JPH09259083A - Virtual terminal control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make client terminals possible to share a screen, to reflect operations/commands in the shared screen, and to inform a computer system of it by providing a frame server, reflecting the operations or the like from the client terminals in a virtual screen, reflecting a response from a host computer system in the virtual screen and informing all the subordinate client terminals. SOLUTION: The frame server 2 reflects information informed from the subordinate client terminals 3 in the virtual screen, informs the host computer system 1 and informs all the subordinate client terminals 3 of shared virtual screen date. The client terminals 3 display the screen based on the virtual screen data informed from the frame serve 2 and informs the frame serve 2 of operation input. The host computer system 1 performs a processing based on the information from the frame serve 2 and informs the frame server 2 of the result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a virtual terminal control system for sharing a screen between client terminals connected to a computer system.

[0002]

2. Description of the Related Art Conventionally, there are the following formats for connecting a terminal for inputting and outputting to a computer system.

(1) As shown in FIG. 8A, a terminal is directly connected to a computer system by a cable. (2) As shown in FIG. 8B, a LAN connection device is connected to the computer system, and a terminal such as a personal computer is connected via the LAN.

When the terminal is directly connected to the computer system of the above (1) with a cable, the installation place to be connected is limited, and it is difficult to use it except for business where importance is attached to security protection.

When a terminal is connected to the computer system of the above (2) via a LAN, the place of installation is not limited and it is generally used.

[0006]

[Problems to be Solved by the Invention]
In both cases (2), there is a problem that a terminal capable of operating keys by displaying the same contents on the screen at the same time by connecting to the computer system must be one terminal.

Further, there has been a problem that the key operation from the terminal needs to be a manual operation by the operator and the key operation cannot be automatically performed. Therefore, when operating a certain terminal to notify the computer system and displaying the result on the screen for business processing, the same screen is displayed and shared at another distant place and the progress of the business processing is advanced. There is a demand for a system that refers to, or if necessary, operates a key on the terminal itself to notify and reflect it in a computer system.

[0008] The present invention solves these problems,
A frame server is installed between the client terminal and the computer system to reflect the operations and commands from the client terminal on the virtual screen and notify the computer system to reflect the response on the virtual screen and notify all the client terminals under it. To realize a system in which screens are shared, all client terminals share the screens as they are in a conventional computer system, and operations / commands from any one of the client terminals are reflected on the shared screen and can be notified to the computer system. It is an object.

[0009]

Means for solving the problem will be described with reference to FIG. In FIG. 1, the computer system 1 performs processing in response to the notification from the frame server 2 and returns the processing result.

The frame server 2 is provided between the computer system 1 and one or a plurality of client terminals 3, and manages a virtual screen 29 shared by the client terminals 3.

The virtual terminal control table 28 sets the presence or absence of the operation right in association with the client terminal. The virtual screen 29 is a virtual screen provided on the frame server 2 and shared by all client terminals 3.

The client terminal 3 is the frame server 2
Virtual screen 2 to connect to and notify various operation instructions to share
Various business processes are performed by reflecting the information in 9 and notifying the computer system.

Next, the operation will be described. The client terminal 3 displays a shared screen based on the virtual screen data notified from the frame server 2 or notifies the frame server 2 of the data input by operation on the screen, and the frame server 2 receives from the client terminal 3 Information on virtual screen 2
9 and the computer system 1 is notified, and the virtual screen data to be shared is notified to all the client terminals 3 under it and displayed on the screen.

At this time, the application of the client terminal 3 notifies the frame server 2 of an input operation instruction by a command instead of the key operation. Further, only the client terminal 3 to which the frame server 2 is first connected or the predetermined client terminal 3
Is set to the virtual terminal control table 28 with the operation right, the other terminals are set to the virtual terminal table 28 without the operation right, and when the client terminal 3 is notified of the information, the operation right is set. Only the information of the client terminal 3 with the presence is reflected on the virtual screen 29 and notified to the computer system 1, while the information of the client terminal 3 without the operation right is reflected on the virtual screen 29 and not notified to the computer system 1. .

Further, when the frame server 2 receives the notification of the acquisition request of the operation right from the client terminal 3, the operation right of the client terminal 3 in the virtual terminal control table 28 is set to be updated and the operation right is set. The operation right of the client terminal 3 is updated without any permission.

Therefore, the frame server 2 is provided between the client terminal 3 and the computer system 1, the operation and command from the client terminal 3 are reflected on the virtual screen 29, and the host computer system 1 is notified and the response is sent to the virtual screen. By reflecting in 29 and notifying all the client terminals 3 under it to share the screen, all the client terminals share the screen and operate / command from any one of the client terminals in the conventional computer system. It is possible to realize a system that can reflect on the shared screen and notify the computer system 1.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment and operation of the present invention will be described in detail sequentially with reference to FIGS.

FIG. 1 shows a system configuration diagram of the present invention.
In FIG. 1, a computer system 1 is connected to a frame server 2 via a LAN or the like and performs various processes. When a notification is received from the frame server 2 by a message, the computer system 1 executes the process requested by the message. The processing is performed and the processing result is returned to the frame server 2.

The frame server 2 is provided between the computer system 1 and one or a plurality of client terminals 3 and manages a virtual screen shared by the client terminals 3, and the like. Unit 22, screen creation unit 23, screen transmission unit 24, operation right control unit 25, command control unit 26, virtual terminal connection control unit 27,
The virtual terminal control table 28 and the virtual screen 29 are included.

The host connection control section 21 exchanges electronic messages with the computer system 1 via a LAN. . The electronic message analysis unit 22 analyzes the received electronic message.

The screen creating section 23 reflects the result analyzed by the electronic statement analyzing section 22 on the virtual screen. For example, the whole or part of the virtual screen is created / updated, or the character string on the virtual screen is scrolled by one line.

The screen transmission unit 24 uses the shared virtual screen 29.
Is transmitted to the client terminal 3. The operation right control unit 25 gives the operation right only to the client terminal 3 which is set to have the operation right in the virtual terminal control table 28 among the plurality of subordinate client terminals 3 and gives an operation instruction by a telegram of the client terminal 3. Is notified to the computer system 1 or reflected on the virtual screen 29.

The command control unit 26 is for analyzing various commands using the commands (telegrams in which the commands are set) with the client terminal 3 and performing the corresponding processing.

The virtual terminal connection control unit 27 exchanges commands and electronic messages with the client terminal 3 via the LAN. The virtual terminal control table 28 is for setting the presence / absence of the operation right in association with the subordinate client terminal 3, and normally sets the operation right for the client terminal 3 first connected to the frame server 2. is there. The client terminal 3 sends an operation right request command to the frame server 2 to set the operation right of the own client terminal 3 in the virtual terminal control table 28, and then the client terminal 3 reflects the operation instruction on the virtual screen. Or to notify the computer system 1.

The virtual screen 29 is a screen shared by all client terminals 3 subordinate to the frame server 2. The client terminal 3 is connected to the frame server 2 and displays the same screen as the virtual screen 29. Any client terminal 3 under the frame server 2 gives an operation instruction and reflects it on the virtual screen 29 and the computer system 1
When the virtual screen 29 is transmitted to the client and is reflected on the virtual screen 29, the virtual screen 29 after the reflection is transmitted to all the client terminals 3.
It becomes possible to send it to and share it.

Next, the operation of the configuration of FIG. 1 will be sequentially described in detail with reference to FIGS. FIG. 2 shows an operation explanatory diagram of the present invention. Here, the client terminal (# 1), the client terminal (# 2), the frame server 2, and the computer system 1 correspond to each of FIG.

In FIG. 2, the client terminal (# 1) starts connecting to the frame server 2 in S1. S2 is
The frame searcher 2 having received the connection request notification from the client terminal (# 1) notifies the computer system 2 of the connection request.

In step S3, the computer system 2 that has received the notification of the connection request in step S2 performs processing for handling the connection request. In S4, the response resulting from the processing in S3 is returned to the frame server 2.

In S5, the frame server 2 that receives the response in S4 reflects the response on the virtual screen (for example, displays the initial screen). In S6, the frame server 2 that receives the response in S4 performs data communication of the initial screen with the client terminal (# 1).

In step S7, the initial screen received in step S6 is displayed as the screen of the client terminal (# 1). When the client terminal (# 1) makes a connection request to the frame server 2 through S1 to S7 described above, the frame server 2 sends a connection request to the computer system 1, and the frame server 2 receiving the processed response displays the initial screen. While displaying on the virtual screen, it transmits to the client terminal (# 1) and displays the initial screen on the screen. As a result, the virtual screen shared by the frame server 2 and the screen of the client terminal (# 1) are displayed as the same initial screen, and the preparation for the operation instruction from the client terminal (# 1) is completed.

Subsequently, the client terminal (# 2) is set to S1.
From 1 to S17, S of the client terminal (# 1)
Similar to 1 to S7, the initial screen is displayed on the screen of the client terminal (# 2), and the client terminal (#
The preparation for the operation instruction from 2) (or the preparation for displaying on the screen the same contents as the virtual screen 29 reflected when the client terminal (# 1) gives the operation instruction) is completed.

In S21, the computer system 1 sends the screen update to the frame server 2. S22 is S21
The frame server 2 updates the virtual screen 29 with respect to the screen update received in 1. and notifies all the client terminals (# 1) and client terminals (# 2) under the contents of the updated virtual screen 29.

In S23, the client terminal (# 1) notified in S22 updates the screen. S24 is S22
The client terminal (# 2) that received the notification in step updates the screen.

As described above, when the computer system 1 notifies the frame server 2 of the screen update, the frame server 2 updates the virtual screen 29 and all client terminals (# 1) under the virtual screen 29 have the same contents. ,
Notify (# 2) and update each screen. As a result, when the computer system 1 updates the virtual screen 29, the same contents as the contents of the virtual screen 29 shared by the screens of all the client terminals under it are displayed, and the screens can be shared.

In S31, the operator of the client terminal (# 1) operates the keyboard. In S32, since the frame server 2 which received the electronic message (command) about the keyboard operation in S31 refers to the virtual terminal control table 28 and the client terminal (# 1) is set to have the operation right, the keyboard operation is performed. Computer system 1
Resubmit to.

In step S33, a process corresponding to the keyboard operation received by the computer system 1 which receives the retransmission in step S32 is performed. Similarly, when the client terminal (# 2) operates the keyboard, the computer system 1 performs a process corresponding to the keyboard operation in S42 and S43. At this time, the client terminal (# 2) notifies the frame server 2 of the operation right request command of FIG.
It is necessary to set own operation right of No. 8 to Yes.

FIG. 3 shows an example of a message according to the present invention. FIG. 3A shows an example of a message (screen data). This is because the screen data is sent to the frame server 2 in S6 of FIG.
Is a message used when is transmitted to the client terminal 3. This message sets the following items shown in the figure.

Header command data flag Write screen data attribute Device Control Terminal state Modify Read Update screen read data Transfer Terminal screen transfer For example, the command “Write” is a command (telegram) for the computer system 1 to write screen data to the virtual screen 29.
It is.

FIG. 3B shows an example of a message (key operation). This is for setting a key operation in the electronic message (key operation) and transmitting the message at S31 and S41 in FIG. 2 described above. This message sets the following items shown in the figure.

Header AID Cursor Position Screen Data Flag Interrupt Code Attribute when Interrupt Occurs Enter Cursor Positions PF1 to 24 Clear FIG. 4 shows an operation explanatory diagram (acquisition of update screen) of the present invention.

In FIG. 4, in S51, the operator of the client terminal (# 1) operates a key. S52 is S
The frame server 2 which has received the notification of the key operation 51 sends the key operation to the computer system 1.

In S53, the computer system 1 that has received the key operation transmitted in S52 receives the AID and the cursor position (see the electronic message in FIG. 3B). S54
Performs processing based on the cursor position and the like received in S53.

In S55, the frame server 2 which receives the key operation notification in S51 fetches the key contents. S56 is
The frame server 2 that fetches the key contents in S55 reflects (updates) it on the virtual screen 29.

In S57, the computer system 1 executes S5.
In the process of 4, the frame server 2 is notified by informing the frame server 2 of a message in which the command Modify Read is set. S58 is
In response to the inquiry in S57, the frame server 2 refers to the virtual screen 29 that has already been updated with the key contents, and then the command Modify Read and the parameter (entire screen or updated)
About the update screen data specified by
The computer system 1 receives the transmission.

In S59, the processing is continued based on the update screen data received in S58. As described above, when the operator of the client terminal (# 1) operates a key, the key operation is notified to the computer system 1 via the frame server 2, and the processing corresponding to the key and the cursor position at the time of this key operation is performed. Since the virtual screen 29 of the frame server 2 has been updated based on the key contents, the computer system 1 can make an inquiry to obtain the updated screen data of the virtual screen 29 and continue the processing.

FIG. 5 is a diagram for explaining the operation of the present invention (propagation of key operation). In FIG. 5, in S61, the operator of the client terminal (# 1) operates a key.

In S62, a command is issued for the key operation of S61. In S63, the frame server 2 that has received the command issuance notification in S62 reflects (updates) the content of the key operation on the virtual screen 29.

Further, in S64 and S65, the application operating in the client terminal (# 1) causes the command put
24, 2, "Reset Clear" may be issued and reflected in the virtual screen 29 in the same manner in S63 (described later with reference to FIG. 6). As a result, the application can automatically notify the key operation of the operator and reflect it on the virtual screen 29.

In step S66, the changed screen data is transmitted to the client terminal (# 1) in response to the update of the virtual screen 29 shared by all the client terminals under its control in step S63. Then, in S67, the client terminal (# 1)
Displayed on the screen of.

Similarly, in S68, the changed screen data is transmitted to the client terminal (# 2) in response to the virtual screen 29 shared by all the client terminals under the control being updated in S63. Then, in S69, it is displayed on the screen of the client terminal (# 2).

The above S61 to S63 and S66 to S6
9, when the operator performs a key operation on a certain client terminal, the content of the key operation is reflected (updated) on the virtual screen 29 of the frame server 2 and also reflected (updated) on the screens of all the client terminals 3 under it. The same content is displayed, and key operations are performed on all client terminals 3.
Will be propagated to the screen.

Similarly, S64, S65, S63, S66
From S69 to S69, when an application in a client terminal issues a command corresponding to a key operation, the content of the command corresponding to the key operation is reflected (updated) on the virtual screen 29 of the frame server 2, and
It is reflected (updated) on the screens of all the client terminals 3 under its control, the same contents are displayed, and the key operation is propagated to the screens of all the client terminals 3, so that all the key operations are automatically performed by the application. It is possible to automatically propagate to the screen of the client terminal.

FIG. 6 shows a virtual screen (display of key operation) of the present invention. FIG. 6A shows an example of a virtual screen. This is because the Kleinato terminal (# 1) transmits the command put 24,2, "Reset Clear" in S65 of FIG. 5 described above to the frame server 2 as a message, and the frame server 2 analyzes and displays the virtual screen 2
9 is displayed above. Where put is a command and puts the contents indicated by the parameter on the screen (display)
It means to do. 24,2, "Reset Clear" is a parameter, and the character string "Reset Clear" is in the second digit of the 24th line.
r "is placed (displayed). As a result, 24" on the virtual screen 29 of FIG.
The character string "Reset Clear" is displayed from the second digit of the line as illustrated. In addition, the character string “Re” is displayed from the second digit of the 24th line displayed on the virtual screen 29.
“Set Clear” is transmitted to all the client terminals under its control, and the same items are displayed on the screens thereof (see S67 and S69 in FIG. 5).

FIG. 6B shows a format example of the key operation command. This key operation command sets the following items shown in the figure. Command parameter put Y-coordinate, X-coordinate transmission character string FIG. 7 shows an operation explanatory diagram (change of operation right) of the present invention.

FIG. 7A shows an operation explanatory diagram. Figure 7
In (a) of step S71, the client terminal (#
1) notifies the frame server 2 of the connection request.

In step S72, the frame server 2 which receives the connection request in step S71 sets the operation right "present" in association with the client terminal (# 1) having the first connection in the virtual terminal control table 28.

In S73, the client terminal (# 2) notifies the frame server 2 of the connection request. S74 is S7
The frame server 2 which has received the connection request of No. 3 of the client terminal (#
The operation right "none" is set in association with 2). this is,
Since the client terminal (# 1) that first made the connection request is already set in the virtual terminal control table 28 and the operation right is set to "Yes", the second and subsequent client terminals (# 1) are set.
Regarding 2), the operation right "none" is set, and the priority right of the operation right is given to the client terminal (# 1) which first requests the connection.

In S75, the client terminal (# 2) requests an operation right (issues a level 1 command). S76
Since the operation right request was made in S75, the frame server 2 sends the operation right request to the client terminal (# 2).
The operation right of the client terminal (# 1), which was the operation right, is changed to "absent". After that, only the client terminal (# 2) has the operation right and notifies the frame server 2 of the key operation, or the frame server 2 notifies the computer system 1 only when the application issues a key operation command. The contents of the key operation are reflected on the virtual screen 29. Even if another client terminal notifies the frame server 2 of a key operation or a key operation command, it does not have the operation right and is ignored or a message without the operation right is returned.

FIG. 7B shows an example of the command. Here, the following items shown in the figure are set.

[0060]

As described above, according to the present invention,
The frame server 2 is provided between the client terminal 3 and the computer system 1, the operation and command from the client terminal 3 are reflected on the virtual screen 29, the host computer system 1 is notified, and the response is sent to the virtual screen 29.
Since the screen is shared by notifying all the client terminals 3 under the control and sharing the screen by sharing the screen, all the client terminals 3 share the screen while maintaining the conventional computer system. The operation / command from can be reflected on the shared screen and notified to the computer system 1.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of the present invention.

FIG. 2 is a diagram illustrating the operation of the present invention.

FIG. 3 is an example of a telegram of the present invention.

FIG. 4 is an operation explanatory diagram (acquisition of an update screen) of the present invention.

FIG. 5 is an operation explanatory diagram (propagation of key operation) of the present invention.

FIG. 6 is a virtual screen (display of key operation) of the present invention.

FIG. 7 is an operation explanatory diagram (change of operation right) of the present invention.

FIG. 8 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 1: Computer system 2: Frame server 22: Message analysis unit 23: Screen creation unit 24: Screen transmission unit 25: Operation right control unit 26: Command control unit 28: Virtual terminal control table 29: Virtual screen 3: Client terminal

Claims (4)

[Claims] 1. A virtual terminal control system in which a screen is shared between client terminals connected to a computer system, information reflected from one or a plurality of client terminals under the virtual terminal control is reflected on the virtual screen and the computer system is notified, And a frame server for notifying shared virtual screen data to all the client terminals under it, and a screen for displaying the screen based on the virtual screen data notified by the frame server, and notifying the frame server of an operation input Alternatively, a virtual terminal control system comprising a plurality of client terminals and a computer system that performs processing based on the information notified from the frame server and notifies the result to the frame server. 2. The virtual terminal control system according to claim 1, wherein an application in the client terminal notifies the frame server of an input operation instruction. 3. A virtual terminal control table for setting an operation right in association with the client terminal is provided in the frame server, and the virtual terminal control is performed only for a client terminal to which the frame server is first connected or a predetermined client terminal. With the operation right set in the table, for the other client terminals, set the operation right not in the virtual terminal table, and when the client terminal is notified of the information, refer to the virtual terminal control table and operate. 3. The virtual screen is reflected and the computer system is notified only when the client terminal has the right, and the client terminal without the operation right is ignored or an error is notified. Virtual terminal control system. 4. The frame server is set to update the operation right of the client terminal in the virtual terminal control table to "Yes" and set the operation right to "Yes" in response to the notification of the operation right acquisition request from the client terminal. 4. The virtual terminal control system according to claim 3, wherein the operation right of the client terminal is updated without any permission.