JPH06276309A - Data communication system - Google Patents

Abstract

PURPOSE:To obtain the communication system discriminating a traffic state of a line of each terminal equipment so as to revise automatically a dialing destination order information table of each terminal equipment. CONSTITUTION:Each of plural terminal equipments 2-1, 2-2, 2-3,..., 2-n stores a dialing destination order information table 5 registering a connection request order of communication controllers 3-1, 3-2, 3-3,... 3-m making dialing in the case of data communication with a host computer 4 and line traffic correlation data such as number of times of line connection request of a line for each communication controller. Moreover, each of the terminal equipments 2-1, 2-2, 2-3,..., 2-n is provided with a means sending the line traffic correlation data to the host computer. Furthermore, a host computer 4 is provided with a means deciding dialing destination order information decreasing a traffic for each terminal equipment based on the sent line traffic quantity correlation data. Moreover, each of the terminal equipments 2-1, 2-2, 2-3,..., 2-n receives the dialing destination order information from the host computer to update the dialing destination order information table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a data communication system for communicating between a plurality of terminal devices such as ATM and CD and a host computer via a public line network.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing the structure of a data communication system. The data communication system includes a plurality of terminal devices 12-1 and 12- connected to the telephone line 1 such as ATM and CD.
2, 12-3, ..., 12-n and the plurality of terminal devices 12-1, 12-2, 12-3 ,.
The host computer 14 is provided for data communication with 12-n. Further, a plurality of communication controllers 13 that control data communication between the host computer 14 and each terminal device.
, 13-2, 13-3, ..., 13-m are provided between the telephone line 11 and the host computer 14. A plurality of communication controllers 13-1, 13-2, 13-3, ..., 1
Each 3-m has a line number. However, the number of terminal devices is more than the number of communication controllers (n ≧ m
).

Such a data communication system including ATM, CD, etc. performs data communication with the host computer 14 every time an input operation is performed on each terminal device, and processes input from the terminal device. Also, each terminal device stores a dialing destination order information table 15 for registering the order of the number (line number of communication controller: dialing destination) for requesting connection of a line when performing data communication with the host computer 14. I have it.

For example, when an input operation is performed on the terminal device 12-1, the terminal device 12-1 performs data communication with the host computer 14, so that the line is connected to the communication controller according to the dialing destination order information table 15. Make a request. For example, it is assumed that the dialing destination order information table 15 shown in FIG. 5 is registered in the terminal device 12-1. The terminal device 12-1 is the communication controller 13-1 first.
Make a line connection request to. When the line between the terminal device 12-1 and the communication controller 13-1 is connected, the terminal device 12-1
Performs data communication with the host computer 14 via the telephone line 11 and the communication controller 13-1 and processes input.

On the other hand, when the line with the communication controller 13-1 is not connected to the terminal device 12-1 (the line is connected with the other terminal device with the communication controller 13-1), the communication controller 13- Make a line connection request to 2.
That is, the terminal device 12-1 requests each communication controller to connect a line according to the order registered in the dialing destination order information table 15. And the terminal device 1
2-1 performs data communication with the host computer 14 when a line with any communication controller is connected.

[0006]

However, in the conventional data communication system, the dialing destination order information table for registering the order in which the terminal device makes a line connection request to each communication controller is stored in all the terminal devices. Generally registered with the same contents. In such a case, all the terminal devices make line connection requests under the same conditions, and thus lines with high priority tend to be busy. For this reason, in many cases, the terminal device is repeatedly connected to a line with a communication controller having a low priority by repeatedly making a line connection request.
Therefore, the terminal device increases the number of line connection requests made before the line is connected to any one of the communication controllers. Therefore, it takes a long time from the start of the input operation on the terminal device until the line with any one of the communication controllers is connected, and the processing time from the start of the input operation on the terminal device to the completion of the processing becomes long. was there.

Further, since the processing time for one time becomes long,
At the same time, the number of terminal devices requesting connection of a line with the communication controller increases. For this reason, the terminal device has a drawback that the line with the communication controller cannot be connected, the process is canceled due to retry over after the line connection request is made a certain number of times.

An object of the present invention is to provide a data communication system which judges the traffic condition of a line and automatically changes the dialing destination order information table of each terminal device.

[0009]

According to the data communication system of the present invention as set forth in claim 1, the order of the communication controller for requesting connection of lines is registered as dialing destination order information in a plurality of terminal devices. A dialing destination order information table, a traffic status storage means for storing, for each communication controller, traffic volume correlation data of the circuit such as the connection time of the circuit and the number of retries for requesting the circuit connection, and the traffic status storage means. Traffic status data transfer means for transmitting the traffic amount correlation data of the line to the host computer, and based on the line traffic amount correlation data transmitted from the plurality of terminal devices to the host computer. Dialing destination order information that reduces the traffic volume for each terminal device And dialing destination order information determining means for transmitting the dialing destination order information to each terminal device and further updating the dialing destination order information table in the terminal device according to the dialing destination order information received from the host computer. It is characterized in that it is provided with first-order information updating means.

According to another aspect of the data communication system of the present invention, a dialing-destination-order information table in which the order of the communication controllers that make line connection requests is registered as dialing-destination order information in a plurality of terminal devices. Traffic status storage means for storing, for each terminal device, traffic volume correlation data of the line, such as the connection time of the line with the terminal device and the number of retries for requesting the line connection from the terminal device in the communication controller. And traffic status data transfer means for transferring the traffic amount correlation data stored in the traffic status storage means to the host computer, and the line transferred to the host computer by the traffic status data transfer means. Based on the traffic volume correlation data of each terminal device A dialing destination order information determining unit for determining dialing destination ordering information for reducing the amount of Fick and transmitting the dialing destination ordering information to each terminal device, and further, the terminal device dialing according to the dialing destination ordering information received from the host computer. A dialing destination order information updating means for updating the destination order information table is provided.

In the data communication system according to the third aspect of the present invention, the dialing destination order information table in which the order of the communication controllers that make line connection requests is registered as dialing destination order information in a plurality of terminal devices. And traffic status storage means for storing traffic quantity correlation data such as the connection time of the line and the number of retries for requesting the connection of the line, and the traffic quantity correlation data stored in the traffic status storage means, and the traffic quantity is monitored. Is increased by a predetermined amount, the dialing destination order information updating means is provided for switching and updating the order of the communication controllers registered in the dialing destination order information table.

[0012]

In the data communication system of the present invention as set forth in claim 1, the terminal device registers the order of the communication controllers which make the line connection request in the dialing destination order information table. In addition, the terminal device stores the traffic amount correlation data of the line such as the connection time of the line and the number of retries for requesting the connection of the line in the traffic status storage means for each communication controller, and is stored in the traffic status storage means. It sends the traffic volume correlation data of the connected line to the host computer.

Then, the host computer aggregates and analyzes the traffic amount correlation data of the lines transmitted from the plurality of terminal devices, and determines dialing destination order information for reducing the traffic amount for each terminal device. At this time, the dialing destination order information is most desirably determined as a combination of the dialing destination order information for each terminal device such that the line connection time from each terminal device is minimized. Further, the terminal device receives the dialing destination order information from the host computer and updates the dialing destination order information table.

In the data communication system according to the second aspect of the present invention, the terminal device registers in the dialing destination order information table the order of the communication controllers making the line connection requests. Further, the communication controller stores the traffic amount correlation data of the line such as the connection time and the number of times of the line with the terminal device in the traffic status storage means for each terminal device. Then, the communication controller transfers the traffic volume correlation data stored in the traffic status storage means to the host computer at the time when it is registered in advance.

Then, the host computer determines dialing destination order information for each terminal device based on the traffic amount correlation data of the line transferred from the communication controller. At this time, the dialing destination order information is most desirably determined as a combination of the dialing destination order information for each terminal device such that the line connection time from each terminal device is minimized.

Further, the terminal device receives the dialing destination order information from the host computer and updates the dialing destination order information table.

In the data communication system according to the third aspect of the present invention, the terminal device registers in the dialing destination order information table the order of the communication controllers making the line connection requests. Further, the terminal device stores the traffic amount correlation data of the line such as the number of retries for requesting the connection of the line to each communication controller of the traffic status storage means. Then, the terminal device determines the order of each communication controller registered in the dialing destination order information table by the traffic amount correlation data stored in the traffic status storage means when the number of retries and the like increases within a certain time. Replace and update. At this time, as the dialing destination order information, it is most desirable to determine the dialing destination order information that minimizes the line connection time.

[0018]

1 shows a data communication system which is an embodiment of the present invention described in claim 1. In FIG. The data communication system includes a plurality of terminal devices 2-1, 2-2, 2-3, ..., 2-n such as ATM and CD connected to the telephone line 1 and the telephone line 1.
Through the plurality of terminal devices 2-1, 2-2, 2-3, ...
A host computer 4 for performing data communication with 2-n is provided. Also, a plurality of communication controllers 3-1 for controlling data communication between the host computer 4 and each terminal device,
3-2, 3-3, ..., 3-m are provided between the telephone line 1 and the host computer 4. Each of the plurality of communication controllers 3-1, 3-2, 3-3, ..., 3-m has a line number.

Such a data communication system including ATM, CD, etc. performs data communication with the host computer 14 each time an input operation is performed on each terminal device, and processes input from the terminal device. Further, each terminal device is provided with a dialing destination order information table 5 for registering, as dialing destination order information, the order in which a line connection request is issued to each communication controller when performing data communication with the host computer 14. .

Each terminal device 2-1, 2-2, 2-3, ..., 2
-n is the line connection request data, and the number of times that it has made a line connection request to each communication controller 3-1, 3-2, 3-3, ..., 3-m, and the line is actually connected. Correlation with the amount of traffic on the line, such as the number of times the process was performed, the average time it took to connect the line with one of the communication controllers, and the number of times the process was canceled because the line could not be connected due to retry over. Traffic volume correlation data (traffic data) TD-1, TD-2, TD-3, ...
・, TD-n is stored for each time zone.

Then, each terminal device 2-1, 2-2, 2-3 ,.
.. 2-n requests the communication controller 3-1 to connect the line via the telephone line 1 at a certain time (a time registered in advance in the terminal device). Each terminal device transmits the traffic data TD-1, TD-2, TD-3, ..., TD-n to the host computer 4 when the line with the communication controller 3-1 is connected.

The host computer 4 receives the traffic data TD-1 and TD- transmitted from all the terminal devices.
2, TD-3, ..., TD-n are aggregated and analyzed, and each terminal device 2-1, 2-2, 2-3, ..., 2-n is required to connect the line with the communication controller. Dialing destination order information DD-1, DD-2, DD- for each terminal device so as to minimize the time.
3, ..., The combination of DD-n is determined.

For example, each communication controller 3-1, 3-2,
Each terminal device 2-1, 2-2, 3-3, ...
2-3 ..., 2-n dialing destination order information DD-1,
DD-2, DD-3, ..., DD-n are determined.

Then, the host computer 4 sends the dialing destination order information DD-1, DD-2, DD as the result.
-3, ..., DD-n are transmitted for each terminal device 2-1, 2-2, 2-3, ..., 2-n via the communication controller 3-1. This transmitted dialing destination order information DD-
Each of the terminal devices 2-1, 2-2, 2-3, ..., 2-n receiving 1, DD-2, DD-3, ..., DD-n is a dialing destination order information table. The dialing destination order information table is updated by overwriting the received dialing destination order information.

As a result, each terminal device can automatically update the dialing destination order information table. After that, each of the terminal devices 2-1, 2-2, 2-3, ..., 2-n follows each communication controller according to the order of the dialing destination order information table until the dialing destination order information table is updated. 3-1, 3-2, 3-3, ..., 3-m request a line connection.

FIG. 2 is a diagram showing simulation results. FIG. 2A is a diagram showing a simulation result in the data communication system according to the embodiment of the present invention.
FIG. 2B is a diagram showing a simulation result in a conventional communication system for comparison. In the simulation, three arbitrary terminal devices were selected, and the communication controllers connected to the host computer were x, y, and z.

The number of processing occurrences of each terminal device a, b, c is
The terminal device a is 100 times, the terminal device b is 50 times, and the terminal device c is 80 times. The result of the simulation is compared with the terminal device a. In the conventional system, the number of processing occurrences is 1
The number of line connection requests for which a line connection request was made for 00 times is 475, whereas the number of line connection requests for which a line connection request is made is reduced to 160 in this embodiment. Also, the average line connection time required from the start of the input operation on the terminal device until the line with any communication controller is connected is shortened from 31 s to 21.75 s.

This makes it possible to shorten the time from the start of processing to the end of processing at the terminal device. Furthermore, the number of processing cancellations that were canceled due to over-retry is:
It occurred 10 times in the conventional system, but it did not occur in this embodiment. Similar effects are exhibited in the terminal devices b and c.

Next, an embodiment of the invention described in claim 2 will be described. FIG. 3 is a diagram showing a data communication system according to the same embodiment. Each communication controller 3-1, 3-2, 3
-3, ..., 3-m are terminal devices 2-1, 2-2, 2-3, ...
The traffic data TD-1, TD-2, TD-3, ..., TD-m such as the time when the line for 2-n is connected is stored. Then, each communication controller 3-1 and 3-
2, 3-3, ..., 3-m, the traffic data TD-1, TD-2, TD-3, ..., At a certain time (time previously registered in the communication controller) The TD-m is transmitted to the host computer 4.

The host computer 4 receives the traffic data TD- transmitted from all communication controllers.
1, TD-2, TD-3, ..., TD-m are aggregated and analyzed, and each terminal device 2-1, 2-2, 2-3 ,. Dialing order information DD-1 and DD- for each terminal device so as to minimize the time required to connect
2, the combination of DD-3, ..., DD-n is determined.

For example, each communication controller 3-1, 3-2,
Each terminal device 2-1, 2-2, 3-3, ...
2-3 ..., 2-n dialing destination order information DD-1,
DD-2, DD-3, ..., DD-n are determined.

The host computer 4 then sends the resulting dialing destination order information DD-1, DD-2, DD.
-3, ..., DD-n are transmitted for each terminal device 2-1, 2-2, 2-3, ..., 2-n via the communication controller 3-1. This transmitted dialing destination order information DD-
Each of the terminal devices 2-1, 2-2, 2-3, ..., 2-n receiving 1, DD-2, DD-3, ..., DD-n is a dialing destination order information table. The dialing destination order information table is updated by overwriting the received dialing destination order information.

Thus, each terminal device can automatically update the dialing destination order information table. Thereafter, each of the terminal devices 2-1, 2-2, 2-3, ..., 2-n follows the order of this dialing destination order information table until its own dialing destination order information table is updated. Request connection of the line to the communication controllers 3-1, 3-2, 3-3, ..., 3-m.

Next, an embodiment of the invention described in claim 3 will be described with reference to FIG. Each terminal device 2-1, 2-2, 2-3,
... 2-n are communication controllers 3-1, 3-2, 3-
Traffic data for 3, ..., 3-m is stored. Then, each terminal device 2-1, 2-2, 2-3, ...
-2-n is the dialing destination order information table when the average time for line connection, the number of retries, or the number of processing cancellations exceeds a reference value (value registered in the terminal device in advance) within a certain time. Dialing destination order information DD-1, DD-2,
Change DD-3, ..., DD-n. For example, the dialing destination order information DD-1, DD-2, DD- can be set by increasing the priority of the communication controller that is frequently connected to the line.
3, ..., DD-n is determined. As a result, each terminal device can automatically update the dialing destination order information table. After that, each terminal device 2-1, 2-2, 2-3,
... 2-n are in accordance with the order of the dialing destination order information table until the dialing destination order information table is updated. Each communication controller 3-1, 3-2, 3-3, ...
・ Request a line connection to 3-m.

When determining the dialing destination order information based on this traffic data, the communication cost from each terminal device to each dialing destination may be taken into consideration.

[0036]

As described above, according to the present invention, it is possible to automatically change the priority order of dialing destinations according to the traffic condition of the line, so that the traffic amount of the line to each communication controller can be distributed. , The average time required to connect the line can be shortened. As a result, the time from the start of the input operation on the terminal device to the completion of the processing can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram showing a data communication system which is an embodiment of the present invention described in claim 1.

FIG. 2 is a diagram showing a simulation result according to the example.

FIG. 3 is a diagram showing a data communication system which is an embodiment of the present invention described in claim 2;

FIG. 4 is a diagram showing a data communication system which is an embodiment of the present invention described in claim 3;

FIG. 5 is a diagram showing a conventional data communication system.

[Explanation of symbols]

 1, 11-telephone line 2-1, 2-2, 2-3, ..., 2-n-terminal device 3-1, 3-2, 3-3, ..., 3-m-communication controller 4-Host computer 5-Dialing order information table

Claims (3)

[Claims] 1. A plurality of terminal devices for inputting data, a host computer performing data communication with the plurality of terminal devices via a public line network or a network, and the plurality of terminal devices and a host computer. And a plurality of communication controllers for controlling the data communication of the above, and when performing data communication between the host computer and each terminal device, a data communication system for making a line connection request from the terminal device to the communication controller. , A dialing destination order information table in which the order of the communication controllers that make line connection requests to the plurality of terminal devices is registered as dialing destination order information, and the line connection time and the number of retries for which a line connection request is made Traffic status that stores the traffic volume correlation data of each communication controller for each communication controller Storage means, and traffic status data transfer means for sending out the traffic volume correlation data of the line stored in the traffic status storage means to the host computer, and transmitting to the host computer from the plurality of terminal devices. A dialing destination order information determining unit for determining dialing destination order information for reducing the traffic amount for each terminal device based on the received traffic amount correlation data of the line, and transmitting the dialing destination order information to each terminal device; A data communication system characterized in that the device is provided with dialing destination order information updating means for updating a dialing destination order information table in accordance with the dialing destination order information received from the host computer. 2. A plurality of terminal devices for inputting data, a host computer for performing data communication with the plurality of terminal devices via a public line network or a network, and the plurality of terminal devices and a host computer. And a plurality of communication controllers for controlling the data communication of the above, and when performing data communication between the host computer and each terminal device, a data communication system for making a line connection request from the terminal device to the communication controller. , A dialing destination order information table for registering the order of the communication controller that makes a line connection request as dialing destination order information in the plurality of terminal devices, and the communication controller is provided with a dialing destination order information table. Line traffic volume such as connection time and number of retries for requesting line connection from the terminal device Traffic condition storage means for storing function data for each terminal device, and traffic status data transfer means for transferring the traffic amount correlation data stored in the traffic status storage means to a host computer. Further, the dialing destination order information for reducing the traffic amount for each terminal device is determined based on the traffic amount correlation data of the line transferred by the traffic status data transfer means, and the dialing destination order to be transmitted to each terminal device is determined. Data communication characterized by comprising information determining means, and further comprising the dialing destination order information updating means for updating the dialing destination order information table according to the dialing destination order information received from the host computer in the terminal device. system. 3. A plurality of terminal devices for inputting data, a host computer performing data communication with the plurality of terminal devices via a public line network or a network, and the plurality of terminal devices and a host computer. And a plurality of communication controllers for controlling the data communication of the above, and when performing data communication between the host computer and each terminal device, a data communication system for making a line connection request from the terminal device to the communication controller. , A dialing destination order information table in which the order of the communication controller that makes a connection request for a line is registered in the plurality of terminal devices as dialing destination order information, and a connection time of the line and a retry requesting the connection of the line are made. Traffic status storage means for storing the traffic volume correlation data such as the number of times, Dialing for monitoring the traffic amount correlation data stored in the traffic condition storage means, and when the traffic amount increases by a predetermined amount, the order of each communication controller registered in the dialing destination order information table is replaced and updated. A data communication system, comprising: first-order information updating means.