CN111526331A - Cascade networking method and cascade networking system - Google Patents
Cascade networking method and cascade networking system Download PDFInfo
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- CN111526331A CN111526331A CN202010308117.1A CN202010308117A CN111526331A CN 111526331 A CN111526331 A CN 111526331A CN 202010308117 A CN202010308117 A CN 202010308117A CN 111526331 A CN111526331 A CN 111526331A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
Abstract
The application discloses a cascade networking method and a cascade networking system, wherein the cascade networking method comprises the following steps: the accessed back-end video processing equipment sends a detection request message in a wired broadcast search and/or wireless detection request mode to obtain information whether at least another back-end video processing equipment supports cascade connection; if a detection reply message returned by at least another back-end video processing device is received, analyzing the detection reply message, and further judging whether the at least another back-end video processing device has the cascade capability; and if at least one other back-end video processing device has the cascade capability, returning the service set identification information in the detection reply message to the last back-end video processing device or sharing the service set identification information to the front-end video acquiring device, and further enabling the front-end video acquiring device to start cascade. By the mode, the service set identification information of all the back-end video processing devices can be shared, the front-end video acquisition device can be conveniently cascaded, and the coverage range of a cascade networking system is enlarged.
Description
Technical Field
The present application relates to the field of wireless video transmission technologies, and in particular, to a cascade networking method and a cascade networking system.
Background
Video acquisition equipment and Video processing equipment are important components of a security system, and the Video processing equipment such as an NVR (Network Video Recorder) is used for receiving Video data uploaded by the Video acquisition equipment such as an IPC (IP Camera) and storing, managing and forwarding the Video data.
When the range of video monitoring needs to be enlarged or more interference sources for video data transmission exist in a monitoring area, the signal coverage of a single video processing device is insufficient, and further, the video data transmission between the video acquisition device and the video processing device which are not covered by the signal is interrupted, so that the stability of the video data transmission is influenced.
Disclosure of Invention
The method and the system for cascade networking are mainly used for solving the technical problem that the cascade networking method and the cascade networking system are provided, the front-end video acquisition equipment can be conveniently cascaded, and the coverage range of the cascade networking system is enlarged.
In order to solve the technical problem, the application adopts a technical scheme that: a method for cascade networking is provided, which comprises:
the accessed back-end video processing equipment sends a detection request message in a wired broadcast search and/or wireless detection request mode to obtain information whether at least another back-end video processing equipment supports cascade connection; if a detection reply message returned by the at least another back-end video processing device is received, analyzing the detection reply message, and further judging whether the at least another back-end video processing device has the cascade capability; and if the at least one other back-end video processing device has the cascade capability, returning the service set identification information in the detection reply message to the last back-end video processing device or sharing the service set identification information to the front-end video acquiring device, so that the front-end video acquiring device starts cascade connection.
The detection request message comprises the equipment model, the cascade capability identification and a service set identification information list of the accessed back-end video processing equipment; the detection reply message includes the device model, the cascade capability identifier and the service set identifier information list of the at least another back-end video processing device.
Wherein, before the step of sending a detection request message by the accessed backend video processing device in a wired broadcast search and/or wireless detection request manner to obtain whether at least another backend video processing device supports the cascaded information, the method includes: the accessed back-end video processing equipment acquires a detection request message of the last back-end video processing equipment; and the accessed back-end video processing equipment acquires the cached service set identification information and adds the cached service set identification information into a service set identification information list of the detection request message.
Wherein, the service set identification information list of the detection reply message includes: service set identification information of the at least another back-end video processing device, and service set identification information in a service set identification information list of the probe request packet.
Wherein, if the at least another back-end video processing device has the cascade capability, returning the service set identification information in the detection reply message to the last back-end video processing device or sharing the service set identification information to the front-end video acquiring device, so as to enable the front-end video acquiring device to start the cascade step, including: the accessed back-end video processing equipment acquires the service set identification information in the service set identification information list of the detection reply message so that the accessed back-end video processing equipment acquires all the service set identification information of all the back-end video processing equipment; the accessed back-end video processing equipment returns the identification information of all the service sets to the last back-end video processing equipment; or, the accessed back-end video processing device shares the identification information of all service sets to the front-end video acquiring device.
Wherein, the step of sharing the identification information of all service sets by the accessed back-end video processing device to the front-end video acquiring device includes: the accessed back-end video processing equipment shares all the service set identification information to the accessed front-end video acquisition equipment, and then each front-end video acquisition equipment selects the back-end video processing equipment with the best signal intensity to carry out cascade connection; or, the accessed back-end video processing device shares all the service set identification information to the accessed front-end video acquisition device and the newly accessed front-end video acquisition device, and then each front-end video acquisition device selects the back-end video processing device with the best signal intensity to carry out cascade connection.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a cascade networking system, including:
the system comprises a front-end video acquisition device and at least two rear-end video processing devices; the back-end video processing equipment is used for sending a detection request message in a wired broadcast search and/or wireless detection request mode so as to obtain information whether at least another back-end video processing equipment supports cascade connection; if a detection reply message returned by the at least another back-end video processing device is received, the back-end video processing device is further used for analyzing the detection reply message, and further judging whether the at least another back-end video processing device has the cascade capability; if the at least one other back-end video processing device has the cascade capability, the one back-end video processing device is further configured to return the service set identification information in the detection reply message to the last back-end video processing device or share the service set identification information to the front-end video acquiring device, so that the front-end video acquiring device starts cascade; the front-end video acquisition equipment is used for acquiring video data information and uploading the video data information to any one of the back-end video processing equipment.
The front-end video acquiring device is further configured to receive service set identification information shared by the back-end video processing devices, and the front-end video acquiring device selects the back-end video processing device with the best signal strength to perform cascade connection.
Wherein, when arbitrary front end video acquisition equipment detects the not good time of network transmission state between the rear end video processing equipment rather than being connected, and the not good front end video acquisition equipment of network transmission state between the rear end video processing equipment further is used for: and re-acquiring the service set identification information shared by the back-end video processing equipment, and selecting the back-end video processing equipment with the best signal intensity for connection.
The detection request message comprises the equipment model of the back-end video processing equipment, a cascade capability identifier and a service set identifier information list; the detection reply message includes the device model, the cascade capability identifier and the service set identifier information list of the at least another back-end video processing device.
The beneficial effect of this application is: after determining that at least another back-end video processing device supports cascade connection, the accessed back-end video processing device shares the service set identification information of all back-end video processing devices to other back-end video processing devices and the front-end video acquisition device in the cascade networking system, and then the front-end video acquisition device can start to be automatically matched and connected with the back-end video processing devices according to all the service set identification information.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a schematic network topology diagram of an embodiment of a back-end video processing device and a front-end video acquiring device in the present application;
FIG. 2 is a flowchart illustrating an embodiment of a method for cascading networks according to the present application;
fig. 3 is a schematic flowchart illustrating an embodiment of a probe request message and a probe reply message between backend video processing devices according to the present application;
FIG. 4 is a flowchart illustrating a method for cascaded networking according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship. Further, the term "plurality" herein means two or more than two.
For convenience of understanding, a network topology structure of the backend video processing device and the frontend video acquiring device in the present application is first illustrated, and specifically, with reference to fig. 1, fig. 1 is a schematic network topology diagram of an embodiment of the backend video processing device and the frontend video acquiring device in the present application. Of course, in other embodiments, a network topology different from the schematic diagram shown in fig. 1 may exist, and the network topology shown in fig. 1 does not limit the network topology in practical applications. Specifically, a plurality of backend video processing devices and front-end video obtaining devices may be included, where the backend video processing devices are connected by a wire (e.g., twisted pair, optical fiber, coaxial cable, etc.), and each backend video processing device may be connected to at least one front-end video obtaining device by a wire or wirelessly. Specifically, in fig. 1, the application site may be configured with a back-end video processing device 21 to a back-end video processing device 23, and a front-end video acquiring device 11 to a front-end video acquiring device 17. In other embodiments, different numbers of the back-end video processing devices and the front-end video acquiring devices can be selected and adapted according to the requirements of specific application places. In an implementation scenario, the back-end video processing device may specifically be an NVR, and the front-end video acquiring device may specifically be an IPC.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for cascading networks according to an embodiment of the present application. Specifically, the cascade networking method comprises the following steps:
step S101: the accessed back-end video processing equipment sends a detection request message in a wired broadcast search and/or wireless detection request mode.
Specifically, in step S101, the accessed backend video processing device sends a probe request message in at least one of the modes of cable broadcast search and wireless probe request, where the probe request message includes private information of the accessed backend video processing device, such as: a device model, a cascade capability identifier, and a service set identifier information list. And the detection request message also includes a request frame, and the request frame is used for initiating a judgment request on whether the other backend video processing devices support the cascade connection, so as to obtain information on whether at least another backend video processing device supports the cascade connection.
The detection request message is sent in a wired broadcast search mode or a wireless detection request mode, and the detection request message conforms to a preset message format.
Step S102: and judging whether a detection reply message returned by at least another back-end video processing device is received.
Specifically, after the probe request message is sent, the accessed backend video processing device may wait for whether the probe reply message is received according to a preset time threshold (e.g., 1S, 2S, or 5S), and if so, execute step S103, and if not, execute step S106. Wherein, the detection reply message includes private information of at least another backend video processing device, such as: a device model, a cascade capability identifier, and a service set identifier information list. The private information of the back-end video processing equipment contained in the detection request message and the detection reply message is beneficial to judging whether the equipment is matched or not among the back-end video processing equipment, the probability of equipment error access is reduced, the sharing of service set identification information is facilitated, and the efficiency and the accuracy of forming the cascade networking are improved.
Referring to fig. 3, fig. 3 is a schematic flowchart illustrating an embodiment of a probe request message and a probe reply message between backend video processing devices according to the present application. The message data interaction shown in fig. 3 is only schematic, and in an actual implementation scenario, the current back-end video processing device may simultaneously send a detection request message to all other back-end video processing devices in the cascade networking system, or may sequentially send a detection request message to the next back-end video processing device in the cascade networking system.
The data format of the private information in the detection reply message is the same as that of the private information in the detection request message.
Step S103: and analyzing the detection reply message.
Specifically, in step S103, after receiving the detection reply message, the accessed backend video processing device determines the cascade capability identifier in the detection reply message. Wherein, the cascade capability identifier is 1 to indicate that the device supports cascade, and the cascade capability identifier is 0 to indicate that the device does not support cascade. Of course, the concatenation capability identification may be any symbol other than the above.
Step S104: and judging whether at least one other back-end video processing device has the cascade capability.
Specifically, in step S104, after the accessed backend video processing device confirms that the concatenation capability identifier in the detection reply message of another backend video processing device is 1, step S105 is executed, otherwise step S106 is executed.
Step S105: and returning the service set identification information in the detection reply message to the last back-end video processing equipment or sharing the service set identification information to the front-end video acquiring equipment, so that the front-end video acquiring equipment starts cascading.
Specifically, in step S105, the accessed backend video processing device further analyzes the service set identifier information in the service set identifier list in the probe reply message, and then returns the service set identifier information to the last backend video processing device. Through the interaction of messages among the back-end video processing devices, the back-end video processing devices acquire service set identification information of all the back-end video processing devices, all the service set identification information is shared to the front-end video acquisition device, and then the front-end video acquisition device automatically selects one back-end video processing device for cascade connection according to all the service set identification information. For example, the front-end video acquiring device selects the closest rear-end video processing device to cascade; or selecting the rear-end video processing equipment with the strongest signal for cascading; or selecting the back-end video processing equipment which has the least access to the front-end video acquisition equipment for cascade connection.
Step S106: and ending the flow.
Referring to fig. 1, in a specific application scenario, the backend video processing device 22 is used as an accessed backend video processing device, the backend video processing device 23 is used as at least another backend video processing device, the backend video processing device 21 is used as a previous backend video processing device for explanation, and the cascade networking system includes only the backend video processing device 21 and the backend video processing device 22 in the first place, and the backend video processing device 23 is a backend video processing device newly accessed to the cascade networking system.
The backend video processing device 22 sends a detection request message to all backend video processing devices in the cascade networking system by means of a wired broadcast search and/or a wireless detection request. After receiving the detection request message, the back-end video processing device 23 sends a detection reply message to the back-end video processing device 22, and then the back-end video processing device 22 analyzes the service set identification information in the detection reply message after confirming that the back-end video processing device 23 has the cascade capability. The back-end video processing device 22 returns the service set identification information in the service set identification list in the detection reply message of the back-end video processing device 23 to the back-end video processing device 21, or shares the service set identification information to the front-end video acquiring device 11 to the front-end video acquiring device 17, and then any front-end video acquiring device can select the back-end video processing device with the strongest signal to perform cascade connection.
For the cascade system shown in fig. 1, the front-end video capture device 15 and the back-end video processing device 21 originally have a long distance and need to traverse two walls, so that there is a problem of unstable connection. After the new access to the back-end video processing device 23, the front-end video acquiring device 15 may be cascaded with the back-end video processing device 23, so as to improve the stability and reliability of video data transmission. And after the coverage range of the back-end video processing equipment in the cascade networking is expanded, other front-end video acquisition equipment can be further expanded in the cascade networking system to expand the monitoring range.
In the cascade networking method provided in this embodiment, after the accessed backend video processing device determines that at least another backend video processing device supports cascade connection, sharing the service set identification information of all the back-end video processing devices to other back-end video processing devices and front-end video acquisition devices in the cascade networking system, furthermore, the front-end video acquisition equipment can start to be automatically matched and connected with the back-end video processing equipment according to all the service set identification information, obviously, the automatic cascading of the front-end video acquisition equipment improves the efficiency of forming a cascading networking system, and the coverage area of the cascade networking system is correspondingly enlarged after the new rear-end video processing equipment is accessed, and the front-end video acquisition equipment which is not originally covered by the signals of the rear-end video processing equipment is also automatically connected with the rear-end video processing equipment so as to further enlarge the coverage area of video monitoring.
In another embodiment, please refer to fig. 4, where fig. 4 is a schematic flowchart illustrating a method for cascading networks according to another embodiment of the present application. This embodiment is a further extension of the previous embodiment, and steps S203 to S206 in this embodiment correspond to steps S101 to S104 in the previous embodiment, which are not described herein again. In this embodiment, step S203 further includes:
step S201: and the accessed back-end video processing equipment acquires the detection request message of the last back-end video processing equipment.
Specifically, in the step S201, please refer to fig. 1, in a specific application scenario, the backend video processing device 22 is taken as an accessed backend video processing device, the backend video processing device 23 is taken as at least another backend video processing device, and the backend video processing device 21 is taken as a last backend video processing device for explanation. The back-end video processing device 22 receives the probe request message sent by the back-end video processing device 21, where the probe request message sent by the back-end video processing device 21 includes the service set identification information of the back-end video processing device 21.
Step S202: and the accessed back-end video processing equipment acquires the cached service set identification information and adds the cached service set identification information into a service set identification information list of the detection request message.
Specifically, in step S202, please refer to fig. 1 in combination, the backend video processing device 22 obtains the service set identification information that is cached on the device storage device before. If the backend video processing device 21 is in the same cascade networking system before and is matched with the backend video processing device 22, the cached service set identification information includes the service set identification information of the backend video processing device 21. The backend video processing device 22 adds the cached service set identification information to the service set identification information list of the probe request packet, and shares the cached service set identification information to another backend video processing device 23.
Through the steps S201 and S202, the service set identification information in the original cascade system can be quickly shared to the newly accessed backend video processing device, and data interaction between all the backend video processing devices is completed. All the back-end video processing equipment can quickly obtain all the service set identification information, and the efficiency of the cascade networking is effectively improved.
Further, after the other backend video processing device 23 receives the probe request message sent by the backend video processing device 22, the other backend video processing device 23 adds the service set identification information of its own to the service set identification information list in the probe reply message, so that the service set identification information list in the probe reply message includes the service set identification information of the other backend video processing device 23 and the service set identification information in the service set identification information list of the probe request message sent by the backend video processing device 22.
It can be understood that, if the accessed backend video processing device receives a plurality of detection reply messages, the accessed backend video processing device stores information in the service set identification list in all the detection reply messages, and shares new cached service set identification information to all other backend video processing devices when the detection request message is sent next time. Furthermore, all service set identification information can be rapidly shared among all the back-end video processing devices through the interaction of messages among the back-end video processing devices.
In this embodiment, after step S206, the method further includes:
step S207: the accessed back-end video processing equipment acquires the service set identification information in the service set identification information list of the detection reply message, so that the accessed back-end video processing equipment acquires all the service set identification information of all the back-end video processing equipment.
Specifically, in step S207, since the detection reply message includes the service set identification information of the newly accessed backend video processing device and the service set identification information that has been cached, the accessed backend video processing device may obtain all the service set identification information.
Step S208: and the accessed back-end video processing equipment returns all the service set identification information to the last back-end video processing equipment.
Specifically, in step S208, the last backend video processing device obtains all service set identification information.
Step S209: and the accessed back-end video processing equipment shares all service set identification information to the front-end video acquiring equipment.
Specifically, in step S209, the front-end video acquiring device obtains all service set identification information. And then the front-end video acquisition equipment can automatically select a rear-end video processing equipment for cascade connection according to all service set identification information so as to improve the speed of connection between the front-end video acquisition equipment and the rear-end video processing equipment, and the front-end video acquisition equipment can preferentially select the rear-end video processing equipment with stronger signals or closer distance so as to improve the stability of the signals.
Further, in a specific scenario, the accessed backend video processing device shares all service set identification information to the accessed frontend video acquisition device, and then each frontend video acquisition device selects the backend video processing device with the best signal strength for cascade connection. Since the front-end video acquisition device is connected with the back-end video processing device with the strongest signal, the stability of video data transmission between the front-end video acquisition device and the back-end video processing device is improved.
Or, in another specific application scenario, the accessed back-end video processing device shares all service set identification information to the accessed front-end video acquiring device and the newly accessed front-end video acquiring device, and then each front-end video acquiring device selects the back-end video processing device with the best signal strength for cascading. Besides the accessed front-end video acquisition equipment in the original-level contact system, the newly accessed front-end video acquisition equipment is also expanded in the application scene, and then the newly accessed front-end video acquisition equipment automatically selects the rear-end video processing equipment for cascade connection, so that the coverage range of video monitoring is expanded finally.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of the present application of a cascaded networking system. The cascading networking system 30 includes a front-end video acquisition device 40 and at least two back-end video processing devices 50 and 51. One of the backend video processing devices 50 is configured to send a probe request packet in a cable broadcast search and/or wireless probe request manner, so as to obtain information about whether at least another backend video processing device 51 supports cascading. If the detection reply message returned by at least another back-end video processing device 51 is received, a back-end video processing device 50 is further configured to analyze the detection reply message, and further determine whether the at least another back-end video processing device 51 has the cascade capability. If at least another back-end video processing device 51 has the cascade capability, a back-end video processing device 50 is further configured to share the service set identification information in the detection reply message to the front-end video obtaining device 40, so that the front-end video obtaining device 40 starts cascade connection. If the tandem networking system 30 further includes a last backend video processing device (e.g., 5N), a backend video processing device 50 is further configured to return the service set identification information in the probe reply message to the last backend video processing device 5N.
The front-end video acquiring device 40 is configured to acquire video data information and upload the video data information to any one of the back-end video processing devices 50-5N.
The probe request message includes a device model of the back-end video processing device 50, a cascade capability identifier, and a service set identifier information list. The detection reply message includes the device model, the cascade capability identifier, and the service set identifier information list of at least another backend video processing device 51. And then the rear-end video processing device 50 and the rear-end video processing device 51 can analyze whether the devices are the same type of the same manufacturer according to the information in the message, and judge whether the devices are matched and compatible, and whether the devices support cascading, so as to reduce the probability of mistaken access of the devices and improve the safety of the cascading networking system 30. In addition, the backend video processing device 50 and the backend video processing device 51 can also obtain the service set identification information stored in the devices, so as to share the service set identification information, thereby improving the networking efficiency of the cascade networking system 30.
In a specific application scenario, the front-end video capture device 40 is further configured to receive service set identification information shared by the back-end video processing devices 50, the front-end video capture device 40 may determine the signal strength sent by the back-end video processing devices 50-5N, and the front-end video capture device 40 is preset to select the back-end video processing devices 50-5N according to the signal strength. And then the front-end video acquisition device 40 selects the back-end video processing device 50-5N with the best signal strength for cascade connection, so that the speed and stability of video data transmission are improved.
In another specific application scenario, after the front-end video acquiring device 40 is connected to the back-end video processing devices 50, when any front-end video acquiring device 40 detects that the network transmission state between the back-end video processing devices 50 connected thereto is not good, the front-end video acquiring device 40 with the back-end video processing devices 50 in the poor network transmission state is further configured to reacquire the service set identification information shared by the back-end video processing devices 50, and select the one with the best signal strength among the back-end video processing devices 50-5N for cascading. The front-end video acquiring device 40 has a self-checking function, and can detect the signal intensity state between the front-end video acquiring device 40 and the rear-end video processing device 50 when the video data transmission is unstable, and when the signal is poor, the front-end video acquiring device 40 judges the signal intensity sent by the rear-end video processing device 50-5N after receiving all the service set identification information again, and selects the best signal intensity for cascade connection, so as to further improve the stability of the video data transmission and further improve the reliability of the cascade networking system 30.
In the cascade networking system 30 provided in this embodiment, the back-end video processing device 50 may share all service set identification information to all the front-end video acquiring devices 40, and the front-end video acquiring devices automatically select the connection with the strongest signal in the back-end video processing devices 50-5N from all the service set identification information, so that the probability of video data loss is reduced, and the reliability of the cascade networking system 30 is improved.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A method for cascading network deployment, the method comprising:
the accessed back-end video processing equipment sends a detection request message in a wired broadcast search and/or wireless detection request mode to obtain information whether at least another back-end video processing equipment supports cascade connection;
if a detection reply message returned by the at least another back-end video processing device is received, analyzing the detection reply message, and further judging whether the at least another back-end video processing device has the cascade capability;
and if the at least one other back-end video processing device has the cascade capability, returning the service set identification information in the detection reply message to the last back-end video processing device or sharing the service set identification information to the front-end video acquiring device, so that the front-end video acquiring device starts cascade connection.
2. The cascaded networking method of claim 1,
the detection request message comprises the equipment model, the cascade capability identification and the service set identification information list of the accessed back-end video processing equipment;
the detection reply message includes the device model, the cascade capability identifier and the service set identifier information list of the at least another back-end video processing device.
3. The cascade networking method according to claim 2, wherein the step of sending the probe request message by the accessed backend video processing device through a cable broadcast search and/or a wireless probe request to obtain information whether at least another backend video processing device supports cascade connection is preceded by the step of:
the accessed back-end video processing equipment acquires a detection request message of the last back-end video processing equipment;
and the accessed back-end video processing equipment acquires the cached service set identification information and adds the cached service set identification information into a service set identification information list of the detection request message.
4. The method according to claim 2, wherein the list of service set identification information of the probe reply packet comprises:
service set identification information of the at least another back-end video processing device, and service set identification information in a service set identification information list of the probe request packet.
5. The cascade networking method according to claim 4, wherein if the at least another backend video processing device has a cascade capability, the step of returning the service set identifier information in the probe reply message to a previous backend video processing device or sharing the service set identifier information to a front-end video acquiring device, so that the front-end video acquiring device starts cascade connection includes:
the accessed back-end video processing equipment acquires the service set identification information in the service set identification information list of the detection reply message so that the accessed back-end video processing equipment acquires all the service set identification information of all the back-end video processing equipment;
the accessed back-end video processing equipment returns the identification information of all the service sets to the last back-end video processing equipment; alternatively, the first and second electrodes may be,
and the accessed back-end video processing equipment shares the identification information of all the service sets to the front-end video acquisition equipment.
6. The cascade networking method according to claim 5, wherein the step of sharing the identification information of all service sets by the accessed backend video processing device to the front-end video obtaining device comprises:
the accessed back-end video processing equipment shares all the service set identification information to the accessed front-end video acquisition equipment, and then each front-end video acquisition equipment selects the back-end video processing equipment with the best signal intensity to carry out cascade connection; alternatively, the first and second electrodes may be,
and the accessed back-end video processing equipment shares all the service set identification information to the accessed front-end video acquisition equipment and the newly accessed front-end video acquisition equipment, and then each front-end video acquisition equipment selects the back-end video processing equipment with the best signal intensity to carry out cascade connection.
7. A cascading networking system, comprising:
the system comprises a front-end video acquisition device and at least two rear-end video processing devices;
the back-end video processing equipment is used for sending a detection request message in a wired broadcast search and/or wireless detection request mode so as to obtain information whether at least another back-end video processing equipment supports cascade connection;
if a detection reply message returned by the at least another back-end video processing device is received, the back-end video processing device is further used for analyzing the detection reply message, and further judging whether the at least another back-end video processing device has the cascade capability;
if the at least one other back-end video processing device has the cascade capability, the one back-end video processing device is further configured to return the service set identification information in the detection reply message to the last back-end video processing device or share the service set identification information to the front-end video acquiring device, so that the front-end video acquiring device starts cascade;
the front-end video acquisition equipment is used for acquiring video data information and uploading the video data information to any one of the back-end video processing equipment.
8. The tandem networking system of claim 7,
the front-end video acquiring device is further configured to receive service set identification information shared by the back-end video processing devices, and the front-end video acquiring device selects the back-end video processing device with the best signal strength to perform cascade connection.
9. The cascade networking system of claim 8, wherein when any of the front-end video capturing devices detects that a network transmission state between the back-end video processing devices connected thereto is bad, the front-end video capturing device with the bad network transmission state between the back-end video processing devices is further configured to:
and re-acquiring the service set identification information shared by the back-end video processing equipment, and selecting the back-end video processing equipment with the best signal intensity for connection.
10. The tandem networking system of claim 7,
the detection request message comprises the equipment model of the back-end video processing equipment, a cascade capability identifier and a service set identifier information list;
the detection reply message includes the device model, the cascade capability identifier and the service set identifier information list of the at least another back-end video processing device.
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