JP4717289B2 - Computer remote operation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a computer remote operation system for remotely operating a computer connected via a communication line such as a LAN (local area network) or a telephone line from another computer.
[0002]
[Prior art]
  Conventionally, as a computer remote operation system, there is one that operates a computer connected to a communication line such as a LAN or a telephone line from another computer. This computer remote operation system is intended to be used mainly for maintenance, failure recovery, or presentation of the computer to be operated (hereinafter referred to as the remote terminal), and has the same contents as the screen of the remote terminal. Is displayed on the operating computer (hereinafter referred to as a local terminal) for remote operation.
[0003]
  On the other hand, in recent years, with advances in security such as broadband networks and VPN (Virtual Private Network), an environment where computers in remote locations can be operated safely and comfortably is being prepared. The computer can be used for purposes other than the above-mentioned maintenance and fault recovery, such as remotely accessing the computer from home or at home, or checking the mail of your own mail machine from another location in the office. Opportunities to perform remote operation of are increasing. Here, a function that provides such a usage method is referred to as a “remote desktop function”. There is also software that realizes such a remote desktop function, but these are also in the style of displaying and using the screen image of the remote terminal side as it is on the local terminal side.
[0004]
  In addition, some software that implements these remote desktop functions has a function to lock keyboard and mouse input on the remote terminal during remote operation. There are also things that take into account that input does not compete with the other side.
[0005]
[Problems to be solved by the invention]
  By the way, when using the remote desktop function in the above computer remote operation system, you can use it freely from another computer (local terminal) at a remote location until now. However, since the contents of the operation are still displayed on the screen of the remote terminal at that time, for example, the contents of reading and writing mail and the contents of reading and writing documents can be seen. There is a problem of end.
[0006]
  Also, in a situation where you operate a remote terminal that is your computer from a local terminal, the screen of the remote terminal is basically information that nobody needs to see because you are not near the remote terminal. However, since it operates while being operated, it is also a problem from the viewpoint of power saving. The same can be said for the sound function in the case where sound is generated from a remote terminal in addition to the display. Furthermore, considering the situation where a sound is sounding in spite of the absence of a person in front of a remotely operated remote terminal, there is a problem in terms of noise in addition to power saving.
[0007]
  In addition, in a computer remote operation system with a remote desktop function that can lock the input of the remote terminal during remote operation, the keyboard and mouse are locked even if you forget to disconnect the remote operation session and accidentally return to your remote terminal. Therefore, there is a problem that nothing can be operated. In that case, I had to go back to the local terminal and cut the session. This is a problem that can be fatal as the distance between the remote terminal and the local terminal increases.
[0008]
  SUMMARY OF THE INVENTION An object of the present invention is to provide a computer remote operation system that can release the lock state of the input of the remote terminal on the remote terminal side.
[0009]
[0010]
[Means for Solving the Problems]
  In order to achieve the above object, a computer remote operation system according to the present invention provides:
  In a computer remote operation system that remotely operates a remote terminal from a local terminal via a communication line,
  The remote terminal
  Session establishment means for establishing a remote operation session for the local terminal;
  An input device for operating the remote terminal;
  Input processing means for processing input data input by the input device;
  By the session establishment meansRemote operation session with the above local terminalIs established, the processing of the input data by the input processing means is not performed except for the processing of the input data representing the password information input by the input device.Input locking means for locking the function of the input device;
  When input data representing the password information is input to the input device,Locking state of the input device by the input lock meansSolveInput lock release means
It is characterized by having.
  According to the computer remote operation system configured as described above, even if the user forgets to disconnect the remote operation session and inadvertently returns to his / her remote terminal, the input lock release means of the remote terminal can lock the input state of the remote terminal. By releasing with the personal identification information, the lock state of the input of the remote terminal can be released on the remote terminal side, and there is no need to return to the local terminal side.
  Moreover, the computer remote operation system of one embodiment is
  The remote terminal includes session release means for releasing a remote operation session between the remote terminal and the local terminal when the lock state of the input device is released by the input lock release means. .
  According to the computer remote operation system of the above embodiment, when the input lock state is released by the input lock release unit, a session for remote operation between the remote terminal and the local terminal is performed by the session release unit of the remote terminal. Even if you forget to disconnect the remote operation session and inadvertently return to your remote terminal, you can automatically disconnect the remote operation session by unlocking the input using the input lock release means. Since it can be operated immediately, operability is improved.
  Moreover, the computer remote operation system of one embodiment is
  The remote terminal
  A VRAM in which display data is written;
  A display device for displaying the display data written in the VRAM;
  By the session establishment meansRemote operation session with the above local terminalIs establishedAnd a display control means for displaying a screen content different from the screen of the local terminal on the screen of the display device without updating the VRAM.
It is characterized by having.
[0011]
  According to the computer remote operation system of the above embodiment, during the session in which the remote terminal is remotely operated from the local terminal via the communication line, the display of the remote terminal differs from the screen of the local terminal on the screen of the remote terminal. Since the screen content is displayed, confidential information such as privacy can be protected on the remote terminal side.
[0012]
  Moreover, the computer remote operation system of one embodiment is
  The display control means includes
  Holds display information indicating whether the display mode is a display mode for displaying the display data on the screen of the display device or a display mode for displaying a screen saver having a screen content different from the screen of the local terminal on the screen of the display device. Display mode holding means for
  Based on the display information representing the display mode held in the display mode holding means,Above display dataDisplay mode for displayingOrthe aboveScreen saverDisplay mode for displayingDisplay mode determination means for determining which one ofWhenHave
  By the session establishment meansRemote operation session with the above local terminalIs establishedIn the display mode determining means,Based on the display information held in the display mode holding meansOf the above display deviceOn the screenAbove screen saverDisplay mode for displayingWhen it is determined that the screen is saved, a screen saver that protects the screen of the display device of the remote terminal is executed.
[0013]
  According to the computer remote operation system of the above embodiment, the secret information can be easily protected while protecting the screen on the remote terminal side by the screen saver executed by the display control means.
[0014]
  Moreover, the computer remote operation system of one embodiment is
  The display control means includes
  Display mode holding means for holding display information indicating whether it is a mode for displaying the display data on the screen of the display device or a power saving mode for turning off the screen of the display device;
  Display mode determination means for determining whether the display data is in a mode for displaying the display data or the power saving mode based on the display information held in the display mode holding means;
  By the session establishment meansRemote operation session with the above local terminalIs establishedInWhen the display mode determination means determines that the power saving mode is selected,The screen of the display device of the remote terminalEraseIt is characterized by having a power saving mode means.
[0015]
  According to the computer remote operation system of the above embodiment, the remote terminal is set to the power saving mode by the power saving mode means during the session for remotely operating the remote terminal from the local terminal via the communication line. It is possible to protect confidential information such as privacy on the side, and to reduce power consumption by reducing the display power on the remote terminal side.
[0016]
  Moreover, the computer remote operation system of one embodiment is
  The remote terminal
  A sound device for outputting sound;
  Sound mode holding means for holding sound information indicating whether the sound mode is a normal mode in which the sound output of the sound device is a normal output or a suppression mode for suppressing the sound output of the sound device;
  Based on the sound information held in the table sound mode holding means, a normal mode in which the sound output of the sound device is a normal output, or a suppression mode in which the sound output of the sound device is suppressed. Sound mode determination means for determining whether there is,
  By the session establishment meansRemote operation session with the above local terminalIs establishedInWhen determining that the sound mode determination means is a suppression mode for suppressing the output of sound of the sound device,Sound suppression means for suppressing the sound output of the sound device;
It is characterized by having.
[0017]
  According to the computer remote operation system of the above embodiment, the sound suppression means of the remote terminal suppresses the generation of sound on the remote terminal side during the remote operation session, thereby saving power and preventing noise on the remote terminal side. Can be achieved.
[0018]
[0019]
[0020]
[0021]
[0022]
[0023]
[0024]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, a computer remote operation system of the present invention will be described in detail with reference to embodiments shown in the drawings.
[0025]
  1 and 2 are block diagrams of a computer remote operation system according to an embodiment of the present invention. In FIG. 1, 1 is a computer to be operated (hereinafter referred to as a remote terminal), and in FIG. 2, 2 is a computer to be operated (hereinafter referred to as a local terminal). The remote terminal 1 and the local terminal 2 are connected via a communication line 3 (LAN, dial-up connection, etc.).
[0026]
  As shown in FIG. 1, the remote terminal 1 includes an operating system 1-5, an input device 1-6 such as a keyboard and a mouse used when the remote terminal 1 is used alone, and the input device 1-6. An input processing unit 1-3 that processes input remote terminal input data 1-7 and outputs an input command 1-4 to the operating system 1-5, and a display command 1-10 from the operating system 1-5 In response, the display processing unit 1-11 as display control means for outputting display data, the display device 1-13 for performing display based on the display data from the display processing unit 1-11, and the operating system 1 Sound processing unit 1-15 that outputs sound data in response to sound command 1-14 from -5, and a sound output device 1-16 that outputs sound based on the sound data from the sound processing unit 1-15 And above Local terminal input data 1-2 of the keyboard and mouse from the local terminal 2 (shown in FIG. 2) is sent to the input processing unit 1-3, and display data 1-12 and sound data 1-17 of the remote terminal 1 are sent locally. The communication processing unit 1-1 as a means for establishing / releasing the session sent to the terminal 2 and the authentication for the connection with the local terminal 2 and the function of the input device 1-6 at the remote terminal 1 are locked or unlocked. A connection processing unit 1-8 to be locked, and a PM mode processing unit 1-9 for switching the display processing unit 1-11 and the sound processing unit 1-15 to the power saving mode after the connection is established by the connection processing unit 1-8. have. The PM mode processing unit 1-9 and the display processing unit 1-11 constitute power saving mode means. The PM mode processing unit 1-9 and the sound processing unit 1-15 constitute sound suppression means.
[0027]
  Further, as shown in FIG. 2, the local terminal 2 is input by an input device 2-2 such as a keyboard and a mouse for operating the remote terminal 1 (shown in FIG. 1) and the input device 2-2. The input processing unit 2-3 for processing the input data and the input data 2-4 processed by the input processing unit 2-3 are transmitted to the remote terminal 1 and the display data and sound data of the remote terminal 1 are received. Communication processing unit 2-1, display processing unit 2-6 that processes and outputs display data 2-5 from the communication processing unit 2-1, and display data from the display processing unit 2-6. A display device 2-7 for displaying, a sound processing unit 2-9 for processing and outputting the sound data 2-8 from the communication processing unit 2-1, and a sound data 2-8 from the sound processing unit 2-9 And a sound device 2-10 for outputting sound based on the above.
[0028]
  Next, the configuration and operation of each part of the remote terminal 1 and the local terminal 2 will be described in (1) to (7).
[0029]
  (1)Local terminal communication processor
  3 to 5 are flowcharts for explaining operations related to the communication processing unit 2-1 of the local terminal 2 (shown in FIG. 2), and FIG. 16 is a block diagram showing details of the configuration of the communication processing unit 2-1. Show. The operation of the communication processing unit 2-1 of the local terminal 2 will be described below using the flowcharts of FIGS. 3 to 5 and the block diagram of FIG. As shown in FIG. 16, the communication processing unit 2-1 includes a connection process processing unit 2-1-1, an input process processing unit 2-1-2, and an output process processing unit 2-1-3. Have.
[0030]
  Note that the function of the local terminal 2 in FIG. 1 is activated as one application and operates in a window mode or a full screen mode. In these windows, the desktop image of the remote terminal 1 is displayed. By operating the keyboard and mouse on the local terminal 2, the desktop image can be operated as if the remote terminal 1 is being operated on the spot. it can.
[0031]
  When this application is started, first, the connection process processing unit 2-1-1 (shown in FIG. 16) starts its operation, and inputs a remote terminal name to be operated in step S200 shown in FIG. The dialog is displayed on the display device 2-7. As a result, even when there are a plurality of terminals that can be operated, it becomes possible to remotely operate the necessary terminals.
  Next, the process proceeds to step S201, and after inputting a remote terminal name, the process proceeds to step S202, and a connection request is issued to the remote terminal 1 designated by the remote terminal name input in step S201.
  Thereafter, the process proceeds to step S203, where it is determined whether or not connection is possible. If it is determined that connection cannot be made for some reason, the process returns to step S200. On the other hand, if it is determined in step S203 that connection is possible, the process advances to step S204 to display a passphrase (password information) input dialog.
  Next, the process proceeds to step S205, and after the passphrase is input, the process proceeds to step S206, and the passphrase input in step S205 is transmitted to the remote terminal 1 side.
  Next, the process proceeds to step S207, where it is determined whether or not the authentication is successful based on the passphrase transmitted in step S206. If it is determined that the authentication is not successful, the process returns to step S204 again to enter the passphrase input dialog. Is displayed on the display device 2-7. On the other hand, if it is determined in step S207 that the authentication has succeeded with the correct passphrase, the session with the remote terminal 1 can be started. Therefore, the process proceeds to step S208, where each input / output process is started, that is, the input process process. The unit 2-1-2 and the output process processing unit 2-1-3 are activated to end the processing.
[0032]
  Next, the operation of the input process processing unit 2-1-2 (shown in FIG. 16) will be described according to the flowchart of FIG.
  First, in step S210, data from the remote terminal 1 connected to the communication line 3 is checked. If it is determined in step S211 that no data has been received, the process returns to step S210. If it is determined that data has arrived, the process proceeds to step S212.
  Next, it is determined whether or not the display data is display data in step S212, and if it is display data, the process proceeds to step S213, the display processing unit 2-6 displays the display data on the display device 2-7, and the process returns to step S210. . On the other hand, if it is not display data in step S212, it will progress to step S214.
  Then, in step S214, it is determined whether or not the data is sound data. If the data is sound data, the process proceeds to step S215. After the sound processing unit 2-9 outputs the sound data to the sound device 2-10, the process returns to step S210. .
  On the other hand, if it is determined in step S214 that it is not sound data, the possibility of remaining is a session end message from the remote terminal 1 side, so that the process proceeds to step S216, the output process is ended, and the process ends.
[0033]
  Next, the operation of the output process processing unit 2-1-3 (shown in FIG. 16) will be described with reference to the flowchart of FIG.
  The activated output process checks the input from the keyboard or mouse from the input device 2-2 in step S220. If there is no input in step S221, the process returns to step S220. If there is an input, the process proceeds to step S222. .
  In step S222, it is determined whether or not the session is ended based on the input data. If the input data is a normal keyboard or mouse operation, the process proceeds to step S223, and the input data 2 received from the input processing unit 2-3. -4 is sent to the remote terminal 1 by the communication processing unit 2-1. Then, it returns to step S220 and waits for the next input data.
[0034]
  On the other hand, if the input data is data indicating the end of the session in step S222 (usually takes the form of selecting the application end menu), the process proceeds to step S224, and a session end message is output to the remote terminal 1 side. Next, it progresses to step S225, the process for input is complete | finished, and a process is complete | finished.
[0035]
  (2)Remote terminal communication processor
  Next, operations related to the communication processing unit 1-1 of the remote terminal 1 shown in FIG. 1 will be described. The function of the remote terminal 1 is realized as a server process that is automatically activated when the terminal is started up. The service will not be terminated unless the process is intentionally terminated. This is so that a session can be started immediately when a connection request from the local terminal 2 comes.
[0036]
  The operation of the communication processing unit 1-1 will be described with reference to the flowcharts of FIGS. 6 to 8 and the block diagram of FIG. As shown in FIG. 17, the communication processing unit 1-1 includes a connection process processing unit 1-1-1, an input process processing unit 1-1-2, and an output process processing unit 1-1-3. Have. In a state where a session with the local terminal 2 has not been opened yet, only the connection / process processing unit 1-1-1 is activated and the communication processing unit 1-1 is in a standby state.
[0037]
  In step S300 shown in FIG. 6, the connection request from the local terminal 2 is checked. If it is determined in step S301 that there is no request, the process returns to step S300. If it is determined that there is a connection request, the process proceeds to step S302. Pass phrase is requested, and the pass phrase received from the local terminal 2 is verified in the subsequent step S303. The passphrase is obtained by inquiring the connection processing unit 1-8.
  Next, the process proceeds to step S304, and if it is determined that the passphrase does not match, the process returns to S302 again to request the passphrase again. On the other hand, if the passphrase is determined to match, the process proceeds to step S305 and the connection processing unit Start 1-8.
  Finally, the process proceeds to step S306, where each input / output process is activated, that is, the input process processing unit 1-1-2 and the output process processing unit 1-1-3 are activated, and the processing is completed.
[0038]
  Next, the operation of the input process processing unit 1-1-2 (shown in FIG. 17) will be described with reference to the flowchart of FIG.
  First, in step S310, data from the local terminal 2 is checked. If there is no data in step S311, the process returns to step S310. If there is data, the process proceeds to step S312 to determine whether it is keyboard or mouse input data. In step S313, the input data 1-2 from the local terminal is transferred to the input processing unit 1-3.
  On the other hand, if the input data is not input in step S312, it is a disconnect message for ending the session from the local terminal 2, so the process proceeds to step S314, and a disconnect message is transmitted to the connection processing unit 1-8.
  In step S315, the output process is terminated, that is, the output process processing unit 1-1-3 is terminated. In step S316, the connection process is started, that is, the connection process processing unit 1 -1-1 is started and the process is terminated. At this time, the remote terminal 1 is in a state where it can respond to the connection request from the local terminal 2 again.
[0039]
  Next, the operation of the output process processing unit 1-1-3 (shown in FIG. 17) will be described with reference to the flowchart of FIG.
  First, the data from the remote terminal 1 is checked in step S320. If there is no data in step S321, the process returns to step S320 again. If there is data in step S321, the process proceeds to step S322.
  If the content of the data is display data in step S322, the process proceeds to step S323, the display data 1-12 is transmitted to the local terminal 2, and the process returns to step S320.
  On the other hand, if it is not display data in step S322, the process proceeds to step S324 to check if it is sound data. If it is sound data, the process proceeds to step S325, and the sound data 1-17 is transmitted to the local terminal 2, and the process proceeds to step S320. Return.
  On the other hand, if it is not sound data in step S324, it is a disconnection message for canceling the session, so the process proceeds to step S326, a disconnection message for ending the session is transmitted to the local terminal 2, and the process proceeds to step S327. The process processing unit 1-1-2 for the process is terminated.
  In step S328, the connection process is started, that is, the connection process processing unit 1-1-1 is started, and the process is terminated. At this time as well, the remote terminal 1 is again in a state of responding to a connection request from the local terminal 2.
[0040]
  (3)Remote terminal connection processor
  Next, operations related to the connection processing unit 1-8 of the remote terminal 1 will be described with reference to the flowcharts of FIGS. 9 to 10 and the block diagram of FIG. As shown in FIG. 19, the connection processing unit 1-8 includes a lock / unlock processing unit 1-8-1 as an input lock releasing unit that performs an actual operation inside, and a remote terminal 1 for establishing a session. A passphrase holding area 1-8-2 holding a passphrase for unlocking.
[0041]
  When the connection processing unit 1-8 is activated, it is first determined in step S400 shown in FIG. 9 whether or not the request is a passphrase request from the communication processing unit 1-1. If so, the process proceeds to step S401. A passphrase is acquired from the phrase holding area 1-8-2 and returned to the communication processing unit 1-1.
  On the other hand, if it is not a passphrase request in step S400, the process proceeds to step S402, and the PM mode processing unit 1-9 is activated.
  In step S403, the lock / unlock control unit 1-18-1 activates the input processing unit 1-3 to hook the remote terminal input data 1-7 (by a LOCK (on) message). As a result, all input data from the input device 1-6 including the keyboard and mouse of the remote terminal 1 flows to the connection processing unit 1-8.
  Next, the process proceeds to step S404, the input data of the remote terminal 1 is checked, and if there is any data in step S405, it means that the remote terminal 1 has been operated. Therefore, the process proceeds to step S406 and the passphrase input dialog is displayed. indicate.
  Next, the process proceeds to step S407, and after the passphrase is input, the process proceeds to step S408, where the passphrase input in step S407 is collated with the passphrase stored in the passphrase holding area 1-8-2 in advance. If it is determined in step S409 that the contents do not match, the input is ignored and the process returns to step S404.
  On the other hand, if it is determined in step S409 that the passphrase contents match, in order to perform session disconnection processing at the remote terminal 1, the process proceeds to step S410 shown in FIG. Send.
  Next, the process proceeds to step S411 shown in FIG. 10, and a session disconnection message ENDS (REMOTE) is notified to the PM mode processing unit 1-9. At this time, information indicating a session interruption from the remote terminal 1 is also transmitted.
  Finally, the process proceeds to step S412, where the hook of the local terminal input data 1-2 performed for the input processing unit 1-3 is released (by a LOCK (off) message), and the process is terminated.
  On the other hand, if there is no data in step S405 shown in FIG. 9, the process proceeds to step S413, where a disconnect message from the communication processing unit 1-1 is checked. If no disconnect message has been received in step S414, step S404 is performed. Return to the process. On the other hand, if a disconnect message is received in step S414, a session interruption message ENDS (LOCAL) is notified to the PM mode processing unit 1-9 in step S415.
  Then, the process proceeds to step S412 shown in FIG. 10, the hook of the input data 1-2 that has been performed on the input processing unit 1-3 is released (by a LOCK message), and the process is terminated.
[0042]
  (4)PM mode processing unit of remote terminal
  Next, operations related to the PM mode processing unit 1-9 of the remote terminal 1 will be described with reference to the flowchart of FIG. 11 and the block diagram of FIG. As shown in FIG. 20, the PM mode processing unit 1-9 includes a PM mode control unit 1-9-1, a PM_VIDEO holding area 1-9-2 for holding display and sound power saving modes, and a PM_SOUND holding. Region 1-9-3.
[0043]
  The PM mode processing unit 1-9 is activated by the previous connection processing unit 1-8, and in step S500 shown in FIG. 11, first the display processing unit 1-11 (abbreviated as “display” in FIG. 11) and sound processing. Activate part 1-15.
  Next, the process proceeds to step S501, where the value of PM_VIDEO stored in the PM_VIDEO storage area 1-9-2 is checked. A message PM_ON (PM_VIDEO) is sent to the display processing unit 1-11 so as to shift. On the other hand, if it is disabled at step S501, step S502 is skipped. The value taken by PM_VIDEO is one of SC (ScreenSaver), BL (BLANK), and Disable (invalid).
  Next, the process proceeds to step S503, and the value of PM_SOUND held in the PM_SOUND holding area 1-9-3 is checked. If the value is Enable (valid), the process proceeds to step S504, and the sound processing unit 1-15 receives PM_ON. Send a message. The value of PM_SOUND has only Enable (Disable) and Disable (Disable). On the other hand, if the value of PM_SOUND is disabled in step S503, step S504 is skipped. As described above, the PM mode processing unit 1-9 has a function of starting the power saving mode of the display processing unit 1-11 and the sound processing unit 1-15 in accordance with the power saving mode setting related to display and sound.
  In step S505, the session disconnect message ENDS (LOC) from the connection processing unit 1-8 is checked. If it is determined in step S506 that the disconnect message has not arrived, the process returns to step S505. This loop is usually followed during a remote operation session.
[0044]
  On the other hand, if it is determined in step S506 that a disconnect message has arrived, the process proceeds to step S507, and if the PM_VIDEO value held in the PM_VIDEO holding area 1-9-2 is not Disable (invalid), the process proceeds to step S508.
  In step S508, a power saving mode stop message PM_OFF (PM_VIDEO, LOC) is sent to the display processing unit 1-11. On the other hand, if the value of PM_VIDEO held in the PM_VIDEO holding area 1-9-2 in step S507 is Disable (invalid), step S508 is skipped. Here, the LOC of the argument indicates whether this disconnection message is a request from the local terminal 2 (LOCAL) or a request from the remote terminal 1 side (REMOTE).
  Next, the process proceeds to step S509, and if the value of PM_SOUND held in the PM_SOUND holding area 1-9-3 is not Disable (invalid), the process proceeds to step S510, and the message PM_OFF is sent to the sound processing unit 1-15. On the other hand, if it is Disable in step S509, step S510 is skipped.
  Finally, the process proceeds to step S511, where a session end message ENDS is transmitted to the display processing unit 1-11 and the sound processing unit 1-15, and the process ends.
[0045]
  (5)Display processing unit of remote terminal
  Next, the operation of the display processing unit 1-11 of the remote terminal 1 will be described using the flowcharts of FIGS. 12 and 13 and the block diagram of FIG. As shown in FIG. 21, the display processing unit 1-11 includes a display command control unit 1-11-1, a PM operation unit 1-11-2, a VRAM 1-11-3, and a frame buffer 1-11-4. A display mode (DM) holding area 1-11-5 and a display controller 1-11-6.
[0046]
  After the display processing unit 1-11 is started from the PM mode processing unit 1-9, it is first stored in the VRAM 1-11-3 by the display command control unit 1-11-1 in step S600 shown in FIG. The current desktop image is transferred to the communication processing unit 1-1 as display data 1-12. As a result, the desktop image of the remote terminal 1 in the initial state is displayed on the screen of the local terminal 2.
  In step S601, the DM value in the display mode (DM) holding area 1-11-5 is initialized to NORMAL. This is because the contents of the remote screen are displayed on the remote terminal 1 as they are in the initial state.
  In step S602, the display instruction 1-10 is checked. If there is a display instruction in step S603, the display content is updated. At this time, in step S604, the contents of the DM in the display mode (DM) holding area 1-11-5 are checked. If the DM is not SC (ScreenSaver), the process proceeds to step S606, and the display command is directly used as VRAM1. -11-3, the contents of the same display data are transferred to the communication processing unit 1-1 in step S607, and the process returns to step S602. The content of DM in the display mode (DM) holding area 1-11-5 is other than SC when the content of the PM_VIDEO holding area 1-9-2 is Disable or BL, that is, the power saving mode is set. When the screen is not turned on and when the screen is turned off (or the backlight is turned off).
  On the other hand, if the DM of the display mode (DM) holding area 1-11-5 is SC in step S604, the screen saver is activated on the screen of the remote terminal 1, so the update of the VRAM 1-11-3 is If not, the process proceeds to step S605, and instead, the display command is written into the frame buffer to update the frame buffer (refer to step S614 for initialization of the frame buffer). In step S607, the update content is transferred to the communication processing unit 1-1, and the process returns to step S602.
  If there is no display data in step S603, the process proceeds to step S608, where the data from the PM mode processing unit 1-9 is checked. If there is no data in step S609, the process returns to step S602. Proceed to step S610.
  In step S610, it is determined whether or not the data from the PM mode processing unit 1-9 is a session disconnect message ENDS. If so, the process ends, whereas if it is not a session disconnect message, The process proceeds to step S611 shown in FIG.
  In step S611 of FIG. 13, it is checked whether it is a PM_ON (PM_VIDEO) message. If so, the process proceeds to step S612, and the value of the display mode (DM) holding area 1-11-5 is set. The value of PM_VIDEO is used. Possible values here can be SC or BL.
  Next, the process proceeds to step S613, and the DM value in the display mode (DM) holding area 1-11-5 is checked. If it is not SC (that is, BL), the process proceeds to step S616, and the PM operating unit 1-11-2. Command the display controller 1-11-6 to turn off the output signal, or turn off the liquid crystal backlight if the model is equipped with a liquid crystal panel such as a notebook. Thereby, since the screen display on the remote terminal 1 side disappears thereafter, the operation content on the remote terminal 1 becomes invisible from the outside. Thereafter, the process returns to step S601 in FIG.
  On the other hand, if the DM of the display mode (DM) holding area 1-11-5 is SC in step S613, it is necessary to start the screen saver. Therefore, the process proceeds to step S614 first, and the display command control unit 1-11 -1 copies the contents of VRAM 1-11-3 to frame buffer 1-11-4.
  In step S615, the screen saver is activated and displayed on the remote screen, and the process returns to step S601 in FIG. After that, the display command control unit 1-11-1 is controlled so that the operation content on the remote screen is updated in the frame buffer 1-11-4. In the remote terminal 1, only the screen saver is activated and executed. Will look like.
[0047]
  If a PM_OFF (PM_VIDEO, LOC) message has arrived in step S611, processing to end the power saving mode is performed. That is, the process proceeds to step S617 to check whether the argument PM_VIDEO is SC or not. If so, the screen saver is terminated in step S618.
  In step S619, the display command control unit 1-11-1 copies the contents of the frame buffer 1-11-4 to the VRAM 1-11-3. In a succeeding step S620, it is determined whether or not the argument LOC is LOCAL. That is, it is determined whether the session is interrupted from the local terminal 2 or the remote terminal 1. And if it is interruption from the local terminal 2, it will progress to step S621 and will start a screen saver again. If this is an interruption from the local terminal 2, there is a time lag before the user returns to the remote terminal 1, so it is better to activate the screen saver during that time. After that, if it is a disconnection request from the remote terminal 1 in step S620 in FIG. 12, nothing is done (the screen saver is not activated), and the process returns to step S601 in FIG. This is because it is a disconnection request from the remote terminal 1, and the user is likely to continue to use the remote terminal 1.
[0048]
  On the other hand, if the argument PM_VIDEO is BL (BLANK) in step S617, the process similarly proceeds to step S622 to determine whether the argument LOC is LOCAL. That is, it is determined whether the session interruption request is from the remote terminal 1 or the local terminal 2. In the case of disconnection from the local terminal 2 in step S622, nothing is done, that is, the screen returns to step S601 in FIG. On the other hand, if the remote terminal 1 is disconnected in step S622, the output signal is turned on in step S623 so that the remote terminal 1 can be used immediately, or the backlight of the liquid crystal panel is turned on in the case of a notebook or the like. After that, the process returns to step S601 in FIG.
[0049]
  (6)Sound processing part of remote terminal
  Next, the operation of the sound processing unit 1-15 of the remote terminal 1 will be described using the flowchart of FIG. 14 and the block diagram of FIG. As shown in FIG. 22, the sound processing unit 1-15 includes a sound command control unit 1-15-1, a PM operation unit 1-15-2, a sound controller 1-15-3, and a sound mode (SM ) Holding region 1-15-4.
[0050]
  When activated from the PM mode processing unit 1-9, the sound command control unit 1-15-1 initializes the SM in the sound mode (SM) holding area 1-15-4 to NORMAL in step S700 shown in FIG. .
  In step S701, the sound command 1-14 is checked. If there is a sound command in step S702, the flow advances to step S703 to determine whether the sound mode SM is MUTE (silence). If NO in step S703, the flow advances to step S704 to output the sound command 1-14 from the sound command control unit 1-15-1 to the sound controller 1-15-3, and finally output the sound. The sound of the remote terminal 1 is sent to the device 1-16.
  On the other hand, if the sound mode SM is MUTE in step S703, the subsequent step S704 is skipped, so that no sound is played back on the remote terminal 1. In either case, the sound data 1-17 is transferred to the communication processing unit 1-1 in the next step S705, so that the sound is reproduced on the local terminal 2. Finally, the process returns to step S701.
[0051]
  If there is no sound data in step S702, the process proceeds to step S706 to check the data from the PM mode processing unit 1-9, and if there is no data in step S707, the process returns to step S701. On the other hand, if there is data in step S707, the process proceeds to step S708 to check whether it is a session disconnection request ENDS. If not, the remaining possibility is only PM_ON or PM_OFF. In step S709, it is determined whether PM_ON is set. If PM_ON is set, the SM in the sound mode (SM) holding area 1-15-4 is set to MUTE in step S710, and the process returns to step S701. Subsequent sound reproduction is muted on the remote terminal 1 side, and is sent only to the local terminal 2 side for reproduction.
  On the other hand, if it is determined in step S709 that it is not PM_ON, that is, PM_OFF, the process proceeds to step S711, the SM in the sound mode (SM) holding area 1-15-4 is returned to NORMAL, and the process returns to step S701. That is, the subsequent sound reproduction is performed as usual on the remote terminal 1 side.
  If there is a session disconnection request ENDS in step S708, the process is terminated as it is.
[0052]
  As can be seen from steps S510 and S511 of the PM mode processing unit 1-9 in FIG. 11, at the end of the session, the session disconnection request ENDS is transmitted after PM_OFF is once performed. Therefore, in the case of sound, unlike the display, whether the request for session termination is from the local terminal 2 or from the remote terminal 1, the sound is returned to the reproducible state and terminated without particular distinction. This is because sound reproduction occurs in conjunction with the operation of the remote terminal 1, and there is no possibility that sound will already be generated when the remote operation from the local terminal 2 is finished. This is because it is not necessary to mute the playback.
[0053]
  (7)Input processing unit of remote terminal
  Operations related to the input processing unit 1-3 of the remote terminal 1 will be described with reference to the flowchart of FIG. 15 and the block diagram of FIG. As shown in FIG. 18, the input processing unit 1-3 includes an input data control unit 1-3-1 and an input mode (IM) holding area 1-3-2.
[0054]
  The input processing unit 1-3 is activated by the previous connection processing unit 1-8, and initializes the value of IM in the input mode (IM) holding area 1-3-2 to NORMAL in step S800.
  Next, the process proceeds to step S801, where input data is checked. If there is no data in step S802, the process returns to S801. On the other hand, if there is data in step S802, the process proceeds to step S803 to check whether it is a LOCK switching instruction from the connection processing unit 1-8. The LOCK switching instruction is sent in the form of LOCK (ON) or LOCK (OFF).
  If it is a LOCK switching instruction in step S803, the process proceeds to step S804, and the IM value in the input mode (IM) holding area 1-3-2 is changed to NORMAL (when switching is on) or LOCK (when switching is off). Then, the process returns to step S801.
  On the other hand, if it is not a LOCK switching instruction in step S803, the process proceeds to step S805 to check whether the input is remote terminal data 1-7 and IM = LOCK. The terminal input data 1-7 is transferred to the connection processing unit 1-8, and the process returns to step S801. As a result, the input of the remote terminal 1 is locked. On the other hand, if the condition does not match in step S805, the input data is transferred to the operating system 1-5 (OS in FIG. 15) in step S807, and the process returns to step S801.
[0055]
  In this way, during the session in which the remote terminal 1 is remotely operated from the local terminal 2 via the communication line 3, the local terminal is displayed on the screen of the remote terminal 1 by the display processing unit 1-11 as the display control means of the remote terminal 1. Since the screen content (screen saver) different from the screen 2 is displayed, secret information such as privacy can be easily protected on the remote terminal 1 side.
[0056]
  Further, during the remote operation session, the remote terminal 1 is set to the power saving mode by setting the screen of the remote terminal 1 to the power saving mode by the PM mode processing unit 1-9 and the display processing unit 1-11 as the power saving mode means of the remote terminal 1. It is possible to protect confidential information such as privacy on the side, and to reduce power consumption by reducing display power on the remote terminal 1 side.
[0057]
  Further, during the remote operation session, the remote terminal 1 is controlled by suppressing the sound generation on the remote terminal 1 side by the PM mode processing unit 1-9 and the sound processing unit 1-15 as sound suppression means of the remote terminal 1. Side power saving and noise prevention.
[0058]
  In addition, the lock / unlock control unit 1-8-1 as the input lock release means of the remote terminal 1 releases the lock state of the input on the remote terminal 1 side by inputting a passphrase that is password information. The lock state of the input of the remote terminal 1 can be released on the remote terminal 1 side.
[0059]
  Also, when the input lock state of the remote terminal 1 is released, the remote operation session between the remote terminal 1 and the local terminal 2 is canceled by the communication processing unit 1-1 as a session release means of the remote terminal 1. Therefore, even if you forget to cut off the remote operation session and inadvertently return to your remote terminal 1, you can disconnect the remote operation session automatically by unlocking the input, and you can operate your remote terminal 1 immediately. Therefore, the operability is improved.
[0060]
【The invention's effect】
  As is clear from the above, according to the computer remote operation system of the present invention, when using the remote computer function from another computer (local terminal) at a remote location, using the remote desktop function, Since it is possible to switch to the power saving mode such as turning off the screen of the computer (remote terminal), other people can not see the contents of reading and writing e-mail and reading and writing documents, for example Therefore, privacy can be kept.
[0061]
  In addition to privacy protection, unnecessary screen rewriting of the computer (remote terminal) is not performed during remote operation, which is effective in terms of power saving and display device life. Similarly, since the generation of unnecessary sound can be suppressed, the problem of power saving and noise can also be solved.
[0062]
  In addition, in a system with a remote desktop function that has a function that can lock the input of the computer (remote terminal) during remote operation, even if you forget to disconnect the remote operation session and accidentally return to your computer (remote terminal), The remote operation session can be automatically disconnected by unlocking the keyboard and mouse, so there is no need to go back to the location of another computer (local terminal), and you can continue using your own computer (remote terminal). Because it can be used, time can be saved.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a remote terminal of a computer remote operation system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a local terminal of the computer remote operation system.
FIG. 3 is a flowchart for explaining the operation of the connection process processing unit of the communication processing unit of the local terminal.
FIG. 4 is a flowchart for explaining the operation of the input process processing unit of the communication processing unit of the local terminal.
FIG. 5 is a flowchart for explaining the operation of the output process processing unit of the communication processing unit of the local terminal.
FIG. 6 is a flowchart for explaining the operation of the connection process processing unit of the communication processing unit of the remote terminal.
FIG. 7 is a flowchart for explaining the operation of the input process processing unit of the communication processing unit of the remote terminal.
FIG. 8 is a flowchart for explaining the operation of the output process processing unit of the communication processing unit of the remote terminal.
FIG. 9 is a flowchart for explaining the operation of the connection processing unit of the remote terminal.
FIG. 10 is a flowchart following FIG. 9;
FIG. 11 is a flowchart for explaining the operation of the PM mode processing unit of the remote terminal.
FIG. 12 is a flowchart for explaining the operation of the display processing unit of the remote terminal.
FIG. 13 is a flowchart subsequent to FIG.
FIG. 14 is a flowchart for explaining the operation of the sound processing unit of the remote terminal.
FIG. 15 is a flowchart for explaining the operation of the input processing unit of the remote terminal.
FIG. 16 is a block diagram showing details of the configuration of the communication processing unit of the local terminal.
FIG. 17 is a block diagram showing details of a configuration of a communication processing unit of the remote terminal.
FIG. 18 is a block diagram showing details of the configuration of the input processing unit of the remote terminal.
FIG. 19 is a block diagram showing details of the configuration of the connection processing unit of the remote terminal.
FIG. 20 is a block diagram showing details of the configuration of the PM mode processing unit of the remote terminal.
FIG. 21 is a block diagram showing details of the configuration of the display processing unit of the remote terminal.
FIG. 22 is a block diagram showing details of the configuration of the sound processing unit of the remote terminal.
[Explanation of symbols]
  1 ... Remote terminal,
  2 ... Local terminal,
  3 ... communication line,
  1-1… Communication processing unit,
  1-3 ... Input processing unit,
  1-5 ... operating system,
  1-6 ... Input device,
  1-8… Connection processing part,
  1-9… PM mode processing unit,
  1-11… Display processing unit,
  1-13 ... Display device,
  1-15… Sound processor,
  1-16… Sound output device,
  2-1… Communication processing unit,
  2-2 ... Input device,
  2-3… Input processing unit,
  2-6… Display processing unit,
  2-7… Display device,
  2-9… Sound processor,
  2-10 ... Sound device.

Claims (6)

In a computer remote operation system that remotely operates a remote terminal from a local terminal via a communication line,
The remote terminal
Session establishment means for establishing a remote operation session for the local terminal;
An input device for operating the remote terminal;
Input processing means for processing input data input by the input device;
When a session for remote operation with the local terminal is established by the session establishing means , processing of the input data by the input processing means except for processing of input data representing personal identification information input by the input device Input locking means for locking the function of the input device by not performing,
When the input data representing the secret information is input to the input device, the computer remote operation system characterized by comprising an input unlocking means for unlock state of the input device by the input locking means. In the computer remote operation system according to claim 1,
The remote terminal includes session release means for releasing a remote operation session between the remote terminal and the local terminal when the lock state of the input device is released by the input lock release means. Computer remote operation system. The computer remote operation system according to claim 1 or 2,
The remote terminal
A VRAM in which display data is written;
A display device for displaying the display data written in the VRAM;
Display control for displaying different screen contents from the screen of the local terminal on the screen of the display device without updating the VRAM when a session for remote operation with the local terminal is established by the session establishing means And a computer remote operation system. In the computer remote operation system according to claim 3,
The display control means includes
Holds display information indicating whether the display mode is a display mode for displaying the display data on the screen of the display device or a display mode for displaying a screen saver having a screen content different from the screen of the local terminal on the screen of the display device. Display mode holding means for
Based on the display information representing the display mode held in the display mode holding unit, and a display mode determination means for determining which one of a display mode for displaying the display mode or the screen saver displaying the display data Have
At the time when the session of remote operation of the local terminal is established by the session establishing means, the screen of the display device based on the display information to which the display mode determining means is held in the display mode holding unit A computer remote operation system that executes a screen saver that protects the screen of the display device of the remote terminal when it is determined that the display mode is for displaying a screen saver. In the computer remote operation system according to claim 3 ,
The display control means includes
Display mode holding means for holding display information indicating whether it is a mode for displaying the display data on the screen of the display device or a power saving mode for turning off the screen of the display device;
Display mode determination means for determining whether the display data is in a mode for displaying the display data or the power saving mode based on the display information held in the display mode holding means;
At the time when the session of remote operation of the local terminal is established by the session establishing means, when the display mode determining means determines that the said power saving mode, saving to erase the screen of the display device of the remote terminal A computer remote operation system comprising a power mode means. In the computer remote operation system according to any one of claims 1 to 5,
The remote terminal
A sound device for outputting sound;
Sound mode holding means for holding sound information indicating whether the sound mode is a normal mode in which the sound output of the sound device is a normal output or a suppression mode for suppressing the sound output of the sound device;
Based on the sound information held in the table sound mode holding means, a normal mode in which the sound output of the sound device is a normal output, or a suppression mode in which the sound output of the sound device is suppressed. Sound mode determination means for determining whether there is,
At the time when the session of remote operation of the local terminal is established by the session establishing means, if the sound mode determining means determines that suppresses suppression mode the output sound of the sound device, the sound device A computer remote operation system comprising sound suppression means for suppressing sound output.

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