CN103312829A - Heterogeneous network communication method and device - Google Patents

Abstract

The invention discloses a heterogeneous network communication method and device. A gateway device pre-sets a virtual node corresponding to a node in the second network in the first network, records the corresponding relationship between the real address and the virtual address, and stores the set virtual node The information configured on the node in the first network, the information includes a virtual address, the method includes: the gateway device receives a message sent by the node in the first network, and the destination address of the message is the node in the second network The virtual address in the first network; the gateway device determines the real address corresponding to the destination address of the message according to the corresponding relationship between the real address and the virtual address of the node in the second network; the gateway device determines the real address corresponding to the destination address of the message according to the determined The real address re-encapsulates the packet according to the protocol of the second network, and forwards the packet to the second network. By adopting the invention, it can be realized that the processing of the application layer is not required in the process of data forwarding between heterogeneous networks.

Description

A heterogeneous network communication method and device

technical field

The present invention relates to the field of network technology, in particular to a heterogeneous network communication method and device.

Background technique

A sensor network is a computer network composed of many spatially distributed automatic devices that use sensors to monitor physical or environmental conditions (such as temperature, sound, vibration, pressure, motion or pollutants, etc.) at different locations.

The sensor network connects network nodes in a small space area, collects relevant information, and accepts remote control. In order to realize the data interaction with the remote server, it needs to connect with other networks through the gateway to realize remote communication. Most sensor networks use private, non-IP-based network technologies, while other networks connected to them mostly use IP-based network technologies. Therefore, as shown in Figure 1, the sensor network gateway mainly receives the messages from the two heterogeneous networks through its internal integrated sensor network communication module and other network communication modules, and analyzes the information in the message at the application layer. After the data is processed, the data is processed accordingly to obtain the destination address of the message, and then the message is encapsulated and forwarded.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

In the prior art, the sensor network gateway must parse the data in the heterogeneous network to the application layer, and the application layer implements the parsing, processing, and forwarding of the data. The packet forwarding is realized through the application layer, the processing process is too complicated and the efficiency is low. Moreover, due to the numerous sensor network applications, the logic and data formats of each application are different, and different sensor network gateways must be developed for each application. Therefore, it is difficult to standardize sensor network gateways using existing technologies.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a method and device for heterogeneous network communication, so that no application layer processing is required in the process of data forwarding. Therefore, the embodiments of the present invention adopt the following technical solutions:

A heterogeneous network communication method, the gateway device pre-sets virtual nodes corresponding to nodes in the second network in the first network, and records the corresponding relationship between the real address of the node in the second network and the virtual address in the first network , and configuring the set virtual node information on the nodes in the first network, the information includes a virtual address, the method includes:

The gateway device receives a message sent by a node in the first network, and the destination address of the message is a virtual address of a node in the second network;

The gateway device determines the real address corresponding to the destination address of the message according to the corresponding relationship between the real address and the virtual address of the node in the second network;

The gateway device re-encapsulates the message according to the protocol of the second network according to the determined real address, and forwards the message to the second network.

A gateway device, comprising:

The setting module is used to set a virtual node corresponding to a node in the second network in the first network, record the corresponding relationship between the real address of the node in the second network and the virtual address in the first network, and set the virtual node The information of the node is configured on the node in the first network;

A receiving module, configured to receive a message sent by a node in the first network, where the destination address of the message is the virtual address of the node in the second network;

A determining module, configured to determine the real address corresponding to the destination address of the message according to the corresponding relationship between the real address and the virtual address of the node in the second network;

A forwarding module, configured to repackage the message according to the protocol of the second network according to the determined real address, and forward the message to the second network.

In the above embodiment of the present invention, the gateway device receives the message sent by the node in the first network, the destination address of the message is the virtual address of the node in the second network, according to the real address and the virtual address of the node in the second network Corresponding relationship, determine the real address corresponding to the destination address of the message, and repackage the message according to the protocol of the second network according to the determined real address, and then forward the message to the second network, so as to realize In the process of data forwarding between heterogeneous networks, no application layer processing is required.

Description of drawings

FIG. 1 is a schematic diagram of the principle of a sensor network gateway in the prior art;

FIG. 2 is a schematic diagram of an initial setting process in a heterogeneous network communication method provided by an embodiment of the present invention;

FIG. 3 is one of the schematic flow diagrams of a heterogeneous network communication method provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a network architecture providing a heterogeneous network communication method according to an embodiment of the present invention;

FIG. 5 is the second schematic flow diagram of a heterogeneous network communication method provided by an embodiment of the present invention;

FIG. 6 is a third schematic flow diagram of a heterogeneous network communication method provided by an embodiment of the present invention;

FIG. 7 is a fourth schematic flowchart of a heterogeneous network communication method provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a gateway device provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

The embodiment of the present invention provides a heterogeneous network communication method, which can be applied to edge gateway devices between different networks in the heterogeneous network.

In the embodiment of the present invention, before the heterogeneous network communicates, the gateway device can pre-set a virtual node corresponding to a node in the second network in the first network, and record the real address of the node in the second network and the node in the first network. The corresponding relationship of the virtual addresses in the network, and then configure the set virtual node information on the nodes in the first network, where the information includes the virtual addresses. Wherein, the first network and the second network having different network protocols jointly constitute a heterogeneous network. In the following specific embodiments, the first network may be a sensor network, and the second network may be an IP network, or the first network It is an IP network, and the second network is a sensor network; the node here is the basic network element for communication in the network; the real address is the address of the node, and the virtual address is allocated by the gateway device to the virtual node corresponding to the node in the second network An address in the first network. As shown in FIG. 2 , the specific process of virtualization (setting virtual nodes) and recording address correspondence may include the following steps.

In step 201, the gateway device obtains information about a node in the second network that needs to communicate with the first network, and the information includes the real address of the node in the second network.

In the second network, it may be set that all nodes need to communicate with nodes in the first network, or it may be set that only some nodes need to communicate with nodes in the first network. For example, in the communication between the sensor network and the IP network, only the nodes in the IP network that process the information reported by the sensor network need to communicate with the sensor network. Therefore, the gateway device only needs to obtain the relevant information of the nodes in the second network that need to communicate with the nodes in the first network, such as address information (real address), node type information (such as statistics platform, alarm platform, etc.), node identification information, etc.

In step 202, the gateway device sets virtual nodes in the first network corresponding to the obtained nodes in the second network according to the obtained information, and assigns virtual addresses to the virtual nodes.

Specifically, the gateway device can establish a corresponding virtual node in the first network according to the acquired information of the nodes in the second network, and set related information of the virtual node, such as virtual address, node type, node function, node ID, Routing information (routing the message whose destination address is the virtual address of the virtual node to the gateway device), etc., and adding the established virtual node to the first network according to the protocol of the first network.

Further, the set virtual node information may be configured on nodes in the first network. Specifically, the information of the virtual node may be configured on the nodes in the first network through manual setting. In addition, the gateway device can notify each node in the first network (specifically, each node that needs to communicate with the second network) of the set virtual node information. The information can include the virtual address, and can also include the node Type, node function, node identifier, etc., may also include routing information of the virtual node, and the routing information may route packets whose destination address is the virtual address of the virtual node to the gateway device. The node function information of a virtual node can be sent to the virtual node when a certain type of information is generated, for example, the virtual node in the sensor network corresponding to the alarm platform in the IP network is virtual node 1, and the information in virtual node 1 Recorded in the center, when an alarm message is generated, it is sent to virtual node 1.

In step 203, the gateway device records the acquired correspondence between the real address and the virtual address of each node in the second network. Specifically, an address correspondence table may be established to record the real addresses and corresponding virtual addresses of each node.

As shown in FIG. 3, it is a schematic flowchart of a heterogeneous network communication process provided by an embodiment of the present invention, including:

In step 301, the gateway device receives a message sent by a node in the first network, and the destination address of the message is the virtual address of the node in the second network.

After the above virtual node setting process, when a node in the first network needs to send a message to a node in the second network, it will only send a message to the corresponding virtual node, and the destination address is the second network The virtual address corresponding to the middle node (this virtual address is an address under the first network protocol). The message is routed to the gateway device through the first network.

The gateway device receives the message sent by the node in the first network, and decapsulates the message according to the protocol of the first network to obtain the destination address of the message.

Step 302, the gateway device determines the real address corresponding to the destination address of the message according to the correspondence between the real address and the virtual address of the node in the second network, that is, determines the node in the second network corresponding to the target virtual node of the message (the message The real address of the actual target node) (this real address is the address under the second network protocol).

Step 303, the gateway device repackages the packet according to the determined real address according to the protocol of the second network, and forwards the packet.

Specifically, the gateway device uses the determined real address as the destination address of the message, repackages the message according to the protocol of the second network, and routes the encapsulated message to the real address through the second network, that is, the message is routed to the actual destination node where the message is sent.

In the embodiment of the present invention, the gateway device receives the message sent by the node in the first network, the destination address of the message is the virtual address of the node in the second network, according to the correspondence between the real address and the virtual address of the node in the second network relationship, determine the real address corresponding to the destination address of the message, and repackage the message according to the protocol of the second network according to the determined real address, and then forward the message to the second network, so that the No application layer processing is required during data forwarding between heterogeneous networks.

Embodiment two

The embodiment of the present invention provides a heterogeneous network communication method, which can be applied to a heterogeneous network edge gateway device.

In the embodiment of the present invention, before the heterogeneous network communicates, the gateway device can pre-set a virtual node corresponding to a node in the second network in the first network, and record the real address of the node in the second network and the node in the first network. The corresponding relationship of the virtual addresses in the network, and then configure the set virtual node information on the nodes in the first network, the information includes virtual addresses; and pre-set in the second network corresponding to the nodes in the first network Virtual node, record the corresponding relationship between the real address of the node in the first network and the virtual address in the second network, and also configure the information of the set virtual node to the node in the second network, the information includes the virtual address . A network architecture diagram composed of nodes and virtual nodes may be shown in FIG. 4 .

In the embodiment of the present invention, not only virtual nodes corresponding to nodes in the second network are set in the first network, but virtual nodes corresponding to nodes in the first network are also set in the second network. The process of setting virtual nodes corresponding to nodes in the first network in the second network is the same as the specific process of setting virtual nodes corresponding to nodes in the second network in the first network. The content is not repeated here.

As shown in FIG. 5, it is a schematic flowchart of a heterogeneous network communication process provided by an embodiment of the present invention, including:

Step 501, the gateway device receives a message sent by a node in the first network, and the destination address of the message is the virtual address of the node in the second network.

When a node in the first network needs to send a message to a node in the second network, it can use its own real address as the source address of the message and the virtual address of the target virtual node as the destination address. The protocol encapsulates the data to obtain a corresponding message, and routes the message to the gateway device through the first network.

The gateway device receives the message sent by the node in the first network, and decapsulates the message according to the protocol of the first network, and obtains the source address and destination address of the message, wherein the source address is the real address of the node in the first network. Address, where the destination address is the virtual address of the node in the second network.

Step 502, the gateway device determines the real address corresponding to the destination address of the message according to the correspondence between the real address and the virtual address of the node in the second network; and determines the corresponding relationship between the real address and the virtual address of the node in the first network A virtual address corresponding to the source address of the packet.

Step 503, the gateway device uses the virtual address of the node in the first network as the source address of the message (the address under the second network protocol), and uses the real address of the node in the second network as the destination address of the message ( address under the second network protocol), repackage the message according to the protocol of the second network, and forward the message according to the source address and the destination address.

Specifically, the gateway device re-encapsulates the data in the message according to the protocol of the second network and according to the source address and destination address, and then forwards it to the second network. Before the message is decapsulated, the source address and destination address are the real address of the node in the first network and the virtual address of the node in the second network respectively, which are addresses under the first network protocol; after re-encapsulation, the new The source address and the destination address are respectively the virtual address of the node in the first network and the real address of the node in the second network, both of which are addresses under the second network protocol.

In the embodiment of the present invention, the gateway device receives the message sent by the node in the first network, the destination address of the message is the virtual address of the node in the second network, according to the correspondence between the real address and the virtual address of the node in the second network relationship, determine the real address corresponding to the destination address of the message, and repackage the message according to the protocol of the second network according to the determined real address, and then forward the message to the second network, so that the No application layer processing is required during data forwarding between heterogeneous networks.

The first and second embodiments of the present invention just use the first network and the second network as examples to describe the heterogeneous network communication method provided by the embodiments of the present invention. It should be pointed out that, according to the above method, in a heterogeneous network composed of two or more networks, the mutual communication between any of the networks can be realized, and the communication between the networks can be on the same standardized gateway device Complete, for example, according to the method provided by the above-mentioned embodiments of the present invention, a certain gateway device can not only realize the communication between the first network and the second network, but also realize the communication between the second network and the third network, and can also realize the communication between the first network and the third network. Fourth Network Communications. On this standardized gateway device, only the corresponding virtualization of the network that needs to communicate and the process of recording the corresponding relationship between the virtual address and the real address can be carried out, and the communication of the corresponding network can be carried out.

The heterogeneous network communication method provided by the embodiment of the present invention will be further described below in combination with a specific application scenario of communication between a sensor network and an IP network.

Embodiment three

In the application of temperature sensor network, multiple sensor nodes are set in the temperature sensor network for temperature measurement, and the sensor nodes report the measured temperature to the sink node. When the sink node determines that the temperature reported by a sensor node exceeds the standard , then send an alarm to the alarm platform in the IP network (the address of the alarm platform in the IP network is address A).

The sensor network gateway (the border gateway between the sensor network and the IP network) can establish a virtual node of the alarm platform in the temperature sensing network, and set the function of this virtual node as the target node for the sensor node to report the temperature exceeding the standard. virtual address (address A'), and record the corresponding relationship between the real address (address A) and the virtual address (address A') of the alarm platform. After the virtual node is established, the sensor network gateway can notify the relevant information of the virtual node to each converging node in the temperature sensor network. The content of the notification can include: the address of the virtual node is address A', and the virtual node is The target node that gives an alarm when the temperature of the sensing node exceeds the standard, and the routing information of the virtual node (routing the message targeted at the virtual node to the sensor network gateway).

When a sink node (sink node 1) determines that the temperature reported by a sensor node received exceeds the temperature threshold, the alarm process shown in Figure 6 is performed, including:

In step 601, the aggregation node 1 sends a message carrying alarm information to address A'.

Step 602, the message is routed to the sensor network gateway through the temperature sensor network.

Step 603, the sensor network gateway receives the message, decapsulates the message, and obtains its destination address as address A'.

Step 604, the sensor network gateway determines that the real address corresponding to address A' is address A according to the corresponding relationship between the real address of the node in the IP network recorded by it and its virtual address in the temperature sensor network, that is, the address of the alarm platform in the IP network the address of.

Step 605, the sensor network gateway repackages the message carrying the alarm information according to the IP network protocol, and sends it to address A through the IP network.

Step 606, the alarm platform receives the message carrying the alarm information, and performs corresponding alarm processing. For example, send a short message alarm to a preset mobile terminal.

In the embodiment of the present invention, the gateway device receives the message sent by the node in the first network, the destination address of the message is the virtual address of the node in the second network, according to the correspondence between the real address and the virtual address of the node in the second network relationship, determine the real address corresponding to the destination address of the message, and repackage the message according to the protocol of the second network according to the determined real address, and then forward the message to the second network, so that the No application layer processing is required during data forwarding between heterogeneous networks.

Embodiment four

In the temperature sensing network, a management platform can be set in the IP network, and the administrator can control each node in the temperature sensing network through the management platform.

The sensor network gateway can establish virtual nodes of each aggregation node in the IP network, set the function of the virtual nodes as information aggregation, assign virtual addresses to these virtual nodes, and record the correspondence between the virtual addresses of the aggregation nodes and the real addresses. The sensor network gateway can also establish a virtual node of the management platform in the temperature sensor network, set the function of the virtual node as information management, assign a virtual address to the virtual node, and record the corresponding relationship between the virtual address and the real address of the management platform.

After the above-mentioned virtual nodes are established, the sensor network gateway can notify the IP network of the relevant information (including virtual addresses) of the virtual nodes of the sink node, and notify the relevant information (including virtual addresses) of the virtual nodes of the management platform to the temperature sensor network.

When the administrator needs to know the temperature information at a certain sensing node (sensing node a) through the management platform, the temperature information acquisition process as shown in Figure 7 can be performed, including:

Step 701, the management platform (the real address is address B) sends a message to the virtual node of the sink node 1 (the virtual address is address 1'), and the message carries a notification to report the temperature information of the sensor node a. The relevant information of the virtual node of the sink node notified by the sensor network gateway may include: the sink node 1 summarizes the temperature information of the sensor node a, sensor node b, and sensor node c.

Step 702, the message is routed to the sensor network gateway through the IP network.

Step 703, the sensor network gateway receives the message, and decapsulates the message to obtain the destination address as address 1' and the source address as address B.

Step 704, the sensor network gateway determines that the real address corresponding to address 1' is address 1 according to the corresponding relationship between the real address and the virtual address of the node in the recorded temperature sensor network; according to the corresponding relationship between the real address and the virtual address of the node in the IP network, It is determined that the virtual address corresponding to address B is address B'.

Step 705, the sensor network gateway uses address 1 as the destination address and address B' as the source address, repackages the message according to the sensor network protocol, and sends it to the sink node 1 through the temperature sensor network.

Step 706, after receiving the message, the aggregation node 1 obtains the temperature information of the sensor node a, and reports it to the management platform. The specific reporting process is similar to the alarming process in Embodiment 3, and will not be repeated here.

In the embodiment of the present invention, the gateway device receives the message sent by the node in the first network, the destination address of the message is the virtual address of the node in the second network, according to the correspondence between the real address and the virtual address of the node in the second network relationship, determine the real address corresponding to the destination address of the message, and repackage the message according to the protocol of the second network according to the determined real address, and then forward the message to the second network, so that the No application layer processing is required during data forwarding between heterogeneous networks.

Embodiment five

Based on the same technical concept, the embodiment of the present invention also provides a gateway device that can be used as a sensor network gateway, as shown in Figure 8, the gateway device includes:

A setting module 810, configured to set a virtual node corresponding to a node in the second network in the first network, record the corresponding relationship between the real address of the node in the second network and the virtual address in the first network, and set the The information of the virtual node is configured on the node in the first network;

A receiving module 820, configured to receive a message sent by a node in the first network, where the destination address of the message is the virtual address of the node in the second network;

A determining module 830, configured to determine the real address corresponding to the destination address of the message according to the corresponding relationship between the real address and the virtual address of the node in the second network;

The forwarding module 840 is configured to repackage the message according to the protocol of the second network according to the determined real address, and forward the message to the second network.

preferred,

The setting module 810 is further configured to set a virtual node corresponding to the node in the first network in the second network, and record the corresponding relationship between the real address of the node in the first network and the virtual address in the second network;

The determination module 830 is further configured to determine the virtual address corresponding to the source address of the message according to the correspondence between the real address and the virtual address of the node in the first network;

The forwarding module 840 is specifically configured to use the virtual address of the node in the first network as the source address of the message, and use the real address of the node in the second network as the destination address, according to the protocol of the second network Re-encapsulate the message.

Preferably, the setting module 810 is specifically used for:

Obtain information about nodes in the second network that need to communicate with the first network, the information including real addresses;

According to the obtained information, setting virtual nodes corresponding to the obtained nodes in the second network in the first network, and assigning virtual addresses to each virtual node;

Record the obtained corresponding relationship between the real address and the virtual address of each node in the second network.

Preferably, the forwarding module 840 is specifically configured to use the determined real address as the destination address of the message, and re-encapsulate the message according to the protocol of the second network.

Preferably, the first network is specifically a sensor network, and the second network is specifically an IP network; or, the first network is specifically an IP network, and the second network is specifically a sensor network.

In the embodiment of the present invention, the gateway device receives the message sent by the node in the first network, the destination address of the message is the virtual address of the node in the second network, according to the correspondence between the real address and the virtual address of the node in the second network relationship, determine the real address corresponding to the destination address of the message, and repackage the message according to the protocol of the second network according to the determined real address, and then forward the message to the second network, so that the No application layer processing is required during data forwarding between heterogeneous networks.

Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, or can be located in one or more devices different from the embodiment according to corresponding changes. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A terminal device (which may be a mobile phone, a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. A heterogeneous network communication method, characterized in that the gateway device pre-sets a virtual node corresponding to a node in the second network in the first network, and records the real address of the node in the second network and the address in the first network The corresponding relationship of the virtual address, and configure the information of the set virtual node to the node in the first network, the information includes the virtual address, the method includes: The gateway device receives a message sent by a node in the first network, and the destination address of the message is a virtual address of a node in the second network; The gateway device determines the real address corresponding to the destination address of the message according to the corresponding relationship between the real address and the virtual address of the node in the second network; The gateway device re-encapsulates the message according to the protocol of the second network according to the determined real address, and forwards the message to the second network. 2. The method according to claim 1, further comprising: the gateway device pre-sets a virtual node corresponding to a node in the first network in the second network, and records the real address of the node in the first network and the corresponding relationship of virtual addresses in the second network; After the gateway device receives the message sent by the node in the first network, it further includes: the gateway device determines the virtual address corresponding to the source address of the message according to the corresponding relationship between the real address and the virtual address of the node in the first network. address; The gateway device re-encapsulates the message according to the protocol of the second network according to the determined real address, specifically: the gateway device uses the virtual address of the node in the first network as the source address of the message, and sets The real address of the node in the second network is used as the destination address, and the packet is re-encapsulated according to the protocol of the second network. 3. The method according to claim 1, wherein the gateway device pre-sets a virtual node corresponding to a node in the second network in the first network, and records the real address of the node in the second network and the address in the second network. A corresponding relationship of virtual addresses in the network, specifically: The gateway device acquires information about nodes in the second network that need to communicate with the first network, where the information includes a real address; The gateway device sets, in the first network, virtual nodes corresponding to the obtained nodes in the second network according to the obtained information, and assigns a virtual address to each virtual node; The gateway device records the obtained corresponding relationship between the real address and the virtual address of each node in the second network. 4. The method according to claim 1, wherein the gateway device re-encapsulates the message according to the protocol of the second network according to the determined real address, specifically: The gateway device uses the determined real address as the destination address of the packet, and re-encapsulates the packet according to the protocol of the second network. 5. The method according to claim 1, wherein the first network is specifically a sensor network, and the second network is specifically an IP network; or, the first network is specifically an IP network, and the second network is specifically an IP network. The second network is specifically a sensor network. 6. A gateway device, characterized in that, comprising: The setting module is used to set a virtual node corresponding to a node in the second network in the first network, record the corresponding relationship between the real address of the node in the second network and the virtual address in the first network, and set the virtual node The information of the node is configured on the node in the first network; A receiving module, configured to receive a message sent by a node in the first network, where the destination address of the message is the virtual address of the node in the second network; A determining module, configured to determine the real address corresponding to the destination address of the message according to the corresponding relationship between the real address and the virtual address of the node in the second network; A forwarding module, configured to repackage the message according to the protocol of the second network according to the determined real address, and forward the message to the second network. 7. The gateway device according to claim 6, wherein: The setting module is also used to set a virtual node corresponding to the node in the first network in the second network, and record the corresponding relationship between the real address of the node in the first network and the virtual address in the second network; The determining module is further configured to determine the virtual address corresponding to the source address of the message according to the corresponding relationship between the real address and the virtual address of the node in the first network; The forwarding module is specifically configured to use the virtual address of the node in the first network as the source address of the message, and use the real address of the node in the second network as the destination address, and retransmit the message according to the protocol of the second network. Encapsulate the message. 8. The gateway device according to claim 6, wherein the setting module is specifically used for: Obtain information about nodes in the second network that need to communicate with the first network, the information including real addresses; According to the obtained information, setting virtual nodes corresponding to the obtained nodes in the second network in the first network, and assigning virtual addresses to each virtual node; Record the obtained corresponding relationship between the real address and the virtual address of each node in the second network. 9. The gateway device according to claim 6, wherein the forwarding module is specifically configured to use the determined real address as the destination address of the message, and re-encapsulate the message according to the protocol of the second network arts. 10. The gateway device according to claim 6, wherein the first network is specifically a sensor network, and the second network is specifically an IP network; or, the first network is specifically an IP network, and the The second network is specifically a sensor network.

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