JPS63292740A - Terminal control system - Google Patents

Abstract

PURPOSE:To extend a terminal equipment at an optional point of time by providing a multiple address frame transmission means on a terminal equipment and a multiple address reception means, an analysis means, a generating means and a communication start means on a host computer. CONSTITUTION:A terminal equipment 3 and a host computer 8 are connected by a line branching device 9. The information required to be connected to the host computer 8 is sent to a multiple address frame transmission means 1 at the terminal equipment 3 and received by a multiple address frame reception means 4 of the host computer 8. The terminal information is analyzed by an analysis means 5 and the communication information with the terminal equipment 3 on the host computer 8 by a generating means 6, a communication processing means 2 is started by the communication start means 7 receiving the communication information to complete the host computer 8 and the terminal equipment 3. Thus, it is not required to prepare in advance the information of all terminal equipments connected to the host computer and the terminal equipment is extended at an optional point of time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applied to a terminal control method for connecting a host computer and a terminal in a data communication system.

〔overview〕

In a terminal control system having communication processing means for transmitting data using broadcast frames, the terminal includes broadcast frame transmission means, and the host computer includes broadcast frame reception means, analysis means, creation means, and communication activation means. This eliminates the need to prepare information for all terminals connected to the re-host computer, allows you to add terminals at any time, eliminates the need to monitor responses, and eliminates the error message of timeout while waiting for a response.・Eliminate noise and host・
This is designed to reduce the load on the computer.

[Conventional technology]

Conventionally, when connecting a host computer and a terminal, the communication information required by all the terminals to be connected is stored on the host computer in advance, and the data is sent from the host computer to all the terminals. I was monitoring the response.

[Problem that the invention seeks to solve]

In the conventional connection between a host computer and a terminal, the communication information required by all the terminals to be connected is developed on the host computer in advance, and when the connection is made, data is sent from the host computer to all the terminals for communication. Because the information is used, it is not possible to change the communication information of individual terminals or add terminals at any time.

In addition, data is sent from the host computer to all terminals, and in order to monitor responses, error messages for unresponsive terminals from unconnected terminals are output to the host computer, and responses from unconnected terminals are constantly monitored. The disadvantage is that it places an unnecessary load on the host computer.

[Means for solving problems]

The present invention comprises a host computer and one or more terminals connected to the host computer via a line, the host computer is equipped with communication processing means for transmitting data, and the terminal In a terminal control method comprising a means for transmitting terminal information necessary for connection to the host computer, the terminal is provided with a broadcast frame for transmitting terminal information necessary for connection to the host computer in the form of a broadcast frame. The host computer includes a broadcast frame receiving means for receiving a broadcast frame sent from the terminal, an analysis means for analyzing terminal information from the received broadcast frame, and an analysis means for analyzing terminal information from the received broadcast frame. The present invention is characterized by comprising a creation means for creating communication information with the terminal on the host computer from the terminal information, and a communication activation means for starting the communication processing means based on the communication information with the terminal.

[Effect]

In the terminal control system of the present invention, information necessary for connection with a host computer is transmitted by a broadcast frame transmitting means of the terminal, and is received by a broadcast frame receiving means of the host computer. The terminal information is analyzed by the analysis means, the creation means creates communication information with the terminal on the host computer, and the communication activation means that receives this communication information starts the communication processing means to communicate between the host computer and the terminal. Complete the connection. In the present invention, it is not necessary to prepare in advance information on all terminals to be connected to the host computer, and therefore terminals can be added at any time. In connection between a host computer and a terminal, it is not necessary to monitor responses to data transmission from the host computer to all terminals; it is only necessary to monitor the flow of broadcast frames on the line.

Additionally, since data is not sent from the host computer to unconnected terminals, timeout error messages can be eliminated when waiting for a response to send data to unconnected terminals, and there is no need to be aware of unconnected terminals during communication processing. This has the effect of reducing the load placed on the host computer due to the

〔Example〕

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

FIG. 1 is a block diagram showing the configuration of a terminal control system according to an embodiment of the present invention. In the embodiment of the present invention, a terminal 3 equipped with a broadcast frame transmitting means l and a communication processing means 2 is connected to a broadcast frame receiving means 4. , analysis means 5, creation means 6, and communication activation means 7
and a communication processing means 2.
are connected by a line branching device 9.

Each of the above means is constructed by a software program.

FIG. 2 shows the format of a communication frame used in the embodiment of the present invention, and this communication frame 21 is composed of a partner station address field 22, a local station address field 23, and a data field 24. .

Furthermore, this communication frame 21 in which a broadcast address is set in the partner station address field 22 is distinguished as a broadcast frame, and in the case of a broadcast frame in the present invention, terminal information is set in the data field. A terminal identifier, communication procedure identifier, etc. are sent.

Next, the operation of the present invention will be explained with reference to the drawings.

First, the host computer 8 activates the broadcast frame receiving means 4 and makes it ready to receive broadcast frames from the terminal 3.

In this state, when the broadcast frame transmission means 1 is activated to transmit a broadcast frame in which terminal information including the terminal address, terminal identifier, communication procedure identifier, etc. necessary for connection with the host computer 8 is set from the terminal 3, The host computer 8 receives the broadcast frame sent from the terminal 3 by the broadcast frame receiving means 4.

When the broadcast frame is received by the broadcast frame receiving means 4, the broadcast frame receiving means 4 activates the analysis means 5 which analyzes terminal information from the received broadcast frame. The analysis means 5 analyzes the broadcast frame and outputs information necessary for communication from the data field. That is, the host
Terminal information such as a terminal address, terminal identifier, and communication procedure identifier for connecting the computer 8 and the terminal 3 is extracted from the broadcast frame.

Based on this terminal information, the analysis means 5 activates the creation means 6 that creates communication information with the terminal 3, and this creation means 6
creates a table corresponding to the terminal from the communication information necessary for communication with the terminal 3 on the host computer 8 based on the terminal information. After the communication information is created, the creation means 6 activates the communication activation means 7 which activates the communication processing means 2 which actually performs data transmission between the host computer 8 and the terminal 3. A start signal is sent to the system to start up the conventionally used communication processing means 2, and thereafter data transmission is performed between the host computer 8 and the terminal 3 as before.

〔Effect of the invention〕

As explained above, according to the present invention, it is not necessary to prepare in advance information on all terminals connected to the host computer in order to put the terminal information in a broadcast frame and send it to the host computer. Because there is no need to prepare terminal information on the host computer in advance, you can add more terminals at any time. ■ When connected, the host computer sends data to all terminals and monitors their responses. Even if there is no broadcast frame, you can easily monitor the broadcast frames flowing on the line.
It is possible to connect a computer and a terminal. ■ Data is not sent from the host computer to an unconnected terminal, so there is no time-out error message while waiting for a response to send data to an unconnected terminal. ■ Between the host computer and the terminal During communication processing, there is no need to be aware of unconnected terminals, which has excellent effects such as reducing the load on the host computer.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a terminal control system according to an embodiment of the present invention. FIG. 2 is a diagram showing a communication frame format used in the terminal control method according to the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Broadcast frame transmitting means, 2... Communication processing means, 3... Terminal, 4... Broadcast frame receiving means, 5.
...Analysis means, 6. Creation means, 7. Communication activation means, 8. Host computer, 9. Line branching device, 21. Communication frame 1.22.. Partner station. Address field, 23... Own station address field, 24... Data field.

Claims (1)

[Claims] (1) A host computer (8) and one or more terminals (3) connected to this host computer via a line.
), the host computer is equipped with communication processing means (2) for data transmission, and the terminal control system is equipped with means for transmitting terminal information necessary for connection from the terminal to the host computer. In this case, the terminal is equipped with a broadcast frame transmitting means (1) for transmitting terminal information necessary for connection with the host computer using a broadcast frame, a broadcast frame receiving means (4) for receiving the received broadcast frame; an analysis means (5) for analyzing terminal information from the received broadcast frame; 1. A terminal control method comprising: a creation means (6) for creating communication information; and a communication activation means (7) for activating the communication processing means based on the communication information with the terminal.