CN116390184A - User plane function network element online replacement method, network element equipment and storage medium - Google Patents

User plane function network element online replacement method, network element equipment and storage medium Download PDF

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Publication number
CN116390184A
CN116390184A CN202310641233.9A CN202310641233A CN116390184A CN 116390184 A CN116390184 A CN 116390184A CN 202310641233 A CN202310641233 A CN 202310641233A CN 116390184 A CN116390184 A CN 116390184A
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China
Prior art keywords
user plane
network element
function network
plane function
anchor point
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CN202310641233.9A
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Chinese (zh)
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郝文杰
石磊
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Alibaba China Co Ltd
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Alibaba China Co Ltd
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Priority to CN202310641233.9A priority Critical patent/CN116390184A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels

Abstract

The application discloses a user plane function network element online replacement method, network element equipment and a storage medium. Wherein the method comprises the following steps: when the preset triggering condition is met, access address information of the user terminal equipment is obtained; based on the access address information, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and a target access anchor point user plane function network element, and route migration is carried out between the initial access anchor point user plane function network element and the target access anchor point user plane function network element, so that a migration result is obtained, wherein the migration result is used for carrying out data transmission between the target access anchor point user plane function network element and a remote server. The technical problems that communication network data transmission flexibility is low, safety and stability are poor due to the fact that the related technology cannot realize that anchor point user plane function network elements are replaced under the online condition of user terminal equipment are solved.

Description

User plane function network element online replacement method, network element equipment and storage medium
Technical Field
The present application relates to the field of computer technologies and communication technologies, and in particular, to a method for online replacement of a user plane function network element, a network element device, and a storage medium.
Background
In the actual deployment and application process of the communication core network, a user plane function network element (User Plane Function, UPF) is often involved in a disaster recovery scene in different places and a near access scene in a cross-region. The UPF off-site disaster recovery scenario refers to a scenario in which an online user is dynamically migrated to another UPF to maintain user service continuity when the UPF fails. In the process of the cross-region movement of the user, as the access anchor point UPF cannot be replaced, the user service can only be replaced to the initial access anchor point UPF, which leads to a longer service access path and further leads to an increase in access delay, and for this reason, a scene which hopes to be able to access a server of a destination in order to reduce access delay when the user performs the cross-region movement is called a cross-region access scene. Aiming at UPF (unified power flow) remote disaster recovery scenes and cross-regional nearby access scenes, the dynamic replacement technology of access anchor UPF becomes one of important problems in the related field. However, the prior art in the related art does not realize dynamic replacement of the access anchor UPF.
Disclosure of Invention
The embodiment of the application provides a user plane function network element online replacement method, network element equipment and a storage medium, which at least solve the technical problems that communication network data transmission flexibility is low, safety and stability are poor, which are caused by the fact that the anchor point user plane function network element cannot be replaced under the online condition of user terminal equipment in the related technology.
According to an aspect of an embodiment of the present application, there is provided a method for online replacement of a user plane function network element, including: when a preset triggering condition is met, access address information of the user terminal equipment is obtained, wherein the preset triggering condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor point user plane function network element; based on the access address information, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and a target access anchor point user plane function network element, and route migration is carried out between the initial access anchor point user plane function network element and the target access anchor point user plane function network element to obtain a migration result, wherein the data transmission tunnel is used for carrying out data transmission between the base station and the target access anchor point user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor point user plane function network element and a remote server.
According to another aspect of the embodiment of the present application, there is further provided a method for online replacement of a user plane function network element, including: when a preset triggering condition is met, access address information of the user terminal equipment is obtained from the control plane network element, wherein the preset triggering condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated in the initial access anchor point user plane function network element; based on the access address information, the route corresponding to the access address information is issued so as to carry out data transmission between the target access anchor point user plane function network element and the remote server.
According to another aspect of the embodiments of the present application, there is also provided a network element device, including: a memory storing an executable program; and the processor is used for running a program, wherein the program executes any one of the user plane function network element online replacement methods.
According to another aspect of the embodiments of the present application, there is further provided a computer readable storage medium, where the computer readable storage medium includes a stored program, and when the program runs, the device where the computer readable storage medium is located is controlled to execute any one of the above-mentioned online user plane function network element replacement methods.
In the embodiment of the application, when a preset trigger condition is met, access address information of user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor user plane function network element to a target access anchor user plane function network element, the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor user plane function network element, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and the target access anchor user plane function network element based on the access address information, and then route migration is carried out between the initial access anchor user plane function network element and the target access anchor user plane function network element, so that a migration result is obtained, wherein the data transmission tunnel is used for carrying out data transmission between a base station and the target access anchor user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor user plane function network element and a remote server.
It is easy to note that, by detecting the replacement condition of the access anchor point UPF corresponding to the user terminal device, the online replacement method for the user plane function network element provided by the present application establishes a data transmission channel between the base station and the target access anchor point UPF in real time, and further realizes automatic route migration between the initial access anchor point user plane function network element and the target access anchor point user plane function network element, and completes dynamic replacement of the access anchor point UPF of the user terminal device in the online state of the user. Therefore, the purpose of dynamically replacing the anchor point user plane function network element under the online condition of the user terminal equipment is achieved, the technical effects of improving the flexibility, safety and stability of communication network data transmission are achieved, and the technical problems that the flexibility, safety and stability of communication network data transmission are low due to the fact that the anchor point user plane function network element cannot be replaced under the online condition of the user terminal equipment in the related technology are solved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
fig. 1 shows a hardware block diagram of a computer terminal (or mobile device) for implementing a user plane function network element online replacement method;
fig. 2 is a flowchart of a method for online replacement of a user plane function network element according to embodiment 1 of the present application;
fig. 3 is a schematic diagram of an alternative user plane function network element online replacement procedure according to embodiment 1 of the present application;
fig. 4 is a schematic diagram of an alternative communication core network architecture according to embodiment 1 of the present application;
fig. 5 is a flowchart of a method for online replacement of a user plane function network element according to embodiment 2 of the present application;
fig. 6 is a schematic structural diagram of an online replacement device for a user plane function network element according to embodiment 3 of the present application;
fig. 7 is a schematic structural diagram of an online replacement device for a user plane function network element according to embodiment 4 of the present application;
fig. 8 is a block diagram of a network element device according to embodiment 5 of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
First, partial terms or terminology appearing in describing embodiments of the present application are applicable to the following explanation:
5G core network (5G core,5 GC): in a Network of a 5G core Network, each node is a Network Function (Network Function), otherwise known as a Network element. The network element of the 5G core network comprises: a user plane function (User Plane Function, UPF), a session management function (Session Management Function, SMF), an access management function (Access Management Function, AMF), etc.
The session management function (Session Management Function, SMF) is a functional component in the 5G core network for managing user sessions. When a terminal Equipment (UE) establishes a connection with the network, the SMF creates a session associated with the UE and is responsible for session management and maintenance throughout the session. The SMF is also responsible for controlling the data traffic of the user, transporting data packets from one network area to another.
An access management function (Access and Mobility Management Function, AMF) is a functional component in a 5G core network for managing access and mobility of users. When a terminal Equipment (UE) attempts to connect to a 5G network, the AMF authenticates the UE and grants access. The AMF is also responsible for tracking location information of the user terminal equipment and for controlling the movement of the UE equipment. If a UE device moves from one base station to another, the AMF will be responsible for handling the UE device's movement and changing it from the service area of one base station to the service area of another base station.
User plane function unit (User Plane Function, UPF): refers to functional components in the 5G core network for handling user data traffic. When a terminal device (UE) sends a packet, the UPF receives the packet and processes it according to policy control information and forwards it to the target device. UPF is also responsible for controlling the path of user data traffic, transporting packets from one network area to another.
Packet switched anchor UPF (Packet Switched Anchor UPF, PSA-UPF): refers to a variant UPF, PSA-UPA for supporting mobility management and data forwarding across subnets.
Radio base station (NR): refers to a radio access technology in a 5G core network. In NR, through specific frequency band and modulation mode, higher data transmission speed, lower delay and higher reliability are provided for the core network. The NR technology also supports a plurality of different frequency bands and bandwidths, and provides better adaptability for different application scenes.
TOR (Top-of-Rack) architecture: refers to a data center switch fabric with switches deployed on top of racks and one machine room switch (i.e., TOR switch) on each rack. TOR switches are responsible for routing their data traffic to a target device or other switch.
EOR (End-of-Row) architecture: refers to a data center switch fabric with switches deployed at the end of a rack and one aggregation switch (i.e., EOR switch) on each row of racks. The EOR switches connect TOR switches in each chassis and connect them with core switches or other EOR switches, forming a network fabric for the data center.
Under the standard 3GPP architecture of the communication network, the access anchor UPF is used as a core network data plane anchor, and the access anchor UPF cannot be dynamically replaced during the online period of a user because: because the access anchor UPF is used for route release of the terminal user, if the access anchor UPF is directly replaced during the online period of the user, the downlink data of the user cannot be normally returned; under the condition of lacking 3GPP standard flow support, direct replacement of an access anchor UPF can cause that user data cannot be forwarded normally between a base station and the UPF; in the case that the number of users carried by a single UPF is large (e.g., greater than one hundred thousand), if the users are directly replaced by new UPFs, a large amount of signaling will be generated, which may cause the risk of a signaling storm for the communication system; often in operator networks where the user size is large, end users on different UPFs may have IP duplication, which may lead to IP collision problems in the communication system if the access anchor UPF is directly replaced during the user's presence (while keeping the end user's IP unchanged).
In the actual deployment and application process of the communication core network, a user plane function network element (User Plane Function, UPF) is often involved in a disaster recovery scene in different places and a near access scene in a cross-region. Aiming at UPF (unified power flow) remote disaster recovery scenes and cross-regional nearby access scenes, the dynamic replacement technology of access anchor UPF becomes one of important problems in the related field.
Prior to the present application, no effective solutions have been proposed by the prior art in the relevant field with respect to the above-mentioned problems.
Example 1
According to an embodiment of the present application, there is further provided an embodiment of a method for online replacement of a user plane function network element, where the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from that shown or described herein.
The method embodiment provided in the first embodiment of the present application may be executed in a mobile terminal, a computer terminal or a similar computing device. Fig. 1 shows a block diagram of a hardware architecture of a computer terminal (or mobile device) for implementing a user plane function network element online replacement method. As shown in fig. 1, the computer terminal 10 (or mobile device 10) may include one or more (shown in the figures as 102a,102b, … …,102 n) processors 102 (the processors 102 may include, but are not limited to, a microprocessor (Microcontroller Unit, MCU) or a programmable logic device (Field Programmable Gate Array, FPGA) or the like processing means), a memory 104 for storing data, and a transmission means 106 for communication functions. In addition, the computer terminal 10 may further include: a display, an input/output interface (I/O interface), a universal serial bus (Universal Serial Bus, USB) port (which may be included as one of the ports of a computer bus), a network interface, a cursor control device (e.g., a mouse, a touch pad, etc.), a keyboard, a power supply, and/or a camera.
It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the electronic device described above. For example, the computer terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
It should be noted that the one or more processors 102 and/or other data processing circuits described above may be referred to generally herein as "data processing circuits. The data processing circuit may be embodied in whole or in part in software, hardware, firmware, or any other combination. Furthermore, the data processing circuitry may be a single stand-alone processing module, or incorporated, in whole or in part, into any of the other elements in the computer terminal 10 (or mobile device). As referred to in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of the path of the variable resistor termination to interface).
The memory 104 may be used to store software programs and modules of application software, such as program instructions/data storage devices corresponding to the user plane function network element online replacement method in the embodiment of the present application, and the processor 102 executes various function applications and data processing by running the software programs and modules stored in the memory 104, that is, implements the user plane function network element online replacement method described above. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission means 106 is arranged to connect to a network via a network interface for receiving or transmitting data. Specific examples of the network described above may include wired and/or wireless networks provided by the communication provider of the computer terminal 10. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module for communicating with the internet wirelessly.
The display as shown in fig. 1 may be, for example, a touch screen type liquid crystal display (Liquid Crystal Display, LCD) that may enable a user to interact with a user interface of the computer terminal 10 (or mobile device).
It should be noted here that, in some alternative embodiments, the computer device (or mobile device) shown in fig. 1 described above may include hardware elements (including circuitry), software elements (including computer code stored on a computer-readable medium), or a combination of both hardware and software elements. It should be noted that fig. 1 is only one example of a specific example, and is intended to illustrate the types of components that may be present in the computer device (or mobile device) described above.
In the above operating environment, the present application provides a method for online replacement of a user plane function network element as shown in fig. 2. Fig. 2 is a flowchart of a method for online replacement of a user plane function network element according to embodiment 1 of the present application, as shown in fig. 2, where the method for online replacement of a user plane function network element includes:
step S21, when a preset trigger condition is met, access address information of the user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor point user plane function network element;
step S22, based on the access address information, a data transmission tunnel is established between the base station corresponding to the user terminal equipment and the target access anchor point user plane function network element, and route migration is performed between the initial access anchor point user plane function network element and the target access anchor point user plane function network element to obtain a migration result, wherein the data transmission tunnel is used for data transmission between the base station and the target access anchor point user plane function network element, and the migration result is used for data transmission between the target access anchor point user plane function network element and the remote server.
The execution subject of the method provided by the embodiment of the application may be SMF. In the embodiment of the application, when the change of the access anchor point UPF of the user terminal equipment (UE) is detected, the equipment address allocated when the access anchor point UPF of the user terminal equipment before the change is activated (namely, the initial access anchor point user plane function network element) is acquired. The device address may include, but is not limited to: the device address is used for establishing a data transmission tunnel between the replaced access anchor point UPF (namely the target access anchor point user plane function network element) corresponding to the user terminal device and the base station so as to realize data transmission. On the basis, the user data route of the access anchor point UPF before replacement is migrated to the access anchor point UPF after replacement, so that the user terminal equipment can access the remote server through the access anchor point UPF after replacement. The remote server is a server for providing user services to user terminal equipment. The remote server may be an independent server or a server cluster, and the remote server may be deployed in the cloud.
In the embodiment of the application, when a preset trigger condition is met, access address information of user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor user plane function network element to a target access anchor user plane function network element, the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor user plane function network element, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and the target access anchor user plane function network element based on the access address information, and then route migration is carried out between the initial access anchor user plane function network element and the target access anchor user plane function network element, so that a migration result is obtained, wherein the data transmission tunnel is used for carrying out data transmission between a base station and the target access anchor user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor user plane function network element and a remote server.
It is easy to note that, by detecting the replacement condition of the access anchor point UPF corresponding to the user terminal device, the online replacement method for the user plane function network element provided by the present application establishes a data transmission channel between the base station and the target access anchor point UPF in real time, and further realizes automatic route migration between the initial access anchor point user plane function network element and the target access anchor point user plane function network element, and completes dynamic replacement of the access anchor point UPF of the user terminal device in the online state of the user. Therefore, the purpose of dynamically replacing the anchor point user plane function network element under the online condition of the user terminal equipment is achieved, the technical effects of improving the flexibility, safety and stability of communication network data transmission are achieved, and the technical problems that the flexibility, safety and stability of communication network data transmission are low due to the fact that the anchor point user plane function network element cannot be replaced under the online condition of the user terminal equipment in the related technology are solved.
In an alternative embodiment, the preset trigger condition includes one of:
the method comprises the steps that a user terminal device moves out of coverage of an initial access anchor point user plane function network element, and the initial access anchor point user plane function network element is confirmed to be replaced by a target access anchor point user plane function network element;
And C2, the initial access anchor point user plane function network element fails, and the initial access anchor point user plane function network element is determined to be replaced by the target access anchor point user plane function network element.
In the above optional embodiment, the coverage area of the initial access anchor point UPF is recorded as a first area, in an initial state, the ue is located in the first area, and when it is detected that the ue moves out of the first area and the ue is replaced to the target access anchor point UPF, it is determined that the condition C1 is satisfied, and then the preset trigger condition is satisfied.
Optionally, the coverage area of the target access anchor UPF is recorded as a second area, and when it is detected that the user terminal device starts from the first area to the second area, it is determined that the condition C1 is satisfied.
In the above optional embodiment, when it is detected that the initial access anchor point UPF corresponding to the user terminal device is in a fault state and the user terminal device is replaced to the target access anchor point UPF, it is determined that the condition C2 is satisfied, and then the preset trigger condition is satisfied.
As an exemplary embodiment, the standard-based I-UPF inserts a signaling procedure that is customized as follows: in the standard I-UPF insertion signaling flow, when detecting that the user terminal equipment moves out of the coverage area of the initial access anchor point user plane function network element, the SMF in the core network makes a decision of inserting the I-UPF. Therefore, the scheme for determining the I-UPF insertion time is customized and obtained on the basis of a standard I-UPF insertion signaling flow.
It is easy to understand that by detecting whether the ue satisfies the condition C1 and the condition C2, the trigger timing of establishing the data transmission tunnel between the base station corresponding to the ue and the target access anchor ue can be determined.
In an alternative embodiment, the data transmission tunnel includes: in step S22, a data transmission tunnel is established between the base station and the target access anchor point user plane functional network element based on the access address information, comprising the following method steps:
step S221, obtaining a first user plane tunnel identifier from a target access anchor point user plane function network element by using access address information, wherein the first user plane tunnel identifier is a user plane tunnel identifier allocated by the target access anchor point user plane function network element for a base station;
step S222, an uplink transmission tunnel is established between a base station and a target access anchor point user plane function network element based on a first user plane tunnel identification;
step S223, a second user plane tunnel identifier is obtained from the base station, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by the base station for a target access anchor point user plane functional network element;
Step S224, establish the downlink transmission tunnel between the base station and the functional network element of the user plane of the target access anchor point based on the second user plane tunnel identification.
In the above alternative embodiment, the first user plane tunnel identifier and the second user plane tunnel identifier may be Traffic Endpoint Identifiers (TEIDs). TEIDs are used to identify the two endpoints (i.e., source and destination of packets) of a user plane tunnel in the 5G core network. TEID may support mobility management and data transmission across subnets, while also supporting various quality of service (Quality of Service, qoS) and network slicing functions to meet the needs of different applications. The TEID allocated by the target access anchor user plane functional network element to the base station is used to establish an uplink transmission tunnel between the base station and the target access anchor user plane functional network element. The TEID allocated by the base station for the target access anchor user plane functional network element is used to establish a downlink transmission tunnel between the base station and the target access anchor user plane functional network element.
It is easy to notice that, in the state that the user terminal device remains online, based on the above access address information, an uplink transmission tunnel and a downlink transmission tunnel between the base station and the target access anchor point user plane functional network element are established, so as to ensure an environment required for performing route migration of user data between the base station and the target access anchor point user plane functional network element.
In an alternative embodiment, in step S221, the first user plane tunnel identifier is obtained from the target access anchor user plane function network element by using the access address information, and the method includes the following steps:
step S2211, a session establishment request message is sent to a target access anchor user plane function network element, where the information carried in the session establishment request message includes: the access address information is used for triggering a target access anchor point user plane function network element to distribute a first user plane tunnel identifier;
step S2212, receiving a session establishment response message from the target access anchor user plane function network element, where the information carried in the session establishment response message includes: the first user plane tunnel identity.
As an exemplary embodiment, as shown in fig. 3, a radio base station (NR), an access management function network element (ASMF), a session management function network element (SMF), a target access anchor user plane function network element (denoted as new_upf, which corresponds to the target access anchor user plane function network element), and an initial access anchor user plane function network element (denoted as old_upf, which corresponds to the initial access anchor user plane function network element) interact through a user terminal device registration and session establishment (UE attach and Establish Session) module. In the initial state, data communication is performed between the SMF and the old_upf, i.e., the old_upf is activated.
According to the above step S2211, as shown in fig. 3, T02 denotes: the SMF sends a session establishment request message (N4 Session Establishment Request) to the new_upf, and the SMF receives a session establishment response message (N4 Session Establishment Response) from the new_upf, where the session establishment response message includes a TEID (first user plane tunnel identifier) allocated by the new_upf for the base station (NR).
In particular, as an exemplary embodiment, the standard-based I-UPF inserts a signaling flow that is also customized as follows: in the standard I-UPF insertion signaling flow, when the SMF in the core network makes a decision of inserting the I-UPF, a session establishment request message sent by the SMF to the inserted I-UPF does not include user address information, and in this solution provided in this application, when the SMF establishes a data transmission tunnel between the base station and the target access anchor user plane functional network element, a session establishment request message (N4 Session Establishment Request) sent by the SMF to the target access anchor user plane functional network element (new_upf) includes UE IP (i.e., access address information) allocated by the user terminal device when the initial access anchor user plane functional network element (old_upf) is activated, and further includes tunnel information of new_upf.
It should be noted that, as an exemplary embodiment, still as shown in fig. 3, before T02, the method further includes: and T01, when the SMF makes a decision of replacing the access anchor UPF, informing the initial access anchor user plane function network element (old_UPF) to release the current session. Specifically, T01 includes: the SMF sends a session release request message to the old_upf (N4 Session Release Request), and the SMF receives a session release response message from the old_upf (N4 Session Release Response).
In an alternative embodiment, in step S222, an uplink transmission tunnel is established between the base station and the target access anchor user plane functional network element based on the first user plane tunnel identifier, including the following method steps:
step S2221, sending a first interface message to the access management function network element, where the information carried in the first interface message includes: a first user plane tunnel identification;
step S2222, forwarding the first user plane tunnel identifier to the base station via the access management function network element through the second interface message to establish an uplink transmission tunnel.
As an exemplary embodiment, still as shown in fig. 3, after the SMF receives the first user plane tunnel identifier included in the session establishment response message, performing T03, T03 includes: the SMF sends a first interface Message (namf_communication_n1n2message Transfer) to the AMF, where the first interface Message carries a first user plane tunnel identifier (i.e., a TEID allocated by new_upf to a base station (NR)).
Further, still as shown in fig. 3, after the AMF receives the first user plane tunnel identifier carried in the first interface message, executing T04, T04 includes: the AMF sends a second interface Message (N2 Message) to the base station (NR), the second interface Message being for forwarding the first user plane tunnel identity to the base station. Thereby, an Uplink transmission tunnel (as shown in fig. 3, T05 represents Uplink Data communication between NR and new_upf) is established between the base station and the target access anchor user plane function network element (new_upf).
In an alternative embodiment, in step S223, the second user plane tunnel identifier is obtained from the base station, including the following method steps:
step S2231, via the access management function network element, obtains the second user plane tunnel identifier from the base station through the second interface message.
As an exemplary embodiment, still as shown in fig. 3, T04 further includes: the base station (NR) returns a response message of the second interface message to the AMF, where the response message carries the TEID allocated by the NR for new_upf (i.e. the second user plane tunnel identifier).
In an alternative embodiment, in step S224, a downlink transmission tunnel is established between the base station and the target access anchor user plane functional network element based on the second user plane tunnel identifier, including the following method steps:
Step S2241, receiving a session context update request message from the access management function network element, where the information carried in the session context update request message includes: a second user plane tunnel identifier;
step S2242, a session modification request message is sent to the target access anchor user plane function network element to establish a downlink transmission tunnel, where the information carried in the session modification request message includes: and a second user plane tunnel identification.
As an exemplary embodiment, still as shown in fig. 3, after the AMF receives the second user plane tunnel identifier carried in the response message of the second interface message, T06 is executed, where T06 includes: the AMF sends a session context update request message (nsmf_pduse_ UpdateSMContext Request) to the SMF, the session context update request message carrying the second user plane tunnel identity.
Further, still as shown in fig. 3, after the SMF receives the second user plane tunnel identifier carried by the session context update request message, executing T07, where T07 includes: the SMF sends a session modification request message (N4 Session Modification Request) to the target access anchor user plane function network element (new_upf), the session modification request message carrying the second user plane tunnel identity. Thereby, it is achieved that a Downlink transmission tunnel is established between the base station and the target access anchor user plane function network element (new_upf) (T08 as shown in fig. 3 represents Downlink Data (Downlink Data) communication between NR and new_upf).
It is easy to notice that, in the state that the user terminal device remains online, based on the above access address information, an uplink transmission tunnel and a downlink transmission tunnel between the base station and the target access anchor point user plane functional network element are established, so as to ensure an environment required for performing route migration of user data between the base station and the target access anchor point user plane functional network element.
In an alternative embodiment, in step S22, route migration is performed between the initial access anchor user plane function network element and the target access anchor user plane function network element based on the access address information, to obtain a migration result, including the following method steps:
step S225, based on the access address information, triggering the initial access anchor point user plane function network element to cancel the release of the route corresponding to the access address information, and triggering the target access anchor point user plane function network element to release the route corresponding to the access address information, thereby obtaining the migration result.
In the above-mentioned alternative embodiment, based on the communication core network architecture shown in fig. 4, in an initial state, a User Equipment (UE) accesses a service end (server) through a radio base station (NR), an access management function network element (AMF), a unified data management function (UDM), and a session management function network element (SMF) via an initial access anchor user plane function network element (old_upf), specifically, when the old_upf is activated, the old_upf actively performs route distribution on access address information of the user equipment, so that downlink data sent to the user equipment by a remote end server can be routed to the user equipment. However, when the access anchor UPF needs to be replaced, that is, the activated UPF is replaced from old_upf to the target access anchor user plane function network element (new_upf), the following condition needs to be satisfied: the access address information of the UE is routed and issued by adopting a dynamic route issuing mode when the UE is kept on-line, and old_upf needs to be converged when new_upf is activated.
As an exemplary embodiment, as shown in fig. 4, the dynamic route distribution manner includes: when the SMF makes a decision to replace the access anchor UPF, based on the access address information, the SMF controls the old_UPF to cancel the route release of the access address information of the UE, and simultaneously, the SMF controls the new_UPF to release the route of the access address information of the UE. That is, the dynamic route distribution mode is adopted to realize the route migration between the old_UPF and the new_UPF.
It should be noted that, when the old_upf fails, it is difficult for the SMF to control the old_upf to perform active route convergence, so, as shown in fig. 4, based on the dynamic route release, a bidirectional forwarding detection (Bidirectional Forwarding Detection, BFD) protocol is bound for the old_upf, and then, whether the direct link between the old_upf and the machine room switch 1 is in interworking is detected by using the BFD protocol, and when the direct link between the old_upf and the machine room switch 1 is not in interworking, the old_upf is controlled to perform route convergence.
In an alternative embodiment, the method for online replacement of the user plane function network element is applied to a control plane network element of the cloud, where the initial access anchor point user plane function network element and the target access anchor point user plane function network element are respectively located in different machine rooms, or the initial access anchor point user plane function network element and the target access anchor point user plane function network element are located in the same machine room.
As an exemplary embodiment, as also shown in fig. 4, the initial access anchor user plane function element (old_upf) and the target access anchor user plane function element (new_upf) are located in different rooms, respectively, the old_upf is connected to the room switch 1 (i.e., TOR switch 1), the new_upf is connected to the room switch 2 (i.e., TOR switch 2), and then the communication is performed with the remote server through the aggregation switch (EOR switch).
In another exemplary embodiment, the initial access anchor user plane function element (old_upf) and the target access anchor user plane function element (new_upf) are located in the same machine room, and may also be connected to the same TOR switch, so as to implement communication with a remote server
The user plane function network element online replacement method provided by the invention can realize the dynamic replacement of the access anchor point UPF under the state that the user terminal equipment keeps online by customizing the standard I-UPF insertion signaling flow and combining with the dynamic route release mode.
The technical scheme provided by the embodiment of the application is suitable for the following application scenes: under a private network scene (the scale of users is generally within ten thousand), a control plane is deployed at a cloud end, and data planes are distributed in different machine rooms. In the application scenario, the following problems can be solved by adopting the technical scheme provided by the embodiment to realize dynamic replacement of the access anchor point UPF: the tunnel intercommunication is realized between the base station and the replaced access anchor point UPF; and performing user route migration based on the replaced access anchor UPF.
It should be noted that, the user information (including but not limited to user equipment information, user personal information, etc.) and the data (including but not limited to data for analysis, stored data, presented data, etc.) related to the present application are information and data authorized by the user or fully authorized by each party, and the collection, use and processing of the related data need to comply with the related laws and regulations and standards of the related country and region, and provide corresponding operation entries for the user to select authorization or rejection.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus a necessary general hardware platform, but that it may also be implemented by means of hardware. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk, optical disk), comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.
Example 2
In the operating environment as in example 1, the present application provides another method for online replacement of user plane function network elements as shown in fig. 5. Fig. 5 is a flowchart of a method for online replacement of a user plane function network element according to embodiment 2 of the present application, as shown in fig. 5, where the method for online replacement of a user plane function network element includes:
step S51, when a preset triggering condition is met, access address information of the user terminal equipment is obtained from a control plane network element, wherein the preset triggering condition is used for determining that the user terminal equipment is replaced by a target access anchor point user plane function network element from an initial access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor point user plane function network element;
step S52, based on the access address information, the route corresponding to the access address information is issued so as to perform data transmission between the target access anchor point user plane function network element and the remote server.
The execution body of the method provided by the embodiment of the application may be a changed access anchor UPF (denoted as new_upf, i.e. a target access anchor user plane function unit). In this embodiment of the present application, when it is detected that an access anchor UPF of a User Equipment (UE) is replaced, an equipment address (UE IP) allocated to the user equipment when the access anchor UPF of the user equipment before the replacement is activated (i.e., an initial access anchor user plane function network element) is obtained from an SMF corresponding to the UE, where the equipment address is used to establish a data transmission tunnel between the access anchor UPF corresponding to the user equipment after the replacement (i.e., a target access anchor user plane function network element) and a base station to implement data transmission. On the basis, the replaced access anchor point UPF issues the route corresponding to the access address information according to the access address information, so that the user terminal equipment can access the remote server through the replaced access anchor point UPF. The remote server is a server for providing user services to user terminal equipment. The remote server may be an independent server or a server cluster, and the remote server may be deployed in the cloud.
In the embodiment of the application, when a preset trigger condition is met, access address information of user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor user plane function network element to a target access anchor user plane function network element, the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor user plane function network element, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and the target access anchor user plane function network element based on the access address information, and then route migration is carried out between the initial access anchor user plane function network element and the target access anchor user plane function network element, so that a migration result is obtained, wherein the data transmission tunnel is used for carrying out data transmission between a base station and the target access anchor user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor user plane function network element and a remote server.
It is easy to note that, by detecting the replacement condition of the access anchor point UPF corresponding to the user terminal device, the online replacement method for the user plane function network element provided by the present application establishes a data transmission channel between the base station and the target access anchor point UPF in real time, and further realizes automatic route migration between the initial access anchor point user plane function network element and the target access anchor point user plane function network element, and completes dynamic replacement of the access anchor point UPF of the user terminal device in the online state of the user. Therefore, the purpose of dynamically replacing the anchor point user plane function network element under the online condition of the user terminal equipment is achieved, the technical effects of improving the flexibility, safety and stability of communication network data transmission are achieved, and the technical problems that the flexibility, safety and stability of communication network data transmission are low due to the fact that the anchor point user plane function network element cannot be replaced under the online condition of the user terminal equipment in the related technology are solved.
In an alternative embodiment, the method for online replacement of a user plane function network element further includes:
step S53, a first user plane tunnel identifier is sent to the control plane network element, wherein the first user plane tunnel identifier is a user plane tunnel identifier allocated to a base station corresponding to the user terminal equipment by the target access anchor point user plane functional network element, and the first user plane tunnel identifier is used for establishing an uplink transmission tunnel between the base station and the target access anchor point user plane functional network element.
As also shown in fig. 3, the new_upf sends the first user plane tunnel identity to the SMF via T02. The first user plane tunnel identity is the TEID allocated by new_upf for the base station. The first user plane tunnel identifier is carried by the SMF sending a session setup request message (N4 Session Establishment Request) to the new_upf.
In an alternative embodiment, the method for online replacement of a user plane function network element further includes:
step S54, receiving a second user plane tunnel identifier from the control plane network element, wherein the second user plane tunnel identifier is a user plane tunnel identifier allocated by the base station for the target access anchor point user plane function network element, and the second user plane tunnel identifier is used for establishing a downlink transmission tunnel between the base station and the target access anchor point user plane function network element.
As also shown in fig. 3, the new_upf receives the second user plane tunnel identity from the SMF via T07. The second user plane tunnel identity is the TEID allocated by the base station for new_upf. The second user plane tunnel identifier is carried by a session modification request message (N4 Session Modification Request) sent by the SMF to the new_upf.
In an alternative embodiment, the method for online replacement of a user plane function network element further includes:
step S551, receiving uplink data from the ue via the uplink transport tunnel;
in step S552, the uplink data is forwarded to the remote server through the route corresponding to the access address information.
As also shown in fig. 3, the new_upf receives Uplink Data (Uplink Data) from the user terminal equipment (UE) through the established Uplink transmission tunnel between the base station and the new_upf by T05. Then, the new_upf forwards the uplink data to a remote server (server) through a route corresponding to the access address information.
In an alternative embodiment, the method for online replacement of a user plane function network element further includes:
step S561, receiving the downlink data from the remote server through the route corresponding to the access address information;
Step S562, forwarding the downlink data to the user terminal equipment via the downlink transmission tunnel.
Still as shown in fig. 3, through T08, the new_upf receives Downlink Data (Downlink Data) from the remote server through the route corresponding to the access address information, and forwards the Downlink Data to the user terminal equipment (UE) through the Downlink transmission tunnel between the established base station and the new_upf.
The user plane function network element online replacement method provided by the invention can realize the dynamic replacement of the access anchor point UPF under the state that the user terminal equipment keeps online by customizing the standard I-UPF insertion signaling flow and combining with the dynamic route release mode.
The technical scheme provided by the embodiment of the application is suitable for the following application scenes: under a private network scene (the scale of users is generally within ten thousand), a control plane is deployed at a cloud end, and data planes are distributed in different machine rooms. In the application scenario, the following problems can be solved by adopting the technical scheme provided by the embodiment to realize dynamic replacement of the access anchor point UPF: the tunnel intercommunication is realized between the base station and the replaced access anchor point UPF; and performing user route migration based on the replaced access anchor UPF.
It should be noted that, the preferred implementation manner of this embodiment may be referred to the related description in embodiment 1, and will not be repeated here.
Example 3
According to the embodiment of the application, an embodiment of a device for implementing the method for online replacement of the user plane function network element is also provided. Fig. 6 is a schematic structural diagram of an online replacement device for a user plane function network element according to embodiment 3 of the present application, as shown in fig. 6, where the device includes:
the acquiring module 601 is configured to acquire access address information of a user terminal device when a preset trigger condition is met, where the preset trigger condition is used to determine that the user terminal device is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information allocated when the user terminal device is activated by the initial access anchor point user plane function network element;
the migration module 602 is configured to establish a data transmission tunnel between a base station corresponding to the user terminal device and a target access anchor user plane function network element based on the access address information, and perform route migration between the initial access anchor user plane function network element and the target access anchor user plane function network element to obtain a migration result, where the data transmission tunnel is used for performing data transmission between the base station and the target access anchor user plane function network element, and the migration result is used for performing data transmission between the target access anchor user plane function network element and a remote server.
Optionally, in the above-mentioned user plane function network element online replacement device, the preset trigger condition includes one of the following: the user terminal equipment moves out of the coverage area of the initial access anchor point user plane function network element, and determines to change the initial access anchor point user plane function network element into a target access anchor point user plane function network element; the initial access anchor point user plane function network element fails, and the initial access anchor point user plane function network element is determined to be replaced by the target access anchor point user plane function network element.
Optionally, the data transmission tunnel includes: the migration module 602 is configured to: acquiring a first user plane tunnel identifier from a target access anchor point user plane function network element by utilizing access address information, wherein the first user plane tunnel identifier is a user plane tunnel identifier distributed by the target access anchor point user plane function network element for a base station; establishing an uplink transmission tunnel between a base station and a target access anchor point user plane functional network element based on a first user plane tunnel identifier; acquiring a second user plane tunnel identifier from the base station, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by the base station for a target access anchor point user plane functional network element; and establishing a downlink transmission tunnel between the base station and the target access anchor point user plane functional network element based on the second user plane tunnel identifier.
Optionally, the migration module 602 is further configured to: sending a session establishment request message to a target access anchor point user plane function network element, wherein the information carried in the session establishment request message comprises: the access address information is used for triggering a target access anchor point user plane function network element to distribute a first user plane tunnel identifier; receiving a session establishment response message from the target access anchor point user plane function network element, wherein the information carried in the session establishment response message comprises: the first user plane tunnel identity.
Optionally, the migration module 602 is further configured to: sending a first interface message to an access management function network element, wherein the information carried in the first interface message comprises: a first user plane tunnel identification; and forwarding the first user plane tunnel identifier to the base station through the second interface message by the access management function network element so as to establish an uplink transmission tunnel.
Optionally, the migration module 602 is further configured to: and acquiring a second user plane tunnel identifier from the base station through a second interface message by the access management function network element.
Optionally, the migration module 602 is further configured to: receiving a session context update request message from an access management function network element, wherein the information carried in the session context update request message comprises: a second user plane tunnel identifier; transmitting a session modification request message to a target access anchor user plane function network element to establish a downlink transmission tunnel, wherein the information carried in the session modification request message comprises: and a second user plane tunnel identification.
Optionally, the migration module 602 is further configured to: based on the access address information, triggering the initial access anchor point user plane function network element to cancel the release of the route corresponding to the access address information, and triggering the target access anchor point user plane function network element to release the route corresponding to the access address information, so as to obtain a migration result.
Optionally, in the above user plane function network element online replacement device, the user plane function network element online replacement method is applied to a control plane network element of the cloud, where the initial access anchor point user plane function network element and the target access anchor point user plane function network element are respectively located in different machine rooms, or the initial access anchor point user plane function network element and the target access anchor point user plane function network element are located in the same machine room.
In the embodiment of the application, when a preset trigger condition is met, access address information of user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor user plane function network element to a target access anchor user plane function network element, the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor user plane function network element, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and the target access anchor user plane function network element based on the access address information, and then route migration is carried out between the initial access anchor user plane function network element and the target access anchor user plane function network element, so that a migration result is obtained, wherein the data transmission tunnel is used for carrying out data transmission between a base station and the target access anchor user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor user plane function network element and a remote server.
It is easy to notice that, the online replacement device for the user plane function network element provided by the present application establishes a data transmission channel between the base station and the target access anchor point UPF in real time through detecting the replacement condition of the access anchor point UPF corresponding to the user terminal device, so as to automatically perform route migration between the initial access anchor point user plane function network element and the target access anchor point user plane function network element, and complete dynamic replacement of the access anchor point UPF of the user terminal device in the online state of the user. Therefore, the purpose of dynamically replacing the anchor point user plane function network element under the online condition of the user terminal equipment is achieved, the technical effects of improving the flexibility, safety and stability of communication network data transmission are achieved, and the technical problems that the flexibility, safety and stability of communication network data transmission are low due to the fact that the anchor point user plane function network element cannot be replaced under the online condition of the user terminal equipment in the related technology are solved.
Here, it should be noted that the above-mentioned obtaining module 601 and migration module 602 correspond to step S21 to step S22 in embodiment 1, and the two modules are the same as the examples and application scenarios implemented by the corresponding steps, but are not limited to those disclosed in embodiment 1 above. It should be noted that the above-mentioned modules or units may be hardware components or software components stored in a memory (for example, the memory 104) and processed by one or more processors (for example, the processors 102a,102b, … …,102 n), and the above-mentioned modules may also be executed as a part of the apparatus in the computer terminal 10 provided in embodiment 1.
It should be noted that, the preferred implementation manner of this embodiment may be referred to the related description in embodiment 1, and will not be repeated here.
Example 4
According to the embodiment of the application, an embodiment of a device for implementing the method for online replacement of the user plane function network element is also provided. Fig. 7 is a schematic structural diagram of an online replacement device for a user plane function network element according to embodiment 4 of the present application, as shown in fig. 7, where the device includes:
an obtaining module 701, configured to obtain, when a preset trigger condition is met, access address information of a user terminal device from a control plane network element, where the preset trigger condition is used to determine that the user terminal device is changed from an initial access anchor user plane function network element to a target access anchor user plane function network element, and the access address information is address information allocated when the user terminal device activates the initial access anchor user plane function network element;
the issuing module 702 is configured to issue, based on the access address information, a route corresponding to the access address information, so as to perform data transmission between the target access anchor user plane function network element and the remote server.
Optionally, the device for online replacement of the user plane function network element further includes: a sending module 703 (not shown in the figure) configured to send a first user plane tunnel identifier to the control plane network element, where the first user plane tunnel identifier is a user plane tunnel identifier allocated by the target access anchor user plane functional network element to the base station corresponding to the user terminal device, and the first user plane tunnel identifier is used to establish an uplink transmission tunnel between the base station and the target access anchor user plane functional network element.
Optionally, the device for online replacement of the user plane function network element further includes: a receiving module 704 (not shown in the figure) is configured to receive a second user plane tunnel identifier from the control plane network element, where the second user plane tunnel identifier is a user plane tunnel identifier allocated by the base station for the target access anchor user plane functional network element, and the second user plane tunnel identifier is used to establish a downlink transmission tunnel between the base station and the target access anchor user plane functional network element.
Optionally, the device for online replacement of the user plane function network element further includes: a first forwarding module 705 (not shown in the figure) for receiving uplink data from the ue via the uplink transmission tunnel; and forwarding the uplink data to a remote server through a route corresponding to the access address information.
Optionally, the device for online replacement of the user plane function network element further includes: a second forwarding module 706 (not shown in the figure) configured to receive downstream data from the remote server through a route corresponding to the access address information; and forwarding the downlink data to the user terminal equipment through the downlink transmission tunnel.
In the embodiment of the application, when a preset trigger condition is met, access address information of user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor user plane function network element to a target access anchor user plane function network element, the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor user plane function network element, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and the target access anchor user plane function network element based on the access address information, and then route migration is carried out between the initial access anchor user plane function network element and the target access anchor user plane function network element, so that a migration result is obtained, wherein the data transmission tunnel is used for carrying out data transmission between a base station and the target access anchor user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor user plane function network element and a remote server.
It is easy to notice that, the online replacement device for the user plane function network element provided by the present application establishes a data transmission channel between the base station and the target access anchor point UPF in real time through detecting the replacement condition of the access anchor point UPF corresponding to the user terminal device, so as to automatically perform route migration between the initial access anchor point user plane function network element and the target access anchor point user plane function network element, and complete dynamic replacement of the access anchor point UPF of the user terminal device in the online state of the user. Therefore, the purpose of dynamically replacing the anchor point user plane function network element under the online condition of the user terminal equipment is achieved, the technical effects of improving the flexibility, safety and stability of communication network data transmission are achieved, and the technical problems that the flexibility, safety and stability of communication network data transmission are low due to the fact that the anchor point user plane function network element cannot be replaced under the online condition of the user terminal equipment in the related technology are solved.
Here, it should be noted that the above-mentioned obtaining module 701 and publishing module 702 correspond to step S51 to step S52 in embodiment 2, and the two modules are the same as the example and application scenario implemented by the corresponding steps, but are not limited to those disclosed in embodiment 2 above. It should be noted that the above-mentioned modules or units may be hardware components or software components stored in a memory (for example, the memory 104) and processed by one or more processors (for example, the processors 102a,102b, … …,102 n), and the above-mentioned modules may also be executed as a part of the apparatus in the computer terminal 10 provided in embodiment 1.
It should be noted that, the preferred implementation manner of this embodiment may be referred to the related description in embodiment 1 or embodiment 2, and will not be described herein.
Example 5
According to the embodiment of the application, there is further provided a network element device, where the network element device may be any one network element device in a network element device group of a communication network. Alternatively, in this embodiment, the network element device may be replaced by a terminal device such as a computer terminal or a mobile terminal.
In this embodiment, the network element device includes a memory, and an executable program is stored in the memory.
In this embodiment, the network element device further includes a processor, configured to execute a program, where the program executes program codes of the following steps in the user plane function network element online replacement method when the program runs: when a preset triggering condition is met, access address information of the user terminal equipment is obtained, wherein the preset triggering condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor point user plane function network element; based on the access address information, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and a target access anchor point user plane function network element, and route migration is carried out between the initial access anchor point user plane function network element and the target access anchor point user plane function network element to obtain a migration result, wherein the data transmission tunnel is used for carrying out data transmission between the base station and the target access anchor point user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor point user plane function network element and a remote server.
Alternatively, fig. 8 is a block diagram of a network element device according to embodiment 5 of the present application, and as shown in fig. 8, the network element device 80 may include: one or more (only one is shown) processors 802, memory 804, storage controller 806, and peripheral interface 808, wherein the peripheral interface 808 interfaces with a radio frequency module, an audio module, and a display.
The memory 804 may be configured to store software programs and modules, such as program instructions/modules corresponding to the user plane function network element online replacement method and apparatus in the embodiments of the present application, and the processor executes various function applications and data processing by running the software programs and modules stored in the memory, thereby implementing the user plane function network element online replacement method described above. The memory 804 may include high-speed random access memory, but may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, the memory 804 may further include memory remotely located with respect to the processor, which may be connected to the network element device 80 through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The processor 802 may call the information stored in the memory and the application program through the transmission device to perform the following steps: when a preset triggering condition is met, access address information of the user terminal equipment is obtained, wherein the preset triggering condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor point user plane function network element; based on the access address information, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and a target access anchor point user plane function network element, and route migration is carried out between the initial access anchor point user plane function network element and the target access anchor point user plane function network element to obtain a migration result, wherein the data transmission tunnel is used for carrying out data transmission between the base station and the target access anchor point user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor point user plane function network element and a remote server.
Optionally, the processor 802 may further execute the following program code: the preset trigger condition includes one of the following: the user terminal equipment moves out of the coverage area of the initial access anchor point user plane function network element, and determines to change the initial access anchor point user plane function network element into a target access anchor point user plane function network element; the initial access anchor point user plane function network element fails, and the initial access anchor point user plane function network element is determined to be replaced by the target access anchor point user plane function network element.
Optionally, the processor 802 may further execute the following program code: acquiring a first user plane tunnel identifier from a target access anchor point user plane function network element by utilizing access address information, wherein the first user plane tunnel identifier is a user plane tunnel identifier distributed by the target access anchor point user plane function network element for a base station; establishing an uplink transmission tunnel between a base station and a target access anchor point user plane functional network element based on a first user plane tunnel identifier; acquiring a second user plane tunnel identifier from the base station, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by the base station for a target access anchor point user plane functional network element; and establishing a downlink transmission tunnel between the base station and the target access anchor point user plane functional network element based on the second user plane tunnel identifier.
Optionally, the processor 802 may further execute the following program code: sending a session establishment request message to a target access anchor point user plane function network element, wherein the information carried in the session establishment request message comprises: the access address information is used for triggering a target access anchor point user plane function network element to distribute a first user plane tunnel identifier; receiving a session establishment response message from the target access anchor point user plane function network element, wherein the information carried in the session establishment response message comprises: the first user plane tunnel identity.
Optionally, the processor 802 may further execute the following program code: sending a first interface message to an access management function network element, wherein the information carried in the first interface message comprises: a first user plane tunnel identification; and forwarding the first user plane tunnel identifier to the base station through the second interface message by the access management function network element so as to establish an uplink transmission tunnel.
Optionally, the processor 802 may further execute the following program code: and acquiring a second user plane tunnel identifier from the base station through a second interface message by the access management function network element.
Optionally, the processor 802 may further execute the following program code: receiving a session context update request message from an access management function network element, wherein the information carried in the session context update request message comprises: a second user plane tunnel identifier; transmitting a session modification request message to a target access anchor user plane function network element to establish a downlink transmission tunnel, wherein the information carried in the session modification request message comprises: and a second user plane tunnel identification.
Optionally, the processor 802 may further execute the following program code: based on the access address information, triggering the initial access anchor point user plane function network element to cancel the release of the route corresponding to the access address information, and triggering the target access anchor point user plane function network element to release the route corresponding to the access address information, so as to obtain a migration result.
Optionally, the processor 802 may further execute the following program code: the user plane function network element online replacement method is applied to a control plane network element of a cloud end, and the initial access anchor point user plane function network element and the target access anchor point user plane function network element are respectively located in different machine rooms, or the initial access anchor point user plane function network element and the target access anchor point user plane function network element are located in the same machine room.
The processor 802 may call the information stored in the memory and the application program through the transmission device to perform the following steps: when a preset triggering condition is met, access address information of the user terminal equipment is obtained from the control plane network element, wherein the preset triggering condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated in the initial access anchor point user plane function network element; based on the access address information, the route corresponding to the access address information is issued so as to carry out data transmission between the target access anchor point user plane function network element and the remote server.
Optionally, the processor 802 may further execute the following program code: and sending a first user plane tunnel identifier to the control plane network element, wherein the first user plane tunnel identifier is a user plane tunnel identifier distributed by the target access anchor point user plane functional network element for a base station corresponding to the user terminal equipment, and the first user plane tunnel identifier is used for establishing an uplink transmission tunnel between the base station and the target access anchor point user plane functional network element.
Optionally, the processor 802 may further execute the following program code: and receiving a second user plane tunnel identifier from the control plane network element, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by the base station for the target access anchor point user plane functional network element, and the second user plane tunnel identifier is used for establishing a downlink transmission tunnel between the base station and the target access anchor point user plane functional network element.
Optionally, the processor 802 may further execute the following program code: receiving uplink data from user terminal equipment through an uplink transmission tunnel; and forwarding the uplink data to a remote server through a route corresponding to the access address information.
Optionally, the processor 802 may further execute the following program code: receiving downlink data from a remote server through a route corresponding to the access address information; and forwarding the downlink data to the user terminal equipment through the downlink transmission tunnel.
According to the embodiment of the application, a network element device for realizing an online replacement method of a user plane function network element is provided. When a preset trigger condition is met, access address information of user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, the access address information is address information distributed when the user terminal equipment is activated at the initial access anchor point user plane function network element, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and the target access anchor point user plane function network element based on the access address information, and then route migration is carried out between the initial access anchor point user plane function network element and the target access anchor point user plane function network element, so that a migration result is obtained, wherein the data transmission tunnel is used for carrying out data transmission between the base station and the target access anchor point user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor point user plane function network element and a remote server.
It is easy to note that, in the method for online replacement of a user plane function network element implemented by a network element device provided by the present application, by detecting the replacement condition of an access anchor point UPF corresponding to a user terminal device, a data transmission channel between a base station and a target access anchor point UPF is established in real time, so as to automatically implement route migration between an initial access anchor point user plane function network element and a target access anchor point user plane function network element, and complete dynamic replacement of the access anchor point UPF of the user terminal device in a user online state. Therefore, the purpose of dynamically replacing the anchor point user plane function network element under the online condition of the user terminal equipment is achieved, the technical effects of improving the flexibility, safety and stability of communication network data transmission are achieved, and the technical problems that the flexibility, safety and stability of communication network data transmission are low due to the fact that the anchor point user plane function network element cannot be replaced under the online condition of the user terminal equipment in the related technology are solved.
It will be understood by those skilled in the art that the structure shown in fig. 8 is only schematic, and the network element device may also be a terminal device such as a smart phone (e.g. an Android mobile phone, an iOS mobile phone, etc.), a tablet computer, a palm computer, and a mobile internet device (Mobile Internet Devices, MID). Fig. 8 does not limit the structure of the network element device. For example, the network element device 80 may also include more or fewer components (e.g., network interfaces, display devices, etc.) than shown in fig. 8, or have a different configuration than shown in fig. 8.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program for instructing a terminal device to execute in association with hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: flash disk, ROM, RAM, magnetic or optical disk, etc.
Example 6
According to an embodiment of the present application, there is also provided a computer-readable storage medium. Alternatively, in this embodiment, the storage medium may be used to store program codes executed by the user plane function network element online replacement method provided in the foregoing embodiment 1 or embodiment 2.
Alternatively, in this embodiment, the storage medium may be located in any one of the computer terminals in the computer terminal group in the computer network, or in any one of the mobile terminals in the mobile terminal group.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: when a preset triggering condition is met, access address information of the user terminal equipment is obtained, wherein the preset triggering condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated by the initial access anchor point user plane function network element; based on the access address information, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and a target access anchor point user plane function network element, and route migration is carried out between the initial access anchor point user plane function network element and the target access anchor point user plane function network element to obtain a migration result, wherein the data transmission tunnel is used for carrying out data transmission between the base station and the target access anchor point user plane function network element, and the migration result is used for carrying out data transmission between the target access anchor point user plane function network element and a remote server.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: the preset trigger condition includes one of the following: the user terminal equipment moves out of the coverage area of the initial access anchor point user plane function network element, and determines to change the initial access anchor point user plane function network element into a target access anchor point user plane function network element; the initial access anchor point user plane function network element fails, and the initial access anchor point user plane function network element is determined to be replaced by the target access anchor point user plane function network element.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: acquiring a first user plane tunnel identifier from a target access anchor point user plane function network element by utilizing access address information, wherein the first user plane tunnel identifier is a user plane tunnel identifier distributed by the target access anchor point user plane function network element for a base station; establishing an uplink transmission tunnel between a base station and a target access anchor point user plane functional network element based on a first user plane tunnel identifier; acquiring a second user plane tunnel identifier from the base station, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by the base station for a target access anchor point user plane functional network element; and establishing a downlink transmission tunnel between the base station and the target access anchor point user plane functional network element based on the second user plane tunnel identifier.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: sending a session establishment request message to a target access anchor point user plane function network element, wherein the information carried in the session establishment request message comprises: the access address information is used for triggering a target access anchor point user plane function network element to distribute a first user plane tunnel identifier; receiving a session establishment response message from the target access anchor point user plane function network element, wherein the information carried in the session establishment response message comprises: the first user plane tunnel identity.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: sending a first interface message to an access management function network element, wherein the information carried in the first interface message comprises: a first user plane tunnel identification; and forwarding the first user plane tunnel identifier to the base station through the second interface message by the access management function network element so as to establish an uplink transmission tunnel.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: and acquiring a second user plane tunnel identifier from the base station through a second interface message by the access management function network element.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: receiving a session context update request message from an access management function network element, wherein the information carried in the session context update request message comprises: a second user plane tunnel identifier; transmitting a session modification request message to a target access anchor user plane function network element to establish a downlink transmission tunnel, wherein the information carried in the session modification request message comprises: and a second user plane tunnel identification.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: based on the access address information, triggering the initial access anchor point user plane function network element to cancel the release of the route corresponding to the access address information, and triggering the target access anchor point user plane function network element to release the route corresponding to the access address information, so as to obtain a migration result.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: the user plane function network element online replacement method is applied to a control plane network element of a cloud end, and the initial access anchor point user plane function network element and the target access anchor point user plane function network element are respectively located in different machine rooms, or the initial access anchor point user plane function network element and the target access anchor point user plane function network element are located in the same machine room.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: when a preset triggering condition is met, access address information of the user terminal equipment is obtained from the control plane network element, wherein the preset triggering condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the user terminal equipment is activated in the initial access anchor point user plane function network element; based on the access address information, the route corresponding to the access address information is issued so as to carry out data transmission between the target access anchor point user plane function network element and the remote server.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: and sending a first user plane tunnel identifier to the control plane network element, wherein the first user plane tunnel identifier is a user plane tunnel identifier distributed by the target access anchor point user plane functional network element for a base station corresponding to the user terminal equipment, and the first user plane tunnel identifier is used for establishing an uplink transmission tunnel between the base station and the target access anchor point user plane functional network element.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: and receiving a second user plane tunnel identifier from the control plane network element, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by the base station for the target access anchor point user plane functional network element, and the second user plane tunnel identifier is used for establishing a downlink transmission tunnel between the base station and the target access anchor point user plane functional network element.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: receiving uplink data from user terminal equipment through an uplink transmission tunnel; and forwarding the uplink data to a remote server through a route corresponding to the access address information.
Optionally, in the present embodiment, the computer readable storage medium is configured to store program code for performing the steps of: receiving downlink data from a remote server through a route corresponding to the access address information; and forwarding the downlink data to the user terminal equipment through the downlink transmission tunnel.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the division of the units, is merely a logical function division, and may be implemented in another manner, for example, multiple units or components may be combined or may be 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 through some interfaces, units or modules, or may be in electrical or other forms.
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 on 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 each embodiment 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 software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, ROM, RAM, a mobile hard disk, a magnetic disk or an optical disk.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.

Claims (14)

1. The online user plane function network element replacing method is characterized by comprising the following steps:
when a preset trigger condition is met, access address information of user terminal equipment is obtained, wherein the preset trigger condition is used for determining that the user terminal equipment is changed from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the initial access anchor point user plane function network element is activated by the user terminal equipment;
based on the access address information, a data transmission tunnel is established between a base station corresponding to the user terminal equipment and the target access anchor point user plane function network element, and route migration is performed between the initial access anchor point user plane function network element and the target access anchor point user plane function network element to obtain a migration result, wherein the data transmission tunnel is used for data transmission between the base station and the target access anchor point user plane function network element, and the migration result is used for data transmission between the target access anchor point user plane function network element and a remote server.
2. The method for online replacement of a user plane function network element according to claim 1, wherein the preset trigger condition includes one of:
the user terminal equipment moves out of the coverage area of the initial access anchor point user plane function network element, and the user terminal equipment determines to replace the initial access anchor point user plane function network element with the target access anchor point user plane function network element;
and the initial access anchor point user plane function network element fails, and the initial access anchor point user plane function network element is determined to be replaced by the target access anchor point user plane function network element.
3. The method for online replacement of a user plane function network element according to claim 1, wherein the data transmission tunnel comprises: the establishing the data transmission tunnel between the base station and the target access anchor point user plane functional network element based on the access address information comprises the following steps:
acquiring a first user plane tunnel identifier from the target access anchor point user plane function network element by utilizing the access address information, wherein the first user plane tunnel identifier is a user plane tunnel identifier distributed to the base station by the target access anchor point user plane function network element;
Establishing the uplink transmission tunnel between the base station and the target access anchor point user plane function network element based on the first user plane tunnel identifier;
acquiring a second user plane tunnel identifier from the base station, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by the base station for the target access anchor point user plane function network element;
and establishing the downlink transmission tunnel between the base station and the target access anchor point user plane functional network element based on the second user plane tunnel identifier.
4. The method for online replacement of a user plane function network element according to claim 3, wherein obtaining the first user plane tunnel identifier from the target access anchor user plane function network element using the access address information comprises:
sending a session establishment request message to the target access anchor point user plane function network element, wherein the information carried in the session establishment request message comprises: the access address information is used for triggering the target access anchor point user plane function network element to distribute the first user plane tunnel identifier;
receiving a session establishment response message from the target access anchor point user plane function network element, wherein the information carried in the session establishment response message comprises: the first user plane tunnel identity.
5. The method of online replacement of a user plane function network element according to claim 4, wherein establishing the uplink transport tunnel between the base station and the target access anchor user plane function network element based on the first user plane tunnel identification comprises:
sending a first interface message to an access management function network element, wherein information carried in the first interface message comprises: the first user plane tunnel identifier;
forwarding the first user plane tunnel identifier to the base station through a second interface message by the access management function network element so as to establish the uplink transmission tunnel.
6. The method for online replacement of a user plane function network element according to claim 5, wherein obtaining the second user plane tunnel identifier from the base station comprises:
and acquiring the second user plane tunnel identifier from the base station through the second interface message by the access management function network element.
7. The method of on-line replacement of a user plane function network element according to claim 6, wherein establishing the downlink transport tunnel between the base station and the target access anchor user plane function network element based on the second user plane tunnel identification comprises:
Receiving a session context update request message from the access management function network element, wherein the information carried in the session context update request message includes: the second user plane tunnel identifier;
transmitting a session modification request message to the target access anchor user plane function network element to establish the downlink transmission tunnel, wherein the information carried in the session modification request message includes: and the second user plane tunnel identifier.
8. The method for online replacement of a user plane function network element according to claim 1, wherein performing route migration between the initial access anchor user plane function network element and the target access anchor user plane function network element based on the access address information, and obtaining the migration result includes:
and triggering the initial access anchor point user plane function network element to cancel the route release corresponding to the access address information based on the access address information, and triggering the target access anchor point user plane function network element to release the route corresponding to the access address information to obtain the migration result.
9. The method for online replacement of a user plane function network element according to claim 1, wherein the method for online replacement of a user plane function network element is applied to a control plane network element of a cloud end, and the initial access anchor point user plane function network element and the target access anchor point user plane function network element are respectively located in different machine rooms, or the initial access anchor point user plane function network element and the target access anchor point user plane function network element are located in the same machine room.
10. The online user plane function network element replacing method is characterized by comprising the following steps:
when a preset triggering condition is met, access address information of user terminal equipment is obtained from a control plane network element, wherein the preset triggering condition is used for determining that the user terminal equipment is replaced from an initial access anchor point user plane function network element to a target access anchor point user plane function network element, and the access address information is address information distributed when the initial access anchor point user plane function network element is activated by the user terminal equipment;
and based on the access address information, publishing a route corresponding to the access address information so as to perform data transmission between the target access anchor point user plane function network element and a remote server.
11. The method for online replacement of a user plane function network element according to claim 10, wherein the method for online replacement of a user plane function network element further comprises:
and sending a first user plane tunnel identifier to the control plane network element, wherein the first user plane tunnel identifier is a user plane tunnel identifier distributed by the target access anchor point user plane function network element for a base station corresponding to the user terminal equipment, and the first user plane tunnel identifier is used for establishing an uplink transmission tunnel between the base station and the target access anchor point user plane function network element.
12. The method for online replacement of a user plane function network element according to claim 10, wherein the method for online replacement of a user plane function network element further comprises:
and receiving a second user plane tunnel identifier from the control plane network element, wherein the second user plane tunnel identifier is a user plane tunnel identifier distributed by a base station for the target access anchor point user plane function network element, and the second user plane tunnel identifier is used for establishing a downlink transmission tunnel between the base station and the target access anchor point user plane function network element.
13. A network element device, comprising:
a memory storing an executable program;
a processor for running the program, wherein the program when run performs the user plane function network element online replacement method according to any one of claims 1 to 12.
14. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored executable program, wherein the executable program when run controls a device in which the storage medium is located to perform the method for online replacement of a user plane function network element according to any one of claims 1 to 12.
CN202310641233.9A 2023-05-31 2023-05-31 User plane function network element online replacement method, network element equipment and storage medium Pending CN116390184A (en)

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