CN115208889A - High-concurrency high-flow video safety isolation transmission method and system - Google Patents
High-concurrency high-flow video safety isolation transmission method and system Download PDFInfo
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0227—Filtering policies
- H04L63/0245—Filtering by information in the payload
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/101—Server selection for load balancing based on network conditions
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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Abstract
The invention discloses a high-concurrency high-flow video security isolation transmission method and a system, in the system, an external network sends a video on demand request signaling to an internal network through a video signaling detection module, a video load security isolation transmission private network module and a video load security isolation transmission public network module in sequence, and the internal network sends video data to the external network through the video load security isolation transmission public network module and the video load security isolation transmission private network module in sequence; the video load security isolation transmission private network module is in communication connection with the load detection module, the load detection module is in communication connection with the load statistical analysis module, the load statistical analysis module is in communication connection with the load forwarding control module, and the load forwarding control module is in communication connection with the video signaling detection module. The invention can effectively avoid the congestion of the video request and the video data transmission by carrying out the distribution management on the video request, thereby avoiding the congestion of a transmission channel and ensuring the reliable transmission of the video data.
Description
Technical Field
The invention relates to the technical field of video transmission safety. In particular to a high-concurrency large-flow video safety isolation transmission method and a system.
Background
With the popularization of video monitoring services, a large amount of video data is distributed in each corner of a city, and the demand for centralized monitoring of the video data arises. How to guarantee network security is a challenge for video data centralized monitoring, especially in some private networks, the requirement on network security is especially strict, and at this time, the common network security transmission equipment cannot meet the requirement on network security. Meanwhile, as the video has the characteristics of large bandwidth and high concurrency, how to ensure reliable data transmission is another challenge facing video data centralized monitoring.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide a high-concurrency large-flow video security isolation transmission method and system, which can effectively avoid the congestion of video requests and video data transmission by performing distribution management on video requests, thereby avoiding the congestion of a transmission channel and ensuring the reliable transmission of video data.
In order to solve the technical problems, the invention provides the following technical scheme:
a high concurrent large-flow video safety isolation transmission method is characterized in that an internal network sends a video on demand request signaling to an external network through a video signaling monitoring module and safety isolation equipment, the video on demand request signaling received by the external network sends corresponding video data to the internal network through the safety isolation equipment, and the following steps are executed in the process:
step 1, after receiving a video on demand request signaling, a video signaling detection module deeply analyzes a video on demand request message, acquires 2-7-layer network protocol information, and acquires a source MAC address, a source IP address, a source port number, a destination IP address and a destination port number in the network protocol information, wherein the video signaling detection module firstly judges whether the video on demand request is legal or not, blocks the video on demand request which does not meet the requirement, and prevents illegal access;
step 2, the video signaling detection module forwards a legal video-on-demand request to a load forwarding control module;
step 3, a load detection module monitors and collects the load information of a video load security isolation transmission private network module in the security isolation equipment, and then sends the collected load information to a load statistical analysis module;
step 4, after receiving the load information collected by the load detection module, the load statistical analysis module performs calculation analysis on the load information to obtain an analysis result of the residual load processing capacity of the video load security isolation transmission private network module and sends the analysis result to the load forwarding control module;
step 5, the load forwarding control module manages and distributes video requests according to the analysis result and the received video on demand information, and diverts a video stream transmission path to the video load security isolation transmission private network module with the maximum residual load processing capacity;
and 6, the load security isolation transmission private network module realizes unidirectional isolation transmission of video streams, the video load security isolation transmission public network module acquires video data from a video source, an internal security transmission channel is adopted to send the data to the load security isolation transmission private network module, and the load security isolation transmission private network module sends the video data to a video monitoring center.
Further, in the step 1, the video signaling detection module deeply analyzes the vod request message, determines whether the message is legal, and blocks the vod request when there is an illegal vod request.
Further, in step 2, the video signaling detection module forwards a legal video-on-demand request to the load forwarding control module.
Further, in the step 3, the video load security isolation transmission private network module reports load information to the load detection module at regular time, where the load information includes x% of the CPU utilization rate, y% of the network port bandwidth utilization rate, and a concurrent connection number a.
Further, if a certain video load security isolation transmission private network module does not report load information in the reporting period, the load detection module sets the CPU utilization rate of the video load security isolation transmission private network module which does not report load information to x% =100%.
Further, in the step 4, the load statistic analysis module calculates the remaining load processing capacity C of each video load security isolation private network transmission module according to the following algorithm n ：
C n ＝[(1-x％)*F n ]*[(1-y％)*W n ]/a
Wherein, F n The master frequency of a CPU of equipment where a video load security isolation transmission private network module is located;
W n the maximum transmission bandwidth of the network card of the equipment where the video load security isolation transmission private network module is located;
x%: the CPU utilization rate of the video load security isolation transmission private network module;
y%: the network port bandwidth utilization rate of the video load security isolation transmission private network module;
a: and the video load safely isolates the number of concurrent connections of the private network transmission module.
Further, when a plurality of the safety isolation devices are arranged between the intranet and the extranet, in the step 5, the load forwarding control module allocates the video request to the C with the maximum residual load processing capacity according to the analysis result and the received video-on-demand information n And the video load of the value is safely isolated on the transmission private network module.
Further, in the step 5, the load forwarding control module analyzes the analysis result obtained by the load statistics analysis module according to C n Managing and distributing video on demand requests in sequence from large to small, distributing the video stream to C n And the maximum video load is safely isolated on the transmission private network module.
Further, in the step 5, the load forwarding control module obtains C n And the video load with the maximum value safely isolates the IP address and the port number of the video service flow processing port of the private network transmission module, and sends a response message to the video monitoring center by taking the IP address and the port number as the destination IP address and the port number of the video flow.
Further, in the step 6, the video load is sent to the video monitoring center through a one-way isolated internal secure transmission channel.
Furthermore, when the video-on-demand request signaling received by the external network sends corresponding video data to the external network through the security isolation device, a traffic filtering module is configured on a video security isolation transmission public network module in the security isolation device, and the traffic filtering module is used for preventing abnormal video traffic from passing through the video security isolation transmission public network module.
The invention also provides a system for transmitting videos by using the high-concurrency large-flow video safety isolation transmission method, which comprises the following steps:
the video signaling detection module is used for analyzing and forwarding a video on demand request signaling sent by an external network;
the safety isolation equipment is used for carrying out safety isolation on the outer net and the inner net; a video load safety isolation transmission private network module and a video load safety isolation transmission public network module are arranged in the safety isolation device;
the load detection module is used for monitoring and collecting the load information of the video load security isolation transmission private network module in the security isolation equipment and then sending the collected load information to the load statistical analysis module;
the load statistical analysis module is used for calculating and analyzing the load information after receiving the load information collected by the load detection module to obtain an analysis result of the residual load processing capacity of the video load security isolation transmission private network module and sending the analysis result to the load forwarding control module;
the load forwarding control module is used for managing and distributing the video request according to the analysis result and the received video-on-demand information;
the outer network sends a video on demand request signaling to the inner network sequentially through the video signaling detection module, the video load security isolation transmission private network module and the video load security isolation transmission public network module, and the inner network sends video data to the outer network sequentially through the video load security isolation transmission public network module and the video load security isolation transmission private network module; the video load security isolation transmission private network module is in communication connection with the load detection module, the load detection module is in communication connection with the load statistical analysis module, the load statistical analysis module is in communication connection with the load forwarding control module, and the load forwarding control module is in communication connection with the video signaling detection module.
Further, a traffic filtering module is configured on the video load security isolation transmission public network module, and the traffic filtering module is used for preventing abnormal video traffic from passing through the video security isolation transmission public network module.
The technical scheme of the invention achieves the following beneficial technical effects:
1. the invention performs cluster deployment on different isolated transmission devices, and solves the problem of high-flow and high-concurrency video flow transmission.
2. In the invention, the video on demand request message is deeply analyzed, the legality of the video on demand request is judged, and the system data safety problem caused by an illegal video on demand request is avoided.
3. In the invention, the factors such as the CPU utilization rate, the CPU main frequency, the bandwidth utilization rate, the maximum bandwidth and the like of different isolated transmission devices in the cluster are simultaneously considered, and the residual processing capacities of the different isolated transmission devices in the cluster are accurately calculated, so that the transmission capacity of the system is maximized, the transmission reliability can be ensured, the maximum utilization of the capacity of each device can be ensured, and the utilization efficiency of the system is improved.
4. According to the invention, through the load data reported by different isolated transmission devices in the cluster at regular time, if a certain device does not report the load data in a certain period, the CPU utilization rate is considered to be 100%, so that the residual load is zero, the isolated transmission devices in a non-working state can be ensured not to process video flow, and the reliable transmission of the data is ensured to the greatest extent.
5. In the invention, the video data is transmitted through the video load security isolation transmission public network module and the video load security isolation transmission private network module, and a special isolation card is adopted between the video data and the video load security isolation transmission public network module for data transmission, thereby realizing the physical isolation of data transmission and ensuring the network security of the private network.
6. In the invention, when video data is transmitted through the video load security isolation transmission public network module, a flow filtering strategy is configured on the module, so that illegal flow can be filtered out, and the network is ensured not to be attacked by abnormal flow.
Drawings
Fig. 1 is a schematic diagram of the system operation of the present invention for video transmission by using a high concurrent and large-flow video security isolation transmission method.
Detailed Description
As shown in fig. 1, the system for video transmission by using a high-concurrency high-flow video security isolation transmission method includes a video signaling detection module, a security isolation device, a load detection module, a load statistical analysis module, and a load forwarding control module;
the video signaling detection module is used for analyzing and forwarding a video on demand request signaling sent by an external network; the safety isolation equipment is used for carrying out safety isolation on the outer net and the inner net; a video load security isolation transmission private network module and a video load security isolation transmission public network module are arranged in the security isolation device; the load detection module is used for collecting the load information of the video load security isolation transmission private network module in the security isolation equipment and then sending the collected load information to the load statistical analysis module; the load statistical analysis module is used for calculating and analyzing the load information after receiving the load information collected by the load detection module to obtain an analysis result of the residual load processing capacity of the video load security isolation transmission private network module and sending the analysis result to the load forwarding control module; and the load forwarding control module is used for managing and distributing the video request according to the analysis result and the received video-on-demand information.
The outer network sends a video on demand request signaling to the inner network sequentially through the video signaling detection module, the video load security isolation transmission private network module and the video load security isolation transmission public network module, and the inner network sends video data to the outer network sequentially through the video load security isolation transmission public network module and the video load security isolation transmission private network module; the video load security isolation transmission private network module is in communication connection with the load detection module, the load detection module is in communication connection with the load statistical analysis module, the load statistical analysis module is in communication connection with the load forwarding control module, and the load forwarding control module is in communication connection with the video signaling detection module.
In this embodiment, a flow filtering module is configured on the video load security isolation transmission public network module, and the flow filtering module is configured to prevent abnormal video flow from passing through the video security isolation transmission public network module, so that the number of security isolation devices for sending video data to the external network by a plurality of video devices in the internal network is the same as that of the video devices, or a video load security isolation transmission private network module and a video load security isolation transmission public network module, which are the same as that of the video devices, are provided in a single security device.
In the process that the intranet sends a video on demand request to the extranet and the extranet sends corresponding video data to the intranet, the following steps are executed:
1) The intranet sends a video on demand request signaling to a video signaling detection module;
2) After receiving the video-on-demand request signaling, the video signaling detection module analyzes the video-on-demand request signaling to obtain video-on-demand information and sends the corresponding information to the load forwarding control module, and meanwhile, sends the video-on-demand request signaling to a video load security isolation transmission private network module in security isolation equipment;
after receiving a video-on-demand request signaling, a video signaling detection module deeply analyzes the video-on-demand request message, acquires 2-7-layer network protocol information, and acquires a source MAC address, a source IP address, a source port number, a destination IP address and a destination port number in the network protocol information, wherein the video signaling detection module firstly judges whether the video-on-demand request is legal or not, blocks the video-on-demand request which does not meet the requirement, and prevents illegal access;
the video signaling detection module forwards a legal video-on-demand request to the load forwarding control module;
3) A video load security isolation transmission private network module in the security isolation device sends the received video on demand request signaling to a video load security isolation transmission public network module in the same security isolation device;
4) A video load security isolation transmission public network module in the security isolation equipment sends the received video on demand request signaling to an external network;
5) After receiving the video-on-demand request signaling, the outer network sends the video-on-demand request signaling to the safety isolation equipment and sends the video-on-demand request signaling to the inner network through the video load safety isolation transmission public network module and the video load safety isolation transmission private network module;
6) The load detection module monitors and collects the load information of a video load security isolation transmission private network module in the security isolation device, and then sends the collected load information to the load statistical analysis module;
7) The load statistical analysis module is used for calculating and analyzing the load information after receiving the load information collected by the load detection module to obtain an analysis result of the residual load processing capacity of the video load security isolation transmission private network module and sending the analysis result to the load forwarding control module;
8) The load forwarding control module manages and distributes the video request according to the analysis result and the received video-on-demand information, and diverts a video stream transmission path to the video load security isolation transmission private network module with the maximum residual load processing capacity;
9) The load security isolation transmission private network module realizes unidirectional isolation transmission of video streams, the video load security isolation transmission public network module acquires video data from a video source, an internal security transmission channel is adopted to send the data to the load security isolation transmission private network module, and the load security isolation transmission private network module sends the video data to a video monitoring center.
When a plurality of safety isolation devices are arranged between the internal network and the external network, in step 8), the load forwarding control module distributes the video request to the C with the maximum residual load processing capacity according to the analysis result and the received video-on-demand information n And the video load of the value is safely isolated on the transmission private network module.
In step 6), the video load security isolation transmission private network module reports load information to the load detection module at regular time, wherein the load information comprises the utilization rate x% of the CPU, the utilization rate y% of the network port bandwidth and the number a of concurrent connections. If a certain video load security isolation transmission private network module does not report load information in a reporting period, the load detection module sets the CPU utilization rate of the video load security isolation transmission private network module to be x% =100%.
In step 7), the load statistical analysis module calculates the residual load processing capacity C of each video load security isolation transmission private network module according to the following algorithm n ：
C n ＝[(1-x％)*F n ]*[(1-y％)*W n ]/a
Wherein, F n The main frequency of a CPU of equipment where a video load security isolation transmission private network module is located;
W n the maximum transmission bandwidth of the network card of the equipment where the video load security isolation transmission private network module is located;
x%: the CPU utilization rate of the video load security isolation transmission private network module;
y%: the network port bandwidth utilization rate of the video load security isolation transmission private network module;
a: and the video load safely isolates the number of concurrent connections of the private network transmission module.
In step 8), the load forwarding control module analyzes the result obtained by the load statistical analysis module according to C n The video on-demand requests are managed and distributed in the order of magnitude from large to small.
Residual load handling capacity C of a transport private network module by securely isolating individual video loads n Is calculated, and C n The proper video load security isolation transmission private network module is selected in the order of magnitude, so that the situation that congestion occurs at a certain video load security isolation transmission private network module in the video data transmission process is avoided, and meanwhile, the video on demand information in the video on demand request signaling and the residual load processing capacity C of each video load security isolation transmission private network module are used n The method selects a proper video load security isolation transmission private network module, can realize the optimization of the distribution of the video load security isolation transmission private network module, can maximize the utilization rate of the transmission capability of the video load security isolation transmission private network module, and can effectively avoid the security isolation transmission private network module of a certain video loadThe congestion phenomenon caused by the overlarge load of the transmission private network module realizes the safe and reliable transmission of high-concurrency large-flow videos.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (10)
1. A high-concurrency large-flow video security isolation transmission method is characterized in that an internal network sends a video on demand request signaling to an external network through a video signaling detection module and security isolation equipment, the video on demand request signaling received by the external network sends corresponding video data to the internal network through the security isolation equipment, and the following steps are executed in the process:
step 1, after receiving a video on demand request signaling, a video signaling detection module deeply analyzes a video on demand request message, acquires 2-7-layer network protocol information, and acquires a source MAC address, a source IP address, a source port number, a destination IP address and a destination port number in the network protocol information, wherein the video signaling detection module firstly judges whether the video on demand request is legal or not, blocks the video on demand request which does not meet the requirement, and prevents illegal access;
step 2, the video signaling detection module forwards a legal video-on-demand request to a load forwarding control module;
step 3, a load detection module monitors and collects the load information of a video load security isolation transmission private network module in the security isolation equipment, and then sends the collected load information to a load statistical analysis module;
step 4, after receiving the load information collected by the load detection module, the load statistical analysis module performs calculation analysis on the load information to obtain an analysis result of the residual load processing capacity of the video load security isolation transmission private network module and sends the analysis result to the load forwarding control module;
step 5, the load forwarding control module manages and distributes video requests according to the analysis result and the received video on demand information, and diverts a video stream transmission path to the video load security isolation transmission private network module with the maximum residual load processing capacity;
and 6, the load security isolation transmission private network module realizes unidirectional isolation transmission of video streams, the video load security isolation transmission public network module acquires video data from a video source, an internal security transmission channel is adopted to send the data to the load security isolation transmission private network module, and the load security isolation transmission private network module sends the video data to a video monitoring center.
2. The high-concurrency high-traffic video security isolation transmission method according to claim 1, wherein in the step 1, the video signaling detection module deeply analyzes the vod request message, determines whether the message is legal, and blocks the vod request when there is an illegal vod request.
3. The high concurrency high traffic video security isolation transmission method according to claim 1, wherein in step 2, the video signaling detection module forwards a legal video on demand request to the load forwarding control module.
4. The high-concurrency high-traffic video security isolation transmission method according to claim 1, wherein in the step 3, the video load security isolation transmission private network module reports load information to the load detection module at regular time, and the load information includes a CPU utilization rate x%, a network port bandwidth utilization rate y%, and a concurrency connection number a.
5. The high concurrent high traffic video security isolation transmission method according to claim 4, wherein if a certain video load security isolation transmission private network module does not report load information in the reporting period, the load detection module sets the CPU utilization rate of the video load security isolation transmission private network module that does not report load information to x% =100%.
6. The high concurrent high traffic video safety isolation transmission method according to claim 1, wherein in the step 4, the load statistic analysis module calculates the remaining load processing capacity C of each video load safety isolation transmission private network module according to the following algorithm n ：
C n ＝[(1-x％)*F n ]*[(1-y％)*W n ]/a
Wherein, F n The master frequency of a CPU of equipment where a video load security isolation transmission private network module is located;
W n the maximum transmission bandwidth of the network card of the equipment where the video load security isolation transmission private network module is located;
x%: the CPU utilization rate of the video load security isolation transmission private network module;
y%: the network port bandwidth utilization rate of the video load security isolation transmission private network module;
a: and the video load safely isolates the number of concurrent connections of the transmission private network module.
7. The high concurrent high traffic video security isolation transmission method according to claim 1, wherein when a plurality of security isolation devices are installed between the intranet and the extranet, in step 5, the load forwarding control module distributes the video request to the C with the maximum remaining load processing capacity according to the analysis result and the received video-on-demand information n And the video load of the value is safely isolated on the transmission private network module.
8. The high concurrent high traffic video security isolation transmission method according to claim 6, wherein in the step 5, the load forwarding control module performs the analysis according to the analysis result obtained by the load statistical analysis moduleAccording to C n The video on-demand requests are managed and distributed in the order of magnitude from large to small, and the video streams are distributed to C n And the maximum video load is safely isolated from the private network transmission module.
9. A system for video transmission using the high concurrent high traffic video secure isolation transmission method of any one of claims 1 to 8, comprising:
the video signaling detection module is used for analyzing and forwarding a video on demand request signaling sent by an external network;
the safety isolation equipment is used for carrying out safety isolation on the outer net and the inner net; a video load safety isolation transmission private network module and a video load safety isolation transmission public network module are arranged in the safety isolation device;
the load detection module is used for monitoring and collecting the load information of the video load security isolation transmission private network module in the security isolation equipment and then sending the collected load information to the load statistical analysis module;
the load statistical analysis module is used for calculating and analyzing the load information after receiving the load information collected by the load detection module to obtain an analysis result of the residual load processing capacity of the video load security isolation transmission private network module and sending the analysis result to the load forwarding control module;
the load forwarding control module is used for managing and distributing the video request according to the analysis result and the received video-on-demand information;
the outer network sends a video on demand request signaling to the inner network sequentially through the video signaling detection module, the video load security isolation transmission private network module and the video load security isolation transmission public network module, and the inner network sends video data to the outer network sequentially through the video load security isolation transmission public network module and the video load security isolation transmission private network module; the video load security isolation transmission private network module is in communication connection with the load detection module, the load detection module is in communication connection with the load statistical analysis module, the load statistical analysis module is in communication connection with the load forwarding control module, and the load forwarding control module is in communication connection with the video signaling detection module.
10. The system according to claim 9, wherein a traffic filtering module is configured on the video load security isolation transmission public network module, and the traffic filtering module is configured to prevent abnormal video traffic from passing through the video security isolation transmission public network module.
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