JP6476870B2 - Movement guide device, map information update method for movement guide device, and computer program - Google Patents

Description

  The present invention relates to a movement guide device that performs movement guidance of a moving body based on map information stored in a storage medium, a map information update method for the movement guide device, and a computer program.

  2. Description of the Related Art In recent years, a navigation device is often mounted on a vehicle that provides vehicle travel guidance so that a driver can easily arrive at a desired destination. Here, the navigation device detects the current position of the vehicle by a GPS receiver or the like, acquires map information corresponding to the current position through a recording medium such as a DVD-ROM or HDD or a network, and displays it on a liquid crystal monitor. It is a device that can do. In addition, the navigation device has a route search function for searching for an optimum route from a departure point (for example, the current position of the host vehicle) to the set destination when a desired destination is set. It also has a travel guidance function for guiding travel according to the route (guide route). In recent years, some mobile phones, PDAs (Personal Digital Assistants), smart phones, personal computers, and the like have functions similar to those of the navigation device (hereinafter referred to as a movement guide device including the navigation device).

  Here, new roads (new roads) are built every year in Japan. Along with this, existing roads disappear, intersections are added, and the shapes of existing roads and intersections are changed. At this time, there is a problem that information relating to a newly created road or the like newly created after the map information of the movement guide device is created is not registered in the map information. That is, in a travel guidance device having map information that does not include a new road etc., the new road etc. is not subject to route search or guidance, so the travel guidance device searches for a detour guide route that does not pass through the new road etc. There are cases where appropriate driving guidance is not performed, such as the fact that an actual road or intersection is not guided on a map image.

  In recent years, there has also been proposed a configuration (hereinafter referred to as center route search) in which a route search is not performed on the movement guide device side but is executed by an external server having the latest map information and a guide route is acquired from the external server. . When a center route search is performed, a route can be searched based on the latest map information, while travel guidance along the guide route cannot be performed on the side of the travel guide device having the old version of map information. There was a problem. For example, when a guidance intersection that is a target to turn left or right on a guidance route is a newly established intersection, guidance for right or left turn at the guidance intersection is not performed. In addition, in the case of an intersection whose structure has been changed, guidance in an incorrect direction is performed based on old map information.

  In order to avoid the above problems when performing the center route search, it is necessary to update the map information of the movement guide device to the latest version before the vehicle starts traveling. However, in order to update the map information, it is necessary to receive data for updating the map information from the external center, and to perform a process of rewriting the map information based on the received data. It may take a long time to complete the update. Therefore, if the vehicle starts traveling immediately after the power of the movement guide device is turned on, the vehicle may reach the guidance intersection before completing the update. In that case, the above problem cannot be solved. Therefore, for example, in Japanese Patent Application Laid-Open No. 2003-334069, when acquiring map information from an external server by communication, first, TBT data, which is data for performing simple guidance, is acquired by communication, and then map information is communicated. The technique acquired by this is disclosed.

  According to the above technique, even if it takes a long time to acquire map information from an external server, travel guidance is performed based on TBT data during that period, so guidance along at least the guidance route is not performed. It is possible to prevent the wrong guidance from being performed.

Japanese Patent Laying-Open No. 2003-334069 (page 7-8, FIG. 6)

  However, in the technique of the above-mentioned Patent Document 1, it is necessary to acquire TBT data and map information from an external server by communication, so that the processing load and cost related to communication are lower than when only map information is acquired by communication. There was a rising problem. Since TBT data is unnecessary data after all map information is acquired, it is desirable to reduce the amount acquired as much as possible.

  The present invention has been made to solve the above-described conventional problems, and when updating map information stored in a storage medium to new map information, information used for moving guidance of the moving body is firstly used. By obtaining only the necessary minimum amount from an external server, appropriate movement guidance of the moving body along the guidance route is performed based on the latest map information without significantly increasing the processing burden and cost related to communication. It is an object of the present invention to provide a travel guide device, a map information update method for the travel guide device, and a computer program that make it possible.

In order to achieve the above object, a first movement guide device according to the present invention uses a guide route acquisition means for acquiring a guide route of a moving body and map information stored in a map information storage medium, and A moving guide means for guiding the movement of the moving body along with the map information stored in the map information storage medium, and updating the map information of the area around the current position of the moving body to a new version of the map information Update information acquisition means for acquiring map update information for communication from an external server, and the map information stored in the map information storage medium based on the map update information acquired by the update information acquisition means. Map information updating means for updating to the new version of map information, and travel guidance used for travel guidance by the travel guide means corresponding to the new version of map information The distribution has a movement guide information acquiring means for acquiring the communication from the external server, the movement guiding information acquisition means is stored the map update information in the map information storage medium is obtained from said external server Until the update of the map information is completed, it is determined whether or not the map information of the area where the mobile body is predicted to move is the new version of the map information, and the mobile body is predicted to move. If the map information of the area to be processed is not the map information of the new version, before the map update information is acquired from the external server, the travel guide information for an area within a predetermined distance from the current position of the mobile object Is acquired from the external server, and the movement guide means acquires the movement guide information from the external server and then stores it in the map information storage medium. Until the update of the map information is completed, the travel guidance information is used to guide the travel by the travel guide means, and after the update of the map information is completed, the updated map information is used to update the map information. The travel guidance is performed by a travel guidance unit, and the predetermined distance is calculated by acquiring the map update information from the external server and completing the update of the map information stored in the map information storage medium. The distance is set according to the movement distance predicted to move the body.
The “moving body” includes a pedestrian and a two-wheeled vehicle in addition to the vehicle.
In addition, the second movement guide device according to the present invention uses a guide route acquisition means for acquiring a guide route of a mobile object and map information stored in a map information storage medium, and the mobile object along the guide route. And a map for updating the map information of the area around the current position of the mobile body to the new version of the map information among the map information stored in the map information storage medium. Update information acquisition means for acquiring update information by communication from an external server in units of first areas, and the map stored in the map information storage medium based on the map update information acquired by the update information acquisition means Map information updating means for updating information to the new version of map information, and a movement plan used for movement guidance by the movement guidance means corresponding to the new version of map information Movement guidance information acquisition means for acquiring information by communication from the external server in units of a second area narrower than the first area, and the movement guidance information acquisition means obtains the map update information from the external server. Before acquiring from the server, the movement guide information is acquired from the external server for an area within a predetermined distance from the current position of the mobile body, and the movement guide means acquires the movement guide information from the external server. Until the update of the map information stored in the map information storage medium is completed using the movement guide information, and the movement guide means performs the movement guidance, and after the update of the map information is completed Using the updated map information, movement guidance is performed by the movement guide means, and the predetermined distance is obtained by acquiring the map update information from the external server and Until updating of the map information stored in the information storage medium is completed, the movable body is characterized in that it is set to a distance corresponding to the travel distance is expected to move.

Further, the map information updating method of the movement guide device according to the present invention is based on the guide route using the guide route acquisition means for acquiring the guide route of the mobile body and the map information stored in the map information storage medium. A map information updating method for a travel guidance device, comprising travel guide means for performing travel guidance for a mobile object. Specifically, update information acquisition means for updating the map information of the area around the current position of the mobile body to the new version of the map information among the map information stored in the map information storage medium. The step of acquiring map update information from an external server by communication, and the map information update means, based on the map update information acquired by the update information acquisition means, the map information stored in the map information storage medium The step of updating to the new version of the map information, and the movement guide information acquisition means acquires the movement guide information used for the movement guidance by the movement guide means corresponding to the new version of the map information from the external server by communication. comprising the steps of, a, the movement guiding information obtaining means, the map information by acquiring the map update information from the external server Until the update of the map information stored in the storage medium is completed, it is determined whether the map information of the area where the mobile body is predicted to move is the new version of map information, and the movement When the map information of the area where the body is predicted to move is not the new version of the map information, the area within the predetermined distance from the current position of the mobile object is acquired before the map update information is acquired from the external server. The travel guidance information is acquired from the external server, and the travel guide means acquires the travel guide information from the external server until the update of the map information stored in the map information storage medium is completed. Performs movement guidance by the movement guidance means using the movement guidance information, and after the update of the map information is completed, the updated map The travel guidance by the travel guidance means is performed using information, and the predetermined distance is obtained until the update of the map information stored in the map information storage medium after the map update information is acquired from the external server is completed. In the meantime, the distance is set according to the movement distance predicted to move the moving body.

Further, the computer program according to the present invention provides guidance for moving the mobile body along the guide route by using guide route acquisition means for acquiring the guide route of the mobile body and map information stored in the map information storage medium. A computer program for updating map information of a movement guide device having movement guide means for performing. Specifically, the map update information for updating the map information of the area around the current position of the mobile body to the new version of the map information among the map information stored in the map information storage medium. Update information acquisition means for acquiring from the external server by communication, and the map information stored in the map information storage medium based on the map update information acquired by the update information acquisition means, the map information of the new version Map information update means for updating to, and movement guide information acquisition means for acquiring movement guide information used for movement guidance by the movement guide means corresponding to the new version of map information from the external server by communication, together to function, the movement guiding information obtaining means, the map information storage acquires the map update information from the external server Before the update of the map information stored in the medium is completed, it is determined whether the map information of the area where the mobile body is predicted to move is the new version of the map information, and the mobile body If the map information of the area predicted to move is not the new version of the map information, the area within a predetermined distance from the current position of the mobile object is acquired before acquiring the map update information from the external server. The movement guide information is acquired from the external server, and the movement guide means acquires the movement guide information from the external server until the update of the map information stored in the map information storage medium is completed. The travel guidance is performed by the travel guidance means using the travel guidance information, and after the update of the map information is completed, the updated map information Using the movement guide means, and the predetermined distance is obtained during the period from the acquisition of the map update information from the external server until the update of the map information stored in the map information storage medium is completed. The moving body is set to a distance corresponding to a moving distance predicted to move.

  According to the movement guide device, the map information update method of the movement guide device, and the computer program according to the present invention having the above-described configuration, when updating the map information stored in the storage medium to new map information, Only the minimum necessary amount of information used for the travel guidance can be acquired from the external server. As a result, it is possible to perform appropriate mobile body movement guidance along the guide route based on the latest map information without significantly increasing the processing load and cost associated with communication compared to the conventional case.

It is the schematic block diagram which showed the map information update system which concerns on this embodiment. It is the figure which showed the update object area of map information. It is a block diagram which shows typically the control system of the navigation apparatus which concerns on this embodiment. It is the figure explaining the update process of the map information memorize | stored in the navigation apparatus. It is a flowchart of the map information update process program which concerns on this embodiment. It is a figure explaining the acquisition determination method of movement guidance information. It is a figure explaining the acquisition object area of movement guidance information.

DETAILED DESCRIPTION Hereinafter, a movement guide device according to the present invention will be described in detail with reference to the drawings based on an embodiment in which the navigation device 1 is embodied.
First, a schematic configuration of a map information update system 2 including a navigation device 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic configuration diagram showing a map information update system 2 according to the present embodiment.

  As shown in FIG. 1, a map information update system 2 according to the present embodiment includes a navigation device 1 that is a movement guide device installed in a vehicle 3 and a map distribution server that is arranged in an external center such as a map distribution center 4. 5 basically. In the present embodiment, an example in which the navigation device 1 installed in the vehicle 3 is used as a movement guide device that stores map information and performs travel guidance of the vehicle 3 using the stored map information will be described. However, instead of the navigation device 1, a mobile phone, a smartphone, a PDA, a personal computer, or the like may be used. Moreover, when using a mobile phone, a smart phone, or a PDA, it is also possible to provide travel guidance for a moving body (for example, a pedestrian or a bicycle) other than the vehicle 3.

  Here, the map distribution server 5 updates the old version of map information stored in the navigation device 1 to new version of map information reflecting newly established or abolished roads and facilities ( Hereinafter, it is an external server that performs generation of map update information) and distribution of the generated map update information. In addition, as the update method of map information, all the map information memorize | stored in the navigation apparatus 1 is rewritten and updated (henceforth all update), and only the required part of map information is rewritten and updated (henceforth, There is a method called differential update. In this embodiment described below, an example in which map information is updated by differential update will be described.

  In addition to the map update information, the map distribution server 5 according to the present embodiment performs simple travel guidance along the guide route by the navigation device 1 corresponding to the latest version of map information that the map distribution server 5 has. Data (hereinafter referred to as travel guidance information) and data for performing additional guidance at specific points such as guidance intersections and junctions corresponding to the latest version of map information (hereinafter referred to as guidance additional information) Also deliver as needed. The details of the movement guidance information and the guidance additional information will be described later.

  In addition, the map distribution server 5 performs route search instead of the navigation device 1. Specifically, when a destination is set in the navigation device 1, information necessary for route search such as a departure point and a destination is transmitted from the navigation device 1 to the map distribution server 5. On the other hand, the map distribution server 5 performs a route search using the map information of the map distribution server 5 and specifies a recommended route from the departure point to the destination. Then, the specified recommended route is transmitted to the navigation device 1 as a transmission source. Then, the navigation device 1 sets the received recommended route as a guide route, and performs travel guidance according to the guide route. Thereby, even if the map information stored in the navigation device 1 at the time of setting the guide route is an old version of the map information, an appropriate guide route is set based on the latest version of the map information that the map distribution server 5 has. It becomes possible to do.

  The navigation device 1 is installed in a vehicle 3 traveling on each road in the country, displays a map around the vehicle position based on stored map information, and searches for and searches for a route to a set destination. This is an in-vehicle device that provides travel guidance based on the route. However, in the present embodiment, the route search is basically performed in the map distribution server 5 instead of the navigation device 1. When the vehicle 3 approaches a specific point such as a guidance intersection or junction, an intersection guidance map, a junction schematic diagram, or the like is displayed using the guidance additional information received from the map distribution server 5. Further, during the update of the map information, the vehicle travel guidance along the guide route is performed based on the travel guide information acquired in advance from the map distribution server 5 instead of the old version of the map information to be stored. To do.

  In addition, the map distribution server 5 and the navigation device 1 both use a mobile phone or a vehicle communication module 6 (hereinafter simply referred to as a communication module 6) such as a DCM mounted on the vehicle 3 in advance via the network 7. It communicates with each other, and transmits and receives various types of information such as a route search request, route information, map update information distribution request, travel guidance information, guidance additional information, and map update information, which will be described later.

Further, the navigation device 1 specifies the vicinity of the current position of the vehicle 3 with respect to the map distribution server 5 when a specific condition is satisfied (for example, when the ACC power is turned on or when a guidance route is set). A map update information distribution request for updating map information of an area (for example, a level 10 mesh including a 20 km square area centered on the current position of the vehicle) to a new version of map information is transmitted.
Further, when the navigation apparatus 1 receives the map update information from the map distribution server 5 in response to the transmitted distribution request, the navigation apparatus 1 updates the map information to be stored based on the received map update information. The details of the map information update process will be described later.

Next, the map distribution server 5 constituting the map information update system 2 will be described in detail with reference to FIG.
As shown in FIG. 1, the map distribution server 5 includes a server control ECU 11, a server side map DB 12 as an information recording unit connected to the server control ECU 11, and a server side communication device 13.

  The server control ECU 11 (electronic control unit) is an electronic control unit that performs overall control of the map distribution server 5. The CPU 21 as an arithmetic device and a control device, and a working memory when the CPU 21 performs various arithmetic processes. In addition to the RAM 22 to be used and the control program, a ROM 23 in which a map information update processing program (see FIG. 5) described later is recorded, and an internal storage device such as a flash memory 24 for storing a program read from the ROM 23 are provided. Yes.

  The server-side map DB 12 includes basic map information 25 that is the latest map information that is registered based on input data and input operations from the outside and is updated when the map information stored in the navigation device 1 is updated. , Storage means that is divided and stored for each version and each area (for example, each level 10 mesh of 20 km square). Here, the version is creation time information for specifying the time when the map information is created, and the time when the map information is created can be specified by referring to the version. In addition to the latest version of the basic map information 25, the old version of the basic map information 25 is stored in the server-side map DB 12 separately for each version and area.

  Here, the map information stored in the navigation device 1 and the basic map information 25 have basically the same configuration, and various kinds of information necessary for route search, route guidance, and map display including the road network. It consists of information. For example, link data regarding roads (links), node data regarding node points, intersection data regarding each intersection, point data regarding points such as facilities, map display data for displaying a map, search data for searching for a route, points It consists of search data and the like for searching.

  Further, in the server side map DB 12, travel guidance information 26 which is information for performing simple travel guidance along the guidance route by the navigation device 1 corresponding to the latest version of map information separately from the basic map information 25. Are also divided and stored for each area (for example, each level 13 mesh of 2.5 km square).

  Here, the movement guidance information 26 is necessary for the guidance for causing the vehicle to travel along the guidance data such as the matching data necessary for performing the map matching of the vehicle 3 and the right / left turn guidance at the guidance intersection. It consists of the guidance data that becomes. The matching data includes data for specifying the road shape, for example. In addition, the guidance data includes, for example, data for specifying the shape of the intersection and the connection relationship between the intersection and the road.

  The server-side map DB 12 also stores additional guidance information 27 for additional guidance at specific points such as guidance intersections and junctions corresponding to the latest version of map information for each area (for example, 2.5 km square). Each level 13 mesh) is stored separately.

  Here, the guidance additional information 27 is composed of, for example, an enlarged intersection diagram, a junction schematic diagram, special guidance voice, and the like. Further, as for the guidance additional information 27, not all the information is delivered to the navigation apparatus 1 at once, but only the guidance additional information 27 of the necessary area according to the current position of the vehicle 3 and the guidance route is stepwise. Configure to deliver to.

  Then, as described later, the server control ECU 11 specifies an area to be updated in the navigation device 1 (hereinafter referred to as an update target area) when there is the navigation device 1 that updates the map information. Then, map update information for updating the map image of the update target area is generated and distributed to the target navigation device 1. The map update information is data for differentially updating the map information of the update target area to the new version of the map information among the map information stored in the navigation device 1. The update target area is a level 10 (20 km square) mesh that includes an area of 20 km square centered on the current position of the vehicle 3 on which the navigation device 1 is mounted. For example, as shown in FIG. 2, when the current position of the vehicle 3 is located in the mesh E among the meshes A to I of the level 10, an area 28 of 20 km square centering on the current position of the vehicle 3 is included. Meshes A, B, D, and E are update target areas.

  Further, when generating and distributing the map update information, the server control ECU 11 also distributes the travel guide information 26 to the navigation device 1 as necessary. Specifically, the navigation device corresponding to the travel guidance information 26 in an area where the vehicle 3 on which the navigation device 1 is mounted may travel before the map update information is distributed before the map update information is distributed. 1 is configured to be distributed.

  The server side communication device 13 is a communication device for communicating with the navigation device 1 via the network 7. Here, as the network 7, for example, a LAN (Local Area Network), a WAN (Wide Area Network), an intranet, a mobile phone network, a telephone network, a public communication network, a dedicated communication network, a communication network such as the Internet Etc. can be used. A communication system using CS broadcasting, BS broadcasting, terrestrial digital television broadcasting, FM multiplex broadcasting, or the like by a broadcasting satellite can also be used. Furthermore, a communication system such as a non-stop automatic fee payment system (ETC) or a narrow area communication system (DSRC) used in an intelligent road traffic system (ITS) can also be used.

  Next, a schematic configuration of the navigation device 1 mounted on the vehicle 3 will be described with reference to FIG. FIG. 3 is a block diagram schematically showing a control system of the navigation device 1 according to the present embodiment.

  As shown in FIG. 3, the navigation device 1 according to the present embodiment includes a current position detection unit 31 that detects the current position of the vehicle 3 on which the navigation device 1 is mounted, and a data recording unit 32 that records various data. A navigation ECU 33 that performs various arithmetic processes based on the input information, an operation unit 34 that receives operations from the user, a liquid crystal display 35 that displays a guide route to a map and a destination for the user, Communication that communicates between the speaker 36 that outputs voice guidance related to route guidance, the DVD drive 37 that reads a DVD as a storage medium, the map distribution server 5, a VICS (registered trademark: Vehicle Information and Communication System) center, and the like. Module 6.

Below, each component which comprises the navigation apparatus 1 is demonstrated in order.
The current position detection unit 31 includes a GPS 41, a vehicle speed sensor 42, a steering sensor 43, a gyro sensor 44, and the like, and can detect the current vehicle position, direction, vehicle traveling speed, current time, and the like. . Here, in particular, the vehicle speed sensor 42 is a sensor for detecting a moving distance and a vehicle speed of the vehicle, generates a pulse according to the rotation of the driving wheel of the vehicle, and outputs a pulse signal to the navigation ECU 33. And navigation ECU33 calculates the rotational speed and moving distance of a driving wheel by counting the pulse which generate | occur | produces. Note that the navigation device 1 does not have to include all the four types of sensors, and the navigation device 1 may include only one or more types of sensors.

  In addition, the data recording unit 32 reads an external storage device and a hard disk (not shown) as a recording medium, a navigation side map DB 45, a version management DB 46, a cache 47, a predetermined program, etc. recorded on the hard disk and stores them in the hard disk. And a recording head (not shown) as a driver for writing predetermined data. The data recording unit 32 may be configured by a memory card, an optical disk such as a CD or a DVD, instead of the hard disk.

  Here, the navigation side map DB 45 is a storage means for storing navigation map information 48 used for travel guidance in the navigation device 1.

  Here, the navigation map information 48 stored in the navigation side map DB 45 is composed of various information necessary for route search, route guidance, and map display including the road network, as with the basic map information 25 described above. For example, link data regarding roads (links), node data regarding node points, intersection data regarding each intersection, point data regarding points such as facilities, map display data for displaying a map, search data for searching for a route, points It consists of search data and the like for searching.

  Then, the navigation map information 48 stored in the navigation side map DB 45 is updated to a new version of map information by rewriting the data of the corresponding part to new data based on the map update information distributed from the map distribution server 5. Is done. The specific update process of the navigation map information 48 will be described later in detail.

  The version management DB 46 is storage means for recording the version of the navigation map information 48 currently stored in the navigation side map DB 45 for each area. The version management DB 46 is updated as the navigation map information 48 is updated to a new version of map information based on the map update information distributed from the map distribution server 5. Further, the version management DB 46 may be configured to be provided in the map distribution server 5.

  The cache 47 is a storage means for temporarily storing the movement guide information 26 and the guidance additional information 27 distributed from the map distribution server 5. In the map information update system 2 according to the present embodiment, when the navigation map information 48 stored in the navigation-side map DB 45 is updated as described above, the navigation device 1 is mounted until the update of the map information is completed. The travel guidance information 26 in an area where the vehicle 3 may travel is distributed from the map distribution server 5 with priority over the map update information and stored in the cache 47. Here, the movement guidance information 26 is information for performing simple travel guidance along the guidance route by the navigation device 1 corresponding to the latest map information as described above.

  When the navigation ECU 33 updates the navigation map information 48 stored in the navigation side map DB 45, the navigation ECU 33 uses the movement guide information 26 stored in the cache 47 until the update of the navigation map information 48 is completed. Simple travel guidance is performed along the guide route. On the other hand, after the update of the navigation map information 48 is completed, travel guidance along the guidance route is performed based on the updated navigation map information 48. Therefore, after the update of the navigation map information 48 is completed, the travel guidance information 26 stored in the cache 47 is no longer necessary and is deleted.

  On the other hand, the guidance additional information 27 is distributed stepwise from the map distribution server 5 to the navigation device 1 in accordance with the current position of the vehicle 3 and the guidance route. 47 is stored. The navigation apparatus 1 uses the guidance additional information 27 to provide additional guidance for traveling at a specific point such as a guidance intersection or junction (for example, display of an enlarged intersection diagram or a junction schematic diagram). Note that the additional guidance information 27 in the area through which the vehicle 3 has passed is deleted because it becomes unnecessary.

  On the other hand, the navigation ECU (Electronic Control Unit) 33 is an electronic control unit that controls the entire navigation device 1. The CPU 51 as an arithmetic device and a control device, and a working memory when the CPU 51 performs various arithmetic processes. From the ROM 53 and the ROM 53 in which a map data update processing program (see FIG. 5) and the like to be described later are recorded in addition to the RAM 52 and the control program for storing the route data when the route is searched. An internal storage device such as a flash memory 54 for storing the read program is provided. The navigation ECU 13 constitutes various means as processing algorithms. For example, the guide route acquisition unit acquires the guide route of the vehicle 3. The movement guide means uses the navigation map information 48 stored in the navigation side map DB 45 to guide the vehicle 3 along the guide route. The update information acquisition means includes map update information for updating the map information in the area around the current position of the vehicle 3 to the new version of the map information in the navigation map information 48 stored in the navigation side map DB 45, Obtained from the distribution server 5 by communication. The map information update means updates the navigation map information 48 stored in the navigation side map DB 45 to a new version of map information based on the acquired map update information. The movement guidance information acquisition means acquires the movement guidance information 26 used for movement guidance of the navigation device 1 corresponding to the new version of map information from the map distribution server 5 by communication.

  The operation unit 34 is operated when inputting a departure point as a travel start point and a destination point as a travel end point, and includes a plurality of operation switches (not shown) such as various keys and buttons. Then, the navigation ECU 33 performs control to execute various corresponding operations based on switch signals output by pressing the switches. The operation unit 34 can also be configured by a touch panel provided on the front surface of the liquid crystal display 35. Moreover, it can also be comprised with a microphone and a speech recognition apparatus.

  Further, the liquid crystal display 35 has a map image including a road, traffic information, operation guidance, operation menu, key guidance, guidance route from the departure point to the destination, guidance information along the guidance route, news, weather forecast, Time, mail, TV program, etc. are displayed. Instead of the liquid crystal display 35, HUD or HMD may be used.

  In addition, the speaker 36 outputs voice guidance for guiding traveling along the guidance route based on an instruction from the navigation ECU 33 and traffic information guidance.

  The DVD drive 37 is a drive that can read data recorded on a recording medium such as a DVD or a CD. Based on the read data, music and video are reproduced, the navigation side map DB 45 is updated, and the like.

  The communication module 6 is a communication device for receiving information such as map update information, route information, and traffic information transmitted from the map distribution server 5, VICS (registered trademark) center, probe center, and the like. For example, a mobile phone or DCM is applicable.

Next, update processing of the navigation map information 48 stored in the navigation device 1 having the above configuration will be briefly described with reference to FIG. In the example shown in FIG. 4, the navigation map information 48 stored in the navigation device 1 is updated in the map information of a predetermined update target area, and the navigation stored in the navigation-side map DB 45 of the navigation device 1 is used. The case where the version of the update target area of the map information 48 is “4” and the latest version of the update target area of the basic map information 25 owned by the map distribution server 5 is “5” will be described.
In this case, the map distribution server 5 creates the map update information 65 by comparing the version “4” stored in the server-side map DB 12 with the basic map information 25 of the version “5”. Further, when the map update information 65 is created, a process for checking an error in the created map update information 65 is also performed. The map update information 65 generated in this case is the map information in the update target area from the version “4” to the version “5” in the navigation map information 48 stored in the navigation side map DB 45 of the navigation device 1. And the data to be updated.
Then, the map distribution server 5 distributes the generated map update information 65 to the navigation device 1 that is the distribution request source. On the other hand, the navigation apparatus 1 that has received the map update information 65 updates the navigation map information 48 stored in the navigation-side map DB 45 using the received map update information 65. As a result, among the navigation map information 48 stored in the navigation-side map DB 45 of the navigation device 1, the navigation map information 48 in the update target area is updated from the version “4” to the version “5”.

  Next, a map information update processing program executed by the navigation device 1 and the map distribution server 5 in the map information update system 2 having the above configuration will be described with reference to FIG. FIG. 5 is a flowchart of the map information update processing program according to the present embodiment. Here, the map information update processing program is executed when a predetermined operation (for example, a destination setting operation) for performing a route search in the navigation device 1 is received, and the map update information distributed from the map distribution server 5 Is a program for updating the navigation map information 48 stored in the navigation side map DB 45. The program shown in the flowchart in FIG. 5 below is stored in the RAM or ROM provided in the navigation device 1 or the map distribution server 5 and is executed by the CPU 21 or the CPU 51.

  First, a map information update processing program executed by the CPU 61 of the navigation device 1 will be described with reference to FIG. First, in step (hereinafter abbreviated as S) 1, the CPU 61 transmits a route search request to the map distribution server 5 based on the received user operation. Here, in the route search request, the user ID that specifies the navigation device 1 that is the transmission source of the route search request, the departure point (for example, the current position of the vehicle 3) and the destination that are the search conditions for the route search are specified. Contains information. The departure point corresponds to the current position of the vehicle 3, an arbitrary point designated by the user on the map, a facility selected by the user, and the like. The destination corresponds to an arbitrary point designated by the user on the map, a facility selected by the user, or the like.

  Next, in S <b> 2, the CPU 61 receives the route information transmitted from the map distribution server 5. Here, the route information received in S2 is the destination from the origin searched by the map distribution server 5 using the basic map information 25 which is the latest version of map information based on the route search request transmitted in S1. It is information about the recommended route to In S2, the latest version of the basic map information 25 used for the route search, particularly the ID for specifying the mesh around the recommended route and the information for specifying the current version of each mesh (that is, the latest version) are also used. Configure to receive.

  Subsequently, in S3, the CPU 61 sets a recommended route searched by the map distribution server 5 as a guide route to be travel guidance in the navigation device 1 based on the route information received in S2.

  Thereafter, in S4, after the vehicle 3 starts traveling in parallel with the subsequent update processing of the navigation map information 48, the vehicle traveling guidance processing based on the guidance route set in S3 is started. Specifically, when the guidance branch point to be turned right or left approaches a predetermined distance before the vehicle, an enlarged view of the guidance branch point is displayed, or the traveling direction of the vehicle 3 at the guidance branch point is guided. To do. The CPU 61 basically performs the travel guidance based on the navigation map information 48 stored in the navigation side map DB 45 and the guidance additional information 27 stored in the cache 47. However, when the navigation map information 48 in the area around the current position of the vehicle is not the latest version and the navigation map information 48 is updated, the movement guide information 26 is acquired from the map distribution server 5 and the acquired movement guide information is acquired. 26 is also used to provide the travel guidance. Specifically, until the update of the navigation map information 48 is completed, simple travel guidance along the guidance route is performed using the travel guidance information 26 stored in the cache 47. The travel guidance information 26 is necessary for matching data necessary for map matching of the vehicle 3 and guidance for causing the vehicle to travel along a guidance route such as a left / right turn guidance at a guidance intersection. Even if the displayed map image does not correspond to the guidance route, at least the current position of the vehicle can be specified and guided at the correct intersection, and the correct traveling direction of the vehicle at the guidance intersection Can be guided.

  On the other hand, after the update of the navigation map information 48 is completed, travel guidance along the guidance route is performed based on the updated navigation map information 48.

Next, in S <b> 5, the CPU 61 determines whether or not the travel guide information 26 needs to be acquired from the map distribution server 5. Here, the case where it is necessary to obtain the travel guidance information 26 from the map distribution server 5 means that the navigation map information 48 around the current position of the vehicle, in particular, a guide route of a predetermined first distance a from the current position of the vehicle. This corresponds to the case where the navigation map information 48 in the area including is not the latest version of map information (that is, when it is necessary to update to the new version of map information). Here, the first distance “a” indicates that the vehicle 3 travels on the guide route until the map update information is acquired from the map distribution server 5 and the update of the navigation map information 48 stored in the navigation side map DB 45 is completed. The movement distance x predicted to move is assumed. Accordingly, the first distance a is the average vehicle speed V of the guide route, and the time T required to complete the update of the navigation map information 48 acquired from the map distribution server 5 and stored in the navigation side map DB 45. And calculated based on the above. Specifically, it is calculated by the following equation (1).
a (= x) = V × T (1)
The time T is determined based on the communication standard, the data size of the map update information, the CPU performance of the navigation device 1, and the like. As a result of the calculation using the above formula (1), for example, the first distance a is calculated as 10 km.

  For example, when the guide route 66 of the vehicle 3 is set as shown in FIG. 6, at least one of the meshes P and Q including the guide route 66 at the first distance a from the current position of the vehicle is the latest version. If it is not map information, it is determined that the travel guide information 26 needs to be acquired from the map distribution server 5.

  And when it determines with it being necessary to acquire the movement guidance information 26 from the map delivery server 5 (S5: YES), it transfers to S6. On the other hand, when it is determined that it is not necessary to acquire the travel guide information 26 from the map distribution server 5 (S5: NO), the process proceeds to S7 without acquiring the travel guide information 26 from the map distribution server 5. To do.

  In S6, the CPU 61 transmits a signal requesting the movement guide information 26 to the map distribution server 5, and receives the movement guide information 26 distributed from the map distribution server 5 in response to the request. Note that the travel guidance information 26 is acquired in units of level 13 meshes. The received travel guidance information 26 is stored in the cache 47 and used for simple travel guidance along the guidance route in the navigation device 1 as described above.

  The travel guidance information 26 acquired from the map distribution server 5 is an area within a predetermined second distance b from the current position of the vehicle. Note that the second distance b indicates that the vehicle 3 moves on the guide route until the map update information is acquired from the map distribution server 5 and the update of the navigation map information 48 stored in the navigation side map DB 45 is completed. Then, the distance is the distance that minimizes the information amount of the movement guide information 26 acquired from the map distribution server 5 at or above the predicted movement distance x. Here, the movement guide information 26 is divided and stored for each level 13 mesh of 2.5 km square, and distribution is also performed for each mesh. Therefore, the length of the guide route included in the mesh including the guide route of the moving distance x from the current position of the vehicle becomes the second distance b.

  For example, as shown in FIG. 7, when the guide route 66 of the vehicle 3 is set, the guide routes 66 included in the meshes I, J, K, and G including the guide route 66 of the moving distance x from the current position of the vehicle. Is the second distance b. Then, the movement guide information 26 of the meshes I, J, K, and G is an acquisition target in S6.

  Subsequently, in S <b> 7, the CPU 61 determines whether or not the guidance additional information 27 needs to be acquired from the map distribution server 5. Here, the case where it is necessary to obtain the additional guidance information 27 from the map distribution server 5 is an area including a guidance route at a predetermined third distance c from the current position forward, more specifically, in the forward direction of the vehicle. This corresponds to the case where the additional guidance information 27 is not acquired. Here, the third distance c may be a fixed distance (for example, 10 km), or may be set based on the average vehicle speed of the guide route.

  And when it determines with it being necessary to acquire the guidance additional information 27 from the map delivery server 5 (S7: YES), it transfers to S8. On the other hand, when it is determined that it is not necessary to acquire the guidance additional information 27 from the map distribution server 5 (S7: NO), the process proceeds to S9 without acquiring the guidance additional information 27 from the map distribution server 5. To do.

  In S8, the CPU 61 transmits a signal for requesting the guidance additional information 27 to the map distribution server 5, and receives the guidance additional information 27 distributed from the map distribution server 5 in response to the request. The guidance additional information 27 is acquired in units of level 13 meshes. The received guidance additional information 27 is stored in the cache 47, and is used for additional guidance at a specific point such as a guidance intersection or junction in the navigation device 1 (for example, display of an enlarged intersection diagram or a junction schematic diagram).

  Here, the guidance additional information 27 is divided and stored for each level 13 mesh of 2.5 km square, and distribution is also performed for each mesh. Accordingly, the additional guidance information 27 acquired from the map distribution server 5 is mesh additional guidance information 27 including the guidance route at the third distance c from the current position of the vehicle.

  Next, in S <b> 9, the CPU 61 determines whether or not the map update information 65 needs to be acquired from the map distribution server 5. Here, the case where the map update information 65 needs to be acquired from the map distribution server 5 means that the navigation map information 48 of at least a part of the update target area is not the latest version of map information at the present time (that is, new). Applicable when it is necessary to update to the version map information). In the present embodiment, the update target area is a level 10 mesh including an area of 20 km square centered on the current position of the vehicle 3 (see FIG. 2).

  And when it determines with it being necessary to acquire the map update information 65 from the map delivery server 5 (S9: YES), it transfers to S10. On the other hand, if it is determined that it is not necessary to acquire the map update information 65 from the map distribution server 5 (S9: NO), the map update information 65 is not acquired and the navigation map information 48 is not updated. Migrate to

  In S10, the CPU 61 transmits a signal requesting the map update information 65 to the map distribution server 5 and receives the map update information 65 distributed from the map distribution server 5 in response to the request. The map update information 65 is acquired in units of level 10 meshes wider than level 13. In addition, the map update information distribution request includes a user ID that identifies the navigation device 1 that is the transmission source of the distribution request, and information related to the update target area. The information related to the update target area includes the mesh number of the mesh corresponding to the update target area and the current version in the navigation map information 48 of the mesh corresponding to the update target area. The current version of the navigation map information 48 is managed by the version management DB 46.

  The map update information is data for updating the map information in the update target area from the current version to the new version among the navigation map information 48 stored in the navigation-side map DB 45 of the navigation device 1. However, since the map information is updated in units of meshes, even for the mesh specified in the update target area, for the mesh that is the latest version of map information for which there is no new version of map information to be updated, There is no need to update, and it is finally removed from the update target area.

  Next, in S11, the CPU 61 updates the navigation map information 48 stored in the navigation side map DB 45 based on the map update information received in S10. As a result, the map information in the update target area in the navigation map information 48 is rewritten with new data contents and updated to a new version of map information.

  Thereafter, in S12, the CPU 61 determines whether or not the vehicle 3 has reached the destination based on the guidance route set in S3 and the detection result of the current position detection unit 31.

  And when it determines with the vehicle having reached | attained the destination (S12: YES), the said map information update process program is complete | finished. On the other hand, if it is determined that the vehicle has not reached the destination (S12: NO), the process returns to S7, where the vehicle travel guidance, acquisition of additional guidance information 27, and update of the navigation map information 48 are performed. Continued.

  Next, a map information update processing program executed by the CPU 21 of the map distribution server 5 will be described.

  First, in S21, the CPU 21 receives a route search request transmitted from the navigation device 1 in which a predetermined operation for performing a route search has been performed. The route search request includes a user ID that specifies the navigation device 1 that is the transmission source of the route search request, and information that specifies a departure point and a destination that are search conditions for the route search.

  Next, in S22, the CPU 21 searches for a route from the departure point to the destination using the route search request received in S21 and the basic map information 25 stored in the server-side map DB 12. Then, the recommended route is specified based on the result of the route search. The route search process is performed using a known Dijkstra method or the like.

  Subsequently, in S23, the CPU 21 transmits the route information related to the recommended route specified in S22 to the navigation device 1 that has transmitted the route search request. Of the latest version of the basic map information 25 used for the route search together with the recommended route, particularly the ID for specifying the mesh around the recommended route and the information for specifying the current version of each mesh (that is, the latest version) are also transmitted. To be configured.

  Thereafter, in S24, the CPU 21 distributes the movement guide information 26 of the target area to the navigation apparatus 1 that is the distribution request source in response to the distribution request of the movement guide information 26 transmitted from the navigation apparatus 1. As described above, the area of the movement guidance information 26 to be distributed is a level 13 mesh including a guidance route within the second distance b from the current position of the vehicle (FIG. 7).

  Subsequently, in S <b> 25, the CPU 21 distributes the guidance additional information 27 of the target area to the navigation apparatus 1 that is the distribution request source in response to the distribution request for the guidance additional information 27 transmitted from the navigation apparatus 1. Note that the area of the guidance additional information 27 to be distributed is a level 13 mesh including a guidance route within the third distance c from the current position of the vehicle as described above.

  Next, in S <b> 26, the CPU 21 generates map update information 65 for updating the map information in the update target area in response to the map update information distribution request transmitted from the navigation device 1. Thereafter, the generated map update information 65 is distributed to the navigation apparatus 1 that is the distribution request source. The map update information 65 distributed in S26 updates the map information in the update target area from the current version to the latest version of the navigation map information 48 stored in the navigation device 1 that is the distribution request source. It is data to be. Since the map update information generation process and update process are already known, the details are omitted.

  As described above in detail, in the navigation device 1 according to the present embodiment, the map information updating method of the navigation device 1 and the computer program executed by the navigation device 1, the navigation map stored in the navigation side map DB 45 of the navigation device 1 is used. When the information 48 is updated, the travel guide information 26 used for the travel guidance of the navigation device 1 corresponding to the new version of the map information is obtained from the map update information 65 for an area within a predetermined distance from the current position of the vehicle 3. First, the travel guidance information 26 is obtained from the map delivery server 5 (S6), and the travel guidance information 26 is used until the update of the navigation map information 48 is completed after the travel guidance information 26 is obtained from the map delivery server 5. At the same time, after the update of the navigation map information 48 is completed, the updated navigation map information 48 is used. Therefore, when the navigation map information 48 stored in the navigation-side map DB 45 is updated to new map information, the travel guide information 26 used for the travel guidance of the vehicle 3 is first necessary and minimum. Only a limited amount can be acquired from the map distribution server 5. As a result, it is possible to perform appropriate travel guidance of the vehicle 3 along the guide route based on the latest map information without significantly increasing the processing load and cost related to communication compared to the conventional case.

Note that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the scope of the present invention.
For example, in the present embodiment, the navigation device 1 performs the determination processes of S5, S7, and S9. However, the map distribution server 5 may perform the determination process.

  In this embodiment, the guidance additional information 27 is acquired in units of 2.5 km square level 13 meshes. However, the navigation map information 48 is updated in units of areas (20 km square level 10 mesh units). As long as the area unit is narrower, area units other than level 13 mesh units (for example, level 14 mesh units or level 12 mesh units) may be used.

  In the present embodiment, the recommended route searched by the map distribution server 5 is acquired and set as the guidance route of the navigation device 1 (S3). However, a server other than the map distribution server 5 or other devices (for example, A route searched by a smartphone or a PC may be set as a guide route. However, the server or device for searching for a route needs to be a server or device having an environment capable of acquiring the latest map information.

  Moreover, in this embodiment, although the area of the movement guidance information 26 which the navigation apparatus 1 acquires from the map delivery server 5 is made into the mesh containing the guidance route within the 2nd distance b from the present position of a vehicle (FIG. 7), If the area includes the guide route of the moving distance x from the current position of the vehicle, the area can be changed as appropriate.

  In the present embodiment, an example is described in which the navigation device 1 is used as a terminal that stores map information and updates the stored map information based on data distributed from the map distribution server 5. Instead of the navigation device 1, a mobile phone, a smartphone, a PDA, a personal computer, or the like may be used. Moreover, when using a portable terminal etc., traveling guidance other than vehicles, for example, users, such as a portable terminal, a two-wheeled vehicle, etc. may be performed.

  Moreover, although the embodiment which actualized the movement guide apparatus according to the present invention has been described above, the movement guide apparatus can also have the following configuration, and in that case, the following effects can be obtained.

For example, the first configuration is as follows.
Guide route acquisition means for acquiring a guide route of a moving body, movement guide means for performing movement guidance of the mobile body along the guide route using map information stored in a map information storage medium, and the map information storage Update information acquisition for acquiring map update information for updating the map information of the area around the current position of the mobile body to a new version of the map information from the external server by communication from the map information stored in the medium And map information update means for updating the map information stored in the map information storage medium to the new version of map information based on the map update information acquired by the update information acquisition means, and the new information Movement guidance information for acquiring movement guidance information used for movement guidance by the movement guidance means corresponding to the version of map information from the external server by communication Has a resulting unit, wherein the movement guiding information obtaining means, during the up map update information acquired from the external server updates the map information stored in the map information storage medium is completed, It is determined whether the map information of the area where the mobile body is predicted to move is the new version of map information, and the map information of the area where the mobile body is predicted to move is not the new version of map information. In this case, before acquiring the map update information from the external server, the mobile guide information is acquired from the external server for an area within a predetermined distance from the current position of the mobile body, and the mobile guide means includes: From the acquisition of the travel guidance information from the external server to the completion of the update of the map information stored in the map information storage medium, the travel guidance information Using the movement guidance means, and after the update of the map information is completed, the movement guidance means is used for the movement guidance using the updated map information, and the predetermined distance is the map update It is set to a distance corresponding to the movement distance predicted to move the mobile body until the update of the map information stored in the map information storage medium after the information is acquired from the external server is completed. It is characterized by that.
According to the travel guide device having the above-described configuration, when updating the map information stored in the storage medium to new map information, only the minimum necessary amount of information used for the travel guidance of the mobile body is first stored in the external server. It becomes possible to obtain from. As a result, it is possible to perform appropriate mobile body movement guidance along the guide route based on the latest map information without significantly increasing the processing load and cost associated with communication compared to the conventional case.

The second configuration is as follows.
Guide route acquisition means for acquiring a guide route of a moving body, movement guide means for performing movement guidance of the mobile body along the guide route using map information stored in a map information storage medium, and the map information storage Communication of map update information for updating the map information of the area around the current position of the mobile body to the new version of the map information stored in the medium from the external server in units of the first area Update information acquisition means acquired by the above and map information for updating the map information stored in the map information storage medium to the new version of map information based on the map update information acquired by the update information acquisition means The travel guide information used for the travel guide by the travel guide means corresponding to the update means and the new version of the map information is a second narrower than the first area. Travel guidance information acquisition means that acquires by communication from the external server in rear units, and the travel guidance information acquisition means obtains the current position of the mobile body before acquiring the map update information from the external server. The movement guidance information is acquired from the external server for an area within a predetermined distance from the external server, and the movement guidance means acquires the movement guidance information from the external server and then stores the movement guidance information in the map information storage medium. Until the update of the map information is completed, the movement guide means performs the movement guide using the movement guide information, and after the update of the map information is completed, the movement guide means is used using the updated map information. The predetermined distance is obtained by acquiring the map update information from the external server and storing the map information stored in the map information storage medium. Until new is completed, the movable body is characterized in that it is set to a distance corresponding to the travel distance is expected to move.
According to the travel guide device having the above-described configuration, when updating the map information stored in the storage medium to new map information, only the minimum necessary amount of information used for the travel guidance of the mobile body is first stored in the external server. It becomes possible to obtain from. As a result, it is possible to perform appropriate mobile body movement guidance along the guide route based on the latest map information without significantly increasing the processing load and cost associated with communication compared to the conventional case.
The third configuration is as follows.
The update information acquisition unit acquires the map update information from the external server in a first area unit, and the movement guide information acquisition unit acquires the movement guide information in a second area unit that is narrower than the first area. And obtaining from the external server.
According to the travel guide device having the above-described configuration, the amount of travel guide information acquired from an external server can be minimized by narrowing the area unit for acquiring travel guide information.

The fourth configuration is as follows.
The movement guide information acquisition means acquires the movement guide information from the external server for an area within a predetermined distance from the current position of the moving body along the guide route, and the movement distance is calculated based on the map update information. The distance from which the moving body is predicted to move on the guide route until the update of the map information stored in the map information storage medium from the external server is completed. And
According to the travel guide device having the above-described configuration, the mobile object moves along the guide route until the map update information is acquired from the external server and the update of the map information stored in the map information storage medium is completed. Then, for the predicted area, information used for moving guidance of the moving body can be acquired from the external server first.

The fifth configuration is as follows.
The travel distance based on the average vehicle speed of the guide route and the time required to complete the update of the map information stored in the map information storage medium after acquiring the map update information from the external server Is calculated.
According to the mobile guide device having an upper Symbol configuration, it is expected to update the map information stored in the map information storage medium to obtain the map update information from the external server until complete, mobile moves It is possible to accurately calculate the movement distance. Therefore, it is possible to minimize the communication processing burden and cost increase related to the acquisition of the travel guide information.

The sixth configuration is as follows.
The predetermined distance is a distance that is equal to or greater than the movement distance and that minimizes the information amount of the movement guide information acquired from the external server.
According to the travel guide device having the above-described configuration, it is possible to set an area for acquiring travel guide information as a minimum area including an area where a mobile body may move during map update.

The seventh configuration is as follows.
The guide route acquisition means acquires the guide route searched outside based on the new version of map information by communication.
According to the travel guide device having the above configuration, when a guide route is acquired from an external device having a new version of map information, travel guidance along the guide route is performed on the side of the travel guide device having an old version of map information. It becomes possible to solve the problem that cannot be done.

DESCRIPTION OF SYMBOLS 1 Navigation apparatus 2 Map information update system 3 Vehicle 4 Map distribution center 5 Map distribution server 11 Server control ECU
12 Server-side map DB
21 CPU
22 RAM
23 ROM
25 Basic Map Information 26 Travel Guidance Information 27 Guidance Additional Information 45 Navigation Side Map DB
48 Navi Map Information 61 CPU
62 RAM
63 ROM

Claims (9)

A guide route acquisition means for acquiring a guide route of the mobile body;
Using the map information stored in the map information storage medium, movement guidance means for performing movement guidance of the moving body along the guidance route;
Of the map information stored in the map information storage medium, map update information for updating the map information in the area around the current position of the mobile body to a new version of map information is acquired from an external server by communication. Update information acquisition means,
Map information update means for updating the map information stored in the map information storage medium to the new version of map information based on the map update information acquired by the update information acquisition means;
Travel guidance information acquisition means for acquiring travel guidance information used for travel guidance by the travel guide means corresponding to the new version of map information from the external server by communication,
The movement guide information acquisition means includes
Until the update of the map information stored in the map information storage medium after acquiring the map update information from the external server is completed, the map information of the area where the mobile body is predicted to move is new. Determine whether the map information is a version,
When the map information of the area where the mobile body is predicted to move is not the new version of map information, an area within a predetermined distance from the current position of the mobile body before acquiring the map update information from the external server The travel guidance information is acquired from the external server for
The movement guidance means uses the movement guidance information to obtain the movement guidance information from the external server until the update of the map information stored in the map information storage medium is completed. Perform travel guidance, and after the update of the map information is completed, perform the travel guidance by the travel guide means using the updated map information,
The predetermined distance is a moving distance that the moving body is predicted to move between the time when the map update information is acquired from the external server and the update of the map information stored in the map information storage medium is completed. A movement guide device characterized in that the distance is set according to the distance. A guide route acquisition means for acquiring a guide route of the mobile body;
Using the map information stored in the map information storage medium, movement guidance means for performing movement guidance of the moving body along the guidance route;
Of the map information stored in the map information storage medium, map update information for updating the map information of the area around the current position of the mobile body to a new version of map information, in a first area unit Update information acquisition means for acquiring from an external server by communication;
Map information update means for updating the map information stored in the map information storage medium to the new version of map information based on the map update information acquired by the update information acquisition means;
Movement guidance information acquisition means for acquiring movement guidance information used for movement guidance by the movement guidance means corresponding to the new version of map information from the external server by communication in a second area unit narrower than the first area; Have
The travel guidance information acquisition means acquires the travel guide information from the external server for an area within a predetermined distance from the current position of the mobile body before acquiring the map update information from the external server,
The movement guidance means uses the movement guidance information to obtain the movement guidance information from the external server until the update of the map information stored in the map information storage medium is completed. Perform travel guidance, and after the update of the map information is completed, perform the travel guidance by the travel guide means using the updated map information,
The predetermined distance is a moving distance that the moving body is predicted to move between the time when the map update information is acquired from the external server and the update of the map information stored in the map information storage medium is completed. A movement guide device characterized in that the distance is set according to the distance. The update information acquisition means acquires the map update information from the external server in a first area unit,
The movement guide apparatus according to claim 1 , wherein the movement guide information acquisition unit acquires the movement guide information from the external server in units of a second area that is narrower than the first area. The movement guidance information acquisition means acquires the movement guidance information from the external server for an area within a predetermined distance from the current position of the moving body along the guidance route,
The moving distance is obtained when the moving body moves on the guide route between the time when the map update information is acquired from the external server and the update of the map information stored in the map information storage medium is completed. The movement guide device according to claim 1 , wherein the distance is an estimated distance. The travel distance based on the average vehicle speed of the guide route and the time required to complete the update of the map information stored in the map information storage medium after acquiring the map update information from the external server The movement guide device according to any one of claims 1 to 4, wherein the movement guide device is calculated. At the predetermined distance is the travel distance or more, and according to any one of claims 1 to 5 information of the mobile guide information acquired from the external server, characterized in that the distance becomes minimum Travel guidance device. The travel guidance device according to any one of claims 1 to 6, wherein the guide route acquisition unit acquires the guide route searched outside based on the new version of the map information by communication. . A travel guide having a guide route acquisition means for acquiring a guide route of a mobile object, and a travel guide means for performing a mobile guide of the mobile object along the guide route using map information stored in a map information storage medium. A method for updating map information of a device,
Update information acquisition means, the map update information for updating the map information of the area around the current position of the mobile body to a new version of the map information among the map information stored in the map information storage medium, Obtaining from an external server by communication;
A step of updating the map information stored in the map information storage medium to the new version of map information based on the map update information acquired by the update information acquisition unit;
The travel guidance information acquisition means has a step of acquiring the travel guide information used for the travel guidance by the travel guide means corresponding to the new version of the map information from the external server by communication,
The movement guide information acquisition means includes
Until the update of the map information stored in the map information storage medium after acquiring the map update information from the external server is completed, the map information of the area where the mobile body is predicted to move is new. Determine whether the map information is a version,
When the map information of the area where the mobile body is predicted to move is not the new version of map information, an area within a predetermined distance from the current position of the mobile body before acquiring the map update information from the external server The travel guidance information is acquired from the external server for
The movement guidance means uses the movement guidance information to obtain the movement guidance information from the external server until the update of the map information stored in the map information storage medium is completed. Perform travel guidance, and after the update of the map information is completed, perform the travel guidance by the travel guide means using the updated map information,
The predetermined distance is a moving distance that the moving body is predicted to move between the time when the map update information is acquired from the external server and the update of the map information stored in the map information storage medium is completed. A map information updating method for a movement guide device, characterized in that the distance is set according to the distance. A travel guide having a guide route acquisition means for acquiring a guide route of a mobile object, and a travel guide means for performing a mobile guide of the mobile object along the guide route using map information stored in a map information storage medium. A computer program for updating device map information,
Computer
Of the map information stored in the map information storage medium, map update information for updating the map information in the area around the current position of the mobile body to a new version of map information is acquired from an external server by communication. Update information acquisition means,
Map information update means for updating the map information stored in the map information storage medium to the new version of map information based on the map update information acquired by the update information acquisition means;
The movement guidance information used for the movement guidance by the movement guidance means corresponding to the new version of the map information functions as movement guidance information acquisition means for acquiring from the external server by communication, and
The movement guide information acquisition means includes
Until the update of the map information stored in the map information storage medium after acquiring the map update information from the external server is completed, the map information of the area where the mobile body is predicted to move is new. Determine whether the map information is a version,
When the map information of the area where the mobile body is predicted to move is not the new version of map information, an area within a predetermined distance from the current position of the mobile body before acquiring the map update information from the external server The travel guidance information is acquired from the external server for
The movement guidance means uses the movement guidance information to obtain the movement guidance information from the external server until the update of the map information stored in the map information storage medium is completed. Perform travel guidance, and after the update of the map information is completed, perform the travel guidance by the travel guide means using the updated map information,
The predetermined distance is a moving distance that the moving body is predicted to move between the time when the map update information is acquired from the external server and the update of the map information stored in the map information storage medium is completed. A computer program characterized by being set to a distance according to

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