced, and the burden on each server of the distribution center 200 can be reduced.
[0046]
――― Second embodiment ―――
A second embodiment of the present invention will be described with reference to FIGS. When the distribution center 200 according to the second embodiment receives a request from the in-vehicle device 100 to compare the map information corresponding to the map information stored in the in-vehicle device 100 and the latest map information of the distribution center 200, The latest map information corresponding to the map information stored in the in-vehicle device 100 is compared with the latest map information of the distribution center 200. Further, the update status display data created in the distribution center 200 is appropriately displayed in a display form according to the scale ratio, the running / stopped state of the vehicle, and the like when displayed on the display monitor 119 of the in-vehicle device 100. It is possible data. The in-vehicle device 100 according to the second embodiment displays the update status display data transmitted from the distribution center 200 in accordance with the scale ratio, the running / stopped state of the vehicle, and the like. The latest map information can be requested from the distribution center 200 for the mesh.
[0047]
――― Operation of Distribution Center 200 ――――
First, the operation of the distribution center 200 according to the second embodiment will be described. As described above, the difference between the first embodiment and the second embodiment in the distribution center 200 is a comparison range of old and new map information, a display form of update status display data to be created, and the like. Since other operations are the same as those in the first embodiment, the description thereof is omitted.
[0048]
FIG. 20 is a flowchart showing the processing of the program executed in step S60 of FIG. In step S1601, from the Car ID transmitted from the in-vehicle device 100, the version of the latest map information on the in-vehicle device side stored in the map storage unit 112 of the in-vehicle device 100 is changed to all the data of all meshes. The customer DB server 204 is inquired about the type. In step S1603, the version of each mesh inquired in step S1601 is compared with the latest version of each mesh stored in the map / POI server 202, and the process advances to step S1605. In step S1605, it is determined that there is a difference in the result of comparison in step S1603, that is, there is a mesh updated with respect to the map information corresponding to the latest map information on the in-vehicle device stored in the in-vehicle device 100. Then, the process proceeds to step S1607. In step S1607, the request reception server 201 is instructed to transmit to the in-vehicle device 100 that the map information is updated, and the process advances to step S1609.
[0049]
In step S1609, update status display data for informing the driver of the update status of the mesh that has been updated as a result of the comparison in step S1603 is created. This update status display data is created by comparing both the latest version of the map information stored in the map / POI server 202 and the version of the map information corresponding to the map information stored in the in-vehicle device 100. The The update status display data includes information on roads, facilities, traffic regulations, etc. that are in the latest map mesh version but not in the map mesh version corresponding to the map information stored in the in-vehicle device 100. This is data that can be displayed superimposed on the display monitor 119 together with the map information, and will be described together with the operation of the vehicle-mounted device 100 described in detail later. FIG. 21 is a diagram illustrating an example of data stored in the customer DB server 204 in the second embodiment. A mesh number is stored for each Car ID, and version information is stored for each data item (type) such as road data, background data, and guidance data corresponding to each mesh number.
[0050]
In step S1611, the request reception server 201 is instructed to transmit the update status display data created in step S1609 to the in-vehicle device 100, and the process proceeds to step S1613. In step S1613, it is determined whether or not there is a request for transmitting the latest map information from the in-vehicle device 100 to the distribution center 200. If an affirmative determination is made in step S1613, the process proceeds to step S1615, and the latest map information is updated to the map / POI for all information included in the mesh requested to be updated or information on some items selected by the driver. The request reception server 201 is instructed to read from the server 202 and transmit to the in-vehicle device 100. Further, the mesh number and version of the latest map information to be transmitted to the in-vehicle device 100 and the transmitted item are stored in the customer DB server, and the process is terminated.
[0051]
If a negative determination is made in step S1605, the process proceeds to step S1617, where the request receiving server 201 is instructed to transmit to the in-vehicle device 100 that the map information has not been updated, and the process ends. If step S1613 is negatively determined, the process ends.
[0052]
――― Operation of in-vehicle device 100 ―――
Next, the operation of the in-vehicle device 100 according to the second embodiment will be described. The difference between the first embodiment and the second embodiment is the update status display data display mode described below and the area (mesh) determination method for requesting the distribution center 200 to transmit the latest map information. is there. Since other operations are the same as those in the first embodiment, the description thereof is omitted.
[0053]
FIG. 22 is an example of a display screen when the update status display data transmitted from the distribution center 200 described above is displayed on the display monitor 119 of the in-vehicle device 100, and is shown in FIG. 13 of the first embodiment. This corresponds to step S419 in the flowchart. As shown in FIG. 22, in the case of a screen display that displays the entire country of Japan with a small scale ratio, an asterisk icon 50 is displayed at a predetermined position corresponding to the updated mesh. If the scale ratio is increased from this state, for example, when the scale is set such that the entire Kanto region is displayed on the display monitor 119, the icon 50 disappears and is updated as shown in FIGS. Existing meshes and updated meshes that have been received in the past are displayed with the background color changed.
[0054]
When the scale ratio is further increased from the state of FIG. 24 and is updated so that one updated mesh is displayed on the entire surface of the display monitor 119, it is updated as shown in FIG. Displayed. For example, a new road 61 is displayed, and a new facility is displayed with an icon 62. The updated part is easier to distinguish from the part that has not been updated, such as brighter or blinking than the part that has not been updated. In addition, the lost facility is displayed with a light gray icon 63 so that it can be distinguished from the newly made facility. In FIGS. 23 to 25, the update button 60 is displayed at the lower right of the screen of the display monitor 119. When the driver presses the update button 60, the update area selection mode is set.
[0055]
In the update area selection mode, as shown in FIG. 26, the scale is displayed such that a plurality of updated meshes are displayed. At this time, the driver can select a plurality of meshes of the latest map information received from the distribution center 200 by the input device 117 of the in-vehicle device 100. The part in which the frame of the mesh of FIG. 26 is drawn thickly shows the selected mesh. After the mesh of the latest map information received from the distribution center 200 is selected, when the determination button 65 displayed on the lower right of the display monitor 119 is pressed, the latest map information is transmitted for the selected mesh. The distribution center 200 is requested to do so. This operation corresponds to step S423 in the flowchart shown in FIG. 13 of the first embodiment. Thereafter, the latest map information transmitted from the distribution center 200 is stored as the map information of the vehicle-mounted device 100, but the description is omitted because it is the same operation as the first embodiment.
[0056]
――― Display example of update status display data ――――
In FIG. 25 described above, the updated content displays a new road or a new facility with an icon or the like. FIG. 27 shows an example in which a description display is added to the display of FIG. For example, information 66 on the scheduled opening date of a store scheduled to be opened or information 67 on the toll on a newly opened toll road may be displayed simultaneously as additional information. Further, it may be detected that the vehicle is stopped from the operation of the parking brake of the vehicle or the vehicle speed signal, and the update information content as shown in FIG. In this list display, the volume of update such as guidance information that is not normally displayed on the map screen, or the degree of update that is not easily understood only by displaying the information of the point or icon that is not displayed depending on the scale of the map displayed on the display monitor 119, It can be presented clearly by displaying it in letters. In addition, as shown in FIG. 29, this list display may be provided with an update button 70 for each type so that it can be updated individually according to the type of update content. In this case, the in-vehicle device 100 requests the distribution center 200 only for information on items corresponding to the pressed update button 70. FIG. 29 shows a case where road data, background data, and facility data are included as map information.
[0057]
In the car navigation apparatus of the second embodiment described above, the following functions and effects are provided in addition to the functions and effects of the first embodiment.
(1) When there is an inquiry from the in-vehicle device 100, the distribution center 200 compares the latest map information corresponding to the map information stored in the in-vehicle device 100 with the latest map information of the distribution center 200. Send the update status to the in-vehicle device. In addition, the latest map information can be transmitted for a plurality of areas designated by the driver who has confirmed the update status. As a result, the driver can grasp the update status of the map information in the whole country and can receive the latest map information for the map information of a plurality of areas determined to be necessary. Can be updated.
(2) When the update status display data created in the distribution center 200 is displayed on the display monitor 119 of the in-vehicle device 100, the update status display data can be displayed in a display form corresponding to the scale ratio or the running / stopping state of the vehicle. Data. The driver can grasp the update contents of the map information from various aspects by the update status display data in which the presence / absence of the update and the contents are appropriately displayed according to the scale ratio. Thus, the map information that the driver really wants to update can be received efficiently.
(3) The update status display data displayed on the display monitor 119 of the in-vehicle device 100 is data that can be displayed in a display form corresponding to the scale ratio, the traveling / stopping state of the vehicle, and the like. This enables safe vehicle travel.
[0058]
――― Modifications ――――
In the first embodiment described above, when the free-running state satisfies a certain condition, the distribution center 200 compares the map information with the new and old only for the mesh including the current position of the vehicle. However, the present invention is not limited to this. For the mesh around the mesh including the current position of the vehicle, the distribution center 200 may compare the map information with the new and old. Conversely, in the second embodiment described above, the distribution center 200 compares the map information with the new and old for all meshes of the map information corresponding to the map information stored in the in-vehicle device 100. The present invention is not limited to this. For example, when the vehicle is traveling in Tokyo, the distribution center 200 may compare the map information with the new and old for meshes including Tokyo and each prefecture adjacent to Tokyo. In addition, when the free running state satisfies a certain condition, the distribution center 200 may set in advance a range for comparing the new and old map information with the in-vehicle device 100. The information may be set not to be compared. In particular, the latter function can prevent unnecessary inquiries from the distribution center 200 immediately after purchasing the vehicle-mounted device 100 or immediately after updating all the map information of the whole country. Effective in reducing the load on the server.
[0059]
In the above description, in the subroutine of step S40 in the flowchart shown in FIG. 3, even if the vehicle is in a free running state, the current position of the vehicle is in a service area such as a highway, in a parking area, or in the vicinity thereof, When it is determined that the vehicle is turning, the distribution center 200 is not requested to compare the latest map information of the distribution center 200 with the map information corresponding to the map information stored in the in-vehicle device 100. However, this is not a limitation. A request for comparison is made to the distribution center 200 after the free-running state continues for a predetermined time. If the current position of the vehicle is in a service area such as an expressway or in a parking area or in the vicinity thereof, it is set. The request may be delayed by changing (longening) the predetermined time. A predetermined distance may be used instead of the predetermined time.
[0060]
In the above description, the route search is performed by the distribution center 200 using the version mesh corresponding to the map information of the in-vehicle device 100 and the latest map information mesh, but the present invention is not limited to this. The in-vehicle device 100 performs route search using its own map, and the distribution center 200 performs route search based on the latest map information. Then, among the route search results, the route search result of either the in-vehicle device 100 or the distribution center 200 is transmitted to the other, and the other side is compared to determine whether or not the map information is updated. It may be.
[0061]
In the above description, after the distribution center 200 notifies the vehicle-mounted device 100 that the latest map is present and needs to be updated, the distribution center 200 sends the latest map to the vehicle-mounted device 100 when a request for distribution of the latest map is received. Although the latest map information is transmitted, the present invention is not limited to this. When the distribution center 200 determines that the update is necessary, the latest map information may be transmitted to the in-vehicle device 100 without notifying the in-vehicle device 100 that the update is necessary.
[0062]
In the above description, the information transmitted from the distribution center 200 is displayed on the display monitor 119 to notify the driver, but the present invention is not limited to this. You may make it alert | report by an audio | voice and you may make it alert | report by an audio | voice with a display. Moreover, you may combine each embodiment and modification which were mentioned above, respectively.
[0063]
In the above embodiment and its modifications, the calculation means and the determination means that perform the first route search calculation and the second route search calculation to acquire route information and guidance information correspond to the request processing server 203. . The transmission means for transmitting the latest map to the vehicle corresponds to the request reception server 201. Storage means and management means correspond to the map storage unit 112. The notification means includes a request reception server 201 and a request processing server 203. The calculation means, the setting means, and the mode setting means for searching for a route from the current location to the destination are realized by a program executed by the control circuit 114 and the input device 117. The transmission means and the reception means for transmitting an inquiry about the necessity of map update are realized by a program executed by the control circuit 114 and the mobile phone 150. As long as the characteristic functions of the present invention are not impaired, the present invention is not limited to the device configuration in the above-described embodiment.
[0064]
【The invention's effect】
According to the present invention, in response to a route search request from a vehicle, the map distribution device performs a first route search calculation based on the latest map and a second route search calculation based on a map used in the vehicle. Since the necessity of map update is determined based on the result of the route search calculation, there is no need to make the device configuration on the vehicle-mounted device side large and the processing time at the time of route guidance is not increased. Thus, it is possible to provide a device that can determine whether or not map update is necessary and exchange the updated map.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a first embodiment in which an in-vehicle terminal device according to the present invention is applied to a car navigation device.
FIG. 2 is a system block diagram of the in-vehicle device 100 according to the first embodiment.
FIG. 3 is a flowchart showing processing of a main routine of a program executed by the in-vehicle device 100 of FIG.
4 is a flowchart showing a subroutine of step S20 in the flowchart shown in FIG.
5 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a route search mode selection screen. FIG.
6 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a screen on which only a server search button 6 is displayed among buttons for selecting a route search mode.
7 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a screen on which only a search button 5 is displayed among buttons for selecting a route search mode.
8 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing the display screen in step S231 in the flowchart shown in FIG.
9 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a display screen in step S215 in the flowchart shown in FIG.
10 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing a display screen in step S225 in the flowchart shown in FIG.
11 is a flowchart showing a subroutine of step S30 in the flowchart shown in FIG.
12 is a flowchart showing a subroutine of step S305 for performing map matching processing in the flowchart shown in FIG.
FIG. 13 is a flowchart showing a subroutine of step S40 in the flowchart shown in FIG. 3;
14 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing the display screen in step S415 in the flowchart shown in FIG.
15 is an example of a screen displayed on the display monitor 119 of the in-vehicle device 100 in FIG. 2, and is a diagram showing the display screen in step S419 in the flowchart shown in FIG.
16 is a flowchart showing processing of a main routine of a program executed by the request reception server 201 of the distribution center 200 in FIG.
17 is a flowchart showing processing of a program executed by the request processing server 203 of the distribution center 200 of FIG.
18 is a diagram showing an example of data stored in a customer DB server 204 of the distribution center 200 in FIG.
FIG. 19 is a flowchart showing processing of a program executed by the request processing server 203 of the distribution center 200 of FIG.
FIG. 20 is a flowchart illustrating processing of a program executed by the request processing server 203 according to the second embodiment.
FIG. 21 is a diagram showing an example of data stored in a customer DB server 204 in the second embodiment.
22 is an example of a screen displayed on the display monitor 119 in the in-vehicle device 100 according to the second embodiment, and is a diagram showing a display screen for update status display data transmitted from the distribution center 200. FIG.
23 is an example of a screen displayed on the display monitor 119 in the in-vehicle device 100 according to the second embodiment, and is a diagram showing a display screen when the scale ratio of FIG. 22 is changed.
24 is an example of a screen displayed on the display monitor 119 in the vehicle-mounted device 100 according to the second embodiment, and is a diagram showing a display screen when the scale ratio of FIG. 23 is changed.
FIG. 25 is an example of a screen displayed on the display monitor 119 in the in-vehicle device 100 of the second embodiment, and is a diagram showing a display screen when the scale ratio of FIG. 24 is changed.
FIG. 26 is a diagram showing an example of a screen displayed on the display monitor 119 and an update area selection display screen in the in-vehicle device 100 according to the second embodiment.
FIG. 27 is an example of a screen displayed on the display monitor 119 in the in-vehicle device 100 of the second embodiment.
FIG. 28 is an example of a screen displayed on the display monitor 119 in the in-vehicle device 100 according to the second embodiment.
FIG. 29 is an example of a screen displayed on the display monitor 119 in the in-vehicle device 100 of the second embodiment.
[Explanation of symbols]
100 In-vehicle device 111 Current location detection device
111a Direction sensor 111b Vehicle speed sensor
111c GPS sensor 111d gyro sensor
112 Map storage unit 113 DVD-ROM
114 Control circuit 115 RAM
116 ROM 117 input device
118 Image memory 119 Display monitor
150 Mobile phone 200 Distribution center
201 Request reception server 202 Map / POI server
203 Request processing server 204 Customer DB server
250 Mobile communication network

Claims (8)

In response to a route search request from the vehicle, the first route search calculation based on the latest map and the second route search calculation based on the map used for the vehicle that requested the route search are performed to obtain route information and guidance information. Computing means for
A map distribution device comprising: determination means for determining whether or not a map used for the vehicle needs to be updated based on the results of the first and second route search calculations. The map distribution device according to claim 1,
When the determination means determines that the map needs to be updated, the map distribution device includes a notification means for notifying the vehicle that the map needs to be updated. The map distribution device according to claim 1,
A map distribution apparatus comprising: a transmission unit that transmits the latest map to the vehicle when the determination unit determines that the map needs to be updated. In the map delivery apparatus in any one of Claims 1-3,
The determination means determines that the map used for the vehicle needs to be updated when the route information acquired by the first and second route search computations does not match and / or when the guidance information does not match. A map distribution apparatus characterized by that. A calculation means for performing a search calculation of a route from the present location to the destination;
When a search calculation is performed, a transmission unit that transmits an inquiry about whether or not map update is necessary to any one of the first to fourth map distribution devices;
A vehicle-mounted terminal device comprising: receiving means for receiving updated map data transmitted from the outside in response to an inquiry about necessity of map update. The in-vehicle terminal device according to claim 5,
Storage means for storing the received updated map data;
A vehicle-mounted terminal device further comprising map data before update and management means for managing the update map data. The in-vehicle terminal device according to claim 5 or 6,
An in-vehicle terminal device further comprising setting means for setting one of a mode in which an inquiry about necessity of map update is constantly transmitted and a mode in which a map is not always transmitted when a search calculation is performed. The in-vehicle terminal device according to claim 5 or 6,
A mode for receiving updated map data transmitted from the map distribution device in response to an inquiry about whether or not the map needs to be updated, and the map distribution in response to an update map transmission request instructed after the update is notified A vehicle-mounted terminal device further comprising mode setting means for setting a mode for receiving an update map transmitted from the device.

Images