CN115802421A - Session processing method, user plane function system and storage medium - Google Patents
Session processing method, user plane function system and storage medium Download PDFInfo
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Abstract
The disclosure provides a session processing method, a user plane function system and a storage medium, and relates to the technical field of communication. The disclosed session processing method includes: a user plane function UPF system acquires a user online request from a session management function SMF entity; the UPF system determines a target user plane processing unit according to the load state of the user plane processing unit, wherein the UPF system comprises a plurality of user plane processing units, and each user plane processing unit corresponds to a first address; the target user plane processing unit determines a target second address according to the corresponding second address pool, wherein each user plane processing unit corresponds to one second address pool; and the UPF system feeds back the target second address and the target first address corresponding to the target user plane processing unit to the SMF. By the method, the flow of the same user only appears in one user plane processing unit, and the accuracy and convenience of user information statistics are improved.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a session processing method, a user plane function system, and a storage medium.
Background
A User Plane Function (UPF) system may be divided into a User Plane processing unit and a signaling Plane processing unit, where the User Plane processing unit is mainly used to carry User traffic, including application of User policies and forwarding of User traffic; the signaling plane processing unit is mainly used for an online process of a user, for example, establishing an N4 interface Session with an SMF (Session Management Function) to perform signaling plane interaction. In addition, the access switch of the UPF system acts as a bridge between the UPF and the bearer network, interfaces with bearer network access devices (typically edge routers), and accesses the entire set of UPF systems to the bearer network.
Disclosure of Invention
One objective of the present disclosure is to provide a load balancing scheme for a UPF system, so as to improve accuracy and convenience of user information statistics.
According to an aspect of some embodiments of the present disclosure, there is provided a session processing method, including: the UPF system acquires a user online request from the SMF entity; the UPF system determines a target user plane processing unit according to the load state of the user plane processing unit, wherein the UPF system comprises a plurality of user plane processing units, each user plane processing unit corresponds to a first address, and the first address is an access network side address of the UPF system; the target user plane processing unit determines a target second address according to the corresponding second address pool, wherein each user plane processing unit corresponds to one second address pool, and the second address is a data network side address of the UPF system; and the UPF system feeds back the target second address and the target first address corresponding to the target user plane processing unit to the SMF, so that the user and a DN (Data Network) can communicate according to the target first address and the target second address.
In some embodiments, the determining, by the UPF system, the target user plane processing unit based on the load status of the user plane processing unit comprises: the UPF system selects a target user plane processing unit from the user plane processing units according to the load state of the user plane processing units and the sequence of the free resource amount from high to low.
In some embodiments, an intersection of the second addresses in the second address pool corresponding to different user plane processing units is null.
In some embodiments, the first address is an N3 address between the UPF system and the radio access network RAN and the second address is an N6 address between the UPF system and the DN.
In some embodiments, the method further comprises: a UPF system acquires a first flow from a DN side; determining a corresponding first user plane processing unit according to a destination address carried in the first flow; sending the first flow to a first user plane processing unit; the first user plane processing unit sends the first flow to the user.
In some embodiments, the method further comprises: the UPF system acquires a second flow from the access network side; determining a second address pool to which the destination address belongs according to the destination address of the second flow, and determining a corresponding second user plane processing unit; sending the second traffic to a second user plane processing unit; the second user plane processing unit sends the second traffic to the DN.
In some embodiments, the method further comprises: an access switch of the UPF system acquires a first address and a second address pool of each user plane processing unit; the access switch generates routing information for each user plane processing unit according to the second address pool and the first address, and establishes BGP (Border Gateway Protocol) neighbors of the access switch and each user plane processing unit.
In some embodiments, the method further comprises: after the access switch acquires the first traffic from N6, the access switch determines a corresponding first user plane processing unit according to the routing information and a destination address carried in the first traffic, and sends the first traffic to the first user plane processing unit.
In some embodiments, the method further comprises: and after acquiring the second traffic from the N3, the access switch determines a second address pool to which the destination address belongs according to the destination address of the second traffic, determines a corresponding second user plane processing unit, and sends the second traffic to the second user plane processing unit.
According to an aspect of some embodiments of the present disclosure, there is provided a user plane function system, including: the signaling plane processing unit is configured to acquire a user online request from the SMF entity and determine a target user plane processing unit according to the load state of the user plane processing unit; feeding back a target second address fed back by the target user plane processing unit and a target first address corresponding to the target user plane processing unit to the SMF so that a user and a DN can communicate according to the target first address and the target second address, wherein the UPF system comprises a plurality of user plane processing units, each user plane processing unit corresponds to a first address, and the first address is an access network side address of the UPF system; and the user plane processing unit is configured to determine a target second address according to corresponding second address pools when the signaling plane processing unit determines the target user plane processing unit, wherein each user plane processing unit corresponds to one second address pool, and the second address is a data network side address of the UPF system.
In some embodiments, the system further comprises: an access switch configured to: acquiring a first flow from a DN side, determining a corresponding first user plane processing unit according to a destination address carried in the first flow, and sending the first flow to the first user plane processing unit; the user plane processing unit is further configured to send the first traffic to the user.
In some embodiments, the system further comprises: an access switch configured to: acquiring second flow from an access network side, determining a second address pool to which a destination address belongs according to the destination address of the second flow, determining a corresponding second user plane processing unit, and sending the second flow to the second user plane processing unit; the user plane processing unit is further configured to send the second traffic to the DN.
In some embodiments, the access switch is further configured to: acquiring a first address pool and a second address pool of each user plane processing unit; and generating routing information for each user plane processing unit according to the second address pool and the first address, and establishing BGP neighbors of the access switch and each user plane processing unit.
According to an aspect of some embodiments of the present disclosure, there is provided a user plane function system, including: a memory; and a processor coupled to the memory, the processor configured to perform any of the above methods of session processing based on instructions stored in the memory.
According to an aspect of some embodiments of the present disclosure, a non-transitory computer-readable storage medium is proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of any one of the above session processing methods.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is a flow diagram of some embodiments of a session processing method of the present disclosure.
Fig. 2 is a schematic diagram of some embodiments of a session processing method of the present disclosure.
Fig. 3A is a flow diagram of further embodiments of a session processing method of the present disclosure.
Fig. 3B is a flow diagram of still other embodiments of a session processing method of the present disclosure.
Fig. 4 is a schematic diagram of some embodiments of a session processing method of the present disclosure.
Fig. 5 is a schematic diagram of some embodiments of a user plane functionality system of the present disclosure.
Fig. 6 is a schematic diagram of further embodiments of a user plane functionality system of the present disclosure.
Fig. 7 is a schematic diagram of further embodiments of user plane functionality systems of the present disclosure.
Detailed Description
The technical solution of the present disclosure is further described in detail by the accompanying drawings and examples.
A flow diagram of some embodiments of a session handling method of the present disclosure is shown in fig. 1.
In step 120, the UPF system obtains a user presence request from the SMF entity. In some embodiments, after the user sends the online request, the SMF entity receiving the online request sends the user online request to the UPF system, applies for the user to be online, and establishes a user session to the UPF system. In some embodiments, the user on-line request from the SMF may be received and processed by a signaling plane processing unit of the UPF system.
In step 130, the UPF system determines the target user plane processing unit based on the load status of the user plane processing unit. In some embodiments. The UPF system comprises a plurality of user plane processing units, each user plane processing unit corresponds to a first address, and the first address is an access network side address of the UPF system. In some embodiments, the first address is an N3 address of the UPF system, and N3 is an interface between the UPF system and the radio access network RAN.
In some embodiments, the UPF system may select a target user plane processing unit from among the user plane processing units in order of high to low idle resource amount according to the load status of the user plane processing units, and by such a method, a user plane processing unit that is relatively idle can be selected to carry traffic of a new online user, thereby implementing load balancing.
In step 140, the target user plane processing unit determines a target second address from the corresponding second address pool. In some embodiments, each user plane processing unit corresponds to a second address pool, and the second address is a data network side address of the UPF system.
In some embodiments, the second address is an N6 address of the UPF system, and N6 is an interface between the UPF system and the DN.
In some embodiments, the intersection of the second addresses in the second address pools corresponding to different user plane processing units is empty, so that when a user interacts with the data network, the user plane processing unit performing processing can be uniquely determined according to the second addresses, traffic processing burden is reduced, processing efficiency is improved, the user plane processing unit processing traffic sent to the same user can be uniquely determined, and bidirectional traffic of the same user only appears in one user plane processing unit.
In step 150, the UPF system feeds back the destination second address and the destination first address corresponding to the destination user plane processing unit to the SMF for the user to communicate with the data network DN based on the destination first address and the destination second address.
By the method, when the user is on line, the UPF system distributes the user plane processing units which are relatively fixed for the user based on the consideration of load balance, and different users establish sessions to different user plane processing units, so that the flow of the same user only appears in one user plane processing unit, the accuracy and convenience of user information statistics are improved, and the method is favorable for meeting the service requirements of speed limitation, charging, policy application and the like of the flow of subsequent users.
In some embodiments, a schematic diagram of some embodiments of a user plane processing unit and a signaling plane processing unit of a UPF system during user on-line is shown in fig. 2.
In 23, the signaling plane processing unit 21 receives a user on-line request from the SMF for establishing a user session.
At 24, the signaling plane processing unit queries the user traffic load of each user plane processing unit in the UPF system, and selects a relatively idle user plane processing unit. For example, if the user plane processing unit 221 is in a busy state, the user plane processing unit 222 is in an idle state, and the user plane processing unit 223 is in a congestion state, the user plane processing unit 222 is selected as the target user plane processing unit. In some embodiments, each user plane processing unit may update its own load condition to the signaling plane processing unit in time, so that the signaling plane processing unit accurately selects the most idle user plane processing unit.
In some embodiments, the signaling plane processing unit obtains the N3 address of the target user plane processing unit as the target first address and sends an instruction to the user plane processing unit. The user plane processing unit receiving the instruction selects one N6 address from its N6 address pool as a target second address, and feeds back the target second address to the signaling plane processing unit 21.
At 25, the signaling plane processing unit 21 feeds back the target first address and the target second address to the SMF.
The inventor finds that the user plane service type of the UPF network element belongs to the ICT (Information and Communications Technology) convergence class service, and IT has both the characteristics and requirements (such as general hardware, containerization, distribution, etc.) of the IT (Information Technology) class service and the characteristics and requirements (such as stability, throughput capacity, etc.) of the CT (Communications Technology) class service. Therefore, for consideration of the load balancing technology in the distributed deployment scenario of the user plane traffic processing service of the UPF network element, IT is necessary to perform from two directions, namely an IT technology and a CT technology, to ensure that requirements in the two aspects of the IT and the CT are met. In the IT application load balancing technology in the related technology, a load balancing mode similar to nginx or k8s is adopted, service is provided through a virtual address and service distribution is carried out, and under an ICT fusion scene of UPF, the processing performance of user traffic cannot meet the user access requirement; in the related art, a CT forwarding load balancing technique is implemented by a Link load sharing mode of an ECMP (Equal Cost Multi-path) or an LACP (Link Aggregation Control Protocol), and for an ICT fusion scenario, load sharing based on a user cannot be achieved, so that it is difficult to integrally Control a system in practical application.
Based on the method in the above embodiment of the present disclosure, it can be determined which user plane processing unit carries the data traffic of the user by the N3 and N6 addresses allocated to the user; and the signaling plane processing unit is used for inquiring the current state of each processing unit of the user plane and selecting the user plane processing unit in an idle state, so that the load balance of each user can be realized when a plurality of users access, the load balance can be realized aiming at the ICT fusion type service, the processing performance guarantee capability and the differentiated service capability of the user flow are improved, the subsequent processing difficulty is reduced, and the flow transmission efficiency is improved.
In some embodiments, after the configuration of the user online is completed, a flowchart of other embodiments of the session processing method of the present disclosure is shown in fig. 3A.
In step 361, the UPF system obtains first traffic from the DN side. In some embodiments, the flow rate is obtained through N6.
In step 362, the UPF system determines a corresponding first user plane processing unit according to the destination address carried in the first traffic. In some embodiments, the destination address carried in the first traffic is a first address, such as an N3 address.
In step 363, the UPF system sends the first traffic to a first user plane processing unit included in the system for processing.
In some embodiments, the above steps 361-363 may be performed by an access switch (TOR) of the UPF system.
In step 364, the first user plane processing unit sends the first traffic to the user.
By the method in the embodiment, the UPF system can determine the user plane processing unit for processing the traffic data of the user according to the destination address of the traffic sent to the user by the data network, and further forward the traffic data, thereby realizing load balancing with low time complexity; meanwhile, based on the fact that different user plane processing units in the same UPF system have different N3 addresses, the flow data sent to the user can be processed through the same user plane processing unit, flow of the user can be controlled and supervised conveniently, and the difficulty of user service control is reduced.
In some embodiments, after the configuration of the user online is completed, a flowchart of other embodiments of the session processing method of the present disclosure is shown in fig. 3B.
In step 371, the UPF system obtains second traffic from the access network side. In some embodiments, the traffic is obtained over an N3 interface.
In step 372, a second address pool to which the destination address belongs is determined according to the destination address of the second traffic, and a corresponding second user plane processing unit is determined. In some embodiments, the destination address carried in the second traffic is a second address, such as an N6 address. In some embodiments, the corresponding second user plane processing unit may be determined by searching an N6 address pool to which the second address belongs based on pre-stored N6 address pool information of each user plane processing unit.
In step 373, the second traffic is sent to the second user plane processing unit.
In some embodiments, the above steps 371-373 may be performed by an access switch of the UPF system.
In step 374, the second user plane processing unit sends the second traffic to the DN.
By the method in the above embodiment, the UPF system can determine the user plane processing unit that processes the traffic data of the user according to the destination address of the traffic of the data network sent by the access network, and further forward the traffic data, and can implement load balancing with low time complexity; meanwhile, based on the characteristic that N6 address pools of different user plane processing units in the same UPF system do not have intersection, the flow data sent by the same user can be processed by the same user plane processing unit, which is beneficial to controlling and monitoring the flow of the user and reduces the difficulty of user service control.
In some embodiments, the session processing method of the present disclosure further includes establishing a BGP neighbor between the user plane processing unit and the TOR, and setting different N3 interface addresses and N6 address pools in different user plane processing units, and issuing the N3 interface addresses and the N6 address pools to the TOR. In some embodiments, the access switch obtains a first address and a second address pool of each user plane processing unit, for example, based on BGP, configures the first address on each user plane processing unit, and configures the second address pool, and the access switch obtains address and address pool information by issuing the first address and the second address pool of the user plane processing unit at the access switch; the access switch generates the routing information of each user plane processing unit according to the second address and the first address, and establishes BGP neighbors of the access switch and each user plane processing unit. In some embodiments, as shown in fig. 4, on the TOR, three pieces of routing information are received for each of three N3 interface addresses, and a route to the three N3 interface addresses is generated according to Metric, for example:
2.2.2.1/32 192.168.1.2
3.3.3.1/32 192.168.1.3
4.4.4.1/32 192.168.1.4
the routing information in the figures and above is merely an example and does not constitute an undue limitation of the present application.
At this time, for a certain specific N3 address, the user traffic is forwarded to a specific user plane traffic processing unit by the TOR, so that various problems caused by ECMP can be fundamentally avoided.
By the method, BGP neighbor relations are established between the access switch and each user plane processing unit, and the generated routing information is used for realizing flow routing, so that load balance among the user plane processing units is realized.
A schematic diagram of some embodiments of a user plane functionality system of the present disclosure is shown in fig. 5.
The user plane function system comprises a signaling plane processing unit 51 and user plane processing units 521-52n, wherein n is a positive integer larger than 1.
The signaling plane processing unit 51 is able to obtain a user on-line request from the SMF entity. In some embodiments, after the user sends the online request, the SMF entity receiving the online request sends the user online request to the UPF system, applies for the user to be online, and establishes a user session to the UPF system. In some embodiments, the user on-line request from the SMF may be received and processed by a signaling plane processing unit of the UPF system. Further, the signaling plane processing unit 51 determines a target user plane processing unit according to the load status of the user plane processing unit. In some embodiments, the signaling plane processing unit 51 may select a target user plane processing unit from the user plane processing units according to the load status of the user plane processing units in the order from high to low of the amount of free resources, so as to implement load balancing.
The user plane processing unit can determine a target second address according to a second address pool corresponding to the user plane processing unit when the user plane processing unit is selected as the target user plane processing unit. In some embodiments, the signaling plane processing unit 51 may send an instruction to the selected target user plane processing unit to determine the target second address, so as to trigger the user plane processing unit to determine the target second address. In some embodiments, each user plane processing unit corresponds to a first address, and the first address is an access network side address of the UPF system; each user plane processing unit corresponds to a second address pool, and the second address is a data network side address of the UPF system. In some embodiments, the first address is an N3 address between the UPF system and the radio access network RAN; the second address is an N6 address between the UPF system and the DN.
The signaling plane processing unit 51 is also capable of feeding back the target second address and the target first address corresponding to the target user plane processing unit to the SMF, so that the user communicates with the data network DN according to the target first address and the target second address.
The user plane function system can distribute the relatively fixed user plane processing unit for the user based on the consideration of load balance when the user is on line by the UPF system, so that the flow of the same user only appears in one user plane processing unit, the accuracy and convenience of user information statistics are improved, and the service requirements of speed limitation, charging, strategy application and the like of the flow of subsequent users are favorably met.
In some embodiments, as shown in fig. 5, the user plane function system further includes an access switch 53, which is capable of acquiring a first traffic from the DN side, determining a corresponding first user plane processing unit according to a destination address carried in the first traffic, and further sending the first traffic to the first user plane processing unit included in the system for processing. The user plane processing unit receives the first flow and sends the first flow to the user.
The UPF system can determine a user plane processing unit for processing the traffic data of the user according to the destination address of the traffic sent to the user by the data network, and further forwards the traffic data, thereby realizing load balance with lower time complexity; meanwhile, based on the characteristic that different user plane processing units in the same UPF system have different N3 addresses, the flow data sent to the user can be processed by the same user plane processing unit, which is beneficial to controlling and supervising the flow of the user and reduces the difficulty of user service control.
In some embodiments, the access switch 53 is capable of acquiring the second traffic from the access network side; and determining a second address pool to which the destination address belongs according to the destination address of the second flow, determining a corresponding second user plane processing unit, and sending the second flow to the second user plane processing unit. And the user plane processing unit receiving the second flow sends the second flow to the DN.
The UPF system can determine a user plane processing unit for processing the flow data of the user according to the destination address of the flow of the data network sent by the access network, and further forwards the flow data, thereby realizing load balance with lower time complexity; meanwhile, based on the characteristic that N6 address pools of different user plane processing units in the same UPF system do not have intersection, the flow data sent by the same user can be processed by the same user plane processing unit, which is beneficial to controlling and monitoring the flow of the user and reducing the difficulty of user service control.
In some embodiments, the access switch 53 is further capable of obtaining the first address and the second address pool of each of the user plane processing units, generating routing information for each of the user plane processing units according to the second address pool and the first address, and establishing BGP neighbors of the access switch and each of the user plane processing units.
In the UPF system, a BGP neighbor relationship is established between the access switch and each user plane processing unit, and traffic routing is implemented using the generated routing information, thereby implementing load balancing among the user plane processing units.
A schematic structural diagram of an embodiment of the user plane function system of the present disclosure is shown in fig. 6. The user plane functionality system comprises a memory 601 and a processor 602. Wherein: the memory 601 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used for storing the instructions in the corresponding embodiments of the session handling method above. Processor 602 is coupled to memory 601 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 602 is configured to execute the instructions stored in the memory, so as to improve accuracy and convenience of user information statistics, and facilitate meeting service requirements of subsequent users, such as speed limit, charging, policy application, and the like.
In one embodiment, as also shown in FIG. 7, a user plane functionality system 700 includes a memory 701 and a processor 702. Processor 702 is coupled to memory 701 through BUS BUS 703. The user plane functionality system 700 may also be coupled to external storage 705 via the storage interface 704 for use in invoking external data, and may also be coupled to a network or another computer system (not shown) via the network interface 706. And will not be described in detail herein.
In the embodiment, the data instruction is stored in the memory, and the processor processes the instruction, so that the accuracy and convenience of user information statistics can be improved, and the service requirements of subsequent users on traffic such as speed limit, charging, policy application and the like can be met.
In another embodiment, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiment of the session handling method. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the disclosure or equivalent substitutions for parts of the technical features may still be made; all such modifications are intended to be included within the scope of the claims of this disclosure without departing from the spirit thereof.
Claims (14)
1. A session processing method, comprising:
a user plane function UPF system acquires a user online request from a session management function SMF entity;
the UPF system determines a target user plane processing unit according to the load state of the user plane processing unit, wherein the UPF system comprises a plurality of user plane processing units, each user plane processing unit corresponds to a first address, and the first address is an access network side address of the UPF system;
the target user plane processing unit determines a target second address according to a corresponding second address pool, wherein each user plane processing unit corresponds to one second address pool, and the second address is a data network side address of the UPF system;
and the UPF system feeds back the target second address and the target first address corresponding to the target user plane processing unit to the SMF so that the user and the data network DN can communicate according to the target first address and the target second address.
2. The method of claim 1, wherein the UPF system determining a target user plane processing unit based on the load status of the user plane processing unit comprises:
and the UPF system selects the target user plane processing unit from the user plane processing units according to the load state of the user plane processing units and the sequence of the idle resource amount from high to low.
3. The method of claim 1, wherein an intersection of second addresses in a second address pool corresponding to different user plane processing units is empty.
4. The method of claim 1, wherein the first address is an N3 address between the UPF system and a radio access network, RAN, and the second address is an N6 address between the UPF system and the DN.
5. The method of claim 1, further comprising:
the UPF system acquires a first flow from the DN side;
determining a corresponding first user plane processing unit according to a destination address carried in the first flow;
sending the first traffic to the first user plane processing unit;
and the first user plane processing unit sends the first flow to a user.
6. The method of claim 1, further comprising:
the UPF system acquires a second flow from an access network side;
determining a second address pool to which the destination address belongs according to the destination address of the second flow, and determining a corresponding second user plane processing unit;
sending the second traffic to the second user plane processing unit;
and the second user plane processing unit sends the second traffic to the DN.
7. The method of claim 1, further comprising:
an access switch of the UPF system acquires a first address pool and a second address pool of each user plane processing unit;
and the access switch generates routing information for each user plane processing unit according to the first address and the second address pool, and establishes a Border Gateway Protocol (BGP) neighbor of the access switch and each user plane processing unit.
8. The method of claim 7, further comprising at least one of:
after acquiring a first traffic from N6, the access switch determines a corresponding first user plane processing unit according to the routing information and a destination address carried in the first traffic, and sends the first traffic to the first user plane processing unit; or
After the access switch acquires the second traffic from N3, the access switch determines a second address pool to which the destination address belongs according to the destination address of the second traffic, determines a corresponding second user plane processing unit, and sends the second traffic to the second user plane processing unit.
9. A user plane functionality system comprising:
the signaling plane processing unit is configured to acquire a user online request from the SMF entity and determine a target user plane processing unit according to the load state of the user plane processing unit; feeding back a target second address fed back by the target user plane processing unit and a target first address corresponding to the target user plane processing unit to the SMF so that a user and a data network DN can communicate according to the target first address and the target second address, wherein the UPF system comprises a plurality of user plane processing units, each user plane processing unit corresponds to a first address, and the first address is an access network side address of the UPF system;
and the user plane processing unit is configured to determine a target second address according to a corresponding second address pool when the signaling plane processing unit determines that the target user plane processing unit is the target user plane processing unit, wherein each user plane processing unit corresponds to one second address pool, and the second address is a data network side address of the UPF system.
10. The user plane functionality system of claim 9, further comprising:
an access switch configured to:
acquiring a first flow from the DN side;
determining a corresponding first user plane processing unit according to a destination address carried in the first flow;
sending the first traffic to the first user plane processing unit;
the user plane processing unit is further configured to send the first traffic to a user.
11. The user plane functionality system of claim 9, further comprising:
an access switch configured to:
acquiring a second flow from an access network side;
determining a second address pool to which the destination address belongs according to the destination address of the second flow, and determining a corresponding second user plane processing unit;
sending the second traffic to the second user plane processing unit;
the user plane processing unit is further configured to send the second traffic to the DN.
12. The user plane function system of claim 10 or 11, wherein the access switch is further configured to:
acquiring a first address pool and a second address pool of each user plane processing unit;
and generating routing information for each user plane processing unit according to the first address pool and the second address, and establishing a Border Gateway Protocol (BGP) neighbor of the access switch and each user plane processing unit.
13. A user plane functionality system comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-8 based on instructions stored in the memory.
14. A non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 8.
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