CN104811362A - Data transmission method for multi-hierarchy network and network bridge equipment - Google Patents

Abstract

The embodiment of the invention discloses a multi-level network data transmission method and a network bridge device, which are used to improve the utilization rate of data segments and reduce bandwidth waste. The method in the embodiment of the present invention includes: receiving data from the first network and data from the second network, and storing the received data, wherein the first network is the upper layer network of the bridge device, and the second network is the network bridge device The next layer of network; extracting the cross-level interaction data of the first network and the same-level interaction data of the second network from the data, and extracting the cross-level interaction data of the second network and the same-level interaction data of the first network; The cross-level interaction data of the network and the same-level interaction data of the second network are sent to the devices in the second network, and the cross-level interaction data of the second network and the same-level interaction data of the first network are sent to the devices in the first network equipment. The embodiments of the present invention can improve the utilization rate of data segments and reduce bandwidth waste.

Description

Data transmission method and network bridge device of a multi-level network

technical field

The invention relates to the technical field of industrial communication, in particular to a data transmission method of a multi-level network and a network bridge device.

Background technique

With the development of communication technology, Ethernet is gradually applied to the industrial field due to its good openness, wide application and low price. Many important infrastructures and industrial sites have begun to use industrial Ethernet for data interaction and communication at the field device level. Because in practical applications, it is often necessary to face different application environments and different network topologies, the importance of multi-level networks is self-evident.

At present, the first aspect of research on data transmission in multi-level networks focuses on the analysis of routing methods in the field of wireless communication. Generally, the research objects are node capabilities and routing hops. The main purpose is to design an energy-efficient and complete Network data transmission method; the second aspect focuses on solving the problem of network transmission packet loss in long-distance multi-level networks. Using the fountain algorithm to encode and decode the source node and the destination node respectively, it can better solve the problem caused by the automatic retransmission request mechanism. The problem of packet loss caused by low efficiency; the third aspect focuses on solving the security problem of data transmission, using intermediate devices such as gatekeepers to perform authorization inspections on data transmission between the core network (upper network) and the peripheral network (lower network) , identity authentication, and at the same time bind the destination Media Access Control (MAC, Medium Access Control) address, source MAC address, destination Internet Protocol (IP, Internet Protocol) address and source IP address in the transmitted data packet to find addresses and data distribution.

However, the research method of the first aspect ignores the topology structure of the node and the reliability and real-time performance of its data transmission; the research method of the second aspect not only increases the calculation amount of the node equipment due to the introduction of encoding and decoding operations, but also As a result, the average arrival delay of the original data packet becomes longer, which ultimately makes the utilization rate of the data segment of this type of data transmission method lower, causing unnecessary bandwidth waste; Requirements, there are many extra fields contained in the data packet, resulting in a small proportion of effectively transmitted data, and there are also problems of low data segment utilization and bandwidth waste.

Contents of the invention

The embodiment of the present invention provides a data transmission method and a network bridge device of a multi-level network, which can improve the utilization rate of data segments and reduce bandwidth waste.

The embodiment of the present invention has the following advantages: the bridge device receives the data from the first network and the data from the second network, and saves the received data, the first network is the upper layer network of the bridge device, and the second network The network is the next-level network of the bridge device; the bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the data, and extracts the cross-level interaction data of the second network The interaction data and the same-level interaction data of the first network; the bridge device sends the cross-level interaction data of the first network and the same-level interaction data of the second network to devices in the second network, and sends the first network The cross-level interaction data of the second network and the same-level interaction data of the first network are sent to devices in the first network. Since the cross-level interaction data received by the devices in the first network and the devices in the second network are valid data without additional data fields, the utilization rate of data segments can be improved and bandwidth waste can be reduced.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of an embodiment of a data transmission method of a multi-level network in an embodiment of the present invention;

FIG. 2 is a schematic diagram of another embodiment of a data transmission method in a multi-level network in an embodiment of the present invention;

FIG. 3 is a schematic diagram of an embodiment of a network bridge device in an embodiment of the present invention;

Fig. 4 is a schematic diagram of another embodiment of the network bridge device in the embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a data transmission method and a network bridge device for a multi-level network, which are used to improve the utilization rate of data segments and reduce bandwidth waste.

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Referring to Fig. 1, an embodiment of a data transmission method of a multi-level network in an embodiment of the present invention includes:

101. The bridge device receives data from the first network and data from the second network, and saves the received data. The first network is the upper layer network of the bridge device, and the second network is the bridge device the next layer of network;

In this embodiment, the network bridge device receives the data of the upper layer network of the network bridge device and the data of the lower layer network of the network bridge device, and saves the received data.

It should be noted that the data of the first network comes from devices in the first network, and there may be one or more devices in the first network. Similarly, the data of the second network comes from devices in the second network. There can be one or more devices in the network.

102. The bridge device extracts the cross-layer interaction data of the first network and the same-layer interaction data of the second network from the data, and extracts the cross-layer interaction data of the second network and the same-layer interaction data of the first network interactive data;

After the data is saved, the bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the stored data, and extracts the cross-level interaction data of the second network and the interaction data of the first network. Interact data at the same level.

103. The network bridge device sends the cross-level interaction data of the first network and the same-level interaction data of the second network to devices in the second network, and sends the cross-level interaction data of the second network and the first The same-level interaction data of the network is sent to the device in the first network.

The bridge device sends the cross-level interaction data of the first network and the same-level interaction data of the second network to devices in the second network through the communication port of the lower layer network, and sends the communication data of the second network to the devices in the second network through the communication port of the upper layer network. The cross-level interaction data and the same-level interaction data of the first network are sent to devices in the first network.

It should be noted that each device in the first network and each device in the second network extracts the cross-level interaction data and same-level interaction data belonging to the device after receiving the cross-level interaction setting and same-level interaction data, and save them separately.

In this embodiment, since the cross-level interaction data received by the devices in the first network and the devices in the second network are valid data without additional data fields, the utilization rate of data segments can be improved and bandwidth waste can be reduced.

For ease of understanding, the data transmission method of the multi-level network in the embodiment of the present invention is described in detail below, please refer to FIG. 2. Another embodiment of the data transmission method of the multi-level network in the embodiment of the present invention includes:

201. The bridge device receives data from the first network and data from the second network through preconfigured configuration information;

In this embodiment, the network bridge device receives the data from the first network by the upper layer communication port of the network bridge device, and receives the data from the first network by the lower layer communication port of the network bridge device within the specified time slice through the pre-configured configuration information. Two network data.

Wherein, the configuration information includes scheduling sequence information, and the configuration information refers to the configuration information that the network bridge device needs to write before working (the configuration information of each network bridge device is different, it can be calculated manually, or can be automatically generated by software), the configuration information includes two aspects: on the one hand, the communication attribute parameters configured for the bridge device, including the network address, cycle time length and time slice length of the bridge device; on the other hand It is the data link relationship, which stores the message data link relationship between all other devices and the bridge device, that is, which segment or segments of data in the message sent by any other device are sent to the bridge device, and the network The bridge device extracts the required data from the received message according to the link relationship. The above-mentioned first network is the upper layer network of the bridge device, and the above-mentioned second network is the lower layer network of the bridge device; the upper layer network and the lower layer network can be any topology, including: topological structure, ring topology or linear topology, as well as other types of topologies, which will not be repeated here; the next layer network performs clock synchronization based on the clock of the upper layer network, and finally realizes The top-level network is synchronized across the entire network.

It should be noted that the network bridge device independently participates in communication scheduling and data transmission in the first network and the second network, and at the same time completes the clock information transmission of the upper-layer network to the lower-layer network, and the communication between the upper-layer network and the lower-layer network. data interaction between them.

Further, the data of the first network comes from devices in the first network, and there may be one or more devices in the first network. Similarly, the data of the second network comes from devices in the second network, and the devices in the second network There can be one or more devices.

It can be understood that if the sum of the upper-layer communication ports and the lower-layer communication ports is not less than three, multiple upper-layer networks and multiple lower-layer networks can be cascaded at the same time to achieve the purpose of expanding the network scale.

202. The network bridge device respectively extracts same-level interaction data from the received data, and respectively extracts cross-level interaction data;

According to the preset configuration information, the bridge device extracts the same-level interaction data from the upper-layer network and the lower-layer network from the received data, and extracts the cross-level data from the upper-layer network and the lower-layer network respectively. Hierarchical interaction data.

203. The network bridge device respectively stores the above-mentioned same-level interaction data, and stores the above-mentioned cross-level interaction data of the first network in an orderly manner according to the IP of the device corresponding to the above-mentioned cross-level interaction data, and stores the above-mentioned first network in an orderly manner according to the IP. Cross-level interaction data of the second network;

The bridge device respectively stores the same-level interaction data from the first network, the cross-level interaction data from the first network, the same-level interaction data from the second network, and the cross-level interaction data from the second network through four buffer storage areas, and at the same time , when storing the cross-level interaction data of the first network, the storage order is determined by the IP size of the device corresponding to the cross-level interaction data. When the value of the IP is smaller, the storage order is higher. Similarly, the storage order of the cross-level interaction data of the second network is similar to the storage order of the cross-level interaction data of the first network, and details are not repeated here.

It should be noted that other methods may also be used to determine the storage order, including but not limited to according to the IP size as the storage order, which is not specifically limited here.

It can be understood that the above four kinds of data may also be stored through other storage media, which is not specifically limited here.

Further, the bridge device includes at least four different storage areas.

204. The network bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the data according to a preset scheduling sequence, and extracts the cross-level interaction data of the second network and the Same-level interaction data of the first network;

After the data is saved, the bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the saved data according to the preset scheduling order, and extracts the cross-level interaction data of the second network Exchanging data with the same level of the first network.

205. The network bridge device sends the cross-level interaction data of the first network and the same-level interaction data of the second network to devices in the second network, and sends the cross-level interaction data of the second network and the first The same-level interaction data of the network is sent to the device in the first network.

The bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network according to a preset scheduling sequence, and extracts the cross-level interaction data of the second network and the same-level interaction data of the first network After the interaction data, group the cross-level interaction data of the first network and the cross-level interaction data of the second network, and pass the cross-level interaction data of the first network and the same-level interaction data of the second network through the lower communication port Send to the device in the second network, and send the cross-level interaction data of the second network and the same-level interaction data of the first network to the device in the first network through the upper layer communication port.

It should be noted that each device in the first network and each device in the second network extracts the cross-level interaction data and same-level interaction data belonging to the device after receiving the cross-level interaction setting and same-level interaction data, and save them separately.

In this embodiment, since the cross-level interaction data received by the devices in the first network and the devices in the second network are valid data without additional data fields, the utilization rate of data segments can be improved and bandwidth waste can be reduced.

Secondly, this embodiment uses at least four different storage areas to respectively store the same-level interaction data from the first network, the cross-level interaction data of the first network, the same-level interaction data of the second network, and the cross-level interaction data of the second network. The interactive data and the storage order of cross-level interactive data are determined by the size of the IP, which improves the selectivity of the solution.

For ease of understanding, the following describes the data transmission method of the multi-level network in the embodiment of the present invention in an actual application scenario:

The first network and the second network are connected through a bridge device, wherein the first network is the upper layer network of the bridge device, and the second network is the lower layer network of the bridge device, and the first network includes two devices , are respectively device A and device B, and the second network includes two devices, which are respectively device C and device D. The bridge device receives the cross-level interaction data of device A, the cross-level interaction data of device B, and the same-level interaction data between device A and device B through the upper-layer communication interface, and receives the cross-level interaction data of device C through the lower-layer communication interface , cross-level interaction data of device D, and same-level interaction data between device C and device D. The four different buffer storage areas a, b, c, and d of the bridge device respectively store the above four kinds of data in sequence. The interaction data, the same-level interaction data of device C, and the same-level interaction data of device D are sent to device C and device D. At the same time, the same-level interaction data of device A, the same-level interaction data of device B, and the cross-level interaction data of device C The interaction data and cross-level interaction data of device D are sent to device A and device B. Device A, device B, device C, and device D extract their own cross-level interaction data and same-level interaction data from the received data according to the preset configuration information, and store them in corresponding storage areas respectively.

The network bridge device in the embodiment of the present invention is introduced below, referring to Fig. 3, an embodiment of the network bridge device in the embodiment of the present invention includes:

The first receiving module 301 is configured to receive data from the first network and data from the second network, the first network is the upper layer network of the bridge device, and the second network is the lower layer of the bridge device network;

The first storage module 302 is configured to save the received data;

The first extraction module 303 is configured to extract the cross-level interaction data of the first network and the same-level interaction data of the second network from the data, and extract the cross-level interaction data of the second network and the interaction data of the first network Interactive data at the same level;

The sending module 304 is configured to send the cross-level interaction data of the first network and the same-level interaction data of the second network to devices in the second network, and send the cross-level interaction data of the second network and the first The same-level interaction data of the network is sent to the device in the first network.

In this embodiment, since the cross-level interaction data received by the devices in the first network and the devices in the second network are valid data without additional data fields, the utilization rate of data segments can be improved and bandwidth waste can be reduced.

For ease of understanding, the network bridge device in the embodiment of the present invention is described in detail below, please refer to FIG. 4, another embodiment of the network bridge device in the embodiment of the present invention includes:

The first receiving module 401 is configured to receive data from a first network and data from a second network, the first network is an upper layer network of the bridge device, and the second network is a lower layer of the bridge device network;

The second extraction module 402 is configured to extract same-level interaction data and cross-level interaction data respectively from the received data;

The first storage module 403 is used to save the received data;

The first extraction module 404 is configured to extract the cross-level interaction data of the first network and the same-level interaction data of the second network from the data, and extract the cross-level interaction data of the second network and the interaction data of the first network Interactive data at the same level;

The sending module 405 is configured to send the cross-level interaction data of the first network and the same-level interaction data of the second network to devices in the second network, and send the cross-level interaction data of the second network and the first The same-level interaction data of the network is sent to the device in the first network.

Wherein the first receiving module 401 in this embodiment includes:

The first receiving unit 4011 is configured to receive data from the first network and data from the second network through preconfigured configuration information.

Wherein the first storage module 403 in this embodiment includes:

The first storage unit 4031 is configured to respectively store the above-mentioned same-level interaction data, and respectively store the above-mentioned cross-level interaction data.

Wherein the first storage unit 4031 includes:

The first storage subunit 40311 is used to respectively store the above-mentioned same-level interaction data, store the cross-level interaction data of the above-mentioned first network in an orderly manner according to the Internet Protocol IP, and store the cross-level interaction data of the above-mentioned second network in an orderly manner according to the above-mentioned IP. For hierarchical interaction data, the aforementioned IP is the IP of the device corresponding to the aforementioned cross-level interactive data.

Wherein the first extraction module 404 in this embodiment includes:

The first extraction unit 4041 is configured to extract the cross-level interaction data of the above-mentioned first network and the same-level interaction data of the above-mentioned second network from the above-mentioned data according to a preset scheduling sequence, and extract the cross-level interaction data of the above-mentioned second network Interact data with the same level of the above-mentioned first network.

In this embodiment, since the cross-level interaction data received by the devices in the first network and the devices in the second network are valid data without additional data fields, the utilization rate of data segments can be improved and bandwidth waste can be reduced.

Secondly, this embodiment uses at least four different storage areas to respectively store the same-level interaction data from the first network, the cross-level interaction data of the first network, the same-level interaction data of the second network, and the cross-level interaction data of the second network. The interactive data and the storage order of cross-level interactive data are determined by the size of the IP, which improves the selectivity of the solution.

For ease of understanding, the following describes the interaction between modules of the bridge device in this embodiment using an actual application scenario:

The first receiving unit 4011 in the first receiving module 401 receives the data from the first network through the upper layer communication port and receives the data from the second network through the lower layer communication port within the specified time slice through the preconfigured configuration information ; Wherein, the configuration information includes scheduling order information, and the configuration information refers to the configuration information that the network bridge device needs to write before working (the configuration information of each network bridge device is different, and can be calculated manually, It can also be automatically generated by software), the configuration information includes two aspects: on the one hand, the communication attribute parameters configured for the bridge device, including information such as the network address, cycle time length, and time slice length of the bridge device; The aspect is the link relationship of data, which stores the link relationship between all other devices and the bridge device, that is, which segment or segments of data in the message sent by any other device are sent to the bridge device, The bridge device extracts the required data from the received message according to the link relationship; the above-mentioned first network is an upper-layer network, and the above-mentioned second network is a lower-layer network; the upper-layer network and the lower-layer network It can be any topology, including: star topology, ring topology or line topology, and other types of topologies, which will not be described here; the clock of the next layer network is based on the clock of the upper layer network Carry out clock synchronization, and finally realize the synchronization of the entire network based on the top-level network; it should be noted that the bridge device independently participates in communication scheduling and data transmission in the first network and the second network, and completes the previous network at the same time. The clock information of the layer network is transmitted to the lower layer network, and the data interaction between the upper and lower layer networks; further, the data of the first network comes from the devices in the first network, and the devices in the first network can be one or more Similarly, the data of the second network comes from the devices in the second network, and there can be one or more devices in the second network; If it is less than three, multiple upper-layer networks and multiple lower-layer networks can be cascaded at the same time to achieve the purpose of expanding the network scale. The second extraction module 402 extracts the same-level interaction data from the upper-layer network and the lower-layer network from the received data according to the preset configuration information, and extracts the data from the upper-layer network and the lower-layer network respectively. Interact data across hierarchies. The first storage unit 4031 in the first storage module 403 respectively stores the same-level interaction data from the first network, the cross-level interaction data of the first network, the same-level interaction data of the second network, and the second The cross-level interaction data of the network, at the same time, when the first storage subunit 40311 in the first storage unit 4031 stores the cross-level interaction data of the first network, the storage order is determined by the IP size of the device corresponding to the cross-level interaction data Order, when the value of IP is smaller, the storage order is higher. Similarly, the storage order of cross-level interaction data in the second network is similar to the storage order of cross-level interaction data in the first network, and details will not be repeated here; it should be noted that other methods can also be used to determine the order of storage order, including but not limited to according to the IP size as the storage order, which is not limited here; it can be understood that the above four kinds of data can also be stored through other storage media, which is not limited here; further, the first storage unit 4031 includes at least four different storage areas. After the data is saved, the first extraction unit 4041 in the first extraction module 404 extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the stored data according to the preset scheduling order, and extracts The cross-level interaction data of the second network and the same-level interaction data of the first network. The first extracting unit 4041 extracts the cross-level interaction data of the first network and the same-level interaction data of the second network, and after extracting the cross-level interaction data of the second network and the same-level interaction data of the first network, Packet the cross-level interaction data of the first network and the cross-level interaction data of the second network, and send the cross-level interaction data of the first network and the same-level interaction data of the second network through the lower-layer communication port to the devices in the second network, and send the cross-level interaction data of the second network and the same-level interaction data of the first network to the devices in the first network through the upper communication port; it should be noted that the first network After receiving the cross-level interaction configuration and same-level interaction data, each device in the network and each device in the second network extracts the cross-level interaction data and the same-level interaction data belonging to the device, and saves them respectively.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A data transmission method of a multi-level network, characterized in that, comprising: The bridge device receives the data from the first network and the data from the second network, and saves the received data, the first network is the upper layer network of the bridge device, and the second network is the network The next-level network of the bridge device; The network bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the data, and extracts the cross-level interaction data of the second network and the first Interaction data at the same level of the network; The network bridge device sends the cross-layer interaction data of the first network and the same-layer interaction data of the second network to devices in the second network, and sends the cross-layer interaction data of the second network and the Send the same-level interaction data of the first network to devices in the first network. 2. The method according to claim 1, wherein the network bridge device receiving data from the first network and data from the second network comprises: The bridge device receives data from the first network and data from the second network through pre-configured configuration information. 3. The method according to claim 1 or 2, wherein, before the network bridge device saves the received data, the method further comprises: The network bridge device respectively extracts same-level interaction data from the received data, and respectively extracts cross-level interaction data; The storage of the received data by the bridge device includes: The network bridge device respectively stores the same-level interaction data, and separately stores the cross-level interaction data. 4. The method according to claim 3, wherein the bridge device respectively storing the cross-level interaction data comprises: The bridge device stores the cross-level interaction data of the first network in an orderly manner according to the Internet Protocol IP, and stores the cross-level interaction data of the second network in an orderly manner according to the IP; The IP is the IP of the device corresponding to the cross-level interaction data. 5. The method according to claim 4, wherein the network bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the data, and extracts The cross-level interaction data of the second network and the same-level interaction data of the first network include: The network bridge device extracts the cross-level interaction data of the first network and the same-level interaction data of the second network from the data according to a preset scheduling order, and extracts the cross-level interaction data of the second network The data and the same-level interaction data of the first network. 6. A network bridge device, characterized in that, comprising: The first receiving module is configured to receive data from a first network and data from a second network, the first network is an upper layer network of the bridge device, and the second network is an upper layer network of the bridge device next layer network; The first storage module is used to save the received data; The first extraction module is configured to extract the cross-level interaction data of the first network and the same-level interaction data of the second network from the data, and extract the cross-level interaction data of the second network and the Same-level interaction data of the first network; a sending module, configured to send the cross-layer interaction data of the first network and the same-layer interaction data of the second network to devices in the second network, and send the cross-layer interaction data of the second network and the Send the same-level interaction data of the first network to devices in the first network. 7. The network bridge device according to claim 6, wherein the first receiving module comprises: The first receiving unit is configured to receive data from the first network and data from the second network through preconfigured configuration information. 8. The bridge device according to claim 6 or 7, wherein the bridge device further comprises: The second extraction module is used to extract same-level interaction data and cross-level interaction data respectively from the received data; The first storage module includes: The first storage unit is configured to respectively store the same-level interaction data, and separately store the cross-level interaction data. 9. The network bridge device according to claim 8, wherein the first storage unit comprises: The first storage subunit is configured to separately store the same-level interaction data, store the cross-level interaction data of the first network in an orderly manner according to the Internet Protocol IP, and store the second network in an orderly manner according to the IP The cross-level interaction data of the network, the IP is the IP of the device corresponding to the cross-level interaction data. 10. The network bridge device according to claim 9, wherein the first extracting module comprises: The first extracting unit is configured to extract the cross-level interaction data of the first network and the same-level interaction data of the second network from the data according to a preset scheduling order, and extract the cross-level interaction data of the second network The level interaction data and the same level interaction data of the first network.