JPH0431454B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to data communication between data terminals, between data terminals and computers, or between computers in a data communication system.

[Conventional technology]

As shown in FIG. 7, in a data communication system in which a device such as a computer 71 and a device such as data terminals 72 and 73 are connected via a public line network 74, the computer 71 and the data terminals 72 and 73 are connected. Conventionally, in the management table 710 of the computer 71, devices 21 to 23 connected to the data terminals 72, 73,
31-33 device addresses A21-A23, A3
1 to B33 are stored in advance, and the attributes of the devices 21 to 23 and 31 to 33 (for example, the type of the device) D21 to D2 are stored in advance in accordance with each device address.
3, D31 to D33 were stored. For example, when sending data from the device 21 of the data terminal 72 to the computer 71, the data terminal 72 sends the information obtained by adding the device address A21 of the device 21 to the data from the device 21 to the computer 71 via the public line network 74.
Send to. When the computer 71 receives this information, it acquires the attribute D21 from the management table 710 using the device address A21 added to the information, and
When sending data to a device 21 that needs to perform processing according to its attributes or pass data to the connected devices 110 and 120 and return a response signal, select the device from the management table 710. Referring to the attribute D21 corresponding to the address A21, the device address A21 of the device 21 is added to the data and the information is sent to the data terminal 72 via the public line network 74.

The above describes communication between computers and data terminals, but the same applies to communication between computers or between data terminals.

[Problem that the invention seeks to solve]

In the conventional data communication method described above, it is necessary to register the destination device address and device attributes in advance in a computer, etc., so if the device address changes, the system will stop due to the change. The need arose. Particularly when devices are frequently connected or deleted, storing and managing device addresses in individual computers or data terminals requires extremely complicated operations, which is not desirable in terms of system operation. Additionally, as the scale of the communication system increases and the number of communication partners increases, the management table that stores the device addresses of the communication partners becomes large in capacity.If containers are restricted, all device addresses must be registered. It becomes difficult to put it on.

The present invention has been made in view of these circumstances, and its purpose is to automatically register a device address without having to register the destination device address in advance, and to reduce the capacity of the management table. The purpose is to provide a method that requires less.

[Means for solving problems]

In order to achieve the above object, the present invention provides an analysis means for analyzing a device address present in received information in a device that communicates data with a device address added to a partner device; reception determining means for determining whether or not a device address to be added to the transmitted data is registered in the management table; transmission determining means for determining whether or not a device address to be added to the transmitted data is registered in the management table; A registration means for registering the device address in the management table when the reception determination means or the transmission determination means determines that the device address is unregistered, and a release means for releasing the device address from the management table at the end of communication are provided.

[Effect]

If the device address present in the received information is not registered in the management table, or if the device address to be added to the transmitted data is not registered in the management table, this is determined by the reception determination means or the transmission determination means, and the registration means automatically registered in the management table by

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a main part of an embodiment of the present invention, showing a configuration provided in a data communication device, for example, a computer 71 in FIG.

This embodiment consists of a communication processing section 1 and an analysis means 2.
, reception determination means 3 , registration means 4 , transmission determination means 5 , release means 6 , and reception data processing section 7
, a transmission data processing section 8 , a communication termination section 9 , and a management table 10 .

In FIG. 1, the information received from the line 11 includes not only the address and data of the other device but also the attributes of the other device. This reception information is acquired by executing a predetermined control means in the communication processing section 1, and when the communication processing section 1 acquires the reception information, it passes this along with control to the analysis means 2.

When the analyzer 2 is given control, it acquires the device address and attributes from the received information, for example as shown in FIG. 2 (S21), and activates the reception determination means 3 (S22).

When activated, the reception determining means 3 determines whether the device address acquired by the analyzing means 2 is registered in the management table 10 (S31), as shown in FIG. For example, the registration means 4 is activated (S32), and then the received data processing section 7 is activated (S33). Furthermore, if the registration has been completed, the received data processing section 7 is immediately activated without activating the registration means 4.

When activated, the registration means 4 performs a process of registering the device address and attributes acquired by the analysis means 2 in the management table 10, as shown in FIG. 4, for example (S41).

On the other hand, when the received data processing section 7 is activated, it searches the management table 10 for the same device address as the device address included in the received information, acquires its attributes, and processes the received data.

Further, in FIG. 1, when data to be transmitted is generated, the transmission data processing section 8 sends the data to the transmission determination means 5.
is started. When activated, the transmission determining means determines whether or not the address of the destination device to which data is to be transmitted (this is given, for example, from the application program) is registered in the management table 10, as shown in FIG. 5, for example. S51), if not registered, the registration means 4 is activated (S52), and then the communication processing unit 1 is activated (S53). In addition, if the registration has been completed, the communication processing unit 1 can be registered without starting the registration means 4.
Start.

When activated, the registration means 4 registers the address of the destination device to which data is to be sent and its attributes (also given by the application program, for example) in the management table 10, as in the case of reception (S41).

On the other hand, when the communication processing section 1 is activated, it transmits to the line 11 information in which the device address registered in the management table 10 and its attributes are added as necessary to the data to be transmitted.

As described above, when reception information is received from a certain device, the address and attributes of the other device are registered in the management table 10, so subsequent transmissions and receptions with that device use the registered device address and attributes. You can do it by doing this.

Additionally, the communication termination section 9 indicates that a series of communications with a certain device has ended or that a line failure has occurred.
When detected, the release means 6 is activated from the communication termination section 9, and the release means 6 deletes the device address stored in the management table 10, as shown in FIG. 6, for example. In other words, the device address is stored in management table 1.
Release from 0. As a result, the erasing area of the management table 10 can be used when communicating with another device next time, and the required capacity of the management table can be reduced.

Note that the automatic device address recognition method in data communication of the present invention is not applied only to the communication method shown in FIG. It is applicable to all systems that require maintenance.

〔Effect of the invention〕

As explained above, according to the present invention, the address of a communication device that performs data communication can be automatically recognized and registered in the management table. There is no need to register the address of the other party in advance, and it is possible to avoid connection failures due to registration errors that occur when registration is done manually. Furthermore, there is no need to stop the system even if the device address changes, etc., and the device address is released from the management table when communication ends, which has the effect of reducing the required capacity of the management table. There is also.

[Brief explanation of drawings]

FIG. 1 is a block diagram of essential parts of an embodiment of the present invention.
Figure 2 is a flowchart showing an example of processing by analysis means 2;
The figure is a flowchart showing an example of processing by the reception determining means 3.
5 is a flowchart showing an example of processing by the registration means 4, FIG. 5 is a flowchart showing an example of processing by the transmission determining means 5, FIG. 6 is a flowchart showing an example of processing by the release means 6, and FIG. 7 is a conventional problem FIG. In the figure, 1 is a communication processing unit, 2 is an analysis means,
3 is a reception determination means, 4 is a registration means, 5 is a transmission determination means, 6 is a release means, 7 is a reception data processing section, 8
1 is a transmission data processing unit, 9 is a communication termination unit, 10 is a management table, and 11 is a line.

Claims (1)

[Scope of Claims] 1. In a device that communicates data with a device address added to it with a partner device, an analysis means for analyzing a device address present in received information, and a device address analyzed by the analysis means. a reception determination means for determining whether or not a device address to be added to the transmission data is registered in the management table; a transmission determination means for determining whether or not a device address to be added to the transmission data is registered in the management table; and the reception determination means or The apparatus is characterized by comprising: a registration means for registering a device address in the management table when the transmission determination means determines that the device address is unregistered; and a release means for releasing the device address from the management table at the end of communication. Automatic device address recognition method in data communications.