JP2002298284A - Navigation system and navigation guide method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation system and navigation guide method capable of providing proper guide information according to the movement of a user and supporting the user so as to efficiently move to a designation in the movement of the user mainly by use of public transportation, and further conforming to a sudden change of route by an accident or the like. SOLUTION: The present position and designation are transmitted from a portable navigation device to an information center. In the information center, a guide route from the present position to the designation is retrieved by use of databases such as time table, station yard map, general map and the like, and sets passing points on the guide route. The guide information to the first passing point is formed and transmitted to the portable navigation device. In the portable navigation device, the guide information is stored in a data memory part, and a guide message according to the movement of the user is displayed on a display part by a dialogue input. When the user arrives at the passing point, he acquires the next guide information from the information center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for providing guide information as the user moves to a destination by using public transportation such as a train, a subway, a bus, etc., so as to smoothly reach the destination. TECHNICAL FIELD The present invention relates to a navigation system and a navigation guidance method that support easy movement.

[0002]

2. Description of the Related Art In addition to a private car, public transportation such as a train, a subway and a bus, a rental car and a bicycle are available as means of transportation when a person travels. In the case of a car, it is possible to travel to a destination while receiving appropriate guidance as the vehicle moves by the car navigation device. However, a system for appropriately providing guidance information in accordance with the movement of the user has not been put to practical use with other moving means.

For example, Japanese Patent Application Laid-Open No. 2000-142408 proposes a portable information terminal that provides information on a next arrival station on a train. Japanese Patent Application Laid-Open No. 9-62991 discloses that an in-vehicle terminal (car navigation) and a mobile terminal are linked to provide guidance to a parking lot near a destination by an in-vehicle terminal, and guidance from a parking lot to a destination by a mobile terminal. A system has been proposed. Further, JP-A-10-275296
For example, there is proposed a system for detecting a position by a PHS (Personal Handyhone System) or the like and transmitting a map image or the like to the PHS or a designated facsimile.

However, Japanese Patent Laid-Open No. 2000-14240 described above
Neither of the techniques disclosed in Japanese Patent Application Publication No. 8 and Japanese Patent Application Laid-Open No. 10-275296 provide guidance information as the user moves. In addition, the technology disclosed in Japanese Patent Application Laid-Open No. 9-62991 also provides guidance information in real time by a vehicle-mounted terminal up to a parking lot, but provides guidance information along with the movement of a user from the parking lot to a destination. They are not provided as appropriate.

[0005]

As described above, according to the prior art, since none of the prior arts provides guidance information as the user moves, if the action according to the guidance cannot be taken, You have to decide for yourself what action to take, which can be confusing.

For example, when traveling by train, the departure platform and arrival platform may be different depending on the time. Therefore, when the train is missed or the train cannot be taken due to a train delay or accident, etc. You may not know which home to go to next.
In addition, even if it is known from a timetable or the like which home to move to, it may not be possible to know the route to the target home. Even if there is a map inside the station premises, you need to decide the route to the target platform yourself,
It is not always possible to get to the target home by the shortest route, and it may take time.

SUMMARY OF THE INVENTION An object of the present invention is to provide guidance information as needed when a user travels mainly using public transportation so that the user can travel efficiently to a destination. Another object of the present invention is to provide a navigation system and a navigation guidance method that can cope with a sudden change in route due to an accident or the like.

[0008]

A navigation system according to the present invention includes a display unit and a data storage unit.
A portable navigation device in which a destination is set by a user, position detecting means for detecting a current position of the portable navigation device, a communication means, a timetable database containing a timetable of public transportation, and a station yard map Station database which records the current position and the destination of the portable navigation device via the communication means, searches for a recommended route between them, and provides guidance information according to the recommended route. And an information center for sending the guidance information to the portable navigation device via the communication line.

In the present invention, the current position of the user of the portable navigation device is detected by the position detecting means. Then, the information center searches for a recommended route from the current position of the user to the destination using the timetable database and the station premises map database, and creates guidance information according to the recommended route. This guidance information is sent from the information center to the portable navigation device via a communication line, and is stored in the data storage unit of the portable navigation device. The portable navigation device appropriately displays guidance information on a display unit according to the movement of the user, and guides the user to a destination. Thereby, the user can move efficiently to the destination. In addition, by managing information on accidents and the like at the information center, it becomes possible to search for a new recommended route when a section that hinders traffic occurs due to an accident or the like. As a result, the user can be guided to the destination while avoiding a section that hinders traffic.

In the present invention, it is preferable that the guidance information from the current position of the user to the destination is not transmitted at once, but is transmitted at each of one or more passing points on the route. This has the advantage that the storage capacity of the data storage unit of the portable navigation device can be reduced. The navigation guidance method of the present invention is a navigation guidance method for transmitting and receiving data between a portable navigation device and an information center via a communication line and guiding a user of the portable navigation device to a destination. The navigation device transmits data indicating the destination and the current position to the information center via the communication line, and the information center receives the data transmitted from the portable navigation device, and receives the data from the current position. Searching for a recommended route to the destination, setting a passing point on the recommended route, creating guide information at least to the next passing point, transmitting this guide information to the portable navigation device, The portable navigation device stores the guide information sent from the information center in a data storage unit, It provides the user reads the guidance information from the data storage unit in association with the movement, when arriving at the passing point, to connect to the information center, characterized in that to receive the next guidance information.

In the present invention, data is transmitted and received between a portable navigation device and an information center via a communication line, and a user is guided to a destination. At this time, the information center searches for a recommended route from the current position of the user to the destination, sets one or more passing points on the recommended route, creates guide information for each passing point, and Send to navigation device. In the portable navigation device, the guide information sent from the information center is stored in a data storage unit, and the guide information is sequentially read from the data storage unit as the user moves, and is displayed on a display unit. When the user arrives at the passing point, the portable navigation device connects to the information center via the communication line and receives guidance information to the next passing point (or destination).

In the present invention, guidance information is received by connecting to the information center at each passing point, and the guidance information is displayed on the display unit as the user moves. Thereby, the user can move along the optimal route to the destination. Also, since the information center receives data indicating the current position of the portable navigation device,
When it is not possible to move according to the guidance, the recommended route is searched again, and the user can be guided along the new recommended route.

[0013] The information center, for example, when notified from an external organization that a section having a hindrance due to an accident or the like has occurred, re-searches for a recommended route that does not pass through a section with a hindrance, and renews a new route. Create guidance information according to the recommended route. Accordingly, the user can quickly and comfortably move to the destination without passing through a section that hinders traffic.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing a navigation system according to an embodiment of the present invention. The navigation system according to the present embodiment includes a portable navigation device 10 carried by a user and an information center (server) 20 connected to the portable navigation device 10 via a communication line.

The portable navigation device 10 comprises a control unit 11, a position detection unit 12, a display unit 13, a communication unit 14, a data storage unit 15, and an operation unit 16. The control unit 11 includes a position detection unit 12, a display unit 13, a communication unit 14, a data storage unit 15, and an operation unit 1 according to a predetermined program.
6 is a microcomputer that controls various types of processing.

The position detector 12 is, for example, a GPS (Global
Positioning System) A GPS receiver that detects a position (latitude / longitude) by a radio wave from a satellite. The position detection unit 12 can detect the current position in real time. As a method for detecting the current position, there is a method using a PHS or a mobile phone. In this case, since the location information is obtained from the location information service center of the PHS or the mobile phone, the portable navigation device 1 is acquired.
It is not necessary to provide a position detection unit 12 such as a GPS receiver in 0.

In addition, the portable navigation device 10 includes a speedometer, a speedometer, and the like in order to enhance the position accuracy by complementing the position detected by the GPS receiver or the position information service center.
A distance meter, an accelerometer, a gyro, or the like may be provided. The display unit 13 is, for example, a liquid crystal panel or an organic EL (Elec).
(tro-Luminescence) panel, which displays guidance information in characters or images. The communication unit 14 connects to the information center 20 via a communication line, and transmits and receives data. In the present embodiment, the portable navigation device 10 includes the communication unit 1
It is assumed that the mobile phone function is built in as 4,
A PHS or other communication device may be built in. In addition, a mobile phone or a PHS or the like and the navigation device 10 may be connected by a cable so as to be able to communicate with the information center 20.

The data storage section 15 is composed of a semiconductor memory and stores data (guide information) sent from the information center 20. The operation unit 16 is provided with keys (character / number keys) for inputting characters and numerals, and other operation keys. The user operates the operation unit 16 to input a destination and various commands.

On the other hand, the information center 20 includes a control unit 21, a timetable database 22, a station premises map database 23,
Map (general map) database 24, traffic information acquisition unit 2
5 and a communication unit 26. Control unit 21
Is a timetable database 2 according to a predetermined program.
2. Station premises map database 23, map database 2
4. A computer that controls the traffic information acquisition unit 25 and the communication unit 26 and executes various processes.

The timetable database 22 is a database of timetables for trains, subways, aircraft, buses, and the like.
The station campus map database 23 is a database of main station campus maps (electronic maps), and includes a station campus home,
The positions of stairs, ramps, escalators, elevators, ticket counters and ticket gates, and the positions of bus stops and taxi stands in front of the stations are recorded. In the station premises map database 23, the absolute position (latitude / longitude) or the relative position of the branch point of the passage can be known. A branch point of a passage is called a node, and a connected portion of two nodes is called a link. Each link is provided with a basic cost that is used as a basis for cost calculation when searching for a recommended route.

The map database 24 stores a map (electronic map) for each area divided into longitude and latitude widths of an appropriate size according to the scale. In the map database 24, the shapes of roads, lakes, marshes, parks, and the like are represented by a set of nodes represented by latitude and longitude. A road is represented by a connection of two or more nodes, and a portion connecting two nodes on the road is called a road link. The road links in the map database 24 are also provided with basic costs that are the basis for calculating costs when searching for a recommended route.
Further, the map database 24 records the location of a building (including a store), a station, a bus stop, or the like that serves as a mark for route guidance.

The traffic information acquisition unit 25 is connected to a railway company, a bus company, an airline company, or another traffic information provider (hereinafter, simply referred to as "traffic information provider") via a communication line. Obtain delays, accidents, suspensions and other traffic information of trains and aircraft from traffic information providers. The communication unit 26 is connected to the portable navigation device 10 via a communication line to transmit and receive data.

Hereinafter, the operation of the navigation system according to the present embodiment will be described. FIG. 2 is a diagram showing an outline of an operation of the portable navigation device according to the present embodiment up to arrival at a destination. In the following description, it is assumed that the portable navigation device 10 is connected to the information center 20 by a built-in mobile phone. It is assumed that the position detecting unit 12 is configured by a GPS receiver.

First, the user sets a destination. Here, the user operates the operation unit 1 of the portable navigation device 10.
6 is operated to input the address or facility name of the destination. When it is sufficient to receive guidance to a station near the destination, the station name may be input as the destination. When the information center 20 is provided with a telephone number database capable of specifying an address from a telephone number, the user inputs a destination telephone number to the portable navigation device 10 and inputs the information to the information center 2.
0, and the information center 20 may identify the position of the destination from the telephone number.

When the destination is set by the user, the control unit 11 of the portable navigation device 10 detects the latitude and longitude of the current position by the position detection unit 12. And
A communication line is connected to the information center 20 by controlling the communication unit 14, and the destination and the latitude / longitude of the current position are stored in the information center 2.
Send to 0. At this time, the user can specify a search option as needed.

The search option is for setting conditions for searching for a recommended route in the information center 20. For example, when time priority is specified as a search option, the information center 20 can arrive at the destination in the shortest time. Find a route. Further, when the priority of the transportation cost is designated as the search option and the desired arrival time is further designated, the information center 20 searches for the route with the lowest transportation cost among the routes that can reach the destination by the designated desired arrival time. I do.

Other search options include shortest walking time (in other words, maximization of the ratio of travel time by vehicle), whether to use seat designation, and whether to use an airplane as the search range. And a barrier-free route search (search for a route that can reach a destination without using stairs or the like). Also, as a search option,
You can also specify which vehicles you want to use (trains, buses, subways, airplanes, taxis, etc.) and which vehicles you do not want to use.

When the information center 20 receives the destination, the latitude / longitude of the current position, and the search option from the portable navigation device 10, the information center 20 uses the timetable database 22, the station premises map database 23, and the map database 24 to create a recommended route. Explore. At this time, the control unit 21 extracts a corresponding link according to the search option and increases or decreases the cost of the link, and then executes a simulation calculation such as a known horizontal search method or Dijkstra method in consideration of the current time. Then, two routes having the lowest total cost are searched. Then, these routes are referred to as recommended routes (first and second routes).
Recommended route). However, if the traffic information providing organization notifies a section that cannot be passed due to an accident or the like or a section that is expected to take a long time to pass, the recommended route is searched by excluding the section.

Thereafter, the control unit 21 of the information center 20
A point on the recommended route that can communicate with the portable navigation device 20 is searched for, and passing points are set at appropriate intervals. In the example shown in FIG. 2, three points A to C are set as passing points. Then, the information center 20 creates guidance information up to the first passing point (passing point A) in the portable navigation device 10 and transmits it to the portable navigation device.

Upon receiving the guidance information from the information center 20 to the passing point A, the portable navigation device 10 stores the received information in the data storage unit 15. After that, the control unit 11 reads guidance information from the data storage unit 15 as appropriate and displays it on the display unit 14 to guide the user to the passing point A. At this time, the portable navigation device 10
Displays guidance information according to the current position of the user by interactive input.

FIG. 3 is a diagram showing a display example of guidance information from the departure point to the passing point A. When the information center 20 receives the departure point, destination, and search option from the portable navigation device 10, the information center 20 takes two recommended routes based on these data (in the example shown in FIG. Route and route to get on the train departing at 10:26)
, And set a passing point in the recommended route. Then, the information center 20 creates guide information up to the first pass point, and transmits the guide information to the portable navigation device 10. In the portable navigation device 10, the guidance information sent from the information center 20 is stored in the data storage unit 15.

Thereafter, the control unit 11 of the portable navigation device 10 reads the guidance information from the data storage unit 15 and displays the first guidance on the display unit 13 as shown in FIG. FIG. 3 shows a screen for inquiring of the user which of the two recommended routes searched in the information center 20 is to be selected. The example illustrated in FIG. 3 indicates that a train departing at 10:11 and a train departing at 10:26 are available.

Here, the user selects which route to use. For example, when trying to use a train departing at 10:11, the user selects the “1” key (“” indicates a numeric key; the same applies hereinafter) of the operation unit 16 and selects 10:02.
To use the 6-minute train, select the "2" key. Here, it is assumed that the “1” key is pressed. As a result, the portable navigation device 10 displays a message on the display unit 13 as shown in FIG. 3 to guide the route to the ticket counter, and prompts the user to purchase a ticket. Here, the user presses the "1" key when following the guidance, and presses the "0" key when the user cannot follow the guidance.
When the "0" key is pressed, the display returns to the display screen of FIG.

When the "1" key is pressed on the display screen of FIG. 3, the screen changes to the screen of FIG. 3, and a message for guiding to the platform of the designated train is displayed on the display unit 13. Press the "1" key when following the guidance, and press the "0" key when unable to follow the guidance. When you press the “0” key,
It returns to the display screen of FIG. When the "1" key is pressed, a message is displayed as shown in FIG.

The message shown in FIG.
This is the message when you arrive at the station. If you are moving according to the guidance, press the "1" key. Although the vehicle is different, press the "2" key when you are on the guided train, and the train is different. In this case, press the "3" key. When the "1" key is pressed in FIG. 3, the portable navigation device 10 connects to the information center 20 via a communication line, and sends the current position and the destination to the information center 20. In the information center 20, for example, the portable navigation device 10 on the way of guidance from the telephone number
And recognizes from the transmitted data that the user is moving according to the guidance. And
The guide information of the recommended route to the next passing point B is created and sent to the portable navigation device 10.

However, if a section having a trouble in traffic occurs due to an accident or the like before the user arrives at the passing point A, and these sections are included in the recommended route, the information center 20 corresponds to the section. Re-search for a recommended route that does not pass through the section,
The guide information to the next passing point on this recommended route is created. In the above description, the portable navigation device 10 sends data such as the current position and the destination to the information center 20 at the passing point A, and then the next passing point B at the information center 20.
The guide information from the passing point A to the passing point B may be created and held at the information center 20 while the user moves from the departure place to the passing point A. .

When the "2" key is pressed on the screen shown in FIG. 3, the portable navigation device 10 connects to the information center 20 via a communication line, and displays data indicating that the current position and the destination are different from the vehicle. Is sent to the information center 20. As a result, the information center 20 regenerates a guidance message according to the difference between vehicles and sends it to the portable navigation device 10. In this case as well, if a section that hinders traffic occurs due to an accident or the like, a recommended route that does not pass through the section is searched again, a pass point is set, and guidance information to the next pass point is created. .

When the "3" key is pressed on the screen shown in FIG. 3, the portable navigation device 10 connects the line to the information center 20, and indicates that the current position and the destination are different from the train. The data is sent to the information center 20. Thus, the information center 20 again searches for a recommended route from the current position to the destination. Then, a point on the recommended route that can be connected for communication with the portable navigation device 10 is searched for and set as a passing point. Then, the information center 20
Transmits guidance information to the next pass point to the portable navigation device 10.

In the portable navigation device 10, the guide information stored in the data storage unit 15 is updated to newly sent guide information, and the display unit 1 is updated by interactive input.
3 is displayed sequentially to guide the user to the next passing point B. In this manner, in the present embodiment, the guide information is sent from the information center 20 to the portable navigation device 10 for each passing point, and the guide information is sequentially displayed on the display unit 13 by interactive input so that the user can Guide to the ground.

According to the portable navigation device of this embodiment, the information center 20 is provided with the timetable database 22 and the station premises map database 23, and is recommended by the timetable database 22 and the station premises information database 23. Since the route is searched, the transfer from the home to another platform can be smoothly performed. In addition, the current position is sent to the information center 20 for each passing point, and the recommended route is re-searched when the vehicle is not moving according to the guidance. Therefore, even if the train is missed or the schedule is advanced, an appropriate Can be received. Furthermore, since the recommended route is searched using the station premises map database 23, in the case of a station having a plurality of exits, it is possible to guide the user to the next transportation means or the exit most convenient for the destination.

Further, in this embodiment, a search option can be set. Thereby, a recommended route according to the user's request is searched. For example, when the shortest walking time is designated, if there are a plurality of options for changing to the same train, a route with the shortest walking time is searched. It is also possible to search for a barrier-free route. Further, in the present embodiment, when the information center 20 obtains traffic information from a traffic information providing organization and there is a section in the recommended route that impedes traffic due to an accident or the like, a recommended route that does not pass through the section is automatically determined. The mobile terminal 10 generates a guide information according to the searched recommended route, and transmits the guide information to the portable navigation device 10. Accordingly, the user can quickly and comfortably reach the destination without passing through a section that is hindered by an accident or the like. That is,
The navigation system and the navigation guidance method according to the present embodiment can flexibly cope with an unexpected accident or a change in route, and can comfortably guide a user to a destination.

In the above-described embodiment, a case has been described where guidance information for each passing point up to the next passing point is transmitted from the information center 20 to the portable navigation device 10, but the data storage of the portable navigation device 10 is described. Part 15
If there is sufficient storage capacity, guidance information from the departure point to the destination may be transmitted at one time. In this case, only when it is impossible to act according to the guidance, the information center 20
To find a new recommended route.

Further, when a section that hinders the passage of the recommended route occurs due to an accident or the like, the information center 20 may notify the portable navigation device 10 of the change of the recommended route. Further, in the above embodiment, the guide information corresponding to the current position of the user is provided by the interactive input. However, the guide information corresponding to the current position detected by the position detection unit 12 may be provided. .

[0044]

As described above, according to the navigation system of the present invention, the information center searches for the recommended route from the current position of the user to the destination using the timetable database and the station premises map database. , And creates guidance information according to the recommended route. This guidance information
The information is sent from the information center to the portable navigation device via the communication line, and is stored in the data storage unit of the portable navigation device. Then, the portable navigation device appropriately displays guidance information on the display unit according to the movement of the user, and guides the user to the destination. Thereby, the user can efficiently move to the destination according to the guidance information. Also, for example, by managing information such as accidents at the information center, it is possible to re-search for a recommended route that does not pass through the section when a section that hinders traffic occurs due to an accident or the like. The user can be quickly and comfortably guided to the destination while avoiding a hindrance section.

According to the navigation guidance method of the present invention, data is transmitted / received between the portable navigation device and the information center via a communication line to guide the user to the destination. At this time, the information center searches for a recommended route from the current position of the user to the destination, sets one or more passing points on the recommended route, creates guidance information for each passing point, Send to type navigation device. In the portable navigation device, the guide information sent from the information center is stored in a data storage unit, and the guide information is sequentially read from the data storage unit as the user moves, and is displayed on a display unit. When the user arrives at the passing point, the portable navigation device connects to the information center via the communication line and receives guidance information to the next passing point (or destination).

In the present invention, guidance information is received by connecting to the information center at each passing point as described above, and the guidance information is displayed on the display unit as the user moves. Thereby, the user can move along the optimal route to the destination. Also, since the information center receives data indicating the current position of the portable navigation device,
When it is not possible to move according to the guidance, the recommended route is searched again, and the user can be guided along the new recommended route.

[Brief description of the drawings]

FIG. 1 is a diagram showing a navigation system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an outline of an operation of the portable navigation device according to the present embodiment until arrival at a destination.

FIG. 3 is a diagram illustrating a display example of guidance information from a departure point to a passing point A;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Portable navigation device, 11, 21 ... Control part, 12 ... Position detection part, 13 ... Display part, 14, 26 ... Communication part, 15 ... Data storage part, 16 ... Operation part, 20 ... Information center, 22 ... Timetable database, 23: Station premises map database, 24: Map database, 25: Traffic information acquisition unit.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 17/30 170 G06F 17/30 170C 5J062 G09B 29/00 G09B 29/00 A 5K067 29/10 29/10 A H04Q 7/20 H04Q 7/04 Z F term (reference) 2C032 HB05 HB08 HB22 HB25 HC11 HC13 HD13 HD16 2F029 AA07 AB01 AB07 AB13 AC02 AC06 AC13 AC16 AC18 5B075 KK07 KK13 KK33 KK40 ND06 U20 ND20 U20A30P DD21 GG01 GG03 GG11 GG14 GG15 GG17 GG22 5H180 AA21 BB05 BB15 CC12 FF04 FF05 FF25 FF33 5J062 AA05 BB01 CC07 5K067 AA34 BB36 EE02 EE10 EE16 FF03 FF23 GG01 GG11 HH23 JJ53

Claims (8)

[Claims] 1. A portable navigation device comprising a display unit and a data storage unit, wherein a destination is set by a user, a position detection unit for detecting a current position of the portable navigation device, a communication unit, and public transportation. A timetable database containing an institutional timetable and a station map database containing a station map are acquired, and the current position and the destination of the portable navigation device are acquired via the communication means, and a time interval between them is obtained. An information center for searching for a recommended route, creating guidance information according to the recommended route, and sending the guidance information to the portable navigation device via the communication line. . 2. The information center according to claim 1, wherein:
The navigation system according to claim 1, wherein a plurality of passing points are set, guidance information for each passing point is created, and the guidance information is sent to the portable navigation device. 3. The information center according to claim 1, wherein when the user cannot move according to the guidance information, the information center searches again for a recommended route from a current position of the portable navigation device to the destination. Navigation system as described. 4. A navigation guidance method for transmitting and receiving data between a portable navigation device and an information center via a communication line and guiding a user of the portable navigation device to a destination, wherein the portable navigation device comprises: Transmitting data indicating the destination and the current position to the information center via the communication line, receiving the data transmitted from the portable navigation device, and transmitting the data from the current position to the information center. Searching for a recommended route to the ground, setting one or a plurality of passing points on the recommended route, creating guidance information for each passing point, transmitting the guidance information to the portable navigation device, The navigation device stores the guide information sent from the information center in a data storage unit, and stores the guide information in accordance with the movement. Provided to the user from the part sequentially reads out guidance information, when arriving at the transit points, navigation guidance method to connect to the information center, characterized in that to receive the next guidance information. 5. The navigation guidance method according to claim 4, wherein the information center includes a premises map database in a station of a public transportation facility, and creates transfer guidance information in the station premises. 6. The information center according to claim 4, wherein the information center includes means for acquiring traffic information, and re-searches for a recommended route when detecting that a section having a hindrance has occurred. Navigation guidance method. 7. The portable navigation device provides guidance information according to a current position of a user among guidance information stored in the data storage unit by interactive input. Navigation guidance method described in. 8. The information center searches for a plurality of routes as the recommended route, and the portable navigation device provides guidance information along a route selected by a user. Navigation guidance method described in.