WO2023155669A1 - 用户平面功能的选择方法及设备 - Google Patents

用户平面功能的选择方法及设备 Download PDF

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Publication number
WO2023155669A1
WO2023155669A1 PCT/CN2023/073604 CN2023073604W WO2023155669A1 WO 2023155669 A1 WO2023155669 A1 WO 2023155669A1 CN 2023073604 W CN2023073604 W CN 2023073604W WO 2023155669 A1 WO2023155669 A1 WO 2023155669A1
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WO
WIPO (PCT)
Prior art keywords
information
node
service
upf
network element
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PCT/CN2023/073604
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English (en)
French (fr)
Inventor
付月霞
陆璐
孙滔
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2023155669A1 publication Critical patent/WO2023155669A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/09—Management thereof
    • H04W28/0958—Management thereof based on metrics or performance parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic

Definitions

  • the present application relates to the technical field of mobile communication, in particular to a method and device for selecting a User Plane Function (UPF).
  • UPF User Plane Function
  • the present application relates to the technical field of mobile communication, and in particular to a computing power processing network system, business processing method and equipment.
  • the network system for computing power processing is sometimes referred to as a computing power-aware network, a computing power network, a computing-network integrated network, or a new type of computing network fusion network.
  • cloud computing and edge computing From the development trend of cloud computing and edge computing, in the future society, computing power of different scales will be distributed at different distances close to users, and provide users with various personalized services through the global network. From tens of billions of smart terminals, to billions of global home gateways, to thousands of edge clouds with computing capabilities brought by future edge computing in every city, and dozens of large-scale computing centers in each country
  • the cloud data center DC forms massive ubiquitous computing power and connects to the Internet from everywhere, forming a development trend of deep integration of computing and network.
  • the computing resources in the network are integrated into every corner of the network, so that each network node can become a provider of resources, and the user's request can be satisfied by calling the nearest node resource, which is no longer limited to a specific node, avoiding the connection and waste of network scheduling resources.
  • the traditional network is only a channel for data communication, which is based on connections and is subject to a fixed network addressing mechanism, which often cannot meet the higher and more stringent Quality of Experience (QoE) requirements.
  • QoE Quality of Experience
  • the traditional client (client)-server (server) model is deconstructed, and the application on the server side is deconstructed into functional components and deployed on the cloud platform, which is uniformly scheduled by the API gateway and can be implemented on demand. Dynamic instantiation, the business logic in the server is transferred to the client side, the client only needs to care about the computing function itself, and does not need to care about computing resources such as servers, virtual machines, containers, etc., so as to realize the service function able.
  • next-generation network architecture for the future network needs to consider the needs of the fusion and evolution of network transmission resources and computing resources (or computing power resources), so as to realize the global optimization of the network in the ubiquitous connection and computing power architecture, and the flexible scheduling of computing power , a reasonable distribution of business.
  • the traditional network architecture is difficult to realize the coordinated work of computing resources and network transmission resources.
  • At least one embodiment of the present application provides a method and device for selecting a user plane function, which can select a user plane function that meets service requirements, and improve service processing quality and processing efficiency.
  • an embodiment of the present application provides a method for selecting a user plane function UPF, including:
  • the first network element receives a first message sent by the first UPF for indicating reselection of the UPF for the first service;
  • the first network element reselects a second UPF serving the first service according to the first information of the first service and/or computing power information sent by at least one UPF.
  • the first message carries at least one of the following information: first terminal information that initiates the first service; a service identifier of the first service; first information of the first service; Demand information of the first service.
  • the first network element returns the UPF reselection result of the first service.
  • the first network element returns the UPF reselection result of the first service, including:
  • the first network element sends a second message for indicating the second UPF to a first terminal, where the first terminal is a terminal that initiates the first service.
  • the first network element sends the first information of the first service to the second UPF.
  • the first network element receives computing power information sent by at least one UPF, and the computing power information includes at least one of the following information: computing power identification, service identification, computing power location information, service location information, and computing power real-time information , Service real-time information.
  • the method before receiving the first message, the method further includes:
  • the first network element receives a session establishment request for the first service sent by the first terminal;
  • the first network element selects the first UPF closest to the first terminal, and sends a third message indicating the first UPF to the first terminal, so that the first terminal initiates a A session establishment process of the first service.
  • the embodiment of the present application also provides a method for selecting a user plane function, including:
  • the target UPF receives the first information of the first service
  • the target UPF according to the computing power information and the first information of the first service, if there is no local node that satisfies the first service, sends an instruction to the first network element to indicate reselection of the first service First message from UPF.
  • the first message carries at least one of the following information: first terminal information that initiates the first service; a service identifier of the first service; first information of the first service; Demand information of the first service.
  • the target UPF selects a first target node from the local nodes satisfying the first service if there are local nodes satisfying the first service;
  • the target UPF sends a session establishment request for the first service of the first terminal to the first target node.
  • the target UPF receives the first information of the first service, including at least one of the following:
  • the target UPF receives the first information of the first service sent by the first terminal during the establishment of the session of the first service
  • the target UPF receives first information about the first service sent by the first network element.
  • the target UPF receives the computing power information sent by the local node
  • the target UPF sends the computing power information of the local node to the first network element.
  • the embodiment of the present application also provides a method for selecting user plane functions, including:
  • the first network element receives node information of at least one node
  • a first target node is selected according to the node information of the at least one node, and the first UPF connected to the first target node is used as the UPF serving the first terminal.
  • the first network element receives node information of at least one node, including:
  • the first network element receives a second session establishment request of the first service of the first terminal, and acquires first information of the first service;
  • the first network element sends a first analysis request to a second network element, the first analysis request carries first information about the first service, and receives the second network element according to the first service At least one of the first information, network information, and computing power information is calculated to obtain node information of at least one node.
  • acquiring the first information of the first service includes at least one of the following:
  • the first information of the first service is obtained by parsing the second session establishment request.
  • the node information is used to indicate the comprehensive performance of the node
  • the selecting the first target node according to the node information of the at least one node includes:
  • the DNAI list includes each node, the data network access identifier DNAI, UPF of the node, and corresponding node information;
  • a first target node, a first DNAI related to the first target node, and a first UPF are selected from the DNAI list.
  • the first network element sends a first request for indicating reselection of UPF and node
  • the first network element receives node information of at least one node recalculated in combination with the current location of the first terminal;
  • the first network element reselects the second UPF and the second target node according to the recalculated node information of at least one node.
  • the first network element sends a session release request for releasing the first session, and the session release request carries indication information of the second DNAI to which the second target node belongs, so as to indicate that the The first network element corresponding to the second DNAI reestablishes the second session of the first service.
  • the embodiment of the present application also provides a method for selecting a user plane function, including:
  • the second network element calculates and obtains node information of at least one node according to at least one of the first information of the first service, network information, and node computing power information;
  • the second network element returns node information of the at least one node, so as to select a UPF serving the first terminal and a target node.
  • the method before calculating the node information of the at least one node, the method further includes:
  • the second network element subscribes to the computing power information of the node from the AF, and receives the computing power information of the node sent by the AF; or,
  • the second network element obtains the computing power information of the node from the core network network manager.
  • the second network element subscribes network data to a designated network function, and receives network information sent by a relevant network function.
  • the embodiment of the present application further provides a first network element, including a transceiver and a processor, wherein,
  • the transceiver is configured to receive a first message sent by the first UPF for indicating UPF reselection for the first service;
  • the processor is configured to reselect a second UPF serving the first service according to the first information of the first service and the computing power information sent by at least one UPF.
  • the embodiment of the present application further provides a first network element, including: a processor, a memory, and a program stored in the memory and executable on the processor, the program is processed by the processor.
  • a first network element including: a processor, a memory, and a program stored in the memory and executable on the processor, the program is processed by the processor.
  • the embodiment of the present application further provides a UPF, including a transceiver and a processor, wherein,
  • the transceiver is configured to receive first information of a first service
  • the processor is configured to, according to the computing power information and the first information of the first service, if there is no local node that satisfies the first service, send a message indicating that it is the first network element to the first network element.
  • the embodiment of the present application also provides a UPF, including: a processor, a memory, and a program stored in the memory and operable on the processor, when the program is executed by the processor.
  • a UPF including: a processor, a memory, and a program stored in the memory and operable on the processor, when the program is executed by the processor.
  • the embodiment of the present application further provides a first network element, including a transceiver and a processor, wherein,
  • the transceiver is configured to receive node information of at least one node
  • the processor is configured to select a first target node according to the node information of the at least one node, and use the first UPF connected to the first target node as the UPF serving the first terminal.
  • the embodiment of the present application further provides a first network element, including: a processor, a memory, and a program stored in the memory and operable on the processor, the program being processed by the processor implement the steps of the method as described in the third aspect when the controller is executed.
  • the embodiment of the present application further provides a second network element, including a transceiver and a processor, wherein,
  • the transceiver is configured to receive a first analysis request, where the first analysis request carries first information about a first service of a first terminal;
  • the processor is configured to calculate and obtain node information of at least one node according to at least one of the first information of the first service, network information, and node computing power information; the second network element returns the at least one node
  • the node information is used to select a UPF and a target node serving the first terminal.
  • the embodiment of the present application further provides a second network element, including: a processor, a memory, and a program stored in the memory and operable on the processor, the program being executed by the The processor implements the steps of the method described in the fourth aspect when executed.
  • the embodiment of the present application provides a computer-readable storage medium, where a program is stored on the computer-readable storage medium, and when the program is executed by a processor, the steps of the above method are implemented.
  • the method and device for selecting user plane functions provided by the embodiments of the present application can select user plane functions that meet service requirements, and improve service processing quality and processing efficiency.
  • FIG. 1 is a flowchart of a method for selecting a user plane function according to an embodiment of the present application
  • FIG. 2 is another flow chart of a method for selecting a user plane function according to an embodiment of the present application
  • Fig. 3 is an example diagram of a node registering computing power information with UPF according to the embodiment of the present application
  • FIG. 4 is an interaction example diagram of a method for selecting a user plane function according to an embodiment of the present application
  • FIG. 5 is another flow chart of a method for selecting a user plane function according to an embodiment of the present application.
  • FIG. 6 is another flowchart of a method for selecting a user plane function according to an embodiment of the present application.
  • Fig. 7 is an example diagram of node computing power information registration in the embodiment of the present application.
  • Fig. 8 is another example diagram of registration of node computing power information in the embodiment of the present application.
  • FIG. 9 is another interaction example diagram of a method for selecting a user plane function according to an embodiment of the present application.
  • Fig. 10 is an example diagram of the NWDAF analysis DN performance of the embodiment of the present application.
  • FIG. 11 is an example diagram of interaction between reselecting a UPF and a destination node according to an embodiment of the present application
  • FIG. 12 is a schematic structural diagram of a first network element according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a first network element according to another embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a UPF according to an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a UPF according to another embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a first network element according to an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a first network element according to another embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a second network element according to an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a second network element according to another embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a first network element according to another embodiment of the present application.
  • Fig. 21 is a schematic structural diagram of a UPF or a second network element according to another embodiment of the present application.
  • a computing power processing network system which can also be called a computing power sensing network, a computing power network, a computing network integrated network, or a new type of computing network fusion network.
  • Computing power nodes refer to devices with computing capabilities, which are used to provide computing power resources, which are equivalent to processing computing tasks in the network system of computing power processing, such as server equipment and all-in-one computers in data centers.
  • the computing power nodes in this embodiment of the application may also include network transmission equipment, such as routers.
  • computing power nodes are sometimes referred to simply as nodes.
  • Computing power information refers to information such as the computing power status and deployment location of the computing power nodes deployed in the computing power processing network system.
  • the computing power information can be indicated by the parameters of computing power resources.
  • the parameters of computing power resources specifically include one or more of the number of service connections, CPU/GPU computing power, deployment form (physical, virtual), deployment location (such as corresponding IP address), storage capacity, storage form and other parameters.
  • Computing power information can also be computing power abstracted based on computing power resources, which is used to reflect information such as the currently available computing power, distribution location, and deployment form of each computing power node in the computing power processing network system.
  • Network information refers to the network resources for the transmission information of the network system processed by computing power, which may specifically include various forwarding devices (such as routers, switches), transmission links, and transmission capabilities (such as with Width, delay, delay jitter), etc.
  • forwarding devices such as routers, switches
  • transmission links such as with Width, delay, delay jitter
  • the existing technology does not consider how the computing power demand of the business is transmitted to the core network, and how to realize computing power-aware scheduling in the core network.
  • Existing solutions do not consider the problems caused by the mobility of mobile access users. At present, what is usually considered is the problem that the user initiates a service request for the first time. Therefore, it is necessary to study the end-to-end computing power network mechanism and support multiple access methods to achieve at least one of the following goals:
  • the existing technology only supports selecting the UPF closest to the user, but the embodiment of the present application further selects the UPF and DNAI that meet the service requirements for the user equipment.
  • an embodiment of the present application provides a method for selecting user plane functions, which can select user plane functions that meet service requirements, and improve service processing quality and processing efficiency.
  • a method for selecting a user plane function provided by an embodiment of the present application, when applied to a first network element includes:
  • Step 11 the first network element receives a first message sent by the first UPF for indicating reselection of the UPF for the first service.
  • the first network element may be a network element of the core network, such as a session management function (Session Management Function, SMF).
  • SMF Session Management Function
  • UPF Policy Control Function
  • PCF Policy Control Function
  • Application Function Application Function
  • AF Access and Mobility Management Function
  • NWDAF Network Data Analytics Function
  • the first UPF may send the above-mentioned first message to the first network element to request the first network element to serve as the second One business chooses another UPF.
  • Step 12 the first network element reselects a second UPF serving the first service according to the first information of the first service and/or the computing power information sent by at least one UPF.
  • the first network element uses the pre-acquired computing power information of at least one UPF to and is the first information of the first service, reselecting a UPF (herein referred to as the second UPF) for the first service to meet the computing power requirement of the first service.
  • the second UPF a UPF
  • the first information of the first service may specifically be computing power requirement information of the first service.
  • the first information of the first service may also be demand information of the first service.
  • the first information of the first service may also be information related to the demand of the first service or the computing power demand of the first service.
  • the computing power information sent by the UPF may be information directly or indirectly related to the computing power, and can directly or indirectly reflect the computing power of the UPF.
  • the embodiment of the present application can re-select a more suitable second UPF for the first business to serve the first business when the first UPF cannot meet the computing power requirements of the first business, thereby It is possible to select user plane functions that meet service requirements, and improve service processing quality and processing efficiency.
  • the first message may carry at least one of the following information: first terminal information (such as terminal identifier, etc.) that initiates the first service; the first The service identifier of the service; the first information of the first service; the demand information of the first service, etc.
  • first terminal information such as terminal identifier, etc.
  • the first message when the first message carries the first information of the first service, there may be multiple feasible implementation manners.
  • a business puts forward a demand it may only propose computing power demand information or computing power demand-related information, or it may propose demand information/demand-related information.
  • the demand information/demand-related information may further include computing power demand and network demand, etc. Other requirements may be included.
  • the first message received by the first network element may directly carry the computing power demand information/computing power demand related information of the first service, so that the first network element may directly use at least the computing power demand information of the first service UPF reselection based on power demand information/computing power demand related information.
  • the first information of the first service may include the demand information of the first service/relevant information of the demand information, and the first network element performs UPF reselection at least according to the demand information/requirement-related information of the first service .
  • the first network element performs UPF reselection at least according to the demand information/requirement-related information of the first service .
  • the first message may also carry the demand information of the first service, so that the first network element can read the computing power demand information/computing power demand-related information in the demand information/requirement information-related information, and at least according to the calculation
  • the power demand information/computing power demand-related information (that is, the first information of the first service) is used to perform UPF reselection.
  • the first network element may also receive computing power information sent by at least one UPF, so as to obtain Obtain the computing power information of each UPF.
  • the computing power information may include at least one of the following information: computing power identification, service identification, computing power location information, service location information, computing power real-time information, service real-time information, and the like.
  • the real-time computing power information may specifically include computing power load information, response time, and the like.
  • the real-time service information may specifically include service load information, response time, and the like.
  • the first network element may also return the UPF reselection result of the first service. For example, the first network element sends a second message for indicating the second UPF to the first terminal, and the first terminal is the terminal that initiates the first service, thereby instructing the first terminal to re-initiate the second UPF Session establishment process.
  • the second message sent by the first network element to the first terminal may specifically be sent to the first terminal through multiple network element devices in the network.
  • the embodiment of the present application can also use the first information of the first service Sent to the second UPF.
  • the first network element may send the first information of the first service to the second UPF, or it may be that the first terminal Send the first information of the first service to the second UPF.
  • the first network element selects the first UPF for the first service of the first terminal. If the first UPF cannot meet the requirements of the first service, the first UPF can request The element sends the above-mentioned first message, thereby triggering UPF reselection.
  • the first network element may select a UPF closest to the first terminal according to a selection manner in the prior art.
  • the above method of the embodiment of the present application further includes the following steps: the first network element receives the session establishment request for the first service sent by the first terminal; A first UPF closest to the terminal sends a third message for instructing the first UPF to the first terminal, so that the first terminal initiates a session establishment process of the first service to the first UPF.
  • the method for selecting user plane functions provided by the embodiment of the present application when applied to the UPF side, includes:
  • Step 21 the target UPF receives the first information of the first service.
  • the target UPF may be the first UPF or the second UPF above, that is, the target UPF may be the UPF first selected by the first network element for the first service (ie, the first UPF above) , it can also be that the first network element reselects the first UPF when the first UPF cannot meet the requirements of the first service UPF (that is, the second UPF above).
  • the target UPF receives the first information of the first service, which may include at least one of the following:
  • the target UPF receives the first information of the first service sent by the first terminal during the establishment of the session of the first service
  • the target UPF receives the first information of the first service sent by the first network element.
  • the target UPF when the target UPF is the first UPF, the target UPF may receive the first information of the first service sent by the first terminal when the first terminal initiates a session establishment process to the first UPF.
  • the UPF may receive the first information of the first service sent by the first terminal when the first terminal initiates session establishment to the first UPF, or, The target UPF receives the first information of the first service sent by the first network element.
  • Step 22 the target UPF sends an instruction to the first network element to the first network element if there is no local node satisfying the first service according to the computing power information and/or the first information of the first service The first message of UPF reselection by the first service.
  • the local node of each UPF can register its computing power information with the UPF it is connected to, so that the target UPF can receive the computing power information sent by the local node, and then, the target UPF can use the pre-acquired local node computing power information to determine whether there is a local node that can meet the computing power requirements of the first business.
  • the computing power information includes at least one of the following information: computing power identification, service identification, computing power location information, service location information, computing power real-time information, service real-time information, and the like.
  • the target UPF triggers the first network element to reselect a new UPF to serve the first service when the local node cannot meet the service computing power demand, so that the user plane function that meets its computing power demand can be selected for the service in time , Improve business processing quality and processing efficiency.
  • the target UPF determines that there are local nodes that can satisfy the first service locally, then the first target node may be selected from the local nodes that satisfy the first service ; Then, the target UPF sends a session establishment request for the first service of the first terminal to the first target node.
  • the first message carries at least one of the following information: first terminal information that initiates the first service; a service identifier of the first service; first information of the first service; said Requirement information of the first service, etc., to help the first network element reselect the UPF.
  • the target UPF may also send the computing power information of the local node to the first network element, so as to help the first network element select a UPF with reference to the computing power information of the local node of the UPF.
  • FIG. 3 shows an example diagram of nodes (computing power nodes) registering computing power information with UPF in the above embodiment.
  • Each node can register its computing power information with UPF through the computing power registration/computing power announcement message.
  • Fig. 3 only schematically shows a local node connected to each UPF, of course, there may be more nodes in this embodiment of the present application.
  • the first network element of the core network such as the SMF in the 5GC, can subscribe computing power information to each UPF, and each UPF can send the computing power information of the local node through periodic or aperiodic computing power registration messages or computing power subscription notification messages. sent to the first network element.
  • the computing power node sends computing power information to the nearest connected UPF.
  • UPF When UPF sends information to 5GC (such as SMF), in addition to sending traditional network information, it also reports the computing power information of the connected node. Optionally, it can be sent in two steps, first sending the computing power/service ID, and then sending the real-time information of the computing power/service.
  • 5GC e.g SMF
  • 5GC generates and maintains UPF and computing power/service topology information of the entire network.
  • FIG. 4 shows an example diagram of an interaction process between network elements in the method of the above embodiment. in:
  • each UPF (such as the first and second UPFs) perform computing power registration and notification to the UPF connected to the node, and send the node computing power information to the UPF connected to it.
  • Each UPF can also send the computing power information of the nodes connected to the UPF to the first network element.
  • the first network element such as SMF
  • the first network element first selects the UPF closest to the UE according to the usual implementation method of the prior art, that is, selects the UPF closest to the UE (here, it is assumed to be the first UPF ) and notify the UE of the first UPF information.
  • the UE accesses the designated first UPF and carries the computing power requirement information of the service.
  • the first UPF judges whether the local node can meet the computing power requirements of the business, and if so, determines the destination node for processing the business, and forwards the business to the destination node that can meet its computing power requirements; if not If it is satisfied, a notification message is sent to the first network element to trigger UPF relocation (UPF relocation) of the first network element and instruct the first network element to reselect the UPF.
  • UPF relocation UPF relocation
  • the first network element selects a UPF (here assumed to be the second UPF) that can meet the computing power requirement according to the computing power information of the nodes connected to each UPF and the computing power demand information of the service, and sends the indication information of the second UPF to the UE, to instruct the UE to access the second UPF.
  • the first network element may also send a notification message carrying service computing power requirement information to the second UPF, or the UE may carry the service computing power requirement information when accessing the second UPF.
  • the second UPF judges whether the local node can meet the computing power requirements of the business, If it is satisfied, determine the destination node for processing the service, and forward the service to the destination node that can meet its computing power requirements; if it is not satisfied, send a notification message to the first network element, and continue to trigger the UPF reselection of the first network element (UPF relocation).
  • each UPF collects the computing power information of the nodes, and judges whether the computing power requirements of the business can be met, and selects the target node serving the business, so it can be called a distributed user plane function selection method.
  • the following embodiments of the present application also provide a centralized method for selecting user plane functions.
  • the first network element performs centralized selection to select a UPF and a target node for a service.
  • FIG. 5 another method for selecting user plane functions provided by the embodiment of the present application includes:
  • Step 51 the first network element receives node information of at least one node.
  • the first network element may specifically be network elements such as SMF and/or PCF.
  • the node information is used to indicate the comprehensive performance of the node.
  • the overall performance of a node can be calculated based on the computing power demand information of the business to be executed, the network information of the node, and the computing power information of the node.
  • scoring the network information of the node the network information of the node may include the network information between the node and the terminal; according to the degree to which the computing power information of the node satisfies the computing power demand of the first business, the computing power information of the node is evaluated. Scoring; then, weighted and summed the scores of the network information of the node and the score of the computing power information to obtain the comprehensive performance of the node.
  • the embodiment of the present application does not limit the specific algorithm for calculating the comprehensive performance.
  • the comprehensive performance of a node is used to indicate the matching degree between the network information and computing power information of the node and the business to be executed. Nodes with better comprehensive performance can better meet the needs of the business to be executed.
  • Step 52 Select a first target node according to the node information of the at least one node, and use the first UPF connected to the first target node as the UPF serving the first terminal.
  • the first network element selects the target node and UPF for the terminal, so that the selected target node and UPF can be used to serve the terminal. Since the comprehensive performance of the node is considered in the selection process, this application implements For example, user plane functions that meet their computing power requirements can be selected for terminals and services, and the processing quality and efficiency of services can be improved.
  • the first network element may also send a first session establishment request for the first service of the first terminal to the first UPF, and the first session establishment request carries the Instruction information of the first target node, to instruct the first target node to provide corresponding services.
  • the first network element may receive the node information of at least one node sent by the second network element, and the second network element may specifically be a network element such as NWDAF.
  • the first network element may receive the second session establishment request of the first service of the first terminal, obtain the first information of the first service, and then send the first analysis request to the second network element , the first analysis request carries the first information of the first service, and receives the calculation by the second network element according to at least one of the first information of the first service, network information, and computing power information Get the node information of at least one node.
  • the first network element to obtain the first information of the first service, specifically including at least one of the following:
  • UDR Unified Data Repository
  • AF application function
  • the first network element may send a request message to the UDR to request the first information of the first service; the UDR returns the first information of the first service to the first network element in response to the request message.
  • the second session establishment request may also be directly parsed from the second session establishment request.
  • the node information is used to indicate the comprehensive performance of the node.
  • the first network element may generate a DNAI list according to the node information of the at least one node, and the DNAI list includes each node, a data network access identifier (DN Access Identifier, DNAI) of the node, a UPF and the corresponding node information. Then, the first network element selects from the DNAI list The first target node, the first DNAI and the first UPF related to the first target node. For example, the node with the best overall performance indicated by the node information is selected as the first target node.
  • the first UPF is the UPF connected to the first target node.
  • the DNAI list may be generated by the PCF and sent to the SMF; the SMF selects the first target node and the first target node related to the first target node according to the DNAI list. DNAI and first UPF.
  • the terminal may cause UPF switching due to reasons such as movement.
  • the terminal is still connected to the original target node after the UPF is switched.
  • the original target node may no longer be the optimal node. Therefore, the embodiment of the present application considers switching the target node when switching the UPF. Specifically include:
  • the first network element sends a first request for instructing reselection of a UPF and a node. For example, the first network element sends a first UPF reselection request for reselecting a UPF to the second network element when the connection between the first terminal and the first DNAI is interrupted.
  • the first network element receives node information of at least one node that is recalculated in combination with the current location of the first terminal. For example, the first network element receives node information of at least one node that is recalculated by the second network element with respect to the current location of the first terminal.
  • the first network element reselects a second UPF and a second target node according to the recalculated node information of at least one node;
  • the first network element sends a session release request for releasing the first session, where the session release request carries indication information of the second DNAI to which the second target node belongs, so as to indicate selection of the first session
  • the first network element corresponding to the two DNAIs re-establishes the second session of the first service.
  • the first network element sends a session release request for releasing the first session to an access and mobility management function (Access and Mobility Management Function, AMF), and the session release request carries the second DNAI
  • AMF Access and Mobility Management Function
  • the instruction information is used to instruct the AMF to select the first network element corresponding to the second DNAI to re-establish the second session of the first service.
  • the first network element in the above step 51 is the first network element corresponding to the first DNAI, and for the convenience of distinction, the first network element is called the first selected network element.
  • the first network element corresponding to the second DNAI in step d is referred to as the second selected network element for ease of distinction.
  • the aforementioned first selected network element and the second selected network element may not be the same network element.
  • the method for selecting user plane functions provided by the embodiment of this application, when applied to the second network element side includes:
  • Step 61 the second network element receives a first analysis request, where the first analysis request carries first information about a first service of a first terminal.
  • the second network element may specifically be a network element such as NWDAF.
  • the second network element may receive the first analysis request sent by the first network element, and the first network element may specifically be a network element such as SMF and/or PCF.
  • Step 62 The second network element calculates and obtains node information of at least one node according to at least one of the first information of the first service, network information, and node computing power information.
  • the node information is used to indicate the comprehensive performance of the node.
  • the comprehensive performance of the node can be calculated according to the first information of the first service, the network information of the node, and the computing power information of the node. For example, score the network information of the node, which may include the network information between the node and the first terminal; The information is scored; then, the score of the node's network information and the score of the computing power information are weighted and summed to obtain the comprehensive performance of the node.
  • the embodiment of the present application does not limit the specific algorithm for calculating the comprehensive performance.
  • the comprehensive performance of a node is used to indicate the matching degree between the network information and computing power information of the node and the business to be executed. Nodes with better comprehensive performance can better meet the needs of the business to be executed.
  • Step 63 the second network element returns the node information of the at least one node, so as to select a UPF and a target node serving the first terminal.
  • the second network element may specifically send the node information of the at least one node to the network element that sends the first analysis request.
  • the second network element analyzes the node information to determine the comprehensive performance of the node, so that the target node and UPF can be selected for the terminal based on the node information, so that the selected target node and UPF can be used for
  • the terminal provides services, since the comprehensive performance of the node is considered in the selection process, it is possible to select the user plane function that meets its computing power requirements for the terminal and business, and improve the processing quality and efficiency of the business.
  • the second network element before calculating the node information of the at least one node, may also subscribe to the computing power information of the node to the AF, and receive the computing power information of the node sent by the AF; or, the The second network element obtains the computing power information of the node from the network management of the core network. Through the above method, the second network element can obtain the computing power information of the node, and then calculate the node information.
  • the second network element may also subscribe network data to a designated network function, and receive network information sent by a related network function.
  • the specified network function is preset.
  • FIG. 7 and FIG. 8 show two examples of registration computing power information of nodes (computing power nodes) in the above embodiments.
  • the computing power nodes report the computing power information to the bearer network controller through the controller/distributed routing protocol, and the bearer network controller directly sends the computing power information to the core network management (OAM).
  • OAM core network management
  • it can be sent in two steps: first send computing power/service identification information, and then send computing power/service real-time information.
  • the core network management (OAM) generates and maintains UPF and computing power/service topology information of the entire network.
  • the computing power requirement information of the service is transmitted to the core network for auxiliary decision-making; optionally, the computing power requirement information of the service may be transmitted through the AF.
  • AF provides user plane latency requirements to the network, and the request also carries the computing power requirement information of the business.
  • a new Qos type is added to 5QI, which is used to transmit network information and business computing power demand information.
  • the first network element (such as SMF/PCF) can use the second network element (NWDAF) to execute a new network+computing scheduling strategy on the second network element (NWDAF).
  • NWDAF network element
  • FIG. 9 shows an interactive example diagram of user plane selection, including:
  • the PCF subscribes to the update information of the UDR.
  • the PCF can analyze the service experience of each UP path (UP path), and send the updated DNAI list and computing power demand information to the SMF.
  • SMF uses NWDAF to analyze DN performance (node information) one by one UP path, and generates a computing power-aware UPF selection strategy.
  • NWDAF uses NWDAF to analyze DN performance (node information) one by one UP path, and generates a computing power-aware UPF selection strategy.
  • SMF/PCF implements a new network + computing scheduling strategy in NWDAF, obtains network information and node computing power information (including computing power/service real-time information), and generates a computing power-aware UPF selection strategy.
  • the SMF selects a target UPF and establishes a session.
  • Figure 10 shows an example of SMF analyzing DN performance (node information) with the help of NWDAF Figures, including:
  • the consumer NF (such as SMF/PCF) sends an analysis request to the NWDAF, and the analysis request may carry identification information of the target service, identification of the target terminal, and other information;
  • the NWDAF subscribes to the AF the real-time status information of the target business, including the computing power demand information of the target business; the AF collects the business information, and returns the subscribed real-time status information of the target business to the NWDAF .
  • the NWDAF subscribes to the network information from a specific NF (network information provider), and receives the network information returned by the NF.
  • S33.NWDAF combines network information and real-time status information of services to provide the data required for consumption NF decision-making according to a given calculation strategy, such as calculating node information (comprehensive performance of nodes, such as comprehensive metric) based on given weight information And send to consumer NF.
  • PCF can combine the node information provided by NWDAF to generate a DNAI(s) list and provide it to SMF; SMF determines the joint optimal UPF and DNAI of the network and calculation according to the DNAI(s) list.
  • Figure 11 shows an example diagram of the interaction between reselecting the UPF and the destination node when the UPF is switched due to the change of the UE location, including:
  • uplink and downlink data are transmitted between the UE and UPF1.
  • SMF1 decides to relocate UPF (relocation UPF).
  • PCF1 initiates a request to NWDAF (not shown in the figure), acquires a target DNAI list recommended for the current UE and current location, and sends the acquired DNAI list to SMF1.
  • SMF1 reselects a target node and UPF (assumed to be UPF2) according to the DNAI list.
  • the SMF initiates a PDU session release request to the AMF.
  • the request does not carry the original DNAI information (that is, the information of the original target node), but carries new DNAI information (information of the reselected target node).
  • the request also includes a PDU session identifier (Session ID), which is used to indicate the original session information.
  • the AMF executes PDU session release, and releases the original session related to UPF1.
  • the UE initiates a new session, establishes a PDU session related to UPF2, and generates a new PDU session identifier.
  • the AMF selects a new SMF (assumed to be SMF2) to establish a PDU session according to the new DNAI information, and sends the new DNAI information to SMF2.
  • SMF2 combines novel DNAI information to select new UPF (assumed to be UPF2), establish a PDU session.
  • the computing power information of the computing power node is also considered.
  • the embodiments of the present application provide a computing power scheduling system that supports mobile user access and fixed-mobile fusion users, and realizes an end-to-end computing power scheduling method and system.
  • the core network computing power perception mechanism includes centralized and distributed multiple sensing methods to realize the dynamic perception of real-time application information by the core network.
  • the embodiment of the present application also realizes UPF selection based on multi-dimensional factors. For example, on the basis of selecting UPF based on network information such as distance, it introduces business computing power demand information and real-time computing power status information of service nodes, and comprehensively considers multi-dimensional factors to select the best UPF. Excellent UPF.
  • the embodiment of the present application also implements mobility support. By realizing the perception of user computing power requirements and computing power node status in the core network, it supports re-initiating the computing power-aware UPF reselection process after the user moves.
  • first network element 1200 including:
  • the first receiving module 1201 is configured to receive a first message sent by the first UPF for indicating UPF reselection for the first service;
  • the first selection module 1202 is configured to reselect a second UPF serving the first service according to the first information of the first service and/or computing power information sent by at least one UPF.
  • the first message carries at least one of the following information: first terminal information that initiates the first service; a service identifier of the first service; first information of the first service; Demand information of the first service.
  • the first network element further includes:
  • the first return module is configured to return the UPF reselection result of the first service.
  • the first return module is further configured to send a second message for indicating the second UPF to the first terminal, where the first terminal is the terminal that initiates the first service.
  • the first network element further includes:
  • the first sending module is configured to send the first information of the first service to the second UPF.
  • the first network element further includes:
  • the second receiving module is configured to receive computing power information sent by at least one UPF, where the computing power information includes at least one of the following information: computing power identification, service identification, computing power location information, service location information, computing power real-time Information, service real-time information.
  • the first network element further includes:
  • a third receiving module configured to receive a session establishment request for the first service sent by the first terminal before receiving the first message
  • the second selection module is configured to select a first UPF closest to the first terminal, and send a third message indicating the first UPF to the first terminal, so that the first terminal sends the first UPF to the first terminal.
  • a UPF initiates the session establishment process of the first service.
  • the device in this embodiment is the device corresponding to the above-mentioned method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • the embodiment of the present application also provides a first network element 1300, including: a transceiver 1301 and a processor 1302;
  • the transceiver 1301 is configured to receive a first message sent by the first UPF for indicating UPF reselection for the first service;
  • the processor 1302 is configured to reselect a second UPF serving the first service according to the first information of the first service and/or the computing power information sent by at least one UPF.
  • the first message carries at least one of the following information: first terminal information that initiates the first service; a service identifier of the first service; first information of the first service; Demand information of the first service.
  • the transceiver is further configured to return the UPF reselection result of the first service.
  • the transceiver is further configured to send a second message for indicating a second UPF to a first terminal, where the first terminal is a terminal that initiates the first service.
  • the transceiver is further configured to send the first information of the first service to the second UPF.
  • the transceiver is further configured to receive computing power information sent by at least one UPF, where the computing power information includes at least one of the following information: computing power identification, service identification, computing power location information, service location Information, computing power real-time information, service real-time information.
  • the transceiver is further configured to receive a session establishment request for the first service sent by the first terminal before receiving the first message;
  • the processor is further configured to select a first UPF closest to the first terminal, and send a third message indicating the first UPF to the first terminal, so that the first terminal sends The first UPF initiates a session establishment process of the first service.
  • the device in this embodiment is the device corresponding to the above-mentioned method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • UPF 1400 including:
  • a first receiving module 1401, configured to receive first information of a first service
  • the first sending module 1402 is configured to, according to the computing power information and/or the first information of the first service, if there is no local node satisfying the first service, send an instruction to the first network element The first message of UPF reselection for the first service.
  • the first message carries at least one of the following information: first terminal information that initiates the first service; a service identifier of the first service; first information of the first service; Demand information of the first service.
  • the UPF also includes:
  • a first selection module configured to select a first target node from local nodes satisfying the first service if there are local nodes satisfying the first service;
  • a second sending module configured to send a session establishment request for the first service of the first terminal to the first target node.
  • the first receiving module is further configured to receive the first information of the first service in at least one of the following ways:
  • the first network element When the first network element reselects the target UPF to serve the first service, receiving first information of the first service sent by the first network element.
  • the UPF also includes:
  • the second receiving module is used to receive computing power information sent by the local node
  • the third sending module is configured to send the computing power information of the local node to the first network element.
  • the device in this embodiment is the device corresponding to the above-mentioned method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • the embodiment of the present application also provides a UPF 1500, including: a transceiver 1501 and a processor 1502;
  • the transceiver 1501 is configured to receive first information of a first service
  • the processor 1502 is configured to, according to the computing power information and/or the first information of the first service, if there is no local node satisfying the first service, send an instruction to the first network element The first message of UPF reselection for the first service.
  • the first message carries at least one of the following information: first terminal information that initiates the first service; a service identifier of the first service; first information of the first service; Demand information of the first service.
  • the processor is further configured to select a first target node from local nodes satisfying the first service if there are local nodes satisfying the first service;
  • the transceiver is further configured to send a session establishment request for the first service of the first terminal to the first target node.
  • the transceiver is further configured to receive the first information of the first service in at least one of the following manners:
  • the first network element When the first network element reselects the target UPF to serve the first service, receiving first information of the first service sent by the first network element.
  • the transceiver is further configured to receive computing power information sent by the local node; and send the computing power information of the local node to the first network element.
  • the device in this embodiment is the device corresponding to the above-mentioned method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • the embodiment of the present application also provides a first network element 1600, including:
  • the first selection module 1602 is configured to select a first target node according to the node information of the at least one node, and use the first UPF connected to the first target node as the UPF serving the first terminal.
  • the first network element further includes:
  • a first sending module configured to send a first session establishment request for the first service of the first terminal to the first UPF, where the first session establishment request carries indication information of the first target node .
  • the first receiving module is further configured to: receive the second session establishment request of the first service of the first terminal, obtain the first information of the first service; send the first analysis to the second network element request, the first analysis request carries the first information of the first service, and receives at least one of the first information, network information, and computing power information of the first service according to the second network element Node information of at least one node is obtained through calculation.
  • the first receiving module is further configured to acquire the first information of the first service in at least one of the following ways, including at least one of the following:
  • the first information of the first service is obtained by parsing the second session establishment request.
  • the node information is used to indicate the comprehensive performance of the node
  • the first selection module is further configured to generate a DNAI list according to the node information of the at least one node, and the DNAI list includes each node, the data network access identifier DNAI, UPF of the node, and corresponding node information; A first target node, a first DNAI related to the first target node, and a first UPF are selected from the DNAI list.
  • the first network element further includes:
  • a second sending module configured to send a first request for indicating reselection of a UPF and a node
  • a second receiving module configured to receive node information of at least one node recalculated in conjunction with the current location of the first terminal
  • the second selection module is configured to reselect the second UPF and the second target node according to the recalculated node information of at least one node;
  • the third sending module is configured to send a session release request for releasing the first session, where the session release request carries indication information of the second DNAI to which the second target node belongs, so as to indicate that the second The first network element corresponding to the DNAI reestablishes the second session of the first service.
  • the device in this embodiment is the device corresponding to the above method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • the embodiment of the present application also provides a first network element 1700, including: a transceiver 1701 and a processor 1702;
  • the transceiver 1701 is configured to receive node information of at least one node
  • the processor 1702 is configured to select a first target node according to the node information of the at least one node, and use the first UPF connected to the first target node as the UPF serving the first terminal.
  • the transceiver is further configured to send a first session establishment request for the first service of the first terminal to the first UPF, where the first session establishment request carries the first Instructions for the target node.
  • the transceiver is further configured to receive the second session establishment request of the first service of the first terminal, obtain the first information of the first service; send the first analysis request to the second network element, and the The first analysis request carries first information of the first service, and the second network element receives at least one of the first information of the first service, network information, and computing power information and calculates at least Node information for a node.
  • the transceiver is further configured to acquire the first information of the first service in at least one of the following manners, including at least one of the following:
  • the first information of the first service is obtained by parsing the second session establishment request.
  • the node information is used to indicate the comprehensive performance of the node
  • the processor is further configured to generate a DNAI list according to the node information of the at least one node, the DNAI list includes each node, the node's data network access identifier DNAI, UPF, and corresponding node information; from the The first target node, the first DNAI and the first UPF related to the first target node are selected from the DNAI list.
  • the transceiver is further configured to send a first request for indicating reselection of a UPF and a node; receive node information of at least one node recalculated in conjunction with the current location of the first terminal;
  • the processor is further configured to reselect a second UPF and a second target node according to the recalculated node information of at least one node; send a session release request for releasing the first session, and the session release
  • the request carries indication information of the second DNAI to which the second target node belongs, so as to indicate to select the first network element corresponding to the second DNAI to reestablish the second session of the first service.
  • the device in this embodiment is the device corresponding to the above method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • the embodiment of this application also provides a second network element 1800, including:
  • the first receiving module 1801 is configured to receive a first analysis request, the first analysis request carrying first information of the first service of the first terminal;
  • the first calculation module 1802 is configured to calculate and obtain node information of at least one node according to at least one of first information of the first service, network information, and computing power information of the node;
  • the first sending module 1803 is configured to return node information of the at least one node, so as to select a UPF serving the first terminal and a target node.
  • the second network element further includes:
  • the first information acquisition module is configured to subscribe to the computing power information of the node to the AF before calculating the node information of the at least one node, and receive the computing power information of the node sent by the AF; or obtain the computing power information of the node from the core network management force information.
  • the second network element further includes:
  • the second information acquisition module is configured to subscribe network data to a specified network function and receive network information sent by a relevant network function before calculating the information of the at least one node.
  • the device in this embodiment is the device corresponding to the above-mentioned method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • the embodiment of the present application also provides a network device 1900, including: a transceiver 1901 and a processor 1902;
  • the transceiver 1901 is configured to receive a first analysis request, where the first analysis request carries first information about a first service of a first terminal;
  • the processor 1902 is configured to calculate and obtain node information of at least one node according to at least one of the first information of the first service, network information, and node computing power information; and return the node information of the at least one node , for selecting a UPF serving the first terminal and a target node.
  • the transceiver is further configured to, before calculating the node information of the at least one node, subscribe to the computing power information of the node to the AF, and receive the computing power information of the node sent by the AF; or, from the core network management office Obtain the computing power information of the node.
  • the transceiver is further configured to subscribe network data to a specified network function and receive network information sent by a relevant network function before calculating the information of the at least one node.
  • the device in this embodiment is the device corresponding to the above-mentioned method shown in FIG. Effect.
  • the above-mentioned equipment provided by the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same parts and beneficial effects in this embodiment as in the method embodiment will not be described in detail here. repeat.
  • the embodiment of the present application also provides a first network element 2000, including a processor 2001, a memory 2002, and a computer program stored in the memory 2002 and operable on the processor 2001, the computer program being When executed, the processor 2001 implements each process of the above-mentioned embodiment of the user plane function selection method shown in FIG. 1 or FIG. 4 , and can achieve the same technical effect. To avoid repetition, details are not repeated here.
  • the embodiment of the present application also provides a UPF or a second network element 2100, including a processor 2101, a memory 2102, and a computer program stored in the memory 2102 and operable on the processor 2101, the computer
  • a UPF or a second network element 2100 including a processor 2101, a memory 2102, and a computer program stored in the memory 2102 and operable on the processor 2101, the computer
  • the program is executed by the processor 2101, each process of the above-mentioned embodiment of the user plane function selection method shown in FIG. 2 or FIG. 5 can be realized, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.
  • the embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, each process of the above-mentioned user plane function selection method embodiment is implemented, and The same technical effect can be achieved, so in order to avoid repetition, details will not be repeated here.
  • the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.
  • the technical solution of the present application can be embodied in the form of a software product in essence or the part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to enable a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in various embodiments of the present application.
  • a terminal which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

Abstract

本申请实施例提供一种用户平面功能的选择方法及设备，该方法包括：第一网元接收第一UPF发送的用于指示为第一业务重选UPF的第一消息；所述第一网元根据所述第一业务的第一信息和/或至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。本申请能够选择符合业务需求的用户面功能，提高业务的处理质量和处理效率。

Description

用户平面功能的选择方法及设备
相关申请的交叉引用
本申请基于申请号为202210141104.9、申请日为2022年02月16日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以全文引入的方式引入本申请。
技术领域
本申请涉及移动通信技术领域，具体涉及一种用户平面功能(User Plane Function，UPF)的选择方法及设备。
背景技术
本申请涉及移动通信技术领域，具体涉及一种算力处理的网络系统、业务处理方法及设备。所述算力处理的网络系统有时也称为算力感知网络、算力网络、算网一体网络或者计算网络融合的新型网络等名称。
从云计算、边缘计算的发展大趋势下，未来社会中会在靠近用户的不同距离遍布许多不同规模的算力，通过全球网络为用户提供各类个性化的服务。从百亿量级的智能终端，到全球十亿量级的家庭网关，再到每个城市中未来边缘计算带来的数千个具备计算能力的边缘云，以及每个国家数十个大型的云数据中心DC，形成海量的泛在算力从各处接入互联网，形成计算和网络深度融合的发展趋势。
网络中的计算资源融入到网络的各个角落，使每一个网络节点都可以成为资源的提供者，用户的请求可以通过调用最近的节点资源来满足，不再局限于某一特定节点，避免造成连接和网络调度资源的浪费。而传统的网络只是提供数据通信的管道，以连接为基础，受制于固定的网络寻址机制，在更高更苛刻的体验质量(Quality of Experience，QoE)要求下往往无法满足。此外随着微服务的发展，传统的客户机(client)-服务器(server)模式被解构，服务器侧的应用解构成功能组件布放在云平台上，由API网关统一调度，可以做到按需动态实例化，服务器中的业务了逻辑转移到客户机侧，客户机只需要关心计算功能本身，而无需关心服务器、虚拟机、容器等计算资源，从而实现服务功 能。
面向未来网络的新一代网络架构需协同考虑网络传输资源和计算资源(或者称之为算力资源)融合演进的需求，实现泛在连接和算力架构中网络的全局优化，算力的灵活调度，业务的合理分布。目前，传统的网络架构难以实现算力资源与网络传输资源的协同工作。
发明内容
本申请的至少一个实施例提供了一种用户平面功能的选择方法及设备，能够选择符合业务需求的用户面功能，提高业务的处理质量和处理效率。
为了解决上述技术问题，本申请是这样实现的：
第一方面，本申请实施例提供了一种用户平面功能UPF的选择方法，包括：
第一网元接收第一UPF发送的用于指示为第一业务重选UPF的第一消息；
所述第一网元根据所述第一业务的第一信息和/或至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。
可选的，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
可选的，还包括：
所述第一网元返回所述第一业务的UPF重选结果。
可选的，所述第一网元返回所述第一业务的UPF重选结果，包括：
所述第一网元向第一终端发送用于指示第二UPF的第二消息，所述第一终端为发起所述第一业务的终端。
可选的，还包括：
所述第一网元向所述第二UPF发送所述第一业务的第一信息。
可选的，还包括：
所述第一网元接收至少一个UPF发送的算力信息，所述算力信息包括以下信息中的至少一种：算力标识、服务标识、算力位置信息、服务位置信息、算力实时信息、服务实时信息。
可选的，在接收所述第一消息之前，所述方法还包括：
第一网元接收第一终端发送的针对第一业务的会话建立请求；
第一网元选择与所述第一终端距离最近的第一UPF，向所述第一终端发送用于指示所述第一UPF的第三消息，以使所述第一终端向第一UPF发起第一业务的会话建立过程。
第二方面，本申请实施例还提供了一种用户平面功能的选择方法，包括：
目标UPF接收第一业务的第一信息；
所述目标UPF根据算力信息和所述第一业务的第一信息，在不存在满足所述第一业务的本地节点的情况下，向第一网元发送用于指示为第一业务重选UPF的第一消息。
可选的，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
可选的，还包括：
所述目标UPF在存在满足所述第一业务的本地节点的情况下，从满足所述第一业务的本地节点中选择出第一目标节点；
所述目标UPF向所述第一目标节点发送针对所述第一终端的第一业务的会话建立请求。
可选的，所述目标UPF接收第一业务的第一信息，包括以下至少一种：
所述目标UPF接收第一终端在建立所述第一业务的会话过程中发送的第一业务的第一信息；
在所述第一网元重新选择了所述目标UPF为所述第一业务的服务的情况下，所述目标UPF接收所述第一网元发送的第一业务的第一信息。
可选的，还包括：
所述目标UPF接收本地节点发送的算力信息；
所述目标UPF将本地节点的算力信息发送给第一网元。
第三方面，本申请实施例还提供了一种用户面功能的选择方法，包括：
第一网元接收至少一个节点的节点信息；
根据所述至少一个节点的节点信息，选择出第一目标节点，并将所述第一目标节点连接的第一UPF作为为所述第一终端服务的UPF。
可选的，还包括：
向所述第一UPF发送针对所述第一终端的第一业务的第一会话建立请求，所述第一会话建立请求中携带有所述第一目标节点的指示信息。
可选的，所述第一网元接收至少一个节点的节点信息，包括：
所述第一网元接收第一终端的第一业务的第二会话建立请求，获取所述第一业务的第一信息；
所述第一网元向第二网元发送第一分析请求，所述第一分析请求携带有所述第一业务的第一信息，以及，接收所述第二网元根据所述第一业务的第一信息、网络信息和算力信息中的至少一个计算得到至少一个节点的节点信息。
可选的，获取所述第一业务的第一信息，包括以下至少一种：
获取统一数据存储库UDR中记录的第一业务的第一信息，其中，所述UDR记录的第一业务的第一信息来自于应用功能AF；
从所述第二会话建立请求中解析得到第一业务的第一信息。
可选的，所述节点信息用于指示节点的综合性能；
所述根据所述至少一个节点的节点信息，选择出第一目标节点，包括：
根据所述至少一个节点的节点信息，生成一个DNAI列表，所述DNAI列表包括有各个节点、节点的数据网络接入标识DNAI、UPF以及对应的节点信息；
从所述DNAI列表选择出第一目标节点、所述第一目标节点相关的第一DNAI和第一UPF。
可选的，还包括：
所述第一网元发送用于指示重选UPF和节点的第一请求；
所述第一网元接收结合所述第一终端的当前位置重新计算得到的至少一个节点的节点信息；
所述第一网元根据重新计算得到的至少一个节点的节点信息，重新选择出第二UPF和第二目标节点。
可选的，还包括：
所述第一网元发送用于释放所述第一会话的会话释放请求，所述会话释放请求携带有所述第二目标节点所属的第二DNAI的指示信息，以指示选择所述 第二DNAI对应的第一网元以重建所述第一业务的第二会话。
第四方面，本申请实施例还提供了一种用户面功能的选择方法，包括：
第二网元接收第一分析请求，所述第一分析请求携带有第一终端的第一业务的第一信息；
所述第二网元根据第一业务的第一信息、网络信息和节点的算力信息中的至少一个，计算得到至少一个节点的节点信息；
所述第二网元返回所述至少一个节点的节点信息，以用于选择为所述第一终端服务的UPF和目标节点。
可选的，在计算所述至少一个节点的节点信息之前，还包括：
所述第二网元向AF订阅节点的算力信息，接收AF发送的节点的算力信息；或者，
所述第二网元从核心网网管处获取节点的算力信息。
可选的，在计算所述至少一个节点的信息之前，还包括：
所述第二网元向指定网络功能订阅网络数据，接收相关网络功能发送的网络信息。
第五方面，本申请实施例还提供了一种第一网元，包括收发机和处理器，其中，
所述收发机，用于接收第一UPF发送的用于指示为第一业务重选UPF的第一消息；
所述处理器，用于根据所述第一业务的第一信息和至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。
第六方面，本申请实施例还提供了一种第一网元，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如第一方面所述的方法的步骤。
第七方面，本申请实施例还提供了一种UPF，包括收发机和处理器，其中，
所述收发机，用于接收第一业务的第一信息；
所述处理器，用于根据算力信息和所述第一业务的第一信息，在不存在满足所述第一业务的本地节点的情况下，向第一网元发送用于指示为第一业务重选UPF的第一消息。
第八方面，本申请实施例还提供了一种UPF，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如第二方面所述的方法的步骤。
第九方面，本申请实施例还提供了一种第一网元，包括收发机和处理器，其中，
所述收发机，用于接收至少一个节点的节点信息；
所述处理器，用于根据所述至少一个节点的节点信息，选择出第一目标节点，并将所述第一目标节点连接的第一UPF作为为所述第一终端服务的UPF。
第十方面，本申请实施例还提供了一种第一网元，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如第三方面所述的方法的步骤。
第十一方面，本申请实施例还提供了一种第二网元，包括收发机和处理器，其中，
所述收发机，用于接收第一分析请求，所述第一分析请求携带有第一终端的第一业务的第一信息；
所述处理器，用于根据第一业务的第一信息、网络信息和节点的算力信息中的至少一个，计算得到至少一个节点的节点信息；所述第二网元返回所述至少一个节点的节点信息，以用于选择为所述第一终端服务的UPF和目标节点。
第十二方面，本申请实施例还提供了一种第二网元，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如第四方面所述的方法的步骤。
第十三方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质上存储有程序，所述程序被处理器执行时，实现如上所述的方法的步骤。
与现有技术相比，本申请实施例提供的用户平面功能的选择方法及设备，能够选择符合业务需求的用户面功能，提高业务的处理质量和处理效率。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领 域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本申请实施例的用户平面功能的选择方法的一种流程图；
图2为本申请实施例的用户平面功能的选择方法的另一种流程图；
图3为本申请实施例的节点向UPF注册算力信息的一个示例图；
图4为本申请实施例的用户平面功能的选择方法的一种交互示例图；
图5为本申请实施例的用户平面功能的选择方法的又一种流程图；
图6为本申请实施例的用户平面功能的选择方法的又一种流程图；
图7为本申请实施例的节点算力信息注册的一个示例图；
图8为本申请实施例的节点算力信息注册的另一个示例图；
图9为本申请实施例的用户平面功能的选择方法的另一种交互示例图；
图10为本申请实施例的NWDAF分析DN性能的一种示例图；
图11为本申请实施例的重新选择UPF和目的节点的交互示例图；
图12为本申请一实施例的第一网元的结构示意图；
图13为本申请另一实施例的第一网元的结构示意图；
图14为本申请一实施例的UPF的结构示意图；
图15为本申请另一实施例的UPF的结构示意图；
图16为本申请一实施例的第一网元的结构示意图；
图17为本申请另一实施例的第一网元的结构示意图；
图18为本申请一实施例的第二网元的结构示意图；
图19为本申请另一实施例的第二网元的结构示意图；
图20为本申请又一实施例的第一网元的结构示意图；
图21为本申请又一实施例的UPF或第二网元的结构示意图。
具体实施方式
下面将参照附图更详细地描述本申请的示例性实施例。虽然附图中显示了本申请的示例性实施例，然而应当理解，可以以各种形式实现本申请而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本申请，并且能够将本申请的范围完整的传达给本领域的技术人员。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。说明书以及权利要求中“和/或”表示所连接对象的至少其中之一。
以下描述提供示例而并非限定权利要求中阐述的范围、适用性或者配置。可以对所讨论的要素的功能和布置作出改变而不会脱离本公开的精神和范围。各种示例可恰适地省略、替代、或添加各种规程或组件。例如，可以按不同于所描述的次序来执行所描述的方法，并且可以添加、省去、或组合各种步骤。另外，参照某些示例所描述的特征可在其他示例中被组合。
为帮助更好的理解本申请实施例的相关方案，下面对本申请实施例涉及的相关概念进行说明。
1)算力处理的网络系统，所述算力处理的网络系统也可以称为算力感知网络、算力网络、算网一体网络或者计算网络融合的新型网络等名称。
2)算力节点，是指具备计算能力的设备，用于提供算力资源，相当于算力处理的网络系统中处理计算任务的设备，例如数据中心的服务器设备、一体机等。另外，本申请实施例的算力节点也可以包括网络传输设备，如路由器等。本文中有时也将算力节点简称为节点。
3)算力信息，是指算力处理的网络系统中部署的算力节点的计算能力状态以及部署位置等信息，算力信息可以通过算力资源的参数进行指示。算力资源的参数具体包括服务连接数、CPU/GPU计算力、部署形态(物理、虚拟)、部署位置(如相应的IP地址)、存储容量、存储形态等参数中的一种或多种。算力信息还可以是基于算力资源抽象出来的计算能力，用于反映算力处理的网络系统中各个算力节点当前可用的计算能力、分布位置及部署形态等信息。
4)网络信息，是指指算力处理的网络系统的传输信息的网络资源，具体可以包括各种转发设备(如路由器、交换机)、传输链路以及传输能力(如带 宽、时延、时延抖动)等。
目前，现有技术并没有考虑业务的算力需求如何传递至核心网，以及在核心网内如何实现算力感知调度。现有方案也没有考虑移动接入用户移动性引起的问题，目前均考虑的通常都是用户首次发起服务请求的问题。因此，需要研究端到端算力网络机制，支持多种接入方式，以实现以下至少一个目的：
1、满足移动用户的算网联合调度优化需求；
2、用户移动后如何协同核心网选择一个新的算力节点；
现有技术只支持选择距离用户最近的UPF，本申请实施例则进一步为用户设备选择符合业务需求的UPF和DNAI。
为解决以上问题中的至少一个，本申请实施例提供了一种用户平面功能的选择方法，能够选择符合业务需求的用户面功能，提高业务的处理质量和处理效率。
请参照图1，本申请实施例提供的一种用户平面功能的选择方法，在应用于第一网元时，包括：
步骤11，第一网元接收第一UPF发送的用于指示为第一业务重选UPF的第一消息。
这里，第一网元可以是核心网的网元，如会话管理功能(Session Management Function，SMF)等。本文中，各种功能，如SMF、UPF、策略控制功能(Policy Control Function，PCF)、应用功能(Application Function，AF)、接入和移动管理功能(Access and Mobility Management Function，AMF)、网络数据分析功能(Network Data Analytics Function，NWDAF)等，也可以称作功能实体，如SMF为SMF实体，UPF为UPF实体，PCF为PCF实体，AF为AF实体，AMF为AMF实体等。
本申请实施例中，第一UPF可以在判断出本地不存在能够满足所述第一业务的本地节点的情况下，向第一网元发送上述第一消息，以请求第一网元重新为第一业务选择其他UPF。
步骤12，所述第一网元根据所述第一业务的第一信息和/或至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。
本申请实施例中，第一网元根据预先获得的至少一个UPF的算力信息以 及是第一业务的第一信息，为第一业务重新选择一个UPF(这里称之为第二UPF)，以满足所述第一业务的算力需求。
这里，所述第一业务的第一信息具体可以是第一业务的算力需求信息。第一业务的第一信息也可以是第一业务的需求信息。此外，第一业务的第一信息还可以是与第一业务的需求或第一业务的算力需求相关的信息。
所述UPF发送的算力信息可以是与算力直接或间接关联的信息，能够直接或间接的反映UPF的算力情况。
通过以上步骤，本申请实施例能够在第一UPF不能满足第一业务的算力需求的情况下，重新为第一业务选择更为合适的第二UPF，为所述第一业务进行服务，从而能够选择符合业务需求的用户面功能，提高业务的处理质量和处理效率。
为了便于第一网元进行UPF重选，所述第一消息可以携带有以下信息中的至少一种：发起所述第一业务的第一终端信息(如终端的标识等)；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息等。
其中，当第一消息中携带有第一业务的第一信息时，可能有多种可行的实施方式。由于业务提出需求时，可能仅提出算力需求信息或算力需求相关信息，也可能提出的是需求信息/需求相关信息，需求信息/需求相关信息进一步可以包含算力需求和网络需求等，也可以包括其他需求。那么一种情况可能为：在第一网元接收的第一消息中可以直接携带第一业务的算力需求信息/算力需求相关信息，以供第一网元直接至少根据第一业务的算力需求信息/算力需求相关信息来进行UPF的重选。一种情况可能为：第一业务的第一信息可以包含第一业务的需求信息/需求信息的相关信息，第一网元至少根据第一业务的需求信息/需求相关信息来进行UPF的重选。当然可能还有其他的情况，在此不再赘述。
当然，第一消息也可以携带的是第一业务的需求信息，以供第一网元读取需求信息/需求信息的相关信息中的算力需求信息/算力需求相关信息，并至少根据算力需求信息/算力需求相关信息(也即第一业务的第一信息)来进行UPF的重选。
另外，所述第一网元还可以接收至少一个UPF发送的算力信息，从而获 得各UPF的算力信息。具体的，所述算力信息可以包括以下信息中的至少一种：算力标识、服务标识、算力位置信息、服务位置信息、算力实时信息、服务实时信息等。所述算力实时信息具体可以包括算力负载信息、响应时间等。所述服务实时信息具体可以包括服务负载信息、响应时间等。
在上述步骤12之后，所述第一网元还可以返回所述第一业务的UPF重选结果。例如，所述第一网元向第一终端发送用于指示第二UPF的第二消息，所述第一终端为发起所述第一业务的终端，从而指示第一终端向第二UPF重新发起会话建立过程。这里，所述第一网元向第一终端发送的第二消息，具体可以经过网络中的多个网元设备最终被发送至所述第一终端。
为了便于第二UPF判断其是否能够满足第一业务的算力需求，或者，为了便于第二UPF为第一网元选择合适的目标节点，本申请实施例还可以将第一业务的第一信息发送给第二UPF。具体的，可以由所述第一网元向所述第二UPF发送所述第一业务的第一信息，还可以是在第一终端向第二UPF重新发起会话建立过程中，由第一终端将第一业务的第一信息发送给第二UPF。
本申请实施例中，在上述步骤11之前，第一网元为第一终端的第一业务选择了第一UPF，如果第一UPF不能满足第一业务的需求，第一UPF可以向第一网元发送上述第一消息，从而触发UPF重选。在初次选择UPF时，第一网元可以按照现有技术的选择方式，选择距离第一终端最近的UPF。也就是说，在上述步骤11之前，本申请实施例的以上方法还包括以下步骤：第一网元接收第一终端发送的针对第一业务的会话建立请求；第一网元选择与所述第一终端距离最近的第一UPF，向所述第一终端发送用于指示所述第一UPF的第三消息，以使所述第一终端向第一UPF发起第一业务的会话建立过程。
请参照图2，本申请实施例提供的用户平面功能的选择方法，在应用于UPF侧时，包括：
步骤21，目标UPF接收第一业务的第一信息。
这里，所述目标UPF可以是上文中的第一UPF或第二UPF，即，所述目标UPF可以是第一网元首次为所述第一业务选择的UPF(即上文中的第一UPF)，还可以是第一网元在第一UPF不能满足第一业务的需求时重新选择出 的UPF(即上文中的第二UPF)。
所述目标UPF接收第一业务的第一信息，可以包括以下至少一种：
1)所述目标UPF接收第一终端在建立所述第一业务的会话过程中发送的第一业务的第一信息；
2)在所述第一网元重新选择了所述目标UPF为所述第一业务的服务的情况下，所述目标UPF接收所述第一网元发送的第一业务的第一信息。
例如，在所述目标UPF是所述第一UPF时，所述目标UPF可以在第一终端向第一UPF发起会话建立过程中，接收第一终端发送的第一业务的第一信息。
又例如，在所述目标UPF是所述第二UPF时，所述UPF可以在第一终端向第一UPF发起会话建立过程中，接收第一终端发送的第一业务的第一信息，或者，所述目标UPF接收所述第一网元发送的第一业务的第一信息。
步骤22，所述目标UPF根据算力信息和/或所述第一业务的第一信息，在不存在满足所述第一业务的本地节点的情况下，向第一网元发送用于指示为第一业务重选UPF的第一消息。
这里，每个UPF的本地节点可以向其所连接的UPF注册其算力信息，这样，所述目标UPF可以接收本地节点发送的算力信息，然后，所述目标UPF可以根据预先获得的本地节点的算力信息，判断是否存在能够满足第一业务算力需求的本地节点。所述算力信息包括以下信息中的至少一种：算力标识、服务标识、算力位置信息、服务位置信息、算力实时信息、服务实时信息等。
通过以上步骤，所述目标UPF在本地节点不能满足业务算力需求时，触发第一网元重新选择新的UPF为第一业务服务，从而能够及时为业务选择符合其算力需求的用户面功能，提高业务的处理质量和处理效率。
本申请实施例中，如果在步骤22中，所述目标UPF判断出本地存在能够满足所述第一业务的本地节点，则可以从满足所述第一业务的本地节点中选择出第一目标节点；然后，所述目标UPF向所述第一目标节点发送针对所述第一终端的第一业务的会话建立请求。
可选的，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述 第一业务的需求信息等，以帮助第一网元重新选择UPF。进一步的，所述目标UPF还可以将本地节点的算力信息发送给第一网元，以帮助第一网元在选择UPF时能够参考UPF的本地节点的算力信息进行选择。
图3给出了以上实施例中节点(算力节点)向UPF注册算力信息的一个示例图。各个节点(算力节点)可以通过算力注册/算力通告消息向UPF注册其算力信息。图3中仅示意性的示出了与每个UPF连接的一个本地节点，当然本申请实施例还可以有更多的节点。核心网的第一网元，如5GC中的SMF可以向各个UPF订阅算力信息，各个UPF可以通过周期性或非周期性的算力注册消息或算力订阅通告消息将本地节点的算力信息发送给第一网元。算力节点将算力信息发送至就近连接的UPF，UPF在向5GC(如SMF)发送信息时，除了发送传统的网络信息外，还上报所连接的节点的算力信息。可选的，可以分两步发送，首先发送算力/服务标识，再发送报算力/服务的实时信息。5GC(e.g SMF)生成并维护全网UPF和算力/服务的拓扑信息。
图4给出了以上实施例的方法在网元之间的交互流程的一个示例图。其中：
各个UPF(如第一、第二UPF)的节点向本节点连接的UPF进行算力注册和通告，将节点算力信息发送给其所连接的UPF。各个UPF还可以将本UPF连接的节点算力信息发送给第一网元。当UE向第一网元(如SMF)发起PDU会话建立过程时，第一网元先按照现有技术的通常实现方式，就近选择UPF，即选择与UE最近的UPF(这里假设为第一UPF)并将第一UPF的信息通知给UE。UE接入指定的第一UPF，并携带业务的算力需求信息。第一UPF在UE接入过程中，判断本地节点是否能满足业务的算力需求，如满足，则确定出处理业务的目的节点，将业务转发至能够满足其算力需求的目的节点；如不满足，则向第一网元发送通告消息，触发第一网元的UPF重选(UPF relocation)，指示第一网元重新选择UPF，该通告消息中可以携带第一业务的第一信息。第一网元根据各个UPF连接的节点的算力信息和业务的算力需求信息，选择能够满足算力需求的UPF(这里假设为第二UPF)，并向UE发送第二UPF的指示信息，以指示UE接入第二UPF。第一网元还可以向第二UPF发送携带有业务算力需求信息的通告消息，或者由UE在接入第二UPF时，携带业务算力需求信息。这样，第二UPF根据判断本地节点是否能满足业务的算力需求， 如满足，则确定出处理业务的目的节点，将业务转发至能够满足其算力需求的目的节点；如不满足，则向第一网元发送通告消息，继续触发第一网元的UPF重选(UPF relocation)。
另外需要指出的是，包括图3和图4在内的本申请实施例的各个图示中，为了更清楚的展示本申请实施例的改进点，省略了信息传输过程中所涉及的一些网元设备。也就是说，两个网元或设备之间的信息传输过程，可能是直接传输的，也可能是经过一个或多个中间网元之间的转发或信息转换等处理，最终将相关信息发送给目标网元。另外，关于建立PDU会话的更多细节，由于不涉及本申请的改进，为节约篇幅，本文没有详细说明，具体可以参考现有技术的相关实现。
以上实施例中，各个UPF处分别收集节点的算力信息，并判断是否能够满足业务的算力需求，选择为业务服务的目标节点，因此可以称作是一种分布式的用户平面功能的选择方法。
下面本申请实施例还提供了一种集中式的用户平面功能的选择方法，在该方法中，由第一网元来进行集中式的选择，为业务选择UPF及目标节点。
请参照图5，本申请实施例提供的另一种用户面功能的选择方法，包括：
步骤51，第一网元接收至少一个节点的节点信息。
这里，所述第一网元具体可以是SMF和/或PCF等网元。所述节点信息用于指示节点的综合性能。节点的综合性能可以根据待执行业务的算力需求信息、节点的网络信息以及节点的算力信息计算得到。例如，对节点的网络信息进行评分，节点的网络信息可以包括节点与终端之间的网络信息；根据节点的算力信息对第一业务的算力需求的满足程度，对节点的算力信息进行评分；然后，对节点的网络信息的评分和算力信息的评分进行加权求和，得到节点的综合性能。本申请实施例对计算综合性能的具体算法不做限定。通常来说，节点的综合性能用于指示节点的网络信息及算力信息与待执行业务的匹配程度，综合性能较好的节点，能够更好的满足待执行业务的需求。
步骤52，根据所述至少一个节点的节点信息，选择出第一目标节点，并将所述第一目标节点连接的第一UPF作为为所述第一终端服务的UPF。
通过以上步骤，由第一网元为终端选择出目标节点及UPF，从而可以利用所选择的目标节点和UPF为终端进行服务，由于在选择过程中考虑了节点的综合性能，因此，本申请实施例能够为终端和业务选择符合其算力需求的用户面功能，提高业务的处理质量和处理效率。
在上述步骤52之后，所述第一网元还可以向所述第一UPF发送针对所述第一终端的第一业务的第一会话建立请求，所述第一会话建立请求中携带有所述第一目标节点的指示信息，以指示所述第一目标节点提供相应的服务。在上述步骤51中，所述第一网元可以接收第二网元发送的至少一个节点的节点信息，所述第二网元具体可以是NWDAF等网元。
具体的，第一网元可以接收第一终端的第一业务的第二会话建立请求，获取所述第一业务的第一信息，然后，第一网元向第二网元发送第一分析请求，所述第一分析请求携带有所述第一业务的第一信息，以及，接收所述第二网元根据所述第一业务的第一信息、网络信息和算力信息中的至少一个计算得到至少一个节点的节点信息。
这里，第一网元获取所述第一业务的第一信息的方式有多种，具体包括以下至少一种：
1)获取统一数据存储库(Unified Data Repository，UDR)中记录的第一业务的第一信息，其中，所述UDR记录的第一业务的第一信息来自于应用功能(AF)，即AF将第一业务的第一信息发送给UDR，UDR接收并记录第一业务的第一信息。后续第一网元可以向UDR发送请求消息，以请求所述第一业务的第一信息；UDR响应于所述请求消息，向第一网元返回所述第一业务的第一信息。
2)从所述第二会话建立请求中解析得到第一业务的第一信息。这里，在第二会话建立请求中携带有第一业务的第一信息的情况下，也可以直接从述第二会话建立请求中解析得到第一业务的第一信息。
本申请实施例中，所述节点信息用于指示节点的综合性能。在步骤52中，第一网元可以根据所述至少一个节点的节点信息，生成一个DNAI列表，所述DNAI列表包括有各个节点、节点的数据网络接入标识(DN Access Identifier，DNAI)、UPF以及对应的节点信息。然后，第一网元从所述DNAI列表选择出 第一目标节点、所述第一目标节点相关的第一DNAI和第一UPF。例如，选择节点信息指示的综合性能最优的节点，作为所述第一目标节点。所述第一UPF则是第一目标节点连接的UPF。
在第一网元包括SMF和PCF的情况下，可以由PCF生成所述DNAI列表并发送给SMF；SMF根据所述DNAI列表，选择出第一目标节点、所述第一目标节点相关的第一DNAI和第一UPF。
终端可能因为发生移动等原因导致UPF切换。现有技术在这种情况下，仍然保持切换UPF后终端仍然连接至原目标节点。但是，原有的目标节点可能不再是最优的节点，因此，本申请实施例在切换UPF时同时考虑切换目标节点。具体包括：
a)所述第一网元发送用于指示重选UPF和节点的第一请求。例如，第一网元在第一终端与第一DNAI的连接中断的情况下，向所述第二网元发送用于重选UPF的第一UPF重选请求。
b)所述第一网元接收结合所述第一终端的当前位置重新计算得到的至少一个节点的节点信息。例如，所述第一网元接收所述第二网元针对所述第一终端的当前位置重新计算得到的至少一个节点的节点信息。
c)所述第一网元根据重新计算得到的至少一个节点的节点信息，重新选择出第二UPF和第二目标节点；
d)所述第一网元发送用于释放所述第一会话的会话释放请求，所述会话释放请求携带有所述第二目标节点所属的第二DNAI的指示信息，以指示选择所述第二DNAI对应的第一网元以重建所述第一业务的第二会话。例如，所述第一网元向接入和移动管理功能(Access and Mobility Management Function，AMF)发送用于释放所述第一会话的会话释放请求，所述会话释放请求携带有所述第二DNAI的指示信息，以指示所述AMF选择所述第二DNAI对应的第一网元以重建所述第一业务的第二会话。
上述步骤51中的第一网元是第一DNAI对应的第一网元，为了便于区分，将该第一网元称作第一选择网元。步骤d中的第二DNAI对应的第一网元，为了便于区分，将该第一网元称作第二选择网元。上述第一选择网元和第二选择网元可能不是同一个网元。
请参照图6，本申请实施例提供的用户面功能的选择方法，在应用第二网元侧时，包括：
步骤61，第二网元接收第一分析请求，所述第一分析请求携带有第一终端的第一业务的第一信息。
这里，所述第二网元具体可以是NWDAF等网元。所述第二网元可以是接收第一网元发送的第一分析请求，所述第一网元具体可以是SMF和/或PCF等网元。
步骤62，所述第二网元根据第一业务的第一信息、网络信息和节点的算力信息中的至少一个，计算得到至少一个节点的节点信息。
这里，所述节点信息用于指示节点的综合性能。节点的综合性能可以根据第一业务的第一信息、节点的网络信息以及节点的算力信息计算得到。例如，对节点的网络信息进行评分，节点的网络信息可以包括节点与第一终端之间的网络信息；根据节点的算力信息对第一业务的算力需求的满足程度，对节点的算力信息进行评分；然后，对节点的网络信息的评分和算力信息的评分进行加权求和，得到节点的综合性能。本申请实施例对计算综合性能的具体算法不做限定。通常来说，节点的综合性能用于指示节点的网络信息及算力信息与待执行业务的匹配程度，综合性能较好的节点，能够更好的满足待执行业务的需求。
步骤63，所述第二网元返回所述至少一个节点的节点信息，以用于选择为所述第一终端服务的UPF和目标节点。
这里，第二网元具体可以向发送所述第一分析请求的网元发送所述至少一个节点的节点信息。
通过以上步骤，本申请实施例由第二网元进行节点信息的分析，确定节点的综合性能，从而可以基于节点信息为终端选择出目标节点及UPF，从而可以利用所选择的目标节点和UPF为终端进行服务，由于在选择过程中考虑了节点的综合性能，因此，从而能够为终端和业务选择符合其算力需求的用户面功能，提高业务的处理质量和处理效率。
本申请实施例在计算所述至少一个节点的节点信息之前，所述第二网元还可以向AF订阅节点的算力信息，接收AF发送的节点的算力信息；或者，所 述第二网元从核心网网管处获取节点的算力信息。通过以上方式，第二网元能够获得节点的算力信息，进而计算节点信息。
本申请实施例在计算所述至少一个节点的节点信息之前，所述第二网元还可以向指定的网络功能订阅网络数据，接收相关网络功能发送的网络信息。所述指定的网络功能是预先设定的。
图7和图8给出了以上实施例中节点(算力节点)注册算力信息的两种示例图。图7中，算力节点将算力信息通过控制器/分布式路由协议上报至承载网控制器，由承载网控制器将算力信息直接发送至核心网网管(OAM)。可选的，可以分两步发送：先发送算力/服务标识信息，然后发送算力/服务的实时信息。核心网网管(OAM)生成并维护全网UPF和算力/服务的拓扑信息。
在以上实施例的用户平面的选择方法中，将业务的算力需求信息传递至核心网进行辅助决策；可选的，可以通过AF传递业务算力需求信息。例如，AF提供user plane latency requirements至网络，在该request中同时携带业务的算力需求信息。又例如，在5QI中新增一种Qos类型，用于传输网络信息也业务算力需求信息。
第一网元(如SMF/PCF)可以借助第二网元(NWDAF)，在第二网元(NWDAF)执行新的网络+计算的调度策略，通过获取的网络信息和算力信息(包括服务实时状态信息)，生成算力感知的UPF选择策略。图9给出了用户平面选择的一种交互示例图，包括：
S1，通过NEF在AF请求信息中携带业务的算力需求信息，将AF请求信息以及业务的算力需求信息存储至UDR。
S2，PCF订阅UDR的更新信息，PCF可以对每个UP路径(UP path)进行服务体验分析，并将更新后的DNAI列表和算力需求信息发送至SMF。
S3，SMF收到更新信息后，借助NWDAF逐UP path分析DN性能(节点信息)，生成算力感知的UPF选择策略。具体来讲，SMF/PCF借助NWDAF，在NWDAF执行新的网络+计算的调度策略，获取网络信息和节点的算力信息(包括算力/服务实时信息)，生成算力感知的UPF选择策略。
S4，SMF选择目标UPF，建立会话。
图10给出了SMF借助NWDAF分析DN性能(节点信息)的一个示例 图，包括：
S31，消费NF(如SMF/PCF)向NWDAF发送分析请求，分析请求里可以携带有目标业务的标识信息、目标终端的标识等信息；
S32a.NWDAF根据所述分析请求，向AF新增订阅所述目标业务的实时状态信息，包括目标业务的算力需求信息等；AF收集业务信息，并向NWDAF返回订阅的目标业务的实时状态信息。
S32b，NWDAF根据所述分析请求，向特定的NF(网络信息提供者订阅网络信息)，接收所述NF返回的网络信息。
S33.NWDAF结合网络信息、业务的实时状态信息，根据给定的计算策略，提供消费NF决策所需的数据，如根据给定权重信息，计算得到节点信息(节点的综合性能，如综合metric)并发送给消费NF。具体的，PCF可以结合NWDAF提供的节点信息，生成DNAI(s)列表并提供给SMF；SMF根据DNAI(s)列表，决定网络和计算联合最优的UPF和DNAI。
图11给出了当UE位置变化引起UPF切换后，重新选择UPF和目的节点的交互示例图，包括：
假设UE通过SMF1、UPF1建立了PDU会话，此时UE与UPF1之间进行上下行数据的传输。
111，当UE位置变化导致SMF1无法连接到原来的目标节点时，SMF1决定需要重新UPF(relocation UPF)。此时，PCF1向NWDAF发起请求(图中未示出)，获取针对当前UE、当前位置推荐的目的DNAI列表，并将获取的DNAI列表发送至SMF1。SMF1根据DNAI列表，重新选择一个目标节点和UPF(假设为UPF2)。
112，SMF向AMF发起PDU会话释放请求，该请求不携带原DNAI信息(即原目标节点的信息)，携带新的DNAI信息(重新选择的目标的节点的信息)。该请求中还包括了PDU会话标识(Session ID)，用于指示原会话信息。
113，AMF执行PDU会话释放，释放与UPF1相关的原会话。
114，UE发起新会话，建立与UPF2相关的PDU会话，生成新的PDU会话标识。AMF根据新的DNAI信息)选择新SMF(假设为SMF2)建立PDU会话，并将新的DNAI信息发送给SMF2。SMF2结合新的DNAI信息选择新 的UPF(假设为UPF2)，建立PDU会话。
通过以上步骤，UE移动后重新选择UPF时，不再默认连接至同一DN，除了考虑距离因素，同样考虑算力节点的算力信息。
从以上所述可以看出，本申请实施例提供了一种支持移动用户接入以及支持固移融合用户的算力调度系统，实现了端到端的算力调度方法与系统。其中，核心网算力感知机制包括有集中式和分布式多种感知方式，实现核心网对于应用实时信息的动态感知。本申请实施例还是实现了多维因素的UPF选择，例如，在基于距离等网络信息选择UPF的基础上，引入业务的算力需求信息、以及服务节点实时算力状态信息，综合考虑多维因素选择最优的UPF。另外，本申请实施例还实现了移动性支持，通过在核心网实现对于用户算力需求、算力节点状态的感知，支持用户移动后重新发起算力感知的UPF重选过程。
以上介绍了本申请实施例的各种方法。下面将进一步提供实施上述方法的装置。
请参考图12，本申请实施例还提供一种第一网元1200，包括：
第一接收模块1201，用于接收第一UPF发送的用于指示为第一业务重选UPF的第一消息；
第一选择模块1202，用于根据所述第一业务的第一信息和/或至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。
可选的，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
可选的，所述第一网元还包括：
第一返回模块，用于返回所述第一业务的UPF重选结果。
可选的，所述第一返回模块，还用于向第一终端发送用于指示第二UPF的第二消息，所述第一终端为发起所述第一业务的终端。
可选的，所述第一网元还包括：
第一发送模块，用于向所述第二UPF发送所述第一业务的第一信息。
可选的，所述第一网元还包括：
第二接收模块，用于接收至少一个UPF发送的算力信息，所述算力信息包括以下信息中的至少一种：算力标识、服务标识、算力位置信息、服务位置信息、算力实时信息、服务实时信息。
可选的，所述第一网元还包括：
第三接收模块，用于在接收所述第一消息之前，接收第一终端发送的针对第一业务的会话建立请求；
第二选择模块，用于选择与所述第一终端距离最近的第一UPF，向所述第一终端发送用于指示所述第一UPF的第三消息，以使所述第一终端向第一UPF发起第一业务的会话建立过程。
需要说明的是，该实施例中的设备是与上述应用于图1所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图13，本申请实施例还提供一种第一网元1300，包括：收发机1301和处理器1302；
所述收发机1301，用于接收第一UPF发送的用于指示为第一业务重选UPF的第一消息；
所述处理器1302，用于根据所述第一业务的第一信息和/或至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。
可选的，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
可选的，所述收发机，还用于返回所述第一业务的UPF重选结果。
可选的，所述收发机，还用于向第一终端发送用于指示第二UPF的第二消息，所述第一终端为发起所述第一业务的终端。
可选的，所述收发机，还用于向所述第二UPF发送所述第一业务的第一信息。
可选的，所述收发机，还用于接收至少一个UPF发送的算力信息，所述算力信息包括以下信息中的至少一种：算力标识、服务标识、算力位置信息、服务位置信息、算力实时信息、服务实时信息。
可选的，所述收发机，还用于在接收所述第一消息之前，接收第一终端发送的针对第一业务的会话建立请求；
所述处理器，还用于选择与所述第一终端距离最近的第一UPF，向所述第一终端发送用于指示所述第一UPF的第三消息，以使所述第一终端向第一UPF发起第一业务的会话建立过程。
需要说明的是，该实施例中的设备是与上述应用于图1所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图14，本申请实施例还提供一种UPF 1400，包括：
第一接收模块1401，用于接收第一业务的第一信息；
第一发送模块1402，用于根据算力信息和/或所述第一业务的第一信息，在不存在满足所述第一业务的本地节点的情况下，向第一网元发送用于指示为第一业务重选UPF的第一消息。
可选的，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
可选的，所述UPF还包括：
第一选择模块，用于在存在满足所述第一业务的本地节点的情况下，从满足所述第一业务的本地节点中选择出第一目标节点；
第二发送模块，用于向所述第一目标节点发送针对所述第一终端的第一业务的会话建立请求。
可选的，所述第一接收模块，还用于按照以下至少一种方式，接收第一业务的第一信息：
接收第一终端在建立所述第一业务的会话过程中发送的第一业务的第一信息；
在所述第一网元重新选择了所述目标UPF为所述第一业务的服务的情况下，接收所述第一网元发送的第一业务的第一信息。
可选的，所述UPF还包括：
第二接收模块，用于接收本地节点发送的算力信息；
第三发送模块，用于将本地节点的算力信息发送给第一网元。
需要说明的是，该实施例中的设备是与上述应用于图2所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图15，本申请实施例还提供一种UPF 1500，包括：收发机1501和处理器1502；
所述收发机1501，用于接收第一业务的第一信息；
所述处理器1502，用于根据算力信息和/或所述第一业务的第一信息，在不存在满足所述第一业务的本地节点的情况下，向第一网元发送用于指示为第一业务重选UPF的第一消息。
可选的，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
可选的，所述处理器，还用于在存在满足所述第一业务的本地节点的情况下，从满足所述第一业务的本地节点中选择出第一目标节点；
所述收发机，还用于向所述第一目标节点发送针对所述第一终端的第一业务的会话建立请求。
可选的，所述收发机，还用于按照以下至少一种方式，接收第一业务的第一信息：
接收第一终端在建立所述第一业务的会话过程中发送的第一业务的第一信息；
在所述第一网元重新选择了所述目标UPF为所述第一业务的服务的情况下，接收所述第一网元发送的第一业务的第一信息。
可选的，所述收发机，还用于接收本地节点发送的算力信息；将本地节点的算力信息发送给第一网元。
需要说明的是，该实施例中的设备是与上述应用于图2所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图16，本申请实施例还提供一种第一网元1600，包括：
第一接收模块1601，用于接收至少一个节点的节点信息；
第一选择模块1602，用于根据所述至少一个节点的节点信息，选择出第一目标节点，并将所述第一目标节点连接的第一UPF作为为所述第一终端服务的UPF。
可选的，所述第一网元还包括：
第一发送模块，用于向所述第一UPF发送针对所述第一终端的第一业务的第一会话建立请求，所述第一会话建立请求中携带有所述第一目标节点的指示信息。
可选的，所述第一接收模块，还用于：接收第一终端的第一业务的第二会话建立请求，获取所述第一业务的第一信息；向第二网元发送第一分析请求，所述第一分析请求携带有所述第一业务的第一信息，以及，接收所述第二网元根据所述第一业务的第一信息、网络信息和算力信息中的至少一个计算得到至少一个节点的节点信息。
可选的，所述第一接收模块，还用于按照以下至少一种方式，获取所述第一业务的第一信息，包括以下至少一种：
获取统一数据存储库UDR中记录的第一业务的第一信息，其中，所述UDR记录的第一业务的第一信息来自于应用功能AF；
从所述第二会话建立请求中解析得到第一业务的第一信息。
可选的，所述节点信息用于指示节点的综合性能；
所述第一选择模块，还用于根据所述至少一个节点的节点信息，生成一个DNAI列表，所述DNAI列表包括有各个节点、节点的数据网络接入标识DNAI、UPF以及对应的节点信息；从所述DNAI列表选择出第一目标节点、所述第一目标节点相关的第一DNAI和第一UPF。
可选的，所述第一网元还包括：
第二发送模块，用于发送用于指示重选UPF和节点的第一请求；
第二接收模块，用于接收结合所述第一终端的当前位置重新计算得到的至少一个节点的节点信息；
第二选择模块，用于根据重新计算得到的至少一个节点的节点信息，重新选择出第二UPF和第二目标节点；
第三发送模块，用于发送用于释放所述第一会话的会话释放请求，所述会话释放请求携带有所述第二目标节点所属的第二DNAI的指示信息，以指示选择所述第二DNAI对应的第一网元以重建所述第一业务的第二会话。
需要说明的是，该实施例中的设备是与上述应用于图5所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图17，本申请实施例还提供一种第一网元1700，包括：收发机1701和处理器1702；
所述收发机1701，用于接收至少一个节点的节点信息；
所述处理器1702，用于根据所述至少一个节点的节点信息，选择出第一目标节点，并将所述第一目标节点连接的第一UPF作为为所述第一终端服务的UPF。
可选的，所述收发机，还用于向所述第一UPF发送针对所述第一终端的第一业务的第一会话建立请求，所述第一会话建立请求中携带有所述第一目标节点的指示信息。
可选的，所述收发机，还用于接收第一终端的第一业务的第二会话建立请求，获取所述第一业务的第一信息；向第二网元发送第一分析请求，所述第一分析请求携带有所述第一业务的第一信息，以及，接收所述第二网元根据所述第一业务的第一信息、网络信息和算力信息中的至少一个计算得到至少一个节点的节点信息。
可选的，所述收发机，还用于按照以下至少一种方式，获取所述第一业务的第一信息，包括以下至少一种：
获取统一数据存储库UDR中记录的第一业务的第一信息，其中，所述UDR记录的第一业务的第一信息来自于应用功能AF；
从所述第二会话建立请求中解析得到第一业务的第一信息。
可选的，所述节点信息用于指示节点的综合性能；
所述处理器，还用于根据所述至少一个节点的节点信息，生成一个DNAI列表，所述DNAI列表包括有各个节点、节点的数据网络接入标识DNAI、UPF以及对应的节点信息；从所述DNAI列表选择出第一目标节点、所述第一目标节点相关的第一DNAI和第一UPF。
可选的，所述收发机，还用于发送用于指示重选UPF和节点的第一请求；接收结合所述第一终端的当前位置重新计算得到的至少一个节点的节点信息；
所述处理器，还用于根据重新计算得到的至少一个节点的节点信息，重新选择出第二UPF和第二目标节点；发送用于释放所述第一会话的会话释放请求，所述会话释放请求携带有所述第二目标节点所属的第二DNAI的指示信息，以指示选择所述第二DNAI对应的第一网元以重建所述第一业务的第二会话。
需要说明的是，该实施例中的设备是与上述应用于图5所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图18，本申请实施例还提供一种第二网元1800，包括：
第一接收模块1801，用于接收第一分析请求，所述第一分析请求携带有 第一终端的第一业务的第一信息；
第一计算模块1802，用于根据第一业务的第一信息、网络信息和节点的算力信息中的至少一个，计算得到至少一个节点的节点信息；
第一发送模块1803，用于返回所述至少一个节点的节点信息，以用于选择为所述第一终端服务的UPF和目标节点。
可选的，所述第二网元还包括：
第一信息获取模块，用于在计算所述至少一个节点的节点信息之前，向AF订阅节点的算力信息，接收AF发送的节点的算力信息；或者，从核心网网管处获取节点的算力信息。
可选的，所述第二网元还包括：
第二信息获取模块，用于在计算所述至少一个节点的信息之前，向指定网络功能订阅网络数据，接收相关网络功能发送的网络信息。
需要说明的是，该实施例中的设备是与上述应用于图6所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图19，本申请实施例还提供一种网络设备1900，包括：收发机1901和处理器1902；
所述收发机1901，用于接收第一分析请求，所述第一分析请求携带有第一终端的第一业务的第一信息；
所述处理器1902，用于根据第一业务的第一信息、网络信息和节点的算力信息中的至少一个，计算得到至少一个节点的节点信息；以及，返回所述至少一个节点的节点信息，以用于选择为所述第一终端服务的UPF和目标节点。
可选的，所述收发机，还用于在计算所述至少一个节点的节点信息之前，向AF订阅节点的算力信息，接收AF发送的节点的算力信息；或者，从核心网网管处获取节点的算力信息。
可选的，所述收发机，还用于在计算所述至少一个节点的信息之前，向指定网络功能订阅网络数据，接收相关网络功能发送的网络信息。
需要说明的是，该实施例中的设备是与上述应用于图6所示的方法对应的设备，上述各实施例中的实现方式均适用于该设备的实施例中，也能达到相同的技术效果。本申请实施例提供的上述设备，能够实现上述方法实施例所实现的所有方法步骤，且能够达到相同的技术效果，在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
请参考图20，本申请实施例还提供一种第一网元2000，包括处理器2001，存储器2002，存储在存储器2002上并可在所述处理器2001上运行的计算机程序，该计算机程序被处理器2001执行时实现上述由图1或图4所示的用户平面功能的选择方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
请参考图21，本申请实施例还提供一种UPF或第二网元2100，包括处理器2101，存储器2102，存储在存储器2102上并可在所述处理器2101上运行的计算机程序，该计算机程序被处理器2101执行时实现上述由图2或图5所示的用户平面功能的选择方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质上存储计算机程序，所述计算机程序被处理器执行时实现上述用户平面功能的选择方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，所述的计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
需要说明的是，在本文中，术语“包括”、“中包含”或者其任何其他变体意在涵盖非排他性的中包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实 施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (31)

  1. 一种用户平面功能UPF的选择方法，包括：
    第一网元接收第一UPF发送的用于指示为第一业务重选UPF的第一消息；
    所述第一网元根据所述第一业务的第一信息和/或至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。
  2. 如权利要求1所述的方法，其中，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
  3. 如权利要求2所述的方法，其中，还包括：
    所述第一网元返回所述第一业务的UPF重选结果。
  4. 如权利要求3所述的方法，其中，所述第一网元返回所述第一业务的UPF重选结果，包括：
    所述第一网元向第一终端发送用于指示第二UPF的第二消息，所述第一终端为发起所述第一业务的终端。
  5. 如权利要求2所述的方法，其中，还包括：
    所述第一网元向所述第二UPF发送所述第一业务的第一信息。
  6. 如权利要求1所述的方法，其中，还包括：
    所述第一网元接收至少一个UPF发送的算力信息，所述算力信息包括以下信息中的至少一种：算力标识、服务标识、算力位置信息、服务位置信息、算力实时信息、服务实时信息。
  7. 如权利要求1所述的方法，其中，在接收所述第一消息之前，所述方法还包括：
    第一网元接收第一终端发送的针对第一业务的会话建立请求；
    第一网元选择与所述第一终端距离最近的第一UPF，向所述第一终端发送用于指示所述第一UPF的第三消息，以使所述第一终端向第一UPF发起第一业务的会话建立过程。
  8. 一种用户平面功能的选择方法，包括：
    目标UPF接收第一业务的第一信息；
    所述目标UPF根据算力信息和/或所述第一业务的第一信息，在不存在满 足所述第一业务的本地节点的情况下，向第一网元发送用于指示为第一业务重选UPF的第一消息。
  9. 如权利要求8所述的方法，其中，所述第一消息携带有以下信息中的至少一种：发起所述第一业务的第一终端信息；所述第一业务的业务标识；所述第一业务的第一信息；所述第一业务的需求信息。
  10. 如权利要求8所述的方法，其中，还包括：
    所述目标UPF在存在满足所述第一业务的本地节点的情况下，从满足所述第一业务的本地节点中选择出第一目标节点；
    所述目标UPF向所述第一目标节点发送针对第一终端的第一业务的会话建立请求。
  11. 如权利要求8所述的方法，其中，所述目标UPF接收第一业务的第一信息，包括以下至少一种：
    所述目标UPF接收第一终端在建立所述第一业务的会话过程中发送的第一业务的第一信息；
    在所述第一网元重新选择了所述目标UPF为所述第一业务的服务的情况下，所述目标UPF接收所述第一网元发送的第一业务的第一信息。
  12. 如权利要求8所述的方法，其中，还包括：
    所述目标UPF接收本地节点发送的算力信息；
    所述目标UPF将本地节点的算力信息发送给第一网元。
  13. 一种用户面功能的选择方法，包括：
    第一网元接收至少一个节点的节点信息；
    根据所述至少一个节点的节点信息，选择出第一目标节点，并将所述第一目标节点连接的第一UPF作为为第一终端服务的UPF。
  14. 如权利要求13所述的方法，其中，还包括：
    向所述第一UPF发送针对所述第一终端的第一业务的第一会话建立请求，所述第一会话建立请求中携带有所述第一目标节点的指示信息。
  15. 如权利要求13所述的方法，其中，所述第一网元接收至少一个节点的节点信息，包括：
    所述第一网元接收第一终端的第一业务的第二会话建立请求，获取所述第 一业务的第一信息；
    所述第一网元向第二网元发送第一分析请求，所述第一分析请求携带有所述第一业务的第一信息，以及，接收所述第二网元根据所述第一业务的第一信息、网络信息和算力信息中的至少一个计算得到至少一个节点的节点信息。
  16. 如权利要求15所述的方法，其中，获取所述第一业务的第一信息，包括以下至少一种：
    获取统一数据存储库UDR中记录的第一业务的第一信息，其中，所述UDR记录的第一业务的第一信息来自于应用功能AF；
    从所述第二会话建立请求中解析得到第一业务的第一信息。
  17. 如权利要求13所述的方法，其中，
    所述节点信息用于指示节点的综合性能；
    所述根据所述至少一个节点的节点信息，选择出第一目标节点，包括：
    根据所述至少一个节点的节点信息，生成一个DNAI列表，所述DNAI列表包括有各个节点、节点的数据网络接入标识DNAI、UPF以及对应的节点信息；
    从所述DNAI列表选择出第一目标节点、所述第一目标节点相关的第一DNAI和第一UPF。
  18. 如权利要求13所述的方法，其中，还包括：
    所述第一网元发送用于指示重选UPF和节点的第一请求；
    所述第一网元接收结合所述第一终端的当前位置重新计算得到的至少一个节点的节点信息；
    所述第一网元根据重新计算得到的至少一个节点的节点信息，重新选择出第二UPF和第二目标节点。
  19. 如权利要求18所述的方法，其中，还包括：
    所述第一网元发送用于释放第一会话的会话释放请求，所述会话释放请求携带有所述第二目标节点所属的第二DNAI的指示信息，以指示选择所述第二DNAI对应的第一网元以重建第一业务的第二会话。
  20. 一种用户面功能的选择方法，包括：
    第二网元接收第一分析请求，所述第一分析请求携带有第一终端的第一业 务的第一信息；
    所述第二网元根据第一业务的第一信息、网络信息和节点的算力信息中的至少一个，计算得到至少一个节点的节点信息；
    所述第二网元返回所述至少一个节点的节点信息，以用于选择为所述第一终端服务的UPF和目标节点。
  21. 如权利要求20所述的方法，其中，在计算所述至少一个节点的节点信息之前，还包括：
    所述第二网元向AF订阅节点的算力信息，接收AF发送的节点的算力信息；或者，
    所述第二网元从核心网网管处获取节点的算力信息。
  22. 如权利要求20所述的方法，其中，在计算所述至少一个节点的信息之前，还包括：
    所述第二网元向指定网络功能订阅网络数据，接收相关网络功能发送的网络信息。
  23. 一种第一网元，包括收发机和处理器，其中，
    所述收发机，用于接收第一UPF发送的用于指示为第一业务重选UPF的第一消息；
    所述处理器，用于根据所述第一业务的第一信息和/或至少一个UPF发送的算力信息，重新选择为所述第一业务服务的第二UPF。
  24. 一种第一网元，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求1至7任一项所述的方法的步骤。
  25. 一种UPF，包括收发机和处理器，其中，
    所述收发机，用于接收第一业务的第一信息；
    所述处理器，用于根据算力信息和所述第一业务的第一信息，在不存在满足所述第一业务的本地节点的情况下，向第一网元发送用于指示为第一业务重选UPF的第一消息。
  26. 一种UPF，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求8至12 任一项所述的方法的步骤。
  27. 一种第一网元，包括收发机和处理器，其中，
    所述收发机，用于接收至少一个节点的节点信息；
    所述处理器，用于根据所述至少一个节点的节点信息，选择出第一目标节点，并将所述第一目标节点连接的第一UPF作为为第一终端服务的UPF。
  28. 一种第一网元，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求13至19任一项所述的方法的步骤。
  29. 一种第二网元，包括收发机和处理器，其中，
    所述收发机，用于接收第一分析请求，所述第一分析请求携带有第一终端的第一业务的第一信息；
    所述处理器，用于根据第一业务的第一信息、网络信息和节点的算力信息中的至少一个，计算得到至少一个节点的节点信息；所述第二网元返回所述至少一个节点的节点信息，以用于选择为所述第一终端服务的UPF和目标节点。
  30. 一种第二网元，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的程序，所述程序被所述处理器执行时实现如权利要求20至22任一项所述的方法的步骤。
  31. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至22任一项所述的方法的步骤。
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