JP2003065788A - Method for transmitting data and server device in communication navigation system, recording medium, and terminal device for communication navigation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To partially transmit route data and guide data in accordance with the storage capacity of a terminal device for communication navigation. SOLUTION: In a method for transmitting data in a communication navigation system S, route data and guide data are divided into a plurality of pieces, respectively, in accordance with the storage capacity of the terminal device T, these divided route data and guide data are sequentially transmitted from a server device SV to the terminal device T.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transmitting route data, guidance data and map data provided to a navigation terminal device in a communication navigation system, a server device storing those data, a recording medium and those. The present invention relates to a communication navigation terminal device that receives data.

[0002]

2. Description of the Related Art A communication navigation system refers to a map data stored in a map database site via a communication means such as a computer network such as the Internet and a mobile communication network, or a vehicle-mounted navigation device or a portable navigation device. It is transmitted to various navigation terminal devices such as PDAs and mobile phones in response to the request, and the purpose of the user is to use the position detection data by the installed GPS and the map data transmitted from the server device in each navigation terminal device. It refers to a system that performs navigation that guides you to the ground.

Such a communication navigation system has an advantage that it can always refer to the latest map due to its nature. For that purpose, when the map data of the server device is updated, the operation of reloading the map data block and holding the map data in the latest state is required.

In a general sequence of such a communication navigation system, the current position is first displayed on the map using a map cache, and then the destination is searched. In this case, the destination is displayed on a map if necessary. After executing the route search, the route data, the guidance data and the map data are downloaded.

Here, the route data displays roads, the guidance data particularly displays guidance at intersections, and the map data displays a map around the road including the road on which the vehicle travels. Further, the route data and the guidance data are collectively downloaded at the time when the user calculates the route, and the map data are collectively or sequentially downloaded and acquired when necessary.

[0006]

In the conventional communication navigation system as described above, when the route data, the guidance data and the map data are downloaded, if the memory capacity of the communication navigation terminal device is small, the starting point is Since it is impossible to download all the data on the route from to the destination all at once, there is a problem that some data is missing.

Further, when the communication speed of the communication navigation terminal device is low, if the data is downloaded all at once, the waiting time until the start of traveling becomes long, which causes a problem in actual use. When the map data is downloaded and acquired when necessary, it is premised that the terminal device and the server device are always connected.

The present invention has been made in consideration of the above circumstances, and a data transmission method and server in a communication navigation system capable of partially transmitting route data and guidance data according to the storage capacity of a communication navigation terminal device. An object is to provide a device, a recording medium, and a communication navigation terminal device.

[0009]

In order to achieve the above object, a data transmission method in a communication navigation system according to claim 1 uses a communication means for communicating route data, guidance data and map data accumulated in a server device. Communication which is transmitted to the communication navigation terminal device via the communication and performs navigation based on the data displayed on the communication navigation terminal device and position data indicating the current position of the communication navigation terminal device detected by the positioning member. In the navigation system, the route data and the guidance data are divided into a plurality corresponding to the storage capacity of the communication navigation terminal device,
The divided route data and guidance data are sequentially transmitted from the server device to the communication navigation terminal device.

According to the data transmission method in the communication navigation system of the first aspect, the route data and the guidance data are divided into a plurality of parts corresponding to the storage capacity of the communication navigation terminal device, and the divided route data and the guidance data are divided. By sequentially transmitting from the server device to the communication navigation terminal device, the route data and the guidance data can be partially transmitted according to the storage capacity of the communication navigation terminal device. Also, it becomes possible to transmit all route data and guidance data from the departure place to the destination, and it is possible to provide a highly reliable communication navigation system.

According to a second aspect of the present invention, there is provided a data transmission method in a communication navigation system according to the first aspect, wherein the route data and the guidance data are transmitted in response to a request from the communication navigation terminal device.

According to the data transmitting method in the communication navigation system of the second aspect, the route data and the guidance data are transmitted in response to the request of the communication navigation terminal device, so that the server is provided before the route data and the guidance data are lost. Route data and guidance data can be transmitted from the device to the communication navigation terminal device.

According to a third aspect of the present invention, there is provided a method of transmitting data in a communication navigation system according to the first or second aspect, wherein the route data and the guidance data are plural in correspondence with a communication speed between the server device and the communication navigation terminal device. It is characterized by being divided into.

According to the data transmission method in the communication navigation system of the third aspect, the route data and the guidance data are divided into a plurality of numbers corresponding to the communication speeds of the server device and the communication navigation terminal device, so that until the start of traveling. The waiting time can be shortened.

According to a fourth aspect of the present invention, there is provided a data transmission method in a communication navigation system according to the first aspect, wherein a plurality of the route data, the guidance data and the map data are collected and transmitted as blocking data.

According to the data transmission method in the communication navigation system of the fourth aspect, a plurality of route data, guidance data and map data are aggregated and transmitted as blocking data, so that the communication speed is slow,
A communication navigation terminal device that cannot be downloaded at the same time can be used.

The server device in the communication navigation system according to claim 5 transmits the route data, the guidance data and the map data to the communication navigation terminal device through the communication means and displays them on the communication navigation terminal device based on these data. In a communication navigation system that performs a navigation based on the image displayed and the position data indicating the current position of the communication navigation terminal device detected by the positioning member, and can be divided into a plurality according to the storage capacity of the communication navigation terminal device. Data storage means for storing the route data and the guidance data that can be sequentially transmitted is provided.

According to the server device in the communication navigation system of claim 5, the server device can be divided into a plurality of parts corresponding to the storage capacity of the communication navigation terminal device,
Since the route data and the guidance data can be partially transmitted according to the storage capacity of the communication navigation terminal device by providing the data storage means for sequentially storing the route data and the guidance data, the communication navigation terminal Even if the storage capacity of the device is small, it becomes possible to transmit all route data and guidance data from the starting point to the destination.

A recording medium according to a sixth aspect is a computer-readable recording medium in which the route data and the guidance data according to any one of the first to fifth aspects are recorded.

According to the recording medium of the sixth aspect, it is possible to provide a computer-readable recording medium in which the route data and the guidance data according to any one of the first to fifth aspects are recorded.

According to another aspect of the communication navigation terminal device of the present invention, route data, guidance data and map data accumulated in the server device are received via the communication means, and an image displayed based on these data and positioning are performed. In a communication navigation terminal device that performs navigation with position data indicating a current position detected by a member, the route data and the guidance data divided into a plurality to correspond to a storage capacity are sequentially received from the server device and processed. A processing means is provided.

According to the communication navigation terminal device of the seventh aspect, since the communication navigation terminal device is provided with the processing means for sequentially receiving from the server device and processing the route data and the guidance data divided into a plurality to correspond to the storage capacity, Since the route data and the guidance data can be partially received according to the storage capacity, it is possible to receive all the route data and the guidance data from the starting point to the destination even if the storage capacity is small.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings.

In the embodiments described below, a terminal device mounted on a vehicle, a server device connected to the terminal device via a network such as the Internet,
It is an embodiment in the case where the present invention is applied to a navigation system including the network and assisting the movement of a vehicle equipped with a terminal device.

(I) Overall Configuration and Operation First, the overall configuration and operation of the navigation system according to the embodiment will be described with reference to FIGS. 1 to 4.

FIG. 1 is a block diagram showing the configuration of the navigation system according to the embodiment, and FIGS. 2 to 4 are flowcharts showing the navigation processing executed in the navigation system.

As shown in FIG. 1 (a), the communication navigation system S according to the embodiment uses, as a terminal signal St, request information requesting information regarding the current position and traveling direction of the vehicle and information to be presented to the driver. While transmitting to the server device SV via the internet IN, various information for navigation processing transmitted from the server device SV via the internet IN as a communication means in response to the request information is received as a terminal signal St. The terminal device T presented to the driver and the terminal signal S transmitted from the terminal device T via the Internet IN
It will be described later including t as a server signal Ssv, a search process for map information or the like to be presented to the driver on the terminal device T based on the server signal Ssv, a guide route search process for a vehicle equipped with the terminal device T, and the like. A server device SV that performs such a process and transmits the result of the process to the terminal device T as a server signal Ssv via the Internet IN.

It should be noted that one server device SV is shown in FIG.
As shown in (a), it is possible to transmit necessary map information and the like to a plurality of terminal devices T in a time division manner.

Next, the detailed configuration of each component will be described.

First, as shown in FIG. 1B, the server device SV includes a CPU 1, a display unit 2, an input unit 3, an external storage device 4 as a data storage unit including a hard disk device, and an interface. 5 and.

In this configuration, the interface 5 is
Server signal Ssv input from Internet IN
Is executed as a processing server signal Sc to the CPU 1, and when the processing server signal Sc to be transmitted to the terminal device T is transmitted from the CPU 1, the processing is performed. A preset output interface process is executed for the server signal Sc, and the server signal Ssv is output to the terminal device T via the Internet IN.

Next, the external storage device 4 stores map information to be displayed on the terminal device T, various information used for route processing described later, and spot information (more concretely) necessary for executing the navigation processing of the embodiment. Includes the position information of the point shown on the map displayed on the terminal device T, the content information of the point, etc.), and the user information that is information about the user who is using each terminal device T, etc. All the information necessary for the navigation processing executed as the navigation system of the embodiment is accumulated and stored, and these information is stored in the CPU 1 as a memory signal Sm as necessary.
Output to.

On the other hand, the CPU 1 is composed of a map output unit 1a, a route processing unit 1b, and a search unit 1c in terms of its processing.

Then, the map output unit 1a retrieves the map information corresponding to the request information from the map information stored in the external storage device 4, based on the request information input as the processing server signal Sc. Then, it is read out as a memory signal Sm, and this is read out as a processing server signal Sc via the interface 5 and the internet IN.
Output to.

Further, the route processing unit 1b calculates / searches a route along which the vehicle should travel, using the map information stored in the external storage device 4, based on the request information input as the processing server signal Sc. Then, the map information including the searched route is searched and read as the memory signal Sm, and this is output to the terminal device T as the processing server signal Sc via the interface 5 and the Internet IN.

In parallel with this, the route processing section 1b generates route guidance information necessary for guiding the vehicle equipped with the terminal device T so as to move along the searched route. , And outputs the result as a processing server signal Sc to the terminal device T via the interface 5 and the Internet IN.

Further, the search unit 1c determines the processing server signal S
Based on the request information input as c, the spot information or the like stored in the external storage device 4 is searched and read as the memory signal Sm, which is used as the processing server signal Sc via the interface 5 and the Internet IN. Output to the device T.

On the other hand, when the necessary information input processing is executed in the input section 3 corresponding to these processing, the input section 3 generates an input signal Sin corresponding to the information input processing, and this input signal Sin is generated. Output Sin to CPU1. And
The CPU 1 performs a process that matches the content of the input signal Sin.

Information to be presented to the operator of the server device SV when executing these processes is output to the display unit 2 as a display signal Sdp, and the display unit 2 corresponds to the display signal Sdp. Display information.

Next, as shown in FIG. 1 (c), one terminal device T includes a processing unit 10 as a processing unit including a CPU and a necessary memory, a memory 11, and a sensor unit as a positioning member. 12, a display unit 13, a voice output unit 14,
A transmitter / receiver 15 including a mobile phone and the like, and an input unit 16
It consists of and. Here, the memory 11 constitutes a computer-readable recording medium of the present invention in which route data, guidance data and map data are recorded.

In this configuration, the transmitter / receiver 15 executes a preset input interface process on the terminal signal St input from the Internet IN, and outputs it as a processing terminal signal Stt to the processing unit 10. When the processing terminal signal Stt to be transmitted is transmitted from the processing unit 10 to the server device SV, preset output interface processing is executed for the processing terminal signal Stt, and the output terminal processing is performed as the terminal signal St on the Internet. Output to the server device SV via IN.

Next, the sensor unit 12 is specifically, GPS (Global Positioning) launched into the satellite orbit.
System) A GPS receiver that outputs absolute position information (absolute position information indicated by latitude and longitude) of the vehicle on which the terminal device T is mounted based on the position information included in the GPS radio waves transmitted from the satellite. , A vehicle speed sensor that calculates a mileage and a speed of the vehicle based on a so-called vehicle speed pulse transmitted with the rotation of wheels provided in the vehicle, and outputs distance information and speed information, a turning angle of the vehicle, and a vertical direction An acceleration sensor that detects the inclination of the direction and outputs information regarding the traveling direction of the vehicle, and the sensor signal Ssc is information that is output from these sensors and the receiver and that indicates the current position and orientation of the vehicle. Output to the processing unit 10.

On the other hand, the input unit 16 is executed when the input unit 16 executes the designation of the map to be displayed on the display unit 13 or the designation of the navigation process according to the embodiment such as the setting of the destination. The input signal Sin corresponding to the specified designation is generated and output to the processing unit 10.

As a result, the processing unit 10 obtains the current position information indicating the current position of the vehicle on which the terminal device T is mounted based on the sensor signal Ssc and the request information corresponding to the designation executed by the input unit 16. It is generated and these are output to the server device SV via the transmitter / receiver 15 as a processing terminal signal Stt.

Then, when the result corresponding to the processing executed in the server SV based on the output request information and current position information is transmitted as the processing terminal signal Stt via the Internet IN and the transceiver 15. The processing unit 10 displays the map information to be displayed included in the transmitted result as the display signal Sdp on the display unit 13.
To display the necessary map information on the display unit 13. The information displayed on the display unit 13 includes, in addition to the map information, the server device S described above.
The route information based on the map information or route guidance information along the route generated by the route processing unit 1b in V is also included.

Regarding the contents of the route guidance information to be notified to the driver of the vehicle by voice, this is output to the voice output unit 14 as a voice signal Sad, and the route guidance is performed by the required voice output. To perform.

Further, the information to be temporarily stored such as the map information transmitted from the server device SV is output from the processing unit 10 to the memory 11 as the memory signal Sm and temporarily stored. If necessary, it is read again as the memory signal Sm and provided for necessary processing such as display.

Next, the navigation processing executed in the navigation system S having the above-mentioned configuration will be described mainly with reference to the processing executed in the server device SV with reference to FIGS.

First, a map search process for searching a map to be displayed on the display unit 13 on the terminal device T will be described with reference to the flowchart shown in FIG.

In the map search process, first, it is constantly monitored whether or not the request information indicating the map to be displayed is transmitted from the terminal device T (step S1), and when there is no such request information (step S1; (NO) Standby as it is, and when there is the request information (step S1; YE
S) Next, it is authenticated whether the terminal device T that has transmitted the request information is the terminal device T that has been authenticated on the navigation system of the embodiment (step S2).

When the authentication process is completed, next,
The map output unit 1a based on the transmitted request information
In the step S3, the map information stored in the external storage device 4 is searched for the necessary map information.
S4), when the search is completed (step S4; Y
ES), and transmits the searched map information to the terminal device T (step S5).

At this time, during the transmission, it is constantly monitored whether or not all the information has been transmitted (step S6), and if the transmission is not completed (step S6; NO), the transmission is continued as it is, while When the transmission of the necessary map information is completed (step S6; YES), a series of map search processing ends.

Next, the route calculation process for calculating the route for guiding the vehicle equipped with the terminal device T will be described with reference to the flowchart shown in FIG.

In the route calculation process, first, the starting point, the destination and the route condition used for the route calculation (more specifically, whether or not to give priority to an expressway or to pass a specific road without fail) Whether or not the request information including the calculation is transmitted from the terminal device T is constantly monitored (step S20), and when there is no such request information (step S20; NO), it waits as it is, while If there is request information (step S20; YES), then it is authenticated whether the terminal device T that has transmitted the request information is the terminal device T that has been authenticated on the navigation system of the embodiment. (Step S21).

When the authentication process is completed, next,
User information regarding the user who owns the terminal device T that has transmitted the request information is extracted and acquired from the external storage device 4 (step S22), and the destination and the like included in the request information and acquired. Necessary route calculation processing is performed in the route processing unit 1b based on the user information (steps S23 and S24), and when the route calculation processing is completed (step S24; YES), the result is temporarily stored in the CPU 1. And the series of route calculation processing is completed. Regarding the result of the route calculation process,
It is also possible to transmit the result to the terminal device T when the processing is completed and display the result on the display unit 13 or the like.

Further, regarding the route guidance processing for guiding the vehicle equipped with the terminal device T along the calculated route,
This will be described with reference to the flowchart shown in FIG.

In the route guidance processing, first, it is constantly monitored whether or not the request information for requesting the start of the route guidance is transmitted from the terminal device T (step S25), and when there is no such request information (step S25). S25; NO) It stands by as it is, and when there is the request information concerned (step S)
25; YES), and then authenticates whether or not the terminal device T that has transmitted the request information is the terminal device T that has been authenticated on the navigation system of the embodiment (step S26).

When the authentication process is completed, next,
The user information regarding the user who owns the terminal device T that has transmitted the request information is positively extracted and acquired from the external storage device 4 (step S27), and the route processing unit is further associated with the request information. In 1b, necessary route guidance processing is performed (steps S28 and S29), and when the route guidance processing is completed (step S29; YES), a series of route guidance processing ends. The route guidance process includes a process of acquiring current position information indicating the current position of the vehicle from the terminal device T, a process of determining whether the acquired current position is on the previously calculated route, and A process of calculating the relationship between a famous feature on the route that will be advanced in the future (a crossing to turn or a feature to be a target, etc.) and the current position of the vehicle and transmitting the calculated result to the terminal device T so that the driver can recognize it. It is included.

Next, the information retrieval process for retrieving information to be notified to the driver on the terminal device T and related to the navigation process will be described with reference to the flowchart shown in FIG.

In the information retrieval process, first, it is constantly monitored whether or not the request information indicating the information to be notified is transmitted from the terminal device T (step S10), and when the request information is not present (step S10). ; NO) While waiting as it is, when there is the request information (step S1)
0; YES), and then authenticates whether the terminal device T that has transmitted the request information is the terminal device T that has been authenticated on the navigation system of the embodiment (step S11).

When the authentication process is completed, next,
Based on the transmitted request information, the search unit 1c searches for necessary information for the information stored in the external storage device 4 (steps S12 and S13),
When the search is completed (step S13; YE
S), and transmits the searched information to the terminal device T (step S14).

At this time, during the transmission, it is constantly monitored whether or not all the information to be transmitted has been transmitted (step S
15) If the transmission is not completed (step S1)
5; NO) The transmission is continued as it is, and when the transmission of the necessary map information is completed (step S15; YE).
S), a series of information retrieval processing is ended.

(II) Route data, guidance data and ground
Partial distribution of diagram data [Configuration] The external storage device 4 of the server device SV can be divided into a plurality of parts in accordance with the storage capacity of the memory 11 of the terminal device T and the communication speed between the server device SV and the terminal device T. Thus, route data, guidance data and map data that can be sequentially transmitted are stored. A plurality of these route data, guidance data, and map data are collected and transmitted as blocking data from the server device SV to the terminal device T in response to a request from the user of the terminal device T.

That is, the route data, the guidance data, and the map data stored in the external storage device 4 are collectively collected as necessary data so that the terminal device T can be acquired and transmitted as blocking data. It

Therefore, in the data transmission method in the communication navigation system of the present embodiment, the route data, the guidance data and the map data stored in the external storage device 4 are stored in plural numbers corresponding to the storage capacity of the memory 11 of the terminal device T. The route data, the guidance data and the map data thus divided are sequentially transmitted from the server device SV to the terminal device T.

[Operation] FIG. 5 is an explanatory view showing a partial distribution form of data in the present embodiment, FIG. 6 is a view showing a partial distribution process of data in FIG. 5, and FIG. 7 is a partial distribution process of data in FIG. FIG. 5 is an explanatory diagram showing the data acquisition timing of

As shown in FIGS. 5 and 6, when traveling from a starting point (starting point) to a destination, at a data download point (hereinafter, simply referred to as a load point) DP1 at the starting point, the user goes through the terminal device T. Then, a signal indicating the request for route calculation is transmitted to the server device SV (step P1 in FIG. 6). Then, the divided route data string, guidance data string G1, and map data group M1 are downloaded as blocking data from the server device SV to the terminal device T (step P2). The user uses the route data sequence, the guidance data sequence G1 and the map data group M.
Based on 1, the vehicle travels according to the displayed road image, the guidance image at the intersection, and the surrounding map image including the traveling road.

Then, the load point DP2 (point A)
Then, the guidance data string G1 and the map data group M1 downloaded at the load point DP1 are stored in the terminal device T.
The user requests these data because the memory 11 has not been deleted (step P3). Then, the guide data string G2 and the map data group M2 that have been divided again are downloaded from the server device SV to the terminal device T (step P4). Then, the user travels according to the images displayed based on the guidance data string G2 and the map data group M2.

Furthermore, the load point DP3 (point B)
Then, the guidance data string G2 and the map data group M2 downloaded at the load point DP2 are stored in the terminal device T.
Since the memory 11 has not yet been erased, the user requests these data (step P5). Then, the map data group M3 to the destination divided into the terminal devices T is downloaded from the server device SV (step P
6). The user travels to the destination according to the surrounding map image including the traveling road displayed based on the map data group M3.

As for the data acquisition timing for the server SV, the data (route data string, guidance data string and map data group) guided by the user is used up as shown in FIG. 7 (reaching the intermediate point). Before, it requests the next data from the server device SV.

Therefore, the processing unit 10 of the terminal device T
The route data sequence, the guidance data sequence, and the map data group divided into a plurality to correspond to the storage capacity of the memory 11 are sequentially received from the server device SV and processed.

[Effect] As described above, according to the data transmission method of the present embodiment, the route data, the guidance data, and the map data are divided into a plurality of portions corresponding to the storage capacity of the terminal device T, and the divided route data are stored. By sequentially transmitting the guidance data and the map data from the server device SV to the terminal device T, the route data, the guidance data, and the map data can be partially transmitted according to the storage capacity of the terminal device T. Even if the storage capacity of T is small, it is possible to transmit all route data, guidance data, and map data from the starting point to the destination, and it is possible to provide a highly reliable communication navigation system.

Further, according to the data transmission method of the present embodiment, the route data, the guidance data and the map data are transmitted in response to the request from the terminal device T, so that the route data, the guidance data and the map data are not lost. These data can be transmitted from the server device SV to the terminal device T.

Further, according to the data transmission method of this embodiment, the route data, the guidance data, and the map data are divided into a plurality of numbers corresponding to the communication speeds of the server device SV and the terminal device T, so that the start of travel can be achieved. The waiting time can be shortened.

According to the data transmission method of this embodiment, a plurality of route data, guidance data and map data are collected and transmitted as blocking data, so that the communication speed is slow and a plurality of threads are used. A terminal device T that cannot be downloaded at the same time can handle this.

According to the server device SV in the present embodiment, the route data, the guidance data and the map data which can be divided into a plurality of numbers corresponding to the storage capacity of the terminal device T and which can be sequentially transmitted to the terminal device T are accumulated. By providing the external storage device 4 for storing the route data, the guidance data and the map data according to the storage capacity of the terminal device T, it is possible to partially transmit the route data, the guidance data and the map data. It becomes possible to transmit all data from the ground to the destination.

Further, according to the terminal device T in the present embodiment, the processing unit 10 for sequentially receiving and processing the route data, the guidance data and the map data, which are divided into a plurality to correspond to the storage capacity, from the server device SV. Since it is possible to partially receive route data, guidance data and map data according to the storage capacity, it is possible to receive all data from the starting point to the destination even if the storage capacity is small. It will be possible.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above embodiment, the internet IN is used as the communication means, but the present invention is not limited to this, and a communication network using a dedicated line or a public line may be used.

In the above embodiment, the communication navigation terminal is used as the terminal device T.
It may be A, a mobile phone, a general-purpose personal computer, various mobile terminals with a communication function, a home electric appliance with a communication function, or the like. Although the terminal device T is mounted on the vehicle, a portable device is also applicable.

Further, in FIG. 5 and FIG. 6, the route data from the starting point to the destination is collectively downloaded from the server device SV in step P2, but the present invention is not limited to this, and is sequentially downloaded at each data download point. You may do it. The data to be downloaded during the route guidance are the guidance data and the map data. However, since guidance is possible if only the guidance data exists, the guidance data is preferentially downloaded.

Therefore, according to the present invention, at least the route data sequence and the guidance data sequence may be divided into a plurality of pieces and transmitted sequentially from the server SV to the terminal T.

[0082]

As described above, according to the data transmission method in the communication navigation system of the present invention, it becomes possible to partially transmit the route data and the guidance data according to the storage capacity of the communication navigation terminal device. Therefore, even if the storage capacity of the communication navigation terminal device is small, it is possible to transmit all route data and guidance data from the starting point to the destination, and it is possible to provide a highly reliable communication navigation system.

Further, according to the server device in the communication navigation system according to the present invention, it is possible to partially transmit the route data and the guidance data according to the storage capacity of the communication navigation terminal device. Even if the storage capacity is small, it is possible to transmit all route data and guidance data from the starting point to the destination.

Further, according to the communication navigation terminal device of the present invention, it is possible to partially receive the route data and the guidance data according to the storage capacity. Therefore, even if the storage capacity is small, from the starting point to the destination. It becomes possible to receive all the route data and the guidance data of.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a navigation system of an embodiment, (a) is a block diagram showing an overall configuration of the navigation system, and (b) is a block diagram showing a detailed configuration of a server device. , (C) are block diagrams showing a detailed configuration of the terminal device.

FIG. 2 is a flowchart showing a map search process according to the embodiment.

FIG. 3 is a flow chart showing a route process according to the embodiment, (a) is a flow chart showing a route calculation process according to the embodiment, and (b) is a flow chart showing a route guiding process according to the embodiment.

FIG. 4 is a flowchart showing an information search process according to the embodiment.

FIG. 5 is an explanatory diagram showing a partial distribution form of data according to the present embodiment.

FIG. 6 is a diagram showing a partial distribution process of the data in FIG.

FIG. 7 is an explanatory diagram showing a data acquisition timing of a partial data distribution process in FIG.

[Explanation of symbols]

1 ... CPU 1a ... Map output section 1b ... Path processing unit 1c ... Search section 2, 13 ... Display 3, 16 ... Input section 4 ... External storage device (data storage means) 5 ... Interface 10 ... Processing unit (processing means) 11 ... Memory (recording medium) 12 ... Sensor unit (positioning member) 14 ... Voice output section 15 ... Transceiver S ... Navigation system SV ... Server device T ... Terminal device IN: Internet (communication means) St ... Terminal signal Ssv ... server signal Sc ... Processing server signal Sm ... Memory signal Sin ... input signal Sdp ... Display signal Stt ... Processing terminal signal Ssc ... Sensor signal Sad ... voice signal DP1 to DP3 ... Data download points G1, G2 ... Guidance data string M1 to M3 ... Map data group

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Claims (7)

[Claims] 1. An image displayed on the communication navigation terminal device by transmitting route data, guidance data and map data accumulated in a server device to the communication navigation terminal device through a communication means, and based on these data. In a communication navigation system that performs navigation by using position data indicating the current position of the communication navigation terminal device detected by the positioning member, the route data and the guidance data are divided into a plurality of pieces corresponding to the storage capacity of the communication navigation terminal device. Then, the divided route data and the guidance data are sequentially transmitted from the server device to the communication navigation terminal device. 2. The data transmission method according to claim 1, wherein the route data and the guidance data are transmitted in response to a request from the communication navigation terminal device. 3. The communication navigation system according to claim 1, wherein the route data and the guidance data are divided into a plurality of pieces corresponding to a communication speed between the server device and the communication navigation terminal device. Data transmission method in. 4. The data transmission method in a communication navigation system according to claim 1, wherein a plurality of the route data, the guidance data and the map data are aggregated and transmitted as blocking data. 5. The route data, the guidance data, and the map data are transmitted to the communication navigation terminal device via the communication means, and based on these data, the image displayed on the communication navigation terminal device and the communication detected by the positioning member. In a communication navigation system that performs navigation with position data indicating the current position of the navigation terminal device, the route data and the guidance data that can be divided into a plurality of numbers corresponding to the storage capacity of the communication navigation terminal device and that can be sequentially transmitted. A server device in a communication navigation system, comprising: a data storage means for storing the data. 6. A computer-readable recording medium on which the route data and the guidance data according to claim 1 are recorded. 7. The route data, the guidance data and the map data accumulated in the server device are received via the communication means, and the image displayed based on these data and the current position detected by the positioning member are shown. In a communication navigation terminal device that performs navigation by using position data, the communication navigation terminal device includes a processing unit that sequentially receives and processes the route data and the guidance data divided into a plurality to correspond to a storage capacity from the server device. Communication navigation terminal device.