CN112073539B - KVM switcher with remote management function and switching method - Google Patents
KVM switcher with remote management function and switching method Download PDFInfo
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- CN112073539B CN112073539B CN202011243265.6A CN202011243265A CN112073539B CN 112073539 B CN112073539 B CN 112073539B CN 202011243265 A CN202011243265 A CN 202011243265A CN 112073539 B CN112073539 B CN 112073539B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
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Abstract
The invention discloses a KVM switcher with a remote management function and a switching method, wherein the KVM switcher with the remote management function comprises a first interface module, a processing module and a network interface module; the plurality of hosts are connected with a first interface module of the KVM switcher; the plurality of remote control devices are connected with a network interface module of the KVM switcher through the Internet; the above embodiment can remotely operate the KVM switch and the host computer connected thereto, and is simple to operate and has no distance requirement limitation.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to a KVM switch with remote management function and a switching method thereof.
Background
A KVM switch, generally abbreviated as KVM, is an abbreviation of a Keyboard, a display, and a Mouse (Keyboard, Video, Mouse), and is a set of the Keyboard, the display, and the Mouse, and controls a plurality of computers. Typically, the distance between the KVM switch and the computer being controlled is very limited due to the attenuation of the computer-to-peripheral signal. The KVM switch is connected to a plurality of computer devices, and the operation and maintenance personnel need to go to the computer room when operating the KVM switch or the computer, so the operation on the KVM switch and the controlled computer is very complicated.
Disclosure of Invention
The present invention provides a KVM switch with remote management function and a switching method thereof, which can remotely operate the KVM switch and the computer connected thereto, and is simple to operate and free from distance requirement limitation.
The invention provides a KVM switcher with a remote management function, which comprises a first interface module, a processing module and a network interface module; the plurality of hosts are connected with a first interface module of the KVM switcher; the plurality of remote control devices are connected with a network interface module of the KVM switcher through the Internet;
the plurality of hosts send the analog signals to the first interface module, and the first interface module converts the analog signals of the hosts into digital signals and sends the digital signals to the processing module; the processing module sends the digital signals of each host to the network interface module; the network interface module converts the digital signals into IP data packets and sends the IP data packets to a plurality of remote control devices through the Internet;
the remote control equipment decodes the IP data packet and recombines the IP data packet into a digital signal, and then converts the digital signal into an analog signal to be sent to a screen of the remote control equipment; when the remote control equipment sends a control signal through a keyboard and a mouse of the remote control equipment, the remote control equipment converts the control signal into an IP control signal data packet and sends the IP control signal data packet to the network interface module through the Internet;
the network interface module decodes the IP control signal data packets, recombines the IP control signal data packets into a digital control signal and sends the digital control signal to the processing module, and the processing module sends the digital control signal to the first interface module; the first interface module converts the digital control signal into an analog control signal and sends the analog control signal to the host, and the host makes corresponding action after receiving the analog control signal.
Preferably, the remote control device may implement control of a given host computer through the internet.
Preferably, the remote control device may display the transmission information of the designated host by the designated remote control device through the internet.
Preferably, when a certain remote control device needs to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control locking signal and a remote control device ID number to the network interface module of the KVM switch through the internet, and the network interface module decodes and recombines the IP control signal data packet containing the remote control locking signal and the remote control device ID number into a digital control signal containing the remote control locking signal and the remote control device ID number and sends the digital control signal to the processing module; when the processing module receives the digital control signal, if the digital control signal contains a remote control locking signal, judging whether the processing module sets a locking mark, if the digital control signal does not set the locking mark, the remote control locking signal writes the ID number of the remote control equipment into the memory, and sets the locking mark, so that the KVM switcher is in a control information locking state;
when the KVM switcher is in a state of receiving control information locking, the remote control device locking the KVM switcher sends an IP control signal data packet containing a remote control device ID number, a controlled host ID number and a controlled host action control signal to the network interface module through the Internet, and the network interface module decodes and recombines the IP control signal data packet containing the remote control device ID number, the controlled host ID number and the controlled host action control signal into a digital control signal containing the remote control device ID number, the controlled host ID number and the controlled host action control signal and sends the digital control signal to the processing module; when the processing module receives the digital control signal sent by the network interface module, the processing module compares the ID number of the remote control equipment in the digital control signal with the ID number of the remote control equipment in the memory, and if the same processing module sends the digital control signal containing the action control signal of the controlled host to the first interface module according to the ID number of the controlled host; the first interface module converts a digital control signal containing a controlled host action control signal into an analog control signal containing a controlled host action control signal and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal;
when a certain remote control device needs to be unlocked to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control unlocking signal, a remote control device ID number and a controlled host ID number to a network interface module through the Internet, and the network interface module decodes and recombines the IP control signal data packets containing the remote control unlocking signal, the remote control device ID number and the controlled host ID number into a digital control signal containing the remote unlocking signal, the remote control device ID number and the controlled host ID number and sends the digital control signal to a processing module; when the processing module receives the digital control signal, if the digital control signal contains a remote control unlocking signal, whether the processing module sets a locking mark is judged, if the locking mark is set, the processing module compares the ID number of the remote control device of the digital control signal with the ID number of the remote control device stored in the memory, if the same processing module clears the locking mark, and the KVM switch is in a state of receiving control information unlocking.
Preferably, when the KVM switch is in a locked state for receiving control information of other remote control devices, the remote control device sends an IP control signal packet containing a remote control device ID number, a controlled host action control signal, and a remote control device ID number capable of receiving an IP data packet to the network interface module through the internet, and the network interface module decodes and recombines the IP control signal packet containing the remote control device ID number, the controlled host action control signal, and the remote control device ID number capable of receiving the IP data packet into a digital control signal containing the remote control device ID number, the controlled host action control signal, and the remote control device ID number capable of receiving the IP data packet to the processing module; when the processing module receives the digital control signal sent by the network interface module, the processing module compares the ID number of the remote control equipment in the digital control signal with the ID number of the remote control equipment in the memory, and if the same processing module sends the digital control signal containing the action control signal of the controlled host to the first interface module according to the ID number of the controlled host; the first interface module converts a digital control signal containing a controlled host action control signal into an analog control signal containing a controlled host action control signal and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal; the processing module sends the digital signals of the controlled host sent by the first interface module and the processing unit to the network interface module according to the ID number of the controlled host in the digital control signals containing the ID number of the remote control equipment, the ID number of the controlled host, the action control signal of the controlled host and the ID number of the remote control equipment for receiving the IP data packet, the network interface module converts the digital signals sent by the controlled host into the IP data packet and sends the IP data packet to the remote control equipment appointed to receive the IP data packet through the Internet according to the ID number of the remote control equipment capable of receiving the IP data packet.
Preferably, the KVM switch further comprises a second interface module, and the KVM switch is connected to the plurality of slave devices through the second interface module; the processing module sends the digital signals of each host to the second interface module, and the second interface module can convert the digital signals into analog signals and send the analog signals to the plurality of slave devices.
Preferably, the remote control device may enable communication between a designated host and a designated slave device via the internet.
Preferably, when the KVM switch is in a locked state for receiving control information of other remote control devices, the remote control device transmits an IP control signal packet including a remote control device ID number, a controlled host action control signal, and a controlled slave ID number to the network interface module via the internet, and the network interface module decodes and reassembles the IP control signal packet including the remote control device ID number, the controlled host action control signal, and the controlled slave ID number into a digital control signal including the remote control device ID number, the controlled host action control signal, and the controlled slave ID number to the processing module; the processing module compares the ID number of the remote control equipment in the digital control signal with the ID number of the remote control equipment in the memory, and if the same processing module sends the digital control signal containing the action control signal of the controlled host to the first interface module according to the ID number of the controlled host; the first interface module converts a digital control signal containing a controlled host action control signal into an analog control signal containing a controlled host action control signal and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal; the controlled host sends an analog signal to the processing module through the first interface module, the processing module sends a digital signal formed by converting the analog signal sent by the controlled host to the second interface module according to the ID number of the controlled slave device, and the second interface module converts the digital signal into the analog signal and sends the analog signal to the designated slave device.
Preferably, the KVM switch includes a first interface module, a processing module, a network interface module, and a second interface module, and the plurality of hosts are connected to the first interface module of the KVM switch; the plurality of remote control devices are connected with a network interface module of the KVM switcher through the Internet, and the KVM switcher is connected with the plurality of slave devices through a second interface module;
the first interface module is a USB-to-serial port module, the processing module is a multi-path serial port buffer output module, the second module is a serial port-to-USB module, and the network interface module is a network interface and switching control module.
The USB-to-serial port module converts USB signals of a multi-path host into TTL serial port signals and sends the TTL serial port signals to the multi-path serial port buffer output module, the multi-path serial port buffer output module selects the multi-path serial port signals input by the USB-to-serial port module according to the input of the network interface and the switching control module, then inputs one path of signals to the serial port-to-USB module, the serial port-to-USB signals convert the serial port signals into USB signals to be output, and the remote control device controls the network interface and the switching control module through the Internet.
The invention also provides a KVM switching method with a remote management function, which comprises the following steps:
step S100: the plurality of hosts send the analog signals to a first interface module of the KVM switcher; the first interface module converts the analog signals of each host into digital signals and sends the digital signals to the processing module of the KVM switcher; the processing module sends the digital signals of the hosts to a network interface module of the KVM switcher; the network interface module converts the digital signals into IP data packets and sends the IP data packets to a plurality of remote control devices through the Internet;
step S200: the remote control equipment decodes the IP data packet and recombines the IP data packet into a digital signal, and then converts the digital signal into an analog signal to be sent to a screen of the remote control equipment; when the remote control equipment sends a control signal through a keyboard and a mouse of the remote control equipment, the remote control equipment converts the control signal into an IP control signal data packet and sends the IP control signal data packet to the network interface module through the Internet;
step S300: the network interface module decodes the IP control signal data packets, recombines the IP control signal data packets into a digital control signal and sends the digital control signal to the processing module, and the processing module sends the digital control signal to the first interface module; the first interface module converts the digital control signal into an analog control signal and sends the analog control signal to the host, and the host makes corresponding action after receiving the analog control signal.
The invention can remotely operate the KVM switcher and the computer connected with the KVM switcher, and has simple operation and no distance requirement limitation.
Drawings
FIG. 1 is a block diagram of a first KVM switch with remote management function according to the present invention;
FIG. 2 is a block diagram of a second KVM switch with remote management function according to the present invention;
FIG. 3 is a block diagram of a KVM switch with remote management function according to a third embodiment of the present invention;
FIG. 4 is a flowchart of a KVM switch method with remote management function according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a block diagram illustrating a first KVM switch with remote management function according to the present invention.
The present invention provides a KVM switch with remote management function, the KVM switch 20 comprises a first interface module 21, a processing module 22 and a network interface module 24; several hosts are connected to the first interface module 21 of the KVM switch 20; a plurality of remote control devices are connected with the network interface module 24 of the KVM switcher through the internet;
the plurality of hosts send analog signals to a first interface module 21 of the KVM switch, and the first interface module 21 converts the analog signals of the hosts into digital signals and sends the digital signals to a processing module 22 of the KVM switch; the processing module 22 sends the digital signals of the respective hosts to the network interface module 24 of the KVM switch; the network interface module 24 converts the digital signals into IP data packets, and transmits the IP data packets to a plurality of remote control devices through the internet;
the remote control equipment decodes the IP data packet and recombines the IP data packet into a digital signal, and then converts the digital signal into an analog signal to be sent to a screen of the remote control equipment; when the remote control device sends a control signal through its keyboard and mouse, the remote control device converts the control signal into an IP control signal packet and sends the IP control signal packet to the network interface module 24 of the KVM switch through the internet;
the network interface module 24 decodes and recombines the IP control signal data packets into digital control signals to be sent to the processing module 22, and the processing module 22 sends the digital control signals to the first interface module 21; the first interface module 21 converts the digital control signal into an analog control signal and sends the analog control signal to the host, and the host performs a corresponding action after receiving the analog control signal.
The above embodiment can remotely operate the KVM switch and the host computer connected thereto, and is simple to operate and has no distance requirement limitation.
Further, the remote control device may control the designated host through the internet, specifically:
when a certain remote control device needs to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control locking signal and a remote control device ID number to the network interface module 24 of the KVM switch through the Internet, and the network interface module 24 decodes and recombines the IP control signal data packet containing the remote control locking signal and the remote control device ID number into a digital control signal containing the remote control locking signal and the remote control device ID number and sends the digital control signal to the processing module 22; when the processing module 22 receives the digital control signal, if the digital control signal includes the remote control lock signal, it determines whether the processing module 22 sets the lock flag, and if the lock flag is not set, the remote control lock signal writes the ID number of the remote control device into the memory, and sets the lock flag, so that the KVM switch 20 is in a lock state of receiving the control information of other remote control devices. When the processing module 22 receives the digital control signal, if the digital control signal includes a remote control locking signal, it determines whether the processing module 22 sets a locking flag, and if the digital control signal includes the remote control locking signal, the processing module 22 discards the digital signal.
When the processing module 22 receives the digital control signal, if there is no remote control locking signal in the digital control signal and the processing module 22 does not set a locking flag, the processing module 22 sends the digital control signal to the first interface module 21; the first interface module 21 converts the digital control signal into an analog control signal and sends the analog control signal to the host, and the host performs a corresponding action after receiving the analog control signal.
When a certain remote control device needs to be unlocked to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control unlocking signal, a remote control device ID number and a controlled host ID number to the network interface module 24 through the Internet, and the network interface module 24 decodes and recombines the IP control signal data packets containing the remote control unlocking signal, the remote control device ID number and the controlled host ID number into a digital control signal containing the remote unlocking signal, the remote control device ID number and the controlled host ID number and sends the digital control signal to the processing module 22;
when the processing module 22 receives the digital control signal, if the digital control signal includes the remote control unlocking signal, it determines whether the processing module 22 sets the locking flag, if the locking flag is set, the processing module 22 compares the ID number of the remote control device of the digital control signal with the ID number of the remote control device stored in the memory, and if the same processing module is set, the locking flag is cleared, and the KVM switch is in the unlocking state for receiving the control information. When the processing module 22 receives the digital control signal, if the digital control signal includes the remote control unlocking signal, it is determined whether the processing module 22 sets the locking flag, and if the locking flag is not set, the digital control signal is discarded.
When the processing module 22 receives the digital control signal, if there is no remote control locking signal or remote control unlocking signal in the digital control signal and the processing module 22 is provided with a locking flag, when the processing module 22 receives the digital control signal sent by the network interface module 24, the processing module 22 compares the remote control device ID number in the digital control signal with the remote control device ID number in the memory, if the remote control device ID numbers are the same, the digital control signal is received, and if the remote control device ID numbers are not the same, the digital control signal is discarded.
When the processing module 22 receives the digital control signal, if there is no remote control locking signal or remote control unlocking signal in the digital control signal and the processing module 22 is provided with a locking flag, when the processing module 22 receives the digital control signal sent by the network interface module 24, the processing module 22 compares the remote control device ID number in the digital control signal with the remote control device ID number in the memory, and if the digital control signal is the same, the processing module receives the digital control signal, specifically:
when the KVM switch 20 is in the locked state of receiving the control information of other remote control devices, the remote control device that locks the KVM switch sends an IP control signal packet containing the ID number of the remote control device, the ID number of the controlled host, and the operation control signal of the controlled host to the network interface module 24 via the internet, and the network interface module 24 decodes and reassembles the IP control signal packet containing the ID number of the remote control device, the ID number of the controlled host, and the operation control signal of the controlled host into a digital control signal containing the ID number of the remote control device, the ID number of the controlled host, and the operation control signal of the controlled host to the processing module 22; when the processing module 22 receives the digital control signal sent by the network interface module 24, the processing module 22 compares the ID number of the remote control device in the digital control signal with the ID number of the remote control device in the memory, and if the same processing module 22 sends the digital control signal containing the controlled host motion control signal to the first interface module 23 according to the ID number of the controlled host; the first interface module 23 converts the digital control signal containing the controlled host motion control signal into an analog control signal containing the controlled host motion control signal, and sends the analog control signal to the controlled host, and the controlled host performs a corresponding motion after receiving the analog control signal.
The remote control equipment can remotely control any computer host at any time and any place, and when a certain remote control equipment controls a specified controlled computer, the KVM switcher is locked, so that the situation that other remote equipment and local equipment operate the KVM switcher at the same time is avoided, and misoperation is generated.
Furthermore, the remote control device can realize that the designated remote control device displays the designated host to send information through the internet, namely when a certain remote control device controls the designated controlled computer, the KVM switch is locked, so that other remote devices and the local device are prevented from operating the remote control device at the same time, and meanwhile, the KVM switch can be designated to send the IP data packet to the designated remote control device through the internet. The remote control device decodes and reassembles the IP data packets into digital signals, which are then converted to analog signals for transmission to the screen of the remote control device.
Specifically, when the KVM switch 20 is in the locked state of receiving the control information of other remote control devices, the remote control device sends an IP control signal packet including the ID number of the remote control device, the ID number of the controlled host, the action control signal of the controlled host, and the ID number of the remote control device capable of receiving the IP data packet to the network interface module 24 through the internet, and the network interface module 24 decodes and reassembles the IP control signal packet including the ID number of the remote control device, the ID number of the controlled host, the action control signal of the controlled host, and the ID number of the remote control device capable of receiving the IP data packet into a digital control signal including the ID number of the remote control device, the ID number of the controlled host, the action control signal of the controlled host, and the ID number of the remote control device capable of receiving the IP data packet to the processing module 22; when the processing module 22 receives the digital control signal sent by the network interface module, the processing module compares the ID number of the remote control device in the digital control signal with the ID number of the remote control device in the memory, and if the same processing module sends the digital control signal containing the controlled host motion control signal to the first interface module 21 according to the ID number of the controlled host; the first interface module 21 converts the digital control signal containing the controlled host action control signal into an analog control signal containing the controlled host action control signal, and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal; the processing module 22 sends the digital signal of the controlled host sent by the first interface module 21 and the processing unit 22 to the network interface module 24 according to the ID number of the controlled host in the digital control signal, and the network interface module 34 converts the digital signal sent by the controlled host into an IP data packet and sends the IP data packet to a remote control device designated to receive the IP data packet through the internet according to the ID number of the remote control device capable of receiving the IP data packet.
Referring to fig. 2, fig. 2 is a block diagram illustrating a second KVM switch with remote management function according to the present invention.
The second embodiment differs from the first embodiment in that the KVM switch 20 further includes a second interface module 23, and the KVM switch 20 is connected to a plurality of slave devices through the second interface module 23; the processing module 22 sends the digital signal of each host to the second interface module 23, and the second interface module 23 can convert the digital signal into an analog signal and send the analog signal to a plurality of slave devices.
The above embodiment can remotely manage the KVM switch, the host computer connected with the KVM switch, and the slave device, so as to realize information interaction between the host computer and the slave device.
Further, the remote control device may implement communication between the designated host and the designated slave device via the internet, specifically:
when the KVM switch 20 is in the locked state of receiving the control information of other remote control devices, the remote control device sends an IP control signal packet including a remote control device ID number, a controlled host action control signal, and a controlled slave ID number to the network interface module 24 via the internet, and the network interface module 24 decodes and reassembles the IP control signal packet including the remote control device ID number, the controlled host action control signal, and the controlled slave ID number into a digital control signal including the remote control device ID number, the controlled host action control signal, and the controlled slave ID number to the processing module 22; the processing module 22 compares the ID number of the remote control device in the digital control signal with the ID number of the remote control device in the memory, and if the same processing module sends the digital control signal including the controlled host motion control signal to the first interface module 21 according to the ID number of the controlled host; the first interface module 21 converts the digital control signal containing the controlled host action control signal into an analog control signal containing the controlled host action control signal, and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal; the controlled host sends an analog signal to the processing module 22 through the first interface module 21, the processing module 22 sends a digital signal formed by converting the analog signal sent by the controlled host to the second interface module 23 according to the ID number of the controlled slave, and the second interface module 23 converts the digital signal into an analog signal and sends the analog signal to the specified slave.
Referring to fig. 3, fig. 3 is a block diagram illustrating a KVM switch with remote management function according to a third embodiment of the present invention.
The present invention provides a KVM switch with remote management function according to a third embodiment, which includes a first interface module 21, a processing module 22, a network interface module 24 and a second interface module 23, wherein a plurality of hosts are connected to the first interface module 21 of the KVM switch; the plurality of remote control devices are connected with a network interface module 24 of the KVM switch through the Internet, and the KVM switch is connected with the plurality of slave devices through a second interface module 23;
the first interface module 21 is a USB to serial port module, the processing module 22 is a multi-channel serial port buffer output module, the second module 23 is a serial port to USB module, and the network interface module 24 is a network interface and switching control module.
The USB-to-serial module 21 converts the USB signals of the multi-channel host into TTL serial signals and sends the TTL serial signals to the multi-channel serial buffer output module 22, the multi-channel serial buffer output module 22 selects the multi-channel serial signals input by the USB-to-serial module 21 according to the input of the network interface and the switching control module 24, then inputs one channel of signals to the serial-to-USB module 24, the serial-to-USB signals 23 convert the serial signals into USB signals to be output, and the remote control device controls the network interface and the switching control module 24 through the Internet.
The serial port-to-USB module 23 is composed of a special serial port-to-USB chip, and converts a USB signal output by the host 1 into serial port signals TX1 and RX1 of TTL level; the host 2 outputs serial port signals TX2 and RX2 of which the USB signals are converted into TTL levels; by analogy, the USB signal output by the host n is converted into serial port signals TXn and RXn of TTL level;
in the multi-path serial port buffer output module 2, the TX1 is controlled to be output by an enable signal OE1 output by the MCU through a tri-state buffer gate, an enable OE1 effective TX1 is output to a TX signal, an enable OE1 is invalid, and the output end of the buffer is connected to the TX in a high-resistance state without influence on the TX signal; the serial port signal TX2 is controlled to be output by an enable signal OE2 output by the MCU through a tri-state buffer gate, an enable OE2 is effective, TX2 is output to the TX signal, an enable OE2 is ineffective, and the output end of the buffer is connected to TX in a high-impedance state, so that the TX signal is not influenced; by parity of reasoning, the serial port signal TXn is controlled to be output by an enable signal OEn output by the MCU through the tri-state buffer gate, the OEn valid TXn is output to the TX signal, the enable OEn is invalid, the buffer output end is connected to the TX in a high-impedance state, and the TX signal is not influenced;
the output is controlled by an enable signal OE1 output by the MCU through a tri-state buffer gate, an enable OE1 is enabled, RX is output to an RX1 signal, an enable OE1 is disabled, and the output end of the buffer is connected to RX1 in a high-impedance state, so that the RX1 signal is not influenced; the RX signal is controlled to be output by an enable signal OE2 output by the MCU through a tri-state buffer gate, an enable OE2 is effective, the RX is output to an RX2 signal, an enable OE2 is ineffective, and the output end of the buffer is connected to the RX2 in a high-impedance state and has no influence on an RX2 signal; by analogy, the RX signal is controlled to be output by the enable signal OEn output by the MCU through the tri-state buffer gate, the enable OEn is enabled, the RX signal is output to the RXn signal, the enable OEn is disabled, the buffer output terminal is connected to the RXn in a high-impedance state, and there is no influence on the RXn signal.
The network interface and switching control MCU controller judges that the USB slave equipment is switched to a corresponding host by receiving key control information sent by the remote equipment, the switching logic is to detect that a key 1 is pressed down and switch the USB slave equipment to the host 1, and the specific implementation mode is to control an enabling signal OE1 to enable; detecting that the key 2 is pressed, and switching the USB slave equipment to the host 2 by specifically enabling a control enabling signal OE 2; by analogy, detecting that key n is pressed switches the USB slave device to host n, with the specific implementation being that control enable signal OEn is enabled.
Therefore, the host and the slave equipment can be controlled independently and the number of the switching paths of the host can be flexibly and remotely controlled.
Referring to fig. 4, fig. 4 is a flowchart of a KVM switch method with remote management function according to the present invention.
The invention also provides a KVM switching method with a remote management function, which comprises the following steps:
step S100: the plurality of hosts send the analog signals to a first interface module of the KVM switcher; the first interface module converts the analog signals of each host into digital signals and sends the digital signals to the processing module of the KVM switcher; the processing module sends the digital signals of the hosts to a network interface module of the KVM switcher; the network interface module converts the digital signals into IP data packets and sends the IP data packets to a plurality of remote control devices through the Internet;
step S200: the remote control equipment decodes the IP data packet and recombines the IP data packet into a digital signal, and then converts the digital signal into an analog signal to be sent to a screen of the remote control equipment; when the remote control equipment sends a control signal through a keyboard and a mouse of the remote control equipment, the remote control equipment converts the control signal into an IP control signal data packet and sends the IP control signal data packet to the network interface module through the Internet;
step S300: the network interface module decodes the IP control signal data packets, recombines the IP control signal data packets into a digital control signal and sends the digital control signal to the processing module, and the processing module sends the digital control signal to the first interface module; the first interface module converts the digital control signal into an analog control signal and sends the analog control signal to the host, and the host makes corresponding action after receiving the analog control signal.
The above embodiment can remotely operate the KVM switch and the host computer connected thereto, and is simple to operate and has no distance requirement limitation.
The present invention provides a KVM switch with remote management function and a switching method thereof. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A KVM switcher with remote management function is characterized in that the KVM switcher comprises a first interface module, a processing module and a network interface module; the plurality of hosts are connected with a first interface module of the KVM switcher; the plurality of remote control devices are connected with a network interface module of the KVM switcher through the Internet;
the plurality of hosts send the analog signals to the first interface module, and the first interface module converts the analog signals of the hosts into digital signals and sends the digital signals to the processing module; the processing module sends the digital signals of each host to the network interface module; the network interface module converts the digital signals into IP data packets and sends the IP data packets to a plurality of remote control devices through the Internet;
the remote control equipment decodes the IP data packet and recombines the IP data packet into a digital signal, and then converts the digital signal into an analog signal to be sent to a screen of the remote control equipment; when the remote control equipment sends a control signal through a keyboard and a mouse of the remote control equipment, the remote control equipment converts the control signal into an IP control signal data packet and sends the IP control signal data packet to the network interface module through the Internet;
the network interface module decodes the IP control signal data packets, recombines the IP control signal data packets into a digital control signal and sends the digital control signal to the processing module, and the processing module sends the digital control signal to the first interface module; the first interface module converts the digital control signal into an analog control signal and sends the analog control signal to the host computer, and the host computer makes corresponding action after receiving the analog control signal;
the remote control equipment can realize the control of the specified host computer through the internet, and specifically comprises the following steps:
when a certain remote control device needs to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control locking signal and a remote control device ID number to a network interface module of the KVM switch through the Internet, and the network interface module decodes and recombines the IP control signal data packet containing the remote control locking signal and the remote control device ID number into a digital control signal containing the remote control locking signal and the remote control device ID number and sends the digital control signal to a processing module; when the processing module receives the digital control signal, if the digital control signal contains a remote control locking signal, judging whether the processing module sets a locking mark, if the digital control signal does not set the locking mark, the remote control locking signal writes the ID number of the remote control equipment into the memory, and sets the locking mark, so that the KVM switcher is in a control information locking state;
when the KVM switcher is in a state of receiving control information locking, the remote control device locking the KVM switcher sends an IP control signal data packet containing a remote control device ID number, a controlled host ID number and a controlled host action control signal to the network interface module through the Internet, and the network interface module decodes and recombines the IP control signal data packet containing the remote control device ID number, the controlled host ID number and the controlled host action control signal into a digital control signal containing the remote control device ID number, the controlled host ID number and the controlled host action control signal and sends the digital control signal to the processing module; when the processing module receives the digital control signal sent by the network interface module, the processing module compares the ID number of the remote control equipment in the digital control signal with the ID number of the remote control equipment in the memory, and if the same processing module sends the digital control signal containing the action control signal of the controlled host to the first interface module according to the ID number of the controlled host; the first interface module converts a digital control signal containing a controlled host action control signal into an analog control signal containing a controlled host action control signal and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal;
when a certain remote control device needs to be unlocked to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control unlocking signal, a remote control device ID number and a controlled host ID number to a network interface module through the Internet, and the network interface module decodes and recombines the IP control signal data packets containing the remote control unlocking signal, the remote control device ID number and the controlled host ID number into a digital control signal containing the remote unlocking signal, the remote control device ID number and the controlled host ID number and sends the digital control signal to a processing module; when the processing module receives a digital control signal, if the digital control signal contains a remote control unlocking signal, judging whether the processing module sets a locking mark, if the locking mark is set, comparing the ID number of the remote control equipment of the digital control signal with the ID number of the remote control equipment stored in the memory by the processing module, and if the ID numbers of the remote control equipment of the digital control signal and the ID number of the remote control equipment stored in the memory are the same, clearing the locking mark, and enabling the KVM switch to be in a control information receiving unlocking state;
the remote control device can display the information sent by the appointed host through the appointed remote control device through the internet.
2. The KVM switch with remote management function according to claim 1, when the KVM switcher is in a locking state for receiving the control information of other remote control equipment, the remote control equipment sends an IP control signal data packet containing a remote control equipment ID number, a controlled host action control signal and a remote control equipment ID number capable of receiving an IP data packet to the network interface module through the Internet, and the network interface module decodes and recombines the IP control signal data packet containing the remote control equipment ID number, the controlled host action control signal and the remote control equipment ID number capable of receiving the IP data packet into a digital control signal containing the remote control equipment ID number, the controlled host action control signal and the remote control equipment ID number capable of receiving the IP data packet and sends the digital control signal to the processing module; when the processing module receives the digital control signal sent by the network interface module, the processing module compares the ID number of the remote control equipment in the digital control signal with the ID number of the remote control equipment in the memory, and if the same processing module sends the digital control signal containing the action control signal of the controlled host to the first interface module according to the ID number of the controlled host; the first interface module converts a digital control signal containing a controlled host action control signal into an analog control signal containing a controlled host action control signal and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal; the processing module sends the digital signals of the controlled host sent by the first interface module and the processing unit to the network interface module according to the ID number of the controlled host in the digital control signals containing the ID number of the remote control equipment, the ID number of the controlled host, the action control signal of the controlled host and the ID number of the remote control equipment for receiving the IP data packet, the network interface module converts the digital signals sent by the controlled host into the IP data packet and sends the IP data packet to the remote control equipment appointed to receive the IP data packet through the Internet according to the ID number of the remote control equipment capable of receiving the IP data packet.
3. The KVM switch with remote management function according to claim 2, further comprising a second interface module, wherein said KVM switch is connected to a plurality of slave devices through said second interface module; the processing module sends the digital signals of each host to the second interface module, and the second interface module can convert the digital signals into analog signals and send the analog signals to the plurality of slave devices.
4. The KVM switch with remote management function of claim 3, wherein the remote control device is capable of communicating a designated host and a designated slave through the Internet.
5. The KVM switch with remote management function according to claim 4, wherein when the KVM switch is in the locked state for receiving the control information of other remote control devices, the remote control device sends IP control signal packets containing the remote control device ID number, the controlled host action control signal, the controlled slave ID number to the network interface module via the Internet, the network interface module decodes and reassembles the IP control signal packets containing the remote control device ID number, the controlled host action control signal, the controlled slave ID number into the digital control signal containing the remote control device ID number, the controlled host action control signal, the controlled slave ID number to the processing module; the processing module compares the ID number of the remote control equipment in the digital control signal with the ID number of the remote control equipment in the memory, and if the same processing module sends the digital control signal containing the action control signal of the controlled host to the first interface module according to the ID number of the controlled host; the first interface module converts a digital control signal containing a controlled host action control signal into an analog control signal containing a controlled host action control signal and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal; the controlled host sends an analog signal to the processing module through the first interface module, the processing module sends a digital signal formed by converting the analog signal sent by the controlled host to the second interface module according to the ID number of the controlled slave device, and the second interface module converts the digital signal into the analog signal and sends the analog signal to the designated slave device.
6. A KVM switcher with remote management function is characterized in that the KVM switcher comprises a first interface module, a processing module, a network interface module and a second interface module, and a plurality of hosts are connected with the first interface module of the KVM switcher; the plurality of remote control devices are connected with a network interface module of the KVM switcher through the Internet, and the KVM switcher is connected with the plurality of slave devices through a second interface module;
the first interface module is a USB-to-serial port module, the processing module is a multi-path serial port buffer output module, the second module is a serial port-to-USB module, and the network interface module is a network interface and switching control module;
the USB-to-serial port module converts USB signals of a multi-path host into TTL serial port signals and sends the TTL serial port signals to the multi-path serial port buffer output module, the multi-path serial port buffer output module selects the multi-path serial port signals input by the USB-to-serial port module according to the input of the network interface and the switching control module, then inputs one path of signals to the serial port-to-USB module, the serial port-to-USB signals convert the serial port signals into USB signals to be output, and the remote control device controls the network interface and the switching control module through the Internet.
7. A KVM switch method with remote management function, the method comprising:
step S100: the plurality of hosts send the analog signals to a first interface module of the KVM switcher; the first interface module converts the analog signals of each host into digital signals and sends the digital signals to the processing module of the KVM switcher; the processing module sends the digital signals of the hosts to a network interface module of the KVM switcher; the network interface module converts the digital signals into IP data packets and sends the IP data packets to a plurality of remote control devices through the Internet;
step S200: the remote control equipment decodes the IP data packet and recombines the IP data packet into a digital signal, and then converts the digital signal into an analog signal to be sent to a screen of the remote control equipment; when the remote control equipment sends a control signal through a keyboard and a mouse of the remote control equipment, the remote control equipment converts the control signal into an IP control signal data packet and sends the IP control signal data packet to the network interface module through the Internet;
step S300: the network interface module decodes the IP control signal data packets, recombines the IP control signal data packets into a digital control signal and sends the digital control signal to the processing module, and the processing module sends the digital control signal to the first interface module; the first interface module converts the digital control signal into an analog control signal and sends the analog control signal to the host computer, and the host computer makes corresponding action after receiving the analog control signal;
the remote control equipment can realize the control of the specified host through the Internet; the method specifically comprises the following steps:
when a certain remote control device needs to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control locking signal and a remote control device ID number to a network interface module of the KVM switch through the Internet, and the network interface module decodes and recombines the IP control signal data packet containing the remote control locking signal and the remote control device ID number into a digital control signal containing the remote control locking signal and the remote control device ID number and sends the digital control signal to a processing module; when the processing module receives the digital control signal, if the digital control signal contains a remote control locking signal, judging whether the processing module sets a locking mark, if the digital control signal does not set the locking mark, the remote control locking signal writes the ID number of the remote control equipment into the memory, and sets the locking mark, so that the KVM switcher is in a control information locking state;
when the KVM switcher is in a state of receiving control information locking, the remote control device locking the KVM switcher sends an IP control signal data packet containing a remote control device ID number, a controlled host ID number and a controlled host action control signal to the network interface module through the Internet, and the network interface module decodes and recombines the IP control signal data packet containing the remote control device ID number, the controlled host ID number and the controlled host action control signal into a digital control signal containing the remote control device ID number, the controlled host ID number and the controlled host action control signal and sends the digital control signal to the processing module; when the processing module receives the digital control signal sent by the network interface module, the processing module compares the ID number of the remote control equipment in the digital control signal with the ID number of the remote control equipment in the memory, and if the same processing module sends the digital control signal containing the action control signal of the controlled host to the first interface module according to the ID number of the controlled host; the first interface module converts a digital control signal containing a controlled host action control signal into an analog control signal containing a controlled host action control signal and sends the analog control signal to the controlled host, and the controlled host makes a corresponding action after receiving the analog control signal;
when a certain remote control device needs to be unlocked to control a specified controlled host, the remote control device sends an IP control signal data packet containing a remote control unlocking signal, a remote control device ID number and a controlled host ID number to a network interface module through the Internet, and the network interface module decodes and recombines the IP control signal data packets containing the remote control unlocking signal, the remote control device ID number and the controlled host ID number into a digital control signal containing the remote unlocking signal, the remote control device ID number and the controlled host ID number and sends the digital control signal to a processing module; when the processing module receives a digital control signal, if the digital control signal contains a remote control unlocking signal, judging whether the processing module sets a locking mark, if the locking mark is set, comparing the ID number of the remote control equipment of the digital control signal with the ID number of the remote control equipment stored in the memory by the processing module, and if the ID numbers of the remote control equipment of the digital control signal and the ID number of the remote control equipment stored in the memory are the same, clearing the locking mark, and enabling the KVM switch to be in a control information receiving unlocking state;
the remote control device can display the information sent by the appointed host through the appointed remote control device through the internet.
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