JPH0581160A - Data communication system - Google Patents

Abstract

PURPOSE:To eliminate the waste that a host computer has excess constitution information even when a connection is performed with an unspecific terminal station. CONSTITUTION:A host computer 1 is connected to a terminal station 3 via a public communication network 2. The host computer 1 has a constitution discrimination means 11 discriminating the content of the constitution information from the terminal station 3, a constitution information storage means 12 storing the information discriminated by the constitution disclimination means 11, an application program 15 for performing a data communication with the terminal station 3, a constitution information conversion means 13 logically performing a conversion between an identifier and the constitution information of the terminal station which are treated by the application program 15 and a data communication means 14 performing data communication using the constitution information converted by the terminal station 3 and the constitution information conversion means 13. The terminal station 3 has a work station 31 and a printer 32 under its control and has a constitution information notification means 33 notifying the constitution information to the host computer 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication system connected to an unspecified number of terminal stations via a public communication network.

[0002]

2. Description of the Related Art Conventionally, this type of data communication system has been
If the configuration of the terminal station is known in advance, whether it has configuration information by dividing the communication line for each pattern, has configuration information of the maximum configuration that can be connected, or gives an identifier to the terminal station, Prepare configuration information for each identifier,
At the time of connection, the identifier of the terminal station is passed and the configuration information of the terminal station is obtained by using the method of extracting the corresponding configuration information.

[0003]

The above-described conventional data communication system has a drawback that extra memory is required due to having unnecessary configuration information, and a limit arises that a connectable line is limited by a terminal station. there were.

[0004]

In a data communication system of the present invention, in a host computer, a configuration identifying means for identifying a terminal configuration and information identified by the configuration identifying means are logically associated with an identifier. Identification information storage means for storing the information, an application program accessed by using the logical identifier, an information conversion means for converting the logical identifier designated by the application program into the configuration information for the terminal, and the configuration conversion means It has a data communication means for transmitting and receiving data using the configuration information, and the terminal station has a configuration information notification means for notifying the configuration information of its own station. Configuration information for the host computer
The configuration information notifying means is used for the notification, and the host computer performs the data communication with the terminal station based on the notified configuration information.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.
The host computer 1 is a terminal station 3 via a public communication network 2.
Connected with. Terminal station 3 in host computer 1
A configuration identifying means 11 for identifying the content of the configuration information from
The configuration information storage unit 12 that stores the information identified by the configuration identification unit 11, the application program 15 for performing data communication with the terminal station 3, the logical identifier handled by the application program 15, and the configuration information of the terminal station 3. It has a conversion means 13 for converting the configuration information for converting between the two, and a data communication means 14 for performing data communication using the configuration information converted by the terminal station 3 and the configuration information conversion means 13.

On the other hand, the terminal station 3 is a workstation 31.
And a printer 32 as a subordinate, and a configuration information notifying unit 33 for notifying the host computer 1 of the configuration information.

The flow between the processing means will be described with reference to FIG.

When making a call from the terminal station 3, the terminal station 3 requests the public communication network 2 to make a call 40. When the host computer 1 accepts an incoming call, the public communication network 2 responds to the public communication network 2 with an incoming call acceptance 42, and the public communication network 2 notifies the terminal station 3 of a call completion 43. By this series of operations, the line is connected.

The configuration information notifying means 33 in the terminal station 3 transmits the configuration information 44 to the configuration identifying means 11 in the host computer 1 when the line is connected. The received configuration information 44 in the host computer 1 is passed to the configuration identification means 11.

The configuration identifying means 11 receives the received configuration information 4
4, the correspondence information between the configuration information of the terminal station 3 and the logical identifier used by the application program (see FIG.
Is generated, the configuration information set 45 is stored in the configuration information storage means 12, and the correspondence information described above is stored in the configuration information storage means 12. At the same time, the configuration identifying means 11 notifies the configuration information changing means 13 of a connection terminal configuration information set notification 46 in order to notify that the configuration information of the connected terminal station 3 is stored in the configuration information storage means 12.

Upon receiving the connection terminal configuration information set notification 46, the configuration information conversion means 13 issues an information reference 47 to the configuration information storage means 12 to obtain the configuration information of the connected terminal station 3, and The information storage means 12 returns an information notification 48 as its response. The configuration information conversion unit 13 converts the configuration of the connected terminal station 3 into a logical identifier used by the application program 15 based on the configuration information from the configuration information storage unit 12, and notifies the application program 15 of it. In order to notify the connected terminal 49
I do.

When data is transmitted from the application program 15 to the printer 32 of the terminal station 3, the data transmission 50 is issued from the application program 15. The configuration information conversion unit 13 performs information reference 51 to the configuration information storage unit 12 in order to convert the logical identifier used by the application program 15, receives the information notification 52 from the configuration information storage unit 12, The data transmission 53 is received by the data communication unit 14, and the data transmission 53 is performed by the data communication unit 14. The data communication means 14 is a printer 32 under the terminal station 3.
The data 54 is transmitted to.

From the workstation 31 under the terminal station 3 to the application program 1 of the host computer 1.
When data is transmitted to the computer 5, data 55 is transmitted from the workstation 31 to the host computer 1. When the data communication unit 14 receives the data 55, it notifies the configuration information conversion unit 13 of the data reception 56.

The configuration information conversion means 13 issues an information reference 57 to the configuration information storage means 12 to notify the information 5
8 is obtained and converted into a logical identifier used by the application program 15, and then the data reception 59 is notified to the application program 15.

An example of the configuration of the configuration information stored in the configuration information storage means 12 is shown in FIG. The configuration information storage means 12 thus stores the logical identifier used by the application program 15 and the physical address used on the line as a pair.

FIG. 4 shows an example of the data format of the configuration information, which is an example in which the code and the physical address of the device having the configuration are transmitted as a pair.

[0018]

As described above, since the present invention receives the configuration information from the terminal station when connecting to the public communication network, the host computer has extra configuration information even when connecting to an unspecified terminal station. There is an effect that unnecessary resources can be eliminated without necessity.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a flow between processing units of the present invention.

FIG. 3 is a diagram showing a configuration example of correspondence information stored in a configuration information storage means 12 in the present invention.

FIG. 4 is a diagram showing an example of a data format of terminal station configuration information.

[Explanation of symbols]

 1 Host Computer 2 Public Communication Network 3 Terminal Station 11 Configuration Identification Means 12 Configuration Information Storage Means 13 Configuration Information Conversion Means 14 Data Communication Means 15 Application Programs 31 Workstations 32 Printers 33 Configuration Information Notification Means

Claims (1)

[Claims] 1. In a data communication system having a host computer connected to one or more terminal stations via a public communication network, a configuration identifying means for identifying a terminal configuration in the host computer, and a configuration identifying means. Identification information storing means for storing information identified by the above in association with a logical identifier, an application program for accessing using the logical identifier, and a logical identifier specified by the application program for the terminal. And a data communication means for transmitting and receiving data using the configuration information converted by the configuration information conversion means, and a configuration for notifying the terminal station of the configuration information of its own station. It has an information notification means, and when the line is connected, the terminal station sends the configuration information of its own station to the host computer. A data communication system, characterized in that notification is made by using a composition information notification means, and the host computer performs data communication with the terminal station based on the notified configuration information.