JP2004020517A - Car navigation system - Google Patents

Car navigation system Download PDF

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Publication number
JP2004020517A
JP2004020517A JP2002179776A JP2002179776A JP2004020517A JP 2004020517 A JP2004020517 A JP 2004020517A JP 2002179776 A JP2002179776 A JP 2002179776A JP 2002179776 A JP2002179776 A JP 2002179776A JP 2004020517 A JP2004020517 A JP 2004020517A
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Japan
Prior art keywords
communication
information
route
point
car navigation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002179776A
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Japanese (ja)
Inventor
Masatoshi Anpo
Asako Nagata
安保 正敏
永田 麻子
Original Assignee
Denso Corp
株式会社デンソー
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Filing date
Publication date
Application filed by Denso Corp, 株式会社デンソー filed Critical Denso Corp
Priority to JP2002179776A priority Critical patent/JP2004020517A/en
Publication of JP2004020517A publication Critical patent/JP2004020517A/en
Application status is Pending legal-status Critical

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Abstract

In a car navigation device for acquiring map data and a guide route from an information center by data communication, a car navigation device shortens the time until a route is displayed on its display, and transmits and receives data to and from the information center. To reduce communication costs.
When a departure place and a destination are set and transmitted to an information center, the information center performs a route search and divides the searched guide route into a plurality of communication points by a communication point. The map data to the point, the guide route data, and detailed information on the surroundings along the guide route are transmitted from the base station 2 of the mobile phone or the roadside communication device 3 of the DSRC system. When the vehicle reaches the next communication point, the map data from the communication point to the next communication point, the guide route, and detailed information along the route are transmitted from the base station 2 or the roadside communication device 3 to the car navigation device 1. , The data up to the destination are sequentially transmitted.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a car navigation system that searches for information on a route from a departure place to a destination at an information center and transmits the information to an on-vehicle device. About what you did.
[0002]
[Problems to be solved by the invention]
In recent years, some car navigation devices mounted on vehicles have a function of executing data communication with an information provider, which is an information center. In this car navigation device, communication with an information center is generally performed by a mobile phone such as a mobile phone or a PHS (Personal Handy phone System).
[0003]
The car navigation device displays a guide route from the departure point to the destination, and when the vehicle is to be driven in accordance with the display, the departure point and the destination are set by the car navigation device, and both points are set through an information center via a mobile telephone. The information center searches for a guide route from the departure point to the destination and sends the guide route to the mobile phone, so the car navigation device acquires the route information from the mobile phone and displays it on the display. To do, and so on.
[0004]
However, in this conventional car navigation system, since the information center transmits the data of the entire guide route from the departure point to the destination at once, it takes time to receive the data, and the guide route is displayed on the display. There is a problem that it takes a long time to complete. Further, since data is transmitted and received using a mobile telephone, there is a problem that communication costs increase.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to shorten the time until a route is displayed on a display, and to transmit and receive data to and from an information center. It is an object of the present invention to provide a car navigation system that does not require payment of communication costs or can be performed at a low cost.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 comprises an in-vehicle device provided in a vehicle, an information center, and a fixed communication device capable of communicating with the information center. The in-vehicle device comprises: a position detecting means for detecting a current position; Input means for setting a place and a destination, wireless communication means for communicating with the information center via the fixed communication device, a display, and control means, wherein the information center includes the on-vehicle device. Route searching means for searching for a guide route between the departure point and the destination transmitted from the vehicle, and searching for the fixed communication device capable of communicating with the vehicle-mounted device of the vehicle traveling on the searched guide route and fixing the fixed communication device. A communication point searching means for setting a communication point at which the communication device and the in-vehicle device communicate with each other; and dividing the searched guidance route by the communication point to provide a guidance route for each of the divided sections ahead of each of the fixed communication devices. Communication control means for transmitting to the on-vehicle device, the control means of the on-vehicle device displays, on the display, the guide route transmitted from the fixed communication device and the current position detected by the position detection means. It is characterized by being constituted.
[0007]
According to this configuration, at the departure point, it is only necessary to acquire data from the departure point to the next communication point in the entire guide route to the destination, so that after setting the departure point and the destination, The time until the guide route is displayed on the display can be shortened.
[0008]
The invention according to claim 2 is characterized in that the information center searches for and transmits detailed information around the route of each section when transmitting the guide route of each section. Here, the detailed information is information on various stores, for example, various kinds of information such as merchandise information of a department store in the middle of a route, various information such as time service of various stores, free information of a parking lot, and entertainment at an amusement park. Say information. Such information changes every day, but such information can be obtained in real time by using the present system. Then, if there is enough time before reaching the destination, the information can be used to enjoy a meal or enjoy shopping on the way.
[0009]
In the invention according to claim 3, the detailed information includes traffic information and road information of a route in each of the divided sections, and when the route has an obstacle to traffic, another route is searched and transmitted. I do.
According to this, it is possible to know in real time a location where traffic is congested due to road construction or a traffic accident, and it is possible to travel while avoiding the location.
[0010]
According to a fourth aspect of the present invention, when the vehicle arrives at the destination, detailed information around the destination is transmitted from the information center to the vehicle-mounted device.
According to this configuration, it is convenient when searching for a parking lot, shopping, or eating at a destination. If the destination is a department store, for example, it is possible to know the route from the parking lot to the entrance of the department store, or to know on which floor of the department store the desired article is located.
[0011]
The invention according to claim 5 is characterized in that an information center for searching for a guide route and setting a communication point is different from an information center for searching for detailed information.
According to this configuration, by providing information centers for searching for detailed information in various places, it is possible to obtain more detailed information abundantly for each area.
[0012]
According to the invention of claim 6, since the detailed information around the destination can be transferred to the portable terminal, the detailed information around the destination can be used even after getting off the vehicle. Here, the portable terminal may be a device with a display such as a PDA (Personal Digital Assistance), a portable personal computer, a mobile phone, or the like.
[0013]
In the invention of claim 7, the wireless communication means of the on-vehicle apparatus includes the wireless communication means of the mobile telephone system and the wireless communication means of the short-range communication system, and the fixed communication device includes the base station of the mobile telephone system and the short-range area. The communication system includes a roadside communication device.
According to this configuration, in the narrow-area communication system, a price can be obtained by posting information on a store or the like as detailed information, and the system can be operated based on the price, so that a general user using the car navigation system is free of charge. It can be. In addition, since the mobile telephone system will be used for the area outside the network of the narrow-area communication system, if this system is used, it is possible to pay a free charge or a low fee only for the portion using the mobile telephone system. That will be good.
[0014]
The invention according to claim 8 is characterized in that the information center preferentially selects the roadside communication device of the narrow area communication system as the fixed communication device for communicating with the vehicle-mounted device.
Although communication with the base station of the mobile telephone system is possible at almost all places, communication costs are required. Therefore, if a narrow area communication system is used as much as possible, communication costs can be reduced. However, if you are particular about narrow area communication systems, there are many cases where roadside communication devices of narrow area communication systems are not installed near your home, which is often the place of departure, and you want to set a guidance route on the road However, it is necessary to search for a roadside communication device of the narrow area communication system. Therefore, it is preferable to determine whether or not communication is possible with the roadside communication device of the narrow area communication system at the departure place, and to use the mobile telephone system only when there is no roadside communication device.
[0015]
According to the ninth aspect of the present invention, the information center sets a communication point with the base station of the mobile telephone system on the way when the distance between the communication point with the roadside communication device of the narrow area communication system exceeds a certain distance. It is characterized by the following.
Since the vehicle-mounted device must communicate with the roadside communication device of the short-range communication system while the vehicle is running, the communication time is limited. For this reason, if the distance of the section is long, the amount of information to be transmitted increases, and the transmission may not be completed. Further, if the section (distance) for which the route is searched is long, even if the search is performed by adding the real-time information, the route information that is wasted while the vehicle is traveling along the route will be sent. In order to prevent such a problem from occurring, a long-distance section is divided into a plurality of sections and a mobile telephone system is used.
[0016]
According to the tenth aspect of the present invention, when the in-vehicle device communicates with the fixed communication device at the communication point, the information center searches for the detailed information of the section from the communication point next to the communication point to the next communication point. Features.
An eleventh aspect is characterized in that the information center searches for detailed information of a section from the approaching communication point to the next communication point when the vehicle approaches the communication point to a predetermined distance.
According to a twelfth aspect of the present invention, the information center searches for detailed information of a route in the next section based on position information from the on-vehicle device.
[0017]
If the detailed information search timing is set as in claims 10 to 12, the detailed information of the next section is collected and the data is transmitted to the in-vehicle device without delay until the vehicle reaches the next communication point. Can be sent.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram illustrating the overall configuration of the car navigation system according to the present embodiment. As shown in FIG. 1, a car navigation device 1 as an on-vehicle device performs data communication with a base station 2 of a mobile telephone network or a roadside communication device 3 of a Dedicated Sorting Communication (DSRC) system, and an information center 4. It is configured to acquire map data and guidance route data from.
[0019]
The electric configuration of the car navigation device 1 is shown in FIG. The car navigation device 1 includes a position detector 6 as a position detector, a display 7, an operation input unit 8, an audio output device 9, a communication interface unit 10, and a storage unit 11 with respect to a control circuit 5 as a control unit. And so on.
[0020]
The control circuit 2 is mainly composed of a microcomputer, and includes a CPU, a ROM, a RAM, and a bus (not shown) for connecting these components. Of these, the RAM stores a car navigation program and the like, and the RAM temporarily stores processing data, map data, and the like when the program is executed.
[0021]
The position detector 6 includes a geomagnetic sensor 12 for detecting an absolute azimuth, a gyroscope 13 for detecting a yaw angular velocity (yaw rate), a distance sensor 14 for detecting a traveling distance of the vehicle, and a GPS receiver 15. I have. Since each of the constituent elements has a detection error having a different property, the position detector 6 performs high-accuracy position detection while interpolating the mutual detection error. Then, the control circuit 5 determines the current position of the vehicle based on the detection results of the components 12 to 15 of the position detector 6. Note that the position detector 6 does not need to include all of the above components as long as the current position can be calculated with the required accuracy, and also detects the rotation sensor of the steering wheel and the rotation of each tire. The position detector 6 may be configured by combining wheel sensors and the like.
[0022]
The display 7 includes, for example, a color liquid crystal display for displaying a map or the like, and is installed near the driver's seat of the vehicle. The operation input unit 8 includes a push button switch, a touch panel switch provided on a liquid crystal display of the display unit 7, a remote control sensor for receiving an operation signal from a remote control, and the like. A departure place, a destination, and the like are input from the input unit 8. The input of the departure place and the destination is performed by the latitude and longitude indicating the point, the telephone number, the address, the place name, and the like, but is not limited thereto.
[0023]
Here, the control circuit 5 also functions as a display control unit and a guide unit, and displays a map on the display unit 7 based on the map data and the guide data acquired from the information center 4 and detects the map from the position detector 6. The current position of the vehicle determined based on the result is displayed on the map of the display 7. When data transmitted from the information center 4 includes guide route data, the control circuit 5 displays the guide route on the map displayed on the display 7 and changes the current position of the vehicle. When approaching a power intersection, the display screen of the display 7 displays the name of the intersection and the distance to the intersection. Then, the control circuit 5 reads the voice information included in the guide route data, converts the voice information into an analog signal, and drives the speaker of the voice output device 9. As a result, the route guidance such as "about the ** m ahead intersection in the * direction" is given by voice from the speaker, and the route guidance is performed.
[0024]
The communication interface unit 10 is connected to a mobile telephone 16 and a DSRC communicator 17 as wireless communicators. The mobile telephone 16 and the DSRC communicator 17 are connected to the base station 2 of the mobile telephone network and the roadside communicator 3 of the DSRC system, and are further connected to an information center 4 via a communication network 18 comprising a mobile telephone network, a fixed telephone network or the Internet. Connected to. The roadside communication devices 3 of the DSRC system are installed at entrances of expressways, along expressways and main roads, at convenience stores, gas stations, and the like. Each roadside communication device 17 is assigned an ID number. .
[0025]
As shown in FIG. 1, the information center 4 includes a map database 19 storing map data, a guide route information database 20, a POI (Point Of Interest) information database 21, a communication point database 22, and a destination information database 23. , A web server 24, a communication control unit 25 as a communication control unit, a guide route search unit 26 as a route search unit, a communication point search unit 27 as a communication point search unit, and a detailed information search unit 28 as a detailed information search unit. Have.
[0026]
The map data storage unit 19 stores map data including road shape data, and further stores various map-related data such as related facility data and name data in association with the road shape data.
[0027]
The guide route information database 20 includes, as route setting data, node data indicating inflection points on a road such as an intersection or a branch point of a road, inflection points adjacent to each inflection point, and a type of a road therebetween. Link data indicating a connection state such as a length is stored.
[0028]
The POI information database 21 stores data such as facilities and buildings that serve as landmarks at each intersection of the road, and the communication point database 22 stores data indicating the installation location of each roadside communication device 3 of the DSRC system. Have been. The destination information database 23 stores information on buildings, facilities, points, and the like, which are likely to be destinations, and information on department stores, stores, sightseeing spots, parking lots, and the like present in the vicinity thereof.
[0029]
The Web server 24 is for distributing HTML files of various information to the car navigation device 1 using the HTTP protocol. The communication control unit 25 includes, between the car navigation device 1 and the information center 4, detailed information Web servers 30 such as traffic information Web servers 29, department stores, amusement parks, facilities, and the like connected to the communication network 18. The communication with the center 4 is controlled.
[0030]
The guide route search unit 26 searches for a guide route from the departure place to the destination based on the node information and the link information stored in the guide route information database 20. When the guide route is searched, the communication point searching unit 27 searches for the roadside communication device 3 along the route. The detailed information search unit 28 obtains traffic information on the guide route from the traffic information Web servers 29 in various places connected to the communication network 18, and provides service information such as department stores and restaurants around the guide route and sightseeing spots. And the like from the detailed information Web server 30 connected to the communication network 18.
[0031]
Next, the operation of the above configuration in which a guide route to a destination is acquired and the vehicle travels to the destination will be described with reference to the flowcharts of FIGS. In order to acquire the guide route information, first, in the car navigation device 1, the operation input unit 8 is operated to set the departure place (mostly the current location) and the destination, for example, by latitude and longitude. The local data is transmitted to the information center 4 from the mobile telephone 16 or the DSRC wireless communication device.
[0032]
Then, first, the route search unit 26 of the information center 4 searches for a guide route from the departure place to the destination (step S1). When the guide route is searched, the communication point searching unit 27 searches for the DSRC roadside communication device 3 existing along the guide route (step S2), and then determines whether there is no roadside communication device 3 along the guide route. Is determined (step S3).
[0033]
(1) When there is no roadside communication device along the guidance route
If “YES” is determined in step S3, that is, if there is no roadside wireless device 3 along the guide route, the communication point searching unit 27 of the information center 4 divides the guide route into a plurality of, for example, a predetermined distance. , The departure point, the destination, and each division point are determined as communication points at which the car navigation device 1 communicates with the information center 4 (step S4).
[0034]
Next, for the route from the departure point, which is the first communication point, to the next second communication point in the guide route, the detailed information search unit 28 of the information center 4 compares the traffic information of the route with the traffic information Web server. From the departure point initially searched by the route search unit 26 based on the traffic information and the next communication point, if there is a place that is impassable due to construction or accident, The route search unit 26 newly searches for a route from the departure place to the next communication point so as to avoid the traffic-impossible point (step S5). In this case, a new guidance route from the departure point to the destination is searched again to determine a communication point so as to avoid the traffic-impossible point, and then a new route from the departure point to the next communication point is determined. A routine for confirming that there is no obstacle may be used.
[0035]
Then, the detailed information search unit 28 retrieves information (POI information) such as a building that is a mark of an intersection that turns right and left, in particular, about the route from the finally determined departure point to the next communication point, in the POI information database 21. And information on various shops and sightseeing spots around the guide route, for example, XX department stores hold spring bargain sales throughout April, XX Western confectionery stores open today at 10 o'clock Information such as presenting a gift to 100 people, and performing a xx fair at the XX amusement park is acquired from the various detailed information Web servers 10 (above, step S5).
[0036]
Thereafter, the communication control unit 25 obtains the map data from the departure place to the next communication point from the map database 19 and transmits the car data from the mobile telephone base station 2 via the communication network 18 together with the route information, the POI information and the detailed information. The data is transmitted to the mobile telephone 16 of the navigation device 1 (step S6).
[0037]
In the car navigation device 1, the information received by the mobile telephone 16 is stored in the storage unit 11, and a map from the starting point to the next communication point, the current position, the guide route, and various detailed information are displayed on the display unit 7. . The detailed information may be output from the audio output device 9. Then, the driver of the vehicle knows the intersection to be turned right or left by the sound output from the sound output device 9 or the characteristic building displayed on the display 7 and travels along the easily determined guide route. Can be.
[0038]
When the control circuit 5 of the car navigation device 1 detects that the vehicle has traveled a certain distance, for example, based on a detection signal of the distance sensor 14, the control circuit 5 transmits a traveling signal from the mobile telephone 16 to the base station 2 each time. Has become. When the information center 4 detects that the vehicle has reached the point within a predetermined distance (TKm) before the next communication point from the departure point based on the traveling signal (step S7), the next communication point is used as the destination. After confirming that the vehicle is not on the ground ("NO" in step S8), traffic information is collected from the second communication point to the third communication point in the guide route, and the same as in step S5 described above. The route between them is finally determined, and map data, route information, POI information, and detailed information on the determined route are obtained (step S9).
[0039]
When the information center 4 detects that the vehicle has reached the second communication point based on the distance information transmitted from the mobile telephone 16 (“YES” in step S10), the mobile telephone of the car navigation device 1 16 and transmits map data, route data, and detailed information from the second communication point to the third communication point (step S11). Thus, the map, route, and detailed information from the second communication point to the third communication point are displayed on the display 7 of the car navigation device 1.
[0040]
Thereafter, the information center 4 repeatedly executes the above operation until the next communication point of the vehicle becomes the destination. As a result, each time the car navigation device 1 reaches a communication point, the car navigation device 1 receives a map, a route, and detailed information from the communication point to the next communication point.
[0041]
When the next communication point becomes the destination ("YES" in step S8), the information center 4 outputs the destination information, that is, if the destination is, for example, a department store, map data around the department store, a building serving as a landmark, or the like. The destination information such as the POI information, the location of the parking lot and the degree of congestion thereof, the shops existing around the destination of the department store, and guidance on each floor of the department store is acquired (step S12). When the vehicle arrives at the destination ("YES" in step S13), the information center 4 transmits the obtained information to the mobile telephone 16 (step S14), and the navigation from the departure point to the destination is performed. End the operation.
[0042]
(2) When there is a roadside communication device along the guidance route
If “NO” is determined in step S3, that is, if there is the roadside communication device 3 along the guide route, the communication point searching unit 27 next determines that the section where the distance between the two roadside communication devices 3 is long is long. It is determined whether or not there is a route, and if there is no long distance between the roadside communication devices 3 ("NO" in step S15), the starting point, the destination, and the location of the roadside communication device 3 are determined as communication points (step S17). If there is a section with a long distance between the two roadside communication devices 3 ("YES" in step S15), the section is divided into a plurality of sections according to the distance (step S16), and the departure place, destination, and roadside The location where the communication device 3 is located and the division point between the long roadside communication devices 3 are determined as communication points at which the car navigation device 1 and the information center 4 communicate (step S17).
[0043]
When the communication points are determined as described above, the detailed information search unit 28 of the information center 4 determines, for the route from the departure point, which is the first communication point, of the guide route to the next second communication point. The route traffic information is obtained from the traffic information Web server 29 from the traffic information Web server 29, and the route search unit 26 sets the route from the departure point to the next communication point in the same manner as described above, or the point where the obstacle has occurred. Modify to a new route so that it does not pass. Then, the detailed information search unit 28 obtains the POI information from the POI information database 21 for the route from the finally determined departure point to the next communication point, and details the information of various stores existing around the POI information. It is acquired from the information Web server 10 (step S17).
[0044]
Thereafter, the communication point searching unit 27 searches whether or not there is a DSRC roadside communication device 3 that can communicate at the departure place, and if there is one (“YES” in step S18), the communication control unit 25 proceeds from the departure place to the next. Is acquired from the map database 19 and transmitted along with the route information, the POI information, and the detailed information from the DSRC roadside communication device 3 to the DSRC communication device 17 of the car navigation device 1 via the communication network 18 ( Step S19). If there is no roadside communication device 3 that can communicate at the departure place ("NO" in step S18), the communication control unit 25 sets the map data, the route information, and the POI information on the route from the departure place to the next communication point. Then, the detailed information is transmitted from the roadside communication device 3 to the mobile telephone 16 of the car navigation device 1 (step S20).
[0045]
In the car navigation device 1, the information received by the mobile telephone 16 or the DSRC communicator 17 is stored in the storage unit 11, and the display 7 displays a map from the starting point to the next communication point, a guide route, a current position, various types of information. Display detailed information for.
[0046]
When the vehicle starts running, the car navigation device 1 transmits a running signal to the information center 4 every time the mobile phone 17 runs a predetermined distance. When the information center 4 detects that the vehicle has traveled within a predetermined distance (TKm) before the next communication point from the departure point based on the traveling signal transmitted from the mobile telephone 16 of the vehicle ("YES" in step S21). After confirming that the next communication point is not the destination ("NO" in step S22), traffic information is collected from the second communication point to the third communication point in the initial guide route. The route between them is finally determined, and map data, POI information, and detailed information on the determined route are obtained (step S23).
[0047]
Then, the information center 4 determines whether or not the DSRC roadside communication device 3 exists at the next communication point, and if there is the roadside communication device 3 ("YES" in step S25), the information center 4 is at the next communication point. When the roadside communication device 3 detects the arrival of the vehicle (by natural connection with the DSRC communication device 17 of the car navigation device 1) (“YES” in step S26), the second communication point is transmitted from the roadside communication device 3 to the second communication point. The map data, route information, POI information, and detailed information with the third communication point are transmitted to the DSRC communicator 16 of the car navigation device 1 ("NO" in step S27, step S19).
[0048]
If the roadside communication device 3 is not present at the second communication point (“NO” in step S25), the information center 4 determines that the vehicle has reached the second communication point based on the distance information from the mobile telephone 17. If detected ("YES" in step S29), the mobile phone 16 of the car navigation device 1 is called from the base station 2 of the mobile phone, and the map data, route data, and detailed information from the second communication point to the third communication point are called. Is transmitted ("NO" in step S29, step S20). As described above, the map, route, and detailed information from the second communication point to the third communication point are displayed on the display 7 of the car navigation device 1.
[0049]
Thereafter, the information center 4 repeatedly executes the above operation until the next communication point of the vehicle becomes the destination. Then, when the next communication point becomes the destination ("YES" in step S22), the information center 4 acquires the above-mentioned destination information from the detailed information Web server 30 (step S27). Next, when the vehicle arrives at the destination (“YES” in step S27 or “YES” in step S30), the information center 4 transmits the destination information to the mobile telephone 16 or the DSRC communicator 17 (step S31). Alternatively, in step S32), the navigation operation ends.
[0050]
As described above, according to the present embodiment, at the departure point, only information about the short route from the departure point to the next communication point is transmitted and received, and information from the departure point to the destination is transmitted and received collectively. The time required for transmission / reception can be greatly reduced as compared with the case where the vehicle is started, from when the departure point and the destination are set to when the guidance route is displayed on the display 4 and the vehicle can be started. Time can be reduced.
[0051]
Further, since the map data, the route information, and the detailed information are transmitted by the communication between the roadside communication device 3 of the DSRC system and the DSRC communication device 17 of the car navigation device 1, the communication cost is reduced. If the DSRC system provides maps and guidance routes, it will also distribute advertising information on stores and tourist spots at the same time. Can be used. For this reason, there is no need to charge the user of the car navigation device 1, and the communication cost of the mobile phone 16 used at a location where there is no roadside communication device 3 or transmission of distance information is reduced. Can be done.
[0052]
Also, detailed information such as traffic information, stores, sightseeing spots, and parking lots is collected while the vehicle is running, so that the latest information can be provided. In addition, when you arrive at the destination, you can get a map of the destination area and detailed information about the surrounding area, so the route from the parking lot to the entrance of the department store and the goods you want are located on what floor of the department store, You can get the information you really want after you arrive at the destination.
[0053]
FIG. 5 shows another embodiment of the present invention. The difference from the first embodiment is that two types of centers, a main information center 31 and a district information center 32, are provided.
[0054]
The main information center 31 performs the same function as the information center 4 in the first embodiment. The district information centers 32 are installed in each district, and hold more detailed traffic information around the installation place, POI information, and destination detailed information than the information held by the main information center 31.
[0055]
In this configuration, the main information center 31 searches for a guide route from the departure place to the destination, divides the guide route into a plurality of sections for each communication point, and holds detailed information of the divided sections. A search is performed to determine whether or not there is a local information center 32, and if so, the local information center 32 is made to confirm traffic obstacles on the route and collect POI information and detailed information. Then, the district information center 32 transmits the map information, the route information, the POI information, and the detailed information directly from the district information center 32 or through the main information center 31 to the mobile telephone 16 or the DSRC communication device 17 of the car navigation apparatus 1. Send to
[0056]
The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications or extensions are possible.
The detection that the vehicle has reached TKm before the communication point is performed by transmitting the position information detected by the GPS receiver 15 to the information center 4, and the information center 4 detecting the current position of the vehicle from the position information. It is good also as composition.
When the vehicle arrives within TKm before the communication point, the communication point is not limited to the configuration in which the operation of acquiring information of the next section starting from the communication point is started, and the vehicle reaches the communication point and communicates with the information center 4. Accordingly, it may be configured that, assuming that the vehicle has entered a section where the communication point is the starting point, information on the section starting from the communication point next to the communication point is obtained.
Map data, guide route data, POI information, detailed information, and the like may be transmitted using only a mobile phone.
The map data may be held by the car navigation device 1.
As means for performing data communication between the car navigation device 1 and the information center 4, a LAN is formed by the information center and the roadside communication device, and a LAN communication device that communicates with the word communication device of the LAN is provided on the vehicle side. May be mounted.
The in-vehicle device is not limited to a car navigation device.
The car navigation device 1 may be provided with an output unit for transferring information obtained from the information centers 4, 31, 32 to a portable device, for example, a PDA, a portable personal computer, a mobile phone such as a mobile phone or a PHS. In this way, the detailed information acquired from the information center 1 can be used even after the vehicle has been dismounted after arriving at the destination.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, and is a block diagram showing an entire system.
FIG. 2 is a block diagram of a car navigation device.
FIG. 3 is a flowchart showing control contents (1);
FIG. 4
FIG. 5 is a view corresponding to FIG. 1, showing another embodiment of the present invention.
[Explanation of symbols]
In the figure, 1 is a car navigation device (vehicle device), 2 is a base station (fixed communication device), 3 is a DSRC roadside communication device (fixed communication device), 4 is an information center, 5 is a control circuit (control means), 6 is a position detector (position detection means), 7 is a display, 8 is an operation input unit (input means), 25 is a communication control unit (communication control means), 26 is a guidance route search unit (route search means), 27 Is a communication point searching unit (communication point searching means), 31 is a main information center, and 32 is a district information center.

Claims (12)

  1. An in-vehicle device provided in the vehicle,
    Information center,
    It consists of a fixed communication device that can communicate with this information center,
    The on-vehicle device includes: a position detecting unit that detects a current position; an input unit for setting a departure place and a destination; a wireless communication unit that communicates with the information center via the fixed communication device; And control means,
    The information center includes a route search unit that searches for a guide route between the departure point and the destination transmitted from the in-vehicle device, and the fixed device that can communicate with the in-vehicle device of the vehicle that travels on the searched guide route. A communication point searching means for searching for a communication device and setting a communication point at which the fixed communication device and the in-vehicle device communicate with each other; and dividing the searched guidance route by the communication point to provide a guidance route for each of the divided sections. Communication control means for transmitting from the fixed communication device to the vehicle-mounted device,
    A car navigation system, wherein the control means of the on-vehicle device is configured to display, on the display, a guide route transmitted from the fixed communication device and a current position detected by the position detection means. system.
  2. 2. The car navigation system according to claim 1, wherein the information center searches for and transmits detailed information around the route of each section when transmitting the guide route of each section.
  3. The method according to claim 2, wherein the detailed information includes traffic information and road information of a route in each of the divided sections, and when the route has a hindrance, another route is searched and transmitted. Car navigation system.
  4. 4. The car navigation system according to claim 1, wherein when the vehicle arrives at the destination, detailed information around the destination is transmitted from the information center to the on-vehicle device.
  5. 5. The car navigation system according to claim 4, further comprising output means for transferring detailed information around the destination to the portable terminal.
  6. The car navigation system according to any one of claims 2 to 5, wherein an information center for searching for the guide route and setting a communication point is different from an information center for searching for the detailed information.
  7. The wireless communication means of the in-vehicle device includes a wireless communication means of a mobile telephone system and a wireless communication means of a short-range communication system, and the fixed communication device includes a base station of a mobile telephone system and a roadside communication of a short-range communication system. The car navigation system according to any one of claims 1 to 6, further comprising a navigation device.
  8. The car navigation system according to any one of claims 1 to 7, wherein the information center preferentially selects a roadside communication device of the narrow area communication system as a fixed communication device communicating with the on-vehicle device. .
  9. The information center, when the distance between the communication point with the roadside communication device of the narrow area communication system exceeds a certain distance, to set a communication point with the base station of the mobile telephone system in the middle thereof. 9. The car navigation system according to claim 8, wherein
  10. The information center, when the in-vehicle device communicates with the fixed communication device at the communication point, searches for detailed information of a section from a communication point next to the communication point to the next communication point. The car navigation system according to claim 2.
  11. 10. The information center searches for detailed information of a section from the approaching communication point to the next communication point when the vehicle approaches a communication point to a predetermined distance. The car navigation system according to any of the above.
  12. 10. The car navigation system according to claim 1, wherein the information center searches for detailed information of a route in a next section based on position information from the on-vehicle device.
JP2002179776A 2002-06-20 2002-06-20 Car navigation system Pending JP2004020517A (en)

Priority Applications (1)

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JP2002179776A JP2004020517A (en) 2002-06-20 2002-06-20 Car navigation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002179776A JP2004020517A (en) 2002-06-20 2002-06-20 Car navigation system

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Publication Number Publication Date
JP2004020517A true JP2004020517A (en) 2004-01-22

Family

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007255895A (en) * 2006-03-20 2007-10-04 Clarion Co Ltd Navigation system and apparatus, server system, its control method and program
JP2009174952A (en) * 2008-01-23 2009-08-06 Aisin Aw Co Ltd Route guidance apparatus
JP2009175610A (en) * 2008-01-28 2009-08-06 Kenwood Corp In-vehicle device
US7818119B2 (en) 2009-02-24 2010-10-19 Kabushiki Kaisha Toshiba Electronic apparatus and navigation image display method
WO2019150466A1 (en) * 2018-01-31 2019-08-08 三菱電機株式会社 Guidance information delivery device, user guidance system, and information providing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007255895A (en) * 2006-03-20 2007-10-04 Clarion Co Ltd Navigation system and apparatus, server system, its control method and program
JP2009174952A (en) * 2008-01-23 2009-08-06 Aisin Aw Co Ltd Route guidance apparatus
JP2009175610A (en) * 2008-01-28 2009-08-06 Kenwood Corp In-vehicle device
US7818119B2 (en) 2009-02-24 2010-10-19 Kabushiki Kaisha Toshiba Electronic apparatus and navigation image display method
WO2019150466A1 (en) * 2018-01-31 2019-08-08 三菱電機株式会社 Guidance information delivery device, user guidance system, and information providing device

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