JPH11312100A - Remote control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote control system for reducing transfer data on a communication line. SOLUTION: A terminal 1 to be managed transmits plotting instruction data 500 to be used in the image rendering of the display picture through a communication line 3 to a management terminal 2 so that an image based on the rendering instruction data 500 can be displayed on the display screen of the management terminal 2. The management terminal 2 transmits event data 700 related with the remote operation of the terminal 1 to be managed, based on the image displayed on the display screen through the communication line 3 to the terminal 1 to be managed so that the operation processing of the terminal 1 to be managed can be operated, based on the event data 700.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a network (L)
Managed terminal (for example, AN, WAN, etc.)
The present invention relates to a remote operation system for remotely operating a personal computer or the like from a management terminal (for example, a personal computer or a workstation).

[0002]

2. Description of the Related Art Conventionally, in a remote operation system for remotely operating a managed terminal connected to a network from a management terminal, screen display data is extracted at regular intervals from a screen display memory of the managed terminal. After transferring the extracted screen display data to the management terminal over the network, the management terminal stores the transferred screen display data in a screen display memory and displays it on the screen of the management terminal.

[0003]

However, in the conventional remote operation system, since the data size of the screen display data is large, the load on the network increases, which affects other terminals connected to the network. There was a problem. Even if the data size of the screen display data is compressed and transmitted, the compression / expansion method such as the run-length method or JPEG compresses the data after compression from about 1/5 to 1/50. / The processing time required for decompression is long, and the total load may be rather large due to the processing time.
Even if compression / expansion of screen display data is performed by a dedicated device such as a video signal encoding device / video signal decoding device, the processing time required for compression / decompression is reduced, but the size of the terminal and the manufacturing cost thereof are reduced. There was a problem in terms of.

[0004] Further, even if the interval for extracting the screen display data is lengthened to reduce the data to be sent to the network, the load on the network is reduced, but the change of the screen display data at the management terminal is slowed down and the managed terminal is not changed. There is a problem that a phenomenon different from the display state occurs, and the remote operation of the managed terminal cannot be accurately performed on the management terminal side.

[0005]

A remote operation system according to the present invention is a remote operation system for connecting a management terminal and a managed terminal via a communication line and remotely operating the managed terminal from the management terminal via the communication line. The managed terminal transmits drawing command data used for drawing an image on the display screen to the management terminal via a communication line, and displays an image based on the drawing command data on the display screen of the management terminal. Means for displaying, the management terminal transmits event data relating to remote operation of the managed terminal based on the image displayed on the display screen to the managed terminal via a communication line, and It has means for performing operation processing based on event data.

[0006]

FIG. 1 is a block diagram showing the configuration of a remote operation system according to the present invention. In the figure, 1
Is a managed terminal that is a terminal that is remotely operated, 2 is a management terminal that is a terminal that is remotely operated, and 3 is a communication line to which the managed terminal 1 and the management terminal 2 are connected. In the managed terminal 1, the operating system 4 is running, and the command processing unit 5, the mouse event processing unit 61, the keyboard event processing unit 62, and the event processing unit 5, which are composed of the command detection processing unit 51 and the command extraction processing unit 52, It includes an event processing unit 6 including a type determination processing unit 63, a data reception processing unit 71, a data transmission processing unit 72, and a communication processing unit 7 including a communication connection processing unit 73.

The management terminal 2 has an operating system 8 running thereon, and includes an instruction processing unit 9, an event detection processing unit 101, an event processing unit 10 comprising an event type determination processing unit 102, and a data reception processing unit. 1
11, data transmission processing unit 112 and communication connection processing unit 11
3 includes a communication processing unit 11.

Next, the operation of this embodiment will be described. 2 to 4 are flowcharts showing the operation of this embodiment. FIG. 2 shows the operation of the initialization process, FIG. 3 shows the operation of the instruction execution process, and FIG. 4 shows the operation of the event execution process. FIG.
FIGS. 5A and 5B are explanatory diagrams for explaining drawing command data and event data. FIG.
(B) shows event data.

Here, as the initialization processing, first, the management terminal 2 starts monitoring by the event detection processing unit 101 to detect an event (mouse / keyboard) generated in the operating system 8 (event monitoring processing). ) (S301). Then, when preparation for event monitoring is completed, a connection request is transmitted by the communication connection processing unit 113 to establish a communication path with the managed terminal 1 (communication connection processing) (S302). The connection request from the management terminal 2 is permitted by the connection processing unit 73 (communication path establishment processing) (S311).

After the communication path is established, the command detection processing unit 5 detects the drawing command data generated by the operating system 4 (data related to a group of functions related to drawing provided by the operating system).
1 starts monitoring (instruction monitoring processing) (S31)
2).

In the instruction execution process, first, the instruction detection processing unit 51 monitors the drawing instruction data called from the program to the operating system 4 in the managed terminal 1 and, when called, Detects the drawing command data 500 (for example, data as shown in FIG. 5A) (drawing command detection processing) (S401), and the command extraction processing unit 52 obtains the drawing command data in the drawing command detection processing of S401. The drawing command data 500 is transmitted to the data transmission processing unit 72.
(Data processing) (S402).

Then, the drawing command data 500 is transferred by the data transmission processing section 72 to the management terminal 2 at the connection destination (data transmission processing) (S 403). The drawing command data 500 is received and passed to the command execution processing unit 9 (data reception processing) (S411).
Then, a drawing command is executed for the operating system 8 in accordance with the contents of the passed drawing command data 500 (command execution processing) (S412).

In the event execution process, first,
The event detection processing unit 101 monitors an event generated by the administrator for the operating system 8 in the management terminal 2, and detects an event when an event occurs (event detection processing) (S601). The event extraction processing unit 102 processes the event obtained in the event detection processing of S601 into event data 700 as shown in FIG.
0 is passed to the data transmission processing unit 112 (data processing processing)
(S602).

Then, the event data 700 is transferred to the connection-target managed terminal 1 by the data transmission processing unit 112 (data transmission processing) (S603).
0 is received, and the event data 700 is passed to the event type determination processing unit 63 (data reception processing) (S611).

The event type determination processing unit 63 determines whether the passed event data 700 is a mouse event or a keyboard event. If the event data 700 is a mouse event, the event data 700 is passed to the mouse event processing unit 61. The event data 700 is passed to the keyboard event processing unit 62 (event type determination processing) (S612).

The mouse event processing section 61 and the keyboard event processing section 62 store event data 700
Each event is pseudo-generated for the operating system 4 in accordance with the content of the event (event pseudo-generation process) (S613).

By repeating the above processing, the management terminal 2 receives the drawing command data 500 and executes it so that the program running on the managed terminal 1 runs on its own machine. The managed terminal 1 operates as if it were operated on its own machine by receiving the event data 700 and executing it.

In this embodiment, drawing command data (data relating to a group of functions related to drawing provided by the operating system) generated in the operating system 4 of the managed terminal 1 is detected, and the detected drawing command data is managed. By transmitting the data to the terminal 2, when the managed terminal 1 is remotely operated from the management terminal 2, the data transferred on the network can be reduced, and the load on the network can be reduced.

For example, when a graphic having 100 dots vertically, 100 dots horizontally, and 256 colors is drawn on the managed terminal, the method of transmitting image display data is 10K bytes (uncompressed), 0 bytes. .2 Kbytes (at the time of compression) must be sent to the network. In this embodiment, the drawing command name (Rectangle (9 bytes)), the number of arguments to the drawing command (4 (1 byte)), A total of 18 pieces of argument data to the drawing command (X coordinate of upper left corner (2 bytes), y coordinate of upper left corner (2 bytes), X coordinate of lower right corner (2 bytes), y coordinate of lower right corner (2 bytes)) Only bytes are needed.

Although this embodiment has been described with reference to an example of a remote operation system using a management terminal and a managed terminal, the present invention may be applied to a system for remote management and operation. Further, the present invention can be applied to a system for sharing characters, graphics, and image data, for example, a system using a whiteboard application, a co-authoring system, and a system for sharing the same application among a plurality of terminal devices.

[0021]

As described above, according to the present invention, the managed terminal transmits drawing command data used for drawing an image on the display screen to the management terminal via a communication line.
An image based on the drawing command data is displayed on the display screen of the management terminal, and the management terminal receives event data relating to remote operation of the managed terminal based on the image displayed on the display screen via the communication line. Send to the management terminal,
Since the operation processing of the managed terminal is performed based on the event data, the transfer data on the communication line when the managed terminal is remotely operated from the management terminal can be reduced, and the load on the communication line can be reduced. It has the effect of.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a remote operation system according to the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is a flowchart showing the operation of the embodiment.

FIG. 4 is a flowchart showing the operation of the embodiment.

FIG. 5 is an explanatory diagram for describing drawing command data and event data.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 managed terminal 2 management terminal 3 communication line 4 operating system 5 instruction processing unit 6 event processing unit 7 communication processing unit 8 operating system 9 instruction execution processing unit 10 event processing unit 11 communication processing unit

Claims (2)

[Claims] 1. A remote operation system for connecting a management terminal and a managed terminal by a communication line and remotely operating the managed terminal from the management terminal via the communication line, wherein the managed terminal has a display screen Means for transmitting drawing command data used in drawing an image to the management terminal via the communication line to display an image based on the drawing command data on a display screen of the management terminal. The management terminal transmits event data relating to a remote operation of the managed terminal based on an image displayed on the display screen to the managed terminal via the communication line, and performs an operation process of the managed terminal. Remote control system based on the event data. 2. A remote operation system for connecting a management terminal and a managed terminal by a communication line and remotely operating the managed terminal from the management terminal via the communication line, wherein the managed terminal is a basic terminal. An operating system for performing processing, command processing means for detecting and extracting drawing command data used in drawing an image of the display screen of the managed terminal generated by the operating system, and detecting and extracting by the command processing means Communication processing means for transmitting the rendered drawing command data to the management terminal via the communication line, and receiving event data relating to a remote operation from the management terminal, based on the event data received by the communication processing means. An event that outputs terminal remote operation information to the operating system and performs operation processing An operating system that performs basic processing of the terminal; an event processing unit that detects and extracts event data relating to remote operation of the managed terminal generated by the operating system; A communication processing unit that transmits the event data detected and extracted by the processing unit to the managed terminal via the communication line, and receives drawing instruction data from the managed terminal; A remote operation system comprising: an event processing unit that outputs a drawing command for a display screen based on drawing command data to an operating system, and performs an image drawing process on the display screen.