JPH0237449A - Echo back control system for pre-communication processing device subsystem - Google Patents

Abstract

PURPOSE:To enable a terminal to communicate with an application program in a host computer system even during echo back switching by switching echo back of a text from the terminal without stopping a pre-communication processing device sub-system. CONSTITUTION:A request for logical coupling to a terminal 15 is issued from an application program 111 to a transmission means 122. The means 122 issues an echo back switching request (echo back start/stop) to an echo back switching means 123. The means 123 issues an echo back start/stop request to firmware 124. Consequently, a pre-communication processing device subsystem 12 is not stopped during the processing. Thus, a terminal 16 can communicate with an arbitrary application program in the host computer system through the pre- communication processing device subsystem 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a front-end communication processing device subsystem. Echo back control method for upstream messages from terminals [Prior technology] In the conventional echo back control method for upstream messages from terminals in the front-end communication processing subsystem.

When switching the echo back, it is necessary to initialize the front-end communication processing unit subsystem, so dynamically switching the echo back is not possible.

The front-end communications processor subsystem needed to be stopped.

[Problem to be solved by the invention]

In the conventional echo back control method of the front communication processor subsystem described above, when switching the echo back of the front communication processor subsystem.

It is necessary to stop the front-end communication processing unit subsystem.
There is a drawback that when switching the echo back of the front-end communication processor subsystem, the terminal communicating with the host computer system via the front-end communication processor subsystem becomes unusable.

[Means to solve the problem]

The echo back control method of the front-end communication processing device subsystem according to the present invention is a method for controlling the echo back of a front-end communication processing device subsystem in a communication system in which a business program in a host computer system performs data communication with an arbitrary terminal via the front-end communication processing device subsystem. The communication processing device subsystem includes a sending means for transmitting messages from a business program in the host computer system to an arbitrary terminal, a receiving means for receiving messages from an arbitrary terminal to the host computer system, and and echoback switching means for switching the echoback of uplink messages from the terminal in response to a logical connection request from the program to the terminal.

〔Example〕 Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1, there is shown a system to which an echo back control method according to an embodiment of the present invention is applied.

The host computer system 11, the front-end communication processing unit subsystem 12, and the path-like or loop-like communication paths 13 and 7
It consists of a communication channel 14 and terminals 15 and 16. The host computer system 11 includes a business program 111 and a business program 112. Front-end communication processor subsystem 12
includes a receiving means 121, a transmitting means 122, etc., an echo back switching means 123, and firmware 124, 125. FIG. 2 is a processing diagram of the transmitting means 122. Transmission means 1
22 is a logical combination request reception process 21;

Echo back switching notification processing 22 and lower stain message reception processing 2
3 and a bottom stain text transmission process 24.

In this embodiment, it is assumed that the business program 111 does not perform echo back processing to the terminal.

It is also assumed that the business program 112 performs echo back processing for the terminal.

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

The front end communication processor subsystem 12 connects the host computer system I via a path or loop communication path 13.
front-end communication processor subsystem 1 coupled to f;
Terminals 15 and 16 are connected to 2 through various communication paths 14. Similarly, it is assumed that the terminal 15 does not have a local eco-parameter function.

First, the business program 111 issues a logical connection request with the terminal 15 to the sending means 122.

The transmitting means 122 issues an echo back switching request (echo back start) to the echo back switching means 123. The echo back switching means 123 issues an echo back start request to the firmware 124.

Next, it is assumed that an upstream message is generated from the terminal 15 to the business program 111.

The upstream message from the terminal 5 is notified to the firmware 124 in the front-end communication processing device subsystem 12. In the firmware 124, the uplink message is received by the receiving means 121.
At the same time, an echo back is sent to the terminal 15. The uplink message is notified to the business program 111 by the receiving means 121.

It is assumed that after the above processing, the logical connection between the business program 111 and the terminal 15 is released.

Next, the business program 112 issues a logical connection request with the terminal 15 to the transmitting means 122.

The transmitting means 122 issues an echo back switching request (echo back stop) to the echo back switching means 123. The echoback switching means 123 issues an echoback stop request to the firmware 124.

Next, it is assumed that an upstream message is generated from the terminal 15 to the business program 112.

The armware 124 receives the upstream message from the receiving means 12.
1 and does not echo back to the terminal 15. The upstream message is notified to the business program 112 by the receiving means 121.

The business program 112 notifies the transmitting means 122 of the echo back to the terminal as a downstream message. The transmitting means 122 transmits the downlink message to the terminal 15.

While the above processing is being performed, the front-end communication processing unit subsystem 12 does not stop, so the terminal 16.

Via the front-end communication processing device subsystem 12, communication can be performed with any business program within the host computer system.

〔Effect of the invention〕

As explained above, the present invention enables echo-back of uplink messages in the front-end communication processor subsystem connected to the host computer system by a bus-like or loop-like communication path. Since switching can be performed without stopping the front-end communications processor subsystem, any terminal can perform business operations within the host computer system via the front-end communications processor subsystem even during echoback switching. This has the effect of being able to communicate with programs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a system to which an echo back control method according to an embodiment of the present invention is applied, and FIG. 2 is a flowchart of processing of the transmitting means of FIG. 1. DESCRIPTION OF SYMBOLS 11... Host computer system, 111... Business program, 112... Business program, 12... Front-end communication processing device subsystem, 121... Receiving means. 122... Transmission means, 123... Echo back switching means, 124... Firmware, 125... Firmware, 13... Bus-like or loop-like communication path. 14... Communication path, 15... Terminal, 16... Terminal,
21...Logical combination request reception process, 22...Echo bar switching notification process, 23...Bottom stain sentence reception process, 24
...Transmission processing with large stains on the bottom. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. In a communication system in which a business program in a host computer system performs data communication with an arbitrary terminal via a front-end communication processing device subsystem, the front-end communication processing device subsystem: sending means for transmitting a message from the business program to an arbitrary terminal; receiving means for receiving a message from the arbitrary terminal for the host computer system; and an echo back switching means for switching the echo back of a message, and is capable of switching the echo back of a message from a terminal without stopping the front communication processing device subsystem. Device subsystem echoback control method.