JPH06119182A - Information communication network system with down-load control function - Google Patents

Abstract

PURPOSE:To perform down-load without increasing burden on a host system even when the number of terminal systems is increased, and by shortening the service stopping time of a communication line, and without requiring maintenance by a person. CONSTITUTION:The host system 1 is provided with a program data base 3, a program transmission processing means 7 which performs the down-load of program data on the terminal system 2, and a restoration data transmission processing means 20 which performs the restoration processing of data not received by the terminal system 2. The terminal system 2 is provided with program data bases 15, 16 in which the program is stored, a restoration data reception processing means 21 for the data from the restoration data transmission processing means 20, and a program reception processing means 12 which receives the program data from the program transmission means 7 and also, stores the data received by the restoration data reception means 21 in the program data bases 15, 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information communication network system used for providing information from a host side to a large number of terminal systems, and more particularly to programs and data managed by the host system. The present invention relates to an information communication network system having a download control function, which is suitable for simultaneously reflecting a wide range and a large number of terminal systems without interrupting normal service operations.

[0002]

2. Description of the Related Art Some information communication network systems perform a service operation in which the same information is simultaneously provided from a host side to a large number of terminal systems.

In this type of system, it is necessary to change the program of the terminal system for the purpose of changing the service provided to each terminal system and correcting the program. In this case, it is necessary to replace the programs for all the terminals at once. As a program download control method in such a case, conventionally, there is a method of transmitting data (program) from a host system to a terminal system all at once using a one-way communication line.

An information communication network system using a one-way communication line has a host system and a plurality of terminal systems, and these are connected by a one-way communication line and a two-way communication line. . Downloading in this system is performed from the host system to the terminal system via a one-way communication line. The result is reported from the terminal system to the host system via the two-way communication line. If there is a terminal system that has failed in downloading, it is downloaded again by the one-way communication line, or the program is manually loaded into the terminal system.

When a certain terminal system is suspended and restarted, the program of the terminal system may be different from the version currently operated in the system. There is a method in which the version is determined for each terminal system and the necessity of data transmission is automatically determined to transmit the data. In such a case, it is determined whether or not the versions are different, automatically determine the necessity of data transmission, and transmit the data as needed. As one related to such an information download system, Japanese Patent Laid-Open No. 1-245
There is one described in Japanese Patent No. 346.

[0006]

However, in the case of transmitting data all at once using a one-way communication line, there are cases where the data cannot be received at all or some cannot be received depending on the state of the terminal system. . Furthermore, in the latter case, the data that could not be received may be different for each terminal system.

On the other hand, there are a method of downloading again through the one-way communication line after the completion of downloading, and a method of manually reflecting the data in the failed terminal system. However, in the case of the former, there is a problem that the download time increases and the normal terminal system cannot be serviced by the one-way communication line. Further, in the latter case, there is a problem that it takes time for manpower and movement.

The object of the present invention is not to increase the load on the host system even if the number of terminal systems is increased, to shorten the service stop time due to the occupation of the one-way communication line and the two-way communication line, and to require manual maintenance. It is to provide an information communication network system that can be downloaded.

[0009]

In order to achieve the above object, according to one aspect of the present invention, a host system and a plurality of terminal systems are provided, which connect one line from the host system to a terminal. In an information communication network system that is connected by one-way communication lines branched for the number of systems and two-way communication lines for the number of terminal systems to perform constant service operations, the host system stores a program for storing the program. A database,
When the program data is downloaded to the terminal system, it has program transmission processing means for performing transmission processing and recovery data transmission processing means for performing transmission processing for recovery of data that the terminal system could not receive. The processing means has a function of dividing the program data into predetermined units and transmitting the program data using a one-way communication line, and the recovery data transmission processing means includes the unreceivable program data transmitted from the terminal system. The terminal system has a function of receiving information regarding the information, reading out the portion of the program data indicated by the information from the program database, and transmitting it as recovery data to the corresponding terminal system via the two-way communication line. Is a program database that stores the received programs, and Recovery data reception processing means for receiving the recovery data sent from the recovery data transmission processing means, receiving the program data sent from the program transmission means, and receiving the received program data and the recovery received by the recovery data receiving means. Program reception processing means for storing data in the program database, and the program reception processing means has a function of detecting an unreceivable portion in the program data sent from the program transmission means. The recovery data reception processing means has a function of transmitting, to the host system, information indicating an unreceivable portion of the program data detected by the program reception processing means via the two-way communication line. Featuring That the information communication network system is provided.

According to another aspect of the present invention, while being connected to a plurality of terminal systems via a one-way communication line and individually connected to each terminal via a two-way communication line, In a host system that provides a service service to each terminal system via a directional communication line, a program database that stores a program, and a program transmission processing unit that performs a transmission process when the program data is downloaded to the terminal system, Recovery data transmission processing means for performing transmission processing for recovery with respect to data that the terminal system could not receive, and the program transmission processing means divides the program data into predetermined units to establish a one-way communication line. And the recovery data transmission processing means is transmitted from the terminal system. It has a function of receiving information about program data that could not be received, reading the part of the program data indicated by the information from the program database, and transmitting it as recovery data to the corresponding terminal system via the two-way communication line. A host system characterized by being a thing.

According to still another aspect of the present invention, a terminal that is connected to a host system via a one-way communication line and a two-way communication line and receives service work from the host system via the one-way communication line. In the system, a program database for storing the received program, recovery data reception processing means for receiving the recovery data sent from the recovery data transmission processing means,
Program reception processing means for receiving the program data sent from the host system and storing the received program data and the recovery data received by the recovery data receiving means in the program database. Has a function of detecting an unreceivable portion in the program data sent from the host system, and the recovery data reception processing means cannot receive the program data detected by the program reception processing means. There is provided a terminal system having a function of transmitting a part to the host system via a bidirectional communication line.

The program transmission processing means may have a function of dividing the program data and giving a division serial number to each divided portion of the divided program data. Further, the recovery data transmission processing means receives information about the program data that could not be received, which is sent from the terminal system, and reads the part of the program data indicated by the information from the program database in units of divided serial numbers. It can be sent to the terminal system.

The terminal system may further include a division serial number management table for setting and managing a flag indicating whether or not the program data is received for each division serial number of the program data received from the host system.

The program reception processing means can further have a function of detecting whether or not the received program data is received for each divided serial number and setting the result in the divided serial number management table.

The recovery data reception processing means may send a division serial number to the host system as the information indicating the part of the program data that could not be received.

The host system may further comprise means for managing the version of the data. in this case,
The program transmission processing means may further have a function of attaching data indicating a version, and the recovery data transmission processing means receives the version and the division serial number from the terminal system, and The method may further include a process of determining necessary data.

Correspondingly, the terminal system can be configured to further include means for managing the version of the received data.

[0018]

In the present invention, if the data is transmitted to the one-way communication line, it can be downloaded to a large number of terminal systems without increasing the load on the host system, and the data that cannot be received by the one-way communication is divided. By determining the serial number, the necessary part can be immediately recovered from the two-way communication line. As a result, the service stop time due to the occupation of the one-way communication line or the two-way communication line can be shortened. It should be noted that the terminal system that cannot receive all data can save manpower by determining the version and automatically downloading.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings.

In this embodiment, a host system and a plurality of terminal systems are divided into a one-way communication line obtained by branching one line from the host system by the number of terminal systems and a two-way communication line having the number of terminal systems. It is applied to an information and communication network system that is always connected and is always performing service work. FIG. 2 shows the basic configuration of an embodiment of the present invention.

This embodiment comprises a host system 1 and a plurality of terminal systems 2. Disk storage devices 51 and 57, which are auxiliary storage devices, are connected to the host system 1 and the terminal system 2, respectively. Between the host system 1 and the terminal system 2, a one-way communication control device 5
One-way communication line 13 capable of one-way data transmission from the host system 1 to all terminal systems 2 via the distribution devices 54 and 56, and communication control devices 52, 5 for two-way lines.
A bidirectional communication line 14 capable of individually transmitting and receiving data in both directions is connected via the communication line 5.

Host system 1 and terminal system 2
Are each configured by a computer. The host system 1 has a central processing unit (CPU) 1a and a memory 1b. Similarly, the terminal system 2 has a central processing unit (CPU) 2a and a memory 2b. In addition to the disk storage devices 51 and 57, these may be configured to further include a storage device such as a magnetic disk device. The disk storage devices 51 and 57 are, for example,
Although a magnetic disk device is used, the invention is not limited to this, and an optical disk device or the like may be used.

FIG. 1 shows a functional configuration for performing download control in the system of this embodiment. The program database 3 is built in the host system 1, for example, in the disk storage device 51. The program database 3 is stored on a built-in magnetic disk device (not shown).
Alternatively, it may be constructed on the memory 1b. The terminal system 2 includes program databases 15 and 16
And the divided serial number management table 60 are installed respectively. The program databases 15 and 16 and the division serial number management table 60 are configured on the disk storage device 57. Note that one or both of these may be constructed on a built-in magnetic disk device (not shown) or on the memory 2b.

The host system 1 has a program transmission process 7, a job distribution process 9 and a recovery data transmission process 20 as the functions of the CPU 1a. The program transmission process 7 converts the program data into the program database 3
And sends it to the terminal system 2 using the one-way communication line 13. Also, the recovery data transmission process 20
The program data requested to be recovered is retrieved from the program database 3 and recovery is performed using the two-way communication line 14. The business distribution process 9 processes a normal business of transmitting data and the like to each terminal system 2.

On the other hand, the terminal system 2 has a business process 10, a program reception process 12, and a recovery data reception process 21 as the functions of the CPU 2a. The program reception process 12 includes a one-way communication line 13 and a recovery data reception process 2.
Receive the message from 1 and see the division serial number in the message and judge the data omission, store the program data of the message in the program database (new) 15, and when the final data is received, the program database (new ) 15 is switched to the program database (old) 16.
If loss of data is detected, the bidirectional communication line 14 is used to request the host system 1 to recover the lost program data. Recovery data reception process 2
1 receives the recovery data from the two-way communication line 14 and contacts the program reception processing 12. The business process 10 is
Performs a normal service job of receiving data sent from the job distribution process 9 using the one-way communication line 13.
Note that the normal service work by the work distribution process 9 and the work process 10 is executed even while the program is being recovered.

FIG. 8 shows a data telegram format 350 used when downloading from the host system 1 to the terminal system 2. Data message format 350
Is composed of a message type 351 for identifying what the transmitted data is, a program name 352 of the program data, a division serial number 353, a maximum division serial number 354, and program data 371.

FIG. 9 shows a recovery request message format 360 used when a recovery request is issued from the terminal system 2 to the host system 1. Recovery request message format 360
Is a message type 351 for identifying what the transmitted data is, a program name 352 of the program data, and a start division serial number of the program data to be recovered, Fro.
The m serial number 355 and the To split serial number 356 which is the final split serial number of the program data to be recovered.

FIG. 6 shows the configuration of the division serial number management table 60 installed in the terminal system 2. The division serial number management table 60 includes a program name 352,
It comprises a data presence / absence flag 372 for managing the data reception status for each serial number.

FIG. 7 shows the structure of data storage in the program databases 15 and 16 installed in the terminal system 2. The program data 371 is managed in program name 352 and division serial number units.

Next, the operation of the program transmission / reception processing in the system of this embodiment will be described. First, the program transmission process from the host system 1 will be described, and then the reception process in the terminal system 2 will be described.

FIG. 3 is a processing flow of the program transmission processing 7 in the host system 1. First, the data of one record (the format of the data electronic message format 350) is read from the program database 3 (step 10).
1). Message type 351 of data message format 350
For example, "normal" is set as an identifier indicating that the data is normal data, and the message is edited (step 10).
2). Data is transmitted to the terminal system 2 using the one-way communication line 13 (step 103). The end of transmission of all telegrams is determined (step 104). If not completed, the process returns to step 101.

FIG. 4 is a processing flow of the program reception processing 12 of the terminal system 2. First, a message is received from the recovery data receiving process 21 and the one-way communication line 13 (step 201). The program data 371 in the message is stored in the entry of the program database (new) 15 indicated by the division serial number 358 (step 202), and the presence / absence of data is set in the data presence / absence flag 372 of the division serial number management table 60 (step 203). The message type 351 in the data message format 350 is determined (step 20).
4). When the message type 351 is normal data, it is determined from the data presence / absence flag 372 of the divided sequence number table 60 indicated by the value obtained by subtracting 1 from the divided sequence number 353 in the data message format 350 (step 20).
5). When data is missing, recovery request message format 36
A division serial number is set to the From division serial number 355 and To division serial number 356 of 0 and a recovery request is made (step 206).
When the division serial number 353 and the maximum division serial number 354 of the data telegram format 350 have the same value and all the data presence / absence flags 372 of the division serial number management table 60 have data, the reception of all telegrams is completed (step 207). If not completed, the process returns to step 201. When the processing is completed, the old / new data is switched from the program database (new) 15 to the program database (old) 16 (step 208).

FIG. 5 is a processing flow of the recovery data transmission processing 20 of the host system 1. The processing operation of the recovery data transmission process 20 will be described below.

First, the recovery request message format 360 is received from the terminal system 2 (step 301). From request serial number 355 of recovery request message format 360
For the data shown in, program database 3
The data of one record (data telegram format 350 format) is read from (step 302). In the message type 351 of the data message format 350, an identifier indicating recovery data, for example, "recovery" is set,
Edit the message (step 303). Bidirectional communication line 14
Is used to transmit data to the terminal system 2 (step 304). From of recovery request message format 360
When the division serial number 355 to the To division serial number 356 are transmitted, the recovery data transmission ends (step 305). If not completed, the process returns to step 302.

Next, the data exchange at the time of downloading between the host system and the terminal system in this embodiment will be described. FIG. 10 shows a data flow of an example in which data loss occurs during downloading.
In addition, FIG. 11 shows the transition of the divided serial number management table 60. 10 and 11, t1
~ T10 shows a timing.

The business distribution processing 9 and the business processing 10 use the one-way communication line 13 to perform normal service business. The program receiving process 12 uses the one-way communication line 13 to send the program data (1) from the host system 1.
Is received, the data is stored in the program database 15 (t2), and the data presence / absence flag 372 of the divided serial number management table 60 is set to "data present" (t).
1). Specifically, as shown in FIG. 11, "1" is set as "data present" in the data presence / absence flag.
The data presence / absence flag at this time is shown at t1 in FIG.

After that, it is assumed that the number of telegrams is received, and the data loss of the program data (n) and the program data (n + 1) occurs due to the occurrence of the line failure or the like (t3).
When the data (n + 2) is sent from the program sending process 7 due to the failure recovery, the program receiving process 12 stores the data (n + 2) in the program database 15 (t.
5) Then, the data presence / absence flag 372 of the divided serial number management table 60 is set to "data present" (t4). The state of the data presence / absence flag at this time is shown at t4 in FIG.

After that, the program reception processing 12 refers to the division serial number management table 60 to determine whether or not there is the data presence / absence flag 372 in the division serial number 353, thereby detecting a data omission, and from the program data (n) to the program data (n). (n + 1) is requested to the host system 1 for recovery using the bidirectional communication line 14 (t6). When the recovery data transmission process 20 of the host system 1 receives the recovery request for the missing data, it reads the corresponding program data from the program database 3 based on the division serial number of the requested program data, and retrieves the missing data. It is sent to the requesting terminal system via the bidirectional communication line 14. When the terminal system 2 receives the program data (n) and the program data (n + 1) that are missing data, these are stored in the program database 15 (t
(8, t10), and the data presence / absence flag 372 of the divided serial number management table 60 is set to "data present", whereby the recovery ends (t7, t9). The states of the data presence / absence flag at this time are shown at t7 and t9 in FIG. After that, it becomes a normal reception pattern.

As described above, in the case of downloading from the host system to the terminal system in the information communication network system, even if the number of the terminal systems increases, the one-way communication line or the two-way communication line is occupied without increasing the load of the host system. Service downtime can be shortened and manpower can be saved.

In the above-mentioned embodiment, the version of the program is not particularly considered, but a system in which the version of the program is considered may be used. In this case, an identifier indicating the version of the program may be added to the transmission data, and the host system 1 and the terminal system 2 may be provided with version management tables respectively.

Next, another embodiment of the present invention will be described with reference to the drawings. This embodiment is an example having a program version management function.

FIG. 12 shows the basic structure of the entire embodiment.
This embodiment has a host system 1 and a terminal system 2. The host system 1 and the terminal system 2 are connected by a unidirectional communication line 13 capable of unidirectional data transmission from the host system 1 to the terminal system 2 and a bidirectional communication line 14 capable of bidirectional data transmission / reception.

As shown in FIG. 13, the host system 1
Has a program database 3, a version table 25, a terminal system report acceptance processing 40, a program transmission processing 27, a terminal unique data transmission processing 28, and a terminal common data transmission processing 29.

The terminal system 2 includes program databases 15 and 16 and version tables 37 and 3.
8, a recovery data reception process 41, a terminal common data reception process 31, a program reception process 32, and a terminal unique data reception process 30.

The version tables 25, 37, 38 are
For example, it is configured as shown in FIG. That is, these tables are composed of the version number 401 corresponding to the program name 402 and the data identifier 403 for determining the line used when transmitting the program data.

The program databases 3, 15,
16 is configured as shown in FIG. 18, for example. These tables are composed of a program name 402 and program data 502.

The program transmission process 27 in the host system 1 uses the version number 401 and the program name 4
02 from the version table 25, and the corresponding program data 502 from the program database 3, are separated by a fixed length,
Edit the message. The edited message is given a division serial number for each delimiter. The program transmission process 27 determines the data identifier 403 assigned to each program name 402 unit, and performs the terminal-specific data transmission process 28 using the two-way communication line 14 or the terminal common data transmission 9 using the one-way communication line 13. , To the terminal system 2.

Further, the terminal system report acceptance processing 40
When the program name 402 and the version number 401 are reported, it is compared with the version number 401 stored in the version table 25, and when it is not the latest version, the program transmission processing 27 is requested to transmit data. On the other hand, when the program name 402, the version number 401, and the division serial number are reported, the terminal system report reception processing 40 transmits the data corresponding to the division serial number from the program database 3.

On the other hand, the terminal system 2 receives a telegram from the one-way communication line 13 and the two-way communication line 14 by the terminal-specific data reception process 30 and the terminal-common data reception process 31. In the program receiving process 32, the message is stored in the program database (new) 15 and the version table (new) 37 while determining the missing data from the division serial number in the message. When the final data is received, the program database (new) 15 to the program database (old) 1
6 and switching from the version table (new) 37 to the version table (old) 38.

If data loss is detected, the two-way communication line 14 is used to cause the host system 1 to drop the program name 402 and the version number 40.
Report 1 and the division serial number. And the two-way communication line 1
In the recovery data reception process 41 of 4, the electronic message is received again and recovery is performed. When the terminal system 2 is started up, the program name 402 and the version number 401 are retrieved from the version table (old) 38, and the report is sent to the host system 1 using the bidirectional communication line 14.

FIG. 14 is a processing flow of the program transmission processing 27 in the host system 1. First, one record is read from the version table 25, and the version number 401, the program name 402, and the data identifier 40 are read.
3 is taken out (step 101). Program name 40
The program data 502 corresponding to 2 is retrieved from the program database 3 (step 102). The program data 502 is divided into a certain length, divided serial numbers are added, and the electronic message to be transmitted from the version number 401, the program name 402, and the data identifier 403 to the terminal system 2 is edited (step 103). The data identifier is determined (step 104). If the data identifier indicates common data, the terminal common data transmission process 29 is used to transmit a message (step 105). In the case of indicating the unique data, the terminal unique data transmission process 28 is used to transmit the message only to the terminal to be transmitted (step 10).
6). Determine the end of transmission of all messages (step 10
7). If not completed, the process returns to step 101.

FIG. 15 is a processing flow of the program reception processing 32 of the terminal system 2. First, a telegram is received from the terminal-specific data reception processing 30, the terminal-common data reception processing 31, and the recovery data reception processing 41 (step 201). Data loss is determined from the division serial number in the message (step 202). If data is missing, the program name 402, the version number 401, and the division serial number are reported to the host system 1 using the bidirectional communication line 14 (step 203). If it is normal, the data in the message is stored in the version table (new) 37 and the program database (new) 15 respectively (step 204). The end of reception of all telegrams is determined (step 205). If not, step 20
Return to 1.

When finished, the program database (new) 15 to the program database (old)
The old / new data from the version table (new) 37 to the version table (old) 38 is switched to 16 (step 206). When the terminal system 2 is started up, the program name 402 and version number 401 of the version table (old) 38 are reported to the host system 1 (step 207).

FIG. 16 is a processing flow of the terminal system report acceptance processing 40 of the host system 1. First, a report from the terminal system 2 is accepted (step 301).
The report type is determined (step 302). If data is missing, the program data 502 of the program database 3 is extracted from the reported program name 402, version number 401, and division serial number, the message is edited, and the data is transmitted (step 303). If the program name 402 and the version number 401 are reported, the version number 401 in the version table 25 is compared (step 304). if,
If they do not match, the program transmission process 27 is activated to request the entire program data transmission process. (Step 305).

As described above, in the information communication network system, when downloading from the host system to the terminal system, even if the number of terminal systems is increased, the load on the host system is not increased and the one-way communication line and the two-way communication line are connected. The service stop time due to occupation can be shortened and manpower can be saved.

Further, according to the second embodiment of the present invention, the terminal system which cannot receive all data has the effect of saving the labor by judging the version and automatically downloading it.

[0057]

According to the present invention, if data is transmitted to a one-way communication line, it can be downloaded to a large number of terminal systems without increasing the load on the host system, and data that cannot be received by one-way communication is divided. By determining the serial number and immediately recovering the necessary part from the bidirectional communication line, it is possible to shorten the service stop time due to the occupation of the unidirectional communication line or the bidirectional communication line.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a download control system in an embodiment of an information communication network system of the present invention.

FIG. 2 is an explanatory diagram showing a basic configuration example of an information communication network system of an embodiment of the information communication network system of the present invention.

FIG. 3 is a flowchart of a program transmission process of the host system of the embodiment of the invention.

FIG. 4 is a flowchart of a program receiving process of the terminal system of the above embodiment.

FIG. 5 is a flowchart of a terminal system report acceptance process of the host system of the above embodiment.

FIG. 6 is an explanatory view schematically showing an example of the configuration of a division management table used in the above embodiment.

FIG. 7 is an explanatory diagram schematically showing an example of the configuration of a program database used in the embodiment.

FIG. 8 is an explanatory diagram schematically showing an example of a data message format used when downloading from the host system to the terminal system in the embodiment.

FIG. 9 is an explanatory diagram schematically showing an example of a recovery request message format used when a recovery request is made from the terminal system to the host system in the embodiment.

FIG. 10 is a flowchart showing a communication state between the host system and the terminal system in the above embodiment.

FIG. 11 is an explanatory diagram showing a set state of a data presence / absence flag in the division management table in the above embodiment.

FIG. 12 is a block diagram showing the configuration of a download control method in an information communication network system according to another embodiment of the present invention.

FIG. 13 is an explanatory diagram showing a basic configuration example of an information communication network system according to another embodiment of the present invention.

FIG. 14 is a flowchart of a program transmission process of the host system in the above embodiment.

FIG. 15 is a flowchart of a program receiving process of the terminal system in the above embodiment.

FIG. 16 is a flowchart of a terminal system report acceptance process of the host system of the above embodiment.

FIG. 17 is an explanatory diagram showing the structure of a version table used in the above embodiment.

FIG. 18 is an explanatory diagram showing a configuration of a program database in the above embodiment.

[Explanation of symbols]

1 ... Host system, 2 ... Terminal system, 3 ... Program database, 5 ... Version table, 7 ... Program transmission process, 9 ... Business distribution process, 10 ... Business process, 1
5, 16 ... Program database, 20 ... Recovery data transmission process, 21 ... Recovery data reception process, 60 ... Division management table.

Claims (7)

[Claims] 1. A host system and a plurality of terminal systems, which are a one-way communication line obtained by branching one line from the host system by the number of terminal systems and both directions of the number of terminal systems. Connected by communication line,
In an information communication network system that is always performing service work, a host system includes a program database that stores programs, a program transmission processing unit that performs transmission processing when downloading program data to a terminal system, and a terminal system that receives the program data. Recovery data transmission processing means for performing transmission processing for recovery of unsuccessful data is provided, and the transmission processing means divides the program data into predetermined units and transmits them using a one-way communication line. The recovery data transmission processing means has a function and receives information relating to the program data that cannot be received from the terminal system, reads the portion of the program data indicated by the information from the program database, and outputs the data in both directions. Corresponding through the communication line The terminal system has a function of transmitting the recovery data as recovery data, and the terminal system has a program database for storing the received program and a recovery data reception processing means for receiving the recovery data sent from the recovery data transmission processing means. And a program reception processing unit that receives the program data sent from the program transmission unit and stores the received program data and the recovery data received by the recovery data receiving unit in the program database. The reception processing means has a function of detecting an unreceivable portion in the program data sent from the program transmission means, and the recovery data reception processing means is the program data detected by the program reception processing means. Information indicating a portion that could not be the definitive received, the information communication network system, wherein against the host system has a function of transmitting via the bidirectional communication line. 2. A terminal system connected to a plurality of terminal systems via a one-way communication line and individually connected to each terminal via a two-way communication line, and each terminal system via a one-way communication line. In the host system that performs service business to, for downloading the program database and the program data to the terminal system,
The program transmission processing means performs transmission processing, and the recovery data transmission processing means performs transmission processing for recovery of data that the terminal system could not receive. The program transmission processing means predetermines the program data. The recovery data transmission processing means receives the information about the program data that cannot be received from the terminal system and transmits the information by dividing it into units and using a one-way communication line. A host system having a function of reading out the indicated program data portion from a program database and transmitting it as recovery data to a corresponding terminal system via a two-way communication line. 3. A program database for storing a received program in a terminal system which is connected to a host system via a one-way communication line and a two-way communication line and receives service work from the host system via the one-way communication line. And recovery data reception processing means for receiving the recovery data sent from the recovery data transmission processing means, and program data sent from the host system, and received by the received program data and the recovery data receiving means. And a program reception processing means for storing the recovered data stored in the program database, the program reception processing means having a function of detecting an unreceivable portion in the program data sent from the host system. Yes, recovery day The reception processing means has a function of transmitting, to the host system, a portion of the program data detected by the program reception processing means, which cannot be received, via the two-way communication line. system. 4. The recovery data transmission according to claim 1, wherein the program transmission processing means has a function of dividing the program data and giving a division serial number to each divided portion of the divided program data. The processing means receives information about the program data that could not be received and is sent from the terminal system, reads the part of the program data indicated by the information from the program database in units of divided serial numbers, and sends it to the terminal system. Is an information and communication network system. 5. The terminal system according to claim 4, further comprising: a division serial number management table for setting and managing a flag indicating presence / absence of reception of program data for each division serial number of the program data received from the host system. Yes, the program reception processing means further has a function of detecting the presence or absence of reception for each division serial number in the received program data and setting the result in the division serial number management table. An information communication network system that sends a division serial number to a host system as information indicating a portion of program data that could not be received. 6. The recovery system according to claim 4, wherein the host system further comprises means for managing a version of data, and the program transmission processing means further has a function of attaching data indicating the version. The processing means further comprises a process of receiving a version and a division serial number from the terminal system and determining data required for the terminal system. 7. The information communication network system according to claim 6, further comprising means for managing a version of the received data.