CN118474914A - Data communication method, device, electronic equipment and storage medium - Google Patents

Abstract

The application provides a data communication method, a data communication device, electronic equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: acquiring target data to be transmitted; inquiring and acquiring a target transmission channel identifier corresponding to target data to be transmitted based on a preset forwarding mapping table, wherein the preset forwarding mapping table is created through a virtual terminal in a management node, and comprises the following steps: the mapping relation between the node transmission channel identification and the tunnel key value corresponding to the general routing encapsulation GRE tunnel; based on the target transmission channel indicated by the target transmission channel identification, forwarding target data to be transmitted to target equipment, realizing that the T node without NAS function can be supported to access to the 5G network without updating protocol stack firmware of the T node, and the G node can be supported to access to the 5G network in a wired connection mode by adding virtual UE without changing a star flash protocol stack in the G node, thereby realizing the rapid construction of the star flash fusion system.

Description

Data communication method, device, electronic equipment and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data communication method, a data communication device, an electronic device, and a storage medium.

Background

The star flash wireless communication technology is a wireless short-distance communication technology and is used for carrying data interaction of application scenes in the fields of intelligent automobiles, intelligent households, intelligent terminals, intelligent manufacturing and the like. The star flash wireless communication system is composed of a star flash access layer, a basic service layer and a basic application layer, wherein the star flash access layer can also be called as a star flash bottom layer, the basic service layer and the basic application layer form a star flash upper layer, and the star flash access layer is divided into a management node (G node) and a terminal node (T node).

In a star-flash 5G fusion system constructed based on a star-flash wireless communication technology, for a T node without NAS function, a trusted G node must be relied on to access a 5G network through a wireless interface; in addition, when a trusted G node accesses a 5G network in a wired manner, the T node must have NAS functionality to access the 5G network through the G node.

Therefore, the connection mode of the G node and the T node in the existing star-flash 5G fusion system has higher requirements, and the star-flash 5G fusion system is difficult to construct.

Disclosure of Invention

The application aims to overcome the defects in the prior art and provide a data communication method, a device, electronic equipment and a storage medium, wherein a star flash fusion system can be quickly constructed.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the application is as follows:

in a first aspect, the present invention provides a data communication method, the method being applied to a management node, the management node being in wireless communication connection with at least one managed node through a first interface, and being in communication connection with a trusted access gateway through a second interface and a third interface, respectively, the trusted access gateway being in communication connection with an access and mobility management function AMF network element and a user plane function UPF network element in a communication system, respectively, the management node being configured to include at least one virtual terminal, and each of the virtual terminals being in communication connection with the AMF network element through an N1 interface, the method comprising:

Acquiring target data to be transmitted;

Inquiring and acquiring a target transmission channel identifier corresponding to the target data to be transmitted based on a preset forwarding mapping table, wherein the preset forwarding mapping table is created through a virtual terminal in the management node, and the preset forwarding mapping table comprises: the method comprises the steps that a mapping relation between a node transmission channel identifier and a tunnel key value corresponding to a general routing encapsulation GRE tunnel is provided, wherein the node transmission channel identifier is a transmission channel identifier distributed by a management node for each managed node, and the GRE tunnel is a data transmission tunnel between a virtual terminal in the management node and the trusted access gateway;

and forwarding the target data to be transmitted to target equipment based on the target transmission channel indicated by the target transmission channel identification.

In an optional implementation manner, the forwarding, to a target device, the target data to be transmitted based on the target transmission channel indicated by the target transmission channel identifier includes:

If the target transmission channel is a target GRE tunnel, forwarding the target data to be transmitted to the trusted access gateway through a target virtual terminal based on the target GRE tunnel;

And if the target transmission channel is the transmission channel corresponding to the target managed node, forwarding the target data to be transmitted to the target managed node through a target virtual terminal based on the transmission channel corresponding to the target managed node.

In an alternative embodiment, the method further comprises:

acquiring a media access layer identifier of the managed node;

Creating a virtual terminal according to the media access layer identifier so that the virtual terminal can finish authentication registration, and sending a PDU session establishment request to the trusted access gateway through the virtual terminal so that a GPRS tunneling protocol user plane GTP-U tunnel is established between the trusted access gateway and UPF through the virtual terminal and a GRE tunnel is established between the trusted access gateway and the virtual terminal;

And establishing the preset forwarding mapping table through the virtual terminal based on the media access layer identifier of the managed node and the GRE tunnel, wherein the virtual terminal supports a non-access layer protocol NAS, an extensible authentication protocol and the GRE protocol.

In an optional embodiment, the creating a virtual terminal according to the media access layer identifier to enable the virtual terminal to complete authentication registration, and sending a PDU session establishment request to the trusted access gateway through the virtual terminal includes:

Creating a virtual terminal according to the media access layer identifier, and sending a terminal authentication request to the trusted access gateway through the virtual terminal so as to forward the terminal authentication request to the AMF network element through the trusted access gateway, wherein the terminal authentication request comprises an international mobile equipment identification code of the virtual terminal;

Receiving an authentication registration success message sent by the AMF network element forwarded by the trusted access gateway through the virtual UE;

And sending a PDU session establishment request to the trusted access gateway through the virtual terminal based on the next generation access and mobile NGAP protocol according to the authentication registration success message.

In an alternative embodiment, the control flow is transmitted between the management node and the trusted access gateway based on an authentication authorization accounting protocol; transmitting a control flow between a virtual terminal in the management node and the trusted access gateway based on an extensible authentication protocol; the control flow is transmitted between the virtual UE and the AMF in the management node based on a non-access stratum protocol NAS; and the control flow is transmitted between the trusted access gateway and the AMF based on an NGAP protocol.

In an alternative embodiment, the virtual terminal in the management node and the trusted access gateway transmit service data flows based on GRE protocol, and the trusted access gateway and the AMF transmit service data flows based on GTP-U protocol.

In an alternative embodiment, the management node is in wireless communication connection with at least one managed node via a first interface based on a star flash protocol.

In a second aspect, the present invention provides a data communication apparatus, the apparatus being applied to a management node, the management node being in wireless communication connection with at least one managed node through a first interface, and in communication connection with a trusted access gateway through a second interface and a third interface, respectively, the trusted access gateway being in communication connection with an access and mobility management function AMF network element and a user plane function UPF network element in a communication system, respectively, the management node being configured to include at least one virtual terminal, and each of the virtual terminals being in communication connection with the AMF network element through an N1 interface, the apparatus comprising:

The acquisition module is used for acquiring target data to be transmitted;

The query module is configured to query and obtain a target transmission channel identifier corresponding to the target data to be transmitted based on a preset forwarding mapping table, where the preset forwarding mapping table is created by a virtual terminal in the management node, and the preset forwarding mapping table includes: the method comprises the steps that a mapping relation between a node transmission channel identifier and a tunnel key value corresponding to a general routing encapsulation GRE tunnel is provided, wherein the node transmission channel identifier is a transmission channel identifier distributed by a management node for each managed node, and the GRE tunnel is a data transmission tunnel between a virtual terminal in the management node and the trusted access gateway;

and the transmission module is used for forwarding the target data to be transmitted to target equipment based on the target transmission channel indicated by the target transmission channel identification.

In an optional implementation manner, the transmission module is specifically configured to forward, if the target transmission channel is a target GRE tunnel, the target data to be transmitted to the trusted access gateway through a target virtual terminal based on the target GRE tunnel;

And if the target transmission channel is the transmission channel corresponding to the target managed node, forwarding the target data to be transmitted to the target managed node through a target virtual terminal based on the transmission channel corresponding to the target managed node.

In an alternative embodiment, the data communication apparatus further comprises: the establishing module is used for acquiring the media access layer identification of the managed node;

Creating a virtual terminal according to the media access layer identifier so that the virtual terminal can finish authentication registration, and sending a PDU session establishment request to the trusted access gateway through the virtual terminal so that a GPRS tunneling protocol user plane GTP-U tunnel is established between the trusted access gateway and UPF through the virtual terminal and a GRE tunnel is established between the trusted access gateway and the virtual terminal;

And establishing the preset forwarding mapping table through the virtual terminal based on the media access layer identifier of the managed node and the GRE tunnel, wherein the virtual terminal supports a non-access layer protocol NAS, an extensible authentication protocol and the GRE protocol.

In an optional implementation manner, the establishing module is specifically configured to establish a virtual terminal according to the media access layer identifier, and send a terminal authentication request to the trusted access gateway through the virtual terminal, so that the terminal authentication request is forwarded to the AMF network element through the trusted access gateway, where the terminal authentication request includes an international mobile equipment identifier of the virtual terminal;

Receiving an authentication registration success message sent by the AMF network element forwarded by the trusted access gateway through the virtual UE;

And sending a PDU session establishment request to the trusted access gateway through the virtual terminal based on the next generation access and mobile NGAP protocol according to the authentication registration success message.

In an alternative embodiment, the control flow is transmitted between the management node and the trusted access gateway based on an authentication authorization accounting protocol; transmitting a control flow between a virtual terminal in the management node and the trusted access gateway based on an extensible authentication protocol; the control flow is transmitted between the virtual UE and the AMF in the management node based on a non-access stratum protocol NAS; and the control flow is transmitted between the trusted access gateway and the AMF based on an NGAP protocol.

In an alternative embodiment, the virtual terminal in the management node and the trusted access gateway transmit service data flows based on GRE protocol, and the trusted access gateway and the AMF transmit service data flows based on GTP-U protocol.

In an alternative embodiment, the management node is in wireless communication connection with at least one managed node via a first interface based on a star flash protocol.

In a third aspect, the present invention provides an electronic device comprising: a processor, a storage medium, and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating over the bus when the electronic device is operating, the processor executing the machine-readable instructions to perform the steps of the data communication method as in any of the previous embodiments.

In a fourth aspect, the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of a data communication method as described in any of the previous embodiments.

The beneficial effects of the application are as follows:

The data communication method, the device, the electronic equipment and the storage medium provided by the embodiment of the application can be applied to a management node, wherein the management node is in wireless communication connection with at least one managed node through a first interface, is in communication connection with a trusted access gateway through a second interface and a third interface respectively, the trusted access gateway is in communication connection with an access and mobile management function (AMF) network element and a User Plane Function (UPF) network element in a communication system respectively, the management node is configured to comprise at least one virtual terminal, and each virtual terminal is in communication connection with the AMF network element through an N1 interface, and the method comprises the following steps: acquiring target data to be transmitted; inquiring and acquiring a target transmission channel identifier corresponding to the target data to be transmitted based on a preset forwarding mapping table, wherein the preset forwarding mapping table is created through a virtual terminal in the management node, and the preset forwarding mapping table comprises: the method comprises the steps that a mapping relation between a node transmission channel identifier and a tunnel key value corresponding to a general routing encapsulation GRE tunnel is provided, wherein the node transmission channel identifier is a transmission channel identifier distributed by a management node for each managed node, and the GRE tunnel is a data transmission tunnel between a virtual terminal in the management node and the trusted access gateway; based on a target transmission channel indicated by the target transmission channel identification, forwarding the target data to be transmitted to target equipment, so that when a star-flash fusion system is built based on the existing star-flash wireless communication system, a T node without NAS function is not required to be subjected to protocol stack firmware upgrade, the T node can be supported to access a 5G network, and the star-flash fusion system is quickly built; in addition, the G node can be supported to access the 5G network in a wired connection mode by adding the virtual UE without changing the star flash protocol stack in the G node, so that the star flash fusion system is quickly constructed, and the applicability of the method is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a network architecture suitable for use in the method provided by embodiments of the present application;

Fig. 2 is a schematic flow chart of a data communication method according to an embodiment of the present application;

fig. 3 is a flow chart of another data communication method according to an embodiment of the present application;

fig. 4 is a flow chart of another data communication method according to an embodiment of the present application;

fig. 5 is a schematic diagram of a control plane protocol stack structure of a star-flash fusion system according to an embodiment of the present application;

Fig. 6 is a schematic diagram of a data plane protocol stack structure of a star-flash fusion system according to an embodiment of the present application;

fig. 7 is a schematic functional block diagram of a data communication device according to an embodiment of the present application;

Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The technical scheme of the embodiment of the application can be applied to various star flash fusion systems, wherein the star flash fusion system can be constructed based on a local communication system and a star flash (SPARKLINK) wireless communication technology, and the local communication system comprises the following steps: global mobile communications (global system for mobile communications, GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GENERAL PACKET radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile communications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communications system, fifth generation (5th generation,5G) communications system, or future new radio access technology (new radio access technology, NR), etc.

The star flash wireless communication technology is a wireless short-distance communication technology and is used for carrying data interaction of application scenes in the fields of intelligent automobiles, intelligent households, intelligent terminals, intelligent manufacturing and the like. The star-flash wireless communication system constructed based on the star-flash wireless communication technology consists of a star-flash access layer, a basic service layer and a basic application layer, wherein the star-flash access layer can also be called as a star-flash bottom layer, the basic service layer and the basic application layer form a star-flash upper layer, and the star-flash access layer is divided into a management node (G node) and a terminal node (T node or managed node).

In the star-flash 5G fusion system, besides providing pure wireless short-distance communication, the star-flash wireless communication system can also support fusion with a 5G network, support registration sensing, qoS policy management and communication state monitoring of a 5G core network to a star-flash wireless communication node, and realize unified management and maintenance of the 5G core network to the covered star-flash wireless communication network.

In the star-flash 5G fusion system, a T node and a G node communicate through a star-flash short-distance communication network, a G node and a 5G core network session network element communicate through a 5G network, and the T node communicates with the 5G core network session network element through the star-flash short-distance communication network and the 5G network, wherein the star-flash wireless short-distance communication network is non-3 GPP communication, and the communication corresponding to the 5G network is 3GPP communication.

The overall system can be divided into a type one, a type two and a type three according to the different types and functions of network elements involved in the interaction between the star-flash wireless communication system and the 5G cellular network. Three types of typical features are as follows:

Type one: the 5G core network supports equipment sensing and interaction of G nodes and T nodes under the coverage of the star flash wireless communication system. The 5G fusion functional unit of the T node has NAS function, and the G node is a trusted convergence management node and has the 5G fusion functional unit.

Type two: the 5G core network only supports the device sensing and interaction of the G node under the coverage of the star flash wireless communication system. The G node is a trusted management node and is provided with a 5G fusion functional unit.

Type three: the 5G core network supports equipment sensing and interaction of G nodes and T nodes under the coverage of the star flash wireless communication system. The 5G fusion functional unit of the T node does not have NAS function, the G node is a trusted management node and has the 5G fusion functional unit, and the T node is accessed to the 5G network through the trusted star flash access gateway.

It can be seen that in the existing star flash 5G fusion system, for a T node without NAS function, a trusted G node must be relied on to access a 5G network through a wireless interface; in addition, when a trusted G node accesses a 5G network in a wired manner, the T node must have NAS functionality to access the 5G network through the G node. Therefore, the connection mode of the G node and the T node in the existing star-flash 5G fusion system has higher requirements, and the star-flash 5G fusion system is difficult to construct.

Fig. 1 is a schematic diagram of a network architecture suitable for use in the method provided by the embodiment of the present application. As shown in fig. 1, the network architecture may be, for example, a non-roaming (non-roaming) architecture. The network architecture may specifically include the following network elements:

Access Network (AN): the network access function is provided for authorized users in a specific area, and transmission tunnels with different qualities can be used according to the level of the users, the requirements of services and the like. The access network may be an access network employing different access technologies. There are two types of current radio access technologies: third generation partnership project (3rd generation partnership project,3GPP) access technologies (e.g., radio access technologies employed in 3G, 4G, or 5G systems) and non-third generation partnership project (non-3 GPP) access technologies. The 3GPP access technology refers to an access technology conforming to the 3GPP standard specification, and an access network employing the 3GPP access technology is referred to as a radio access network (radio access network, RAN), wherein an access network device in the 5G system is referred to as a next generation base station node (next generation Node Base station, gNB). The non-3GPP access technology refers to an access technology that does not conform to the 3GPP standard specification, for example, a null technology represented by an Access Point (AP) in WIFI.

An access network implementing access network functions based on wireless communication technology may be referred to as a radio access network (radio access network, RAN). The radio access network can manage radio resources, provide access service for the terminal, and further complete the forwarding of control signals and user data between the terminal and the core network.

An access network device may comprise, among other things, a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The access network system may be configured to convert received air frames to and from internet protocol (internet protocol, IP) packets as a router between the wireless terminal and the rest of the access network, which may include an IP network. The radio access network system may also coordinate attribute management for the air interface. It should be understood that access network devices include, but are not limited to: an evolved node B (eNB), a radio network controller (radio network controller, RNC), a Node B (NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved nodeB, or home node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIRELESS FIDELITY, WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (transmission and reception point, TRP, or transmission point, TP), etc., may also be 5G, e.g., NR, a gNB in a system, or a transmission point (TRP or TP), one or a group (including multiple antenna panels) of base stations in a 5G system antenna panels, or may also be network nodes constituting a gNB or transmission point, such as a baseband unit (BBU)), or a distributed unit (distribute dunit, DU), etc.

In some deployments, the gNB may include a centralized unit (centralized unit, CU) and DUs. The gNB may also include a Radio Unit (RU). The CU implements part of the functions of the gNB, the DU implements part of the functions of the gNB, for example, the CU implements the functions of a radio resource control (radio resource control, RRC), a packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer, and the DU implements the functions of a radio link control (radio link control, RLC), a medium access control (MEDIA ACCESS control, MAC), and a Physical (PHY) layer. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+cu. It is understood that the access network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. In addition, the CU may be divided into access network devices in an access network (radio access network, RAN), or may be divided into access network devices in a Core Network (CN), which is not limited herein.

Access and mobility management function (ACCESS AND mobility management function, AMF) entity: the method is mainly used for mobility management, access management and the like, and can be used for realizing other functions besides session management in the functions of a mobility management entity (mobility MANAGEMENT ENTITY, MME), such as legal interception, access authorization (or authentication) and the like. In the embodiment of the application, the method and the device can be used for realizing the functions of the access and mobile management network elements.

Session management function (session management function, SMF) entity: the method is mainly used for session management, internet protocol (Internet Protocol, IP) address allocation and management of the UE, terminal nodes of a selective manageable user plane function, policy control or charging function interface, downlink data notification and the like. In the embodiment of the application, the method and the device can be used for realizing the function of the session management network element.

User plane function (User Plane Function, UPF) entity: i.e. a data plane gateway. Can be used for packet routing and forwarding, or quality of service (quality of service, qoS) handling of user plane data, etc. User data may be accessed to a Data Network (DN) through the network element. In the embodiment of the application, the method and the device can be used for realizing the functions of the user plane gateway.

Policy control function (policy control function, PCF) entity: a unified policy framework for guiding network behavior, providing policy rule information for control plane function network elements (e.g., AMF, SMF network elements, etc.), and the like.

Unified data management (unified DATA MANAGEMENT, UDM) entity: for handling user identification, access authentication, registration, or mobility management, etc.

N3IWF (Non-3 GPP Inter Working Function ): is responsible for accessing untrusted non-3GPP access networks (e.g., wi-Fi) to the 5G core network. The UE and the N3IWF establish an IPsec tunnel, and the N3IWF is connected to a control plane and a user plane of the 5G core network through an N2 interface and an N3 interface respectively.

In the network architecture, an N1 interface is a reference point between a virtual terminal and an AMF entity; the N2 interface is a reference point of TNGF and an AMF entity, and is used for sending non-access stratum (NAS) messages and the like; the N3 interface is a reference point between the (R) AN and the UPF entity and is used for transmitting data of a user plane and the like; the N4 interface is a reference point between the SMF entity and the UPF entity, and is used for transmitting information such as tunnel identification information, data buffer indication information, downlink data notification message, and the like of the N3 connection; the N5 interface is a reference point between the UPF entity and the DN, and is used for transmitting data of the user plane, etc.

It should be understood that the network architecture applied to the embodiments of the present application is merely an exemplary network architecture described from the perspective of a conventional point-to-point architecture and a service architecture, and the network architecture to which the embodiments of the present application are applicable is not limited thereto, and any network architecture capable of implementing the functions of the respective network elements described above is applicable to the embodiments of the present application.

It should also be understood that the AMF entity, SMF entity, UPF entity, PCF entity and UDM entity shown in fig. 1 may be understood as network elements in the core network for implementing different functions, e.g. may be combined into network slices as required. The core network elements may be independent devices, or may be integrated in the same device to implement different functions, which is not limited in the present application.

Hereinafter, for convenience of explanation, an entity for implementing an AMF will be referred to as an AMF, and an entity for implementing a PCF will be referred to as a PCF. It should be understood that the above designations are merely for distinguishing between different functions, and do not represent that these network elements are separate physical devices, and the specific form of the network elements is not limited in the present application, and may be, for example, integrated in the same physical device or may be separate physical devices. Furthermore, the above designations are merely for convenience in distinguishing between different functions and should not be construed as limiting the application in any way, and the application does not exclude the possibility of employing other designations in 5G networks and other networks in the future. For example, in a 6G network, some or all of the individual network elements may follow the terminology in 5G, possibly by other names, etc. The description is unified herein, and will not be repeated.

It should also be understood that the names of interfaces between the network elements in fig. 1 are only an example, and the names of interfaces in the specific implementation may be other names, which are not limited in particular by the present application. Furthermore, the names of the transmitted messages (or signaling) between the various network elements described above are also merely an example, and do not constitute any limitation on the function of the message itself.

Referring to fig. 1, a management node (G node) performs a wireless communication connection with at least one managed node (T node) through a first interface SLAI, and performs a communication connection with a trusted access gateway through a second interface Ta and a third interface NWt, where the trusted access gateway is respectively in communication connection with an access and mobility management function AMF network element and a user plane function UPF network element in a communication system. Furthermore, the management node is configured to include at least one virtual terminal, and each virtual terminal is communicatively connected to the AMF network element through the N1 interface.

It should be noted that the number of T nodes connected to the G node is not limited in the present application, and may include one or more of the T nodes according to an actual application scenario, and in addition, the number of virtual UEs in the G node is the same as the number of T nodes connected to the G node, that is, one T node corresponds to one virtual UE.

The Trusted access gateway may be a Trusted Non-3GPP access gateway (Trusted Non-3GPP Gateway,TNGF), which may be any other type of gateway according to an actual application scenario, and is not limited herein. In addition, a first interface SLAI is configured to carry control plane and user plane data between the G node and the T node; the second interface Ta supports AAA protocol, which is used to bear EAP-5G business between G node and TNGF; a third interface NWt for carrying control plane and user plane data between G-nodes and TNGF.

In the grid architecture, the T node does not have NAS functionality and the G node accesses the 5G network in a wired manner. And the G node is used as network relay equipment to realize the access of the T node to the 5G network. The G node is a Trusted node of the 5G network and accesses the 5G network through a Trusted Non-3GPP access gateway (Trusted Non-3GPP Gateway,TNGF). The 5G core network can provide unified network management service for one or more T nodes covered by the 5G core network, and personalized and targeted 5G fusion service for different T nodes.

Fig. 2 is a flow chart of a data communication method according to an embodiment of the present application. For a better understanding of the present application, the local communication system is illustrated as a fifth generation (5th generation,5G) communication system. As shown in fig. 2, the method includes:

step 101, obtaining target data to be transmitted.

Alternatively, the target data to be transmitted may be obtained by any managed node, or may be obtained by the trusted access gateway TNGF, which is not limited herein. When the target data to be transmitted is obtained through the trusted access gateway TNGF, the target data to be transmitted may be directly generated by TNGF, or may be forwarded to other network elements in the 5G system, which is not limited herein.

Step 102, inquiring and acquiring a target transmission channel identifier corresponding to target data to be transmitted based on a preset forwarding mapping table, wherein the preset forwarding mapping table is created through a virtual terminal in a management node.

The preset forwarding mapping table comprises the following steps: the node transmission channel identifier is a transmission channel identifier distributed by the management node for each managed node, and the GRE tunnel is a data transmission tunnel between a virtual terminal and a trusted access gateway in the management node.

For the G node, the G node is used as a management node, a certain number of T nodes can be managed, and the G node and the T nodes are connected together to complete a specific communication function. For example, in an intelligent automobile scene, the automobile domain controller is used as a G node, and a plurality of vehicle-mounted terminals are used as T nodes, so that a communication domain of an intelligent cabin can be formed, and vehicle-mounted video and audio services can be provided for users.

In some embodiments, according to the requirements of each T node, the G node may allocate a corresponding transmission channel to each T node, and different T nodes may correspond to different transmission channel identifiers.

Wherein, the virtual terminal is a virtual device created on the G node, can be set in the form of a software module, and has the following functions: the virtual terminal and the trusted access gateway can transmit control flow based on non-access stratum NAS protocol; the terminal authentication message can be transmitted between the mobile terminal and the trusted access gateway based on an extensible authentication protocol EAP-5G; the service data flow can be transmitted between the trusted access gateway and the GRE protocol, the IP protocol and the L1/L2 protocol.

Optionally, the preset forwarding mapping table may be created by a virtual terminal in the management node, where after the virtual terminal establishes a GRE tunnel based on a GRE protocol and TNGF, the virtual terminal may create the preset forwarding mapping table according to a transmission channel identifier allocated to each managed node and a tunnel key value corresponding to the established GRE tunnel.

It should be noted that, the GRE tunnel may be used as a data transmission tunnel between the virtual terminal and the trusted access gateway in the management node, and may include multiple data transmission tunnels, where a T node corresponds to a virtual UE, a virtual UE corresponds to a GRE tunnel, and each GRE tunnel may be identified and distinguished by using different tunnel key values.

In some embodiments, the expression of the preset forwarding mapping table may be < TCID, key >. The TCID is a transmission channel identifier allocated to the G node for communication with the T node, and the Key is a Key value of a GRE tunnel established by the virtual UE and TNGF.

In some embodiments, the virtual terminal in the G node may transmit the target data to be transmitted, which is acquired through a T node, to the trusted access gateway through the corresponding GRE tunnel, and the trusted access gateway further transmits the target data to the UPF network element in the 5G system; of course, the G node may also transmit the target data to be transmitted, which is acquired through the trusted access gateway, to another T node through a transmission channel corresponding to the T node based on the first interface SLAI.

It can be seen that in the data communication method provided by the embodiment of the application, when the star-flash fusion system is constructed based on the existing star-flash wireless communication system, the T node without NAS function can be supported to access the 5G network without upgrading the protocol stack firmware, so that the star-flash fusion system is quickly constructed; in addition, the G node can be supported to access the 5G network in a wired connection mode by adding the virtual UE without changing the star flash protocol stack in the G node, so that the star flash fusion system is quickly constructed, and the applicability of the method is improved.

And step 103, forwarding target data to be transmitted to target equipment based on the target transmission channel indicated by the target transmission channel identification.

Based on the above description, it can be seen that, according to an actual application scenario, the target transmission channel indicated by the target transmission channel identifier may be a transmission channel allocated by the G node as the target T node, or may be a target GRE tunnel corresponding to the target T node between the virtual terminal and the trusted access gateway, which is not limited herein. Correspondingly, the target device may be a target T node or a trusted access gateway, which may be different according to the actual data communication scenario.

In summary, an embodiment of the present application provides a data communication method, where the method may be applied to a management node, where the management node is in wireless communication connection with at least one managed node through a first interface, and is in communication connection with a trusted access gateway through a second interface and a third interface, where the trusted access gateway is in communication connection with an access and mobility management function AMF network element and a user plane function UPF network element in a communication system, where the management node is configured to include at least one virtual terminal, and each virtual terminal is in communication connection with the AMF network element through an N1 interface, and the method includes: acquiring target data to be transmitted; inquiring and acquiring a target transmission channel identifier corresponding to target data to be transmitted based on a preset forwarding mapping table, wherein the preset forwarding mapping table is created through a virtual terminal in a management node, and comprises the following steps: the method comprises the steps that a mapping relation between a node transmission channel identifier and a tunnel key value corresponding to a general routing encapsulation GRE tunnel is provided, wherein the node transmission channel identifier is a transmission channel identifier distributed by a management node for each managed node, and the GRE tunnel is a data transmission tunnel between a virtual terminal and a trusted access gateway in the management node; the target transmission channel indicated by the target transmission channel identification is used for forwarding target data to be transmitted to target equipment, so that when the star-flash fusion system is built based on the existing star-flash wireless communication system, the T node without NAS function can be supported to access a 5G network without upgrading protocol stack firmware, and the star-flash fusion system is quickly built; in addition, the G node can be supported to access the 5G network in a wired connection mode by adding the virtual UE without changing the star flash protocol stack in the G node, so that the star flash fusion system is quickly constructed, and the applicability of the method is improved.

In an optional embodiment, the forwarding, to the target device, the target data to be transmitted based on the target transmission channel indicated by the target transmission channel identifier includes:

If the target transmission channel is a target GRE tunnel, forwarding target data to be transmitted to the trusted access gateway through the target virtual terminal based on the target GRE tunnel; if the target transmission channel is the transmission channel corresponding to the target managed node, forwarding target data to be transmitted to the target managed node through the target virtual terminal based on the transmission channel corresponding to the target managed node.

If the target transmission channel is a target GRE tunnel, that is, the target data to be transmitted is transmission data which is acquired by the G node through the target T node and is used for forwarding to the 5G network, then the target data to be transmitted can be forwarded to the trusted access gateway through the target virtual UE in the G node; of course, if the target transmission channel is a transmission channel corresponding to the target managed node, that is, the target data to be transmitted is the transmission data that is acquired by the G node through the 5G network and used for forwarding the target T node, at this time, the target data to be transmitted may be forwarded to the target T node through the target virtual UE in the G node, where the target virtual UE is a virtual UE corresponding to the target managed node, so that data interaction between the T node and the 5G network that do not have the NAS function is implemented.

Fig. 3 is a flow chart of another data communication method according to an embodiment of the present application. In an alternative embodiment, as shown in fig. 3, the method further includes:

step 201, a media access layer identifier of a managed node is obtained.

Step 202, creating a virtual terminal according to the media access layer identifier so that the virtual terminal can complete authentication registration, and sending a PDU session establishment request to the trusted access gateway through the virtual terminal so that a GPRS tunnel protocol user plane GTP-U tunnel is established between the trusted access gateway and the UPF through the virtual terminal, and a GRE tunnel is established between the trusted access gateway and the virtual terminal.

Step 203, based on the media access layer identifier of the managed node and the GRE tunnel, a preset forwarding mapping table is established through the virtual terminal.

The virtual terminal supports a non-access stratum protocol NAS, an extensible authentication protocol and a GRE protocol. The G Node can acquire the media access layer identification (T Node ID, TID) of each T Node; generating the virtual UE entity according to the TID, optionally, the generating the virtual UE entity according to the TID may include: the TID is converted to an international mobile equipment identity (International Mobile Equipment Identity, IMEI) of the virtual UE to uniquely identify the virtual UE.

After the virtual terminal is created according to the media access layer identifier, the authentication registration of the virtual UE can be completed on the 5G core network through terminal authentication interaction between the virtual UE and the trusted access gateway, and between the trusted access gateway and the AMF. It should be noted that, after the virtual UE is created, a public user identifier (Generic Public Subscription Identifier, GPSI) of the virtual UE may be generated, and the TID of the T node is in one-to-one correspondence with the generated GPSI.

After authentication registration of the virtual UE is completed on the 5G core network, the virtual UE may send a PDU session establishment request to TNGF through the NGAP protocol; TNGF after receiving a PDU session establishment request from the virtual UE, completing a PDU session establishment process with UPF according to a procedure specified by 3GPP, and establishing a GTP-U tunnel between TNGF and UPF; TNGF after finishing the establishment of the GTP-U tunnel with the UPF, establishing a GRE tunnel with the virtual UE through a GRE protocol; after the virtual UE completes the establishment of the GRE tunnel between the virtual UE and TNGF, a data forwarding mapping relation is created locally.

By applying the embodiment of the application, for each managed node, a corresponding virtual terminal can be created, and a corresponding preset data forwarding table can be created through the corresponding virtual terminal.

Fig. 4 is a flow chart of another data communication method according to an embodiment of the present application. In an alternative embodiment, as shown in fig. 4, the creating a virtual terminal according to the media access layer identifier, and sending, by the virtual terminal, a PDU session establishment request to the trusted access gateway includes:

Step 301, creating a virtual terminal according to the media access layer identifier, and sending a terminal authentication request to the trusted access gateway through the virtual terminal, so that the terminal authentication request is forwarded to the AMF network element through the trusted access gateway, wherein the terminal authentication request comprises an international mobile equipment identification code of the virtual terminal.

Step 302, receiving, by the virtual UE, an authentication registration success message sent by an AMF network element forwarded by the trusted access gateway.

Step 303, according to the authentication registration success message, a PDU session establishment request is sent to the trusted access gateway through the virtual terminal based on the next generation access and mobile NGAP protocol.

After creating the virtual UE, the virtual UE may initiate a terminal authentication request to TNGF, where the terminal authentication request includes an IMEI of the virtual UE; TNGF receives the EAP-5G authentication request and forwards a terminal authentication request to an AMF network element through an NGAP protocol; after receiving the UE authentication request from TNGF, the AMF completes authentication registration for the virtual UE according to the procedure specified by 3GPP, and returns an authentication registration success message to TNGF. The terminal authentication request may specifically be an EAP-5G authentication request, which is not limited to this, and may be different according to different supported protocols.

TNGF after receiving the authentication registration success message, the authentication registration success message may be further forwarded to the virtual UE, and after receiving the authentication registration success message from TNGF, the virtual UE sends a PDU session establishment request to TNGF through the NGAP protocol, and the procedure for establishing the PDU session may refer to steps 202 to 203 described above, which is not repeated herein.

Fig. 5 is a schematic diagram of a control plane protocol stack structure of a star-flash fusion system according to an embodiment of the present application. Fig. 6 is a schematic diagram of a data plane protocol stack structure of a star-flash fusion system according to an embodiment of the present application. In an alternative embodiment, referring to fig. 5 and 6, a control flow is transmitted between a management node and a trusted access gateway based on Authentication, authorization, and Accounting (AAA); the control flow is transmitted between the virtual UE and the trusted Access gateway in the management node based on extensible authentication protocol (EAP-Extensible Authentication Protocol G, EAP-5G), and the control flow is transmitted between the virtual UE and the AMF in the management node based on Non-Access Stratum (NAS); the control flow is transmitted between the trusted access gateway and the AMF based on Next-Generation ACCESS AND Mobility (NGAP) protocol.

As can be seen from fig. 5, the T node and the G node in the control plane protocol stack can transmit control flows based on Non-3GPP protocol through SLAI interfaces; the G node comprises: a Non-3GPP protocol layer, an L1/L2 layer, and an AAA protocol layer; TNGF includes: L1/L2 layer, AAA protocol layer, IP layer, SCTP layer, NGAP protocol layer, EAP-5G protocol layer, AMF includes: L1/L2 layer, IP layer, SCTP layer, NGAP protocol layer, NAS protocol layer. In addition, the virtual UE in the G node includes: EAP-5G protocol layer, NAS protocol layer, G node can based on Ta interface and TNGF transmission control flow, and virtual UE in the G node can based on NWT interface and TNGF transmission control flow, and virtual UE in the G node can based on N1 interface and AMF transmission control flow.

By applying the embodiment of the application, the G node and the T node can finish the authentication registration process of the T node accessing the 5G network through the control plane protocol stack, namely, the process of the T node accessing the 5G network can be controlled through the 5G network control plane.

In an alternative embodiment, the service data flow is transmitted between the virtual UE and the trusted access gateway in the management node based on the GRE protocol, and the service data flow is transmitted between the trusted access gateway and the AMF based on the GTP-U protocol.

As can be seen from fig. 6, the T node in the data plane protocol stack may include: SPARKLINK L2 layers, DTAP layers; the G node may include: a star flash access layer (SPARKLINK L layers), a transmission and adaptation layer (Downlink Transport Access Point, DTAP layers); the virtual UE in the G node includes: an L1/L2 layer, an IP layer, a generic routing encapsulation (Generic Routing Encapsulation, GRE) layer; TNGF includes: a physical layer/data link layer (L1/L2 layer), a UDP/IP layer, and a GPRS tunneling protocol User Plane (GTP-U) layer; the UPF includes: L1/L2 layer, UDP/IP layer, GTP-U layer.

By applying the embodiment of the application, the G node and the T node can complete the service data transmission process of the T node in the 5G network through the data plane protocol stack.

In an alternative embodiment, the management node is in wireless communication connection with at least one managed node via a first interface based on a star flash protocol.

The application is not limited to the number of the managed nodes, and may include one or more managed nodes according to an actual application scenario, where each managed node may be connected to the management node through a first interface in a wireless communication manner based on a star flash protocol. The specific communication process may refer to relevant standards of the star flash protocol, which are not described herein.

Fig. 7 is a schematic functional block diagram of a data communication device provided in an embodiment of the present application, where the data communication device is applied to a management node, the management node is in wireless communication connection with at least one managed node through a first interface, and is respectively in communication connection with a trusted access gateway through a second interface and a third interface, the trusted access gateway is respectively in communication connection with an access and mobility management function AMF network element and a user plane function UPF network element in a communication system, the management node is configured to include at least one virtual terminal, and each virtual terminal is in communication connection with the AMF network element through an N1 interface. As shown in fig. 7, the data communication apparatus 100 includes:

An acquisition module 110, configured to acquire target data to be transmitted;

The query module 120 is configured to query and obtain a target transmission channel identifier corresponding to target data to be transmitted based on a preset forwarding mapping table, where the preset forwarding mapping table is created by a virtual terminal in a management node, and the preset forwarding mapping table includes: the method comprises the steps that a mapping relation between a node transmission channel identifier and a tunnel key value corresponding to a general routing encapsulation GRE tunnel is provided, wherein the node transmission channel identifier is a transmission channel identifier distributed by a management node for each managed node, and the GRE tunnel is a data transmission tunnel between a virtual terminal and a trusted access gateway in the management node;

The transmission module 130 is configured to forward, to the target device, the target data to be transmitted based on the target transmission channel indicated by the target transmission channel identifier.

In an alternative embodiment, the transmission module 130 is specifically configured to forward, based on the target GRE tunnel, the target data to be transmitted to the trusted access gateway through the target virtual terminal if the target transmission channel is the target GRE tunnel;

If the target transmission channel is the transmission channel corresponding to the target managed node, forwarding target data to be transmitted to the target managed node through the target virtual terminal based on the transmission channel corresponding to the target managed node.

In an alternative embodiment, the data communication apparatus further comprises: the building module is used for obtaining the media access layer identification of the managed node;

Creating a virtual terminal according to the media access layer identifier so that the virtual terminal can complete authentication registration, and sending a PDU session establishment request to a trusted access gateway through the virtual terminal so that a GPRS tunnel protocol user plane GTP-U tunnel is established between the trusted access gateway and the UPF through the virtual terminal and a GRE tunnel is established between the trusted access gateway and the virtual terminal;

and establishing a preset forwarding mapping table through the virtual terminal based on the media access layer identifier and the GRE tunnel of the managed node, wherein the virtual terminal supports a non-access layer protocol NAS, an extensible authentication protocol and the GRE protocol.

In an optional embodiment, the establishing module is specifically configured to establish a virtual terminal according to the media access layer identifier, and send a terminal authentication request to the trusted access gateway through the virtual terminal, so that the terminal authentication request is forwarded to the AMF network element through the trusted access gateway, where the terminal authentication request includes an international mobile equipment identifier of the virtual terminal;

receiving an authentication registration success message sent by an AMF network element forwarded by a trusted access gateway through a virtual UE;

And sending a PDU session establishment request to the trusted access gateway through the virtual terminal based on the next generation access and mobile NGAP protocol according to the authentication registration success message.

In an alternative embodiment, the control flow is transmitted between the management node and the trusted access gateway based on an authentication authorization accounting protocol; the virtual terminal in the management node and the trusted access gateway transmit control flow based on an extensible authentication protocol; the control flow is transmitted between the virtual UE and the AMF in the management node based on a non-access stratum protocol NAS; the control flow is transmitted between the trusted access gateway and the AMF based on the NGAP protocol.

In an alternative embodiment, the virtual terminal in the management node and the trusted access gateway transmit the service data stream based on the GRE protocol, and the trusted access gateway and the AMF transmit the service data stream based on the GTP-U protocol.

In an alternative embodiment, the management node is in wireless communication connection with at least one managed node via a first interface based on a star flash protocol.

The foregoing apparatus is used for executing the method provided in the foregoing embodiment, and its implementation principle and technical effects are similar, and are not described herein again.

The above modules may be one or more integrated circuits configured to implement the above methods, for example: one or more Application SPECIFIC INTEGRATED Circuits (ASIC), or one or more microprocessors, or one or more field programmable gate arrays (Field Programmable GATE ARRAY FPGA), etc. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device may be integrated in the data communication apparatus. As shown in fig. 8, the electronic device may include: processor 210, storage medium 220, and bus 230, storage medium 220 storing machine-readable instructions executable by processor 210, processor 210 executing machine-readable instructions to perform steps of the method embodiments described above when the electronic device is operating, processor 210 communicating with storage medium 220 via bus 230. The specific implementation manner and the technical effect are similar, and are not repeated here.

Optionally, the present application further provides a storage medium, on which a computer program is stored, which when being executed by a processor performs the steps of the above-described method embodiments. The specific implementation manner and the technical effect are similar, and are not repeated here.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.

The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform part of the steps of the methods of the embodiments of the application. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A data communication method, wherein the method is applied to a management node, the management node is in wireless communication connection with at least one managed node through a first interface, and is in communication connection with a trusted access gateway through a second interface and a third interface, the trusted access gateway is in communication connection with an access and mobility management function AMF network element and a user plane function UPF network element in a communication system, the management node is configured to include at least one virtual terminal, and each virtual terminal is in communication connection with the AMF network element through an N1 interface, the method comprises:

Acquiring target data to be transmitted;

Inquiring and acquiring a target transmission channel identifier corresponding to the target data to be transmitted based on a preset forwarding mapping table, wherein the preset forwarding mapping table is created through a virtual terminal in the management node, and the preset forwarding mapping table comprises: the method comprises the steps that a mapping relation between a node transmission channel identifier and a tunnel key value corresponding to a generic routing encapsulation GRE tunnel is provided, wherein the node transmission channel identifier is a transmission channel identifier distributed by the management node for each managed node, and the GRE tunnel is a data transmission tunnel between the virtual terminal and the trusted access gateway;

and forwarding the target data to be transmitted to target equipment based on the target transmission channel indicated by the target transmission channel identification.

2. The method of claim 1, wherein forwarding the target data to be transmitted to a target device based on the target transmission channel indicated by the target transmission channel identification, comprises:

If the target transmission channel is a target GRE tunnel, forwarding the target data to be transmitted to the trusted access gateway through a target virtual terminal based on the target GRE tunnel;

And if the target transmission channel is the transmission channel corresponding to the target managed node, forwarding the target data to be transmitted to the target managed node through a target virtual terminal based on the transmission channel corresponding to the target managed node.

3. The method according to claim 1, wherein the method further comprises:

acquiring a media access layer identifier of the managed node;

Creating a virtual terminal according to the media access layer identifier so that the virtual terminal can finish authentication registration, and sending a PDU session establishment request to the trusted access gateway through the virtual terminal so that a GPRS tunneling protocol user plane GTP-U tunnel is established between the trusted access gateway and UPF through the virtual terminal and a GRE tunnel is established between the trusted access gateway and the virtual terminal;

And establishing the preset forwarding mapping table through the virtual terminal based on the media access layer identifier of the managed node and the GRE tunnel, wherein the virtual terminal supports a non-access layer protocol NAS, an extensible authentication protocol and the GRE protocol.

4. The method of claim 3, wherein creating a virtual terminal from the media access layer identification to cause the virtual terminal to complete authentication registration and sending a PDU session establishment request to the trusted access gateway through the virtual terminal comprises:

Creating a virtual terminal UE according to the media access layer identifier, and sending a terminal authentication request to the trusted access gateway through the virtual terminal so as to forward the terminal authentication request to the AMF network element through the trusted access gateway, wherein the terminal authentication request comprises an international mobile equipment identification code of the virtual terminal;

Receiving an authentication registration success message sent by the AMF network element forwarded by the trusted access gateway through the virtual UE;

And sending a PDU session establishment request to the trusted access gateway through the virtual terminal based on the next generation access and mobile NGAP protocol according to the authentication registration success message.

5. The method according to claim 1, wherein a control flow is transmitted between the management node and the trusted access gateway based on an authentication authorization accounting protocol; transmitting a control flow between a virtual terminal in the management node and the trusted access gateway based on an extensible authentication protocol; the control flow is transmitted between the virtual UE and the AMF in the management node based on a non-access stratum protocol NAS; and the control flow is transmitted between the trusted access gateway and the AMF based on an NGAP protocol.

6. The method of claim 1, wherein the traffic data stream is transmitted between the virtual terminal in the management node and the trusted access gateway based on GRE protocol, and wherein the traffic data stream is transmitted between the trusted access gateway and the AMF based on GTP-U protocol.

7. The method of claim 1, wherein the management node is in wireless communication connection with at least one managed node via a first interface based on a star flash protocol.

8. A data communication apparatus, the apparatus being applied to a management node, the management node being in wireless communication connection with at least one managed node through a first interface, and being in communication connection with a trusted access gateway through a second interface and a third interface, respectively, the trusted access gateway being in communication connection with an access and mobility management function AMF network element and a user plane function UPF network element in a communication system, respectively, the management node being configured to include at least one virtual terminal, and each of the virtual terminals being in communication connection with the AMF network element through an N1 interface, the apparatus comprising:

The acquisition module is used for acquiring target data to be transmitted;

The query module is configured to query and obtain a target transmission channel identifier corresponding to the target data to be transmitted based on a preset forwarding mapping table, where the preset forwarding mapping table is created by a virtual terminal in the management node, and the preset forwarding mapping table includes: the method comprises the steps that a mapping relation between a node transmission channel identifier and a tunnel key value corresponding to a general routing encapsulation GRE tunnel is provided, wherein the node transmission channel identifier is a transmission channel identifier distributed by a management node for each managed node, and the GRE tunnel is a data transmission tunnel between a virtual terminal in the management node and the trusted access gateway;

and the transmission module is used for forwarding the target data to be transmitted to target equipment based on the target transmission channel indicated by the target transmission channel identification.

9. An electronic device, comprising: a processor, a storage medium and a bus, the storage medium storing machine-readable instructions executable by the processor, the processor and the storage medium communicating over the bus when the electronic device is running, the processor executing the machine-readable instructions to perform the steps of the data communication method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the data communication method according to any of claims 1-7.