A high-fault-tolerant no-feedback-link image transmission method and system based on multi-channel redundancy

Abstract

The present invention proposes a high-fault-tolerant feedback-free link image transmission method and system based on multi-channel redundancy. The sending end receives TCP and UDP data streams, strips the protocol headers, and encodes the data into images; divides the terminal visual window for display into multiple regions for displaying images; reorganizes and synthesizes the image data according to the fault-tolerant methods R0, R1, and R10, and pushes the reorganized and synthesized images to the display terminal for display; the receiving end uses multiple image acquisition modules to capture all the images of the sending end; analyzes all the image data, and re-fuses to remove the redundant parts; repackages the data into TCP and UDP data streams and forwards them to the target device to achieve high-fault-tolerant transmission with multi-channel redundancy in a feedback-free link under physical isolation; solves the problem that during the image transmission process, due to the failure of one or several acquisition modules or long-term operation, the parsed data is unstable, resulting in the inability to normally parse the images and data loss.

Description

Technical Field

[0001] The present invention belongs to the field of information security isolation and transmission, and specifically relates to a high-fault-tolerant non-feedback link image transmission method and system based on multi-channel redundancy, which is applicable to high-reliability unidirectional data transmission without a feedback link between two isolated networks. Background Art

[0002] In industries with confidentiality requirements, such as the Party, government, and military protecting national secrets, and enterprises and institutions protecting business secrets or customer privacy, a common security measure is to physically isolate the classified network and the public network (such as the Internet). There are relevant management regulations in the Party, government, and military sectors, requiring physical isolation between the internal network and the Internet. The hierarchical protection promoted by the Ministry of Public Security also has clear requirements for physical isolation. The definition of physical isolation means that there cannot be any physical device connecting the two networks.

[0003] Recently, technologies such as big data, cloud computing, and artificial intelligence have developed vigorously. The isolation of the underlying network infrastructure has made the aggregation of multi-network data a bottleneck for the application of these technologies. How to comply with regulations and automatically complete data transmission between isolated networks has become the key to the implementation of technologies such as big data. Currently, information security certification departments such as the public security and military sectors recognize devices such as optical disc ferry machines and two-dimensional code ferry machines and issue sales licenses for physical isolation transmission devices.

[0004] Currently, the existing two-dimensional code ferry machines on the market are limited by the effective data that can be carried by a single two-dimensional code. To increase the transmission bandwidth, only the number of two-dimensional codes changing per second can be increased, but this also brings many problems. For example, the captured two-dimensional code images are torn, blurred, incomplete, etc., resulting in the two-dimensional code images being unable to be parsed at all. The stability of the device will also decrease due to environmental impacts such as temperature and humidity during long-term operation. Any failure at the sending or receiving end will cause the transmission channel to collapse. These problems will cause the single-channel two-dimensional code ferry device to fail to meet the requirements in many high-reliability transmission scenarios. Summary of the Invention

[0005] Aiming at the requirement of unidirectional data transmission between physically isolated networks and the need to improve the reliability of unidirectional data transmission while maintaining the transmission rate, the present invention proposes a high-fault-tolerant non-feedback link image transmission method based on multi-channel redundancy, which solves the problem that the image cannot be normally parsed and data is lost due to the failure of one or several acquisition devices or unstable parsed data caused by long-term operation during the image transmission process, and ensures high-reliability data transmission in a unidirectional non-feedback physically isolated environment.

[0006] On the one hand, the sending end divides the visible window of the terminal for display into multiple areas for displaying images; re-organizes and synthesizes the image data according to the error tolerance methods R0, R1, and R10, and pushes the re-organized and synthesized images to the display terminal for display. Among them, the R0 method means no error tolerance, and different image data are displayed in all display areas; the R1 method means that there is a display area with the attribute of backup for all the image data with the main attribute in all display areas to display the same image data; the R10 is compatible with the characteristics of R0 and R1, and the number of main display areas that need error tolerance can be set, and image data redundancy is performed according to the configured number. Among them, the R0 has the fastest data transmission speed and an error tolerance rate of 0%; the R1 has the slowest data transmission speed, performs 100% error tolerance on the data, and is the safest; the R10 can set the error tolerance rate according to needs, and can be set between 0% and 100%.

[0007] On the other hand, at the receiving end, multiple image acquisition modules are used to capture all the images at the sending end, parse all the image data, and preferentially parse the image data in the main display area. After the parsing fails, it is judged whether there is a backup display area. If there is a backup display area, the image data in the backup display area is parsed, and the data in the backup display area is used after the parsing is successful. If the parsing of the image data in the main display area is successful, it is also judged whether there is a backup display area. If there is a backup display area, the image data in the backup display area is parsed. After the parsing is successful, it is compared whether the main and backup image data are consistent. If they are consistent, the data in the backup display area is discarded, and the data in multiple main display areas are merged into the data to be forwarded after merging.

[0008] The above technical solution has the following beneficial effects: The error tolerance method can be flexibly configured according to different application scenarios, ensuring high reliability of the system. This unidirectional transmission system without feedback between physically isolated networks can automatically complete data transmission from a low-density network to a high-density network while ensuring compliance with security protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 It is the flowchart of the method of the present invention;

[0011] Figure 2 It is the structural block diagram of the system embodiment of the present invention;

[0012] Figure 3 It is the error tolerance configuration schematic diagram of the system embodiment of the present invention;

[0013] Figure 4Schematic diagram of data fusion process of a system embodiment of the present invention. DETAILED DESCRIPTION

[0014] The present invention is described below in conjunction with specific embodiments:

[0015] In this embodiment, four display areas and four image acquisition modules are used, and the R1 fault-tolerant mode is adopted for data transmission.

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, it is a flowchart of a method and system for highly fault-tolerant non-feedback link image transmission based on multi-channel redundancy according to an embodiment of the present invention. The redundant image strategy of the method solves the problem that the image data cannot be stably parsed when a single-channel device fails in data transmission of a unidirectional non-feedback link, thereby improving the reliability of the transmission link. The method includes:

[0018] 101 The sender receives the TCP and UDP data streams, strips off the protocol header and encodes the data content into an image;

[0019] 102 reorganizes and synthesizes the image according to the error tolerance algorithms R0, R1, and R10, and pushes the synthesized image to the display terminal for display;

[0020] 103 The receiving end uses multiple acquisition modules to capture all images;

[0021] 104 parse all image data, re-integrate and remove redundant parts;

[0022] 105 repacks the data into TCP and UDP data streams and forwards them to the target device to achieve high fault-tolerant transmission with multi-channel redundancy without feedback links under physical isolation;

[0023] like Figure 2 FIG. 1 is a block diagram of a high fault-tolerant feedback-free link image transmission method and system structure based on multi-channel redundancy according to another embodiment of the present invention. The system includes:

[0024] There is no physical connection between the sender and the receiver, which results in physical isolation.

[0025] 21. A model configuration module, in the sending end, divides the terminal visual window used for display into a plurality of areas for displaying images;

[0026] 22 data redundancy module, in the transmitting end, rearranges the image data according to the configured display model and sends it to the display module for display;

[0027] 23 display module, in the transmitting end, displays the arranged image data;

[0028] The receiving end does not have any information channel to feed back information to the sending end;

[0029] 24 An image acquisition module, at the receiving end, acquires the image displayed by the display module at the sending end;

[0030] 25. Data fusion module, at the receiving end, analyzes all collected image data and removes redundant information, merges the successfully analyzed data and forwards them;

[0031] 26 Data stream forwarding module, at the receiving end, regenerates the TCP and UDP protocols in the order of the successfully parsed data according to the encoding order of the data stream encoding module at the sending end and the protocol type for forwarding;

[0032] like Figure 3 FIG. 1 is a schematic diagram of a high fault-tolerant non-feedback link image transmission method and system fault-tolerant configuration based on multi-channel redundancy according to another embodiment of the present invention, wherein the steps are as follows:

[0033] 31. Divide the display area into four display areas;

[0034] 32 display areas: the upper two attributes are the main display areas, and the lower two attributes are the backup display areas;

[0035] 33 takes out 2 image data and puts them into the main display area;

[0036] 34 Copy the data in the main display area where the data was previously placed and place them in the standby display area;

[0037] 35 Push the image compiled according to the display model to the display terminal for display;

[0038] like Figure 4 As shown, it is a flowchart of a high fault-tolerant feedback-free link image transmission method and system data fusion based on multi-channel redundancy according to another embodiment of the present invention, and the steps are as follows:

[0039] 41 Analyze the image data of the main display area;

[0040] 42 If the parsing fails, try to parse the image data of the standby display area;

[0041] 43 The image data of the backup display area is parsed successfully and the backup display area data is used. If the backup display area also fails to be parsed, a packet loss problem occurs;

[0042] The image data of the 44 main display areas is successfully parsed. Attempt to parse the image data of the secondary display areas;

[0043] 45 If the image of the secondary display area is successfully parsed, compare whether the main and secondary image data is consistent;

[0044] 46 If they are consistent, discard the data of the secondary display area and use the data of the main display area;

[0045] 47 If they are inconsistent or the image of the secondary display area fails to be parsed, use the data with the same MD5 of the parsed data;

[0046] 48 Merge the two main display area data into the data to be forwarded and send it by the forwarding module.

Claims

1. A high-fault-tolerant feedback-free link image transmission method based on multi-channel redundancy, characterized in that The method is applied to perform high-fault-tolerant unidirectional data transmission without a feedback link between physically isolated networks. The method includes: The sending end divides the visible window of the terminal for display into multiple regions for displaying images; the image data is reorganized and synthesized according to the fault-tolerant modes R0, R1, and R10, and the reorganized and synthesized images are pushed to the display terminal for display; the receiving end uses multiple image acquisition modules to capture all the images of the sending end; analyzes all the image data, and re-fuses to remove redundant data; repackages the data into TCP and UDP data streams and forwards it to the target device to complete the unidirectional non-feedback link data transmission; The image data is reorganized and synthesized according to the fault-tolerant modes R0, R1, and R10. Among them, the R0 mode means no fault tolerance, and different image data is displayed in all display regions; the R1 mode means that there is a backup display region with the same image data as the main image data in all display regions with the main attribute; the R10 mode is compatible with the characteristics of R0 and R1, sets the number of main display regions that need to be fault-tolerant, and performs image data redundancy according to the configured number; among them, the R0 mode has the fastest data transmission speed and a fault tolerance rate of 0%; the R1 mode has the slowest data transmission speed and is 100% fault-tolerant and reliable for data; the R10 mode sets the fault tolerance rate as needed, and the setting range is between 0% and 100%; The steps for analyzing all the image data, re-fusing and removing redundant data are as follows: Step 1: Analyze the image data of the main display region; Step 2: If the analysis fails, try to analyze the image data of the backup display region; Step 3: If the image data of the backup display region is successfully analyzed, use the data of the backup display region. If the backup display region also fails to be analyzed, then analyze the next image data; Step 4: If the image data of the main display region is successfully analyzed, try to analyze the image data of the backup display region; Step 5: If the image of the backup display region is successfully analyzed, compare whether the main and backup image data is consistent; Step 6: If they are consistent, discard the data of the backup display region; use the data of the main display region; Step 7: If they are inconsistent or the image of the backup display region fails to be analyzed, use the data with the same MD5 of the analyzed data; Step 8: Merge the data of the two main display regions and then merge them into the data to be forwarded, which is sent by the forwarding module.

2. The method for transmitting images without feedback link with high fault tolerance based on multi-channel redundancy according to claim 1, wherein The steps for dividing the visible window of the terminal for display into multiple regions for displaying images are as follows: Step 1: Obtain the coordinates of the display terminal window and the coordinates required for displaying a single image to be displayed; Step 2: Divide the display terminal into multiple display regions according to the coordinates required for image display and number them in sequence; Step 3: Set the attributes of each display region for displaying images, either the main display region or the backup display region; Step 4: Generate a model for display according to the configuration.

3. A high-fault-tolerant non-feedback link image transmission method based on multi-channel redundancy according to claim 2, characterized in that, The model for generating an image for display according to the configuration includes the display region number, the attribute of each display region, the relative coordinates of each display region corresponding to the display terminal, the vertical spacing between display regions, and the horizontal spacing between display regions.

4. A high-fault-tolerant no-feedback-link image transmission method based on multi-channel redundancy according to claim 1, characterized in that, The specific steps of the fault-tolerant mode R0 are as follows: Step 1: Parse out the total number n of all display regions for display according to the model for generating an image for display; Step 2: Generate n images and place them in sequence on the display terminal identified by the display model for display.

5. A high-fault-tolerant feedback-free link image transmission method based on multi-channel redundancy according to claim 1, characterized in that, The specific steps of the fault-tolerant mode R1 are as follows: Step 1: Analyze the number of display areas n based on all display area attributes according to the model generated for displaying images, where n>0; Step 2: Generate n images and place them in order in the display area based on the display area attribute; Step 3: Analyze the number m of all display regions with the display region attribute of standby according to the model generated for displaying the image, where m=n; Step 4: Copy the data in the main display area where the data was previously placed and place them in the standby display area; Step 5: Push the image compiled according to the display model to the display terminal for display.

6. A high-fault-tolerant feedback-free link image transmission method based on multi-channel redundancy according to claim 1, characterized in that The specific steps of the fault-tolerant mode R10 are as follows: Step 1: Analyze the number of display areas n based on all display area attributes according to the model generated for displaying images, where n>0; Step 2: Generate n images and place them in order in the display area based on the display area attribute; Step 3: According to the model generated for displaying images, the number m of all display regions with the display region attribute of being prepared is parsed, where m≤n; Step 4: randomly copy the data in the main display area where the data was previously placed and place it in the standby display area; Step 5: Push the image compiled according to the display model to the display terminal for display.

7. A high-fault-tolerant no-feedback link image transmission system based on multi-channel redundancy, characterized in that, The system comprises: There is no physical connection between the sender and the receiver, which is physically isolated. The sender forms multiple display areas. The receiving end uses multiple image acquisition modules to collect image data corresponding to the sending end; A model configuration module, in the sending end, divides the terminal visual window used for display into a plurality of areas for displaying images; The data redundancy module, in the transmitting end, rearranges the image data according to the configured display model and sends it to the display module for display; A display module, in the transmitting end, displays the arranged image data; The receiving end does not have any information channel to feed back information to the sending end; An image acquisition module, at the receiving end, acquires the image displayed by the display module at the sending end; The data fusion module, at the receiving end, parses all collected image data and removes redundant information, merges the successfully parsed data and forwards them; The image data is reorganized and synthesized according to fault tolerance modes R0, R1, and R10, wherein the R0 mode indicates fault tolerance, and all display areas display different image data; the R1 mode indicates that all display areas with main image data have a display area with backup attributes to display the same image data; R10 is compatible with the R0 and R1 characteristics, sets the number of main display areas that need fault tolerance, and performs image data redundancy according to the number of configurations; wherein R0 has the fastest data transmission speed and a fault tolerance rate of 0%; R1 has the slowest data transmission speed, and 100% fault tolerance is safe and reliable for data; R10 sets the fault tolerance rate according to needs, and is set between 0% and 100%; The data fusion module analyzes all image data at the receiving end and re-integrates to remove redundant data. The specific steps are as follows: Step 1: Analyze the image data of the main display area; Step 2: If the parsing fails, attempt to parse the image data of the backup display area; Step 3: If the parsing of the image data of the backup display area is successful, use the data of the backup display area. If the parsing of the backup display area also fails, then parse the next image data; Step 4: If the parsing of the image data of the main display area is successful, attempt to parse the image data of the backup display area; Step 5: After the parsing of the image data of the backup display area is successful, compare whether the main and backup image data are consistent; Step 6: If they are consistent, discard the data of the backup display area and use the data of the main display area; Step 7: If they are inconsistent or the parsing of the backup display area picture fails, use the data with the same MD5 of the parsed data; Step 8: Merge the data of the two main display areas and then merge them into the data to be forwarded, which is sent by the forwarding module; The data stream forwarding module, at the receiving end, regenerates the TCP and UDP protocols in sequence according to the order encoded by the data stream encoding module at the sending end and the protocol type for the successfully parsed data for forwarding.

8. A high-fault-tolerant no-feedback-link image transmission system based on multi-channel redundancy according to claim 7, characterized in that The model configuration module divides and configures the attributes of the display area by using one of the high-fault-tolerant non-feedback link image transmission methods based on multi-channel redundancy in claims 2 and 3.

9. A high-fault-tolerant no-feedback-link image transmission system based on multi-channel redundancy according to claim 7, characterized in that The data redundancy module rearranges the image data by using one of the high-fault-tolerant non-feedback link image transmission methods based on multi-channel redundancy in claims 4, 5, and 6.

10. A high-fault-tolerant non-feedback link image transmission system based on multi-channel redundancy according to claim 7, characterized in that, The data fusion module performs multi-channel data fusion by using one of the high-fault-tolerant non-feedback link image transmission methods based on multi-channel redundancy in claim 1.

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