JP7129457B2 - Information processing system and information processing device - Google Patents

Description

The present invention relates to an information processing system and an information processing device.

2. Description of the Related Art Conventionally, a navigation device or the like mounted on a vehicle or the like has been known. A navigation device searches for a route based on a destination or the like input by a user, and uses the searched route to provide route guidance to the destination.

Further, in the navigation device, by transmitting information such as the destination input by the user to the server device, route guidance to the destination can be performed using the route searched by the server device.

Furthermore, after determining whether or not the route searched by the navigation device and the route searched by the server device match, information on the route searched by the server device is used for the inconsistent part. A technique for performing route guidance is known (see Patent Document 1, for example).

Japanese Patent No. 4036012

Here, the navigation device provides route guidance to the destination using, for example, guidance information (for example, images of road signs, voice guidance to the destination, etc.).

However, in the conventional technology described above, for example, when image data and audio data of all guidance information used for route guidance are acquired from a server device, the amount of communication between the navigation device and the server device may increase. .

An embodiment of the present invention has been made in view of the above points, and an object thereof is to reduce the amount of communication in route guidance.

To achieve the above object, one embodiment of the present invention is an information processing system in which a server device and an information processing device are communicably connected, wherein the server device connects node information and the node information. a network data storage unit for storing network data including link information; means for searching for a route based on search conditions based on the network data; and guidance information within a predetermined range from the searched route. means for acquiring a guide information ID from a first guide information storage unit; means for transmitting the searched route and the acquired guide information ID to the information processing device; and differential guidance transmitted from the information processing device. said information processing apparatus comprising: means for receiving an information ID; and means for acquiring difference guide information corresponding to the received difference guide information ID from said first guide information storage unit and transmitting said information to said information processing apparatus. stores guidance information, which is older than the first guidance information storage unit and is audio data or image data used for route guidance, in association with a guidance information ID for identifying the guidance information; means for receiving the ID of the route and the guide information transmitted from the server device; and the second guide information storage unit based on the received ID of the guide information. a means for specifying a guide information ID of guide information not stored in a storage unit as a difference guide information ID; and transmitting the specified difference guide information ID to the server device to correspond to the difference guide information ID sent from the server device. and means for providing route guidance using the route, the guidance information stored in the second guidance information storage unit, and the difference guidance information based on the received difference guidance information ID. have

An object of one embodiment of the present invention is to reduce the amount of communication in route guidance.

1 is a diagram showing an example system configuration of a route guidance system according to a first embodiment; FIG. It is a figure explaining the outline|summary of the process of the route guidance system which concerns on 1st embodiment. It is a figure which shows the hardware constitutions of an example of the electronic device and server apparatus which concern on 1st embodiment. 1 is a diagram showing an example functional configuration of a route guidance system according to a first embodiment; FIG. It is a figure which shows an example of the guidance information matched with permanent ID. FIG. 7 is a sequence diagram of an example of route guidance start processing according to the first embodiment; It is a figure explaining an example of route guidance. It is a figure which shows an example functional structure of the route guidance system which concerns on 2nd embodiment. FIG. 4 is a diagram showing an example of node information and link information associated with permanent IDs; FIG. 11 is a sequence diagram of an example of route guidance start processing according to the second embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
First, the system configuration of the route guidance system 1 according to this embodiment will be described with reference to FIG. FIG. 1 is a diagram showing an example system configuration of a route guidance system 1 according to this embodiment.

As shown in FIG. 1, a route guidance system 1 according to this embodiment includes an electronic device 10 and a server device 20, which are communicably connected via a wide-area network N such as the Internet.

The electronic device 10 is, for example, a navigation device (so-called car navigation system) mounted on a vehicle or the like. Note that the route guidance system 1 may have a plurality of electronic devices 10 .

A client program 100 is installed in the electronic device 10 . Electronic device 10 also includes map data storage unit 110 , network data storage unit 120 , and guidance information storage unit 130 .

The electronic device 10 uses the client program 100 to request the server device 20 to search for a route from the current location to the destination based on, for example, the destination and waypoints input by the user. Further, the electronic device 10 searches for a route from the current location to the destination based on the destination, waypoints, etc. input by the user and the network data stored in the network data storage unit 120, for example.

Then, the electronic device 10 uses the client program 100 to display the route searched by the server device 20 or the route searched by the electronic device 10 on the map indicated by the map data stored in the map data storage unit 110. to provide route guidance. At this time, the electronic device 10 performs route guidance using at least one of the guidance information stored in the guidance information storage unit 130 and the guidance information acquired from the server device 20 . Accordingly, the electronic device 10 can provide route guidance to the user.

Thus, the electronic device 10 can request the server device 20 to search for a route, and the electronic device 10 can also search for a route.

The map data is data for displaying a map on the electronic device 10. For example, the map data is classified by type of display object such as green areas, rivers, roads, railroads, prefectures, etc. It is divided into a known mesh and managed. The map data classified for each type of display target is displayed by drawing each mesh on a layer predetermined for each type according to the scale. Therefore, the client program 100 displays a map on the electronic device 10 by, for example, combining and superimposing one or more mesh-like layers on which map data classified by type of display target is drawn. do.

Network data is data used for route search, etc. For example, node information indicating various points such as intersections, branch points, locations where road attributes change, locations where road width changes, etc., and information between nodes. Link information to connect is included. The node information includes, for example, the node number, latitude/longitude, the name of the intersection (in kanji and pronunciation), the presence or absence of a traffic light, and the like. Further, the link information includes information such as link length, coordinate point sequence, link cost, node numbers at both ends of the link, road attributes, direction of travel, altitude (elevation), and the like. Therefore, the client program 100 uses a known algorithm such as Dijkstra's algorithm to search for a route so that the link cost from the current location to the destination is minimized.

Guidance information is data such as images and voices used for route guidance, and includes, for example, image data such as road signs and voice data for voice guidance. A permanent ID, which is identification information for identifying the guidance information, is associated with the guidance information.

The server device 20 is a computer that searches for a route in response to a request from the electronic device 10 . Note that the server device 20 may be realized by one or more computers.

A server program 200 is installed in the server device 20 . Server device 20 also includes map data storage unit 210 , network data storage unit 220 , and guidance information storage unit 230 .

The server device 20 uses the server program 200 to, in response to a request from the electronic device 10 , determine the current location based on the current location, the destination, etc. included in the request and the network data stored in the network data storage unit 220 . Search for a route from to the destination. Note that the server program 200, like the client program 100, uses a known algorithm such as Dijkstra's algorithm to search for a route so that the link cost from the current location to the destination is minimized.

Then, the server device 20 uses the server program 200 to return to the electronic device 10 the route information indicating the searched route and the permanent ID of the guidance information used for route guidance of the route. As a result, the electronic device 10 acquires from the server device 20 guidance information that is not stored in the guidance information storage unit 230 of the electronic device 10, among the guidance information identified by the permanent ID returned from the server device 20. can do.

In addition to the route information and the permanent ID, the server device 20 may reply to the electronic device 10 with the map data corresponding to the searched route among the map data stored in the map data storage unit 210 .

In this way, the server device 20 can search for routes in response to requests from the electronic device 10 . In addition, the server device 20 can reply to the electronic device 10 with the permanent ID of the guidance information used for route guidance of the searched route.

Here, the map data, network data, and guidance information are updated by the vendors of the client program 100 and the server program 200, for example, when new roads and intersections are laid. Network data and guide information are distributed.

In this embodiment, it is assumed that the latest guidance information is stored in the guidance information storage unit 230 of the server device 20 . On the other hand, it is assumed that the latest guidance information is not necessarily stored in the guidance information storage unit 130 of the electronic device 10 .

Similarly, in this embodiment, it is assumed that the latest network data is stored in the network data storage unit 220 of the server device 20 . On the other hand, it is assumed that the network data storage unit 120 of the electronic device 10 does not always store the latest network data.

The user of the electronic device 10 can update the network data, the map data, and the guide information to the latest state by using recording media such as CDs, DVDs, and USB memories distributed by vendors, for example.

<Overview of processing>
Next, an outline of processing of the route guidance system 1 according to this embodiment will be described with reference to FIG. FIG. 2 is a diagram explaining an outline of processing of the route guidance system 1 according to the first embodiment.

S1) First, the electronic device 10 transmits to the server device 20 a route search request including, for example, the destination and waypoints input by the user.

S2) Next, when the server device 20 receives the route search request from the electronic device 10, it searches for a route to the destination based on the destination and waypoints included in the route search request. The server device 20 also acquires the permanent ID of the guidance information corresponding to the searched route. The guidance information corresponding to the route is guidance information used for route guidance of the route (that is, for example, image data of road signs on the route, voice data of voice guidance to the destination, etc.). be.

S3) Next, the server device 20 transmits the route information indicating the searched route and the permanent ID to the electronic device 10 .

S4) Subsequently, the electronic device 10 identifies, among the permanent IDs received from the server device 20, permanent IDs that are not associated with guidance information stored in the guidance information storage unit . That is, the electronic device 10 identifies the permanent ID of the guidance information that is not stored in the guidance information storage unit 130 among the guidance information identified by the permanent ID received from the server device 20 . Henceforth, the permanent ID specified in this way is represented as "difference permanent ID."

S5) Subsequently, the electronic device 10 transmits the differential permanent ID identified in S4 above to the server device 20 .

S6) Upon receiving the difference permanent ID, the server device 20 acquires guidance information associated with the difference permanent ID (hereinafter referred to as “difference guidance information”) from the guidance information storage unit 230 .

S7) Next, the server device 20 transmits the guidance information acquired in S6 above to the electronic device 10 .

S8) Then, the electronic device 10 combines the difference guidance information received from the server device 20 in S7 above with the guidance information stored in the guidance information storage unit 130 in association with the permanent ID received in S4 above. Based on this, route guidance is provided for the route indicated by the route information.

That is, the electronic device 10 provides route guidance for the route 1000 based on the difference guidance information 2100 received from the server device 20 and the guidance information 2200 and guidance information 2300 stored in the guidance information storage unit 130, for example. .

As described above, in the route guidance system 1 according to the present embodiment, among the guidance information used for route guidance, guidance information (difference guidance information) that is not stored in the guidance information storage unit 130 of the electronic device 10 is stored in the server device 20 . Get from On the other hand, in the route guidance system 1 according to the present embodiment, among the guidance information used for route guidance, the guidance information stored in the guidance information storage unit 130 of the electronic device 10 is acquired from the guidance information storage unit 130. do.

As a result, in the route guidance system 1 according to this embodiment, it is possible to reduce the amount of data communication in route guidance between the electronic device 10 and the server device 20 .

<Hardware configuration>
Next, hardware configurations of the electronic device 10 and the server device 20 included in the route guidance system 1 according to this embodiment will be described with reference to FIG. FIG. 3 is a diagram showing an example hardware configuration of the electronic device 10 and the server device 20 according to the first embodiment.

<<electronic device 10>>
As shown in FIG. 3A, the electronic device 10 according to this embodiment has an input device 11, a display device 12, an external I/F 13, and a communication I/F . Further, the electronic device 10 according to the present embodiment includes a ROM (Read Only Memory) 15, a RAM (Random Access Memory) 16, a CPU (Central Processing Unit) 17, a storage device 18, and a GPS (Global Positioning System). a receiver 19; Furthermore, these pieces of hardware are connected to each other by a bus B1.

The input device 11 is, for example, a touch panel, various buttons, etc., and is used by the user to perform various inputs to the electronic device 10 . The display device 12 is, for example, an LCD (Liquid Crystal Display) or the like, and displays the results of processing by the electronic device 10 .

The external I/F 13 is an interface with an external device. The external device includes a recording medium 13a and the like. The electronic device 10 can read from and write to the recording medium 13 a via the external I/F 13 .

The recording medium 13a includes, for example, a CD, a DVD, an SD memory card, a USB memory, and the like. Note that the client program 100 may be stored in the recording medium 13a.

Communication I/F 14 is an interface for connecting electronic device 10 to network N. FIG. The electronic device 10 can perform data communication with the server device 20 via the communication I/F 14 .

The storage device 18 is a non-volatile memory that stores programs and data, such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive). The programs and data stored in the storage device 18 include a client program 100 and an OS (Operating System), which is basic software for controlling the electronic device 10 as a whole.

The RAM 16 is a volatile semiconductor memory that temporarily holds programs and data. The ROM 15 is a non-volatile semiconductor memory that can retain programs and data even when power is turned off. The ROM 15 stores, for example, data such as OS settings and network settings.

The CPU 17 is an arithmetic unit that reads programs and data from the ROM 15, storage device 18, etc. onto the RAM 16 and executes processing based on the programs and data, thereby realizing control of the entire electronic device 10 and various functions.

The GPS receiver 19 receives predetermined radio waves from GPS and measures the latitude and longitude indicating the current position of the electronic device 10 . Note that the GPS receiver 19 may be able to measure the altitude of the electronic device 10 .

The electronic device 10 according to the present embodiment has the hardware configuration shown in FIG.

<<Server Device 20>>
As shown in FIG. 3B, the server device 20 according to this embodiment has an input device 21, a display device 22, an external I/F 23, and a communication I/F 24. The server device 20 according to this embodiment also has a ROM 25 , a RAM 26 , a CPU 27 and a storage device 28 . Furthermore, these hardware are connected to each other by a bus B2.

The input device 21 is, for example, a keyboard, mouse, touch panel, various buttons, etc., and is used by the user to perform various inputs to the server device 20 . The display device 22 is, for example, an LCD, a CRT (Cathode Ray Tube), or the like, and displays the results of processing by the server device 20 . At least one of the input device 21 and the display device 22 may be used by connecting to the bus B2 when necessary.

The external I/F 23 is an interface with an external device. The external device includes a recording medium 23a and the like. The server device 20 can read from and write to the recording medium 23 a via the external I/F 23 .

The recording medium 23a includes, for example, a CD, a DVD, an SD memory card, a USB memory, and the like. Note that the server program 200 may be stored in the recording medium 23a.

Communication I/F 24 is an interface for connecting server device 20 to network N. FIG. The server device 20 can perform data communication with the electronic device 10 via the communication I/F 24 .

The storage device 28 is a non-volatile memory that stores programs and data, such as an HDD or SSD. The programs and data stored in the storage device 28 include the server program 200 and the OS, which is basic software for controlling the server device 20 as a whole.

A RAM 26 is a volatile semiconductor memory that temporarily holds programs and data. The ROM 25 is a non-volatile semiconductor memory that can retain programs and data even when the power is turned off. The ROM 25 stores, for example, data such as OS settings and network settings.

The CPU 27 is an arithmetic unit that reads programs and data from the ROM 25, the storage device 28, etc. onto the RAM 26 and executes processing based on the programs and data, thereby controlling the entire server device 20 and realizing various functions.

The server device 20 according to the present embodiment has the hardware configuration shown in FIG.

<Functional configuration>
Next, the functional configuration of the route guidance system 1 according to this embodiment will be described with reference to FIG. FIG. 4 is a diagram showing an example functional configuration of the route guidance system 1 according to the first embodiment.

As shown in FIG. 4 , the electronic apparatus 10 according to the present embodiment includes, as main functional units, a communication unit 101, an input reception unit 102, a display control unit 103, a condition setting unit 104, and a route search unit 105. , a difference identification unit 106 , and a route guidance unit 107 . Each of these functional units is implemented by processing that the client program 100 causes the CPU 17 to execute.

The communication unit 101 transmits and receives various data to and from the server device 20 . For example, the communication unit 101 transmits a route search request including search conditions set by the condition setting unit 104 (to be described later) to the server device 20 . Also, for example, the communication unit 101 receives the route information and the permanent ID from the server device 20 . Further, for example, the communication unit 101 transmits to the server device 20 a difference permanent ID specified by the difference specifying unit 106, which will be described later.

The input reception unit 102 receives various inputs from the user. For example, the input receiving unit 102 receives inputs such as a destination and waypoints from the user.

The display control unit 103 displays various screens. For example, the display control unit 103 displays a map based on map data stored in the map data storage unit 110 on the display device 12 . Further, for example, the display control unit 103 displays the route indicated by the route information received from the server device 20 on the map. Furthermore, the display control unit 103 displays guidance information on the display device 12 . In addition to these, the display control unit 103, for example, displays various information (for example, facility information, notes, etc.) on a map, displays various screens (for example, setting screens for destinations and waypoints, and displays various settings). screen, etc.).

The condition setting unit 104 sets search conditions including various conditions for route search. That is, the condition setting unit 104 includes, for example, the destination received by the input receiving unit 102, the current location measured by the GPS receiver 19 (that is, latitude and longitude information indicating the current location of the electronic device 10), and the like. Set search conditions. Then, the condition setting unit 104 transmits a route search request including search conditions to the server device 20 through the communication unit 101 .

Note that the search condition may include, for example, a waypoint accepted by the input accepting unit 102 . The search condition may also include, for example, the presence or absence of passage on a toll road. Thus, the search conditions include various conditions used for route search from the current location to the destination.

The route search unit 105 performs route search based on the search conditions set by the condition setting unit 104 and network data stored in the network data storage unit 120 .

Note that in the route guidance system 1 according to the present embodiment, the electronic device 10 transmits a route search request including search conditions to the server device 20 as described above. Therefore, the electronic device 10 does not necessarily need to perform a route search using the route search unit 105 . However, for example, when the communication state between the electronic device 10 and the server device 20 is bad, or when it is desired to search for a route immediately, the electronic device 10 transmits a route search request to the server device 20, A route search may be performed by the route search unit 105 .

The difference identification unit 106 determines the difference (difference permanent ID ). That is, the difference identification unit 106 identifies, among the permanent IDs received from the server device 20, permanent IDs other than the permanent IDs associated with the guidance information stored in the guidance information storage unit 130 as difference permanent IDs. do.

Then, the difference identification unit 106 transmits the difference permanent ID to the server device 20 through the communication unit 101 .

The route guidance unit 107 provides route guidance for the route indicated by the route information received from the server device 20 . At this time, the route guidance unit 107 uses the difference guidance information received from the server device 20 and/or the guidance information acquired from the guidance information storage unit 130 to provide route guidance for the route.

It should be noted that the route guidance is to guide the user of the electronic device 10 to the destination according to the route. The route guidance also includes, for example, guidance when the current location of the electronic device 10 deviates from the route (guidance for returning to the original route, route re-search, etc.).

As shown in FIG. 4, the server device 20 according to this embodiment has a communication unit 201, a route search unit 202, and an acquisition unit 203 as main functional units. Each of these functional units is implemented by processing that the server program 200 causes the CPU 27 to execute.

The communication unit 201 transmits and receives various data to and from the electronic device 10 . For example, the communication unit 201 receives a route search request from the electronic device 10 . Also, for example, the communication unit 201 transmits to the electronic device 10 route information indicating a route searched by the route search unit 202 described below and a permanent ID acquired by the acquisition unit 203 described below. Furthermore, the communication unit 201 transmits guidance information acquired by the acquisition unit 203 described later to the electronic device 10 .

The route search unit 202 performs a route search based on search conditions included in the route search request received from the electronic device 10 and network data stored in the network data storage unit 220 . Then, the route search unit 202 transmits, through the communication unit 201, route information indicating the searched route and a permanent ID acquired by the acquisition unit 203, which will be described later, to the electronic device 10. FIG.

The acquisition unit 203 acquires from the guidance information storage unit 230 the permanent ID associated with the guidance information corresponding to the route searched by the route search unit 202 . Further, the obtaining unit 203 obtains guidance information (difference guidance information) associated with the difference permanent ID received from the electronic device 10 from the guidance information storage unit 230 .

Guidance information is stored in the guidance information storage unit 130 of the electronic device 10 and the guidance information storage unit 230 of the server device 20 in association with the permanent ID. FIG. 5 is a diagram showing an example of guidance information associated with a permanent ID.

FIG. 5A shows an example of guidance information stored in the guidance information storage unit 130. FIG. As shown in FIG. 5A, guidance information is stored in the guidance information storage unit 130 in association with permanent IDs. Here, the guidance information has content and coordinates as data items.

The content is data indicating an image displayed as guidance information, a voice reproduced as guidance information, and the like. That is, the content is set with, for example, image data, audio data, or a file path indicating the storage location of these data.

Coordinates are information indicating latitude and longitude for which guidance information is used. For example, when the current location of the electronic device 10 enters a predetermined range from the latitude and longitude indicated by the coordinates, the guidance information displays image data or the like indicated by the content (or reproduces audio data). will be done.).

FIG. 5B shows an example of guidance information stored in the guidance information storage unit 230. As shown in FIG. As shown in FIG. 5B, guidance information is stored in the guidance information storage unit 230 in association with permanent IDs.

Here, as described above, while the guidance information storage unit 230 stores the latest guidance information, the guidance information storage unit 130 does not always store the latest guidance information. Therefore, the guidance information storage unit 230 stores guidance information such as permanent IDs "P001", "P002", "P003", and "P004", while the guidance information storage unit 130 stores: Guidance information for the permanent ID "P002" is not stored.

<Details of processing>
Next, details of processing of the route guidance system 1 according to the present embodiment will be described. Thereafter, route information indicating a route searched by the server device 20 is transmitted to the electronic device 10, and route guidance for the route is performed using guidance information stored in the electronic device 10 and/or the server device 20. will be described with reference to FIG. FIG. 6 is a sequence diagram of an example of route guidance start processing according to the first embodiment.

In step S601, the condition setting unit 104 of the electronic device 10 sets search conditions. That is, the condition setting unit 104 sets search conditions including, for example, the destination received by the input receiving unit 102 and the current location measured by the GPS receiver 19 . Note that the user can input a destination and the like on a screen (search condition setting screen) displayed by the display control unit 103, for example.

In step S<b>602 , the condition setting unit 104 of the electronic device 10 transmits a route search request including the search conditions set in step S<b>601 to the server device 20 through the communication unit 101 .

In step S<b>603 , when the route search request is received by the communication unit 201 , the route search unit 202 of the server device 20 combines the search conditions included in the route search request with the network data stored in the network data storage unit 220 . Route search is performed based on That is, the route search unit 202 searches for the optimum route from the current location to the destination based on the current location and the destination included in the search conditions, for example.

In step S604, the acquisition unit 203 of the server device 20 acquires from the guidance information storage unit 230 the permanent ID of the guidance information corresponding to the route searched in step S603. That is, the acquiring unit 203 acquires, for example, a permanent map in which the coordinates of the guidance information stored in the guidance information storage unit 230 are associated with guidance information within a predetermined range from the route searched in step S603. Get an ID.

In step S605, the route search unit 202 of the server device 20 transmits route information indicating the route searched in step S603 and the permanent ID acquired by the acquisition unit 203 in step S604 to the electronic device 10. do.

The route information is information including, for example, node information of nodes included in the route and link information of links included in the route. However, the route information may be, for example, coordinate point sequence information indicating latitude and longitude at predetermined intervals on the route. Further, the route information is, for example, information for searching for the same route by the route search unit 105 of the electronic device 10 (information indicating the starting point and destination on the route, information indicating each point on the route, etc.). can be

In step S606, the difference identification unit 106 of the electronic device 10 determines the difference (permanent difference) between the permanent ID received from the server device 20 and the permanent ID associated with the guidance information stored in the guidance information storage unit 130. ID). That is, the difference identification unit 106 identifies, among the permanent IDs received from the server device 20, permanent IDs other than the permanent IDs associated with the guidance information stored in the guidance information storage unit 130 as difference permanent IDs. do.

Specifically, for example, while the permanent IDs received from the server apparatus 20 are "P001", "P002", "P003", and "P007", guidance information for the permanent ID "P002" and permanent ID "P007" ” is not stored in the guidance information storage unit 130 . In this case, the difference identification unit 106 identifies the difference permanent IDs as "P002" and "P007."

In step S<b>607 , the difference identification unit 106 of the electronic device 10 transmits the difference permanent ID to the server device 20 through the communication unit 101 .

In step S<b>608 , when the communication unit 101 receives the difference permanent ID, the acquisition unit 203 of the server device 20 acquires guidance information (difference guidance information) associated with the difference permanent ID from the guidance information storage unit 230 . .

In step S<b>609 , the acquisition unit 203 of the server device 20 transmits the difference guidance information acquired in step S<b>608 to the electronic device 10 via the communication unit 201 .

In step S610, the route guidance unit 107 of the electronic device 10 selects the permanent ID associated with the guidance information stored in the guidance information storage unit 130, among the permanent IDs received from the server device 20 in step S606. to get guidance information.

In this way, the electronic device 10 acquires from the guidance information storage unit 130 guidance information associated with permanent IDs other than the difference permanent ID among the permanent IDs received from the server device 20 . At this time, the electronic device 10 updates the guide information storage unit 130 by storing the difference permanent ID and the difference guide information received from the server device 20 in the guide information storage unit 130 in association with each other. good.

In step S611, the route guidance unit 107 of the electronic device 10 uses the difference guidance information received from the server device 20 and the guidance information acquired in step S610 to determine the route indicated by the route information received in step S605. route guidance is provided.

For example, when the route information is coordinate point sequence information, the route guidance unit 107 displays the route on the map by connecting each coordinate point sequence indicated by the coordinate point sequence information with straight lines or curves. good. Further, for example, when the route information is information indicating the starting point and destination on the route searched by the server device 20 and information indicating each point on the route, the route guidance unit 107 The searching unit 105 searches for a route from these pieces of information, and then displays the searched route on the map.

Here, an example of route guidance by the route guidance unit 107 of the electronic device 10 is shown in FIG. FIG. 7 is a diagram illustrating an example of route guidance.

As shown in FIG. 7 , the electronic device 10 causes the display control unit 103 to display a route guidance screen G100 on the display device 12 . A route 3000, difference guidance information 4100, guidance information 4200, and guidance information 4300 are displayed on the route guidance screen G100. In this manner, the route guidance screen G100 can provide route guidance along the route 3000 by displaying the difference guidance information 4100 indicating road signs and the like, the guidance information 4200, the guidance information 4300, and the like.

Further, as shown in FIG. 7 , the electronic device 10 can provide route guidance along the route 3000 by outputting difference guidance information 4400 as voice guidance from the route guidance unit 107 . Note that voice guidance based on the difference guidance information 4400 can be provided by, for example, an in-vehicle speaker or the like connected to the electronic device 10 .

As a result, the user of the electronic device 10 can refer to the difference guidance information 4100, the guidance information 4200, and the guidance information 4300 displayed on the route guidance screen G100, the difference guidance information 4400 outputted as voice, and the like, and follow the route 3000 to the destination. You will be able to reach the ground.

As described above, in the route guidance system 1 according to the present embodiment, among the guidance information used for route guidance of the route searched by the server device 20, guidance information (difference guidance information) that is not stored in the electronic device 10 is obtained from the server device 20 . On the other hand, in the route guidance system 1 according to the present embodiment, among the guidance information used for route guidance of the route searched by the server device 20, the guidance information stored in the electronic device 10 is not acquired from the server device 20. .

Therefore, in the route guidance system 1 according to the present embodiment, it is possible to reduce the amount of communication between the electronic device 10 and the server device 20 when acquiring guidance information used for route guidance.

[Second embodiment]
Next, a second embodiment will be described. In the first embodiment, the guidance information is associated with the permanent ID. In the second embodiment, the node information and the link information included in the network data are associated with the permanent ID. A case will be described.

Thus, in the second embodiment, the network data storage unit 120 of the electronic device 10 can be updated based on the route searched by the server device 20. FIG. Hereinafter, a permanent ID associated with node information will be referred to as a "node ID", and a permanent ID associated with link information will be referred to as a "link ID".

In the second embodiment, portions having the same functions and performing the same processing as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

<Functional configuration>
Next, the functional configuration of the route guidance system 1 according to this embodiment will be described with reference to FIG. FIG. 8 is a diagram showing an example functional configuration of the route guidance system 1 according to the second embodiment.

As shown in FIG. 8, the electronic device 10 according to this embodiment has an updating unit 108 . The functional unit is realized by processing that the client program 100 causes the CPU 17 to execute. Also, the electronic device 10 according to the present embodiment differs from the first embodiment in the function of the difference identification unit 106A.

The difference identification unit 106A obtains the permanent ID (node ID and link ID) transmitted from the server device 20 in response to the route search request, and the node information and link information included in the network data stored in the network data storage unit 120. A difference (difference permanent ID) from the permanent ID (node ID and link ID) associated with is specified.

That is, the difference specifying unit 106A determines the difference (difference node ID ). Further, the difference specifying unit 106A determines the difference (difference link ID ).

Then, the difference specifying unit 106</b>A transmits the difference permanent ID (difference node ID and difference link ID) to the server device 20 through the communication unit 101 .

The update unit 108 updates the network data storage unit 120 using node information and link information acquired by the acquisition unit 203A, which will be described later.

As shown in FIG. 8, the server device 20 according to this embodiment differs from the first embodiment in the function of an acquisition unit 203A.

The acquisition unit 203A acquires from the network data storage unit 220 the permanent IDs (node ID and link ID) of the node information and link information corresponding to the route searched by the route search unit 202 . That is, the acquiring unit 203A acquires from the network data storage unit 220 the node ID of the node information indicating the node included in the route searched by the route searching unit 202 and the link ID of the link information indicating the link included in the route. get.

The acquisition unit 203A also acquires from the network data storage unit 220 node information (differential node information) associated with the differential node ID received from the electronic device 10 . Furthermore, the obtaining unit 203A obtains link information (differential link information) associated with the differential link ID received from the electronic device 10 from the network data storage unit 220 .

As described above, node information and link information are stored in the network data storage unit 120 of the electronic device 10 and the network data storage unit 220 of the server device 20 in association with the permanent ID. FIG. 9 is a diagram showing an example of node information and link information associated with permanent IDs.

9A shows an example of node information included in network data stored in the network data storage unit 120. FIG. As shown in FIG. 9A, the network data storage unit 120 stores node information in association with node IDs. Here, the node information has the node number, latitude/longitude, etc. as data items, as described above.

FIG. 9B shows an example of link information included in network data stored in the network data storage unit 120. As shown in FIG. As shown in FIG. 9B, the network data storage unit 120 stores link information in association with link IDs. Here, the link information has, as data items, link length, coordinate point sequence, node number (start point, end point), road attribute, direction of travel, etc., as described above.

FIG. 9C shows an example of node information included in network data stored in the network data storage unit 220. FIG. As shown in FIG. 9C, the network data storage unit 220 stores node information in association with node IDs.

FIG. 9D shows an example of link information included in network data stored in the network data storage unit 220. FIG. As shown in FIG. 9C, the network data storage unit 220 stores link information in association with link IDs.

Here, as described above, while the network data storage unit 220 stores the latest network data, the network data storage unit 120 does not necessarily store the latest network data. Therefore, for example, the network data storage unit 220 stores the link information with the link ID “P002”, while the network data storage unit 120 does not store the link information with the link ID “P002”.

<Details of processing>
Next, details of processing of the route guidance system 1 according to the present embodiment will be described. Hereinafter, processing for updating network data stored in the electronic device 10 when route information indicating a route searched by the server device 20 is transmitted to the electronic device 10 to start route guidance will be described with reference to FIG. Description will be made with reference to this. FIG. 10 is a sequence diagram of an example of route guidance start processing according to the second embodiment.

In step S1001, the acquisition unit 203A of the server device 20 acquires from the network data storage unit 220 the permanent IDs (node ID and link ID) of the node information and link information corresponding to the route searched in step S603.

In step S1002, the route searching unit 202 of the server device 20 acquires the route information indicating the route searched in step S603 and the permanent ID (node ID and link ID) acquired by the acquiring unit 203A in step S1001. Send to electronic device 10 .

In step S1003, the difference identification unit 106A of the electronic device 10 determines the permanent ID (node ID and link ID) received from the server device 20 and the permanent ID associated with the network data stored in the network data storage unit 120. Identify the difference from the ID (difference permanent ID).

That is, the difference identification unit 106A identifies, among the node IDs received from the server device 20, node IDs other than the node IDs associated with the node information stored in the network data storage unit 120 as difference node IDs. do. Similarly, the difference identification unit 106A uses link IDs other than the link IDs associated with the link information stored in the network data storage unit 120 among the link IDs received from the server device 20 as difference link IDs. Identify.

Then, the difference identification unit 106A sets the difference node ID and the difference link ID as the difference permanent ID.

In step S<b>1004 , the difference identification unit 106</b>A of the electronic device 10 transmits the difference permanent ID to the server device 20 through the communication unit 101 .

In step S1005, when the communication unit 201 receives the difference permanent ID, the obtaining unit 203A of the server device 20 obtains network data associated with the difference permanent ID from the network data storage unit 220. FIG.

That is, the acquiring unit 203A acquires node information (differential node information) associated with the differential node ID from the network data storage unit 220. FIG. Similarly, the acquiring unit 203A acquires link information (differential link information) associated with the differential link ID from the network data storage unit 220. FIG.

In step S<b>1006 , the acquisition unit 203</b>A of the server device 20 transmits the differential node information and differential link information acquired in step S<b>1005 to the electronic device 10 via the communication unit 201 .

In step S<b>1007 , the update unit 108 of the electronic device 10 updates the network data storage unit 120 using the differential node information and differential link information received by the communication unit 101 . That is, the update unit 108 stores the difference node information in the network data storage unit 120 in association with the difference node ID. Similarly, the update unit 108 associates the difference link information with the difference link ID and stores the difference link information in the network data storage unit 120 . Thereby, the network data storage unit 120 is updated.

In step S<b>1008 , the route guidance unit 107 of the electronic device 10 performs route guidance for the route indicated by the route information received from the server device 20 . At this time, the route guidance unit 107 performs route guidance using guidance information and/or differential guidance information, as described in the first embodiment.

For example, when the route information is coordinate point sequence information, the route guidance unit 107 may perform the process of step S1008 before the process of step S1003. That is, in this case, the processes of steps S1003 to S1007 may be performed in the background of route guidance by the route guidance unit 107. FIG.

As described above, in the route guidance system 1 according to the present embodiment, among the node information and link information corresponding to the route searched by the server device 20, node information and link information that are not stored in the electronic device 10 are Additional updates to the electronic device 10 can be made. As a result, in the route guidance system 1 according to the present embodiment, the user does not need to manually update the network data storage unit 120 of the electronic device 10 using a recording medium such as a CD, DVD, or USB memory. .

It should be noted that the present invention is not limited to the specifically disclosed embodiments above, but is capable of various modifications and alterations without departing from the scope of the claims.

1 route guidance system 10 electronic device 20 server device 100 client program 101 communication unit 102 input reception unit 103 display control unit 104 condition setting unit 105 route search unit 106 difference identification unit 107 route guidance unit 110 map data storage unit 120 network data storage unit 130 guidance information storage unit 200 server program 201 communication unit 202 route search unit 203 acquisition unit 210 map data storage unit 220 network data storage unit 230 guidance information storage unit

Claims (2)

An information processing system in which a server device and an information processing device are communicably connected,
The server device
a network data storage unit for storing network data including node information and link information connecting the node information;
A first guidance information storage section provided separately from the network data storage section, in which guidance information, which is voice data or image data used for route guidance, is associated with a guidance information ID that identifies the guidance information. a first guidance information storage unit that stores a first guidance information table that is stored as a first guidance information table with the latest update date and time ;
means for performing a route search based on search conditions based on the network data;
means for obtaining from the first guide information table a guide information ID of guide information within a predetermined range from the searched route;
means for transmitting coordinate point string information indicating latitude and longitude of the searched route at predetermined intervals and the acquired guide information ID to the information processing device;
means for receiving a difference guide information ID transmitted from the information processing apparatus;
means for acquiring difference guidance information corresponding to the received difference guidance information ID from the first guidance information table and transmitting the difference guidance information to the information processing apparatus;
The information processing device is
a second guide information table having an update date and time older than the first guide information table stored in the first guide information storage unit, the guide information being voice data or image data used for route guidance ; a second guidance information storage unit that stores a second guidance information table in which a guidance information ID that identifies the guidance information is associated and stored;
means for receiving the coordinate point sequence information and the ID of the guide information transmitted from the server device;
means for specifying a guide information ID of guide information not stored in the second guide information table as a difference guide information ID based on the ID of the received guide information;
means for transmitting the identified difference guidance information ID to the server device and receiving difference guidance information corresponding to the difference guidance information ID transmitted from the server device;
means for performing route guidance using the coordinate point sequence information, the guidance information stored in the second guidance information table , and the difference guidance information based on the received difference guidance information ID;
The means for performing route guidance for the information processing device includes:
An information processing system that displays a route by connecting each coordinate point sequence indicated by the coordinate point sequence information with a straight line or a curved line. A network data storage unit for storing network data including node information and link information connecting the node information; and a first guidance information storage unit provided separately from the network data storage unit, and used for route guidance. a first guide information storage unit storing a first guide information table in which guide information, which is voice data or image data, is stored in association with a guide information ID for identifying the guide information, and has the latest update date and time ; means for performing a route search based on the search conditions based on the network data; and means for acquiring from the first guide information table the guide information ID of the guide information within a predetermined range from the searched route. means for transmitting coordinate point string information indicating the latitude and longitude of the searched route at predetermined intervals and the acquired guidance information ID to an information processing device; and differential guidance information transmitted from the information processing device. communicably connected to a server device having means for receiving an ID and means for acquiring guide information corresponding to the received difference guide information ID from the first guide information table and transmitting the guide information to the information processing device; The information processing device,
a second guide information table having an update date and time older than the first guide information table stored in the first guide information storage unit, the guide information being voice data or image data used for route guidance ; a second guidance information storage unit that stores a second guidance information table that stores a guidance information ID that identifies the guidance information;
means for receiving the coordinate point sequence information and the ID of the guide information transmitted from the server device;
means for specifying a guide information ID of guide information not stored in the second guide information table as a difference guide information ID based on the ID of the received guide information;
means for transmitting the identified difference guidance information ID to the server device and receiving difference guidance information corresponding to the difference guidance information ID transmitted from the server device;
means for performing route guidance using the coordinate point sequence information, the guidance information stored in the second guidance information table , and the guidance information based on the received differential guidance information ID;
The means for performing route guidance for the information processing device includes:
An information processing device that displays a route by connecting each coordinate point sequence indicated by the coordinate point sequence information with a straight line or a curved line.

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