JPH0385843A - Terminal communication controller - Google Patents

Abstract

PURPOSE:To improve the communication efficiency by storing a specific data used frequently such as a pattern data of a terminal equipment in advance separately and applying the communication with a code corresponding to the specific data without exchanging the specific data with a host computer on each occasion. CONSTITUTION:When a host computer 1 issues a specific code to read and transfer a data in a data storage section 10, the code is read from a transmission buffer 7 and decoded and the data transfer to a terminal equipment 3 is executed, when the data transfer is finished, a code generating section 15 generates an end code and it is sent to the host computer 1 to inform the end. Thus, the specific data used frequently such as a pattern data of the terminal equipment 3 is stored in advance and the transfer is commanded by the specific code without exchange of data on each occasion. Thus, the load of the host computer 1 and the data transfer bytes between the host computer 1 and a communication controller 2 are relieved to improve the communication efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is used for data transfer between a host computer and a terminal device. The present invention relates to a terminal communication control device that controls communication between a host computer and a terminal device.

〔overview〕

The present invention provides a terminal communication control device that controls data communication between a host computer and a terminal device, in which specific data that is frequently used, such as screen data of the terminal device, is stored separately in advance, and the data is transmitted to the host computer each time. By communicating with a computer using a code corresponding to specific data without exchanging specific data, it reduces the burden on the host computer and the number of data transfer bytes, and increases communication efficiency. .

[Conventional technology]

In conventional terminal communication control devices, data sent and received between the host computer and the terminal device was temporarily stored in a buffer, and the data was retransmitted according to the respective communication procedures of the host computer and the terminal device. Even data such as the input screen of a terminal device that is common to all devices must be transferred between the host computer and the terminal device each time.

[Problem that the invention seeks to solve]

In the conventional terminal communication control device described above, even data that is frequently used in common by terminal devices is transferred to the host computer every time, so it is difficult for many terminal devices to access common data. In this case, as the number of terminal devices waiting to receive or send data increases, the load on the host computer increases.Furthermore, as the amount of common data increases, the communication time between one terminal device and the host computer becomes longer, and the terminal device There is a problem that the waiting time increases further.

The present invention solves these problems, and aims to provide a device that can reduce the burden on the host computer and the waiting time of the terminal device.

[Means for solving problems]

The present invention provides a transmission buffer that is connected between a host computer and a terminal device and temporarily stores transmission data to be transmitted from the host computer to the terminal device, and a transmission buffer that extracts data from the transmission buffer and sends the data to the terminal device. A terminal communication control device comprising a terminal-side transmission circuit for transmitting data via a transfer path, the terminal communication control device comprising a data storage unit in which specific data frequently used in the terminal device is stored in advance, and the data storage unit includes a data storage unit in which specific data frequently used in the terminal device is stored in advance. means for identifying a specific code corresponding to the specific data in data and transmitting the specific data from the data storage section to the terminal-side transmission circuit; and a means for transmitting the specific data by this means. and means for reporting this to the host computer.

[Effect]

When the host computer issues a specific code for reading and transferring data from the data storage section, the code is read from the transmission buffer, interpreted, and the data is transferred to the terminal device. When the data transfer is completed, a completion code is generated and sent to the host computer to notify the host computer of the completion.

In this way, by storing frequently used specific data such as terminal device screen data in advance and instructing the transfer using a specific code instead of exchanging the data each time, the burden on the host computer can be reduced. Also, the number of data transfer bytes between the host computer and the communication control device can be reduced, and communication efficiency can be improved.

Writing specific data to the data storage unit may be performed when the traffic with the host computer is low, such as during startup.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

The figure is a block diagram showing the configuration of an embodiment of the present invention.

The terminal communication control device 2 according to the embodiment of the present invention includes a receiving circuit 6 that is connected between a host computer 1 and a terminal device 3 and receives transmission data from the host computer 1 via a data transfer path 4; A transmission buffer 7 that temporarily stores transmission data from the reception circuit 6;
a terminal-side transmitting circuit 11 that extracts data from the terminal device 3 and transmits it to the terminal device 3 via the data transfer path 5; a terminal-side receiving circuit 12 that receives data from the terminal device 3 via the data transfer path 5; A receiving buffer 13 for temporarily storing data from the side receiving circuit 12, and a transmitting circuit 14 for taking out data from the receiving buffer 13 and transmitting it to the host computer 1 via the data transfer path 4. The system includes a data storage unit 10 in which specific data frequently used in the terminal device 3 is stored in advance, and a specific code corresponding to the specific data is identified in the data stored in the transmission buffer 7. Data storage section 1
A decoding unit 8 and a data storage control unit 9 constitute means for transmitting specific data from 0 to the terminal side transmission circuit 11.
and a code generation unit 15 and an end reporting unit 1 that constitute means for reporting to the host converter 1 that specific data has been transmitted by the decoding unit 8 and data storage unit 9.
6.

The terminal device 3 includes a display and a keyboard, a data transfer path 4 connects the host computer 1 and the terminal communication control device 2, and a data transfer path 5 connects the terminal communication control device 2.
and the terminal device 3 are connected.

The receiving circuit 6 and the transmitting circuit 14 are each connected to the host computer 1, and the terminal side transmitting circuit 11 and the terminal side receiving circuit 12 are each connected to the terminal device 3.

The transmission buffer 7 temporarily stores data sent from the host computer 1 until it is output to the terminal-side transmission circuit 11 in the reception circuit 6 . The decoding section 8 is the transmission buffer 7
Decode specific codes in data stored in . The data storage control section 9 performs read/write access to the data storage section 10 based on the output of the decoding section 8 . In the data storage section 0, the host computer 1 is the terminal device 3.
This is an area in which data commonly used by many terminal devices 3 is stored in advance among the data transferred to the terminal device 3.

The code generation unit (5) generates a code indicating the end of data transfer when data is sent from the data storage unit 10 to the terminal device 3 using a specific code from the host computer 1. At the time of termination, the end code generated by the code generation unit 15 is notified to the host computer 1.The reception buffer 13 outputs the data received from the terminal device 3 by the terminal side reception circuit 12 to the transmission circuit 14.

Next, the operation of the embodiment of the present invention configured as described above will be explained.

First, the operation of writing specific data into the data storage unit 10 in advance will be explained. In order to write common data used by the terminal device 3 from the host computer 1 into the data storage section 10 in advance, the host computer 1 outputs a specific code for data writing to the data storage section 10.

The code written in the transmission buffer 7 is decoded by the decoding section 8, and the data following the code is written into the data storage section IO by the data storage control section 9.

Next, the operation of transferring specific data to a terminal during operation will be explained. The host computer 1 issues a specific code to read and access the data storage section 10. The code is interpreted by the decoding section 8, the data storage section 10 is read out by the data storage control section 9, and the data is transferred to the terminal device 3.

Also, at this time, the output signal of the data storage control section 9 is sent to the code generation section 15. When the data transfer from the host computer 1 is completed, the code generator 15 generates an end code to report the end of the data transfer to the host computer 1, and the end code is sent to the host computer 1 via the end report section 16 and the transmission circuit 14. , the host computer 1 recognizes the end of data transfer.

In order to increase the number of times the data storage section 10 is accessed, its capacity is increased and the number of storage sections is increased, thereby making it possible to shorten the data transfer time between one terminal device 3 and the host computer 1.

In addition, when a plurality of terminal devices 3 are connected under the host computer 1, if the data storage control section 9 and the code generation section 15 are prepared in the same number as the terminal devices 3, the host computer 1
It is possible to report the completion of data transfer to each terminal device.
Enables more efficient operation.

〔Effect of the invention〕

As explained above, according to the present invention, data that is frequently sent from a host computer is stored in advance and transferred to and from the host computer using a specific code, thereby reducing the burden on the host computer and the number of data transfer bytes. This has the effect of increasing the efficiency of communication between the host converter and the terminal communication control device, and ultimately the communication efficiency between the terminal device and the host converter.

[Brief explanation of drawings]

The figure is a block diagram showing the configuration of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Host computer, 2... Terminal communication control device, 3... Terminal device, 4.5... Data transfer path, 6
. . . Receiving circuit, 7 . . . Transmission buffer, 8 . Terminal side reception circuit, 13... Reception buffer, 14... Transmission circuit, 15... Code generation section, 16... Completion reporting section, 2.'':, No example

Claims (1)

[Scope of Claims] 1. A transmission buffer connected between a host computer and a terminal device for temporarily storing transmission data to be transmitted from the host computer to the terminal device; A terminal communication control device comprising a terminal-side transmission circuit that transmits data to a terminal device via a data transfer path, comprising a data storage section in which specific data frequently used in the terminal device is stored in advance, and the transmission buffer means for identifying a specific code corresponding to the specific data in the data stored in the data storage unit and transmitting the specific data from the data storage unit to the terminal-side transmission circuit; A terminal communication control device comprising means for reporting to the host computer that a message has been transmitted.