JP2003042785A - Method for acquiring inverted path in communication type navigation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inverted path without searching for a path again simply by giving the instruction of an inverted path from a terminal side when returning to a path that is obtained as a result of search. SOLUTION: In a communication type navigation system for transmitting road map information from a base station to a plurality of pieces of mobile terminal apparatus, the base station creates the inverted path with a departure point and a destination that have been transmitted from the terminal apparatus as the destination and departure point, respectively, in the last path search request when a path inversion instruction is transmitted from the pieces of terminal apparatus to the base station, thus transmitting road map information including the inverted path to the pieces of terminal apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to communication type navigation for receiving map information and route search results from a base station, and more particularly to a method for searching and acquiring a reverse route.

[0002]

2. Description of the Related Art A communication-type navigation system in which a base station and a plurality of terminal devices are communicably connected to each other and the terminal devices receive and display map information and the like sent from the base station is disclosed in, for example, Japanese Patent Laid-Open No. 8- 22246 and Japanese Patent Laid-Open No. 11-22
It is disclosed in Japanese Patent No. 4047. In the system disclosed in the above publication, the base station transmits predetermined map information and the like to the terminal device, the terminal device displays the received map information and the like, and the user uses this. Further, the base station provides the terminal device with a plurality of types of map information and the like by adding index information, and the terminal device specifies the area and scale of the map information by the index information and stores the transmitted map information and the like. is doing.

In communication-type navigation that receives map information and route search results from a base station, when returning to the same route after reaching a destination according to the searched route, a route obtained by reversing the outward route is often used as a return route. However, in such a case, it was necessary to communicate with the base station again to search for a new route. Therefore, as a return route, a new route is searched in order to search for a route that is the reverse of the previously searched forward route, data processing is performed in the same way as when the forward route is searched, and for that reason, the amount of data to be communicated is required.

[0004]

As described above, according to the present invention, when the route obtained as a result of the search is returned, only by giving a route reversal instruction from the terminal side, the reversal route can be changed without performing the route search again. To get it. Further, when obtaining the inversion route, the amount of data transmitted from the base station side to the terminal side is reduced as much as possible.

[0005]

According to the present invention, in a communication type navigation system for transmitting road map information from a base station to a plurality of movable terminal devices, a route reversal instruction is issued from the terminal device to the base station. Upon transmission, the base station creates a reversal route with the departure point transmitted from the terminal device at the time of the previous route search request as the destination and the destination as the departure point, and transmits road map information including the reversal route to the terminal device. To do.

Further, the terminal device also transmits the identification information of the terminal device when requesting the route search to the base station, and when the base station receives the reversal instruction from the terminal device, based on the identification information. The starting point and destination at the time of the previous route search request of the terminal device are identified. The identification information is any one of a terminal ID, a mobile phone number, and an Internet IP address. The origin and destination are represented by coordinates, and the coordinates and identification information are stored in the storage unit of the base station.

Further, when transmitting the road map information including the inversion route to the terminal device, the base station transmits the road map information excluding the information already transmitted to the terminal device regarding the inversion route.

Further, the reverse route includes an enlarged intersection image, and the enlarged intersection image is displayed such that the traveling direction of the reverse route is at the top. If the reverse route includes a one-way road, a warning is issued from the output unit of the terminal device and / or the one-way road is deleted. Alternatively, the base station searches for a detour in this portion and transmits it to the terminal device.

Further, according to the present invention, when the terminal device transmits the route reversal instruction to the base station, the terminal device stores the information on the departure point and the destination information stored in the storage unit of the terminal device at the time of the route search request. It is also possible to transmit the information of the destination and the departure place to the base station, and the base station that receives the instruction can create the inversion route based on the transmitted the departure place and the destination.

Further, according to the present invention, when the route reversal instruction is given in the terminal device, the information of the departure place and the destination at the time of the previous route search request is read from the storage unit of the terminal device, and the departure place is set as the destination. It is also possible to convert the place into a departure place and create a reversal route on the basis of the converted destination and departure place in the terminal device.

[0011]

1 is a diagram showing a configuration of a system to which a communication navigation reversing method according to an embodiment of the present invention is applied. This system has a base station 1 and one or a plurality of terminal devices 2 mounted on a moving body such as a vehicle. Then, the base station 1 provides map information and other information to the terminal device 2 movable in the service area by bidirectional communication.

The base station 1 is a map database (hereinafter,
"Map DB") 11, map management unit 12, image creation unit 13a, route calculation unit 13b, guidance information creation unit 13
c, CP + U navigation guidance management unit 1
4, a terminal management unit 15, and a transmission / reception unit 16. Then, the transmission / reception unit 16 performs bidirectional communication with the terminal device 2 via a public line, an Internet line, or wireless communication.

The map DB 11 of the base station 1 is a database of map image data, character data, image data, intersection enlarged views, voice guidance data, etc., and is managed by the map management unit 12. Based on the current position of the vehicle transmitted from the terminal device 2 in addition to the above data, the map DB 11
The road network data used for route search, and a combination of these additional data are stored. Then, in the image creating unit 13a, an image to be transmitted to the terminal device 2 based on the traveling position of the vehicle equipped with the terminal device 2 or based on an area designated by the user is displayed in the map DB
It is created by taking out from 11, and is transmitted sequentially or collectively. Here, the area based on the position of the terminal and the area specified by the user are assumed to be the area specified by the terminal device. When a route search command is received from the terminal device 2, the route calculation unit 13b searches for a route and sets a guide route. Then, based on the guide route, the image creating unit 13a causes the terminal device 2 to
The images to be transmitted to are retrieved from the map DB 11 and transmitted sequentially or collectively. The route data indicating the guide route is data represented by coordinate points, for example.

The guide information creation unit 13c calculates the time to reach a specific place on the way such as a destination or an intersection, or recognizes a place near the intersection, and displays an enlarged view of the intersection described later. Set the timing of utterance of or voice guidance.

In the communication type navigation, road map information is transmitted from the base station 1 to the terminal device 2. In the present invention, "road map information" means map image data, character data, image data, guide route, intersection enlargement. Figure, detour,
It shall include some or all of traffic information and other information necessary for route guidance.

These road map information is sent through the navigation guidance management unit 14 and the terminal management unit 15 and then to the transmission / reception unit 16
Is transmitted to the terminal device 2. Transmission / reception between the base station 1 and the terminal device 2 is performed via a public line, an internet line, or wireless communication.

On the other hand, the terminal device 2 has a storage unit 21, a reception information management unit 22, an image management unit 23a, and a route management unit 23.
b, a guidance information management unit 23c, a navigation function management unit 24 including a CPU, a vehicle information input unit 25, an input unit 26, an output unit 27, a reversal calculation unit 28, and a transmission / reception unit 29. Then, the transmission / reception unit 29 causes a public line,
It transmits / receives to / from the base station 1 via an internet line or wireless communication. The mobile phone 3 can be used as the transmitting / receiving unit 29, and the mobile phone can transmit / receive data to / from the base station 1 via a public line or an Internet line. In addition, it is possible to perform bidirectional communication with the base station 1 by wireless communication via road-to-vehicle communication (DSRC) or a beacon.

The transmission / reception unit 29 of the terminal device 2 receives the road map information transmitted from the base station 1, and is stored in the storage unit 21 via the navigation function management unit 24. Data is stored and managed. The image management unit 23a sequentially extracts the map image data, the character data, and the like stored in the storage unit 21 as needed. Further, the route management unit 23b manages the current position of the vehicle, whether or not the vehicle is on a guide route, and the like. The guidance information management unit 23c sequentially displays enlarged views of intersections or manages the timing of uttering voice guidance.

Further, vehicle information such as vehicle position, speed, acceleration, etc. acquired from GPS or the like is input to the navigation function management section 24 from the vehicle information input section 25. In addition, the starting point and the destination of the vehicle are input from the input unit 26. Further, the reversing instruction according to the present invention and other predetermined requests from the user are also input. Then, the navigation function management unit 24 outputs the map image, the position of the vehicle, the character data, the data such as the guide route, and the like, which is displayed on the output unit 27. The reversal calculator 28 is used when the reversal path is created on the terminal side, and here, the reversal path is calculated and searched.

FIG. 2 is a diagram showing another configuration of a system to which the map information distribution method according to the embodiment of the present invention is applied. This system also has a base station 1 and a terminal device 2 mounted on a moving body such as a vehicle, and the configurations of the base station 1 and the terminal device 2 are similar to those of the system shown in FIG. This embodiment differs from the embodiment of FIG. 1 in that the base station 1 provides the terminal device 2 with map information and the like in a broadcast format. For example, as shown in FIG. 2, the transmitter 16 of the base station 1
a is transmitted to a broadcasting station such as FM radio or a broadcasting satellite 5, and the terminal device 2 receives this at a receiving unit 29b via an antenna 4.

On the other hand, when transmitting from the terminal device 2 to the base station 1, the transmitting unit 29a transmits the signal via the public line, the Internet line, or the wireless communication as in FIG. Further, the mobile phone 3 can be used as the transmitting unit 29a, and the mobile phone can transmit to the base station 1 via a public line or an Internet line.

According to the present invention, the inversion path can be obtained as follows by the system configuration shown in FIG. 1 or 2. The following description will be made with reference to FIG.

First, the starting point and the destination are input to the input unit 26 of the terminal 2, and the navigation function management unit 24 transmits them to the base station 1 via the transmission / reception unit 29 to request a route search.
When the base station 1 receives this by the transmission / reception unit 16, the route calculation unit 13b searches for a route and sets a guide route. Then, based on the guide route, the image creating unit 13a extracts the road map image data to be transmitted to the terminal device 2 from the map DB 11 and transmits it.

In the terminal device 2, the map image data and the guide route data transmitted from the base station 1 are received by the transmission / reception unit 29 and displayed by the output unit 27.

The data indicating the starting point, the destination and the guide route can be represented by coordinate points.

FIG. 3 is a diagram showing a map image including a guide route. In FIG. 3 (a), A is a departure place and B is
Is the destination. The thick line between A and B is the searched guide route, which is from the starting point A to the destination B. An intersection C is included on the map screen as a part of the route, and when the intersection C approaches the route guidance, an enlarged view of the intersection C as depicted on the right side of the map screen is displayed on the entire screen or on the screen. It is displayed in a part (for example, a lower right portion, an upper left portion, or the like that does not overlap the guide route). At this intersection, the guide route is a left turn.

According to the present invention, when the user returns from the place of departure to the destination along the above guide route and then returns to the same route, an inversion instruction is input from the input unit 26 of the terminal device 2, and the transmitting / receiving unit 29
To the base station 1 via. The base station 1 stores the data of the starting point and the destination of this route, and when a reversing instruction is transmitted from the terminal device 2, the reversing route in which the destination is the starting point and the starting point is the destination. Is created based on the route that has already been searched and used for guidance, and is transmitted to the terminal device 2. In this case, there is no need to search the route again. On the terminal device 2 side, the reversal route transmitted from the base station 1 is displayed on the output unit 27.

FIG. 3B is a diagram showing an inversion path.
In the figure, the destination B is the starting point and the starting point A is the destination. The thick line between B and A is the reverse guide route, which goes from the destination B on the outward route to the departure point A. On the map screen, the intersection C is included as a part of the route like the outward route, and when the intersection C approaches in the return route guidance,
An enlarged view of the intersection C as drawn on the right side of the map screen is displayed on the entire screen or a part of the screen. In the case of this intersection, the guide route on the outward route turned left, but on the reverse route on the return route, it turned right as shown in the figure.
Further, the position of the convenience store is located on the upper right of the traveling direction on the outward route, but is located on the upper left of the reversing route.

FIG. 4 is a diagram showing an example of how the reverse route is displayed on the map screen when the outward route includes a one-way route. As shown in FIG. 4A, when there is a one-way road from the starting point A to the destination B on the outward path, the one-way path cannot be passed on the reversing path. According to the present invention, in such a case, a bypass route connecting both ends of the guide route that is divided for one-way traffic is searched for and displayed on the reverse route as shown in FIG. 4 (a). Alternatively, a warning can be issued to prevent the vehicle from running backward on a one-way road.

In the above embodiment, the base station 1 created the reverse route and transmitted it to the terminal device 2. However, the terminal device 2 can also create the reverse route. The terminal device 2 of FIG. 1 and FIG. 2 is provided with an inversion calculation unit 28, and the input unit 26
When the inversion instruction is input from, the navigation function management unit 24 sets the previous destination stored in the storage unit as the departure place, converts the previous departure place into the destination, and based on this, the inversion calculation unit 28 The calculation of the reverse path is instructed, the reverse path is created, and this is displayed on the output unit 27. [Embodiment 1] FIGS. 5 and 6 are flow charts showing an embodiment of the present invention. The control of the operation shown in this flowchart is performed by the navigation guidance management unit 14 of the base station 1 and the navigation guidance management unit 24 of the terminal device 2.

FIG. 5 shows a flow when the route search request is transmitted from the terminal side to the base station side. The base station 1 receives the information of the departure place and the destination from the terminal device 2 and also receives the identification information of the terminal device transmitted from the terminal side (S1). The departure place and the destination are represented by, for example, coordinate data, and this data is transmitted to the base station and stored in the storage unit 21 of the terminal device 2. As the identification information, for example, the terminal ID, the telephone number of the mobile phone when the terminal side transmits the data using the mobile phone, and the IP address of the internet when the data is transmitted via the Internet are used.
The base station side stores the received coordinates of the departure point and the destination and the identification information thereof in the terminal management unit 15 (S2). Thereby, the departure place and the destination can be managed for each terminal device based on the identification information. Next, the base station side searches for a route based on the received starting point and destination, creates route guidance data, and transmits it to the terminal side (S3). As described above, when the terminal side receives the route guidance data, the terminal side displays the route along with the map image on the output unit 27.

FIG. 6 shows a flow when the route reversal request is transmitted from the terminal side to the base station side. When the base station 1 receives the route reversal request from the terminal device 2 together with the identification information such as the ID of the terminal, the mobile phone number, or the IP of the Internet (S1), when searching for the route of the terminal based on the identification information of the terminal side. The starting point and the destination of the terminal management unit 15
Is read from (S2).

Next, an inversion route is created with the departure point at the time of the previous route search as the destination and the destination as the departure point (S).
3). Next, the terminal management unit 15 reads the content of the data already transmitted to the terminal side at the time of the previous route search. Alternatively, the contents of the data already stored in the storage unit 21 of the terminal device transmitted from the terminal side are received (S4). Then, the reversal route and the data excluding the map data already transmitted to the terminal side and the intersection enlarged view etc. are transmitted (S
5). By doing so, the amount of data to be transmitted can be reduced.

On the other hand, on the terminal side, the reverse route data created by the base station side is received, the map data already received and stored in the storage unit 21 is taken out, and the map image on which the reverse route based on the reverse route data is superimposed is superimposed. It is displayed on the output unit 27. In addition, an enlarged view of the intersection and the like is also retrieved from the storage unit 21, and is displayed such that the traveling direction of the reversal route is at the top based on the reversal route data, as shown in FIG. 3B. Furthermore, if there is a one-way street in the reversing route,
A warning can be issued from the output unit 27 of the terminal device 2. Also, this part can be deleted from the guide route. Alternatively, the base station may search for a detour of this portion and transmit it to the terminal device. [Embodiment 2] FIG. 7 is a flow chart showing another embodiment of the method of the present invention. When the user requests the reverse route, the coordinates of the departure point and the destination when the previous route search is requested are read from the storage unit 21 of the terminal device 2 (S1). When the mobile phone is used at the time of the previous route search request, the coordinates of the departure place and the destination are stored in the mobile phone, and therefore the coordinates of the departure place and the destination are read from here.

Next, the read destination is automatically converted into a departure place, and the departure place is converted into a destination and transmitted to the base station 1 to request the creation of a reverse route (S2). Further, the terminal side notifies the base station that it has the data transmitted from the base station and already stored in the storage unit, such as map data (S3). The base station side receives the starting point and the destination converted and transmitted on the terminal side, and creates a reversing guide route (S4). Then, the data necessary for the reversing guide route except for the reversing route data and the data which the terminal side has already received and stored have been notified are transmitted to the terminal side (S
5).

The terminal side receives the reverse guide route and the necessary data from the base station, outputs this to the output unit 27 and displays it (S6). [Embodiment 3] FIG. 8 is a flow chart showing another embodiment of the method of the present invention. In the case of this flowchart, the reverse path is created on the terminal side except for a part.

When the user requests the reverse route, the coordinates of the departure point when the previous route search request is made are read from the storage unit 21 of the terminal device 2 (S1). Also, the coordinates of the previous destination are read. Similar to the second embodiment, when the mobile phone is used at the time of the previous route search request, the coordinates of the starting point and the destination are stored in the mobile phone, and therefore the coordinates of the starting point and the destination are read from here. (S1). Then, the previous destination is converted to the starting point and the starting point is converted to the destination, and the reversal calculation unit 28 creates a reversed route based on the actually traveled route stored in the storage unit 21 of the terminal device 2. . At this time, the traveling direction of the route actually traveled is reversed, and the route guidance in the intersection enlarged view is reversed as shown in FIG. 3 (S2).

Next, it is judged whether or not there is one way on the reversal path (S3). If there is one-way traffic (Yes), a warning is issued by a display or voice from the output unit 27 of the terminal device,
And / or delete this part from the reverse guide route (S
4). This is to prevent one-way road from running backwards. When receiving the warning, the user can request the base station to search for a bypass route connecting both ends of the guide route that is divided for one way as shown in FIG. 4B ( S5). When making a request (Yes), the base station side receives this request, searches for a guide route for the alternative route, and transmits it to the terminal side (S6).

The terminal side receives this and incorporates the bypass route into the reverse guide route (S7). Then, a reverse guide route including the detour route is created and displayed on the output unit 27 (S
8).

When the search for the alternative route is not requested in S5 (No), the reverse guide route in which the one-way route is deleted is displayed. If S3 is (No), that is, if there is no one-way road, the process proceeds to S8.

[0041]

According to the present invention, the inversion route can be easily and quickly obtained from the base station side only by the user inputting the inversion instruction. Further, by providing an inversion calculation unit on the terminal device side, the inversion path can be obtained in the same manner. At that time, also in the enlarged view of the intersection, it is possible to obtain the route guidance display in which the route is reversed and the traveling direction is displayed at the upper part of the screen.

Further, since it is not necessary to retransmit all the data from the base station when obtaining the inversion route,
The amount of data to be transmitted can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a system to which a map information distribution method according to an embodiment of the present invention is applied.

FIG. 2 is a diagram showing the configuration of another system to which the map information distribution method according to the embodiment of the present invention is applied.

FIG. 3 is a diagram showing a map image including an initial guide route and a map image including a reverse route thereof.

FIG. 4 is a diagram showing how an inverted route is displayed on a map screen when an initial guide route includes a one-way route.

FIG. 5 is a flowchart of the first embodiment of the present invention.

FIG. 6 is a flow chart of the first embodiment of the present invention.

FIG. 7 is a flow chart of a second embodiment of the present invention.

FIG. 8 is a flow chart of a third embodiment of the present invention.

[Explanation of symbols]

1 ... Base station 11 ... Map DB 12 ... Map management department 13a ... Image creation unit 13b ... Route calculation unit 13c ... Guidance information creation section 14 ... Navigation guidance management section 15 ... Terminal management unit 16a ... Transmission unit 16b ... Reception unit 2 ... Terminal device 21 ... Storage unit 22 ... Reception information management unit 23a ... Image management unit 23b ... Route management unit 23c ... Guidance information management section 24 ... Navigation function management unit 25 ... Vehicle information input section 26 ... Input section 27 ... Output unit 28 ... Inversion calculator 3 ... Mobile phone 4 ... antenna 5 ... Broadcasting station or broadcasting satellite

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) H04Q 7/20 H04Q 7/04 Z (72) Inventor Kazuya Sako 1-2-2 Goshodori, Hyogo-ku, Hyogo Prefecture No.F Term in Fujitsu Ten Co., Ltd.

Claims (12)

[Claims] 1. A communication navigation system for transmitting road map information from a base station to a plurality of movable terminal devices, wherein a route reversal instruction is transmitted from the terminal device to the base station,
The base station creates an inversion route with the departure place transmitted from the terminal device at the time of the previous route search request as the destination and the destination as the departure place, and transmits road map information including the inversion route to the terminal device. , Acquisition method of inverted route for communication type navigation. 2. The terminal device also transmits identification information of the terminal device when requesting a route search to the base station, and when the base station receives an inversion instruction from the terminal device, the identification information is added to the identification information. The reverse route acquisition method for communication navigation according to claim 1, wherein a departure place and a destination at the time of the route search request of the terminal device are identified based on the terminal device. 3. The reverse route acquisition method for communication navigation according to claim 2, wherein the identification information is one of a terminal ID, a mobile phone number, and an Internet IP address. 4. The origin and destination are represented by coordinates, and the coordinates and the identification information are stored in a storage unit of a base station.
The reverse route acquisition method for communication navigation according to claim 2. 5. A communication navigation system for transmitting road map information from a base station to a plurality of movable terminal devices, wherein the terminal device stores a storage unit of the terminal device when transmitting a route reversal instruction to the base station. The information of the starting point and the destination at the time of the route search request stored in the above is transmitted to the base station as the information of the destination and the starting point, respectively, and the base station receiving the instruction, A reverse route acquisition method for communication navigation, which creates a reverse route based on a destination and transmits road map information including the reverse route to the terminal device. 6. The inversion route for communication navigation according to claim 1, wherein the base station receiving the route inversion instruction transmits the road map information excluding the already transmitted information to the terminal device regarding the inversion route. Acquisition method. 7. The reversing path includes a one-way path,
The reverse route acquisition method for communication navigation according to claim 1, wherein the base station searches for a detour in this portion and transmits it to the terminal device. 8. A communication-type navigation system for transmitting road map information from a base station to a plurality of movable terminal devices, wherein when a route reversal instruction is given to the terminal device, a previous route search request is issued from a storage unit of the terminal device. The information of the starting point and the destination at the time is read, the starting point is converted to the destination, the destination is converted to the starting point, and the terminal device creates an inversion route based on the converted destination and the starting point. , Acquisition method of inverted route for communication type navigation. 9. The departure point and the destination are represented by coordinates, and the coordinates are stored in a storage unit of the terminal device.
The method for acquiring the reverse route of the communication navigation according to. 10. The terminal device requests the base station to search for a detour route of this portion when the reversal route includes a one-way route, and the base station transmits the detour route searched for to the terminal device. 8. The method for acquiring a reverse route of communication navigation according to item 8. 11. The reversing route includes an enlarged intersection image, and the enlarged intersection image is displayed so that the traveling direction of the reversing route is at the top. The method for acquiring the reverse route of the communication type navigation described. 12. The method according to claim 1, wherein the reversing route includes a one-way road, a warning is issued from the output unit of the terminal device, and / or the one-way road is deleted. The method for acquiring the reverse route of the communication type navigation described.