JP2003042773A - Communication navigation system, server apparatus, terminal apparatus, and data structure in navigation information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication navigation system that can improve the versatility of information that is sent and received, and at the same time that can cope with a situation when specifications are changed in a server apparatus or a terminal apparatus by changing only a portion corresponding to the change. SOLUTION: With the data structure of information that is transmitted and received in a communication navigation system including the server apparatus and the terminal apparatus, the package P as the unit of information is composed of a data code DC for indicating the attribute of a data body DB that is the information itself, size information DS for indicating the amount of information of the package P including the data body DB, and the data body DB regarding all types of pieces of information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a communication navigation system, a server device, a terminal device, and a data structure of navigation information, and more specifically, it is connected to a terminal device via a network such as the Internet. A communication navigation system that includes a server device that is installed in the vehicle and the terminal device that is installed in the vehicle, and a server device and a terminal device that are included in the communication navigation system, and are exchanged within the communication navigation system. It belongs to the technical field of data structure of navigation information.

[0002]

2. Description of the Related Art In recent years, a network system for connecting a server device and a terminal device (personal computer) via a network to exchange various information has become widespread.

In the above-mentioned current network system, each server device stores and stores information to be transmitted to each terminal device, or even within one server device, for each attribute of information to be transmitted. The data format in the transmission may be different.

On the other hand, in recent years, in a navigation system which performs a navigation process for assisting the movement of a vehicle to a desired destination, as the navigation process such as accumulation of map information, retrieval of the accumulated map and route retrieval. Research and development on a so-called communication navigation system, in which main processing is collectively performed in a fixedly installed server device and only the result is transmitted to a terminal device connected via a network for navigation processing, is actively conducted. Has been done.

At this time, if the above-mentioned communication navigation system is constructed on the premise of the conventional network system, it is necessary for the navigation processing in a different mode depending on each server device storing map information or each attribute of information to be transmitted. The transmission mode of various navigation information will be defined.

[0006]

However, when different transmission modes are used for each server device or each information attribute as described above, the navigation processing is performed by using the terminal device that does not correspond to the transmission mode. If this is done, the navigation information to be received cannot be received by the terminal device, resulting in a problem that the necessary navigation processing is not executed.

In this case, particularly when the navigation information desired in the terminal device does not exist in the server device, the server device provides the terminal device with information indicating that the navigation information does not exist in the transmission mode used in the server device. When the terminal device does not support the transmission mode used by the server device, the terminal device recognizes that the information of the requested content is transmitted from the server device. Therefore, the terminal device falls into an unexpected error state (navigation processing cannot be executed).

Further, when different transmission modes are used for transmission of navigation information for each server device or each attribute of information, the specification is changed only in a part of the server device or the terminal device. Even in such a case, it may be necessary to review all the specifications of the communication navigation system as a whole, and as a result, the widespread use of the communication navigation system may be hindered.

Therefore, the present invention has been made in view of the above problems, and the problem is that the versatility of navigation information exchanged in a communication navigation system can be improved and a server device or a terminal is provided. Even if a specification change occurs in a device, a communication navigation system capable of continuing navigation processing by changing only a portion corresponding to the change, a server device and a terminal device included in the communication navigation system, and the communication navigation system It is to provide a data structure of navigation information exchanged in the inside.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 is a terminal for receiving navigation information transmitted from a server device via a network while moving with a moving body. And a server device that transmits the navigation information to the terminal device via the network,
A data structure of the navigation information transmitted in a communication navigation system that performs a navigation process for assisting the movement of the mobile body using the navigation information, wherein all types of the navigation information are first stored in the terminal device. The attribute information such as a data code indicating the attribute of the navigation information body of the navigation information body that is recognized and used in the navigation process in the terminal device and the attribute information in the terminal device that is recognized subsequently to the navigation information. The size information indicating the amount of information included in the transmission unit in the transmission and the navigation information body such as the data body recognized after the size information in the terminal device constitute the transmission unit.

Therefore, for all types of navigation information, one transmission unit is constituted by the attribute information, size information, and navigation information body, and further navigation information to be transmitted is constituted by one or a plurality of transmission units. By transmitting all types of navigation information in the same transmission mode, the versatility of the navigation information can be improved.

Further, even if the specification is changed in the server device or the terminal device, the navigation process can be continued by changing only the part corresponding to the change.

In order to solve the above-mentioned problems, the invention according to claim 2 provides the data structure according to claim 1,
The navigation information body is error information indicating that it is impossible to transmit the navigation information required for the terminal device from the server device, and the attribute information is provided by the navigation information body. It is configured to have a content indicating that

Therefore, even if the navigation information to be used in the terminal device cannot be provided from the server device side, the fact can be recognized in the terminal device in the same manner as the other navigation information, so that the desired navigation information is not transmitted. In this case, it is possible to prevent malfunction of the terminal device.

In order to solve the above-mentioned problems, the invention according to claim 3 is the data structure according to claim 1 or 2, wherein information transmitted from the server device to the terminal device as the navigation information body. Is at least one of map information used for the navigation processing, point information used for displaying points in the navigation processing, or route information indicating a route that the moving body should move in the navigation processing. Is configured as follows.

Therefore, at least one of the map information, the point information, and the route information is transmitted as the navigation information body in the same manner as the other types of navigation information. It can be recognized by the terminal device and used for navigation processing.

In order to solve the above-mentioned problems, the invention according to claim 4 is the server device included in the communication navigation system according to any one of claims 1 to 3, wherein the terminal device is provided. The navigation information body, the size information, and the attribute information to be transmitted to the transmission unit, a constituent unit such as a CPU that configures the transmission unit, and the configured one or more transmission units. Information, the size information, and the navigation information body are sequentially generated with respect to the terminal device corresponding to the generation means, such as a CPU, which generates the navigation information in such a manner that the navigation information is recognized by the terminal device. And an output unit such as an interface for outputting.

Therefore, for all types of navigation information, one transmission unit is composed of the attribute information, the size information, and the navigation information body, and the attribute information, size information, and navigation information body are further composed of one or a plurality of transmission units. Since the navigation information is configured in such a manner that it is recognized by the terminal device in order, it is possible to enhance the versatility of the navigation information by transmitting all types of navigation information in the same transmission manner.

Further, even if the specification is changed in the server device, the navigation processing can be continued by changing only the portion corresponding to the change.

In order to solve the above-mentioned problems, the invention according to claim 5 is the terminal device included in the communication navigation system according to any one of claims 1 to 3, wherein the navigation information is Is transmitted, the attribute information based on the extraction means such as a processing unit that extracts the attribute information and the size information from the transmission unit in the navigation information, and the extracted attribute information and size information. And a recognition unit such as a processing unit that recognizes the content of the navigation information body included in the transmission unit that included size information, and a process that executes the corresponding navigation process based on the recognized content. And an execution unit such as a section.

Therefore, for all types of navigation information, one transmission unit is composed of the attribute information, the size information, and the navigation information body, and the attribute information, size information, and navigation information body are further composed of one or a plurality of transmission units. Since the navigation information is configured in such a manner that it is recognized by the terminal device in order, the versatility of the navigation information can be improved by transmitting / receiving all types of navigation information in the same transmission manner.

Further, even when the specification is changed in the terminal device, the navigation process can be continued by changing only the part corresponding to the change.

In order to solve the above-mentioned problems, the invention according to claim 6 is the terminal device according to claim 5, wherein the execution means is configured to execute the server when the navigation information body is the error information. The terminal device is configured to warn that the necessary navigation information cannot be obtained from the device.

Therefore, when the navigation information to be used in the terminal device cannot be provided from the server device side, the terminal device recognizes that fact and warns in the same manner as other navigation information, so that the desired navigation information is transmitted. The user of the terminal device can immediately recognize that the navigation process cannot be executed due to the lack of power, and the terminal device can continue to execute other navigation processes.

In order to solve the above problems, the invention according to claim 7 is the server device according to claim 4, and
Or the terminal device according to item 6.

Therefore, for all types of navigation information, one transmission unit is composed of the attribute information, size information, and navigation information body, and further navigation information to be transmitted is composed of one or a plurality of transmission units. By transmitting all types of navigation information in the same transmission mode, the versatility of the navigation information can be improved.

Further, even if a specification change occurs in the communication navigation system, the navigation process can be continued by changing only the part corresponding to the change.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred embodiments of the present invention will be described 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 that includes the network and assists 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. 1A, the navigation system S according to the embodiment uses the terminal signal St as request information requesting information regarding the current position and traveling direction of the vehicle and information to be presented to the driver. IN
To the server device SV via the Internet, and at the same time, various information for navigation processing transmitted from the server device SV via the Internet IN corresponding to the request information is received as a terminal signal St and presented to the driver. Map information to be received by the terminal device T and the terminal signal St transmitted from the terminal device T via the Internet IN as the server signal Ssv and presented to the driver on the terminal device T based on the server signal Ssv. And a server device SV for transmitting the result of the process as a server signal Ssv to the terminal device T via the Internet IN by performing a process as described later including a search process for a vehicle equipped with the terminal device T and a guide route search process for a vehicle equipped with the terminal device T. ,.

Note 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 as a constituent means and a generation means, a display unit 2, an input unit 3, and an external storage device 4 including a hard disk device or the like. , An interface 5 as an output means,
It is composed by.

In this configuration, the interface 5 is
Server signal Ssv input from Internet IN
When a processing server signal Sc to be transmitted to the terminal device T is transmitted from the CPU 1 while executing a preset input interface processing to the CPU 1 as a processing server signal Sc and outputting the processing server signal Sc to the CPU 1. 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 information necessary for the navigation processing executed as the navigation system of the embodiment is accumulated and stored, and the information is output to the CPU 1 as a memory signal Sm as necessary.

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 as a memory signal Sm and is output to the terminal device T as a processing server signal Sc via the interface 5 and the Internet IN.

Further, the route processing section 1b calculates / searches a route along which the vehicle should travel by 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 unit 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 retrieval unit 1c retrieves the spot information or the like stored in the external storage device 4 based on the request information input as the processing server signal Sc, reads it as the memory signal Sm, and processes it. The server signal Sc is output to the terminal device T via the interface 5 and the Internet IN.

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 outputs it to the CPU 1. To do. Then, the CPU 1 performs a process matching 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 outputs information corresponding to the display signal Sdp. Is displayed.

Next, as shown in FIG. 1 (c), one terminal device T has a processing unit 10 as an extracting means, an executing means and a recognizing means, which comprises a CPU and a necessary memory, and a memory 11.
, Sensor unit 12, display unit 13, and voice output unit 14
And a transmitter / receiver 15 such as a mobile phone, and an input unit 1
6 and.

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 to the processing unit 10 as a processed terminal signal Stt. When the processing terminal signal Stt to be transmitted to the server device SV is transmitted from the processing unit 10, the preset output interface processing is executed for the processing terminal signal Stt, and the Internet I is used as the terminal signal St.
Output to the server device SV via N.

Next, the sensor unit 12 is, specifically, a GPS (Global Positioning) launched into a satellite orbit.
System) A GPS receiver that outputs absolute position information (absolute position information indicated by latitude and longitude) of a vehicle on which the terminal device T is mounted based on position information included in GPS radio waves transmitted from a 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 of the vehicle, and outputs distance information and speed information; An acceleration sensor that detects the inclination of the direction and outputs information about 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 performs a navigation process related to the embodiment such as designation of a map to be displayed on the display unit 13 or setting of a 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 treated as the processing terminal signal Stt via the transmitter / receiver 15 and the server device S
Output to V.

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 outputs the map information to be displayed included in the transmitted result to the display unit 15 as the display signal Sdp, and causes the display unit 15 to display the necessary map information. The information displayed on the display unit 15 includes, in addition to the map information, the server device SV described above.
It also includes the route information according to the map information or the route guidance information along the route generated by the route processing unit 1b.

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, regarding the information that should be temporarily stored, such as the map information transmitted from the server device SV,
After being output as a memory signal Sm from the processing unit 10 to the memory 11 and temporarily stored, it is read out again as a memory signal Sm as necessary and provided for necessary processing such as display.

Next, the navigation processing executed in the navigation system S having the above-mentioned structure will be described mainly with reference to FIGS. 2 to 4, mainly the processing executed in the server device SV.

First, a map search process for searching a map to be displayed on the display unit 15 on the terminal device T will be described with reference to the flowchart shown in FIG.

In the map search processing, 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 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 S of the embodiment (step S).
2).

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). In the transmission process, the packaging process for forming the processing server signal Sc to be transmitted is executed in a manner described later (see FIG. 6).

Then, during the transmission, it is constantly monitored whether or not all the information has been transmitted (step S6), and when the transmission is not completed (step S6; NO), the transmission is continued as it is, and on the other hand, it is necessary. When the transmission of various map information is completed (step S6; YES), a series of map search processing is ended.

Next, a route calculation process for calculating a route for guiding a 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 S).
20; NO), and when there is such request information (step S20; YES), the terminal device T that has transmitted the request information is authenticated on the navigation system S of the embodiment. It is authenticated whether or not it is the terminal device T (step S21).

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 extracted and acquired from the external storage device 4 (step S22), and the destination and the like included in the request information are 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 C
The result is stored in the memory in PU1, and then the stored calculation processing result is transmitted to the terminal device T (step S25). In the transmission process, step S in FIG.
Similar to the processing of 5, the packaging processing for forming the processing server signal Sc to be transmitted has a mode as described later (FIG. 6).
).

Then, during the transmission, it is constantly monitored whether or not all the information has been transmitted (step S26), and when the transmission is not completed (step S26; NO), the transmission is continued as it is, while necessary. When the transmission of various map information is completed (step S26; YES), a series of route calculation processing is ended.

The route calculation result transmitted to the terminal device T is displayed on the display unit 15 or the like.

Next, the route guidance processing for guiding the vehicle equipped with the terminal device T along the calculated route will be described with reference to the flowchart shown in FIG. 3 (b).

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 S30). If there is no such request information (step S30). ; NO) It stands by as it is, and when there is the request information (step S3)
0; YES), and then authenticates whether the terminal device T that has transmitted the request information is the authenticated terminal device T on the navigation system S of the embodiment (step S31).

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 positively extracted and acquired from the external storage device 4 (step S32), and the route processing unit is further associated with the request information. In 1b, necessary route guidance processing is performed (steps S33 and S34), and when the route guidance processing is completed (step S34; YES), a series of route guidance processing ends.

Note that the terminal device T is used for the route guidance processing.
Process of acquiring the current position information indicating the current position of the vehicle from the process of determining whether the acquired current position is on the previously calculated route, and a well-known feature on the future route It includes a process of calculating the relationship between the current position of the vehicle and a desired intersection or a target intersection) and transmitting the calculated result to the terminal device T so that the driver can recognize the relationship. At this time, when transmitting information to the terminal device T, a packaging process (see FIG. 6) as described later for forming the processing server signal Sc to be transmitted, which is similar to step S5 in FIG. 2, is executed. It will be.

Next, the information retrieval process for retrieving the information to be notified to the driver and related to the navigation process on the terminal device T 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 there is no such request information (step S10; NO) Waits as it is, and when there is the request information (step S1)
0; YES), and then authenticates whether or not the terminal device T that has transmitted the request information is the authenticated terminal device T on the navigation system S 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). Note that, in the transmission process, the packaging process for forming the processing server signal Sc to be transmitted is executed in a manner described later (see FIG. 6), similar to the process of step S5 in FIG.

During the transmission, it is constantly monitored whether or not all the information to be transmitted has been transmitted (step S1).
5) If the transmission is not completed (step S15;
NO) The transmission is continued as it is. On the other hand, when the transmission of the necessary map information is completed (step S15; YES), a series of information search processing is ended.

(II) Embodiment of Packaging Process Next, the above-mentioned step S5 (see FIG. 2) and step S
25 (see FIG. 3A), step S33 (FIG. 3B)
Information) and the information packaging process according to the embodiment, which are executed in step S14 (see FIG. 4), respectively, will be described with reference to FIGS.

Note that FIG. 5A is a flow chart showing a packaging process performed in the server device SV when transmitting information from the server device SV, and FIG.
FIG. 6B is a flowchart showing a process executed by the terminal device T when the packaged transmitted information is received by the terminal device T, and FIG. 6 is a physical diagram of the packaged information. It is a figure which shows a different format.

In the packaging process executed in the server device SV, as shown in FIG.
First, the information to be transmitted to the terminal device T is searched and acquired in the external storage device 4 or the like (step S40),
The acquired information is packaged in the manner shown in the lower part of FIG. 6 (step S41).

Here, the mode of the packaging process will be specifically described with reference to the lower part of FIG.

The mode shown in the lower part of FIG. 6 is a package mode commonly used for all information exchanged between the server device SV and the terminal device T.

That is, in the packaging process, the data code DC indicating the attribute (type) of the information that follows in the package P is arranged at the beginning of one package P, and the data code DC follows the data code DC. In addition, size information DS indicating the information amount of the entire package P including it is arranged. Then, following the size information DS, a header H indicating that the content of the information transmitted to the terminal device T is started and a data body DB which is the information itself are arranged.

More specifically, more specifically, map information to be displayed on the terminal device T (in addition to information indicating the map itself, point information indicating a famous feature or the like, or guiding a vehicle equipped with the terminal device T). (Including route information indicating a route to be performed and information for guiding the route) is transmitted as the data body DB, the data code DC in the package P
A data code DC indicating that the map information is transmitted is arranged as the. Further, when the error information indicating that the desired information in the terminal device T could not be acquired in the server device SV is transmitted as the data body DB, the data code DC in the package P is the error information. A data code (error code) DC indicating that data is transmitted is arranged.

Returning to the flowchart of FIG. 5A, when the packaging process of the information to be transmitted by the process of step S41 is completed in the manner shown in the lower part of FIG. 6, then, as shown in the upper part of FIG. The navigation data D to be transmitted to the terminal device T is formed by the package P thus created (step S42).

Here, more specifically, regarding the structure of the navigation data D, a plurality of packages P of the navigation data D are denoted by reference numerals P1, P2, ..., Pn-1 and Pn in the upper part of FIG. The navigation data D are formed by being arranged as shown. Then, a final package E indicating that the navigation data D is completed is added to the end of all the packages P to be transmitted in one transmission. At this time, specifically, the final package E includes only the data code DC in which information indicating the final package E is described.

In the navigation data D,
When it is necessary to show that information is being received on the terminal device T by a bar graph (so-called progress bar),
A package P for that purpose (hereinafter, appropriately referred to as a data size package) is newly formed. Then, the data size package includes the information amount of the entire information for which the transmission state is displayed by the bar graph as the data body DB, and further, the information amount of the entire information for which the data size package should display the transmission state. Indicating package P
The data code DC indicating that Then, the data size package having the above configuration is arranged and transmitted as the first package P in the navigation data D.

Navigation data D in the form shown in FIG.
Is formed (step S42), the navigation data D is transmitted to the terminal device T via the interface 5 as the processing server signal Sc (step S43).

Next, the reception processing in the terminal device T which receives the navigation data D transmitted in the mode shown in FIG. 6 will be described using the flowchart shown in FIG. 5 (b).

As shown in FIG. 5B, the terminal device T to which the navigation data D has been transmitted first receives the navigation data D (step S
50), and the data code D in each package P
C is acquired (step S51). Then, the attribute of the data body DB that follows it is judged from the content of the acquired data code DC to acquire it (step S5).
2) Perform necessary navigation processing (display of map information or route guidance) using the acquired data body (step S53). Then, in consideration of the case where a plurality of navigation data D are transmitted, it is confirmed whether or not all the navigation data D have been transmitted (step S54), and other navigation data D are continuously transmitted. When it comes (step S54; NO)
Returning to step S51, the series of processes described above is performed on the other navigation data D, and when the transmission of all the navigation data D is completed (step S54; YES), the process is directly terminated. .

In the receiving process shown in FIG. 5B, when it is recognized that the received package P includes the data main body DB as the error information (step S51), a message to that effect is given, for example. The information is displayed on the display unit 13 to notify the driver.

As described above, according to the operation of the communication navigation system S of the embodiment, for all types of navigation data D, the data code DC, the size information DS, the header H, and the data body DB form one package. P, and one or more packages P
Since the navigation data D to be transmitted is constituted by the above, the versatility of the navigation data D can be improved by transmitting all kinds of navigation data D in the same transmission mode.

Further, even if the specification is changed as the server device SV, the terminal device T or the communication navigation system S, the navigation process can be continued by changing only the contents of the package P corresponding to the change.

Further, even when the information to be used in the terminal device T cannot be provided from the server device SV side, that fact is treated as error information in the same manner as other information, and the terminal device T is treated as error information.
Therefore, it is possible to prevent malfunction of the terminal device T when desired information is not transmitted.

Furthermore, map information as a data body DB,
Since at least one of the point information and the route information is transmitted in the same manner as the other types of information, any type of information can be recognized by the terminal device T and used for navigation processing. it can.

In the above embodiment, the terminal device T
Although the case of using the one mounted on the vehicle has been described, the terminal device T may be a mobile phone or a mobile personal computer capable of displaying a map or the like.

[0090]

As described above, according to the invention described in claim 1, for all types of navigation information, one transmission unit is constituted by the attribute information, the size information, and the navigation information body. Since the navigation information to be transmitted is composed of one or a plurality of transmission units, the versatility of the navigation information can be increased by transmitting all types of navigation information in the same transmission mode.

Therefore, by increasing the versatility of the transmitted navigation information, it is possible to enhance the versatility of the communication navigation system as a whole and promote the spread of the communication navigation system.

Further, even if a specification change occurs in the server device, the terminal device or the communication navigation system, the navigation process can be continued by changing only the part corresponding to the change.

According to the invention of claim 2, claim 1
In addition to the effect of the invention described in (1), even when the navigation information to be used in the terminal device cannot be provided from the server device side, that fact can be recognized in the terminal device in the same manner as other navigation information. It is possible to prevent the occurrence of malfunction in the terminal device when no data is transmitted.

According to the invention of claim 3, claim 1
Alternatively, in addition to the effect of the invention described in 2, since at least one of map information, point information, or route information is transmitted as the navigation information body in the same manner as other types of navigation information, any type of navigation Even information can be recognized by the terminal device and provided for navigation processing.

According to the invention described in claim 4, for all types of navigation information, one transmission unit is constituted by the attribute information, the size information, and the navigation information body, and the attribute is constituted by one or a plurality of transmission units. Since the navigation information is configured in such a manner that the terminal device recognizes the information, the size information, and the navigation information main body in this order, the versatility of the navigation information is enhanced by transmitting all types of navigation information in the same transmission mode. be able to.

Therefore, by increasing the versatility of the transmitted navigation information, it is possible to enhance the versatility of the communication navigation system as a whole and promote the spread of the communication navigation system.

Further, even if the specification is changed in the server device, the navigation process can be continued by changing only the part corresponding to the change.

According to the invention described in claim 5, for all types of navigation information, one transmission unit is constituted by the attribute information, the size information, and the navigation information body, and the attribute is constituted by one or a plurality of transmission units. Since the navigation information is configured in such a manner that the terminal device recognizes the information, the size information, and the navigation information main body in this order, the navigation information of all types can be transmitted and received in the same transmission mode. Versatility can be improved.

Therefore, by increasing the versatility of the transmitted navigation information, it is possible to enhance the versatility of the communication navigation system as a whole and promote the spread of the communication navigation system.

Further, even when the specification is changed in the terminal device, the navigation processing can be continued by changing only the part corresponding to the change.

According to the invention of claim 6, claim 5
In addition to the effect of the invention described in (1), when the navigation information that should be used in the terminal device cannot be provided from the server device side, the fact is recognized and warned in the same manner as the other navigation information, which is desirable. The user of the terminal device can immediately recognize that the navigation process cannot be executed because the navigation information has not been transmitted, and the terminal device can continue to execute other navigation processes.

According to the invention described in claim 7, for all kinds of navigation information, one transmission unit is constituted by the attribute information, the size information and the navigation information body, and further transmitted by one or a plurality of transmission units. Since the navigation information to be performed is configured, the versatility of the navigation information can be improved by transmitting all types of navigation information in the same transmission mode.

Therefore, by increasing the versatility of the transmitted navigation information, the versatility of the communication navigation system as a whole can be enhanced and the spread of the communication navigation system can be promoted.

Further, even if a specification change occurs in the communication navigation system, the navigation process can be continued by changing only the part corresponding to the change.

[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 a flowchart showing a data transmission / reception process according to the embodiment, (a) is a flowchart showing a data transmission process according to the embodiment, and (b) is a flowchart showing a data reception process according to the embodiment. Is.

FIG. 6 is a diagram showing a packaging aspect of the embodiment.

[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 5 ... Interface 10 ... Processing unit 11 ... Memory 12 ... Sensor section 14 ... Voice output section 15 ... Transceiver S ... Navigation system SV ... Server device T ... Terminal device IN ... Internet P, P1, P2, Pn, Pn-1 ... Package D ... Navigation data E ... Final package 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

Continued front page    F term (reference) 2F029 AA02 AB01 AB07 AB13 AC02                       AC14 AC18 AC19                 5H180 AA01 BB05 CC12 FF04 FF05                       FF13 FF22 FF25 FF33

Claims (7)

[Claims] 1. A terminal device that receives navigation information transmitted from a server device via a network while moving together with a moving body, and the server that transmits the navigation information to the terminal device via the network. And a data structure of the navigation information transmitted in a communication navigation system configured to perform a navigation process for assisting the movement of the mobile body by using the navigation information, for all types of the navigation information. Firstly recognized in the terminal device, attribute information indicating an attribute as the navigation process of the navigation information body used for the navigation process in the terminal device, and subsequently recognized in the terminal device after the attribute information,
The transmission unit is configured by size information indicating an information amount of information included in a transmission unit in transmission of the navigation information, and the navigation information body recognized subsequently to the size information in the terminal device. A data structure of the navigation information. 2. The data structure according to claim 1, wherein the navigation information body is error information indicating that the navigation information necessary for the terminal device cannot be transmitted from the server device. In addition, the attribute information has a content indicating that the navigation information body is the error information, and the data structure of the navigation information. 3. The data structure according to claim 1, wherein the information transmitted from the server device to the terminal device as the navigation information body is map information used in the navigation process, and a point in the navigation process. At least one of point information used for display or route information indicating a route that the moving body should travel in the navigation processing. 4. The server device included in the communication navigation system according to claim 1, wherein the navigation information body to be transmitted to the terminal device, the size information, and Using the attribute information, a configuring unit that configures the transmission unit, and using the configured one or more transmission units, the attribute information, the size information, and the navigation information body are recognized in the terminal device in this order. A server device, comprising: a generation unit configured to generate the navigation information in an aspect, and an output unit configured to output the generated navigation information to the corresponding terminal device. 5. The terminal device included in the communication navigation system according to claim 1, wherein when the navigation information is transmitted, from the transmission unit in the navigation information. Extracting means for extracting the attribute information and the size information, and the navigation information included in the transmission unit that includes the attribute information and the size information based on the extracted attribute information and the size information A terminal device, comprising: a recognition unit that recognizes the contents of the main body; and an execution unit that executes the corresponding navigation process based on the recognized contents. 6. The terminal device according to claim 5, wherein, when the navigation information body is the error information, the execution unit issues a warning that the necessary navigation information cannot be acquired from the server device. A terminal device characterized by being performed in the device. 7. A communication navigation system comprising: the server device according to claim 4; and the terminal device according to claim 5 or 6.