CN115119287B

CN115119287B - Communication network, internet of vehicles, terminal equipment access method, equipment and storage medium

Info

Publication number: CN115119287B
Application number: CN202210761290.6A
Authority: CN
Inventors: 郝文杰; 王超; 石磊
Original assignee: Alibaba China Co Ltd
Current assignee: Alibaba China Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2024-03-26
Anticipated expiration: 2042-06-29
Also published as: CN115119287A

Abstract

The embodiment of the invention provides a communication network, a vehicle networking and terminal equipment access method, equipment and a storage medium, wherein the network comprises the following components: user plane function network elements with the same service range, edge function network elements and terminal equipment within the service range. And the edge function network element realizes the network access of the terminal equipment according to the access information and obtains an access result. The access result comprises the registration state of the terminal equipment and the first link attribute of the target transmission link established in the access process. And then, the user plane function network element realizes data packet forwarding by using the target transmission link with the first link attribute. Therefore, in the above access process, since the user plane function network element and the edge function network element have the same service range, and the terminal device is also located in the service range, signaling generated by the terminal device and the function network element in the access process can be transmitted to each other in time, so that the response speed of the signaling is improved, and the rapid access of the terminal device is realized.

Description

Communication network, internet of vehicles, terminal equipment access method, equipment and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a storage medium for accessing a communication network, an internet of vehicles, and a terminal device.

Background

With the continuous development of the fifth generation mobile communication technology (5 th Generation Mobile Communication Technology, abbreviated as 5G), the 5G communication system has been applied to various fields. For example, for different Application programs (APP) on the terminal device, which can provide different services for the user, a better service experience can be provided for the user by means of the 5G communication network. For example, the vehicle, the drive test equipment and the 5G communication network can form an internet of vehicles, and better automatic driving experience can be provided for a driver by means of the internet of vehicles.

It is easy to understand that the terminal device needs to access the 5G communication system first to use the different services no matter what kind of service is used. The access of the terminal equipment is generally controlled by a control plane function network element contained in a core network in the communication network, that is, the control plane function network element responds to an access signaling sent by the terminal equipment to realize the access of the terminal equipment. In the actual access process, the control plane function network element often has the condition of untimely response of the access signaling, affects the access speed of the terminal equipment, and finally leads the terminal equipment to be incapable of timely using the service.

Therefore, how to realize the quick access of the terminal device is a urgent problem to be solved.

Disclosure of Invention

In view of the above, the embodiments of the present invention provide a communication network, a vehicle networking, a terminal device access method, a device and a storage medium, so as to implement quick access of a terminal device.

In a first aspect, an embodiment of the present invention provides a communication network, including: user plane function network elements and edge function network elements with the same service range and terminal equipment within the service range;

the edge function network element is configured to control, according to first access information of the terminal device, the legal terminal device to access to the communication network, so as to obtain an access result, where the access result includes a registration state of the terminal device and a first link attribute of a target transmission link established in an access process;

and the user plane function network element is used for forwarding the data packet generated by the terminal equipment by utilizing the target transmission link with the first link attribute if the registration state in the access result is that the registration is successful.

In a second aspect, an embodiment of the present invention provides an internet of vehicles, including: user plane function network elements and edge function network elements with the same service range and vehicles within the service range;

The edge function network element is used for controlling a legal vehicle to access the communication network according to the first access information of the vehicle so as to obtain an access result, wherein the access result comprises a registration state of the vehicle and a first link attribute of a target transmission link established in an access process;

and the user plane function network element is used for forwarding driving data generated by the vehicle by utilizing a target transmission link with a first link attribute if the registration state in the access result is successful.

In a third aspect, an embodiment of the present invention provides a communication network, including: the system comprises a wireless access network, user plane function network elements and edge function network elements with the same service range, terminal equipment in the service range and control plane function network elements with the service range larger than that of the user plane function network elements;

the wireless access network is used for forwarding the access signaling generated by the terminal equipment to the edge function network element;

the edge function network element is configured to obtain first access information of the terminal device in response to the access signaling; controlling legal terminal equipment to access the communication network according to the first access information to obtain an access result, wherein the access result comprises a registration state of the terminal equipment and a first link attribute of a target transmission link established in an access process; sending the access result to the control plane function network element and the user plane function network element;

The control plane functional network element is configured to modify the access result according to second access information reflecting the access requirement of the terminal device, where the modified access result includes a registration state of the terminal device and a second link attribute of the target transmission link; sending the corrected access result to the user plane function network element;

the user plane function network element is used for responding to the receiving of the access result and forwarding the data packet generated by the terminal equipment by utilizing a target transmission link with a first link attribute; and forwarding the data packet according to the target transmission link with the second link attribute in response to the receiving of the modified access result.

In a fourth aspect, an embodiment of the present invention provides a terminal device access method, which is applied to an edge function network element having the same service range as a user plane function network element in a communication network, including:

controlling terminal equipment in the service range to access the communication network according to the access information so as to obtain the registration state of the terminal equipment;

if the registration state is successful, establishing a target transmission link according to the access information;

and transmitting the link attribute of the target transmission link to the user plane function network element so that the user plane function network element forwards the data packet generated by the terminal equipment by utilizing the target transmission link with the link attribute.

In a fifth aspect, an embodiment of the present invention provides an electronic device, including a processor and a memory, where the memory is configured to store one or more computer instructions, and the one or more computer instructions when executed by the processor implement the terminal device access method in the fourth aspect. The electronic device may also include a communication interface for communicating with other devices or communication networks.

In a sixth aspect, embodiments of the present invention provide a non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to at least implement a terminal device access method as described in the fourth aspect.

The communication network provided by the embodiment of the invention comprises the user plane function network elements with the same service range, the edge function network elements and the terminal equipment within the service range, wherein the function network elements are positioned in the core network of the communication network.

Based on the network, the edge function network element can realize legal terminal equipment network access according to the access information so as to obtain an access result. Since the access of the terminal device may include a device registration and session establishment procedure, the obtained access result may include a registration state and a target transmission link obtained after session establishment and a link attribute of the link. And then, the user plane function network element with the same service range as the edge function network element can utilize the target transmission link to realize the forwarding of the data packet.

Therefore, when the network is used for realizing the access of the terminal equipment, the user plane functional network element and the edge functional network element have the same service range, and the terminal equipment is also positioned in the service range, so that signaling generated by the terminal equipment and the functional network element in the access process can be transmitted to the other party in time, the response speed of the signaling is improved, and the rapid access of the terminal equipment is finally realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a communication network that may be implemented;

fig. 2 is a diagram of a core network architecture in the communication network shown in fig. 1;

fig. 3 is a schematic structural diagram of a communication network according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another communication network according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of another communication network according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another communication network according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an access procedure of a terminal device according to an embodiment of the present invention;

fig. 8 is a signaling diagram of terminal equipment access provided in an embodiment of the present invention;

fig. 9 is a schematic structural diagram of still another communication network according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an internet of vehicles according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a communication network and a car networking application provided in an embodiment of the present invention in an automatic driving scenario;

fig. 12 is a schematic diagram of a communication network application provided in an embodiment of the present invention in a live broadcast scenario;

fig. 13 is a flowchart of a terminal device access method provided in an embodiment of the present invention;

fig. 14 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to an identification", depending on the context. Similarly, the phrase "if determined" or "if identified (stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when identified (stated condition or event)" or "in response to an identification (stated condition or event), depending on the context.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the case where there is no conflict between the embodiments, the following embodiments and features in the embodiments may be combined with each other. In addition, the sequence of steps in the method embodiments described below is only an example and is not strictly limited. And before describing in detail the communication system and the terminal device access method provided by the embodiments of the present invention, a description of a common access procedure may be provided.

Fig. 1 is a schematic diagram of a communication Network that may be implemented, and may specifically include a radio access Network (Radio Access Network, RAN for short), a core Network, and a Data Network (DN for short). The terminal Equipment, namely User Equipment (UE) can access to the core network by means of the radio access network, and further realize bidirectional data interaction with the data network.

Alternatively, the network architecture of the core network in the communication network shown in fig. 1 may be as shown in fig. 2. The core network may include: a network slice selection function (Network Slice Selection Function, NSSF) network element, a network exposure function (Network Exposure Function, NEF) network element, a network repository function (Network Repository Function, NRF) network element, a policy control function (Policy Control Function, PCF) network element, a unified data management (Unified Data Management, UDM) network element, an authentication service function (Authentication Server Function, AUSF) network element, an access and mobility management function (Access and Mobility Management Function, AMF) network element, a session management function (Session Management Function, SMF) network element, and a mobility management function (Mobility Management Function, MMF) network element. The above network elements may be referred to as control plane function network elements (Control Plane Function, CPF for short). The core network may also include a user plane function (User Plane Function, UPF for short) network element.

The AMF network element and the SMF network element in the CPF network element are used for realizing the access of the terminal equipment. Specifically, the AMF network element responds to the access signaling generated by the terminal device, and determines validity of the terminal device to complete registration of the legal terminal device. And the SMF network element establishes session connection for the terminal equipment which is successfully registered, so as to finally realize the access of the terminal equipment. After the terminal equipment is accessed, for the data packet generated by the terminal equipment or a server in the data network, the UPF network element in the core network forwards the data packet by using a transmission link obtained in the process of establishing session connection so as to realize data interaction between the terminal equipment and the data network.

It should be noted that, the transmission link established by the SMF network element for the terminal device in this embodiment and the embodiments described below may also be referred to as a tunnel, and the data interaction between the terminal device and the data network is implemented by using the tunnel.

However, each functional network element included in the core network in the communication network is often deployed in a centralized manner, that is, the CPF and the UPF in the core network may be deployed in the same area, so that the CPF network element located in the area may centrally receive and centrally process various signaling generated in the access process of the terminal in the area and other areas, and the UPF network element may centrally receive and centrally forward data packets generated when the terminal device in the area and other areas performs data interaction with the data network after access. The centralized processing manner of the signaling or the data packet can cause a high data processing pressure of each functional network element in the core network, and meanwhile, the transmission of the signaling between the terminal equipment and the CPF network element and the transmission of the data packet between the terminal equipment and the UPF network element can be quite time-consuming. When the network between the terminal equipment and the core network is unstable, signaling and data packet transmission are more time-consuming, so that the access of the terminal equipment and the timeliness of data interaction between the terminal equipment and the data network are reduced. In a more serious case, when the network between the terminal device and the core network is disconnected, the terminal device fails to access or fails to transmit data.

In order to improve the above problem, fig. 3 is a schematic structural diagram of a communication network according to an embodiment of the present invention. The communication network includes: user plane function network elements with the same service range, edge function network elements and terminal equipment in the service range. For simplifying the following description, the user plane function network element may be simply referred to as a UPF network element, and the edge function network element may be simply referred to as an edge network element. And both the edge network element and the UPF network element are located in the core network of the communication network.

The operation of the communication network can be described as: and the edge network element responds to the access signaling sent by the terminal equipment and realizes that the legal terminal equipment accesses the communication network according to the first access information, thereby obtaining an access result. Alternatively, the first access information may comprise a data network name (Data Network Name, DNN for short) indicating the name of the data network the terminal device is allowed to access.

As described above, the access of the terminal device may include two phases of device registration and session establishment, and thus, the access result obtained by the edge network element may include the registration state of the terminal device and the link attribute of the target transmission link established by the edge network element for the terminal device during the access. The registration status of the terminal device may include registration success or registration failure. It is easy to understand that the link attribute of the target transmission link may be included in the access result only when the registration status is registration success. Alternatively, the link attributes may include bandwidth, delay, packet loss rate, etc. of the link. Since the transmission link may also be referred to as a tunnel, the link attribute may also be referred to as a tunnel attribute.

After the terminal equipment is successfully accessed, the edge network element can further send the link attribute to the UPF network element. The UPF network element can allocate network resources in the communication network for the target transmission link according to the link attribute, so that the UPF network element forwards the data packet by using the target transmission link to realize data interaction between the terminal equipment and the data network. Note that, the UPF network elements in this embodiment and the following embodiments are the same as the UPF network elements in the core network architecture shown in fig. 2.

For the data packet forwarded by the UPF network element, the data content of the data packet is closely related to the usage scenario. Optionally, in the live broadcast scene, the terminal device may be a mobile phone, a computer, or other devices used by a user, the server may be a live broadcast server storing live broadcast video, and the data packet may be a data acquisition request sent by the terminal device, or may be live broadcast video stored by the live broadcast server. The live video can be live video of a sports event or a game, or live video for realizing remote education and remote medical treatment. Alternatively, in an autopilot scenario, the terminal device may be a vehicle with autopilot functionality and the server may be a server with path planning functionality. The data packet may be a data acquisition request sent by the vehicle, or may be navigation data obtained by the server in response to the data acquisition request.

It should be noted that, unlike the functional network elements that are centrally deployed in fig. 2, the UPF network elements and the edge network elements mentioned in this embodiment and the embodiments below are distributed deployment. The following can be understood for the distributed deployment of functional network elements: the UPF network element and the edge network element may be disposed in any one of the at least one area, and the area where the UPF network element and the edge network element are disposed may consider a service range of the network element, and each area may also include at least one terminal device. The distributed deployment of the functional network elements can be regarded as the sink deployment of the UPF network elements and the edge network elements to different areas where different terminal devices are located, i.e. the sink deployment of the UPF network elements and the edge network elements from a network center to a network edge. The terminal equipment located in any area can be controlled to be accessed by the edge network element deployed in any area, and then the UPF network element deployed in the area can forward the data packet.

Therefore, according to the distributed deployment mode, on one hand, because the terminal equipment is located in the service range of the edge network element, the network between the terminal equipment and the edge network element is relatively stable, and signaling generated by the terminal equipment and the edge network element in the access process can be timely and smoothly transmitted to the other party, so that the terminal equipment can be ensured to be quickly accessed to the network. On the other hand, because the UPF network element and the edge network element have the same service range, namely the terminal equipment is also in the service range of the UPF network element, after the terminal equipment is successfully accessed, the UPF network element can also rapidly forward the data packet with large data quantity generated by the terminal equipment and a server in the data network, so that the use experience of a user is ensured.

In this embodiment, an edge network element in the communication network is configured to implement legal network access of the terminal device according to the first access information of the terminal device, so as to obtain an access result, where the obtained access result may include a registration state, a target transmission link obtained after session establishment, and a link attribute of the link. And then, the UPF network element with the same service range as the edge network element can reuse the target transmission link to realize the forwarding of the data packet.

Because the edge network element and the UPF network element which are distributed and deployed have the same service range, and the terminal equipment is also positioned in the service range, signaling generated by the terminal equipment and each functional network element can be transmitted to the other party in time in the access process, so that the transmission speed and the response speed of the signaling are improved, and the rapid access of the terminal equipment is finally realized. And after the access, the data packet generated by the terminal equipment in the service range of the UPF network element can be efficiently forwarded by the UPF network element, so that the use experience of a user is ensured.

In the embodiment shown in fig. 3, the legal terminal device can perform data interaction with the data network after accessing the network. However, considering the data security problem in the interaction process, optionally, different access policies may be set for the terminal device, and the registration of the terminal device may be controlled according to the access policies. And finally, the terminal equipment which is legal and meets the access policy can successfully access the network. Wherein the access policy may be set by an operator of the communication network.

Alternatively, the access policy may relate to the access location of the terminal device and/or the access time of the terminal device. For example, the access policy may be that no terminal device registration is allowed within a preset area and/or for a preset period of time. Such as disallowing registration of terminal devices in a data center in an industrial park; while other areas within the campus allow the terminal device to register. Also, for example, during the working period, the terminal equipment in the campus is not allowed to register, and during the non-working period, the terminal equipment in the industrial campus is allowed to register.

In addition, besides the access policy, different requirements of different users on the use experience (such as fluency and/or definition of live broadcast data) are considered, namely, different requirements of the terminal equipment on the data transmission performance are considered, optionally, different performance indexes can be set for different terminal equipment, and a target transmission link with the performance indexes meeting the requirements is established for the terminal equipment, so that the access of the terminal equipment is finally realized. Specifically, the higher the level of the terminal device, the higher the hardware configuration, and the higher the performance requirement of the terminal device on data transmission, i.e. the higher the bandwidth, delay and packet loss rate requirements of the transmission link of the data packet by the terminal device. Wherein the class of the terminal device may correspond to a package used by the terminal device.

The above access policy and the requirement of the terminal device for data transmission performance can be considered as the access requirement of the terminal device. In order to ensure data security and user experience at the same time, the edge network element distributed in the communication network shown in fig. 3 needs to use the above access requirement to realize the access of the terminal device after determining that the terminal device is legal.

Specifically, the edge network element may first determine whether the terminal device is legal. If the terminal equipment is legal, determining whether the terminal equipment can be registered according to the access strategy in the access requirement. Then, for the successfully registered terminal equipment, the edge network element establishes a target transmission link meeting the requirement according to the requirement of the terminal equipment on the data transmission performance, and the terminal equipment is accessed at the moment.

In the above access process, the operations performed by the edge network elements deployed in a distributed manner are the same as the AMF network elements and the SMF network elements deployed in a centralized manner in the core network architecture shown in fig. 2, and then the edge network elements may also be considered to integrate all functions of the AMF network elements and the SMF network elements. The distributed deployment of the edge network element integrated with all functions of the AMF network element and the SMF network element may result in a significant increase in deployment cost. The edge network element needs to perform multiple judgment on the validity and the access policy of the terminal equipment, and the terminal equipment can be accessed after a transmission link meeting the data transmission performance requirement of the terminal equipment is established.

Thus, fig. 4 is a schematic structural diagram of another communication network according to an embodiment of the present invention, in view of comprehensive consideration of deployment cost and access speed. The communication network includes: a UPF network element and an edge network element having the same service range, a terminal device in the service range, and a control plane function network element (CPF network element for short).

The edge network element may be distributed, which has a validity verification function and a transmission link establishment function, that is, a part of functions in the AMF network element and the SMF network element in the core network shown in fig. 2 are integrated into the edge network element. The CPF network element may be centrally deployed for determining again whether the terminal device is capable of registering according to the access policy and establishing a transmission link for the terminal device that meets the data transmission performance requirements. The service range of the CPF network element is larger than that of the edge network element.

The operation of the communication network shown in fig. 4 can be described as: and the distributed deployed edge network element responds to the access signaling sent by the terminal equipment, and controls the legal terminal equipment to initially access the communication network according to the first access information so as to obtain an access result. The access result may be further transmitted to the CPF network element. The access result may include an access state of the terminal device and a first link attribute of the target transmission link. Alternatively, the first link attribute may include a bandwidth, delay, packet loss rate, etc. of the link.

After the legal terminal equipment is successfully accessed, the edge network element can send the first link attribute to the UPF network element. The UPF network element can allocate network resources in the communication network for the target transmission link according to the first link attribute, so that the UPF network element can forward the data packet by using the target transmission link with the first link attribute to realize data interaction between the terminal equipment and the data network. At this point, the preliminary access of the terminal device has been achieved with the distributed deployment of the edge network elements. The first link attribute may be preset, which may not meet the requirement of the terminal device on the data transmission performance, but the target transmission link with the first link attribute is used to at least realize the transmission of the data packet, that is, ensure the basic data transmission between the terminal device and the data network.

It should be noted that, the sending of the access result and the data packet transmission by the UPF using the target transmission link with the first link attribute may not have strict precedence restrictions.

Furthermore, considering the data security and the requirements of the terminal equipment on the data transmission performance, the CPF network element deployed in a centralized manner can also correct the received access result according to the second access information, that is, correct the registration state and the first link attribute of the target transmission link, so as to complete the final access of the terminal equipment. The modified access result may include an access state of the terminal device and the second link attribute. And the second link attribute is such that it meets the requirements of the terminal device for data transmission performance. After the correction is completed, the UPF network element can continue to forward the data packet by using the target transmission link with the second link attribute.

In this embodiment, the access of the terminal device is divided into two phases, in the first phase, the edge network element distributed in the communication system judges the validity of the terminal device, so as to realize the registration of the legal terminal device, and then a target transmission link with a general link attribute (i.e., a first link attribute) is established for the terminal device which completes the registration, thereby realizing the rapid access of the terminal device. At this time, the legal terminal device has been initially accessed to the communication network, and the UPF network element may forward the data packet between the terminal device and the data network by using the target transmission link having the first link attribute, so as to implement data interaction between the terminal device and the data network.

In the second stage, the CPF network element deployed in a centralized manner in the communication system can modify the registration state of the terminal device according to the access policy of the terminal device. For the terminal equipment which is successfully registered, the CPF network element can also correct the link attribute of the target transmission link to be a second link attribute meeting the requirement according to the requirement of the terminal equipment on the data transmission performance. And then, the UPF network element can also forward the data packet between the terminal equipment and the data network by utilizing the target transmission link with the second link attribute, and the forwarding speed of the data packet meets the requirement of the terminal equipment on the data transmission performance, thereby ensuring the use experience of a user.

And after the preliminary access is realized by means of the edge network element, the terminal equipment can utilize the target transmission link with the first link attribute to realize the data interaction with the data network. Even if the network between the terminal equipment and the centrally deployed CPF network element is unstable and even disconnected, the interaction between the terminal equipment and the data network is not affected. It can be seen that the use of an edge network element can reduce the impact of network instability on the normal access of the terminal device. After the network environment is stable, the CPF network element can further correct the access result sent by the edge network element to finally obtain the target transmission link with the second link attribute, and the interaction between the CPF network element and the data network is realized by using the link.

As can be seen from the embodiment shown in fig. 4, the operation of the edge network element in the distributed deployment is used to implement the preliminary access of the terminal device according to the first access information, and thus the operation of the edge network element can be described in detail according to the embodiment shown in fig. 5.

Fig. 5 is a schematic structural diagram of another communication network according to an embodiment of the present invention. The communication network includes: terminal equipment, UPF network element, edge network element, access equipment and CPF network element.

Wherein both the edge network element and the CPF network element can be considered as network elements comprised by the core network in the communication network. And according to the above description, the edge network element integrates the validity verification function of the AMF network element and the transmission link establishment function of the SMF network element, and the corresponding edge network element may specifically include an access and mobility management function sub-network element, a session management function sub-network element and a unified data management function sub-network element. For simplicity of the following description, the access and mobility management function sub-network element may be referred to as a miniSMF sub-network element, the session management function sub-network element may be referred to as a miniSMF sub-network element, and the unified data management function sub-network element may be referred to as a minisdm sub-network element.

Optionally, the first access information may include DNN corresponding to the terminal device, and the working process of the miniAMF subnet element may be: first, a first corresponding relation between the terminal equipment and DNNs which the terminal equipment is allowed to access is acquired, and the first DNNs which the terminal equipment is allowed to access are determined according to the first corresponding relation. And then, responding to the registration signaling sent by the terminal equipment, and acquiring a second DNN contained in the registration signaling. If the first DNN and the second DNN are the same, determining that the terminal equipment is legal, and controlling the terminal equipment to finish registration by the miniAMF sub-network element. At this time, the miniAMF sub-network element completes authentication of the terminal device.

Optionally, the first access information may further include an access location of the terminal device, and the miniSMF subnet working procedure may be: and selecting access equipment for the terminal equipment nearby in a wireless access network of the communication network according to the access position of the terminal equipment, and informing each network address of the access equipment and the UPF network element to the other party so as to establish a target transmission link with a first link attribute between the access equipment and the UPF network element. Alternatively, the access device is typically a 5G base station (i.e., a gNB). Different interfaces, namely an N3 interface and an N2 interface shown in fig. 5, are respectively arranged between the access device and the UPF network element and between the access device and the edge network element. In addition, tunnel endpoint identifiers (Tunnel End Point identifier, abbreviated as TEIDs) corresponding to the terminal devices are also stored in the access device and the SMF network element, and the access device is configured to forward the data packet to the corresponding terminal device according to the TEIDs.

In addition, in order to miniSMF sub-network elements, network addresses are allocated to the terminal devices, so that the terminal devices can realize data interaction with the data network according to the allocated network addresses. Thus, optionally, the first access information further includes a network address type supported by the terminal device, and the process of assigning a network address may be: firstly, a second corresponding relation between the terminal equipment and the network address type supported by the terminal equipment is acquired, and the first network address type supported by the terminal equipment is determined according to the second corresponding relation. And then, responding to the session establishment signaling sent by the terminal equipment, and acquiring a second network address type contained in the session establishment signaling. If the first network address type and the second network address type are the same, network addresses with the first network address type or the second network address type are allocated to the terminal equipment. The terminal device may use this network address to send data packets. Optionally, the network address types may include IPv4 (Internet Protocol version 4) and/or IPv6 (Internet Protocol version). The above-described process of assigning addresses may also be considered as a sub-process in the session establishment process.

The first correspondence and the second correspondence may be stored in the minisdm sub-network element as subscription data of the terminal device, that is, a part of subscription data stored in the UDM network element in the core network is migrated to the minisdm sub-network element, and other subscription data in the UDM network element is still stored in the UDM network element.

In this embodiment, the first access information may include DNN of the terminal device, a network address type supported by the terminal device, and an access location of the terminal device, which are all information required for implementing preliminary access of the terminal device. Each sub-network element in the edge network element can use the corresponding information in the first access information to realize the preliminary access of the terminal equipment, thereby ensuring the access speed of the terminal equipment. After the primary access, the terminal equipment can realize data interaction with the data network, namely, basic data service is provided for the user.

In addition, the details of the embodiment and the technical effects that can be achieved are also referred to the related descriptions in the above embodiments, and are not described herein.

As can be seen from the embodiment shown in fig. 4, the CPF network element is configured to implement final access of the terminal device according to the second access information. The operation of the CPF network element can be described in detail according to the embodiment shown in fig. 6.

Fig. 6 is a schematic structural diagram of another communication network according to an embodiment of the present invention, based on the embodiment shown in fig. 5. The communication network includes: terminal equipment, UPF network element, edge network element, access equipment and CPF network element. The edge network element can comprise a minisize sub-network element, a minisize sub-network element and a system minisize sub-network element; the CPF network elements may include AMF network elements, SMF network elements, and UDM network elements.

Optionally, the second access information may include an access policy corresponding to the terminal device, and the operation of the AMF network element may be: and modifying the registration state in the access result according to the access strategy. For details of the access policy, reference may be made to the above description. The registration state in the access result may be sent to the AMF network element by the miniAMF sub-network element according to a first preset interface (i.e. the N2' interface in the figure) between itself and the AMF network element.

Optionally, the second access information may further include: i.e. the requirements of the terminal device for data transmission performance, the working process of the SMF network element may be: if the registration state in the corrected access result is still successful in registration, according to the requirement of the terminal equipment on the data transmission performance, the link attribute of the target transmission link is adjusted from the first link attribute to the second link attribute, and the second link attribute is sent to the UPF network element. The UPF network element may allocate network resources in the communication network for the target transmission link according to the second link attribute such that the target transmission link having the second link attribute is obtained. The first link attribute in the access result may be sent to the SMF network element by the miniSMF sub-network element according to a second preset interface (i.e., an N8' interface in the figure) between itself and the SMF network element.

Optionally, the miniUDM sub-network element may obtain the first correspondence and the second correspondence used in the preliminary access process from the UDM network element according to a third preset interface (i.e., an N8' interface in the figure) between the miniUDM sub-network element and the UDM network element. The access policy used by the CPF network element when modifying the access result and the requirements of the terminal device for data transmission performance may also be stored in the UDM network element.

In this embodiment, the second access information may include an access policy and a requirement of the terminal device for data transmission performance, which are information required for realizing the final access of the terminal device. And each sub-network element in the CPF network element uses the corresponding information in the second access information to correct the access result generated after the preliminary access, and realizes the final access of the terminal equipment according to the corrected access result. After the final access is finished, the terminal equipment can realize data interaction with the data network on the basis of ensuring the data security, and the data transmission performance also meets the requirements, so that the use experience of a user is ensured.

In summary, in the communication network, the edge network element may be used to implement preliminary network access of the terminal device, so as to obtain the access result corresponding to the preliminary network access while implementing quick access of the terminal device. The terminal device is already able to interact with the normal data of the data network after the preliminary access. In order to improve the experience of data interaction, the edge network element can send the access result corresponding to the preliminary network access to the CPF network element. The CPF network element can further correct the access result and realize the final network access of the terminal equipment according to the corrected result. The above-described process of "preliminary network access-access result transmission-correction of access result and final network access" can also be understood in conjunction with fig. 7.

In the embodiments shown in fig. 4 to 7, the access procedure of the terminal device may also be understood in conjunction with the signaling diagram shown in fig. 8. In the signaling diagram, after the edge network element finishes registration by using the first access information, the registration state in the access result is directly sent to the CPF network element so as to be corrected by the CPF network element. And after the edge network element establishes a target transmission link with the first link attribute, directly transmitting the first link attribute in the access result to the CPF network element so as to correct the link attribute by the CPF network element.

It should be noted that the transmission and correction sequence shown in the above-described signaling diagram is only an alternative. In practice, optionally, the CPF network element may also perform correction after the registration result and the first link attribute are all sent to the CPF network element. That is, there is no strict sequence between the uploading of the access result and the correction of the access result.

Based on the above embodiments, optionally, edge network elements deployed in different areas may also communicate with each other. And by means of communication between the two, the edge network element can perform a simplified access procedure for re-accessing the terminal device when the location of the terminal device that has accessed the network, i.e. the access location, changes.

Specifically, after the terminal device having successfully accessed the network moves from the area a to the area B, the edge network element which is also deployed in the area a can synchronize the registration state of the terminal device which is successfully registered in the area a to the edge network element in the area B, at this time, the terminal device does not need to register again in the area B, the edge network element in the area B can directly establish a transmission link corresponding to the terminal device in the area B, and the UPF network element in the area B realizes the forwarding of the data packet by means of the transmission link.

Fig. 9 is a schematic structural diagram of another communication network according to an embodiment of the present invention. The network comprises: a radio access network (RAN network element for short), a user plane function network element (UPF network element for short) and an edge function network element (edge network element for short) with the same service range, a terminal device in the service range, and a control plane function network element (CPF network element for short) with the service range larger than the user plane function network element.

The edge network element and the UPF network element adopt a distributed deployment mode, namely, the edge network element and the UPF network element have the same service range, and the CPF network element adopts a centralized deployment mode, namely, the service range of the CPF network element is larger than that of the edge network element and the UPF network element.

The specific working procedure of this communication network is: first, the terminal device may generate access signaling, which may be forwarded to the edge network element by means of the access device in the RAN.

And then, the edge network element responds to the access signaling to acquire first access information of the terminal equipment, and controls the registration of the terminal equipment according to the first access information so as to acquire an access result comprising a registration state and a first link attribute. Wherein the first access information may be included in the access signaling. Further, the edge network element may also send the access result to the CPF network element and the UPF network element in the communication network. The specific working process of the edge network element can be referred to the relevant description in the above embodiments. At this time, the UPF network element may allocate network resources for the target transmission link according to the first link attribute in the access result, and forward the data packet in the target transmission link having the first link attribute.

And then, the CPF network element corrects the access result generated by the edge network element according to the second access information of the terminal equipment, and sends the corrected access result to the UPF network element. Finally, if the modified terminal device still registers successfully, the UPF network element may reallocate network resources for the target transmission link according to the second link attribute in the modified access result, and the UPF network element forwards the data packet in the target transmission link having the second link attribute.

It should be noted that, in this embodiment, the "forwarding of the data packet by the UPF network element in the target transmission link having the first link attribute" and the "modification of the access result by the CPF network element" also do not have strict timing.

In this embodiment, the radio access network receives and forwards an access signaling generated by the terminal device. The edge network element responds to the access signaling, acquires first access information of the terminal equipment, and realizes legal network access of the terminal equipment according to the first access information to obtain an access result, wherein the access result can comprise a registration state, a target transmission link obtained after session establishment and a link attribute of the link. And then, the UPF network element with the same service range as the edge network element can reuse the target transmission link to realize the forwarding of the data packet.

Because the edge network element and the UPF network element which are distributed and deployed have the same service range, and the terminal equipment is also positioned in the service range, signaling generated by the terminal equipment and the functional network element can be transmitted to the other party in time in the access process, so that the transmission speed and the response speed of the signaling are improved, and the rapid access of the terminal equipment is finally realized. And after the access, the data packet generated by the terminal equipment in the service range of the UPF network element can be efficiently forwarded by the UPF network element, so that the use experience of a user is ensured.

In addition, the content of the descriptions not similar to the descriptions in the present embodiment may be referred to the descriptions related to the embodiments described above, and will not be repeated here.

As described in the background, a better autopilot experience can be provided to the user by means of a 5G communication network. For an autopilot scenario, fig. 10 is a schematic structural diagram of an internet of vehicles according to an embodiment of the present invention. This car networking includes: user plane function network elements (UPF for short) with the same service range, edge function network elements (edge network elements for short) and vehicles within the service range.

In the internet of vehicles, the edge network element can control the legal vehicles to access the communication network according to the first access information of the vehicles so as to obtain an access result, wherein the access result comprises the registration state of the vehicles and the first link attribute of the target transmission link established in the access process. When the vehicle registration is successful, the UPF network element may forward the vehicle generated driving data using the target transmission link having the first link attribute.

Alternatively, the vehicle generated driving data may include a data acquisition request sent by the vehicle to a server with path planning and/or driving state control capabilities. In contrast, the navigation data and/or control data generated by the server in response to the request may also be referred to as server-generated driving data, which may also be transmitted by means of the target transmission link. The navigation data comprises data obtained after the server performs path planning, and the control data comprises data which are generated by the server and used for controlling the driving state of the vehicle, such as the speed reduction, the acceleration, the turning and the like of the vehicle.

Optionally, the internet of vehicles may further include a data acquisition device, and the server may generate navigation data and/or control data for the vehicle according to the environmental data acquired by the data acquisition device.

In this embodiment, the edge network element is configured to implement network access of legal terminal devices according to first access information of the vehicle, so as to obtain an access result, where the obtained access result may include a registration state, a target transmission link obtained after session establishment, and a link attribute of the link. And then, the UPF network element with the same service range as the edge network element can reuse the target transmission link to realize the forwarding of driving data.

The edge network element and the UPF network element which are distributed and deployed have the same service range, and the terminal equipment is also positioned in the service range, so that the signaling generated by the terminal equipment and the functional network element can be timely transmitted to the other party in the access process, thereby improving the transmission speed and the response speed of the signaling, and finally realizing the rapid access of the terminal equipment. And after the access, the data packet generated by the terminal equipment can be efficiently forwarded by the UPF network element which is positioned in the same area with the terminal equipment, so that the use experience of the user is ensured.

Optionally, the internet of vehicles may further include a CPF network element. The CPF network element is used for correcting the registration state of the vehicle and the link attribute of the target transmission link. For specific modifications, reference may be made to the relevant descriptions in the embodiments described above.

With the above networks, the terminal device can access the communication network and use different services. The specific working processes of the communication network and the internet of vehicles provided above may be exemplarily described in connection with an autopilot scenario for ease of understanding. The following can be understood in conjunction with fig. 11.

In an autopilot scenario, when a vehicle is connected to a communication network and in autopilot mode, it may interact with data from a server in the data network having path planning and/or driving state control capabilities. Based on this, the access procedure of the vehicle can be described as:

The vehicle may generate and send registration signaling to the RAN in the communication network, which is then forwarded by the RAN to an edge network element in the communication network core network. The edge network element may specifically include a minism sub-network element, and a minisdm sub-network element, and specific content of the first corresponding relationship and the second corresponding relationship in the record in the minisdm sub-network element may be referred to the related description in the foregoing embodiment.

The registration signaling generated by the vehicle may be sent to the miniAMF sub-network element in the edge network element and the registration signaling may include a second DNN to which the vehicle is allowed access. Then, the miniAMF sub-network element can inquire a first DNN which is allowed to be accessed by the vehicle from the first corresponding relation recorded in the miniUDM sub-network element. If the first DNN is different from the second DNN in the registration signaling, determining that the vehicle is illegal and the vehicle access is failed. At this time, a prompt message indicating the access failure may be transmitted to the vehicle. If the first DNN is the same as the second DNN in the registration signaling, determining that the vehicle is legal and the vehicle registration is successful.

For a vehicle that is successfully registered, further, the vehicle may also send a session establishment signaling to the miniSMF subnet element, where the session establishment signaling may include a second network address type supported by the vehicle. The miniSMF subnet element may query the first network address type supported by the vehicle from the second correspondence recorded in the miniUDM subnet element. If the type of the queried first network address is different from the type of the second network address in the signaling, the vehicle access fails, and prompt information is sent to the vehicle. If the type of the queried first network address is the same as the type of the second network address in the signaling, the network address is allocated to the vehicle according to the type of the network address, and the vehicle is used for sending the data packet to the server according to the network address.

Then, in response to the session establishment signaling, the miniSMF sub-network element may further select an access device for the vehicle according to the access position of the vehicle in the signaling, and establish a target transmission link between the access device and the vehicle, where a link attribute of the target transmission link is a preset value, that is, the first link attribute in the foregoing embodiments. The UPF network element can allocate network resources to the target transmission link according to the first link attribute, so that driving data generated by the vehicle and the server respectively can be transmitted in two directions through the target transmission link with the first link attribute.

The vehicle has thus far completed a preliminary access, and the target transmission link with the first link attribute is able to transmit the driving data generated by the server for the user. Wherein the first link attribute may be a bandwidth of 3M and a latency of 20 ms.

In practice, when the driver is unfamiliar with the road, the driver has a higher requirement on the timeliness of the driving data acquisition, for example, the driver may have a bandwidth of 3M and a delay of 10ms (i.e., the second link attribute in the above embodiments), and at this time, the first link attribute obviously does not meet the driver requirement. The CPF network element in the communication network may be further used to modify the first link attribute to a second link attribute. The correction process is specifically performed by an SMF network element of the CPF network elements, so as to achieve final access of the vehicle. The first link attribute and the second link attribute may be stored as subscription data in the miniUDM subnet element.

The UPF network element may then allocate resources for the target transmission link according to the second link attribute to transmit driving data in the target transmission link having the second link attribute.

In practice, optionally, there is also a scenario where data security is required, where the AMF network element in the CPF network element is also used to correct the registration status of the vehicle. If the position of the vehicle and the time for sending the registration signaling meet the access policy, the registration state after correction is still successful in registration, and the second control device can further correct the first transmission link. The access policy and the requirements of the vehicle on the data transmission performance can be stored as subscription data in a UDM network element in the CPF network element.

In addition, the communication network provided by the embodiments of the present invention may be applied to a live driving scenario, where the specific access process is similar to an automatic driving scenario, and it is assumed that the first link attribute may be a bandwidth of 30M and a delay of 20ms, and this attribute may ensure that the user smoothly views the 720P live video. The SMF network element can obtain the bandwidth with the second link attribute of 30M and the delay of 10ms through the correction of the link attribute, and the attribute can enable a user to smoothly watch 1080P live video, so that the requirement of the user on the higher live effect is met. The specific implementation of this scenario may also be understood in conjunction with fig. 12.

The above embodiments all describe the access of the terminal device from the point of view of network architecture. It can also be described below from the point of view of an edge network element. Fig. 13 is a flowchart of a terminal device access method according to an embodiment of the present invention. The method may be performed by an edge network element in a communication network provided by the above embodiments. As shown in fig. 13, the method may include the steps of:

s101, controlling the terminal equipment in the service range to access the communication network according to the access information so as to obtain the registration state of the terminal equipment.

S102, if the registration state is successful, a target transmission link is established according to the access information.

S103, the link attribute of the target transmission link is sent to the user plane function network element, so that the user plane function network element forwards the data packet generated by the terminal equipment by using the target transmission link with the link attribute.

Alternatively, as in the embodiment shown in fig. 3, the edge network element may be centrally deployed, i.e. the edge network element has the full functionality of the AMF network element and the SMF network element in the core network shown in fig. 2. The edge network element may first implement registration of the terminal device according to the access information. If the registration is successful, session connection is further established according to the access information so as to obtain a target transmission link. Further, the edge network element may also send the link attribute of the target transmission link to the UPF network element, so that the UPF network element allocates network resources for the target transmission link according to the link attribute, thereby completing final access of the terminal device. The link attribute of the target transmission link obtained in the above manner may be the same as the second link attribute in the above embodiments. The usage access information in the above-described procedure may be the same as the first access information and the second access information in the above-described embodiments.

Because the edge network element and the UPF network element have the same service range, and the terminal equipment is also positioned in the service range, the network environment among the edge network element, the UPF network element and the UPF network element is relatively stable, the edge network element can realize the rapid access of the terminal equipment according to the mode, and the established target transmission path can also meet the requirement of the terminal equipment on the data transmission performance.

Alternatively, as in the embodiment shown in fig. 4, the edge network element may be distributed for comprehensive consideration of deployment cost and access speed, where the edge network element has a function of determining validity of the AMF network element and a function of establishing a transmission link of the SMF network element. The edge network element may first implement registration of the terminal device according to the access information. If the registration is successful, session connection is further established according to the access information, namely, a target transmission link is established for the terminal equipment, and the link attribute of the target transmission link is sent to the UPF network element, so that network resources are allocated for the target transmission link by the UPF network element according to the link attribute, and the preliminary access of the terminal equipment is completed. The access information used in the above procedure is the same as the first access information in the embodiment shown in fig. 4.

Because the edge network element and the UPF network element have the same service range, and the terminal equipment is also positioned in the service range, the network environment among the edge network element, the UPF network element and the terminal equipment is relatively stable, and the edge network element can realize the rapid access of the terminal equipment according to the mode. The link attribute of the target transmission link obtained in the above manner is the same as the first link attribute in the above embodiments, and the target transmission link can provide a basic data interaction capability for a user, but may not meet the requirement of the terminal device on the data transmission performance. Thus, optionally, the CPF network element may also be used to ensure the user experience. The specific operation of the CPF network element may be referred to the relevant description in the above embodiments, and will not be described herein.

In addition, the details of the present embodiment that are not described in detail in the present embodiment may be referred to the related descriptions in the above embodiments, which are not described herein.

In this embodiment, the edge network element is configured to implement network access of legal terminal devices according to the access information, so as to obtain an access result, where the obtained access result may include a registration state, a target transmission link obtained after session establishment, and a link attribute of the link, that is, implement preliminary network access of the terminal devices. And then, the UPF network element with the same service range as the edge network element utilizes the target transmission link to realize the forwarding of the data packet. Because the edge network element and the UPF network element have the same service range, and the terminal equipment is also positioned in the service range, signaling generated by the terminal equipment and the functional network element in the access process can be timely transmitted to the other party, thereby improving the transmission efficiency of the signaling and finally realizing the quick access of the terminal equipment. After the access, the data packet generated by the terminal equipment can also be rapidly forwarded by using the UPF network element positioned in the same area with the terminal equipment, so that the use experience of a user is ensured.

The above method embodiment can be applied to the live broadcast scene or the automatic driving scene as well, and specific content can be seen from the above related description.

In one possible design, the terminal device access method provided in the foregoing embodiments may be applied to an electronic device, as shown in fig. 14, where the electronic device may include: a processor 21 and a memory 22. Wherein the memory 22 is configured to store a program for supporting the electronic device to execute the terminal device access method provided in the embodiment shown in fig. 13, and the processor 21 is configured to execute the program stored in the memory 22.

The program comprises one or more computer instructions which, when executed by the processor 21, are capable of carrying out the steps of:

controlling terminal equipment in the service range to access a communication network according to the access information so as to obtain the registration state of the terminal equipment;

Optionally, the processor 21 is further configured to perform all or part of the steps in the embodiment shown in fig. 13.

The structure of the electronic device may further include a communication interface 23, for the electronic device to communicate with other devices or a communication network.

In addition, an embodiment of the present invention provides a computer storage medium, configured to store computer software instructions for the electronic device, where the computer storage medium includes a program for executing the method for accessing a terminal device according to the method embodiment shown in fig. 13.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A communication network, comprising: user plane function network elements and edge function network elements with the same service range and terminal equipment within the service range;

2. The network of claim 1, wherein the network further comprises: a control plane function network element with a service range larger than that of the user plane function network element;

the control plane functional network element is configured to modify the access result according to second access information reflecting the access requirement of the terminal device, where the modified access result includes a registration state of the terminal device and a second link attribute of the target transmission link;

the user plane function network element is further configured to forward a data packet according to the target transmission link having the second link attribute in response to the modification of the access result.

3. The network of claim 2, wherein the edge function network elements include access and mobility management function sub-network elements, session management function sub-network elements, and unified data management function sub-network elements.

4. A network according to claim 3, wherein the first access information comprises a data network name corresponding to the terminal device;

the access and mobility management function sub-network element is configured to determine a first data network name according to a first correspondence between the terminal device and a data network name that the terminal device is allowed to access, where the first correspondence is stored in the unified data management function sub-network element;

responding to the registration signaling sent by the terminal equipment, and acquiring a second data network name in the registration signaling;

and if the first data network name is the same as the second data network name, determining that the terminal equipment is legal equipment so as to control the legal terminal equipment to finish registration.

5. The network of claim 4, wherein the first access information comprises network address types supported by the terminal device;

the session management function sub-network element is configured to determine a first network address type according to a second corresponding relationship between the terminal device and a network address type supported by the terminal device, where the second corresponding relationship is stored in the unified data management function sub-network element;

Responding to a session establishment signaling sent by the terminal equipment, and acquiring a second network address type in the session establishment signaling;

and if the second network address type is the same as the first network address type, distributing the network address of the first network address type to the terminal equipment.

6. A network according to claim 3, wherein the second access information comprises: the access strategy corresponding to the terminal equipment;

the control plane functional network element comprises an access and mobility management functional network element;

the access and mobility management function sub-network element is used for sending the registration state in the access result to the access and mobility management function network element according to a first preset interface between the access and mobility management function sub-network element and the access and mobility management function network element;

the access and mobility management function network element is used for correcting the registration state in the access result according to the access strategy.

7. The network of claim 6, wherein the second access information further comprises: the terminal sets corresponding data transmission requirements;

the control plane function network element also comprises a session management function network element;

The session management function sub-network element is configured to send a first link attribute in the access result to the session management function network element according to a second preset interface between the session management function sub-network element and the session management function network element;

the session management function network element is configured to adjust the first link attribute to be the second link attribute according to the data transmission requirement if the registration state in the corrected access result is that the access is successful;

and sending the second link attribute to the user plane function network element.

8. The network of claim 4, wherein the control plane function network element further comprises a unified data management function network element;

the unified data management function sub-network element is configured to obtain the first correspondence and the second correspondence according to a third preset interface between the unified data management function sub-network element and the unified data management function sub-network element.

9. A vehicle networking comprising: user plane function network elements and edge function network elements with the same service range and vehicles within the service range;

the edge function network element is used for controlling legal vehicles to access the Internet of vehicles according to the first access information of the vehicles so as to obtain an access result, wherein the access result comprises a registration state of the vehicles and a first link attribute of a target transmission link established in an access process;

10. A communication network, comprising: the system comprises a wireless access network, user plane function network elements and edge function network elements with the same service range, terminal equipment in the service range and control plane function network elements with the service range larger than that of the user plane function network elements;

11. The network of claim 10, wherein the edge function network element comprises: an access and mobility management function sub-network element and a session management function sub-network element; the control plane function network element comprises: an access and mobility management function sub-network element and a session management function network element;

the access and mobility management function sub-network element is configured to send a registration state in the access result to the access and mobility management function sub-network element according to a first preset interface between the access and mobility management function sub-network element and the access and mobility management function sub-network element, so that the access and mobility management function sub-network element corrects the registration state;

the session management function sub-network element is configured to send a first link attribute in the access result to the session management function network element according to a second preset interface between the session management function sub-network element and the session management function network element, so that the session management function network element adjusts the first link attribute to be the second link attribute.

12. An access method for a terminal device, which is applied to an edge function network element with the same service range as a user plane function network element in a communication network, comprises the following steps:

13. An electronic device, comprising: a memory, a processor; wherein the memory has stored thereon executable code which, when executed by the processor, causes the processor to perform the terminal device access method of claim 12.

14. A non-transitory machine-readable storage medium having stored thereon executable code, which when executed by a processor of an electronic device, causes the processor to perform the terminal device access method of claim 12.