JP2000010786A - Server-client communication device and program downloading method using same device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evade the concentration of loads on a server and to reduce the handling frequency for access by storing a program management program that all clients can use in common and sending it to the respective clients by request. SOLUTION: Relating to the server 200, a program management table storage part 202 is equipped with the table wherein the relation between the machine kind of client-100 sides and service information that the respective clients desired to receive is managed and client programs are selected according to the information. A file transmission part 201 sends the program management table itself stored in the program management table storage part 202 to the requesting clients 100 by request to download the programs which are made by the clients 100. Further, client programs specified by the clients 100 are taken out of a client program storage part 203 and sent to the clients 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device used for communication between a server and a client, and a method for downloading a program using the communication device.

[0002]

2. Description of the Related Art In a communication device including a server and a client, various methods have been proposed as a method of downloading a program from a server to a client. However, the method can be roughly classified into the following two methods. it can.

In a first configuration, a server obtains information from a client and determines a program to be downloaded and whether or not a version upgrade is necessary. As such a method, for example, Japanese Patent Application Laid-Open No. 07-049819 (communication method of server / client method) is known. In this method, the client notifies the server of the type of software required and determines the file to be downloaded by the server.

Japanese Patent Application Laid-Open No. H10-021080 (program data download method and control device) discloses a method in which a client notifies a server of hardware type information and the server determines whether or not a version upgrade is necessary. If so, a configuration for downloading is disclosed. Japanese Patent Laying-Open No. 01-245346 (information download system) discloses a configuration in which a client notifies a server of software version information, and the server determines whether or not to upgrade the software, and downloads the software if necessary. ing.

[0005] A second configuration is to distribute processing for determining a program file to be downloaded to clients. For example, Japanese Patent Application Laid-Open No. 08-179951 (Program Download System and Program Download Method)
It has been known. In this configuration, when an application is executed on the client, a method is employed in which the latest version of the application program stored in the client is inquired to the server, and if a version upgrade is required, the server is requested to transfer the latest version. Have been.

In this configuration, every time a user executes an application, communication occurs between the client and the server, and the load on the server cannot be reduced.

[0007] Japanese Patent Application Laid-Open No. 08-249163 (Software version management of network system) discloses that an upgraded client notifies a network of version information, and a client receiving the information compares its own version with the received version. do it,
A configuration is disclosed in which, when it is determined that a version upgrade is necessary, a transfer request for a new version of a program is issued to a notification source of version information.

[0008]

Among the above configurations, in a system for searching for software to be downloaded by a server as in the first configuration, the processing load on the server increases as the number of connected clients increases. On the other hand, in the second configuration, a plurality of models and clients having different hardware configurations are connected, and in a system that provides a plurality of services, version information of a large number of software is transmitted over a network.
Network usage efficiency may be reduced.

A server-client communication device according to the present invention aims to avoid concentration of a load on a server and reduce the frequency of network access. That is, the present invention is assumed to be applied to an information service system in which a large number of terminals (hereinafter, referred to as “clients”) are connected. In particular, even if each client does not accumulate application programs on a hard disk or the like, has the feature of downloading from a server when the power is turned on, etc., and has a different model or hardware option configuration for each client. The purpose is to enable efficient program download.

[0010] It is another object of the present invention to enable efficient program download even in an information service system in which services provided for each client may be different.

[0011]

A server device in a server-client communication device according to the present invention stores a client program storage section in which a client program to be executed by a client is stored, and a client program corresponding to attribute information possessed by the client. It has a program management table for managing, and a file transmission unit for transmitting the client management table and the client program to the client. The file transmission unit includes a program management table transmission unit that transmits a program management table to the client in response to a request from the client, and a client program transmission unit that transmits the client program specified by the client to the client.

Further, the server device may be provided with a client program registration unit for registering a client program, so that a new client program can be additionally registered. Further, a client program updating unit for updating the client program in the program management table may be provided.

On the other hand, the client device of the present invention receives an attribute information setting section for setting attribute information possessed by the client, a service information management table for setting service information received by the client, and a program management table held by the server. A program determining unit for comparing the attribute information and the service information to select a client program, a program receiving unit for requesting a server to download the client program and receiving the client program, and a program storing unit for storing the client program And Here, the attribute information includes model information on the model of the own device, and the attribute setting unit includes a hardware information detecting unit that detects or sets the model information. Further, the hardware information detection unit further includes optional hardware information specified by the optional hardware of the client. On the other hand, the attribute information may include information on an operating system installed in the client device. The client device may further include a nonvolatile memory that can rewrite all or a part of the setup program from a program stored in the program storage unit. The selection of the client program in the client device may be performed only from the attribute information, or may be performed only from the service information.

A server-client communication device according to the present invention comprises the above-described server device and client device. In such a configuration, a program can be downloaded when the power of the client device is turned on. Further, the client device may execute the download of the program at a predetermined cycle. In addition, the server of the present invention
In the program download method using the client communication device, the client device first requests the server to transmit a program management table, and upon receiving the request, the server device transmits the program management table to the client by a file transmission unit. next,
In the client, the program management table is received by the program judging unit, collated with the attribute information and the service information, and a client program is selected.
Then, the client requests the server to transmit the client program. In the server device,
The file transmitting unit transmits the requested client program to the client. In the client device, the client program is received by the program receiving unit and stored in the program storage unit. The server-client communication device of the present invention includes, on the server device side, a client program storage unit and a management table for managing the programs stored therein. When the client device downloads the program, the program to be downloaded must be specified from the service information that the user wants to receive and the model information of the user. In the present invention, this selection is performed on the client device side. There is a feature. That is, in the communication device of the present invention, when the client downloads the program, the server first transmits the program management table. Then, the model information of the accident device set in advance and the service information to be received are compared with the program management table, and the client device selects a program to be downloaded. Then, the selected client program is transmitted to the server device side, and the server device receiving this transmits the selected program to the client device. The client device receives the program transmitted from the server device and stores it in the program storage unit. In order to more efficiently select a client program on the client device side, the program management table has a hierarchical structure. For example, the service information is in the upper layer and the attribute information is in the lower layer. ,
You may make it select sequentially.

By adopting such a configuration, it is not necessary for the server device to select a program according to the model of each client device and a required service, and the load imposed on the server device is greatly reduced. Will be able to do it.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a server / client communication device according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a first example of the server-client communication device of the present invention.
FIG. 3 is a block diagram showing a configuration of the example. FIG. 2 shows FIG.
3 is a block diagram showing details of a server device (hereinafter, referred to as “server”) and a client device (hereinafter, referred to as “client”) in the configuration shown in FIG. In FIG. 1, a client 100 is a server 2
It has a function of downloading an application program from 00. On the other hand, in the server 200, a plurality of client programs that are uniquely determined by a combination of a client model, an optional hardware configuration, and a subscribed service are stored in advance.

The client needs to download an appropriate one of these programs. In order to be able to cope with this, the server 200 has a program management table in the storage unit 202 in which client models, optional hardware, service selection, and client programs are associated. When downloading the application program, the client 100 first stores the program management table in the server 20.
0, and then the attribute information detection unit 101 detects information necessary for the client program, such as model and optional hardware information. Further, the type of service to be provided to the client is acquired from the service information management table 102, and the information is collated with the program management table to determine an appropriate client program file name. 20
Start from 0. The attribute information includes, in addition to hardware information such as the model of the client, information on an operating system installed on the client, information on firmware that is not downloaded, for example, firmware stored in ROM, and information on a version of the firmware itself. Alternatively, the information may be information on the version of the program stored in the program storage unit 103.

According to the method described above, the function of the server is:
A file such as a program management table or a client program is stored, and the file is transmitted in response to a request from the client, thereby facilitating the construction of the server. At the same time, a flexible program download is possible even in an information service system in which different client models are connected and hardware options and services to be provided are specified in detail. First, the configuration of the server 200 will be described with reference to FIGS. FIG.
, The server 200 has a client program storage unit 203 in which various client programs are stored.
And a program management table storage unit 202 for managing the programs stored therein. The program management table storage unit 202 specifically manages a model of the client 100 and a relationship with service information desired by each client, which will be described later, and selects a client program based on the information. Table. The server 200 includes a file transmission unit 201 in addition to the above. The file transmission unit 201 has a function of transmitting the program management table itself stored in the program management table storage unit 202 to the client 100 that has received the request in response to the request that the client 100 wants to download the program. Have. Further, it has a function of extracting a client program specified by the client from the client program storage unit 203 and transmitting it to the client 100. The above is the basic configuration and basic functions of the server 200. The configuration will be described in more detail with reference to FIG. The server 400 shown in FIG. 2 is the server 20 shown in FIG.
0 is a more detailed configuration. The program management table storage unit 403, the client program storage unit 404, and the file transmission unit 406 correspond to the program management table storage unit 202, the client program storage unit 203, and the file transmission unit 201 in FIG. 1, respectively. In FIG. 2, the program management table updating unit 4
1, a client program input unit 402, a communication control unit 407, and an initialization information instruction unit 405 are shown. When adding a new program that can be provided to the client on the server 400 side or upgrading an existing program, the client program input unit 402 inputs the program from the client program input unit and stores the client program. The storage in the unit 404 is performed. Program management table update unit 401
Is to update the program management table when it becomes necessary to update the program management table in accordance with the input of the program or the like.

The communication control unit 407 includes a client 300
In response to a request from the side, communication control is performed to determine whether to transmit the program management table or to transmit the client program. Also, the initialization information instruction section 40
Reference numeral 5 denotes an instruction to initialize the hardware and the like on the client 300 side so that the reception state of the program management table is prepared prior to the transmission and reception. Next, returning to FIG. 1, the configuration of the client 100 will be described. The client 100 includes the program determination unit 1
04, an attribute information detection unit 101, a service information management table 102, a program reception unit 105, and a program storage unit 103. The attribute information detection unit 101 detects and registers attribute information of hardware constituting the client device, for example, various types of information such as a model and optional hardware connected to the main body hardware and an operating system. On the other hand, in the service information management table 102, various service information that may be received on the client 100 side is registered and managed.
The program determining unit 104 has a function of comparing the above-described attribute information and service information with the program management table transmitted from the server 200, and selecting a client program to be downloaded. Further, the program receiving unit 105 has a function of receiving the selected and downloaded client program, and the program storage unit 103 has a function of storing this program. Here, the client program to be downloaded from the server is selected from both the attribute information and the service information. However, the client program includes only the attribute information detection unit or the service information management table, and only one of the information is provided. May be selected from the client program. The client 300 shown in FIG. 2 shows the above configuration in more detail.

The service information input unit 301 enables timely addition and deletion of services for each client. In this embodiment, the service information is stored in the client 30
0 can be set, and the set information is accumulated in the service information management table 303 as needed.

The attribute information detection unit 302
This is a means for acquiring information on the model No. 00 and optional hardware, and is realized by, for example, software capable of reading out model information and hardware version information stored in a ROM, and detecting the presence or absence of optional hardware. . The program determination unit 306 acquires hardware information and service information from the attribute information detection unit 302 and the service information management table 303, and compares the hardware information and the service information with a program management table downloaded from the server 400 to specify an appropriate download program. I do.

The program storage unit 304 is a volatile memory for storing an application program downloaded via the program receiving unit 307. The file receiving unit 308 has a function of processing a program management table and a protocol for receiving a program,
It communicates with the file transmission unit 406 on the server 400. The communication control unit 309 is a communication control unit 407 of the server 300.
Establish a communication channel and provide transport services.

The setup program 305 is stored in a non-volatile memory (PROM). When the power is turned on, the setup program 305 performs setup, that is, initialization of hardware,
Execute the program download and start the application program.

Next, the configuration of the server 400 will be described.

The program management table storage unit 403 stores
A table is stored in which the model, hardware configuration, and service contents of the client in the information service system are associated with the file name of the client program uniquely determined from the information. When a new service or hardware is added, the program management table updating unit 401
With this, the stored contents are updated.

The client program storage unit 404 includes:
All types of client programs described in the program management table are stored. If a new client program needs to be added, the new client program is added from the client program input unit 402. The initialization information instructing unit 405 provides information required by the client 300 for initialization in response to a request from the client 300. For example, it specifies the IP address of the client 300, the file name of the program management table that the client 300 needs to download first, and the like. The file transmission unit 406 communicates with the file reception unit 308 of the client 300 and sends out the requested file. The communication control unit 407 establishes a communication channel with the communication control unit 309 on the client 300 and provides a transport service.

Next, the operation of the embodiment of the server / client communication apparatus of the present invention shown in FIGS. 1 and 2 will be described with reference to FIGS.

FIG. 3 shows a client 300 and a server 40.
It shows the messages and data exchanged during zero.
FIG. 4 shows a processing procedure of the setup program 305 operating on the client 300.

In FIG. 3 and FIG.
When 00 is powered on and started up, the setup program 305 is started, and the hardware is first initialized. Following this, the setup program 305
Establishes a communication channel with the server 400, and acquires initialization information from the initialization information instruction unit 405 on the server 400. This procedure includes, for example, Dynamic H
ost Configuration protocol
1 (RFC2131) is used. As previously mentioned,
The initialization information includes the file name of the program management table. The setup program 305 requests the file having this file name from the server 400 and obtains the program management table stored in the program management table storage unit 403. I do.

The program management table illustrated in FIG. 5 describes a combination of client attribute information and service information, and a program file name corresponding to each combination. Setup program 305
Obtains the hardware configuration information from the hardware information detection unit 302, the service information from the service information management table 303, and matches each entry of the program management table to correspond to the hardware configuration and service information of the user. Search and determine the program file name.

The setup program 305 downloads the program file from the server 400.
The downloaded program is stored in the program storage unit 3
04, the program is started by the setup program 305, and the service is started.

Next, a description will be given of a second embodiment of the server / client communication apparatus and the program download method using the same according to the present invention.

FIGS. 6 to 8 show the operation of the second embodiment. The configuration of the communication device itself can be the same as that of the first embodiment shown in FIGS.

However, in the first embodiment, the setup program 305 is stored in a non-volatile memory (hereinafter, referred to as “PROM”), whereas in the second embodiment, the setup program 305 is stored in a PROM, Rewritable nonvolatile memory (for example, flash memory: F
ROM, hereinafter referred to as “FROM”. ) Is stored separately. In this embodiment, in particular, the part related to hardware initialization in the setup program 305 is P
It is assumed that a portion for processing a program management table and a program file in the ROM and downloading the program is stored in the FROM. Further, F
A version is given to a part of the setup program 305 stored in the ROM, and the setup program 305 has means for reading the version information.

The following description explains that, with this configuration, the portion of the setup program 305 written in FROM can be upgraded from the server 400 via the network.

FIG. 8 shows an example of a program management table according to the second embodiment. With respect to the program management table of the first embodiment shown in FIG.
A ROM version has been added. Comparing the first and second lines in the table of FIG. 8, the attribute information and the service information are:
Identical, only FROM version is F1 and F
2 is different.

It is now assumed that the latest version of FROM is F2. For a client whose FROM version has already been upgraded to F2, the setup program 305 executes the program file PROG
Download 2 and launch it. This procedure is the same as in the first embodiment.

On the other hand, a client whose FROM version has not been upgraded to F1 downloads the program file PROG1 and starts it. Here, PROG1 includes a software program for rewriting FROM and a FROM version F
2 includes a part stored in the FROM. FIG. 7 shows the processing flow. When PROG1 is activated at the lowermost position on the left, first, FROM
Is rewritten to F2. After this operation is completed, PROG1 activates the setup program in the FROM, that is, the setup program 305 updated to F2.

The setup program downloads the program management table again and searches for an appropriate program file from the table. Here, since the FROM version is already F2, this time,
Download PROG2. As a result, a normal application is started.

FIG. 6 shows messages exchanged between the client 300 and the server 400 according to the above sequence. As described above, in the second embodiment, the client 300 can automatically execute the version upgrade of the setup program 305 via the server 400 in addition to the download of the application. Next, a third embodiment of the server-client communication device of the present invention will be described. In the third embodiment, the basic configuration of the server device and the client device is the same as the configuration of the second embodiment already described. However, the third embodiment is different in that the program management table has a hierarchical structure. That is, when the size of the program management table becomes large, it may take time for the client side to select a client program to be downloaded from predetermined information. This can be solved by introducing a hierarchical structure into the program management table, and efficient program selection can be performed. FIG. 9 is a diagram showing a program management table of the server device in the third embodiment of the server / client communication device of the present invention.
In FIG. 9, the table on the left side represents the upper first management table, and the tables on the right side represent the lower second management table, and has a two-layer hierarchical structure as a whole. ing. FIG. 10 is a diagram showing an operation flow of the setup program in the third embodiment. As shown in FIG. 10, first, the first management table, which is the highest management table, is transmitted from the server to the client. On the client side, a second management table to be downloaded next is selected from predetermined information, for example, attribute information. Next, only the second management table selected from the plurality of second management tables is transmitted to the client again. Then, a client program to be finally downloaded is selected from the second management table based on the next information, for example, service information, and the program file is downloaded from the server to the client. Here, in the table shown in FIG.
A file identifier is displayed at the left end of each management table. If the identifier is T, the file to be downloaded is a lower management table.
Then, it is also possible to identify the program file.

In the above-described embodiment, a simple example in which the management table has two layers is shown for easy understanding, but it goes without saying that three or more layers may be used. For example, among the attribute information,
, A third management table is selected from the type of operating system, and then a client program is selected from the service information.

The hierarchical structure is introduced into the program management table as described above, the management table itself is sequentially selected from the upper management table according to predetermined information, and the client program to be collectively downloaded is selected by the lower management table. By doing so, even if the program management table itself becomes large, it is possible to prevent the transmission of this table itself from being burdened and to select an efficient program.

[0043]

As described above, according to the server of the present invention,
The client communication device adopts a configuration in which a program management table that can be commonly used by all clients is stored and transmitted to each client in response to a request. As a result, the process of determining the program to be downloaded can be distributed to each client, and load concentration on the server can be avoided.

Further, according to the present invention, the client downloads the program management table on the server once when the power is turned on, and downloads one appropriate program file. Therefore, the number of network accesses can be reduced. .

More specifically, a program determined from attribute information and service information is associated with a program management table on a server, and each client refers to the table when downloading a program. I have. For this reason, a program can be downloaded flexibly and easily even in a large-scale information service system in which a plurality of types of clients are mixed, different hardware options are implemented for each client, and different services are provided. become.

The application programs executed by the client are centrally stored in the server.
Since the version is centrally managed in the version management table, version management and version upgrade can be easily performed.

Further, addition and deletion of hardware options and services in the system can be easily performed only by registering the corresponding program in the server and changing the program management table. Each client determines the program to be downloaded based on its model, hardware information, and service information, so that the load on the server does not increase even if the number of connected terminals or the service menu increases. can give.

According to the configuration of the second embodiment, it is possible to upgrade the setup program resident in the client. For this reason, for example, a terminal device for on-demand video service for home use, as an optional service, providing Internet connection, home shopping, home banking service for each subscriber, or as optional hardware Special I / O devices can be connected, etc.
A great effect can be obtained in that programs required for each client operate on different information service systems. Furthermore, by making the program management table have a hierarchical structure and sequentially transmitting the program management table, more efficient selection of a client program becomes possible.

[Brief description of the drawings]

FIG. 1 is a first diagram of a server-client communication device of the present invention.
FIG. 3 is a block diagram showing a schematic configuration of the embodiment.

FIG. 2 shows a first example of the server-client communication device of the present invention.
It is a block diagram which shows the detailed structure of each of the server apparatus of this Example, and a client apparatus.

FIG. 3 shows a first example of the server-client communication device of the present invention.
FIG. 14 is a diagram showing a state of message exchange between a server device and a client device in the embodiment of FIG.

FIG. 4 shows a first example of the server-client communication device of the present invention.
FIG. 8 is a diagram showing an operation flow of a setup program in the example of FIG.

FIG. 5 shows a first example of the server-client communication device of the present invention.
FIG. 14 is a diagram showing a program management table of the server device in the embodiment of FIG.

FIG. 6 shows a second example of the server-client communication device of the present invention.
FIG. 14 is a diagram showing a state of message exchange between a server device and a client device in the embodiment of FIG.

FIG. 7 shows a second example of the server-client communication device of the present invention.
FIG. 14 is a diagram showing a program management table of the server device in the embodiment of FIG.

FIG. 8 shows a second example of the server-client communication device of the present invention.
FIG. 8 is a diagram showing an operation flow in a setup program in the example of FIG.

FIG. 9 shows a third example of the server-client communication device of the present invention.
FIG. 14 is a diagram showing a program management table of the server device in the embodiment of FIG.

FIG. 10 is a diagram showing an operation flow of a setup program in a third embodiment of the server / client communication device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 client 101 attribute information detection unit 102 service information management table 103 program storage unit 104 program determination unit 105 program reception unit 200 server 201 file transmission unit 202 program management table storage unit 203 client program storage unit 300 client 301 service information input unit 302 attribute Information detection unit 303 Service information management table 304 Program storage unit 305 Setup program 306 Program determination unit 307 Program reception unit 308 File reception unit 309 Communication control unit 400 Server 401 Program management table update unit 402 Client program input unit 403 Program management table storage unit 404 Client program storage unit 405 Initialization information instruction unit 40 6 File transmission unit 407 Communication control unit 500 Transmission path

Claims (28)

[Claims] A client program storage unit storing a client program to be executed by the client; a program management table for managing a client program corresponding to attribute information possessed by the client; A server device, comprising: a file transmission unit that transmits a file to a client. 2. A client program storage unit in which a client program to be executed by a client is stored; a program management table for managing a client program corresponding to service information specifying a service requested by the client; A server device, comprising: a file transmission unit that transmits a client program to the client. 3. A client program storage unit in which a client program to be executed by a client is stored, and the client program so that the client program can be specified from both attribute information of the client and service information specifying a service requested by the client. And a file transmission unit that transmits the client management table and the client program to the client. 4. A program management table transmission means for transmitting the program management table to the client in response to a request from the client, and a client program transmission for transmitting the client program specified by the client to the client. 2. The server device according to claim 1, further comprising means. 5. The server device according to claim 1, further comprising a client program registration unit for registering the client program. Server device. 6. The server device according to claim 5, wherein:
The server apparatus further comprises a client program updating unit that updates a client program in the program management table. 7. An attribute information setting section for setting attribute information possessed by a client, a service information management table for setting service information for specifying a service to be received by the client, and a program management table held by a server for receiving the attribute information. A program determining unit that selects a client program from information, a program receiving unit that requests the server to download the client program and receives the client program, and a program storage unit that stores the client program. A client device characterized by the above-mentioned. 8. An attribute information setting unit for setting attribute information possessed by a client, a service information management table for setting service information for specifying a service to be received by the client, and a service management table for receiving a program management table held by the server. A program determining unit that selects a client program from information, a program receiving unit that requests the server to download the client program and receives the client program, and a program storage unit that stores the client program. A client device characterized by the above-mentioned. 9. An attribute information setting unit for setting attribute information possessed by a client, a service information management table for setting service information for specifying a service to be received by the client, and a program management table held by a server for receiving the attribute information. A program judging unit for comparing information with the service information to select a client program, a program receiving unit for requesting the server to download the client program and receiving the client program, and storing the client program A client device comprising a program storage unit. 10. The method according to claim 1, wherein the attribute information includes model information on a model of the own apparatus, and the attribute information setting unit includes a hardware information detecting unit configured to detect or set the model information. The client device according to claim 7 or 9, wherein 11. The client device according to claim 7, wherein the hardware information detecting unit further includes option hardware information specified by option hardware of the client. 12. The client device according to claim 7, wherein the hardware information detection unit further includes version information indicating a version of a model of the device of the client. 13. The client device according to claim 7, wherein the attribute information includes information for identifying an operating system installed in the client device. 14. The client device according to claim 7, wherein all or a part of the setup program is rewritten from a program stored in the program storage unit. A client device comprising a possible non-volatile memory. 15. A server comprising the server device according to claim 1 or claim 4, and the client device according to claim 7 or claim 10. A server-client communication device characterized by the above-mentioned. 16. A server-client communication device comprising: the server device according to claim 2; and the client device according to claim 8. 17. A server-client communication device comprising: the server device according to claim 3; and the client device according to claim 9. 18. The server / client communication device according to claim 15, wherein the program management table includes:
A server and a client respectively corresponding to information included in the attribute information and having a hierarchical structure including a top management table at the top and a lower management table connected to the top management table. Communication device. 19. The server / client communication device according to claim 16, wherein the program management table includes:
A server and a client, each of which corresponds to information included in the service information and has a hierarchical structure including a top-level management table at the top and a lower-level management table connected to the top-level management table. Communication device. 20. The server / client communication device according to claim 17, wherein the program management table includes:
It has a hierarchical structure including a top management table at the top and a lower management table connected to the top management table, corresponding to the information included in the attribute information or the service information, respectively. server·
Client communication device. 21. The server / client communication device according to claim 15, further comprising: a server / client that executes the download of the program when the power of the client device is turned on. Communication device. 22. The server / client communication device according to claim 15, wherein the client device executes the download of the program at a predetermined cycle. Server-client communication device 23. A program download method using a server-client communication device according to claim 15, wherein, in the client device, a program management table requesting step for requesting the server to transmit a program management table; A program management table transmitting step of transmitting the program management table to the client by a file transmitting unit in the device; and a client program receiving the program management table by the program determining unit in the client device from the attribute information. A client program requesting step of requesting the server to transmit the client program in the client device; and A client program transmitting step of transmitting the requested client program to the client device by a transmitting unit; a program receiving step of receiving the client program by the program receiving unit in the client device; And a program storage step of storing the program in the program storage unit. 24. A method for downloading a program using a server-client communication device according to claim 16, wherein the client device requests the server to transmit a program management table to the server; A program management table transmission step of transmitting the program management table to the client by a file transmission unit in the device; and a client program receiving the program management table by the program determination unit in the client device from the service information. A client program requesting step of requesting the server to transmit the client program in the client device. A client program transmitting step of transmitting the requested client program to the client device by a file transmitting unit; a program receiving step of receiving the client program by the program receiving unit in the client device; A program storage step of storing a program in the program storage unit. A program download method using a server-client communication device. 25. A program download method using a server-client communication device according to claim 17, wherein, in the client device, a program management table requesting step of requesting the server to transmit a program management table; A program management table transmitting step of transmitting the program management table to the client by a file transmission unit in the device; and receiving the program management table by the program determination unit in the client device and receiving the attribute information and the service. A program selecting step of selecting a client program by collating with information; a client program requesting step of requesting the server to transmit the client program in the client device; In the server device, by a file transmission unit, a client program transmission step of transmitting the requested client program to the client device, and in the client device,
A program receiving step of receiving the client program by the program receiving unit; and a program storing step of storing the client program in the program storage unit. Method. 26. The program download method using the server-client communication device according to claim 18, wherein the client device requests the server to transmit the highest-order management table, which is the highest-order program management table. A program management table requesting step for transmitting the highest-level management table to the client by a file transmitting unit in the server device; and A management table selecting step of receiving a higher management table and sequentially selecting a lower management table from attribute information corresponding to the management table; a program selection step of selecting a client program from the attribute information; A client program requesting step of requesting the server to transmit the client program, and in the server device,
A client program transmitting step of transmitting the requested client program to the client device, a program receiving step of receiving the client program by the program receiving unit in the client device, and storing the client program in the program storage And a program storing step of storing the program in a unit. 27. The program download method using the server-client communication device according to claim 18, wherein the client device requests the server to transmit the highest-order management table, which is the highest-order program management table. A program management table requesting step for transmitting the highest-level management table to the client by a file transmitting unit in the server device; and A management table selecting step of receiving a higher management table and sequentially selecting a lower management table from service information corresponding to the management table; a program selection step of selecting a client program from the attribute information; A client program requesting step of requesting the server to transmit the client program, and a client program transmitting step of transmitting the requested client program to the client device by a file transmitting unit in the server device; A server-client communication device, wherein the client device includes: a program receiving step of receiving the client program by the program receiving unit; and a program storing step of storing the client program in the program storage unit. How to download programs using. 28. The program download method using the server-client communication device according to claim 19, wherein the client device requests the server to transmit the highest-order management table, which is the highest-order program management table. A program management table requesting step for transmitting the highest-level management table to the client by a file transmitting unit in the server device; and A management table selecting step of receiving the upper management table and sequentially selecting a lower management table from attribute information or service information corresponding to the management table; and selecting a client program from the attribute information or the service information. And a client program requesting step of requesting the server to transmit the client program in the client device; and transmitting the requested client program to the client device by a file transmitting unit in the server device. Sending a client program
A server-client communication device, wherein the client device includes: a program receiving step of receiving the client program by the program receiving unit; and a program storing step of storing the client program in the program storage unit. How to download programs using.