JPH0314057A - Connection switching system between data processing program and terminal - Google Patents

Abstract

PURPOSE:To increase a connection switching processing speed at the time when an application program of the transfer request destination is managed by the same host system as the transfer request source by providing a transfer request destination judging part and a coupling relation switching part. CONSTITUTION:When a data processing part 10 informs a communication control part 12 to transfer the use right of a terminal 3, which the data processing part 10 uses at present, to a data processing part 11, a transfer request destination judging part 13 judges whether the data processing part 11 of the transfer request destination is under management of a first host system 1 or not. When it is under management of the first host system 1, a coupling relation switching part 14 settles internal coupling relations between the data processing part 11 and the terminal 3 and reports the request for switching to the data processing part 11 to a communication control part 20 of a second host system 2 through a communication line 4, and a communication disconnecting part 21 disconnects communication between the terminal 3 and the data processing part 10. Thus, one set of control data is only transmitted and received to realize the switching processing of connection to the terminal 3.

Description

[Detailed description of the invention] 〔overview〕.

Regarding the connection switching method between the data processing program and the terminals of other host systems, the purpose is to reduce the amount of communication between host systems required for switching processing. When a device is requested to be transferred to a program, there is a means for determining whether the program to be transferred is under one's control, and a means for determining whether the program to be transferred is under one's control, and a method for determining whether the program and the terminal are under one's control. and a means for switching the internal connection relationship between the transfer destination and the transfer destination program, and notifying the terminal side host of a connection switching request, and the terminal side host receiving the program switching request. Sometimes, there is a means to disconnect the communication between the transfer source program and the terminal, and when the disconnection process is completed, the internal connection relationship between the program and the terminal is switched from the transfer destination program to the transfer destination program side. and means for establishing communication between the transfer destination program and the terminal and notifying the data processing host when the switching process is completed.

[Industrial application field]

The present invention relates to a connection switching method between a data processing program under the management of a host system and a terminal provided in the host system that is connected to the host system via a communication line, and in particular, for connection switching processing. The present invention relates to a connection switching method between a data processing program and a terminal that can reduce the amount of communication required between host systems.

A data processing program under the control of a host system is connected to a terminal of another host system to execute data processing. In such a data processing system, the data processing program using the terminal transfers the right to use the terminal to other data processing programs.
In order to reduce the burden of communication lines between host systems, it is necessary to perform this terminal connection switching process with as little communication as possible.

[Prior Art] As shown in FIG. 4, an application program a under the control of a host system A transfers the right to use the terminal C of the host system C to the application program b of the host system B.
The prior art will be explained by taking as an example a case in which a computer is transferred to a computer.

In conventional MSNF communication, when performing connection switching processing for such terminals, as shown in Fig. 5,
As a first step, the application program a transmits a terminal transfer request to the communication management section (one of the functions included in the communication control program) of the host system C via the communication line.

Upon receiving the normal completion response to the transmission of this transfer request, application program a then performs the following steps as a second step:
A request to release communication with application program a is sent to terminal C. Upon receiving the normal completion response to this communication release request, application program a then, as a third step, sends a connection termination request to the communication management section of host system C to establish connection with terminal C. Notify that the connection has been disconnected and receive a successful completion response.

Next, as a fourth step, the communication management unit of the host system C transfers the application program b of the host system B to which the transfer is made.
Sends call connection instructions to.

Upon receiving the normal completion response to the transmission of the call connection instruction, the communication management section of the host system C subsequently
As a step, a communication protocol setting instruction is sent to application program b in order to set protocol rules,
A normal completion response for this is received. Finally, application program b executes terminal C as the sixth step.
By transmitting a communication establishment request to the terminal C and receiving a normal completion response thereto, the connection switching process with the terminal C is completed.

To be more precise, the processing of application program a described above is executed according to the communication control program of host system A, and the processing of application program b is executed according to the communication control program of host system B. Further, the numbers in "Ooo" in the figure represent step numbers.

In this way, application program a of host system A is
When passing the right to use terminal C of host system C in use to application program b of host system B, a total of 12 pieces of control data must be sent and received between host system A and host system B. It is.

[Problem to be solved by the invention]

Indeed, of the right to use the terminal! If the requesting application program a and the application program b to which the transfer request is made are under the control of different host systems, it is necessary to follow the conventional technology switching procedure; If program a and application program b to which the transfer is requested are under the control of the same host system, the managing host system can proceed with the switching process without having to communicate with host system C each time. It is possible to take

However, in the conventional technology, even if the application program a that makes the tlR request and the application program b that makes the transfer request are under the control of the same host system, they are the same regardless of whether they are under the control of different host systems. I was trying to execute the switching procedure. From now on, with conventional technology,
Switching the connection with terminal C from application program a to application program b may require wasted time.
There was a problem in that the efficiency of data processing was reduced. When host systems are connected via a packet switching network or the like, a large amount of control data needs to be sent and received, resulting in high communication costs.

The present invention has been made in view of the above circumstances, and it is possible to transfer the right to use a terminal when the optical data processing program is under the control of the same host system, or when it is under the control of a different host system. aims to promote a new connection switching method between a data processing program and a terminal that solves the problems of the prior art by adopting a different switching procedure. .

[Means to solve the problem]

FIG. 1 is a diagram showing the principle configuration of the present invention.

In the figure, l is the first host system, 2 is the second host system, 3 is the terminal provided in the second host system 2, and 4
1 is a communication line connecting the first host system 1 and the second host system 2, and 10 and 11 are data processing units that perform predetermined data processing under the control of the first host system l. 12 is a communication control unit provided in the first host system 1 and controls communication with the second host system 2; 13 is a surrender request destination determination unit, When a data processing unit in use requests transfer of the terminal 3 to another data processing unit, it is determined whether the other data processing unit is under the control of the first host system 1. Reference numeral 14 is a connection-related switching unit that switches the internal connection relationship between the data processing unit and the terminal 3 from the transfer requesting data processing unit to the transfer requesting data processing unit; 20 is a communication control unit provided in the second host system 2 and controls communication with the first host system 1. , 21 is a communication disconnection unit that disconnects communication between the transfer requesting data processing unit and the terminal 3;
23 is a connection-related switching unit that switches the internal connection between the data processing unit and the terminal 3 from the transfer request source data processing unit to the transfer request destination data processing unit; 23 is a communication establishment unit; Then, communication is established between the data processing unit to which the ``/X'' request is made and the terminal 3, and the first host system 1 is notified.

[Effect]

In the present invention, for example, the terminal 3 being used by the data processing unit 10
The communication control unit 1 transfers the right to use the data processing unit 11 to the data processing unit 11.
2, the transfer request destination determination unit 13 determines whether the transfer request destination data processing unit 11 is under the control of the first host system 1. Based on this determination, when determining that the data processing unit 11 to which the transfer request is made is in the administrative role of the first host system 1, the connection-related switching unit 14 is established between the data processing unit 10 and the terminal 3. The data processing unit 1
1 and the terminal 3, and also notifies the communication control unit 20 of the second host system 2 via the communication line 4 of a request to switch to the data processing unit 11.

Upon receiving the notification of this switching request, the communication disconnection unit 21
Communication between the terminal 3 and the data processing unit IO is disconnected. When this cutting process is completed, the connection related switching unit 22
releases the internal connection relationship established between the terminal 3 and the data processing unit IO, and connects the terminal 3 and the data processing unit 1
Establish an internal connection relationship with 1. When this switching process is completed, the communication establishment unit 23 establishes communication between the terminal 3 and the data processing unit II, and then communicates with the communication control unit 12 of the host system I via the communication line 4. It is notified that the switching to the data processing section 11 has been completed.

As described above, according to the present invention, when the data processing units that request transfer of the right to use a terminal and the data processing unit that requests the transfer are in the same host system, a request for switching the data processing unit is sent via the communication line 4. By simply transmitting and receiving one set of control data consisting of control data and control data in response to the control data, the connection switching process with the terminal 3 can be realized.

〔Example] Hereinafter, the present invention will be explained in detail according to examples.

FIG. 2 shows the system configuration of a data processing system to which the present invention is applied. In the figure, the same parts as those explained in FIG. 1 are indicated by the same symbols. la is a host system, 2a is a host system including a terminal 3, 5 is a communication control device included in the post system 1a, 6 is a communication control device included in the host system 2a, IOa and lla
is an application program managed by host system la, 12
a is a communication control program included in the host system la;
20a is a communication control program included in the host system 2a.

Next, the present invention will be explained in detail according to the embodiment shown in FIG.

For example, if application program loa is a parent task and application program lla is a child task, and it becomes necessary to transfer the right to use terminal 3 used by application program loa to application program lla, the application program 10a sends a transfer request for the terminal 3 to the communication control program 12a that implements the communication access method. Upon receiving this transfer request, the communication control program 12a:
First of all, the transferred light application program that was notified
It is determined whether or not a is an application program under the control of its own host system la.

Based on this determination, when it is determined that the application program lla is an application program under the control of another host system (not shown), the communication control program 12a grants the right to use the terminal 3 according to the conventional technique explained in FIG. Processing will be performed to transfer it to the application program lla.

On the other hand, when determining that the notified transferred light application program lIa is an application program under the control of its own host system la, the communication control program 12a
Next, releases the internal connection between the application program 10a, which is the transfer request source, and the terminal 3, and then establishes the internal connection between the application program lla, which is the transfer request destination, and the terminal 3. do. Then, the terminal 3 via the communication line 4
A communication control program 20 for a host system 2a comprising
A is requested to switch the connection with the terminal 3 from the application program 10a to the application program lla. The release processing related to the internal connection between the application program 10a and the terminal 3, which is executed by the communication control program 12a, corresponds to the processing of the first to third steps of the prior art described in FIG. , Also, the process of establishing an internal connection relationship between the application program 11a and the terminal 3 is performed as follows:
This corresponds to the processing of the fourth step to the sixth step.

In this way, when a request to switch the connection of the terminal 3 is received from the communication control program 12a of the host system la,
The communication control program 20a of the host system 2a first sends information to the terminal 3 and the application program 10.
sends a request to disconnect communication with a. This disconnection request process corresponds to the second step process of the prior art explained in FIG. Upon receiving this disconnection request, the terminal 3 disconnects the communication between the terminal 3 and the application program 10a, and
The termination of the disconnection process is notified by sending a normal completion response to the communication control program 20a.

The communication control program 20a then releases the internal connection between the terminal 3 and the application program lOa that is the source of the transfer request, and then releases the internal connection between the terminal 3 and the application program lla that is the transfer request destination. Establish a join relationship. This process of releasing the internal connection between the terminal 3 and the application program 10a corresponds to the first and third steps of the prior art explained in FIG. The process of establishing an internal connection with program lla corresponds to the fourth and fifth steps.

When the internal connection-related switching process is completed, the communication control program 20a sends a request to the terminal 3 to establish communication between the terminal 3 and the application program lla. This establishment request process corresponds to the sixth step process of the prior art explained in FIG. Upon receiving this establishment request,
The terminal 3 establishes communication between the terminal 3 and the application program lla and sends a normal completion response to the communication control program 20a. Then, by sending a normal completion response to the communication control program 12a of the host system la, it is sent that the processing for the switching request has been completed. Upon receiving this normal completion response, the communication control program 12a of the host system la sends a normal completion response to the application program 10a that is the destination of the transfer request, thereby processing the transfer request of the terminal 3. Notify that the has ended.

In this way, if the application program 11a to which the transfer request is made is under the control of the same host system 1a as the application program 10a which is the transfer request source, the transfer request can be made between the application program 11a and the terminal 3 by just sending and receiving one set of control data. connection switching processing can be realized.

[Effect of the Invention] As explained above, according to the present invention, the application program lla of the transfer request destination is transferred to the application program 10 of the quasi-transfer request source.
If it is under the control of the same host system la as terminal a, the number of control data to be sent and received will be reduced from 6 meters to one set, so the process of switching the connection between data processing programs such as application programs and terminal 3 will be necessary. This will allow you to run faster. Furthermore, since the ratio of communication lines between host systems can be reduced, communication costs can be greatly reduced when communication is performed using a packet switching network or the like.

Fig. 2 is a system configuration diagram of a data processing system to which the present invention is applied, Fig. 3 is an embodiment of the present invention, Fig. 4 is a system configuration diagram of a data processing system used to explain the prior art, and Fig. 5 is a system configuration diagram of a data processing system to which the present invention is applied. FIG. 2 is an explanatory diagram of a prior art.

In the figure, ■ is a first host system, 2 is a second host system, 3 is a terminal, 4 is a communication line, 5 and 6 are communication control devices, 10 and 11 are data processing units, and 12 is a communication control unit , 13 is a transfer request destination determination unit, 14 is a combination related switching unit,
2o is a communication control section, 21 is a communication disconnection section, 22 is a coupling-related switching section, and 23 is a communication establishment section.

Claims (1)

[Claims] Consists of a first host system and a second host system connected to the first host system via a communication line, and data processing under the control of the first host system. In a data processing system in which a data processing unit executes data processing by being connected to a terminal of the second host system, the first host system transmits information from a data processing unit that is using the terminal to another data processing unit. a transfer request destination determination unit (13) that determines whether or not the other data processing unit is under the control of the first host system when there is a transfer request for the terminal; When it is determined that the terminal is under the control of the first host system, the internal connection between the data processing unit and the terminal is switched from the transfer request source to the transfer request destination data processing unit, and
The second host system includes a connection-related switching unit (14) that notifies the second host system of a data processing unit switching request, and when the switching request is made, the second host system A communication disconnection unit (21) that disconnects communication between the data processing unit and the terminal, and when the disconnection process is completed, transfers the internal connection between the data processing unit and the terminal from the transfer request source. A connection-related switching unit (22) that switches to the data processing unit of the request destination, and when the switching process is completed, establishes communication between the data processing unit of the transfer request destination and the terminal, and A connection switching method between a data processing program and a terminal, comprising: a communication establishment unit (23) for notifying a host system.