JP6779801B2 - Information terminal and information provision system - Google Patents

Description

The present invention relates to the technology of an information terminal and an information providing system.

Patent Document 1 describes a technique for limiting tabs used in a Web browser according to a predetermined type of content when opening content including a Web application using a Web browser mounted on an in-vehicle device.

Japanese Unexamined Patent Publication No. 2015-118520

The above technology has the effect of preventing the increase in memory usage and ensuring the operability as an in-vehicle device by not making the user aware of tab operations, but the type of content is determined and set in advance for each content to be provided. It is necessary to perform operation management, and the operation load is high.

An object of the present invention is to provide an information terminal and an information providing system that further improve the resource efficiency of the information terminal while suppressing the operation management load.

The present invention includes a plurality of means for solving at least a part of the above problems, and examples thereof are as follows. In order to solve the above problems, the information terminal according to the present invention is an information terminal that communicates with a predetermined server via a communication line, and stores information that specifies a limit amount of resources that can be used in the information terminal. When the information about the service is acquired by the storage unit, the browser control unit that acquires the information about the service provided from the server, and the browser control unit, the amount of the resource used from the information about the service is calculated. It is provided with a web application execution management unit that acquires specific information and determines a resource conflict by comparing it with the above limit amount and the amount of resources used in the information terminal.

According to the present invention, it is possible to provide an information terminal and an information providing system that further improve the resource efficiency of the information terminal while suppressing the operation management load. Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.

It is a figure which shows the structure of the information providing system to which the embodiment which concerns on this invention is applied. It is a figure which shows the data structure of a module storage part. It is a figure which shows the data structure of the required resource storage part. It is a figure which shows the folder structure of the storage part. It is a figure which shows the data structure of the functional resource table storage part. It is a figure which shows the hardware structure of a content server. It is a figure which shows the hardware configuration of an in-vehicle device. It is a figure which shows the flow of the Web application registration process. It is a figure which shows the flow of the Web application start processing. It is a figure which shows the example of the Web application launcher screen.

The information providing system to which the embodiment of the present invention is applied will be described below with reference to the drawings. It should be noted that FIGS. 1 to 10 do not show all the configurations of the information providing system 1, and for the sake of easy understanding, some of the configurations are omitted as appropriate.

FIG. 1 shows the structure of the information providing system 1 to which the embodiment of the present invention is applied. In the information providing system 1 to which the embodiment of the present invention is applied, the content server 100 and the in-vehicle device 200 are connected to each other so as to be able to communicate with each other via the communication network 10.

The content server 100 and the in-vehicle device 200 may be wirelessly connected via the communication network 10, and the communication network 10 is, for example, a public wireless communication network such as an Internet network or a mobile phone network. It may be a closed communication network provided for each predetermined controlled area. More specifically, such a communication network 10 includes the Internet, a LAN (Local Area Network), a WAN (Wide Area Network), a WiFi (WiFi) via an antenna 35 of a wireless communication device 30 and an antenna 250 of an in-vehicle device 200. It may be a communication network in which various communication methods are combined, such as a wireless network such as a registered trademark) or a short-range wireless network such as NFC (Near Field Communication: registered trademark).

The content server 100 is communicably connected to the Web application registration device 20 via the communication network 10. The Web application registration device 20 mounts the created Web application on the content server 100. The Web application registration device 20 is a general computer device that mounts the Web application on the content server 100 when an instruction for enabling the use of the Web application from the in-vehicle device 200 is received from the operator. Generally, the Web application registration device 20 is used by the creator / provider of the Web application.

The content server 100 is an information processing device capable of executing various software. In the present embodiment, the content server 100 includes an OS (Operating System), a plurality of software can be installed, and the software can be executed in parallel. The content server 100 is not limited to the server device, and may be any device that can operate independently, such as a personal computer.

The content server 100 includes a control unit 120, a storage unit 130, and a communication unit 140. The control unit 120 includes an in-vehicle device communication control unit 121, a Web application registration unit 122, a required resource information management unit 123, and a Web application execution unit 124. The storage unit 130 includes a module storage unit 131 and a required resource storage unit 132.

FIG. 2 is a diagram showing a data structure of the module storage unit 131. In the module storage unit 131, display information and processing information are stored in association with each other for each software identifier. Specifically, the module storage unit 131 includes a software identifier 131A, a display content file 131B, a display style file 131C, and a script file 131D.

The software identifier 131A is predetermined information for identifying the software. The display content file 131B stores information to be displayed by the software, that is, information related to text, text structure, layout, and the like. More specifically, the display content file 131B stores a data set of display information described by so-called HTML (HyperText Markup Language), XML (eXtensible Markup Language), or the like.

The display style file 131C stores software display modification information, that is, font information and color specification information. More specifically, the display style file 131C stores a data set such as a so-called CSS (Cascading Style Sheet).

The script file 131D stores information that controls software processing, that is, information about the program. More specifically, the script file 131D stores information that identifies a function, method, procedure, or the like such as a so-called Javascript (registered trademark). That is, it can be said that the script file 131D stores control information that defines software processing.

FIG. 3 is a diagram showing a data structure of the required resource storage unit 132. In the required resource storage unit 132, the used native function identifier 132B is associated and stored for each software identifier 132A. The software identifier 132A is predetermined information for identifying the software. The native function identifier 132B used is information that identifies the function of the in-vehicle device 200 used in the software. For example, the function of the vehicle-mounted device 200 includes resources that can be used in the vehicle-mounted device 200, and the resources include interface resources that utilize the navigation device function.

The resources are not limited to these, and at least one or both of hardware resources and software resources are included. For example, hardware resources include displays, speakers or cameras. Software resources include an image buffer, an audio stream, an API (Application Programming Interface) related to destination setting of a navigation function, an API related to camera control, and the like.

FIG. 4 is a diagram showing a folder structure of the storage unit 130. As described above, the storage unit 130 includes the module storage unit 131 and the required resource storage unit 132, but these are not limited to being stored by the above-mentioned data structure, and the folder structure of the tree structure of FIG. A text file, an image file, a script file, or the like may be arranged according to the situation. In such a general folder structure, the "WebApplication1" 130B folder for storing the software modules whose software identifier is "WebApplication1" and the software module group whose software identifier is "WebApplication2" are stored in the Root130A folder. The "Web Application 2" 130C folder to be stored is stored. Further, the present invention is not limited to this, and when software is further arranged, folders are provided in parallel for each software identifier.

For example, in the "WebApplication1" 130B folder, there are a "html" 130D folder for storing HTML files, a "css" 130E folder for storing CSS files, a "Javascript" 130F folder for storing Javascript files, and Javascript. A "nativefunction.txt" 130G file, which is a file listing the identifiers of the native functions (resources) to be used, is provided.

The above-mentioned folder structure is an example, and may be another data structure such as a relational database.

Returning to the description of FIG. The in-vehicle device communication control unit 121 controls communication with the in-vehicle device 200. Specifically, the vehicle-mounted device communication control unit 121 controls wireless communication with the vehicle-mounted device 200, which is an opposite device. For wireless communication, various communication methods such as various wireless communication methods such as 802.11x, various communication methods via a mobile phone network, and wireless communication methods via Bluetooth (registered trademark) are adopted. be able to.

The Web application registration unit 122 registers modules and setting files related to the Web application that can be used via the in-vehicle device communication control unit 121 so that they can be used when they are received from the Web application registration device 20. Specifically, the Web application registration unit 122 assigns a software identifier and forms and stores the received module, setting file, and the like in the above-mentioned folder structure. In this process, the Web application registration unit 122 requests the required resource information management unit 123 to extract the required resources, and stores the native function to be used in the required resource storage unit 132.

When the required resource information management unit 123 receives the request from the Web application registration unit 122, the required resource information management unit 123 stores the plug-in function used in the Web application to be registered in the required resource storage unit 132. Specifically, the required resource information management unit 123 analyzes the script portion of the module of the Web application to be registered and extracts the call instruction of the native plug-in. Then, the required resource information management unit 123 stores the identifier of the native function (resource) in the used native function identifier 132B of the required resource storage unit 132 in association with the software identifier 132A.

The native plug-in call instruction is described, for example, as an API of Javascript via the "setData (id, Sdata)" method. Here, "id" is, for example, an identifier of the destination setting function, and "Sdata" is, for example, a coordinate value of GPS (Global Positioning System). In this case, the navigation software can be instructed to set the destination at the position indicated by the coordinate value.

Further, for example, the load API of the Web application is described via the “setData (id, Apple_url, Table)” method. Here, "id" is, for example, an identifier of an access function to a designated URL (Uniform Resource Locator), "Appl_url" is a URL for starting a Web application, and "Table" is a list information of resources used by the Web application. In this case, it is possible to give an instruction to start the Web application specified by the URL and a list of resources used by the Web application.

The Web application execution unit 124 performs control processing of software executed as a Web application. Specifically, the Web application execution unit 124 generates a menu screen that receives an instruction to start the Web application, generates a notification screen for various messages of the Web application, executes predetermined control, generates a processing result display screen, and the like. It becomes a software engine that executes various processes of. The Web application describes an example in which the processing subject is the content server 100, but the present invention is not limited to this, and even if a separate Web application execution server or the like (not shown) is used as the execution subject. Alternatively, it may be realized by grid computing in which processing is performed in cooperation with distributed servers such as a database server.

The communication unit 140 performs a process in which the content server 100 connects to an open network such as a mobile phone carrier network or the Internet.

The in-vehicle device 200 is an information processing device that displays various types of information such as route information, detour facilities, traffic jam information, and accident information superimposed on map information. The in-vehicle device 200 is connected to the communication network 10 that can be connected to the content server 100 via wireless communication, and can realize a connection to the Internet or the like.

In the present embodiment, the in-vehicle device 200 is assumed to be an information terminal that can operate independently. However, the in-vehicle device 200 that is the subject of the present invention is not limited to the in-vehicle device 200 shown in FIG. For example, it may be various control devices, car navigation devices, etc. incorporated in a moving body such as a vehicle.

Further, the in-vehicle device 200 may be provided detachably on a moving body or a driver. Alternatively, the in-vehicle device 200 may be a mobile terminal such as a mobile phone device owned by a mobile driver or occupant, for example, a smartphone, a feature phone, a PDA (Personal Digital Assistance), a laptop computer, a server device, or a tablet. It may be a terminal or the like.

The in-vehicle device 200 includes a control unit 220, a storage unit 230, and a wireless communication unit 240. The control unit 220 includes a server communication control unit 221, a basic function control unit 222, a browser control unit 223, a native plug-in control unit 224, and a Web application execution management unit 225. The functional resource table storage unit 231 is stored in the storage unit 230.

FIG. 5 is a diagram showing a data structure of the functional resource table storage unit 231. In the function resource table storage unit 231, the number of available resources 231B and the comment (function description) 231C are stored in association with each other for each native function identifier 231A. The native function identifier 231A is information that identifies the native function (resource) of the in-vehicle device 200. The number of available resources 231B is information for specifying an upper limit value related to parallel use of native functions identified by the native function identifier 231A. Comment (function description) 231C is text information relating to the description of the native function identified by the native function identifier 231A.

For example, for the native function via the native plug-in related to POI registration on the map where the native function identifier 231A is "0x1111", the number of available resources 231B is "2", so that the number of available resources is "2". If three or more resources are used for POI registration, there is a risk of information loss, display loss, etc. due to unexpected operation or overwriting of POI, which deviates from the appropriate usage situation.

As described above, the function resource table storage unit 231 has a data structure in which the native function identifier 231A, the number of available resources 231B, and the comment (function description) 231C are associated with each other. As shown, the data may be managed in a CSV (Comma-Separated Values) format file in which each data is connected by a comma.

Returning to the description of FIG. The server communication control unit 221 controls communication with the content server 100. Specifically, the server communication control unit 221 controls wireless communication with the wireless communication device 30 for communicating with the content server 100 which is an opposite device.

The basic function control unit 222 controls the processing of the basic functions of the in-vehicle device 200. For example, the basic function control unit 222 starts and ends the in-vehicle device 200, mode management, input / output control, communication control, navigation function control, voice output control, in-vehicle camera control, vehicle network (CAN: Controller Area Network or LIN). : A control unit that realizes basic operations of the in-vehicle device 200, such as participation in a closed network such as Local Interconnect Network).

The browser control unit 223 controls the Web browser included in the in-vehicle device 200. A Web browser is basically a browser for browsing general websites, and is used for browsing various websites such as HTML interpretation, rendering, HTTP (HyperText Transfer Protocol) communication, JavaScript processing execution, and CSS application. Controls the general processing for.

The native plug-in control unit 224 controls an interface function that uses a native function included in the in-vehicle device 200, specifically, a control performed by the basic function control unit 222 via a predetermined plug-in API.

The Web application execution management unit 225 manages the execution of the Web application. Specifically, when the input such as the click of the launcher icon of the Web application displayed on the browser control unit 223 is detected by the basic function control unit 222, the Web application execution management unit 225 is displayed on the clicked screen. The position is received from the basic function control unit 222, and the clicked launcher icon is specified. Then, the Web application execution management unit 225 downloads the execution module of the Web application corresponding to the icon from the content server 100, assigns a predetermined tab as the execution environment, and starts it. In the process, the Web application execution management unit 225 acquires information for specifying the amount of resources to be used from the information related to the Web application (service), and sets the limit amount and the amount of resources used in the in-vehicle device 200. Judge resource conflicts by comparison.

The wireless communication unit 240 performs a process in which the in-vehicle device 200 connects to a network such as the communication network 10.

FIG. 6 is a diagram showing a hardware structure of the content server 100. The content server 100 includes an input receiving device 101, an arithmetic unit 102, a communication device 103, a main storage device 104, a wireless communication device 105, a display device 106, and a bus 108 connecting them. To.

The input receiving device 101 is various input devices such as hardware buttons, a keyboard, and a touch panel. The arithmetic unit 102 is, for example, an arithmetic unit such as a CPU (Central Processing Unit).

The communication device 103 is a device such as a network module that establishes a communication path with an unspecified device and transmits / receives information via a communication network 10 such as a mobile phone network or the Internet.

The main storage device 104 is, for example, a memory device such as a RAM (Random Access Memory).

The wireless communication device 105 is a device that wirelessly communicates with surrounding devices by using a predetermined protocol such as Bluetooth or NFC.

The display device 106 is a device that outputs a display such as a liquid crystal display or an organic EL (Electroluminescence) display.

Each function unit of the control unit 120 described above, that is, the in-vehicle device communication control unit 121, the Web application registration unit 122, the required resource information management unit 123, and the Web application execution unit 124, has the arithmetic unit 102 read and execute a predetermined program. Is constructed by. Therefore, the main storage device 104 stores a program for realizing the processing of each functional unit.

It should be noted that each of the above-mentioned components is a classification of the configuration of the content server 100 according to the main processing contents in order to facilitate understanding. Therefore, the invention of the present application is not limited by the method of classifying the components and the name thereof. The configuration of the content server 100 can be further classified into more components according to the processing content. It can also be categorized so that one component performs more processing.

Further, each functional unit of the control unit 120 may be constructed not only by the CPU but also by hardware (ASIC, GPU, etc.). Further, the processing of each functional unit may be executed by one hardware or may be executed by a plurality of hardware.

FIG. 7 is a diagram showing a hardware structure of the in-vehicle device 200. The in-vehicle device 200 includes an input receiving device 201, an arithmetic unit 202, a wireless communication device 203, a main storage device 204, an external storage device 205, an in-vehicle network communication device 206, a position detection device 207, and an output display device. It is configured to include 208 and a bus 210 connecting them.

The input receiving device 201 is various input devices such as hardware buttons and a touch panel. The arithmetic unit 202 is, for example, an arithmetic unit such as a CPU.

The wireless communication device 203 is a device such as a network module that establishes a communication path with another device such as a content server 100 and transmits / receives information via a wireless network or Bluetooth.

The main storage device 204 is a memory device such as a RAM.

The external storage device 205 is a device that writes information to, for example, a hard disk, an SSD (Solid State Drive), or other various non-volatile storage media, or reads predetermined information from the non-volatile storage medium.

The vehicle-mounted network communication device 206 is a device that communicates with other devices connected to the vehicle-mounted network such as CAN.

The position detection device 207 receives satellite waves such as GPS and obtains coordinates that specify a position on the earth.

The output display device 208 is a device that outputs a display such as a liquid crystal display or an organic EL (Electroluminescence) display.

Each function unit of the control unit 220 described above, that is, the server communication control unit 221 and the basic function control unit 222, the browser control unit 223, the native plug-in control unit 224, and the Web application execution management unit 225, have the arithmetic unit 202 a predetermined program. It is constructed by reading and executing. Therefore, the main storage device 204 stores a program for realizing the processing of each functional unit.

It should be noted that each of the above-mentioned components is a classification of the configuration of the in-vehicle device 200 according to the main processing contents in order to facilitate understanding. Therefore, the invention of the present application is not limited by the method of classifying the components and the name thereof. The configuration of the in-vehicle device 200 can be further classified into more components according to the processing content. It can also be categorized so that one component performs more processing.

Further, each functional unit of the control unit 220 may be constructed not only by the CPU but also by hardware (ASIC, GPU, etc.). Further, the processing of each functional unit may be executed by one hardware or may be executed by a plurality of hardware.

[Explanation of operation] Next, the operation of the process of registering the Web application from the Web application registration device 20 to the content server 100 will be described.

FIG. 8 is a diagram showing the flow of the Web application registration process. The Web application registration process is started when the content server 100 receives the Web application registration request.

First, the created Web application module is transmitted from the Web application registration device 20 to the content server 100 (step S101). Specifically, the Web application registration unit 122 requests the Web application registration device 20 to transmit the Web application module and various setting files, and the Web application registration device 20 requests the HTML file or CSS file to respond to the request. The Javascript file is transmitted to the content server 100.

Then, the Web application registration unit 122 stores the module of the Web application in a predetermined format (step S102). Specifically, the Web application registration unit 122 stores the Web application module received in step S101 in the module storage unit 131 according to its file format.

Then, the Web application registration unit 122 requests the necessary resource information management unit 123 to analyze the script part of the stored module, extract the call instruction of the native plug-in, and obtain the resource (native function identifier) as the necessary resource. The storage unit 132 is made to list (step S103). Specifically, the required resource information management unit 123 uses a regular expression or the like to describe all the description parts that call a predetermined native plug-in API (for example, the “setData” function) for the Javascript file received in step S102. Search for.

The required resource information management unit 123 extracts the used native function identifier to be passed as a predetermined argument from each of the description locations extracted as a result of the search, and adds it to the used native function identifier 132B of the required resource storage unit 132. (Add to the file of nativefunction.txt).

It should be noted that this process is an example on the premise that the format for calling the native plug-in API is a "setData" function in advance, and the native function identifier used is passed as the first argument thereof. Therefore, when an API in another format is used, the required resource information management unit 123 appropriately identifies the API call location by character string search according to the API format and acquires the native function identifier used. To do.

The above is the flow of the Web application registration process. According to this flow, when the Web application is registered in the content server 100, the calling location of the native plug-in API used is extracted and the used native function identifier is stored in the required resource storage unit 132. Can be done. Therefore, even if the number of Web applications as contents increases, the resources to be used can be automatically listed, so that the load related to operation management can be suppressed.

FIG. 9 is a diagram showing a flow of Web application activation processing. The Web application activation process is started when the browser control unit 223 of the in-vehicle device 200 is activated.

First, the browser control unit 223 loads the launcher content into the first tab and displays the Web application list screen (step S201). Specifically, the browser control unit 223 generates a predetermined launcher content or a launcher screen whose settings have been changed in advance in the in-vehicle device 200, and loads the launcher screen into the first tab. On the launcher screen, an icon or the like for receiving an instruction to start a Web application that can be executed by the in-vehicle device 200 is displayed.

FIG. 10 is a diagram showing an example of a Web application launcher screen. On the Web application launcher screen 300, icon images 301 to 303 of the Web application that are registered and can be executed by the in-vehicle device 200 are displayed in tiles. Each of the icon images 301 to 303 is associated with each of "Web application 1" to "Web application 3", and when a touch input to the icon is detected, the browser control unit 223 causes the corresponding Web. Accept as application startup specification. The Web application launcher screen 300 is a Web page composed of HTML, CSS, Javascript, and the like.

Then, the Web application execution management unit 225 acquires the necessary resources of the application that has received the start designation from the server (step S202). Specifically, the Web application execution management unit 225 is required to specify the software identifier for the Web application corresponding to the icon that has been designated to be started on the Web application launcher screen 300 displayed in step S201 and to the content server 100. Request the information of the resource storage unit 132. Then, the required resource information management unit 123 of the content server 100 identifies the used native function identifier 132B corresponding to the software identifier and transmits it to the Web application execution management unit 225.

Then, the Web application execution management unit 225 specifies the acquired necessary resources and instructs the start of the Web application (step S203). Specifically, the Web application execution management unit 225 gives a Web application start instruction to the native plug-in control unit 224, and also delivers the used native function identifier 132B transmitted in step S202 to compete for resources. Make a judgment.

Then, the Web application execution management unit 225 determines whether or not the Web application to be started uses the resources of the functional resource table (step S204). Specifically, the Web application execution management unit 225 refers to the functional resource table storage unit 231 and uses any of the required resources specified in step S203 in the functional resource table storage unit 231. Judge whether or not. When none of them are used (in the case of "No"), the Web application execution management unit 225 starts the Web application on the newly started tab (step S207).

When the Web application to be started uses at least one resource in the functional resource table (in the case of "Yes" in step S204), the Web application execution management unit 225 is in a state where the resources required for the Web application are in use. It is determined whether or not it is (step S205). Specifically, in the Web application execution management unit 225, the total of the required resources specified in step S203 and the resources used by the already started Web application is the limit amount of the functional resource table storage unit 231. It is determined whether or not the number of available resources is 231B or less. If the amount is less than the limit (in the case of "No" in step S205), the Web application execution management unit 225 starts the Web application on the newly started tab (Step S207).

When the resources required for the Web application are in use (in the case of "Yes" in step S205), the Web application execution management unit 225 is using the insufficient resources among the tabs that have already been started. Start the Web application on the tab (step S206).

The above is the flow of the Web application startup process. According to the Web application startup process, when a Web application that is expected to run out of resources is started, resource contention can be avoided by starting the Web application on a tab that already uses the resource. More specifically, in the conventional technology, another Web application is launched and the POI icon is additionally displayed while the Web application that displays the POI (Point Of Interest) icon is running on the map. When the icon buffer is insufficient and conflicts occur, there is a possibility that unexpected display or overwriting display may cause screen distortion, but this can be avoided by applying the present embodiment.

The above is the information providing system 1 according to the embodiment. According to the above embodiment, the information providing system 1 can further improve the resource efficiency of the information terminal while suppressing the operation management load when executing the Web application.

However, the present invention is not limited to the above embodiments. The above embodiments can be variously modified within the scope of the technical idea of the present invention.

For example, in the above embodiment, an example is shown in which the in-vehicle device 200 holds its own usable resources in the functional resource table storage unit 231 and determines resource contention on the in-vehicle device 200 when the Web application is started. However, it is not limited to this. For example, in the content server 100, resources that can be used according to the model and grade of the in-vehicle device 200 are stored in advance as a functional resource table, and when a request to start a Web application is received, the content server 100 conflicts with resources. Alternatively, it may be determined whether or not the application can be started. By doing so, it is possible to reduce the calculation load related to the resource management of the in-vehicle device 200.

Further, for example, in the above embodiment, when resources conflict, the Web application is started on the tab that uses the insufficient resource among the tabs that have already been started (step S206). , Not limited to this. For example, the Web application that is started first may be prioritized, or the Web that is started later on the condition that the user inquires whether to end the Web application that is started first and accepts the consent input from the user. You may start it according to a predetermined rule such as starting an application. By doing so, it is possible to improve the resource efficiency when using the Web application while suppressing the operation management load while eliminating the need for the user to be aware of the existence of the tab.

The present invention has been described above with reference to embodiments. However, the present invention is not limited to this, and the characteristic processing of the in-vehicle device described in the above embodiment is applied to another device (for example, it is applied to various information terminals such as a portable device such as a music player and a mobile router). ) Is also possible.

1 ... Information provision system, 10 ... Communication network, 20 ... Web application registration device, 30 ... Wireless communication device, 35 ... Antenna, 100 ... Content server, 120 ... Control Unit, 121 ... In-vehicle device communication control unit, 122 ... Web application registration unit, 123 ... Required resource information management unit, 124 ... Web application execution unit, 130 ... Storage unit, 131 ... -Module storage unit, 132 ... Required resource storage unit, 140 ... Communication unit, 200 ... In-vehicle device, 220 ... Control unit, 221 ... Server communication control unit, 222 ... Basic function Control unit, 223 ... Browser control unit, 224 ... Native plug-in control unit, 225 ... Web application execution management unit, 230 ... Storage unit, 231 ... Functional resource table storage unit, 240.・ ・ Wireless communication unit, 250 ・ ・ ・ Antenna

Claims (8)

An information terminal that communicates with a predetermined server via a communication line.
A storage unit that stores information that specifies the limit amount of resources that can be used in the information terminal.
A browser control unit that acquires information about services provided by the server,
When the information about the service is acquired by the browser control unit, the information for specifying the amount of the resource to be used is acquired from the information about the service, and the limit amount and the amount of the resource used by the information terminal are acquired. Web application execution management department that judges resource conflicts by comparing with
Equipped with a,
As a result of determining the conflict of the resources, the web application execution management unit uses the competing resources when the total of the amount of the resources used and the amount of the resources used in the information terminal is not less than the limit amount. Start the service using the tab to
Information terminal you wherein a. The information terminal according to claim 1.
The resource includes an interface resource that utilizes the navigation device function.
An information terminal characterized by that. The information terminal according to claim 1 or 2.
The resources include at least hardware resources and software resources.
An information terminal characterized by that. The information terminal according to any one of claims 1 to 3.
The resource includes at least a display as a hardware resource and an image buffer as a software resource.
An information terminal characterized by that. The information terminal according to any one of claims 1 to 4.
The resource includes at least a speaker as a hardware resource and an audio output stream as a software resource.
An information terminal characterized by that. The information terminal according to claim 1.
The resources include at least software resources related to setting the destination of the navigation function.
An information terminal characterized by that. The information terminal according to claim 1.
The resources include at least software resources related to camera control.
An information terminal characterized by that. An information providing system in which an information terminal and a server are connected so as to be able to communicate with each other via a communication line.
The information terminal is
A storage unit that stores information that specifies the limit amount of resources that can be used in the information terminal.
A browser control unit that acquires information about services provided by the server via the communication line, and
The web application execution management department that starts the service and
With
The server includes a storage unit that stores a web application that provides the service and information that identifies a resource of the information terminal used by the service in association with each other.
A web application execution unit that transmits information specifying the resources of the information terminal used by the service to the information terminal via the communication line.
With
The web application execution management department
When the information about the service is acquired by the browser control unit, the information for specifying the amount of the resource to be used is acquired from the information about the service, and the limit amount and the amount of the resource used by the information terminal are obtained. in comparison with the determined resource conflicts,
As a result of determining the competition of the resources, if the total of the amount of the resources used and the amount of the resources used by the information terminal is not less than the limit amount, the service is provided using the tab using the competing resources. Start up,
An information provision system characterized by this.

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