CN117749569A - Communication method, device, equipment, system and storage medium - Google Patents

Abstract

The application provides a communication method, a device, equipment, a system and a storage medium. The communication system includes: the system comprises a WLAN access point, a WLAN interworking network element, at least one connecting device and a user plane network element; the connecting equipment comprises a lower hanging interface and a WIFI interface, the connecting equipment is hung with at least one terminal through the lower hanging interface, the connecting equipment is connected with a WLAN access point through the WIFI interface, and the lower hanging interface and the WIFI interface are located in the same network bridge, and the method comprises the following steps: after receiving a first ethernet packet carrying a MAC address of a DN server sent by a terminal, a connection device may encapsulate the first ethernet packet to obtain a packet including: a first vxlan message of the IP address of the user plane network element; and then, the first Ethernet data packet is transmitted to the WLAN interworking network element through the WLAN access point, so that the WLAN interworking network element transmits the first Ethernet data packet to the DN server through the user plane network element. The method can realize two-layer data transmission.

Description

Communication methods, devices, equipment, systems and storage media

Technical field

The present application relates to the field of communication, and in particular, to a communication method, device, equipment, system and storage medium.

Background technique

With the mature commercialization of the fifth generation mobile communication technology (5G) around the world and the exploration of digitalization in the industry, 5G is accelerating its deep integration with various industries such as industry, transportation, and medical care. 5G and wireless communication technology ( The main application fields and scenarios of Wireless Fidelity (WIFI) networks have different focuses. The two technologies work together to form a converged network with complementary advantages, which can provide multi-level business coverage in the coverage area.

The 3rd Generation Partnership Project (3GPP) standard defines a 5G+WIFI integrated communication system based on the Trusted Wireless LAN (Trusted WLAN Access Network, TWAN) architecture. Currently, the 5G+WIFI integrated communication system based on TWAN architecture supports three-layer data transmission and is not suitable for terminals with two-layer data transmission requirements.

Contents of the invention

This application provides a communication method, device, equipment, system and storage medium to solve the technical problem that the existing 5G+WIFI integrated communication system does not support the second-layer data transmission requirements of the terminal.

In a first aspect, this application provides a communication method. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the The connection device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the method includes :

The connection device receives the first Ethernet data packet sent by the terminal, and the header of the first Ethernet data packet includes: the MAC address of the DN server;

The connection device encapsulates the first Ethernet data packet to obtain a first vxlan message; the message header of the first vxlan message includes: the IP address of the user plane network element;

The connection device transparently transmits the first vxlan message to the WLAN interworking network element through the WLAN access point, so that the WLAN interworking network element sends the first Ethernet data packet through the user plane network element. to the DN server.

Optionally, the method also includes:

The connection device obtains the IP address assigned by the core network control plane network element;

And, the connection device establishes a vxlan tunnel with the user plane network element.

Optionally, the first Ethernet data packet further includes the MAC address of the terminal; the message header of the first vxlan message further includes: the IP address of the connecting device.

Optionally, the method also includes:

The connection device receives the second vxlan message transparently transmitted by the WLAN interworking network element through the WLAN access point; the second vxlan message is obtained by decapsulating the second GTPU message by the WLAN interworking network element, The second GTPU message is obtained by encapsulating a second vxlan message by the user plane network element, and the second vxlan message is a second Ethernet message sent by the user plane network element to the DN server. The data packet is encapsulated; the header of the second Ethernet data packet includes: the MAC address of the terminal, and the MAC address of the DN server; the header of the second vxlan message includes: The IP address of the connected device and the IP address of the user plane network element;

The connection device decapsulates the second vxlan message to obtain the second Ethernet data packet;

The connection device sends the second Ethernet data packet to the terminal according to the MAC address of the terminal carried in the second Ethernet data packet.

In a second aspect, this application provides a communication method. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the The connection device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the method includes :

The WLAN interworking network element receives the first vxlan message transparently transmitted by the connecting device through the WLAN access point; the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device. , the message header of the first vxlan message includes: the IP address of the user plane network element, and the header of the first Ethernet data packet includes: the MAC address of the DN server;

The WLAN interworking network element encapsulates the first vxlan message to obtain a first GTPU message;

The WLAN interworking network element sends the first GTPU message to the user plane network element according to the IP address of the user plane network element carried in the first vxlan message, so that the user plane network element The element sends the first Ethernet data packet to the DN server.

Optionally, the method also includes:

The WLAN interworking network element establishes a GTPU tunnel with the user plane network element.

Optionally, the first Ethernet data packet also includes the MAC address of the terminal; the message header of the first vxlan message also includes: the IP address of the connecting device.

Optionally, the method also includes:

The WLAN interworking network element receives the second GTPU message sent by the user plane network element; the second GTPU message is obtained by encapsulating the second vxlan message by the user plane network element, and the second GTPU message is obtained by encapsulating the second vxlan message by the user plane network element. The vxlan message is obtained by the user plane network element encapsulating the second Ethernet data packet sent by the DN server; the header of the second Ethernet data packet includes: the MAC address of the terminal, and, The MAC address of the DN server; the message header of the second vxlan message includes: the IP address of the connecting device, and the IP address of the user plane network element;

The WLAN interworking network element decapsulates the second GTPU message to obtain the second vxlan message;

The WLAN interworking network element transparently transmits the second vxlan message to the connecting device through the WLAN access point according to the IP address of the connecting device carried in the second vxlan message, so that the connection The device sends the second Ethernet data packet to the terminal.

In a third aspect, this application provides a communication method. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the The connection device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the method includes :

The user plane network element receives the first GTPU message sent by the WLAN interworking network element; the first GTPU message is the WLAN interworking network element's processing of the first vxlan message sent by the connecting device. The first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device. The message header of the first vxlan message includes: the IP of the user plane network element. Address, the header of the first Ethernet data packet includes: the MAC address of the DN server;

The user plane network element decapsulates the first GTPU message to obtain the first vxlan message;

The user plane network element decapsulates the first vxlan message to obtain the first Ethernet data packet;

The user plane network element sends the first Ethernet data packet to the DN server according to the MAC address of the DN server.

Optionally, the method also includes:

The user plane network element establishes a vxlan tunnel with the connection device;

And, the user plane network element establishes a GTPU tunnel with the WLAN interworking network element.

Optionally, the first Ethernet data packet also includes the MAC address of the terminal; the message header of the first vxlan message also includes: the IP address of the connecting device;

The method also includes:

The user plane network element constructs the vxlan tunnel information table. The vxlan tunnel information table includes: the MAC address of the terminal, the identifier of the vxlan tunnel, the IP address of the connecting device, and the user plane Mapping relationship between IP addresses of network elements.

Optionally, the method also includes:

The user plane network element receives the second Ethernet data packet from the DN server; the header of the second Ethernet data packet includes: the MAC address of the terminal, and the MAC address of the DN server;

The user plane network element encapsulates the second Ethernet data packet based on the vxlan tunnel information table to obtain a second vxlan message; the message header of the second vxlan message includes: IP address, and the IP address of the user plane network element;

The user plane network element encapsulates the second vxlan message to obtain a second GTPU message;

The user plane network element sends the second GTPU message to the WLAN interworking network element.

Optionally, the user plane network element encapsulates the second Ethernet data packet based on the vxlan tunnel information table, and before obtaining the second vxlan message, it also includes:

The user plane network element determines whether to forward the second Ethernet data packet through the Layer 2 service data forwarding process according to the vxlan tunnel information table and the MAC address of the terminal;

The user plane network element encapsulates the second Ethernet data packet to obtain a second vxlan message, including:

When the user plane network element determines to forward the second Ethernet data packet through the Layer 2 service data forwarding process, it encapsulates the second Ethernet data packet to obtain a second vxlan message.

Optionally, the method also includes:

When the user plane network element determines not to send the second Ethernet data packet through the vxlan tunnel, it performs forwarding processing through the Layer 3 service data forwarding process.

In a fourth aspect, this application provides a communication device. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the The connection device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the device uses In the connection device, the device includes:

A receiving module, configured to receive the first Ethernet data packet sent by the terminal, where the header of the first Ethernet data packet includes: the MAC address of the DN server;

An encapsulation module, used to encapsulate the first Ethernet data packet to obtain a first vxlan message; the message header of the first vxlan message includes: the IP address of the user plane network element;

A sending module, configured to transparently transmit the first vxlan message to the WLAN interworking network element through the WLAN access point, so that the WLAN interworking network element transmits the first Ethernet data packet through the user plane network element. Sent to the DN server.

In a fifth aspect, this application provides a communication device. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the The connection device is connected to at least one terminal through the drop-down interface. The connection device is connected to the WLAN access point through the WIFI interface. The drop-down interface and the WIFI interface are located on the same network bridge. The device includes :

A receiving module, configured to receive the first vxlan message transparently transmitted by the connecting device through the WLAN access point; the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device. , the message header of the first vxlan message includes: the IP address of the user plane network element, and the header of the first Ethernet data packet includes: the MAC address of the DN server;

An encapsulation module, used to encapsulate the first vxlan message to obtain the first GTPU message;

A sending module, configured to send the first GTPU message to the user plane network element according to the IP address of the user plane network element carried in the first vxlan message, so that the user plane network element Send the first Ethernet data packet to the DN server.

In a sixth aspect, the present application provides a communication device. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the The connection device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the device uses For the user plane network element, the method includes:

A receiving module, configured to receive the first GTPU message sent by the WLAN interworking network element; the first GTPU message is used by the WLAN interworking network element to encapsulate the first vxlan message sent by the connecting device. It is obtained that the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device, and the message header of the first vxlan message includes: the IP address of the user plane network element , the header of the first Ethernet data packet includes: the MAC address of the DN server;

A first decapsulation module, configured to decapsulate the first GTPU message to obtain the first vxlan message;

a second decapsulation module, configured to decapsulate the first vxlan message to obtain the first Ethernet data packet;

A sending module, configured to send the first Ethernet data packet to the DN server according to the MAC address of the DN server.

In a seventh aspect, this application provides a communication device, including: a processor, and a memory communicatively connected to the processor;

The memory stores computer execution instructions;

The processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of the first to third aspects.

In an eighth aspect, this application provides a communication system. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, The connection device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through a WIFI interface, and the drop-in interface and the WIFI interface are located on the same network bridge;

The connection device is used to perform the method according to any one of the first aspects;

The WLAN interworking network element is used to perform the method described in any one of the second aspects;

The user plane network element is configured to perform the method described in any one of the third aspects.

In a ninth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores computer-executable instructions. When executed by a processor, the computer-executable instructions are used to implement the first to third aspects. any of the methods described.

In a tenth aspect, the present application provides a computer program product, including a computer program that implements the method described in any one of the first to third aspects when executed by a processor.

The communication methods, devices, equipment, systems and storage media provided by this application are based on the network architecture of the existing 5G+WIFI integrated communication system and introduce connection equipment capable of hooking up to layer 2 terminals. In addition, on the user side network A layer 2 interface is added to the element for processing layer 2 data from the DN server, and a vxlan interface is used to establish a vxlan tunnel between the CPE and the UPF network element to realize the transmission of Ethernet data from the layer 2 terminal. need.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Figure 1 is a schematic diagram of the network architecture of a 5G+WIFI integrated communication system;

Figure 2 is a schematic diagram of data forwarding;

Figure 3 is a schematic diagram of a possible user plane protocol stack;

Figure 4 is a schematic architectural diagram of a communication system provided by an embodiment of the present application;

Figure 5 is a schematic diagram of the vxlan message format;

Figure 6 is a schematic flow chart of a communication method provided by an embodiment of the present application;

Figure 7 is a schematic flow chart of another communication method provided by an embodiment of the present application;

Figure 8 is a schematic structural diagram of a first communication device provided by an embodiment of the present application;

Figure 9 is a schematic structural diagram of a second communication device provided by an embodiment of the present application;

Figure 10 is a schematic structural diagram of a third communication device provided by an embodiment of the present application;

Figure 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Through the above-mentioned drawings, clear embodiments of the present application have been shown, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present application's concepts in any way, but are intended to illustrate the application's concepts for those skilled in the art with reference to specific embodiments.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the appended claims.

Currently, some 5G+WIFI integrated communication systems require WIFI terminals (that is, terminals accessed through WIFI) to have non-access stratum (NAS) session functions, but many current WIFI terminals do not have this capability. Therefore, a 5G+WIFI integrated communication system that can be accessed without the NAS session function is proposed.

The above-mentioned WIFI terminals that do not need to have the NAS session function are called non-5G-Capable over WLAN (N5CW) terminals with no 5G access capability.

Figure 1 is a schematic diagram of the network architecture of a 5G+WIFI integrated communication system. As shown in Figure 1, the communication system may include: access network equipment, user plane function (UPF) network elements, access and mobility management function (AMF) network elements, session Management function (session management function, SMF) network element.

Access network equipment may include: Trusted WLAN Access Point (TWAP) network elements and Trusted WLAN Interworking Function (TWIF) network elements. These two network elements form a TWAN.

UPF network elements, AMF network elements, and SMF network elements are devices in the 5G core network. These devices constitute the 5G core network.

UPF network elements are used to transmit user plane data. The AMF network element is used to manage whether N5CW terminals can access the network. The SMF network element is used to manage the session connections established by N5CW terminals through the network. Each session connection is used to transmit user plane data of the N5CW terminal.

Access network equipment is used to connect N5CW terminals to the 5G core network. Among them, TWAP network elements are used for wireless access of multiple users within a certain range. The TWIF network element is used to send, receive, and process the Remote Authentication Dial-In User Service (Radius) messages between TWAP and TWAP for authentication and authorization of devices and users accessing the 5G network, and to process the dynamic host configuration protocol transparently transmitted by TWAP. (Dynamic Host Configuration Protocol, DHCP) messages, handle user registration and session-related processes, and process the Stream Control Transmission Protocol (SCTP), NAS, and 5G Network Access Control Protocol (Next) between AMF network elements. Generation Access Protocol, NGAP) and other messages communicate with UPF network elements using General Packet Radio Service (GPRS) user plane tunneling protocol (GPRS Tunneling Protocol for the user plane, GTPU).

Figure 2 is a schematic diagram of data forwarding. As shown in Figure 2, under the architecture shown in Figure 1, TWAN can aggregate N5CW terminals that use unlicensed WIFI frequency bands. After the N5CW terminal successfully accesses the 5G core network, it passes through the TWAP network element , TWIF network element, and UPF network element finally realize the transmission of business data with the server in the Data Network (DN).

The following is an introduction to how N5CW terminals use this network to achieve three-layer data transmission.

In order to facilitate understanding, the third layer and the second layer are introduced below.

The third layer is the network layer. Layer 3 communication is also called network layer communication. The protocol used is Layer 3 protocol, mainly Internet Protocol (IP), and IP addresses are used for addressing. Layer 3 data transmission is mainly used in communication scenarios across different networks, such as the Internet or Wide Area Network (WAN). In some embodiments, Layer 3 data transmission may also be called L3 data transmission, or Layer 3 data transmission.

The second layer is the data link layer. Layer 2 communication is also called data link layer communication. The protocol used is the Layer 2 protocol, mainly the Ethernet protocol, and the media access control address (Media Access Control Address, MAC address) is used for addressing. Layer 2 data transmission is mainly used in communication scenarios within local networks, such as communication within a local area network (LAN) or data center. In some embodiments, Layer 2 data transmission may also be called L2 data transmission or Layer 2 data transmission.

The terminal equipment under the TWAN architecture is N5CW equipment.

The TWIF network element is the gateway for N5CW terminals to access the 5G core network. It has a Yw interface with the TWAP network element. It supports sending and receiving Radius messages between TWAP and TWAP, processes DHCP messages transparently transmitted from the TWAP network element, and processes user registration and sessions. and other related processes.

The N1 and N2 interfaces between the TWIF network element and the AMF network element process SCTP, NAS, NGAP and other messages between the TWIF network element and the AMF network element.

The N3 interface is between the TWIF network element and the UPF network element.

Figure 3 is a schematic diagram of a possible user plane protocol stack. As shown in Figure 3, the N3 port mainly processes service messages between TWIF network elements and UPF network elements. The protocol used is the GTPU protocol, and the UPF network element executes the processing of GTPU messages. Encapsulation and de-encapsulation work.

The TWAP network element is a trusted wireless access node and the access point for N5CW terminals to enter the 5G network, achieving wireless access for multiple users within a certain range.

The N5CW terminal successfully connected to the 5G core network. The N5CW terminal finally transmitted services to the DN server through the TWAP network element, TWIF network element, and UPF network element.

However, there are still some terminals that need to use Layer 2 protocols for service transmission, that is, Layer 2 data transmission. For example, embedded WIFI devices and Ethernet devices such as industrial cameras and sensors at industrial sites. For ease of distinction, terminals that require Layer 2 protocols for service transmission are called Layer 2 terminals.

However, the communication system shown in Figure 1 above, as well as currently existing communication systems that require WIFI terminals to have NAS session functions, do not support Layer 2 data transmission. Therefore, how to realize the data transmission requirements of layer 2 terminals is an issue that needs to be solved urgently.

In order to facilitate understanding, the vxlan technology is introduced below.

Virtual eXtensible Local Area Network (vxlan) technology is essentially a tunneling technology. By establishing a logical tunnel on the IP network, the sender's message can be forwarded to the destination through the tunnel after specific encapsulation. receiver. Therefore, with vxlan, an L2 layer network can be created on top of the L3 layer infrastructure to realize L2 data transmission.

In view of this, embodiments of the present application provide a new communication system architecture to solve the above problems.

Figure 4 is a schematic architectural diagram of a communication system provided by an embodiment of the present application. As shown in Figure 4, the communication system includes: a Wireless Local Area Network (WLAN) access point, a WLAN interworking network element, at least one connecting device, and a user plane network element.

The WLAN access point may be, for example, the aforementioned TWAP network element, and the WLAN interworking network element may be, for example, the aforementioned TWIF network element. The WLAN access point and the WLAN interoperating network element constitute a TWAN. The user plane network element may be a UPF network element, for example.

That is, compared with the communication system shown in Figure 1, this application introduces connection devices based on the above architecture. The above-mentioned connection device may be, for example, any device capable of connecting a terminal to a WLAN, such as customer premises equipment (Customer Premise Equipment, CPE). One or more connection devices can be deployed in a communication system, and each connection device can be connected to one or more terminals.

For ease of explanation, the following embodiments are all described by taking the connection device as CPE, the above-mentioned WLAN access point as TWAP network element, the above-mentioned WLAN intercommunication network element as TWIF network element, and the user plane network element as UPF network element as an example.

For example, the above-mentioned CPE may include a drop-down interface and a WIFI interface. The CPE is connected to at least one terminal through the drop-down interface. The CPE is connected to the above-mentioned WLAN access point through the WIFI interface. The drop-down interface and the WIFI interface are located on the same network bridge. Enables terminals to be connected to WLAN. For example, the interface of the terminal connected to each CPE and the WIFI interface are bound to the same network bridge through the bridge configuration function of each CPE's operating system. Subsequently, the Layer 2 data packets of the terminal connected to the CPE can be directed to the WIFI interface on the CPE through the network bridge. In the embodiment of this application, the CPE is equivalent to the N5CW terminal in the TWAN architecture for the TWAP network element.

In addition, this application adds a layer 2 interface and a virtual extended local area network (VisualeXtensible Local Area Network, vxlan) interface to the UPF network element. Among them, the Layer 2 interface is used to process Layer 2 data from the DN server. The vxlan interface added to the UPF network element is used to establish a vxlan tunnel between the CPE and the UPF network element. The vxlan interface may be pre-configured with an IP address, which may be ip0, for example.

Optionally, the UPF network element may also include a Layer 3 interface, which is used to implement Layer 3 data transmission. In this way, UPF network elements can realize Layer 2 data transmission on the basis of Layer 3 data transmission.

It should be understood that the above-mentioned Figure 4 is only an example of the network elements used by the communication system to implement the method of the embodiment of the present application. It does not matter whether other network elements are included in the communication system and whether it has other communication functions. Make limitations. For example, the communication system may also include AMF network elements and SMF network elements.

In addition, the methods in the embodiments of this application can be applied to 5G communication systems, other communication systems, or future communication systems, etc., without limitation. The following embodiments take the 5G communication system as an example for description.

Before using the communication system shown in Figure 4 for Layer 2 data transmission, you can first perform the following process:

(1) For example, the CPE can adopt the registration process in the 5G communication system, register into the 5G core network through TWAN and 5G Core Control plane (5GC CP), and establish a protocol data unit (Protocol Data Unit) with 5GC through TWAN. , PDU) session.

(2) The network elements of the 5G core network (such as SMF network elements or UPF network elements, etc.) can allocate IP addresses to the WIFI interfaces of each CPE. For example: Taking the IP address of the vxlan interface of UPF as ip0 as an example, the IP address of the WIFI interface of CPE1 can be ip1, the IP address of the WIFI interface of CPE2 can be ip2, and so on, the IP address of the WIFI interface of CPEn can be ipn.

(3) A GTPU tunnel is established between the TWIF network element and the UPF network element.

(4) The CPE establishes a vxlan tunnel with the UPF network element. The vxlan tunnel corresponds to a vxlan network identifier (VXLAN Network Identifier, VNI) as the identifier of the vxlan tunnel. This vxlan tunnel is used to transmit vxlan packets.

Figure 5 is a schematic diagram of the vxlan message format. As shown in Figure 5, the message header of the vxlan message includes: vxlan header field, User Datagram Protocol (UDP) header field, External IP header field (Outer IP header), and External Ethernet header field.

Corresponding to this embodiment, the external IP header field of the vxlan message header carries the source IP address (Source IP Address, IP SA) and destination IP address (Destination Address IP, IP DA) of the local end of the vxlan tunnel. That is (IP SA, IP DA).

The concept that the local end is the sending end and the remote end is the receiving end. Taking CPE1 as the sender and the UPF network element as the receiver as an example, the external IP header field of the vxlan message header includes (ip1, ip0). Taking the UPF network element as the sender and CPE1 as the receiver as an example, the external IP header field of the vxlan message header is (ip0, ip1).

Through the above operations, subsequent Layer 2 terminals can realize Layer 2 service data transmission through the communication system.

The technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

Figure 6 is a schematic flowchart of a communication method provided by an embodiment of the present application. As shown in Figure 6, the method may include the following steps:

S601. The terminal sends the first Ethernet data packet to the CPE.

Correspondingly, the CPE receives the first Ethernet data packet, wherein the packet header of the first Ethernet data packet includes: the MAC address of the terminal and the MAC address of the DN server.

The CPE mentioned here can be any CPE under the communication system architecture shown in Figure 2. Taking CPEm as an example, assuming that its connected terminal k has uplink Layer 2 service data that needs to be transmitted, terminal k can transmit the Ethernet data packet containing the service data to CPEm through the connected interface of CPEm. The Ethernet data packet is an Ethernet data packet addressed by a MAC address, including the terminal's MAC address macmk and the DN server's MAC address macdn.

S602. The CPE encapsulates the first Ethernet data packet and obtains the first vxlan message.

Among them, the message header of the first vxlan message includes: the IP address of the CPE and the IP address of the UPF network element.

In the vxlan message format shown in Figure 5, the external IP header field of the first vxlan message carries the IP address, and the first Ethernet data packet is located in the original message.

S603. The CPE transparently transmits the first vxlan message to the TWIF network element through the TWAP network element.

Correspondingly, the TWIF network element receives the first vxlan message.

The CPE sends the first vxlan message to the TWAP network element, and the TWAP network element directly forwards the received first vxlan message to the TWIF network element without processing the first vxlan message.

Continuing to refer to the previous example, in this example, CPEm encapsulates the Layer 2 data of terminal k with vxlan, transmits it through the vxlan tunnel, and transparently transmits it to the TWIF network element through the TWAP network element. The encapsulated external IP header fields include (ipm, ip0) .

S604, the TWIF network element encapsulates the first vxlan message to obtain the first GTPU message.

As mentioned above, a GTPU tunnel is constructed between the TWIF network element and the UPF network element. Therefore, the first vxlan message can be encapsulated into the first GTPU message to forward the message through the GTPU tunnel.

S605. The TWIF network element sends the first GTPU message to the UPF network element according to the IP address of the user plane network element carried in the first vxlan message.

For example, TWIF is transmitted to UPF through the N3 port. Correspondingly, the UPF network element receives the first GTPU message.

S606. The UPF network element decapsulates the first GTPU message and obtains the first vxlan message.

As mentioned above, there is a vxlan interface inside the UPF network element. Therefore, the first GTPU message can be decapsulated into the first vxlan message and sent to the vxlan interface of the UPF network element.

S607. The UPF network element decapsulates the first vxlan message and obtains the first Ethernet data packet.

As mentioned before, the first Ethernet packet is located in the original message of the first vxlan message. Therefore, the UPF network element can decapsulate the first vxlan message through its vxlan interface to obtain the first Ethernet data packet. The first Ethernet data packet contains the MAC address of the DN server. Therefore, when the first Ethernet data packet is obtained, the MAC address of the DN server can be obtained.

S608. The UPF network element sends the first Ethernet data packet to the DN server according to the MAC address of the DN server.

For example, the UPF network element transmits data to the DN server through the N6 port. Correspondingly, the DN server receives the first Ethernet data packet.

At this point, the interaction of the terminal sending Ethernet data to the DN server is completed.

The method of the embodiment of this application is based on the network architecture of the existing 5G+WIFI integrated communication system, and introduces a connection device that can be connected to a second-layer terminal. In addition, a user plane network element is added for processing. A Layer 2 interface for Layer 2 data from the DN server, and a vxlan interface used to establish a vxlan tunnel between the CPE and the UPF network element to meet the Ethernet data transmission requirements of the Layer 2 terminal.

Therefore, the UPF network element can also build a vxlan tunnel information table between it and the terminal based on the first vxlan message to bind the terminal to the tunnel, so that the UPF network element can correctly receive the Ethernet data returned by the DN server. transmitted to the corresponding terminal.

The vxlan tunnel information table may include: the mapping relationship between the MAC address of the terminal, the identifier of the vxlan tunnel, the IP address of the CPE, and the IP address of the UPF network element. For example, it can be shown in Table 1 below:

Table 1

Terminal MAC VNI External IP header macmk mk ipm,ip0

The following describes how to forward the Ethernet data of the DN server to the terminal, that is, the process of the DN server returning the Ethernet data to the terminal.

Figure 7 is a schematic flowchart of another communication method provided by an embodiment of the present application. As shown in Figure 7, the method may include the following steps:

S701. The DN server sends the second Ethernet data packet to the UPF network element.

For example, the DN server transmits data to the UPF network element through the N6 port. Correspondingly, the UPF network element receives the second Ethernet data packet. The header of the second Ethernet data packet includes: the MAC address of the terminal, and the MAC address of the DN server.

The terminal mentioned here can be any terminal connected to any CPE under the communication system architecture shown in Figure 2. Taking CPEm and its connected terminal k as an example, when the DN server has downlink Layer 2 service data that needs to be transmitted to CPEm's connected terminal k, the Ethernet data packet contains the terminal's MAC address macmk.

S702. The UPF network element encapsulates the second Ethernet data packet based on the vxlan tunnel information table to obtain the second vxlan message.

As mentioned before, the UPF network element records the terminal MAC address in the vxlan tunnel information table and binds it to the vxlan tunnel. The UPF network element confirms the vxlan tunnel that the Layer 2 service data sent to the terminal should go through according to the entries recorded in Table 1. The vxlan interface of the UPF network element can vxlan encapsulate the second Ethernet data packet to obtain the second vxlan message.

The message header of the second vxlan message includes: the IP address of the CPE and the IP address of the UPF network element.

Referring to the foregoing example, in this example, when the DN server sends downlink Layer 2 service data to the downstream terminal k of CPEm, the encapsulated external IP header includes (ip0, ipm).

S703. The UPF network element encapsulates the second vxlan message to obtain the second GTPU message.

As mentioned above, a GTPU tunnel is constructed between the TWIF network element and the UPF network element. Therefore, the second vxlan message can be encapsulated into a second GTPU message to forward the message through the GTPU tunnel.

S704. The UPF network element sends the second GTPU message to the TWIF network element according to the IP address of the CPE carried in the second vxlan message.

For example, the UPF network element transmits data to the TWIF network element through the N3 port. Correspondingly, the TWIF network element receives the second GTPU message.

S705. The TWIF network element decapsulates the second GTPU message and obtains the second vxlan message.

As mentioned above, the message header of the second vxlan message includes: the IP address of the CPE.

S706. The TWIF network element transparently transmits the second vxlan message to the CPE through the TWAP network element according to the IP address of the CPE carried in the second vxlan message.

Correspondingly, the CPE receives the second vxlan message.

For example, the TWIF network element sends the second vxlan message to the TWAP network element, and the TWAP network element can directly forward the received second vxlan message to the CPE without processing the second vxlan message.

S707. The CPE decapsulates the second vxlan message and obtains the second Ethernet data packet.

As mentioned above, the header of the second Ethernet data packet includes: the MAC address of the terminal.

S708. The CPE sends the second Ethernet data packet to the terminal according to the MAC address of the terminal carried in the second Ethernet data packet.

Correspondingly, the terminal receives the second Ethernet data packet.

At this point, the interaction of the DN server sending Ethernet data to the terminal is completed.

The above embodiment is applicable to scenarios where the communication system only supports Layer 2 data transmission. For communication systems that support both Layer 2 data transmission and Layer 3 data, after receiving the second Ethernet data packet, the UPF network element can also First, determine whether to forward the second Ethernet data packet through the Layer 2 service data forwarding process. For example, the UPF network element can determine based on the interface on which the data packet is received. That is, the UPF network element uses different N6 interfaces for receiving Layer 3 service data transmission and Layer 2 service data transmission. Therefore, it can be judged through this interface.

When the UPF network element determines to forward the second Ethernet data packet through the Layer 2 service data forwarding process, it may use the process of the above embodiment to encapsulate and forward the second Ethernet data packet.

When the UPF network element determines not to send the second Ethernet data packet through the vxlan tunnel, it indicates that the service data is Layer 3 service data. Therefore, it can be forwarded through the existing Layer 3 service data forwarding process and does not do this. Repeat. In this way, the communication system can be improved on the basis of the existing communication system that supports three-layer service data transmission, so that it supports both three-layer service data transmission and two-layer service data transmission, which facilitates the implementation and implementation of the solution. Use also improves the reusability of existing communication systems.

The above is the description of the method embodiments of the present application, and the device provided by the embodiments of the present application will be described below.

Figure 8 is a schematic structural diagram of a first communication device provided by an embodiment of the present application. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the connecting device is connected to at least one terminal through the drop-in interface. The WIFI interface is connected to the WLAN access point, and the downstream interface and the WIFI interface are located on the same network bridge.

As shown in FIG. 8 , the device is applied to connecting equipment. The device may include, for example: a receiving module 801 , a packaging module 802 , and a sending module 803 . Optionally, the device may also include at least one of the following modules: an acquisition module 804, a construction module 805, and a decapsulation module 806.

The receiving module 801 is used to receive the first Ethernet data packet sent by the terminal. The header of the first Ethernet data packet includes: the MAC address of the DN server;

The encapsulation module 802 is used to encapsulate the first Ethernet data packet to obtain the first vxlan message; the message header of the first vxlan message includes: the IP address of the user plane network element;

The sending module 803 is used to transparently transmit the first vxlan message to the WLAN interworking network element through the WLAN access point, so that the WLAN interworking network element sends the first Ethernet data packet to the DN server through the user plane network element.

One possible implementation method is the acquisition module 804, which is used to acquire the IP address assigned by the core network control plane element;

And, building module 805 is used to establish a vxlan tunnel with the user plane network element.

In a possible implementation manner, the first Ethernet data packet also includes the MAC address of the terminal; the message header of the first vxlan message also includes: the IP address of the connected device.

In one possible implementation, the receiving module 801 is also used to receive the second vxlan message transparently transmitted by the WLAN interworking network element through the WLAN access point; the second vxlan message is the interpretation of the second GTPU message by the WLAN interworking network element. The second GTPU message is obtained by the user plane network element encapsulating the second vxlan message. The second vxlan message is obtained by the user plane network element encapsulating the second Ethernet data packet sent by the DN server. ; The header of the second Ethernet data packet includes: the MAC address of the terminal, and the MAC address of the DN server; the header of the second vxlan message includes: the IP address of the connecting device, and the IP address of the user plane network element ;

The decapsulation module 806 is used to decapsulate the second vxlan message to obtain the second Ethernet data packet;

The sending module 803 is also used for the connecting device to send the second Ethernet data packet to the terminal according to the MAC address of the terminal carried in the second Ethernet data packet.

The device provided by the embodiment of the present application can perform the action of connecting the device using the CPE device as an example in the above method embodiment. Its implementation principles and technical effects are similar and will not be described again here.

Figure 9 is a schematic structural diagram of a second communication device provided by an embodiment of the present application. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the connecting device is connected to at least one terminal through the drop-in interface. The WIFI interface is connected to the WLAN access point, and the downstream interface and the WIFI interface are located on the same network bridge.

As shown in Figure 9, the device is applied to WLAN interworking network elements. The device may include, for example: a receiving module 901, an encapsulating module 902, and a sending module 903. Optionally, the device may also include at least one of the following modules: a building module 904 and a decapsulating module 905 .

The receiving module 901 is used to receive the first vxlan message transparently transmitted by the connecting device through the WLAN access point; the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device. The first vxlan message The header of the packet includes: the IP address of the user plane network element; the header of the first Ethernet data packet includes: the MAC address of the DN server.

The encapsulation module 902 is used to encapsulate the first vxlan message to obtain the first GTPU message.

The sending module 903 is configured to send the first GTPU message to the user plane network element according to the IP address of the user plane network element carried in the first vxlan message, so that the user plane network element sends the first Ethernet data packet to DN server.

One possible implementation, building module 904, is used to establish a GTPU tunnel with the user plane network element.

In a possible implementation manner, the first Ethernet data packet also includes the MAC address of the terminal; the message header of the first vxlan message also includes: the IP address of the connected device.

In one possible implementation, the receiving module 901 is also used to receive the second GTPU message sent by the user plane network element; the second GTPU message is obtained by encapsulating the second vxlan message by the user plane network element. The vxlan message is obtained by the user plane network element encapsulating the second Ethernet data packet sent by the DN server; the header of the second Ethernet data packet includes: the MAC address of the terminal and the MAC address of the DN server; the second vxlan message The message header of the message includes: the IP address of the connected device and the IP address of the user plane network element.

The decapsulation module 905 is used to decapsulate the second GTPU message to obtain the second vxlan message.

The sending module 903 is also used for the WLAN interworking network element to transparently transmit the second vxlan message to the connecting device through the WLAN access point according to the IP address of the connecting device carried in the second vxlan message, so that the connecting device transmits the second Ethernet Network data packets are sent to the terminal.

The device provided by the embodiment of the present application can perform the actions of the WLAN interworking network element using the TWIF network element as an example in the above method embodiment. Its implementation principles and technical effects are similar and will not be described again here.

Figure 10 is a schematic structural diagram of a third communication device provided by an embodiment of the present application. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the connecting device is connected to at least one terminal through the drop-in interface. The WIFI interface is connected to the WLAN access point, and the downstream interface and the WIFI interface are located on the same network bridge.

As shown in Figure 10, the device is applied to a user plane network element. The device may include, for example: a receiving module 1001, a decapsulation module 1002, and a sending module 1003. Optionally, the device may also include at least one of the following modules: a construction module 1004, an encapsulation module 1005, a judgment module 1006, and a three-layer forwarding module 1007.

The receiving module 1001 is used to receive the first GTPU message sent by the WLAN interworking network element; the first GTPU message is obtained by encapsulating the first vxlan message sent by the connecting device by the WLAN interworking network element. The first vxlan message is The connecting device encapsulates the first Ethernet data packet sent by the terminal. The header of the first vxlan message includes: the IP address of the user plane network element. The header of the first Ethernet data packet includes: the MAC of the DN server. address.

The decapsulation module 1002 is configured to decapsulate the first GTPU message to obtain the first vxlan message, and decapsulate the first vxlan message to obtain the first Ethernet data packet.

The sending module 1003 is configured to send the first Ethernet data packet to the DN server according to the MAC address of the DN server.

One possible implementation method, building module 1004, is used to establish a vxlan tunnel with the connecting device and a GTPU tunnel with the WLAN interworking network element.

In a possible implementation manner, the first Ethernet data packet also includes the MAC address of the terminal; the message header of the first vxlan message also includes: the IP address of the connected device.

The building module 1004 is also used to build a vxlan tunnel information table. The vxlan tunnel information table includes: the MAC address of the terminal, the identifier of the vxlan tunnel, the IP address of the connecting device, and the mapping relationship between the IP addresses of the user plane network elements.

In one possible implementation, the receiving module 1001 is also configured to receive a second Ethernet data packet from the DN server; the header of the second Ethernet data packet includes: the MAC address of the terminal and the MAC address of the DN server.

The encapsulation module 1005 is used to encapsulate the second Ethernet data packet based on the vxlan tunnel information table to obtain the second vxlan message; the message header of the second vxlan message includes: the IP address of the connecting device, and the user plane network Yuan’s IP address.

The encapsulation module 1005 is also used to encapsulate the second vxlan message to obtain the second GTPU message.

The sending module 1003 is also used to send the second GTPU message to the WLAN interworking network element.

In one possible implementation, the judgment module 1006 is used to encapsulate the second Ethernet data packet based on the vxlan tunnel information table in the encapsulation module 1005 to obtain the second vxlan message. According to the vxlan tunnel information table, the terminal MAC address to determine whether to forward the second Ethernet data packet through the Layer 2 service data forwarding process.

In this implementation, the encapsulation module 1005 is specifically configured to encapsulate the second Ethernet data packet to obtain the second vxlan message when it is determined to forward the second Ethernet data packet through the Layer 2 service data forwarding process.

The Layer 3 forwarding module 1007 is configured to forward the second Ethernet data packet through the Layer 3 service data forwarding process when it is determined not to send the second Ethernet data packet through the vxlan tunnel.

The device provided by the embodiment of the present application can perform the actions of the user plane network element taking the UPF network element as an example in the above method embodiment. Its implementation principles and technical effects are similar and will not be described again here.

Figure 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As shown in Figure 11, the communication device may include: at least one processor 1101 and a memory 1102.

Memory 1102 is used to store programs. Specifically, the program may include program code, which includes computer operating instructions.

The memory 1102 may include high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The processor 1101 is configured to execute computer execution instructions stored in the memory 1102 to implement the actions of the connecting device in the foregoing method embodiment, or the actions of the WLAN interworking network element, or the actions of the user plane network element. The processor 1101 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present application. .

Optionally, the communication device may also include a communication interface 1103 for communicating and interacting with external devices. In terms of specific implementation, if the communication interface 1103, the memory 1102 and the processor 1101 are implemented independently, the communication interface 1103, the memory 1102 and the processor 1101 can be connected to each other through a bus and complete mutual communication.

Optionally, in terms of specific implementation, if the communication interface 1103, the memory 1102 and the processor 1101 are integrated on one chip, the communication interface 1103, the memory 1102 and the processor 1101 can complete communication through the internal interface.

This application also provides a computer-readable storage medium. The computer-readable storage medium may include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM) , magnetic disks or optical disks and other various media that can store program codes. Specifically, the computer-readable storage medium stores program instructions, and the program instructions are used to implement the actions of the connecting device in the above method implementation, or WLAN interworking network elements actions, or actions of user plane network elements.

This application also provides a communication system. The communication system includes: a WLAN access point, a WLAN interworking network element, at least one connecting device, and a user plane network element; the connecting device includes a drop-in interface and a WIFI interface, and the connection device passes through a drop-down interface. There is at least one terminal attached to the interface. The connecting device is connected to the WLAN access point through the WIFI interface. The downstream interface and the WIFI interface are located on the same network bridge.

The connecting device, WLAN interworking network element, and user plane network element are respectively used to perform the actions in the above method embodiment to realize the transmission of layer 2 data.

Other embodiments of the present application will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary technical means in the technical field that are not disclosed in this application. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (20)

1. A communication method, characterized in that the communication system includes: a WLAN access point, a WLAN interworking network element, at least one connection device, and a user plane network element; the connection device includes a drop-in interface and a WIFI interface, and the connection The device is connected to at least one terminal through the drop-down interface, the connection device is connected to the WLAN access point through the WIFI interface, and the drop-down interface and the WIFI interface are located on the same network bridge. The method includes: The connection device receives the first Ethernet data packet sent by the terminal, and the header of the first Ethernet data packet includes: the MAC address of the DN server; The connection device encapsulates the first Ethernet data packet to obtain a first vxlan message; the message header of the first vxlan message includes: the IP address of the user plane network element; The connection device transparently transmits the first vxlan message to the WLAN interworking network element through the WLAN access point, so that the WLAN interworking network element sends the first Ethernet data packet through the user plane network element. to the DN server. 2. The method according to claim 1, characterized in that, the method further comprises: The connection device obtains the IP address assigned by the core network control plane network element; And, the connection device establishes a vxlan tunnel with the user plane network element. 3. The method according to claim 2, characterized in that the first Ethernet data packet further includes the MAC address of the terminal; the message header of the first vxlan message further includes: the connection device IP address. 4. The method according to claim 3, characterized in that the method further includes: The connection device receives the second vxlan message transparently transmitted by the WLAN interworking network element through the WLAN access point; the second vxlan message is obtained by decapsulating the second GTPU message by the WLAN interworking network element, The second GTPU message is obtained by encapsulating a second vxlan message by the user plane network element, and the second vxlan message is a second Ethernet message sent by the user plane network element to the DN server. The data packet is encapsulated; the header of the second Ethernet data packet includes: the MAC address of the terminal, and the MAC address of the DN server; the header of the second vxlan message includes: The IP address of the connected device and the IP address of the user plane network element; The connection device decapsulates the second vxlan message to obtain the second Ethernet data packet; The connection device sends the second Ethernet data packet to the terminal according to the MAC address of the terminal carried in the second Ethernet data packet. 5. A communication method, characterized in that the communication system includes: a WLAN access point, a WLAN interworking network element, at least one connection device, and a user plane network element; the connection device includes a drop-in interface and a WIFI interface, and the connection The device is connected to at least one terminal through the drop-down interface, the connection device is connected to the WLAN access point through the WIFI interface, and the drop-down interface and the WIFI interface are located on the same network bridge. The method includes: The WLAN interworking network element receives the first vxlan message transparently transmitted by the connecting device through the WLAN access point; the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device. , the message header of the first vxlan message includes: the IP address of the user plane network element, and the header of the first Ethernet data packet includes: the MAC address of the DN server; The WLAN interworking network element encapsulates the first vxlan message to obtain a first GTPU message; The WLAN interworking network element sends the first GTPU message to the user plane network element according to the IP address of the user plane network element carried in the first vxlan message, so that the user plane network element The element sends the first Ethernet data packet to the DN server. 6. The method according to claim 5, characterized in that, the method further comprises: The WLAN interworking network element establishes a GTPU tunnel with the user plane network element. 7. The method according to claim 5, characterized in that the first Ethernet data packet further includes the MAC address of the terminal; the message header of the first vxlan message further includes: the connection device IP address. 8. The method according to any one of claims 5-7, characterized in that the method further includes: The WLAN interworking network element receives the second GTPU message sent by the user plane network element; the second GTPU message is obtained by encapsulating the second vxlan message by the user plane network element, and the second GTPU message is obtained by encapsulating the second vxlan message by the user plane network element. The vxlan message is obtained by the user plane network element encapsulating the second Ethernet data packet sent by the DN server; the header of the second Ethernet data packet includes: the MAC address of the terminal, and, The MAC address of the DN server; the message header of the second vxlan message includes: the IP address of the connecting device, and the IP address of the user plane network element; The WLAN interworking network element decapsulates the second GTPU message to obtain the second vxlan message; The WLAN interworking network element transparently transmits the second vxlan message to the connecting device through the WLAN access point according to the IP address of the connecting device carried in the second vxlan message, so that the connection The device sends the second Ethernet data packet to the terminal. 9. A communication method, characterized in that the communication system includes: a WLAN access point, a WLAN interworking network element, at least one connection device, and a user plane network element; the connection device includes a drop-in interface and a WIFI interface, and the connection The device is connected to at least one terminal through the drop-down interface, the connection device is connected to the WLAN access point through the WIFI interface, and the drop-down interface and the WIFI interface are located on the same network bridge. The method includes: The user plane network element receives the first GTPU message sent by the WLAN interworking network element; the first GTPU message is obtained by encapsulating the first vxlan message sent by the connecting device by the WLAN interworking network element. , the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device, and the message header of the first vxlan message includes: the IP address of the user plane network element, The header of the first Ethernet data packet includes: the MAC address of the DN server; The user plane network element decapsulates the first GTPU message to obtain the first vxlan message; The user plane network element decapsulates the first vxlan message to obtain the first Ethernet data packet; The user plane network element sends the first Ethernet data packet to the DN server according to the MAC address of the DN server. 10. The method according to claim 9, characterized in that the method further comprises: The user plane network element establishes a vxlan tunnel with the connection device; And, the user plane network element establishes a GTPU tunnel with the WLAN interworking network element. 11. The method according to claim 10, characterized in that the first Ethernet data packet further includes the MAC address of the terminal; the message header of the first vxlan message further includes: the connection device IP address; The method also includes: The user plane network element constructs the vxlan tunnel information table. The vxlan tunnel information table includes: the MAC address of the terminal, the identifier of the vxlan tunnel, the IP address of the connecting device, and the user plane Mapping relationship between IP addresses of network elements. 12. The method according to claim 11, characterized in that the method further comprises: The user plane network element receives the second Ethernet data packet from the DN server; the header of the second Ethernet data packet includes: the MAC address of the terminal, and the MAC address of the DN server; The user plane network element encapsulates the second Ethernet data packet based on the vxlan tunnel information table to obtain a second vxlan message; the message header of the second vxlan message includes: the connection device The IP address, and the IP address of the user plane network element; The user plane network element encapsulates the second vxlan message to obtain a second GTPU message; The user plane network element sends the second GTPU message to the WLAN interworking network element. 13. The method according to claim 12, wherein the user plane network element encapsulates the second Ethernet data packet based on the vxlan tunnel information table, and before obtaining the second vxlan message, include: The user plane network element determines whether to forward the second Ethernet data packet through the Layer 2 service data forwarding process according to the vxlan tunnel information table and the MAC address of the terminal; The user plane network element encapsulates the second Ethernet data packet to obtain a second vxlan message, including: When the user plane network element determines to forward the second Ethernet data packet through the Layer 2 service data forwarding process, it encapsulates the second Ethernet data packet to obtain a second vxlan message. 14. The method according to claim 13, characterized in that the method further comprises: When the user plane network element determines not to send the second Ethernet data packet through the vxlan tunnel, it performs forwarding processing through the Layer 3 service data forwarding process. 15. A communication device, characterized in that the communication system includes: a WLAN access point, a WLAN interworking network element, at least one connection device, and a user plane network element; the connection device includes a drop-in interface and a WIFI interface, and the connection The device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the device is used in The connection equipment and the device include: A receiving module, configured to receive the first Ethernet data packet sent by the terminal, where the header of the first Ethernet data packet includes: the MAC address of the DN server; An encapsulation module, used to encapsulate the first Ethernet data packet to obtain a first vxlan message; the message header of the first vxlan message includes: the IP address of the user plane network element; A sending module, configured to transparently transmit the first vxlan message to the WLAN interworking network element through the WLAN access point, so that the WLAN interworking network element transmits the first Ethernet data packet through the user plane network element. Sent to the DN server. 16. A communication device, characterized in that the communication system includes: a WLAN access point, a WLAN interworking network element, at least one connection device, and a user plane network element; the connection device includes a drop-in interface and a WIFI interface, and the connection The device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the device is used in For the WLAN interworking network element, the device includes: A receiving module, configured to receive the first vxlan message transparently transmitted by the connecting device through the WLAN access point; the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device. , the message header of the first vxlan message includes: the IP address of the user plane network element, and the header of the first Ethernet data packet includes: the MAC address of the DN server; An encapsulation module, used to encapsulate the first vxlan message to obtain the first GTPU message; A sending module, configured to send the first GTPU message to the user plane network element according to the IP address of the user plane network element carried in the first vxlan message, so that the user plane network element Send the first Ethernet data packet to the DN server. 17. A communication device, characterized in that the communication system includes: a WLAN access point, a WLAN interworking network element, at least one connection device, and a user plane network element; the connection device includes a drop-in interface and a WIFI interface, and the connection The device is connected to at least one terminal through the drop-in interface, the connection device is connected to the WLAN access point through the WIFI interface, the drop-in interface and the WIFI interface are located on the same network bridge, and the device is used in The user plane network element and the device include: A receiving module, configured to receive the first GTPU message sent by the WLAN interworking network element; the first GTPU message is obtained by encapsulating the first vxlan message sent by the connecting device by the WLAN interworking network element. , the first vxlan message is obtained by encapsulating the first Ethernet data packet sent by the terminal by the connecting device. The message header of the first vxlan message includes: the IP address of the user plane network element, so The header of the first Ethernet data packet includes: the MAC address of the DN server; A first decapsulation module, configured to decapsulate the first GTPU message to obtain the first vxlan message; a second decapsulation module, configured to decapsulate the first vxlan message to obtain the first Ethernet data packet; A sending module, configured to send the first Ethernet data packet to the DN server according to the MAC address of the DN server. 18. A communication device, characterized by comprising: a processor, and a memory communicatively connected to the processor; The memory stores computer execution instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 14. 19. A communication system, characterized in that the communication system includes: a WLAN access point, a WLAN interworking network element, at least one connection device, and a user plane network element; the connection device includes a drop-in interface and a WIFI interface, so The connection device is connected to at least one terminal through the drop-down interface, the connection device is connected to the WLAN access point through a WIFI interface, and the drop-down interface and the WIFI interface are located on the same network bridge; The connection device is used to perform the method according to any one of claims 1 to 4; The WLAN interworking network element is used to perform the method according to any one of claims 5 to 8; The user plane network element is used to perform the method according to any one of claims 9 to 14. 20. A computer-readable storage medium, characterized in that computer-executable instructions are stored in the computer-readable storage medium, and when executed by a processor, the computer-executable instructions are used to implement any one of claims 1 to 14. the method described.