CN111049631B - Cross-network interaction system and cross-network interaction method - Google Patents
Cross-network interaction system and cross-network interaction method Download PDFInfo
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- CN111049631B CN111049631B CN201910489833.1A CN201910489833A CN111049631B CN 111049631 B CN111049631 B CN 111049631B CN 201910489833 A CN201910489833 A CN 201910489833A CN 111049631 B CN111049631 B CN 111049631B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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Abstract
The invention provides a cross-network interaction system, which is used for interacting signal sources in each subnet, and comprises: the system comprises an interactive computer, a first conversion device, a one-way transmission device and forwarding computers in various subnets; the interactive computer is connected with the first conversion equipment through a network and is used for sending a control command aiming at a signal source to the first conversion equipment; the first conversion device is used for receiving the control command in the form of a network signal, converting the control command in the form of the network signal into a proper form suitable for being transmitted to a forwarding computer in a subnet where the corresponding signal source is located through the unidirectional transmission device, and transmitting the control command in the proper form to the forwarding computer through the unidirectional transmission device; the forwarding computer is used for receiving the control command and controlling the corresponding signal source through the subnet where the corresponding signal source is located according to the control command. The invention can realize real-time and safe calling of the network cameras in a plurality of subnets and safe interaction of the network cameras.
Description
Technical Field
The present invention relates to an interaction apparatus and an interaction method, and more particularly, to a cross-network interaction method and system for interacting signal sources in at least two subnets.
Background
In some monitoring fields, it is often necessary to call some monitoring images across the network, as shown in fig. 1, where three dashed boxes represent three groups of monitoring devices (e.g., webcams) respectively located in the subnet 1, the subnet 2, and the subnet 3 (as shown by dashed boxes in fig. 1), and information between the subnet 1, the subnet 2, and the subnet 3 is strictly prohibited from flowing into each other due to safety concerns, that is, it is necessary to prevent the content of the monitoring device in the subnet 1 from flowing into the monitoring device in the subnet 2, or the monitoring device in the subnet 1 from affecting the operation of the monitoring device in the subnet 2. Therefore, after the monitoring device of the subnet 1 is called through the network 1, in order to call the monitoring device of the subnet 2, the network connection to the subnet 1 needs to be turned off, so as to prevent the two devices from being simultaneously present on the same network, and the stream string or mutual influence occurs between the two devices. This operation mode, which requires frequent network connection and disconnection, seriously reduces the information acquisition rate, affects the interaction efficiency, and increases the personnel operation cost.
Disclosure of Invention
In order to solve the above problems, the present invention provides the following cross-network interaction method and system.
The cross-network interactive system according to the first aspect of the present invention is configured to interact with signal sources in respective subnets, and the system includes:
the system comprises an interactive computer, a first conversion device, a one-way transmission device and forwarding computers in various subnets;
the interactive computer is connected with the first conversion equipment through a network and is used for sending a control command aiming at a signal source to the first conversion equipment;
the first conversion device is used for receiving the control command in the form of a network signal, converting the control command in the form of the network signal into a proper form suitable for being transmitted to a forwarding computer in a subnet where the corresponding signal source is located through the unidirectional transmission device, and transmitting the control command in the proper form to the forwarding computer through the unidirectional transmission device;
the forwarding computer is used for receiving the control command and controlling the corresponding signal source through the subnet where the corresponding signal source is located according to the control command.
The cross-network interactive system according to the second aspect of the present invention is configured to interact with signal sources in respective subnets, and the system includes: the system comprises an interactive computer, a first conversion device, a first one-way transmission device, a forwarding computer in each subnet and a second one-way transmission device;
the interactive computer is connected with the first conversion equipment through a network and is used for sending a control command for calling the content of a signal source to the first conversion equipment;
the first conversion device is used for receiving the control command through the network, converting the control command in the form of network signals into a first appropriate form suitable for being transmitted to the forwarding computer through the first unidirectional transmission device, and transmitting the converted control command in the first appropriate form to the forwarding computer in the subnet where the signal source to which the control command is directed through the first unidirectional transmission device;
the first unidirectional transmission equipment is used for transmitting the converted control command in the first appropriate form to a forwarding computer in a subnet where a signal source to which the control command is directed is located;
the forwarding computer is used for receiving the control command, calling the content of the signal source aimed by the control command according to the control command, and decoding the content from the aimed signal source into a second proper format suitable for being output externally through the second unidirectional transmission equipment.
According to the third aspect of the present invention, a cross-network interaction method implemented based on a cross-network interaction system includes: the system comprises an interactive computer, a first conversion device, a first one-way transmission device, a forwarding computer in each subnet and a second one-way transmission device; the interactive computer is connected with the first conversion equipment through a network; the first conversion equipment is connected with the forwarding computers in the sub-networks through the first one-way transmission equipment; the forwarding computer in each subnet and the signal source in the subnet are connected to the respective subnet; the method comprises the following steps:
the interactive computer sends a control command aiming at a signal source to the first conversion equipment through the network;
the first conversion device receives the control command in the form of a network signal, converts the control command in the form of the network signal into a proper form suitable for being transmitted to a forwarding computer in a subnet where the corresponding signal source is located through the unidirectional transmission device, and transmits the control command in the proper form to the forwarding computer through the unidirectional transmission device;
the forwarding computer is used for receiving the control command and controlling the corresponding signal source through the subnet where the corresponding signal source is located according to the control command.
According to the fourth aspect of the present invention, a cross-network interaction method implemented based on a cross-network interaction system includes: the system comprises an interactive computer, a first conversion device, a first one-way transmission device, a forwarding computer in each subnet and a second one-way transmission device; the interactive computer is connected with the first conversion equipment through a network; the first conversion equipment is connected with the forwarding computers in the sub-networks through the first one-way transmission equipment; the forwarding computer in each subnet and the signal source in the subnet are connected to the respective subnet; the method comprises the following steps:
the interactive computer sends a control command for calling the content of a signal source to the first conversion equipment through the network;
the first conversion device receives the control command in the form of a network signal, converts the control command in the form of the network signal into a proper form suitable for being transmitted to a forwarding computer in a subnet where the corresponding signal source is located through the unidirectional transmission device, and transmits the control command in the proper form to the forwarding computer through the unidirectional transmission device;
and the forwarding computer receives the control command, calls the content of the signal source aimed by the control command according to the control command, and decodes the content from the aimed signal source into a second proper format suitable for being output externally through the second unidirectional transmission equipment.
By the invention, especially by the one-way non-network transmission mechanism measures of a plurality of links adopted in the method, the following steps can be effectively avoided: in the calling process, the content stream of the network camera in one subnet is strung to the network camera in the other subnet, or the operation on the network camera in one subnet can inappropriately influence the network camera in the other subnet, and the problems of image calling lag, low interaction efficiency, high interaction cost and the like caused by network switching for ensuring the interaction safety in the prior art are also avoided. Compared with the prior art, the invention can realize real-time and safe calling of the network cameras in the plurality of subnets and safe interaction of the network cameras.
Drawings
FIG. 1 illustrates a connection between a monitoring device (webcam) and a computer in a plurality of subnets in the prior art;
fig. 2 shows a schematic diagram of an interaction system for interacting with monitoring devices in at least two subnets, according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
In the present application, the essence of the present application, which relates to the implementation through a network, is intended to cover both the wired or wireless network connection implemented through necessary firmware or software such as a switch, a router, etc., and the wired or wireless network connection implemented through some server or other computer, etc., as an intermediary. In the present application, the networks involved may include Wi-fi networks, Bluetooth networks, Private Area Networks (PAN), Local Area Networks (LAN), Wide Area Networks (WAN), IEEE 802.1x, intranets, the Internet, extranets, and combinations thereof. The network may also include a digital cellular telephone network, which may include Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), cdmaOne, CDMA2000, evolution-data optimized (EV-DO), enhanced data rates for GSM evolution (EDGE), Universal Mobile Telecommunications System (UMTS), Digital Enhanced Cordless Telecommunications (DECT), digital AMPS (IS-136/TDMA), Integrated digital enhanced network (iDEN), WiMAX, LTE advanced, Mobile Broadband Wireless Access (MBWA), IEEE 802.20. The network may be public access, private, virtual private, such as a VPN.
In this application, a component is located within a subnet, meaning: the components may be interconnected with other components within the subnet as desired.
In the following embodiments, a network camera is taken as an example of the monitoring device, and besides the monitoring device, a person skilled in the art will understand that the description or the technical solutions are also applicable to other signal sources, for example, various network sensing devices, various network intelligent display and/or control devices, various network computing devices, mobile devices, and the like, or a combination thereof.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The invention will now be described by way of example with reference to the accompanying drawings, in conjunction with which embodiments are shown.
Fig. 2 shows a schematic diagram of a cross-network interaction system for interacting with monitoring devices in at least two subnets according to a first embodiment of the present invention.
The interactive system comprises an interactive computer 2 (hereinafter referred to as a computer, "interactive" to indicate that the computer is used for realizing interaction or manipulation on a target object), a network switching device 3, forwarding computers (4/5/6) in each sub-network, video encoders (/7/8/9) corresponding to each sub-network, and the like. The computer 2 is connected to the web-to-string device 3 via an interactive network or networks ("interactive" to indicate the network in which the computer is located for initiating the interactive operation), for outputting control commands to the web-to-string device; the interactive network may be, for example, a private network shown in the figure, and the private network and the sub-network may be network isolated according to an actual scenario. The network-to-serial device 3 is connected with forwarding computers in the sub-networks through a one-way serial port line; the forwarding computers within each subnet and the webcams (10/11/12; 13/14/15; 16/17/18) within that subnet are both connected to their respective subnets; the forwarding computers within each subnet are connected to respective video encoders (7/8/9) by respective unidirectional video lines; each video encoder is connected to the computer 2 via an interactive network, for example via a private network as shown in the figure to the computer 2.
The operation of the various components of the exemplary cross-network interaction system of the present invention and an exemplary interaction process or method will be described below in conjunction with fig. 2.
The computer 2 may pre-store the network camera ID in each subnet, the IP address of each network camera, the corresponding relationship between the ID of each network camera and the video stream address of the network camera, the subnet where each network camera is located, and the corresponding relationship between the forwarding computer in the subnet where each network camera is located and the port on the network switching string device; the IP addresses of the webcams and the correspondence between the ID of the webcam and the video stream address of the webcam may also be stored in advance in the forwarding computers (as will be mentioned below). In this context, for ease of understanding, in some cases a subnet may be described by a subnet in which the webcam is located, or a subnet in which the decoding platform is located, or a subnet in which the serial-to-device is located, but those skilled in the art will understand from the context that each subnet defined in the foregoing manner sometimes refers to the same subnet.
Now, assuming that the network camera to be controlled by the computer 2 is the network camera 10 in the figure, a user may act on a mark corresponding to the network camera 10 by, for example, clicking, double-clicking, rotating, or the like, to trigger a control command for the network camera 10, for example, to instruct to control on/off, focus adjustment, view angle conversion, or the like of the network camera 10, or to instruct to call up a monitoring picture of the corresponding network camera 10; the control command may further include information such as the ID of the network camera 10, the IP address of the network camera 10, the video stream address of the network camera 10, the subnet where the network camera 10 is located, and the port on the forwarding computer 4 corresponding to the forwarding computer 3 in the subnet where the network camera 10 is located.
After receiving the control command for the network camera 10, the interactive computer 2 sends the control command to the port corresponding to the network switching device 3 through the network according to the control command, that is, to the port corresponding to the forwarding computer 4 in the subnet where the network camera 10 is located. Here, after receiving the control command, the interactive computer may read information such as a port on the forwarding computer 3 corresponding to the forwarding computer 4 in the subnet in which the network camera 10 is located, so as to send the control command to the corresponding forwarding computer 3, and thus, the control command may be sent to the corresponding forwarding computer 4. In the present application, the information contained in the control command may be increased or decreased according to actual needs, for example, before the control command is forwarded from the computer 2 to the network relay device 3, information such as a port signal on the network relay device 3 corresponding to the relay computer 4 in the subnet in which the network camera 10 is located in the control command to be forwarded may be eliminated, because after the control command is transmitted to a port of an appropriate network relay device, the control command is naturally transmitted to the corresponding relay computer 4 after passing through the network relay device. After reading this application, it will be apparent to those skilled in the art that some information may be deleted from the control command as needed and as a transmission link, as appropriate, to avoid that the used information, which is no longer necessary, is passed on to the next step. Since the situations where information in such control commands can be deleted or added with the transmission of the control commands can be determined by those skilled in the art according to the context, various deletions and additions are not illustrated and described herein, but the application is intended to cover such situations when describing the transmission of the control commands, and such situations are all within the contemplation and protection of the present invention.
The network switching serial device 3 is configured to receive the control command in the form of a network signal sent by the computer, convert the control command into a serial signal (i.e., a control command in the form of a serial signal, which will be abbreviated as a serial signal hereinafter for simplicity), and send the serial signal to the corresponding forwarding computer 4 via a unidirectional serial line through a port of the network switching serial device 3 corresponding to the forwarding computer 4 in the subnet where the network camera 10 is located.
The forwarding computer 4 is configured to receive the control command and control the signal source according to the control command through the subnet in which the signal source is located, such as the subnet 1 in fig. 2.
In some other embodiments, if the control command is only to instruct to control the network camera 10 to turn on or off, adjust the focal length, change the viewing angle, and the like, the forwarding computer 4 may also directly send the serial port signal to the corresponding network camera 10 through the unidirectional serial port line to control the network camera 10; alternatively, the forwarding computer 4 may convert the serial port signal into a network signal and send the network signal to the corresponding network camera 10 to control the same.
Turning to the first embodiment, it is still assumed that the control command at this time is only an instruction to control the on/off, focal length adjustment, view angle conversion, and the like of the network camera 10, and the forwarding computer 4 sends the control command or an operation command for the network camera in the control command to the corresponding network camera 10 according to information such as the network camera IP address corresponding to the network camera ID in the control command, so as to control the network camera 10, for example, control the on/off, focal length, view angle, and the like of the network camera 10. In some embodiments, the forwarding computer 4 may also pre-store a corresponding relationship between the network camera ID and the network camera IP address, so that the forwarding computer 4 searches for the IP address corresponding to the camera according to the network camera ID, and controls the corresponding camera according to the IP address; at this time, the corresponding relation between the network camera ID and the information such as the IP address of the network camera does not need to be stored in the interactive computer in advance.
If the control command or the operation command corresponds to retrieving a monitoring picture of the network camera 10, the forwarding computer retrieves the picture of the network camera 10 according to the control command, and converts a network signal corresponding to the picture into a video signal to be output externally, for example, to a display screen through a video cable; here, the interactive computer prestores the video stream address of the network camera corresponding to the network camera ID; in some embodiments, instead of storing information such as the correspondence between the network camera ID and the video stream address of the network camera in the interactive computer, the forwarding computer may store information such as the correspondence between each network camera ID and the video stream address of the network camera in advance, so that the forwarding computer can search for the video stream address corresponding to the camera ID from the camera ID, and call the picture of the corresponding camera accordingly.
The cross-network interactive system may further include a video encoder, the forwarding computer encodes the picture called from the camera into a video signal, transmits the video signal to the video encoder in the subnet through a unidirectional video line, encodes the video signal into a network signal by the video encoder, and transmits the network signal to the interactive computer 2 through a network, such as a private network in the figure, thereby realizing calling of the network camera 10. In some embodiments, the interactive computer 2 may pre-fetch or store the video stream address information of the video encoder 6 in order to fetch the output content from the video encoder, i.e., the content of the camera 10. The unidirectional video line can comprise various video lines which can realize unidirectional transmission, such as HDMI, DVI and the like, and the forwarding computer processes the content according to the type of the unidirectional video line before outputting the content to the video encoder so as to output the content to the video encoder through the video line.
Through the embodiments of the present invention, especially through measures such as a unidirectional non-network transmission mechanism of multiple links adopted therein, it can be effectively avoided that, in the process of fetching, the content of the network camera in a certain subnet can be streamed to the network camera in another subnet, or the operation of the network camera in one subnet can inappropriately affect the network camera in another subnet, and the problems of image fetching lag, low interaction efficiency, high interaction cost and the like caused by switching networks to ensure the interaction security in the prior art are also avoided. Compared with the prior art, the invention can realize real-time and safe calling of the network cameras in the plurality of subnets and safe interaction of the network cameras.
The above description of the components within the first dashed box around fig. 2 also applies to the components associated with the remaining two dashed boxes. For the sake of simplicity, no further description is provided herein.
In the application, instead of the interactive computer, other interactive devices having the above-mentioned functions of the interactive computer may be used.
In the above embodiment, the aforementioned unidirectional serial port line may be replaced by another unidirectional transmission device, for example, an optical fiber with a shutter, and accordingly, the serial-to-network device and the network-to-serial device are replaced by a conversion device for converting an optical fiber signal into a network signal and a conversion device for converting a network signal into an optical fiber signal, for example, an "optical modem".
In the above embodiments, the monitoring device may also be other signal sources, such as various sensing devices, various smart display and/or control devices, various computing devices, mobile devices, and the like, or combinations thereof.
In the above embodiments, there may be only one webcam, or only one signal source, in each "subnet". Therefore, the invention can ensure that no information stream string or mutual influence occurs between the network cameras when the two network cameras which are originally isolated by the network are called or controlled.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (18)
1. A cross-network interaction system for interacting signal sources within each subnet, the system comprising:
the system comprises an interactive computer, a first conversion device, a plurality of one-way transmission devices and forwarding computers in various subnets;
the interactive computer is connected with the first conversion equipment through a network and is used for sending a control command aiming at a signal source to the first conversion equipment;
the first conversion device is used for receiving the control command in the form of a network signal, converting the control command in the form of the network signal into a proper form suitable for being transmitted to a forwarding computer in a subnet where the corresponding signal source is located through the unidirectional transmission device, and transmitting the control command in the proper form to the forwarding computer through the unidirectional transmission device;
the forwarding computer is used for receiving the control command and controlling the corresponding signal source through the subnet where the corresponding signal source is located according to the control command;
the first conversion device comprises a network serial conversion device for converting network signals into serial signals, and the plurality of unidirectional transmission devices comprise a plurality of unidirectional serial lines;
the interactive computer prestores the corresponding relation between the forwarding computer in the subnet where each signal source is positioned and the port on the network forwarding string device;
the control command comprises a port on network string converting equipment corresponding to a forwarding computer in a subnet where the corresponding signal source is located;
each unidirectional serial port line connects a port of the network serial conversion equipment with a forwarding computer in the corresponding subnet.
2. The system of claim 1, wherein the control command further includes an ID of the targeted signal source, a subnet of the targeted signal source, and an IP address corresponding to the targeted signal source.
3. The cross-network interactive system of claim 1, wherein the interactive computer further prestores a corresponding relationship between a signal source ID in each subnet, a subnet where each signal source is located, and each signal source ID and the signal source IP address.
4. The cross-network interactive system of claim 1, wherein the interactive computer further prestores signal source IDs in the subnets and subnets where the signal sources are located; the forwarding computer prestores the correspondence between each signal source ID and the IP address of the signal source.
5. The cross-network interaction system of claim 4, wherein the control command further comprises an ID of the targeted signal source, a subnet of the targeted signal source; the receiving the control command and controlling the corresponding signal source through the subnet where the corresponding signal source is located according to the control command comprises receiving the control command, searching an IP address corresponding to the corresponding signal source according to the control command, and controlling the corresponding signal source through the subnet where the corresponding signal source is located according to the control command and the IP address.
6. The cross-network interactive system of claim 1, the signal source comprising: a network camera; the signal source for controlling comprises the control of the on and off of the network camera, the adjustment of focal length and the transformation of visual angle.
7. A cross-network interaction system for interacting signal sources within each subnet, the system comprising: the system comprises an interactive computer, a first conversion device, a plurality of first unidirectional transmission devices, a forwarding computer in each subnet and a second unidirectional transmission device;
the interactive computer is connected with the first conversion equipment through a network and is used for sending a control command for calling the content of a signal source to the first conversion equipment;
the first conversion device is used for receiving the control command through the network, converting the control command in the form of network signals into a first appropriate form suitable for being transmitted to the forwarding computer through the first unidirectional transmission device, and transmitting the converted control command in the first appropriate form to the forwarding computer in the subnet where the signal source to which the control command is directed through the first unidirectional transmission device;
the first unidirectional transmission equipment is used for transmitting the converted control command in the first appropriate form to a forwarding computer in a subnet where a signal source to which the control command is directed is located;
the forwarding computer is used for receiving the control command, calling the content of the signal source to which the control command is directed according to the control command, and decoding the content from the directed signal source into a second appropriate format suitable for being output externally through a second unidirectional transmission device;
the first conversion device comprises a network serial conversion device for converting network signals into serial signals, and the plurality of unidirectional transmission devices comprise a plurality of unidirectional serial lines;
the interactive computer prestores the corresponding relation between the forwarding computer in the subnet where each signal source is positioned and the port on the network forwarding string device;
the control command comprises a port on network string converting equipment corresponding to a forwarding computer in a subnet where the corresponding signal source is located;
each unidirectional serial port line connects a port of the network serial conversion equipment with a forwarding computer in the corresponding subnet.
8. The cross-network interactive system of claim 7, further comprising a video encoder;
the forwarding computer decodes the content from the targeted signal source into a second appropriate format suitable for being output to a video encoder through second unidirectional transmission equipment, and sends the content of the second appropriate format of the targeted signal source to the video encoder through the second unidirectional transmission equipment;
the video encoder is used for receiving the content in the second proper format from the forwarding computer, encoding the content into a network signal, and sending the network signal to the interactive computer or outputting the network signal to the outside through a network.
9. The system of claim 8, wherein the control command further includes an ID of the targeted signal source, a subnet of the targeted signal source, an IP address corresponding to the targeted signal source, and a video stream address of the targeted signal source.
10. The system of claim 8, wherein the interactive computer further pre-stores the signal source ID in each subnet, the subnet where each signal source is located, the corresponding relationship between each signal source ID and the IP address of the signal source, and the corresponding relationship between each signal source ID and the video stream address of the signal source.
11. The cross-network interactive system of claim 8, wherein the interactive computer further prestores signal source IDs in the subnets and subnets where the signal sources are located; the forwarding computer prestores the corresponding relationship between each signal source ID and the video stream address of the signal source.
12. The cross-network interaction system of claim 11, wherein the control command further includes an ID of the signal source, a subnet of the signal source; the receiving the control command and calling the content of the signal source to which the control command is directed according to the control command includes: and receiving the control command, searching the video stream address of the corresponding signal source according to the control command, and calling the content of the signal source corresponding to the control command through the subnet of the corresponding signal source according to the control command and the video stream address of the corresponding signal source.
13. The cross-network interactive system of claim 8, the second unidirectional transmission device comprising a unidirectional video line.
14. The cross-network interactive system of claim 1 or 7, the signal source comprising: a web cam, a web sensing device, a web smart display and/or control device, a web computing device, a mobile device, or a combination thereof.
15. The cross-network interactive system of claim 1 or 7, the network comprising a private network; the private network and the subnet network are isolated.
16. A cross-network interaction method realized based on a cross-network interaction system comprises the following steps: the system comprises an interactive computer, a first conversion device, a plurality of first one-way transmission devices, a forwarding computer in each subnet and a second one-way transmission device; the interactive computer is connected with the first conversion equipment through a network; the first conversion equipment is connected with the forwarding computers in the sub-networks through the first one-way transmission equipment; the forwarding computer in each subnet and the signal source in the subnet are connected to the respective subnet; the method comprises the following steps:
the interactive computer sends a control command aiming at a signal source to the first conversion equipment through the network;
the first conversion device receives the control command in the form of a network signal, converts the control command in the form of the network signal into a proper form suitable for being transmitted to a forwarding computer in a subnet where the corresponding signal source is located through the unidirectional transmission device, and transmits the control command in the proper form to the forwarding computer through the unidirectional transmission device;
the forwarding computer is used for receiving the control command and controlling the corresponding signal source through the subnet where the corresponding signal source is located according to the control command;
the first conversion device comprises a network serial conversion device for converting network signals into serial signals, and the plurality of unidirectional transmission devices comprise a plurality of unidirectional serial lines;
the interactive computer prestores the corresponding relation between the forwarding computer in the subnet where each signal source is positioned and the port on the network forwarding string device;
the control command comprises a port on network string converting equipment corresponding to a forwarding computer in a subnet where the corresponding signal source is located;
each unidirectional serial port line connects a port of the network serial conversion equipment with a forwarding computer in the corresponding subnet.
17. A cross-network interaction method realized based on a cross-network interaction system comprises the following steps: the system comprises an interactive computer, a first conversion device, a plurality of first one-way transmission devices, a forwarding computer in each subnet and a second one-way transmission device; the interactive computer is connected with the first conversion equipment through a network; the first conversion equipment is connected with the forwarding computers in the sub-networks through the first one-way transmission equipment; the forwarding computer in each subnet and the signal source in the subnet are connected to the respective subnet; the method comprises the following steps:
the interactive computer sends a control command for calling the content of a signal source to the first conversion equipment through the network;
the first conversion device receives the control command in the form of a network signal, converts the control command in the form of the network signal into a proper form suitable for being transmitted to a forwarding computer in a subnet where the corresponding signal source is located through the unidirectional transmission device, and transmits the control command in the proper form to the forwarding computer through the unidirectional transmission device;
the forwarding computer receives the control command, calls the content of the signal source to which the control command aims according to the control command, and decodes the content of the signal source to which the control command aims into a second appropriate format suitable for being output externally through second unidirectional transmission equipment;
the first conversion device comprises a network serial conversion device for converting network signals into serial signals, and the plurality of unidirectional transmission devices comprise a plurality of unidirectional serial lines;
the interactive computer prestores the corresponding relation between the forwarding computer in the subnet where each signal source is positioned and the port on the network forwarding string device;
the control command comprises a port on network string converting equipment corresponding to a forwarding computer in a subnet where the corresponding signal source is located;
each unidirectional serial port line connects a port of the network serial conversion equipment with a forwarding computer in the corresponding subnet.
18. The cross-network interaction method of claim 17, the system further comprising a video encoder, the method comprising;
the forwarding computer decodes the content from the targeted signal source into a second appropriate format suitable for being output to a video encoder through second unidirectional transmission equipment, and sends the content of the second appropriate format of the targeted signal source to the video encoder through the second unidirectional transmission equipment;
the video encoder is used for receiving the content in the second proper format from the forwarding computer, encoding the content into a network signal, and sending the network signal to the interactive computer or outputting the network signal to the outside through a network.
Priority Applications (1)
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