JP2004085245A - Mobile object navigation device, map information distribution device, map information distribution system, and map information distribution method - Google Patents

Abstract

A mobile object navigation device, a map information distribution device, and map information that can reduce communication time and communication cost spent for updating by distributing minimum updated map information along a guide route of the mobile object. A distribution system and a map information distribution method are obtained.
A moving object position detecting means (114 to 116), a map information storage means (112), an input means (113) for inputting a route point, and a route search for searching a guide route passing through a route point from a current position based on map information. Means, an output means 117 for displaying the searched guidance route, a communication means 111 for acquiring map information updated from the outside, and an updating means for updating the map information by this means. By transmitting the section information of the map information along the route and the new / old identification information to the outside, the updated map information along the guide route is acquired from outside.
[Selection] Fig. 2

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the field of mobile navigation devices, and more particularly to map information distribution for acquiring map information updated by communication, and a map information distribution device, a map information distribution system, and a map information distribution associated therewith. It is about the method.
[0002]
[Prior art]
2. Description of the Related Art In recent years, mobile body navigation devices that display the current position of a mobile body on a map and search for and guide an optimal route to a destination have been actively developed. In such a mobile navigation device, it is becoming possible to provide various kinds of information effective for a user to safely, smoothly, and comfortably travel to a destination based on map information. For example, route guidance information to the destination, intersection guidance information, road congestion information, information on the distance to the destination and expected arrival time, facility guidance information around the route, and the like are provided.
[0003]
The map information that serves as the basis for providing this information needs to be updated periodically because the actual roads and facilities are constantly being modified, newly constructed, or abolished. In general, a storage medium such as a CD-ROM (Compact Disc-Read Only Memory) or a DVD-ROM (Digital Versatile Disk-Read Only Memory) in which the information is stored is replaced with the latest one. However, recently, with the advent of mobile navigation devices equipped with an HDD (Hard Disk Drive) recording map information and the development of broadband wireless communication technology, there have been various methods for distributing the latest map information using wireless communication. Proposed.
[0004]
For example, Japanese Patent Application Laid-Open No. H11-257975 discloses a method in which map data is divided by a predetermined method, version information is added, version information is compared, and the data is transferred only when new. A method is disclosed in which unnecessary data transfer is omitted and the transfer time is shortened. This navigation device has an update data storage unit for storing data from a traffic information center. The map data is divided into predetermined areas by meridians and parallels, and map drawing data and hospital data are stored. Data of each type such as position data is collected and configured, and a common header including version information and the like is added to each data. When the user specifies the data to be updated and the area using the operation unit, it is checked whether the data is stored in the update data storage unit or the CD-ROM, and the version information is added. The data request signal is sent to the traffic information center by the communication device, and the data is updated only when the data version of the traffic information center is new.
[0005]
Japanese Patent Application Laid-Open No. 9-90869 discloses that even when the latest CD-ROM storing the map data is not obtained, the map data reflecting the latest road conditions and the like is stored in the terminal device. A method for making it possible to obtain the information is disclosed. This map-related information distribution system includes a host system having a map database, and a plurality of terminal devices that receive the map data and the map-related data. An updated partial map database for storing updated partial map data is provided in the host system, and in response to a request from any of the terminal devices, updated partial map data corresponding to the position identification information included in the request. -Reading out the updated partial map data from the updated partial map database and returning it to the request source, and the requesting terminal device stores the updated partial map data received from the host system in the updated map data storage means and displays it. Display in the section.
[0006]
Japanese Patent Application Laid-Open No. 2001-229369 discloses that when the content of map data is updated, even if it is a part of the content of map data, it can be easily updated. A method for realizing a map data storage device capable of reading out the latest map data of the present invention is disclosed. This map data storage device is a portable storage unit such as a CD-ROM which stores map data divided for each unit map data (mesh) and stores updated map data received through a communication terminal. In addition to storing the unit map data, it has an auxiliary storage unit such as an HDD for storing information for specifying the updated unit map data and information of the storage location. When the map data is read, it is determined whether or not there is updated unit map data in the map data to be read by referring to the auxiliary storage unit. If there is unit map data, the unit map data is read from the auxiliary storage unit, and map data other than the updated unit map data is read from the portable storage unit.
[0007]
[Problems to be solved by the invention]
However, in the conventional apparatuses and systems as described above, the user needs to manually specify the data and area to be updated on a menu or a map, and the updating operation is complicated, or the user can specify the area. Depending on the area, there are problems such as a long communication time required to transfer all the map data and an increase in communication cost.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and reduces communication time and communication cost spent for updating by distributing a minimum of updated map information along a guide route of a mobile object. It is an object of the present invention to obtain a mobile object navigation device, a map information distribution device, a map information distribution system, and a map information distribution method that can perform the operation.
[0009]
[Means for Solving the Problems]
In the moving object navigation apparatus according to the present invention, a position detecting means for detecting a current position of the moving object, a map information storing means for storing map information, an input means for inputting a route point, and a current position based on the map information A route searching means for searching for a guide route passing through a route point from an output means for displaying or guiding the searched guide route by image or voice, a communication means for obtaining map information updated by communication from outside, Updating means for updating the map information stored in the map information storage means with the updated map information, wherein the communication means transmits the segment information of the map information along the guide route and the old and new identification information to the outside, The map information updated along the guide route is acquired from outside.
[0010]
Further, the communication means in the mobile navigation apparatus according to the present invention is configured to preferentially acquire, from among the updated map information along the guide route, map information close to the current position of the mobile body.
[0011]
Further, when part or all of the map information along the guide route is updated, the route search means in the mobile navigation device according to the present invention re-generates part or all of the guide route based on the updated map information. It is designed to be searched.
[0012]
In the map information distribution device according to the present invention, the map information along the guide route is updated by receiving the segment information of the map information including the guide route of the moving object and the new / old identification information from the moving object. It is intended to be distributed to mobile objects.
[0013]
Further, in the map information distribution device according to the present invention, of the updated map information along the guide route, map information close to the current position of the moving object is preferentially distributed.
[0014]
Further, in the map information distribution system according to the present invention, a position detecting means for detecting a current position of the moving object, a map information storing means for storing map information, an input means for inputting a route point, and Route search means for searching for a guide route passing through a route point from the current position, output means for displaying or guiding the searched guide route by image or voice, and map information updated by communication from an external map information distribution device. Communication means for acquiring, and updating means for updating the map information stored in the map information storage means with the updated map information, wherein the communication means stores the segment information of the map information along the guide route and the old and new identification information. A mobile navigation system that obtains updated map information along a guide route from the map information distribution device by transmitting the map information to the map information distribution device. Map information distribution for distributing the updated map information along the guide route to the mobile navigation device by receiving the device and the segment information of the map information along the guide route and the old and new identification information from the mobile navigation device It is provided with a device.
[0015]
Further, in the map information distribution system according to the present invention, of the updated map information along the guide route, map information close to the current position of the moving object is preferentially distributed.
[0016]
Also, in the map information distribution method according to the present invention, the step of transmitting the segment information of the map information along the guide route and the old and new identification information from the mobile body to the map information distribution device includes the step of transmitting the updated information along the guide route. Delivering the map information from the map information delivery device to the mobile object.
[0017]
In the map information distribution method according to the present invention, among the updated map information along the guide route, map information close to the current position of the moving object is preferentially distributed.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing a system configuration at the time of updating map information of a navigation device according to Embodiment 1 of the present invention. Here, a configuration of a map information distribution system when applied to a navigation device mounted on a vehicle as a moving object is shown.
[0019]
The vehicle 100 is equipped with a navigation device 110 and a communication device 111 as communication means using a mobile phone or the like. On the other hand, the information center 200 is provided with a map information distribution device including a communication device 210 and a storage device 220 storing the latest map information. The navigation device 110 transmits and receives data to and from the information center 200 via the communication devices 111 and 210.
[0020]
FIG. 2 is a block diagram illustrating a device configuration of the navigation device 110.
Reference numeral 120 denotes a navigation processing unit, and reference numeral 112 denotes a map information storage device such as an HDD that stores map information as map information storage means. Reference numeral 113 denotes an input device as input means provided with various operation switches for operating the navigation device 110 and inputting route points such as a waypoint and a destination. Reference numeral 111 denotes the communication device described above, and reference numeral 114 denotes a GPS receiving device that receives a GPS signal transmitted from a GPS satellite and detects the latitude and longitude of the current position of the vehicle. Reference numeral 115 denotes a gyro sensor for detecting the direction of the vehicle. Reference numeral 116 denotes a vehicle speed sensor for generating a pulse at every predetermined traveling distance. These self-contained navigation sensors and the GPS receiver 114 constitute a position detecting means, and an accurate vehicle Detect current position, speed and direction of Reference numeral 117 denotes a display device as output means such as a liquid crystal display. The navigation processing unit 120 displays a map around the current position of the vehicle, a guide route from the current position to the destination, and various facility marks around the display device 117. , And other guidance information. It should be noted that, as the output means, a sound output means such as a speaker may be used in combination to provide various guidances by voice.
[0021]
The navigation processing unit 120 includes a CPU (Central Processing Unit) 121 for performing various arithmetic processing and control processing, a RAM (Random Access Memory) 122 for temporarily storing various processing data, and a ROM (Read Only Memory) storing various programs. 123 is provided. A GPS receiver 114, a gyro sensor 115, a vehicle speed sensor 116, a display device 117, an input device 113, a communication device 111, and a map information storage device 112 are connected via each interface circuit. It controls data transmission and reception.
[0022]
Further, the navigation processing unit 120 obtains the information via the communication device 111 via a route search unit that performs a route search process for searching for a guide route passing through a route point from the current position based on the map information stored in the map information storage device 112. An update unit is provided for updating the map information stored in the map information storage device 112 with the updated map information.
[0023]
The map information stored in the map information storage device 112 is divided into rectangular areas divided by straight lines parallel to meridians and parallels, and the map information of each section includes section information such as a different section number and the like. New and old identification information such as a version number is added. When distributing the updated map information, the information center 200 distributes the data for each section as one unit.
[0024]
Next, the operation of the navigation device 110 configured as described above when updating the map information will be described.
FIG. 3 is a flowchart showing a schematic operation of the navigation device 110 when updating the map information. 4 shows a configuration example of map information along the guide route, and FIG. 5 shows a configuration example of updated map information along the guide route.
[0025]
First, in the navigation device 110 of the vehicle 100, when a user inputs a destination using the input device 113, the navigation processing unit 120 performs a GPS receiving device 114 and a gyro sensor 115 based on the map information stored in the map information storage device 112. Then, a search is made for a guidance route from the current position detected by the vehicle speed sensor 116 to the input destination (step S11). For example, a route (a → b → c → d → e → f → g) indicated by a bold line in FIG. 4 indicates a searched guidance route on a map divided into predetermined sections.
[0026]
Next, the priority at the time of route guidance is assigned to each map information of the section along the guide route from 1 to N (step S12). For example, in FIG. 4, among the sections A to G along the guide route (a → b → c → d → e → f → g), the priority of the map information of the section A including the current position is set to 1, and the current A priority is assigned to the map information of each section in the order close to the position (in the order of A, B, C, D, E, F, G).
[0027]
Next, communication with the information center 200 is performed via the communication device 111, and the respective block information and the new and old identification information are assigned to the information center 200 in the order of priority 1 to N assigned to the map information of the blocks along the guide route. (Step S13).
[0028]
The information center 200 checks whether the map information of the corresponding section stored in the storage device 220 is newer than the map information in the vehicle 100 based on the section information transmitted from the vehicle 100 and the old and new identification information. If new map information exists, the map information of the section is returned to the vehicle 100 if it does not exist (step S21).
[0029]
The vehicle 100 receives the information from the information center 200 (step S14), and checks whether or not the received information includes updated map information (step S15). If updated map information exists, the map information of the corresponding section in the map information stored in the map information storage device 112 is written and updated (step S16).
[0030]
Next, it is confirmed whether or not at present the possible update of all the map information of the section along the guide route to which the priorities 1 to N have been allocated has been completed (step S17). S13 to S17 are repeated. When the search is completed, the guidance route from the current position to the destination is searched again based on the map information updated by the route search means (step S18).
[0031]
At this time, a new road that is not in the map information before the update exists in the updated map information, and if the road is valid as a guide route, it is set as a part of the new guide route. For example, in FIG. 5, sections B-2, C-2, D-2, E-2, and F-2 are updated map information, and the roads indicated by broken lines included in the updated map information are maps before the update. An example of a new road that is not included in the information is shown. The guidance route (a → b → b2 → d → f2 → f → g) passing through the new road is the guidance route (a → b → c →) indicated by the bold line searched based on the map information before update. d → e → f → g), the guidance route through the new road is searched again and set.
[0032]
In step S18, when re-searching the guide route from the current position to the destination based on the map information updated by the route search means, only a part of the map information of the sections A to G along the guide route is used. When updated, only the route portion belonging to the updated section of all the guide routes may be searched again. For example, in FIG. 5, since the sections B-2, C-2, D-2, E-2, and F-2 are updated map information, they are indicated by thick lines searched based on the map information before update. Of the guidance route (a → b → c → d → e → f → g), only the route portion (b → c → d → e → f) belonging to the above section is searched again, and is indicated by a broken line. The guide route (b → b2 → d → f2 → f) passing through the new road may be reset. Thereby, the re-search time can be reduced.
[0033]
By updating the map information by the method described above, only the minimum map information necessary for traveling from the current position to the destination can be updated quickly and inexpensively, and the latest optimal route based on this can be determined. Since guidance can be provided, comfortable vehicle traveling can be realized.
[0034]
According to the first embodiment, GPS receiving device 114 for detecting the current position of vehicle 100, gyro sensor 115, vehicle speed sensor 116, map information storage device 112 for storing map information, and input device 113 for inputting route points And a route searching means for searching for a guide route passing through the route point from the current position based on the map information, a display device 117 for displaying the searched guide route, and acquiring updated map information from the information center 200 through communication. A communication device 111; and updating means for updating the map information stored in the map information storage device 112 with the updated map information. The communication device 111 includes the segment information of the map information along the guide route and the old and new identification information. Is transmitted to the information center 200 to update the map information along the guide route from the information center 200. Since so as to obtain, it is possible to reduce the communication time and communication cost to spend the update by obtaining the minimum of the updated map information along the guidance route.
[0035]
According to the first embodiment, the communication device 111 preferentially acquires the map information close to the current position of the vehicle 100 from among the updated map information along the guide route. Can provide preferentially updated map information around the current position that is most necessary for the user to move along the guide route.
[0036]
Also, according to the first embodiment, when part or all of the map information along the guide route is updated, the route search means re-searches a part or all of the guide route based on the updated map information. Therefore, a guidance route based on the latest map information can be provided.
[0037]
Embodiment 2 FIG.
Next, in the above-described first embodiment, an example in which the present invention is applied to a navigation device mounted on a vehicle as a moving object has been described. The present invention may be applied to a portable information terminal device (portable terminal) such as a PDA (Personal Digital Assistant), a mobile phone, and a PHS (Personal Handyphone System) which are carried when traveling while riding on a motorcycle, a wheelchair, or another moving object. . The system configuration in this case corresponds to a configuration in which the vehicle 100 in FIG. 1 is replaced by the user himself and the navigation device 100 is replaced by a portable terminal.
[0038]
According to this, the communication time and communication cost spent for updating can be reduced by acquiring the minimum updated map information along the guide route of the user who carries the portable terminal, and the communication means can be reduced. Since the driving time can be shortened, the battery life of the portable terminal can be extended.
[0039]
Also, by providing the latest map information along the guide route, a mobile terminal that can support safe and reliable movement of the user can be obtained.
[0040]
In the embodiment, an example in which the GPS receiver 114, the gyro sensor 115, the vehicle speed sensor 116, and the like are used as the position detecting means has been described. However, other sensors such as a geomagnetic sensor, an acceleration sensor, A wireless network such as GPS (Differential GPS) or a location information service in a PHS or a mobile phone may be used.
[0041]
Further, in the embodiment, an example in which the map information storage device 112 in which the map information is stored in, for example, an HDD is used as the map information storage means. However, the present invention is not limited to this. Memory IC (Integrated Circuit) such as Flash Memory, CD-R (Recordable), DVD-R, CD-RW (Rewritable), DVD-RW, DVD-RAM (Random Access Memory), MD (Digital Memory), etc. Use optical disks, magnetic disks such as flexible disks, memory cards such as IC memory cards, magnetic memory cards, optical memory cards, magnetic tapes such as cassette tapes, and other readable and writable nonvolatile information storage media. Or it may be was.
[0042]
Further, in the embodiment, the example in which the input device 113 such as the operation switch is used as the input means has been described. A device may be used.
[0043]
Further, in the embodiment, an example in which the display device 117 such as a liquid crystal display is used as an output unit has been described. However, a CRT (Cathode Ray Tube, cathode ray tube) display, a plasma display, an EL (Electro Luminescence, electroluminescent) display, Various other displays such as LED (Light Emitting Diode, light emitting diode) display, VFD (Vacuum Fluorescent Display, fluorescent display) display, projection type display, head-up display, head mounted display, speaker, headphone, earphone, sound A sound output unit such as a synthesizer or another output device such as a printer may be used.
[0044]
Further, in the embodiment, the example in which the communication device 111 such as a mobile phone is used as the communication means has been described. However, other devices such as a car phone, a satellite phone, an MCA radio, a business radio, a power-saving radio, etc. Wireless communication devices, road-to-vehicle communication systems such as ETC (Electronic Toll Collection System, automatic toll collection system for toll roads), DSRC (Dedicated Short Range Communication, narrow-area communication), and communication networks such as satellite communication and the Internet. It may be used.
[0045]
Further, in the embodiment, the case where road information is mainly used as the map information has been described. However, the present invention is not limited to this, and can be widely applied to information related to the map, such as traffic congestion and regulation. Similarly, the traffic information, facility / store information, event information, sightseeing information, weather information, etc. are updated along the guide route, and based on these updated information, the guide route is re-searched, displayed and output by voice. Alternatively, the same effect can be obtained.
[0046]
Further, in the embodiment, the example in which the present invention is applied to the navigation device 110 mounted on the vehicle 100 and the portable terminal carried by the user is mainly described, but the present invention is applied to other moving objects such as trains, ships, and aircraft. The present invention may be applied to a mounted navigation system or other various types of mobile information systems, and it is needless to say that a similar effect can be obtained in such a case.
[0047]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
[0048]
ADVANTAGE OF THE INVENTION According to the mobile body navigation apparatus which concerns on this invention, the position detection means which detects the present position of a mobile body, the map information storage means which stores map information, the input means which inputs a route point, Route search means for searching for a guide route passing through a route point from a position, output means for displaying or guiding the searched guide route by image or voice, and communication means for acquiring map information updated by communication from outside; Updating means for updating the map information stored in the map information storing means with the updated map information, wherein the communication means transmits the segment information of the map information along the guide route and the old / new identification information to the outside. , Since the map information updated along the guide route is obtained from outside, the minimum updated map information along the guide route is obtained. There is an effect that it is possible to reduce the communication time and communication cost spent on updated with.
[0049]
Further, according to the mobile object navigation device according to the present invention, the communication means preferentially acquires the map information close to the current position of the mobile object from among the updated map information along the guide route. Thus, there is an effect that updated map information around the current position, which is the most necessary for the moving body to move along the guide route, can be preferentially provided.
[0050]
Further, according to the mobile navigation device of the present invention, when a part or all of the map information along the guide route is updated, the route search unit performs a part of the guide route based on the updated map information. Since the whole is searched again, there is an effect that a guidance route based on the latest map information can be provided.
[0051]
According to the map information distribution device of the present invention, the map information along the guide route is updated by receiving the segment information of the map information including the guide route of the moving object and the old and new identification information from the moving object. Is distributed to the moving object, and by distributing the minimum updated map information along the guide route, the communication time and the communication cost spent for updating can be reduced.
[0052]
Further, according to the map information distribution device according to the present invention, among the updated map information along the guide route, map information close to the current position of the moving object is preferentially distributed, so that the moving object There is an effect that updated map information around the current position, which is most necessary for moving along the guide route, can be preferentially distributed.
[0053]
Further, according to the map information distribution system according to the present invention, position detecting means for detecting the current position of the moving object, map information storing means for storing map information, input means for inputting a route point, and Route search means for searching for a guide route passing through a route point from the current position, output means for displaying or guiding the searched guide route by image or voice, and map information updated by communication from an external map information distribution device And update means for updating the map information stored in the map information storage means with the updated map information, wherein the communication means comprises section information of the map information along the guide route and old and new identification information. Moving body navigation that obtains the updated map information along the guide route from the map information distribution device by transmitting the map information to the map information distribution device. Map information that distributes the updated map information along the guide route to the mobile navigation device by receiving the location information and the segment information of the map information along the guide route and the old and new identification information from the mobile navigation device. Since the apparatus is provided, it is possible to reduce the communication time and communication cost spent for updating by distributing the minimum updated map information along the guide route.
[0054]
Further, according to the map information distribution system according to the present invention, among the updated map information along the guide route, map information close to the current position of the moving object is preferentially distributed, so that the moving object There is an effect that updated map information around the current position, which is most necessary for moving along the guide route, can be preferentially distributed.
[0055]
Further, according to the map information distribution method according to the present invention, the step of transmitting the segment information of the map information along the guide route and the old and new identification information from the moving object to the map information distribution device, and updating the map information along the guide route And a step of distributing the map information from the map information distribution device to the moving object, thereby distributing the minimum updated map information along the guide route, thereby reducing communication time and communication cost spent for updating. There is an effect that it can be reduced.
[0056]
According to the map information distribution method according to the present invention, the map information close to the current position of the moving object is preferentially distributed among the updated map information along the guide route, so that the moving object There is an effect that updated map information around the current position, which is most necessary for moving along the guide route, can be preferentially distributed.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a system configuration at the time of updating map information of a navigation device according to Embodiment 1 of the present invention.
FIG. 2 is a block diagram showing a device configuration of the navigation device according to the first embodiment of the present invention.
FIG. 3 is a flowchart showing a schematic operation when updating the map information of the navigation device according to the first embodiment of the present invention.
FIG. 4 is a diagram showing a configuration example of map information along a guide route of the navigation device according to the first embodiment of the present invention.
FIG. 5 is a diagram showing a configuration example of updated map information along a guide route of the navigation device according to the first embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 100 vehicle, 110 navigation device, 111 communication device, 112 map information storage device, 113 input device, 114 GPS receiving device, 115 gyro sensor, 116 vehicle speed sensor, 117 display device, 120 navigation processing unit, 121 CPU, 122 RAM, 123 ROM, 200 information center, 210 communication device, 220 storage device.

Claims (9)

A position detecting means for detecting a current position of the moving object, a map information storing means for storing map information, an input means for inputting a route point, and a guidance route passing through the route point from the current position based on the map information. Route searching means for searching, output means for displaying or guiding the searched guidance route by image or voice, communication means for obtaining map information updated by communication from outside, and Updating means for updating the map information stored in the map information storage means, wherein the communication means transmits the section information of the map information along the guide route and the old / new identification information to the outside to thereby provide the guidance from outside. A mobile navigation device, which acquires updated map information along a route. 2. The mobile object navigation device according to claim 1, wherein the communication unit preferentially acquires map information close to the current position of the mobile object from the updated map information along the guide route. 2. The route search means according to claim 1, wherein when part or all of the map information along the guide route is updated, a part or all of the guide route is searched again based on the updated map information. Mobile navigation device. Map information characterized by distributing updated map information along the guide route to a mobile object by receiving section information and new / old identification information of map information including a guide route of the mobile object from the mobile object. Delivery device. 5. The map information distribution device according to claim 4, wherein, of the updated map information along the guide route, the map information close to the current position of the moving object is preferentially distributed. A position detecting means for detecting a current position of the moving object, a map information storing means for storing map information, an input means for inputting a route point, and a guidance route passing through the route point from the current position based on the map information. Route searching means for searching, output means for displaying or guiding the searched guidance route by image or voice, communication means for obtaining map information updated by communication from an external map information distribution device, Update means for updating the map information stored in the map information storage means with the map information obtained, wherein the communication means transmits the map information section information and the old / new identification information along the guide route to the map information distribution device. A mobile navigation device that acquires the updated map information along the guide route from the map information distribution device by transmitting, Map information distribution that distributes the updated map information along the guide route to the mobile navigation device by receiving the section information of the map information along the internal route and the old and new identification information from the mobile navigation device. A map information distribution system comprising a device. 7. The map information distribution system according to claim 6, wherein, of the updated map information along the guide route, map information close to the current position of the moving object is preferentially distributed. Transmitting the section information of the map information along the guide route and the old / new identification information from the mobile unit to the map information distribution device; and updating the map information along the guide route from the map information distribution device to the mobile unit. And delivering the map information to a map information distribution method. 9. The map information distribution method according to claim 8, wherein, of the updated map information along the guide route, map information close to the current position of the moving object is preferentially distributed.

Images