JP5104184B2 - Navigation device and display method - Google Patents

Description

  The present invention relates to a navigation device and a display method.

2. Description of the Related Art Conventionally, in-vehicle navigation devices are known that connect to an information providing device such as a server and acquire content information and the like from the information providing device. For example, Patent Document 1 describes a navigation system that receives road traffic information by connecting to an information providing apparatus via a DSRC (Dedicated Short Range Communication) base station.
JP 2007-132747 A

  By the way, the content information received from the information providing device includes immediate type information provided on the navigation device side within one second after reception and the position information of the information providing position, and when the vehicle reaches the information providing position. And storage-type information to be provided.

  However, conventionally, the storage type information is only provided when the vehicle reaches the information providing position. Therefore, until the user reaches the information provision position, whether or not there is storage-type information provided around the guidance route, and a point where an event notified by the provided storage-type information occurs It was not possible to know whether or not there existed.

  An object of the present invention is to enable a user to recognize the presence of content information provided around a guidance route in a navigation device.

In order to solve the above-mentioned problem, the invention described in claim 1
Route search means for searching for a guidance route from the vehicle position to the destination, and a map screen around the vehicle position are displayed on the display means, and the searched guidance route is displayed on the map screen to provide route guidance. In a navigation device comprising route guidance means for performing
Receiving means for receiving content information including information indicating an event occurrence position; content relating to information indicating the event occurrence position; and information indicating an information providing position for providing the content to a user ;
Storage means for storing the received content information;
The information providing position within a predetermined range from the guidance route, and control means for displaying the images information on the map screen,
Is provided.

The invention according to claim 2 is the invention according to claim 1 ,
The control means displays the event occurrence position within a predetermined range from the guidance route as image information on the map screen .

The invention according to claim 3 is the invention according to claim 1 ,
The control means sets a priority for each received content information, and when the receiving means newly receives content information, there is a free space in the storage means that can store the received content information. Whether or not the received content information is discarded based on the received content information and the priority of the content information already stored in the storage means, The content information with low priority stored in the storage means is deleted.

The invention according to claim 4 is the invention according to claim 3 ,
The priority is set based on the event occurrence position of the content information and the distance of the information providing position from the guidance route.

The invention described in claim 5
Route search means for searching for a guidance route from the vehicle position to the destination, and a map screen around the vehicle position are displayed on the display means, and the searched guidance route is displayed on the map screen to provide route guidance. A route guidance means, and a display method in a navigation device comprising:
Receiving content information including information indicating an event occurrence position, content relating to the information indicating the event occurrence position, and information indicating an information providing position for providing the content to a user ;
Storing the received content information in a storage means;
A step of displaying the information providing position within a predetermined range from the guidance route, as the images information on the map screen,
including.

  According to the present invention, in the navigation device, the user can recognize the presence of content information provided around the vehicle position.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.

In FIG. 1, the outline | summary of the DSRC system 100 and the navigation apparatus 2 is shown.
Here, the DSRC system is a system introduced as part of ITS (Information & Communication System: Road Traffic Information Communication System), and within a limited communication area of several meters to several tens of meters, This is a communication system that enables transmission / reception of information to / from a vehicle-mounted device (for example, a navigation device) having a DSRC function.
As shown in FIG. 1, the DSRC system 100 includes n roadside wireless devices 11 to 1n and a server 3 connected to the roadside wireless devices 11 to 1n via a communication network N. The roadside radio apparatuses 11 to 1n have DSRC antennas 11a to 1na, respectively.

The roadside wireless devices 11 to 1n are installed on roadsides, above roads, roadside stations, parking lots, etc., respectively, and radiate DSRC radio waves with extremely limited reach from the DSRC antennas 11a to 1na to perform predetermined communication. Bidirectional narrow-area wireless communication is performed with a navigation device 2 having a DSRC function mounted on a vehicle that stops or passes in the area. The roadside apparatuses 11 to 1n are connected to the server 3 through a communication network N such as a DSRC dedicated IP network so that data can be transmitted and received. When the communication with the navigation device 2 is established, the roadside wireless devices 11 to 1n notify the server 3 that they are connected, receive content information from the server 3, and transmit the content information to the navigation device 2.
The server 3 is a server managed by a service provider, and has a large volume of content information (road traffic information, advertisements, etc.) requested to be distributed by information providers (road traffic organizations, companies that operate various facilities, etc.). It is a device that accumulates in a storage device and distributes it to the navigation device 2 that is communicably connected to the roadside wireless devices 11 to 1n as necessary. The server 3 can deliver the content information corresponding to the area depending on the area where each of the roadside wireless devices 11 to 1n established with the navigation device 2 is established.

  The navigation device 2 has a DSRC function for performing communication based on DSRC with the roadside wireless devices 11 to 1n, and a navigation function for displaying a current position of a vehicle (own vehicle) on which the navigation 2 is mounted and a route guidance to a destination. It is an apparatus provided with.

In FIG. 2, the functional structural example of the navigation apparatus 2 is shown.
As shown in FIG. 2, the navigation device 2 includes a control unit 20, an operation input unit 21, a display unit 22, a voice output unit 23, a hard disk device 24, a received information storage unit 25, a GPS (Global Positioning System) module 26, an autonomous system. A navigation unit 27, a VICS (Vehicle Information and Communication System) module 28, a DSRC transmission / reception unit 29, and the like are provided.

  The control unit 20 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The CPU of the control unit 20 reads and executes the system program stored in the ROM, and drives and controls each unit of the navigation device 2. Further, the CPU reads various processing programs stored in the ROM based on information input via the operation input unit 21, the GPS module 26, the VICS module 28, the DSRC transmission / reception unit 29, etc., and develops them in the RAM. Then, various processes are executed according to the developed program.

  For example, when the destination is set via the operation input unit 21 and a route search is instructed, the control unit 20 executes a route search process, and from the map information stored in the hard disk device 24, the node (intersection) , Coordinate information of nodes such as branch points and inflection points) and road information including link (straight path connecting two nodes) information is read, and the current position of the vehicle according to various conditions based on the read road information A route (for example, a standard route, a route with the shortest distance, a route with the lowest charge, a route with the shortest time, etc.) from the (own vehicle position) to the destination is searched. When the route search processing is completed, the control unit 20 causes the display unit 22 to display a selection screen for the user to select a guidance route to be used for route guidance among the searched routes, and selects from the operation input unit 21. In response to the input, one of the searched routes is set as a guidance route to be used for route guidance, and stored in the RAM as a route search result.

  In addition, when the route guidance is instructed via the operation input unit 21, the control unit 20 performs route guidance processing, based on the vehicle position output from the GPS module 26 and the like and the search result of the route search processing. , Data necessary for route guidance (map information, facility information, guide map data, etc. near the vehicle location) is read from the hard disk device 24 and stored in the RAM, and the route guidance is displayed on the display unit 22 or the route guidance Audio is output from the audio output unit 23.

  In addition, the control unit 20 executes a storage type information icon display process to be described later, and is received by the DSRC transmission / reception unit 29 on the map screen displayed on the display unit 22 and stored in the reception information storage unit 25. Icons are displayed at event occurrence positions and information provision positions of content information. In this embodiment, the case where an icon is displayed at the event occurrence position or information provision position of content information will be described as an example. However, image information such as a balloon, annotation (annotation), symbol, character, etc., is displayed. It is good.

Here, the content information transmitted from the server 3 includes immediate type information and storage type information.
Immediate type information is content information provided (reproduced) by the navigation device 2 within one second after being received. When the immediate type information is received by the DSRC transmission / reception unit 29, the control unit 20 temporarily stores the received information in the RAM, and displays the received immediate type information content immediately on the display unit 22 and / or the audio output unit. 23 for playback. After reproduction, the immediate type information is deleted from the RAM.

On the other hand, the storage type information is content information provided by an image and / or sound when the vehicle on which the navigation device 2 is mounted, that is, the own vehicle reaches a predetermined information providing position, and the event occurrence position is determined. Information indicating the information providing position where the content is to be provided.
The event occurrence position refers to the position of the point where the event notified by the content has occurred. For example, when the content of the accumulation type information is content related to a lunch service of a certain restaurant, the event occurrence position indicates the position where the restaurant exists. In addition, when the content of the storage type information is content related to a rockfall accident, the event occurrence position indicates the position of the site of the rockfall accident.
The information providing position may be determined as a point or an area. In the present embodiment, it is assumed that the position where the storage type information is provided is defined as the information providing area.

  FIG. 3 shows the relationship between the event occurrence position and the information provision area. P1 in FIG. 3 indicates an event occurrence position on the map. A1 to A4 in FIG. 3 indicate information providing areas for content information related to the event occurrence position P1. As shown in FIG. 3, the information provision areas A1 to A4 are set in advance on a road toward the event occurrence position P1, for example. These information provision areas A1 to A4 are specified by information provision position information including information (latitude and longitude) of the central coordinates O1 to O4, information of the radii R1 to R4, and information of the traveling direction of the vehicle.

  When the storage type information is received by the DSRC transmission / reception unit 29, the control unit 20 stores the received storage type information in the content information storage unit 251 in association with the reception date and time, and the vehicle is determined by the information providing position information. When the GPS module 26 or the autonomous navigation unit 27 detects that the vehicle has entered from a predetermined direction in the information providing area, the display unit 22 and / or the audio output unit 23 displays the content of the stored information received. Play by. FIG. 4 shows an example of content reproduced by the display unit 22 in the information provision area. As shown in FIG. 4, in the information provision area, for example, the content 222 is displayed in a pop-up on the map screen displayed on the display unit 22. Along with this pop-up display, a voice such as “Today, the ward office will be one-way traffic due to electrical work from 10 am to 4 pm today” may be reproduced. Further, the control unit 20 is connected to a clock circuit such as an RTC (Real Time Clock) (not shown), acquires the date / time information output from the clock circuit at the time of content playback, and stores the information on the playback of the content playback date / time. And stored in the content information storage unit 251. The content reproduction date and time is updated every time content is reproduced.

  The operation input unit 21 has an arrow key for indicating a direction (upper, upper right, right, lower right, lower, lower left, left, upper left), a set key arranged in the center of the arrow key, a numeric key, and the like. Various keys associated with various functions such as navigation use are provided, and operation signals for the operated keys are output to the control unit 20. Further, the operation input unit 21 includes a touch panel provided so as to cover the screen of the display unit 22, and detects and detects coordinates instructed by a coordinate reading principle such as an electromagnetic induction type, a magnetostriction type, and a pressure sensitive type. The coordinates obtained are output to the control unit 20 as position signals. Alternatively, the operation input unit 21 may include a remote controller, a microphone, and the like.

  The display unit 22 is configured by a color liquid crystal display or the like, and displays display information for navigation such as a map screen, an icon, and a guide map on the display screen in accordance with an instruction from the control unit 20.

  The voice output unit 23 includes a voice synthesis unit that generates voice data that can be played back from text data, a D / A converter, an amplifier, a speaker, and the like. The voice output unit 23 converts the voice data into analog data according to instructions from the control unit 20. Convert to signal and output sound.

  The hard disk device 24 has a map DB (Data Base) 241, a guide map DB 242, a guide voice DB 243, a facility information DB 244, and the like, and stores data necessary for route search and route guidance in the navigation device 2. Note that the storage devices such as the map DB (Data Base) 241, the guide map DB 242, the guidance voice DB 243, and the facility information DB 244 are not limited to hard disk devices, and recording media such as CD-ROMs and DVDs and information from these recording media. It is good also as a drive etc. which read out.

  The map DB 241 is a database that stores map information including road information. Road information includes nodes, links, names of roads, types of roads (highways, national roads, prefectural roads, general roads, arterial roads, toll roads, etc.), road widths, IC (interchange) names, and maps Information such as the coordinate information (latitude and longitude), the name of the SA (service area), and coordinate information on the map.

The guide map DB 242 is a database that stores guide map data (for example, image data such as an enlarged intersection map, a direction signboard, and a traveling direction arrow) for displaying a guide image at a point of route guidance.
The guidance voice DB 243 is a database that stores voice data of messages necessary for route guidance.
The facility information DB 244 is a database that stores various types of facility information, facility individual names, and facility icon information (including coordinate information on facility maps and icon image information).

  The reception information storage unit 25 is configured by a semiconductor memory or the like, and stores the storage type information received from the roadside apparatuses 11 to 1n by the DSRC transmission / reception unit 29.

FIG. 5 shows an example of the data format of the storage type information received from the roadside apparatuses 11 to 1n in the present embodiment. As shown in FIG. 5, the storage-type information includes information related to the content in addition to the content actual data for reproducing the content by image or sound. Examples of information related to content include business operator information, information provider information, event occurrence position information, information provision area information, and the like.
The provider information is provider information regarding a service provider that distributes content, and includes, for example, a provider code of a service provider that provides the content, text for displaying the provider name, and the like.
The information provider information is information related to an information provider that provides information to be distributed (that is, content). For example, information provider code, information provider name display text, and information indicating the type of information to be distributed Code, information title display text, information expiration date, etc. are included.
The event occurrence position information is information related to the event occurrence position of the distributed information, and is used when the event occurrence position coordinate information (latitude and longitude) and business hours information indicating business hours (when the event occurrence position is a facility) ), Icon image information which is image information for displaying an icon at the event occurrence position.
The information provision area information includes information provision position information (the center coordinates of the information provision area, the radius from the center coordinates, the traveling direction) and the like indicating the position of the information provision area where the content is to be provided. There may be a plurality of information providing position information.

  The GPS module 26 includes a GPS antenna or the like (not shown). The GPS antenna receives GPS signals transmitted from a plurality of GPS satellites launched into a low earth orbit. The GPS antenna receives GPS signals transmitted from at least three GPS satellites, detects the absolute current position (latitude, longitude) of the vehicle based on the received GPS signals, and outputs the detected position to the control unit 20. .

  The autonomous navigation unit 27 includes an angle sensor, a distance sensor, and the like. The angle sensor detects the angular velocity of the vehicle (the rotation angle in the horizontal direction per unit time) and calculates the amount of change in the moving direction. A distance sensor detects the pulse signal output according to rotation of a wheel, and calculates the moving amount | distance of a vehicle. The autonomous navigation unit 27 calculates a relative position change of the vehicle based on the angular velocity signal and the vehicle speed pulse signal and outputs the change to the control unit 20.

  The VICS module 28 receives road congestion information by receiving a broadcast from an FM multiplex broadcast station or the like via an antenna (not shown), and outputs it to the control unit 20. Alternatively, the VICS module 28 may be configured to receive road congestion information broadcast from a beacon transmitter that uses optical / radio radio waves from devices installed on the road.

  The DSRC transmission / reception unit 29 includes a DSRC antenna 29a, performs bidirectional narrowband wireless communication based on DSRC with the roadside wireless devices 11 to 1n, and various communication information including content information distributed from the roadside wireless devices 11 to 1n. Receive.

  For example, when reaching the communication area of the roadside apparatus 11, the DSRC transmission / reception unit 29 receives a DSRC radio wave radiated from the roadside apparatus 11 and performs communication connection processing based on the DSRC with the roadside apparatus 11. When communication with the roadside apparatus 11 is established and communication information such as content information is received from the roadside apparatus 11, the received communication information is output to the control unit 20. The DSRC transmission / reception unit 29 performs the same processing when reaching the communication area of the roadside apparatuses 12 to 1n.

  The DSRC transmission / reception unit 29 has a memory inside, and information such as the screen resolution of the display unit 22 in the navigation device 2, the geodetic system of map information, and the information storage capacity of the reception information storage unit 25 is stored in this memory. In addition, the DSRC transmission / reception unit 29 notifies the roadside radio apparatuses 11 to 1n of these pieces of information at the start of communication with the roadside radio apparatuses 11 to 1n, so that data corresponding to the navigation apparatus 2 is transmitted to the roadside radio apparatuses 11 to 1n. Can be received from.

Next, the operation of the present embodiment will be described.
FIG. 6 shows a storage type information icon display process executed by the control unit 20.

  First, a route search process is executed according to the operation of the operation input unit 21 (step S1). Next, the route guidance process is started based on the vehicle position output from the GPS module 26 and the like and the guidance route (travel route) that is the search result of the route search process (step S2).

Next, a data confirmation process is performed on the storage type information data stored in the content information storage unit 251 (step S3).
FIG. 7 shows data confirmation processing executed by the control unit 20 in step S3.
First, the storage type information data to be processed is selected from the storage type information data stored in the content information storage unit 251 (step S101). Next, it is determined whether or not the information provision position information is included in the storage type information to be processed. If it is determined that the information provision position information is included (step S102; YES), the information provision position information Is referred to, and it is determined whether or not the travel route overlaps within the information providing area. If it is determined that the travel route does not overlap within the information provision area (step S103; NO), the process proceeds to step S105. If it is determined that the travel route overlaps within the information provision area (step S103; YES), the provision position display flag 1 is set in the storage type information to be processed (step S104), and the process proceeds to step S107.

In step S105, the information provision position information of the storage type information to be processed is referred to, and it is determined whether or not there is a location where the distance between the information provision area and the travel route is within a predetermined distance L0. . If it is determined that there is no place where the distance between the information providing area and the travel route is within the specified distance L0 (step S105; NO), the process proceeds to step S107.
On the other hand, when it is determined that there is a place where the distance between the information provision area and the travel route is within the specified distance L0 (step S105; YES), the provision position display flag 2 is set in the storage type information to be processed (step S107). ), The process proceeds to step S107.

  In step S107, the coordinate information of the event occurrence position of the storage type information to be processed is referred to, and it is determined whether or not a travel route exists within a predetermined distance L1 from the event occurrence position. The specified distance L1 is a distance at which the event occurrence position is very close to or on the travel route (for example, several meters from the route). If it is determined that there is no travel route within the specified distance L1 from the event occurrence position (step S107; NO), the process proceeds to step S109. On the other hand, if it is determined that a travel route exists within the range of the specified distance L1 from the event occurrence position (step S107; YES), the occurrence position display flag 1 is set in the accumulation type information to be processed (step S108), and the process is performed. The process proceeds to step S111.

  In step S109, the coordinate information of the event occurrence position in the storage type information to be processed is referred to, and whether or not a travel route exists within a predetermined distance L2 (L1 <L2) from the event occurrence position is determined. To be judged. If it is determined that there is no travel route within the specified distance L2 from the event occurrence position (step S109; NO), the process proceeds to step S111. On the other hand, if it is determined that a travel route exists within the range of the specified distance L2 from the event occurrence position (step S109; YES), the occurrence position display flag 2 is set in the storage type information to be processed (step S110), and the process is performed. The process proceeds to step S111.

  In step S111, a priority is set for the storage-type information to be processed based on the set flag, and the process proceeds to step S4 in FIG. Specifically, a higher priority is set for the generated position display flag than for the provided position display flag, and a higher priority for flag 1 is set for 2. For example, the priority level 1 is set for the storage type information for which the generation position display flag 1 is set, and the priority level 2 is set for the storage type information for which the generation position display flag 2 is set. The storage type information in which the provision position display flag 1 is not set and priority 3 is set, and the storage type in which the generation position display flag is not set and the provision position display flag 2 is set A priority of 4 is set for the information.

  In step S4 of FIG. 6, it is determined whether or not the data confirmation processing has been completed for all data of the storage type information stored in the content information storage unit 251, and if it is determined that the processing has not ended (step S4). (S4; NO), the process returns to step S3. If it is determined that the data confirmation process has been completed for all the data of the storage type information stored in the content information storage unit 251 (step S4; YES), the process proceeds to step S5.

  In step S5, it is determined whether or not the map screen has been updated on the display unit 22. If it is determined that the map screen has not been updated (step S5; NO), the process proceeds to step S7. To do. If it is determined that the map screen has been updated (step S5; YES), icon drawing processing is executed (step S6).

8 and 9 show icon drawing processing executed by the control unit 20 in step S6 of FIG.
First, storage-type information data to be processed is selected from the storage-type information data stored in the content information storage unit 251 (step S201). Next, it is determined whether or not the occurrence position display flag 1 or 2 is set in the storage type information to be processed. If it is determined that it is set (step S202; YES), the process proceeds to step S204. If it is determined that it is not set (step S202; NO), the process proceeds to step S203.

  In step S203, it is determined whether or not the provision position display flag 1 or 2 is set in the storage type information to be processed. If it is determined that it is set (step S203; YES), the process is step S204. If it is determined that it is not set (step S203; NO), the process proceeds to step S217.

  In step S204, the coordinate information of the event occurrence position of the storage type information to be processed is referred to, and it is determined whether or not the event occurrence position is within the display range of the map screen currently displayed on the display unit 22. . If it is determined that the event occurrence position is not within the display range of the map screen currently displayed on the display unit 22 (step S204; NO), the process proceeds to step S211. When it is determined that the event occurrence position is within the display range of the map screen currently displayed on the display unit 22 (step S204; YES), an icon indicating the position of the information provision area of the storage type information is displayed on the display unit 22. Is displayed on the map screen, and if it is determined that it is displayed (step S205; YES), icon association data is acquired (step S206), and the process proceeds to step S208. If it is determined that an icon indicating the position of the information provision area of the storage type information is not displayed (step S205; NO), icon association data is created (step S207), and the process proceeds to step S208.

  Here, the icon association data is data for associating and displaying an icon indicating an event occurrence position and an icon indicating the position of the information providing area, and defines, for example, the display shape and display color of the icon. It is data. The created icon association data is stored in the RAM in association with the storage type information.

  In step S208, whether or not icon image information is included in the storage type information to be processed is determined. If it is determined that icon image information is included (step S208; YES), the display unit 22 is displayed. An icon is drawn based on the icon image information at a position corresponding to the coordinates of the event occurrence position on the displayed map screen (step S209), and the process proceeds to step S211. If it is determined that the icon image information is not included in the storage-type information to be processed (step S208; NO), the event corresponding to the coordinates of the event occurrence position on the map screen is determined based on the icon association data. An icon indicating the generation position is drawn (step S210), and the process proceeds to step S211.

  In step S211, the information provision position information of the storage type information to be processed is referred to, and it is determined whether or not the position of the information provision area is within the display range of the map screen currently displayed on the display unit 22. . If it is determined that the position of the information provision area is not within the display range of the map screen currently displayed on the display unit 22 (step S211; NO), the process proceeds to step S217. When it is determined that the position of the information provision area in the storage type information to be processed is within the display range of the map screen currently displayed on the display unit 22 (step S211; YES), the process proceeds to step S212.

  In step S212, it is determined whether an icon indicating the event occurrence position of the storage type information is currently being displayed on the map screen of the display unit 22, and if it is determined that it is being displayed (step S212; YES), icon association data is acquired (step S214), and the process proceeds to step S216. If it is determined that the icon indicating the event occurrence position of the storage type information is not currently displayed on the map screen of the display unit 22 (step S212; NO), at least one of the information provision areas of the storage type information is selected. It is determined whether the icon to be displayed is currently being displayed on the map screen of the display unit 22, and if it is determined that it is being displayed (step S213; YES), icon association data is acquired (step S214). The process proceeds to step S216. If it is determined that none of the icons indicating the information provision area of the storage type information is currently being displayed on the map screen of the display unit 22 (step S213; NO), icon association data is created (step S215). The process proceeds to step S216.

  In step S216, based on the icon association data, an icon indicating the information provision area is drawn at a position corresponding to the information provision area on the map screen (for example, a position corresponding to the center coordinates of the information provision area), and the process is performed. The process proceeds to step S217. In addition, when the storage type information to be processed includes a plurality of information providing position information indicating the position of the information providing area, and the center coordinates of the plurality of information providing areas are included in the display range of the map screen, the plural Icon is displayed.

  In step S217, it is determined whether or not the icon drawing process has been completed for all data of the storage type information stored in the content information storage unit 251, and if it is determined that the icon drawing process has not been completed (step S217; NO) ), The process returns to step S201. If it is determined that the icon drawing process has been completed for all the data of the storage type information stored in the content information storage unit 251 (step S217; YES), the process proceeds to step S7 in FIG.

  In step S7 of FIG. 6, it is determined whether or not new storage type information has been received from the roadside apparatus 11 to 1n by the DSRC transmission / reception unit 29, and if it is determined that it has not been received (step S7; NO). The process proceeds to step S12. When it is determined by the DSRC transceiver unit 29 that new storage type information has been received from the roadside apparatuses 11 to 1n (step S7; YES), a data confirmation process is executed for the received storage type information (step S8). . The data confirmation process is the same as the process shown in FIG.

  Next, it is determined whether or not there is a free area capable of storing the newly received storage type information in the content information storage unit 251. If it is determined that there is a free area (step S9; YES), a new reception is performed. The stored information is stored (stored) in the content information storage unit 251 (step S10), and the process proceeds to step S12. If it is determined that there is no free space in which the newly received storage type information can be stored (step S9; NO), a data exchange process is executed (step S11).

FIG. 10 shows data exchange processing executed by the control unit 20 in step S11 of FIG.
In the data replacement process, first, it is determined whether or not storage type information having a lower priority than the storage type information newly received this time exists in the content information storage unit 251. The priority of accumulation type information here is the priority set in step S111 of FIG. If it is determined that there is no storage-type information having a lower priority than the storage-type information received this time (step S301; NO), the newly received storage-type information is discarded (step S302). The process proceeds to step S12 in FIG.

  On the other hand, if it is determined that there is storage-type information with a lower priority than the newly received storage-type information in the content information storage unit 251 (step S301; YES), the expiration date of the corresponding storage-type information is checked (step S301). S303), storage-type information that expires at the shortest is picked up (step S304).

  When one storage type information is picked up in step S304 (step S305; NO), the data of the picked up storage type information is deleted from the content information storage unit 251 (step S311), and the process proceeds to step S312. .

  In step S304, when a plurality of storage type information is picked up (step S305; YES), the content reproduction date and time of the picked up storage type information is checked (step S306), and the storage type information with the oldest content reproduction date and time is picked up. (Step S307).

  If one storage type information is picked up in step S307 (step S308; NO), the picked up storage type information is deleted from the content information storage unit 251 (step S311), and the process proceeds to step S312.

  In step S307, when a plurality of storage type information is picked up (step S308; YES), the reception date and time of the picked up storage type information is checked (step S309), and the storage type information with the oldest reception date and time is picked up. (Step S310). The picked-up storage type information is deleted from the content information storage unit 251 (step S311), and the process proceeds to step S312.

  In step S312, it is determined whether or not the capacity for storing newly received storage type information has been secured in the content information storage unit 251, and if it is determined that the capacity has not been secured (step S312; NO), processing is performed. Returns to step S301. When it is determined that the capacity for storing newly received storage type information has been secured in the content information storage unit 251 (step S312; YES), the newly received storage type information is stored in the content information storage unit 251. (Stored) (step S313), the process proceeds to step S12 in FIG.

  In step S12 of FIG. 6, it is determined whether or not the vehicle has arrived at the destination based on the output from the GPS module 26 or the like. If it is determined that the vehicle has not arrived at the destination (step S12; NO), The process returns to step S5. If it is determined that the destination has been reached (step S12; YES), it is determined whether or not a route re-search instruction has been input by the operation input unit 21, and if it is determined that a route re-search has been instructed (step) (S13; YES), the process returns to step S1. If it is determined by the operation input unit 21 that a route re-search instruction has not been input (step S13; NO), this process ends.

  As described above, according to the navigation device 2, the storage information including the information indicating the event occurrence position received from the roadside wireless devices 11 to 1 n and the information indicating the information providing position is stored in the content information storage unit 251. When storage type information whose event occurrence position is within a predetermined range from the guidance route is stored in the content information storage unit 251, an icon indicating the event occurrence position is displayed on the map screen.

  Therefore, the user can recognize that the event occurrence position of the provided content information exists around the guidance route.

  Further, according to the navigation device 2, the storage information including the information indicating the event occurrence position received from the roadside wireless devices 11 to 1n and the information indicating the information providing position is stored in the content information storage unit 251, and the information providing position is stored. Is stored in the content information storage unit 251, an icon indicating the event occurrence position is displayed on the map screen.

  Therefore, the user can recognize on the map screen the event occurrence position of the content information in which the information providing position exists around the guidance route.

  Further, according to the navigation device 2, when storage type information whose information provision position is within a predetermined range from the guidance route is stored in the content information storage unit 251, an icon indicating the information provision position is displayed on the map screen. indicate.

  Therefore, the user can recognize on the map screen that there is an information providing position for providing the content information around the guidance route.

  Further, according to the navigation device 2, when storage type information whose event occurrence position is within a predetermined range from the guidance route is stored in the content information storage unit 251, an icon indicating the information provision position is displayed on the map screen. indicate.

  Therefore, the user can recognize on the map screen the information provision position of the content information in which the event occurrence position exists around the guidance route.

  Further, according to the navigation device 2, the priority is set based on the distance from the guidance path of the event occurrence position and the information providing position to each received content information, and when content information is newly received, The content information storage unit 251 determines whether there is a free area in which new content information can be stored. If there is no free space, the received content information and the content information storage unit 251 have already stored the content information. The received content information is discarded or any content information stored in the content information storage unit 251 is deleted based on the priority of the content information being stored.

  Therefore, even if the storage capacity of the content information storage unit 251 is insufficient, the storage type information having a high priority set based on the event occurrence position of the storage type information and the distance from the guidance route of the information providing position is left. Can be provided to the user.

  The description in the above embodiment is an example of the navigation device according to the present invention, and the present invention is not limited to this.

  For example, in the above-described embodiment, the storage type information is received by communication based on DSRC. However, the present invention is not limited to this. For example, the configuration may be such that it is received by wireless LAN (Local Area Network), packet communication, or the like. Good.

  In addition, the detailed configuration and detailed operation of the navigation device 2 in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

It is a figure which shows the outline | summary of the DSRC system and navigation apparatus of embodiment which concern on this invention. It is a block diagram which shows the functional structure of the navigation apparatus of FIG. It is a figure for demonstrating the event occurrence position and information provision area of content information. It is a figure which shows an example of the content reproduced | regenerated by a display part within an information provision area. It is a figure which shows an example of the data format of the content information delivered from the server of FIG. It is a flowchart which shows the storage type information icon display process performed by the control part of FIG. It is a flowchart which shows the data confirmation process performed by the control part of FIG. It is a flowchart which shows the icon drawing process performed by the control part of FIG. It is a flowchart which shows the icon drawing process performed by the control part of FIG. It is a flowchart which shows the accumulation type | mold information replacement process performed by the control part of FIG.

Explanation of symbols

100 DSRC systems 11 to 1n Roadside wireless device 2 Navigation device 3 Server 20 Control unit 21 Operation input unit 22 Display unit 23 Audio output unit 24 Hard disk device 241 Map DB
242 Guide map DB
243 Guidance voice DB
244 Facility information DB
25 reception information storage unit 251 content information storage unit 26 GPS module 27 autonomous navigation unit 28 VICS module 29 DSRC transmission / reception unit

Claims (5)

Route search means for searching for a guidance route from the vehicle position to the destination, and a map screen around the vehicle position are displayed on the display means, and the searched guidance route is displayed on the map screen to provide route guidance. In a navigation device comprising route guidance means for performing
Receiving means for receiving content information including information indicating an event occurrence position; content relating to information indicating the event occurrence position; and information indicating an information providing position for providing the content to a user ;
Storage means for storing the received content information;
The information providing position within a predetermined range from the guidance route, and control means for displaying the images information on the map screen,
A navigation device comprising: The navigation device according to claim 1 , wherein the control unit displays the event occurrence position within a predetermined range from the guidance route as image information on the map screen . The control means sets a priority for each received content information, and when the receiving means newly receives content information, there is a free space in the storage means that can store the received content information. Whether or not the received content information is discarded based on the received content information and the priority of the content information already stored in the storage means, The navigation device according to claim 1, wherein content information with a low priority stored in the storage unit is deleted. The navigation device according to claim 3 , wherein the priority is set based on an event occurrence position of the content information and a distance from the guidance route of the information providing position. Route search means for searching for a guidance route from the vehicle position to the destination, and a map screen around the vehicle position are displayed on the display means, and the searched guidance route is displayed on the map screen to provide route guidance. A route guidance means, and a display method in a navigation device comprising:
Receiving content information including information indicating an event occurrence position, content relating to the information indicating the event occurrence position, and information indicating an information providing position for providing the content to a user ;
Storing the received content information in a storage means;
A step of displaying the information providing position within a predetermined range from the guidance route, as the images information on the map screen,
Display method including.

Images