JP4568953B2 - Server device for server communication type navigation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present inventionServer device for server communication type navigation systemAbout.
[0002]
[Prior art]
The navigation system guides a moving body such as a person or a vehicle along an appropriate route from the current location to the destination. A conventional navigation system includes a database stored in a CDROM or DVD. This database stores a list of destination facilities. The destination facility can be searched without difficulty by selecting an easy-to-understand menu. In addition, advertisement information corresponding to the destination is also stored.
[0003]
FIG. 13 shows a menu structure for searching for a destination facility. The menu structure (menu hierarchy) 51 for searching the facility data 54 is as follows. The menu structure until the facility data 54 is reached starts from selecting a genre search, a telephone number (TEL) search, or a 50-sound search. The genre search is a search method for reaching the target facility data by selecting the genre (hotel, station, prefecture where the facility is located, along the railway line, etc.) to which the facility associated with each facility data belongs. The TEL search is a method for searching for a facility having a corresponding telephone number by inputting all or part of the telephone number of the facility. The 50-sound search is a search method that reaches the corresponding facility data by inputting all or part of the kana characters constituting the facility name.
[0004]
When the menu structure 51 descends to the lower layer in order, the menu that has been passed becomes an AND search condition, and predetermined facility data 54 can be allocated via the data link 52. Many facility data 54 are managed in the facility data database 53.
[0005]
FIG. 14 is a structural diagram of facility data. Each facility data associates a facility name such as Tokyo Disneyland, an address where the facility is located, and a telephone number of the facility. In addition, different expressions are assigned as search keywords even for the same kind of search items so that facility data can be easily searched. Each facility data is associated with a plane coordinate (XY coordinate) on the ground of the facility (not shown).
[0006]
[Problems to be solved by the invention]
However, the conventional example has the following problems. First, the facility data database stored in the CDROM or DVDROM is fixed. The database could not be updated even if the actual facilities persisted or the telephone number changed over time, and it was uneconomical to endure old data or purchase a new CDROM. The same was true for advertising information.
[0007]
On the other hand, it is conceivable that the navigation system is a client / server system by wireless communication and a necessary database is managed on the server side. However, in order to keep the facility database on the server side always up-to-date, there is a problem that personnel labor is required and labor costs increase.
[0008]
In addition, when a database necessary for navigation is stored in a server, it is necessary to always connect to the server from a client installed in the mobile body, which is uneconomical in communication cost. In addition, it takes a relatively long time until the response of the search result is received from the server, and there is a case where it is not quick.
[0009]
OBJECT OF THE INVENTION
It is an object of the present invention to provide a server communication type navigation system that can improve the disadvantages of the conventional example and can use the latest facility database as economically as possible.
[0010]
[Means for Solving the Problems]
(1) In order to achieve the above object, according to the first aspect of the present invention, a database preliminarily storing a keyword specifying a destination, a Web address database storing Web page addresses, and a database stored in the database. If an address of a Web page including any one of the keywords specifying the destination is searched from the Internet, and any of the keywords is included in the Web page, an address name that can specify ground coordinates is When it is determined that it is included, information processing means for associating the address of the Web page with the keyword and storing it in the Web address database and an external mobile device transmitted Receiving means for receiving a keyword specifying the destination; and the received keyword The Web page of the address associated with, or including the display information of the Web page address of the Web page is an index, and returning means for returning to the outside of the mobile device that sent the keyword, theThe database includes a Web search index having the same structure as the destination search index stored in the mobile device, and the information processing means uses the Web search address as the Web search index. When the keyword received by the receiving means is a search condition input according to the search index, the reply means refers to the Web search index structure and stores the information in the Web address database. Search the Web address database, and return the address of the associated Web page or the display information of the Web page indicated by the address of the Web page to the external mobile device that has transmitted the keyword.The server apparatus of the server communication type navigation system characterized by the above-mentioned.
(2) In the invention according to claim 2, a coordinate database storing the coordinate data of the facility that is linked to the address of the Web page stored in the Web address database and introduced to the Web page indicated by the address of the Web page is stored. And when the keyword is a destination search condition, the reply means obtains the coordinate data of the facility linked to the address of the Web page corresponding to the search condition from the coordinate database, and the external mobile unit The server apparatus of the server communication type navigation system according to claim 1, wherein the server apparatus is returned to the apparatus.
(3) In the invention of claim 3,The database includes a facility database that is the same as the facility database stored in the mobile body and has facility data associated with the web page address of the web address database, and the reply unit includes the keyword received by the receiving unit. When the facility data is searched according to the search condition input according to the search index, the Web address database is searched with reference to the facility database, and the address of the associated Web page or the Web page The display information of the Web page indicated by the address is returned to the external mobile device that has transmitted the keyword.A server device for a server communication type navigation system according to claim 1 is provided.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
[0026]
[System configuration]
[0027]
FIG. 1 is an overall configuration diagram of a server communication type navigation system according to the present invention. A car navigation device (car navigation) 10 mounted on a vehicle 10 is connected to a wireless communication device 10a such as a mobile phone or a PHS. The base station 30 of the radio telephone network that communicates with the radio communication device 10 a is connected to the telephone network 40.
[0028]
On the other hand, the dedicated server 20 that communicates with the car navigation system 10 is connected to the telephone network 40 via a communication device 20a such as a modem, and can access various Internet information (Web pages) 50 via an Internet line (dedicated line). It is like that.
[0029]
[Configuration of car navigation system]
[0030]
FIG. 2 is a configuration diagram of the car navigation system 10. The control means 11 is provided with an input means 12, a display means 13, a GPS receiver 14, and a storage means 15.
[0031]
The control means 11 realizes a function as a car navigation system by CPU program processing. Further, the control means 11 has an interface for communicating with the peripheral device. The input means 11 is a remote control capable of selecting a search menu and inputting characters and numerical values by infrared communication with the control means 11. The display unit 13 is a liquid crystal display, a head-up display, or the like that displays the display data configured by the control unit 11 in the video RAM. The GPS receiver 14 detects the current location of the vehicle 100 based on a signal from a GPS satellite and inputs it to the control means 11. The storage means 15 is composed of RAM, ROM, CDROM, etc., and stores the search menu configuration 51 described in the conventional example, the facility database 53, and these data links 52. The storage unit 15 also stores other databases necessary for car navigation functions (not shown).
[0032]
[Dedicated server configuration]
[0033]
Next, FIG. 3 is a configuration diagram of the dedicated server 20. The information processing means 21 is provided with a communication device 20b connected to the Internet line and a storage means 22. The communication means 20b to the Internet line is a DSU built-in router or the like. The information processing means 21 performs contact with the car navigation 10 and information search for the storage means 22 by CPU program processing. The storage means 22 is composed of RAM, ROM, HDD and the like. This storage means 22 stores a Web search index structure 23 having the same structure as the search menu structure 51 of the car navigation system 10. This Web search index structure 23 is linked to a Web address database 24 by a data link 27. The web address database 24 stores URLs of a large number of web pages. The Web address database 24 is linked to the facility database 25 via a data link 28. The facility database 25 manages the same facility data as the facility database stored in the car navigation system 10. The web address database 24 is linked to the coordinate database 26 via a data link 29. The coordinate database 26 stores the plane coordinates (XY coordinates) on the ground of the facility introduced on the Web page indicated by the Web address.
[0034]
Here, the link state between the Web search index structure 23 and the Web address database 24 is shown in FIG. As already described, the structure of the Web index structure 23 is the same as the search menu structure 51 (FIG. 13) stored in the car navigation system 10. When descending the hierarchical structure of the Web search index structure 23 to the lower layer, the Web page that eventually becomes an AND search condition for the index that has passed so far and stores information that satisfies the AND search condition. The address (URL) is selected from the Web address database 24 and linked.
[0035]
For example, the Web address linked to “Aichi Prefecture” in “Hotel” in the genre search is an address of a Web page including the character strings “Hotel” and “Aichi Prefecture”. Since there are many Web pages including the same character string on the Internet, a pair of Web addresses may be connected to the end of the Web search index structure 23.
[0036]
A coordinate database 26 is connected to the web address database 24. The web page indicated by the web address may have a detailed address of the facility introduced there, and the coordinates in the coordinate database 29 are the plane coordinates of the ground corresponding to the detailed address. Link to address.
[0037]
Next, FIG. 5 shows a link state between the facility database 25 and the Web address database 24. The facility database 25 is the same as the information in the facility database 53 stored in the car navigation system 10, and each facility data has information on the facility name, address, and telephone number. In addition, each facility data has a plurality of search keywords with different expression formats of these information (FIG. 14). Here, the Web address linked to each facility data is a Web address of a Web page that includes information about the facility (facility name, address, telephone number) as a character string.
[0038]
[Search processing in car navigation systems]
[0039]
Next, a procedure for the car navigation system 10 to obtain the route guidance destination will be described with reference to the flowcharts of FIGS. This procedure is realized by program processing by the CPU of the car navigation system 10.
[0040]
The user of the car navigation system 10 selects the search menu 51 displayed on the display means 13 (S1). The selection is performed by the input means 12.
[0041]
First, a search method is designated (S2). That is, the search menu structure 51 is selected from 50-sound search, telephone number search, or genre search.
[0042]
Next, a search condition is input (S3). That is, in the case of a 50-sound search, all of the 50-sound characters constituting the facility name or a part of the characters in front thereof are input. In the case of telephone number search, the entire telephone number or a part in front of the telephone number is input. For genre search, specify the genre.
[0043]
The control means 11 searches the facility database 53 for facility data linked to the input search condition (S4, S5).
[0044]
If there is such data, the facility name, telephone number, address, etc. of the facility data are set as keywords for communication search (S6). On the other hand, if there is no corresponding data, the search condition entered in S3 is set as a keyword for communication search (S7).
[0045]
And the control means 11 asks a user whether communication search is performed (S8). This inquiry is made by the display means 13. The user inputs a request for communication search from the input means 12.
[0046]
When the process proceeds to FIG. 7 and the user's answer does not desire the communication search, the search is terminated (S11). If the facility data is searched in S5, route search and route guidance from the current location to the destination are started with the facility as the destination.
[0047]
On the other hand, if the user's answer is to search for communication, the communication search keyword set in S6 and S7 is transmitted to the dedicated server 20 (S12). Transmission is performed via the communication device 10a, the telephone network 40, and the communication device 20a on the server side.
[0048]
The dedicated server 20 searches for the presence of a Web address corresponding to the communication search keyword. If it exists, the display data of the Web address or the Web page indicated by the Web address is returned to the car navigation system 10. The processing on the server side will be described in detail later.
[0049]
When the result of the search in the dedicated server 20 indicates that the corresponding data exists, the control means 11 receives from the dedicated server 20 a list of Web addresses or display data of the Web page indicated by the Web address. Is displayed on the display means 13 (S15). When a plurality of corresponding Web addresses are searched in the search of the dedicated server 20, first, a list of searched Web addresses is displayed on the display means 13, and one of them is selected by the user. Selection is performed from the input means 12. Then, the information of the selected web address is sent to the dedicated server 20, the display data of the web page indicated by the web address sent back by the dedicated server 20 is received, and the web page is displayed on the display means 13. On the other hand, when the Web address searched by the dedicated server is narrowed to one from the beginning, the display data of the Web page indicated by the Web address is transmitted from the dedicated server 20 to the car navigation 10 and the control unit 11 The page is displayed on the display means 13.
[0050]
On the other hand, as a result of the communication search in the dedicated server 20, when the notification that there is no corresponding data is received, the control means 11 ends the search (S16). If the facility data has been searched in S5, route search and route guidance from the current location are started with the facility as the destination.
[0051]
The user browses the Web page displayed on the display unit 13 and inputs the request from the input unit 12 when he / she wants to use the facility introduced therein as the destination. The control unit 11 that has received the request for the destination introduced to the facility introduced on the Web page reads the Web address of the Web page from the storage unit 15 and transmits it to the dedicated server 20. The dedicated server 20 searches the coordinate database 26 for the coordinates of the facility linked to the received Web address, and transmits it to the car navigation system 10. The control means 11 starts route search and route guidance from the current location to the destination using the ground coordinates of the facility received from the dedicated server as the destination (S17, S18, S19).
[0052]
[Search processing on dedicated server]
[0053]
Next, processing on the dedicated server 20 side corresponding to the search processing will be described with reference to FIG. Upon receiving a communication search request from the car navigation system 10, the information processing means 21 determines whether the received search keyword is the search condition input by the user in S3 or the facility data information acquired in S6. (S21, S22).
[0054]
In the case of the search condition input by the user, the Web address database 24 is searched with reference to the Web search index structure 23. On the other hand, when the facility data information is received, the Web address database 24 is searched with reference to the facility database 25. That is, whether the Web address linked to the search condition input by the user exists or whether there is a Web address linked to the received facility data information is the data link state described in FIG. Search and obtain based on (S23).
[0055]
As a result, when a plurality of Web addresses are acquired, the list is transmitted to the car navigation system 10, the user is allowed to select one Web address, and information on the selected Web address is received. When the number of Web addresses acquired as a result of the search is one and when the Web address is narrowed down to one by the user's selection, the information processing means 21 displays the display data of the Web page indicated by the Web address via the Internet line Is downloaded to the storage means 22, and the display data of the Web page is transmitted to the car navigation system 10. At this time, if the search condition input by the user as a search keyword for communication search is received in S21, the coordinate data of the facility linked to the Web address of the search result is obtained from the coordinate database 26, and the coordinate of the facility is acquired. Data is also transmitted to the car navigation system 10 (S24, S25).
[0056]
[Collecting Internet information on a dedicated server]
[0057]
The dedicated server 20 collects Web address information stored in the Web address database 24 as needed in parallel with the Web address search process described above.
[0058]
The information processing means 21 automatically circulates a website by a robot, searches for a web page that can be linked to the web search index structure 23 or the facility database 25, stores the address of the web page, and stores the web address The data links 27 and 28 are created (S31).
[0059]
Then, the current link state is compared with the newly established link state (S32). If the current Web address database contents or the current link state needs to be updated, the contents of the Web address database 24 and the structures of the data links 27 and 28 are updated to new information (S33). The information processing means 21 repeatedly executes the above processing at regular intervals (S34).
[0060]
[Collecting Web Address Based on Web Search Index Structure 23]
[0061]
Next, a procedure for collecting Web addresses on the Internet will be described in detail. 9 and 10 show a Web address collection procedure based on the Web search index structure 23.
[0062]
The information processing means 21 circulates the web page by the robot and browses the display data of each web page (S41). Then, it is determined whether the Web page includes a keyword for each genre (S42). Here, the keywords for each genre are shown in FIG. A genre name (hotel, department store, etc.) constituting the Web search index structure 23 is associated with a plurality of different expressions that make it easy to search the genre name. Each expression is a keyword for each genre. For example, for the genre name “hotel”, a katakana expression “hotel” and an English expression “HOTEL” are associated in advance.
[0063]
If the display data of the web page being browsed does not include a keyword for each genre, the information processing means 21 circulates other web pages (S44).
[0064]
On the other hand, if any of the keywords for each genre is included, it is determined whether an address name that can specify the ground coordinates of the facility is included with an accuracy capable of route guidance in the car navigation system 10 (S43). Here, an example of an address name that can specify the ground coordinates of the facility is shown in FIG. Generally, if the level of what number, what address, and what number is described, the ground coordinates corresponding to the address can be specified.
[0065]
When the address name is not included to such an extent that the ground coordinates can be specified, the information processing means 21 circulates another Web page (S44).
[0066]
On the other hand, when the address name is included with an accuracy capable of specifying the ground coordinate, the ground coordinate corresponding to the address name is searched from the address database 31 and associated with the Web address of the currently browsed Web page (S45). . The address database 31 of FIG. 3 is a database that stores correspondence relationships between address names, names of facilities located at the addresses, telephone numbers of the facilities, and ground coordinates (XY coordinates) of the facilities.
[0067]
Then, the information processing means 11 links the Web address information of the Web page currently being browsed to the index of the genre name to which the keyword for each genre belongs. Further, in order to register the information of the Web address in the Web address database 24, it is stored in the storage means (S46).
[0068]
Next, the information processing means 21 searches for all possible telephone numbers (10 digits including the actual station number) from the display data of the currently browsed Web page (S47). As a result of this search, the Web address of the page currently being browsed is linked to the index of all telephone numbers included in the display data (S48). Further, in order to register the information of the Web address in the Web address database 24, it is stored in the storage means 22. At this time, if the telephone number is included with an accuracy capable of specifying the ground coordinates, the coordinates corresponding to the telephone number are retrieved from the address database and associated with the Web address.
[0069]
Next, the information processing means 21 searches all the character strings that can be input by the 50-sound search from the display data of the currently browsed Web page (S49). At this time, the information processing means 21 refers to the kanji dictionary 32 stored in the storage means 22 and once converts the kanji notation into kana display and searches. As a result of this search, the information processing means 21 links the Web address of the Web page currently being browsed to the indexes of all the character strings included (S50). Further, in order to register the information of the Web address in the Web address database 24, it is stored in the storage means 22. At this time, when the facility name is included with an accuracy capable of specifying the ground coordinates, the coordinate corresponding to the facility name is retrieved from the address database and associated with the Web address.
[0070]
When the processing so far is completed, the information processing means 21 circulates another Web page and repeats the processing from S41.
[0071]
[Collection of Web addresses based on information in facility database 25]
[0072]
Next, a procedure for collecting Web page addresses corresponding to information in the facility database 25 will be described with reference to FIG.
[0073]
The information processing means 21 sequentially browses Web pages on the Internet, and determines whether the display data of each Web page includes a search keyword for facility data (S51). The facility data search keyword has been described with reference to FIG. This is a conventional example stored in the car navigation system 10, but the contents of the facility database 25 stored in the dedicated server 20 are also the same.
[0074]
As a result of the determination, if the facility data search keyword is not included, the information processing means 21 circulates other Web pages (S54). On the other hand, when the search keyword of facility data is included, the information processing means 21 links the Web address of the Web page currently being browsed to the facility data to which the search keyword belongs. Further, in order to register the information of the Web address in the Web address database 24, it is stored in the storage means 22. Thereafter, the information processing means 21 circulates other Web pages and repeats the processing from S51 (S54).
[0075]
According to the present embodiment described above, the information on the facilities that can be the destination is automatically updated / expanded on the dedicated server based on the countless latest web page information, so the route always based on the latest information. Guidance can be performed, and the labor of the provider who operates the dedicated server can be suppressed.
[0076]
In addition, since the local database of the navigation device is searched first, and the destination information is received from the database of the dedicated server when the user desires, the communication type must always connect to the server to obtain the destination information. Compared to the navigation system, it is economical in terms of communication cost and can be used by using a server in consideration of communication response according to the time zone.
[0077]
In addition, since the structure of the facility data and the search index (search menu) of the dedicated server and the car navigation system have a common structure, the dedicated server can perform a quick information search for the search conditions input from the car navigation system.
[0078]
  Here, the present invention is not limited to the above-described embodiment. For example, when searching for ground coordinates of a facility by connecting to a dedicated server, the dedicated server sends the current location information from the car navigation system to the dedicated server. A route search to the ground may be performed. If the Web page corresponding to the Web address searched by the dedicated server does not include facility location information (address, etc.) for the communication search keyword input from the car navigation system, the Web page information is stored in the car navigation system. You may control not to deliver. In general, there are many navigation systems serving as clients with respect to the dedicated server. In this case, the dedicated server 20 determines the data transmission destination and the transmission source of the received data based on the IP address of the navigation device as the client. Identify.
According to the embodiment described above, since the connection to the server device is made when the location information of the destination cannot be found in the local database of the mobile device, the communication cost can be reduced compared to the case where the information is always acquired from the server device. . In addition, it is possible to supply infinite information on the Web page from the server device, and the freshness of the information is higher than that of the fixed destination information as in the conventional CDROM, and the information expansion is excellent. Yes. Further, it is not necessary to purchase a medium such as a CDROM frequently, and it is economical.
In addition, since information about the destination can be obtained from the Web page before or in the process of going to the destination, the freshness is high and wide compared to information fixed like a conventional CDROM or the like. Information can be obtained and is beneficial. In addition, related information is automatically specified and distributed in the process of setting the destination. Further, it is not necessary to purchase a medium such as a CDROM frequently, and it is economical.
Also, the information search index structure or keyword structure is configured the same as the mobile device, and the web page address is linked to this and incorporated in the server device, so that the mobile device can input for local search. The search keyword can be used as it is as a search keyword on the server device side, and it is possible to extract information on a Web page that has high freshness and excellent expandability as a search result.
In addition, since the information on the facilities that can be the destination is automatically updated / expanded on the dedicated server based on the countless latest web page information, it becomes possible to always perform route guidance based on the latest information, In addition, the human labor of the provider operating the dedicated server can also be suppressed.
In addition, since the local database of the navigation device is searched first, and the destination information is received from the database of the dedicated server when the user desires, the communication type must always be connected to the server to obtain the destination information. An unprecedented superior server communication type navigation system that is economical in terms of communication cost compared to a navigation system and that can be used such as using a server in consideration of communication response according to the time zone Can be provided.
[0079]
【The invention's effect】
The present invention searches the address of a Web page including a keyword for specifying a destination from the Internet, associates it with the keyword, stores it in a storage means, and stores the Web page associated with the keyword received from an external mobile device. Since the display information of the Web page indicated by the address or the address of the Web page is returned to the external mobile device that has received the keyword, the server communication type that can use the latest facility database economically A navigation system can be provided.
[Brief description of the drawings]
FIG. 1 is an overall system diagram showing an embodiment of the present invention.
FIG. 2 is a configuration diagram of the car navigation shown in FIG.
FIG. 3 is a configuration diagram of a dedicated server shown in FIG. 1;
FIG. 4 is a link state diagram between a Web search index structure and a Web address database.
FIG. 5 is a link state diagram between a facility database and a Web address database.
FIG. 6 is a front view of a destination search procedure in a car navigation system.
FIG. 7 is a subsequent stage diagram of a destination search procedure in a car navigation system.
FIG. 8 is a flowchart showing a destination search procedure and a Web address information collecting procedure in a dedicated server.
FIG. 9 is a first part of a flowchart showing a procedure for collecting Web address information corresponding to an index structure for Web search.
FIG. 10 is a latter part of a flowchart showing a procedure for collecting Web address information corresponding to an index structure for Web search.
FIG. 11 is a diagram showing a specific example of an address name that can specify a keyword and ground coordinates for each genre.
FIG. 12 is a flowchart showing a procedure for collecting Web address information corresponding to facility data.
FIG. 13 is a diagram showing a link state between a conventional search menu structure and a facility database.
FIG. 14 is a diagram showing a structure of conventional facility data.
[Explanation of symbols]
10 Car navigation system (navigation device)
10a Car navigation system
11 Control means
12 Input means
13 Display means
14 GPS receiver
15 Car navigation storage means
20 Dedicated server
20a Communication device to car navigation system
20b Communication device for internet information
21 Information processing means
22 Dedicated server storage means
23 Web Search Index Structure
24 Web address database
25 Facility database
26 Coordinate database
27, 28, 29 Data link
30 base station
31 Address database
32 Kanji dictionary
40 Telephone network
50 Internet information
51 Search menu structure
52 Data Link
53 Facility Database

Claims (3)

A database pre-stored with keywords specifying the destination;
A web address database in which web page addresses are stored;
When the address of a Web page that includes any of the keywords that specify the destination stored in the database is searched from the Internet, and any of the keywords is included in the Web page, the ground coordinates are Information processing means for determining whether or not an address name that can be specified is included, and determining that the address name is included, associating the address of the Web page with the keyword and storing the address in the Web address database;
Receiving means for receiving a keyword identifying the destination transmitted by an external mobile device;
A reply means for returning the address of the web page associated with the received keyword or the display information of the web page indexed by the address of the web page to the external mobile device that transmitted the keyword;
Equipped with,
The database includes a Web search index having the same structure as the destination search index stored in the mobile device,
The information processing means associates the address of the searched Web page with the Web search index and stores it in the Web address database;
If the keyword received by the receiving means is a search condition input according to the search index, the reply means searches the Web address database with reference to the Web search index structure, and associates the associated keyword The server of the server communication type navigation system , wherein the web page address or the display information of the web page indicated by the web page address is returned to the external mobile device that has transmitted the keyword. apparatus. A coordinate database that stores the coordinate data of the facility linked to the address of the Web page stored in the Web address database and introduced to the Web page indicated by the address of the Web page;
When the keyword is a search condition for the destination, the reply means obtains the coordinate data of the facility linked to the address of the Web page corresponding to the search condition from the coordinate database, and sends it to the external mobile device. Send back,
The server device of the server communication type navigation system according to claim 1. The database is the same as the facility database stored in the mobile body, and includes a facility database having facility data associated with the web page address of the web address database,
If the keyword received by the receiving means is facility data searched by the search condition input according to the search index, the reply means searches the Web address database by referring to the facility database, and associates The address of the received Web page or the display information of the Web page indicated by the address of the Web page is returned to the external mobile device that has transmitted the keyword. Server communication navigation system server device.

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