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WO2021083033A1 - 一种中间会话管理功能i-smf确定方法和设备 - Google Patents

一种中间会话管理功能i-smf确定方法和设备 Download PDF

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Publication number
WO2021083033A1
WO2021083033A1 PCT/CN2020/122958 CN2020122958W WO2021083033A1 WO 2021083033 A1 WO2021083033 A1 WO 2021083033A1 CN 2020122958 W CN2020122958 W CN 2020122958W WO 2021083033 A1 WO2021083033 A1 WO 2021083033A1
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WIPO (PCT)
Prior art keywords
smf
mec
mec application
information
type
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PCT/CN2020/122958
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English (en)
French (fr)
Inventor
陶源
侯云静
王胡成
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大唐移动通信设备有限公司
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Publication of WO2021083033A1 publication Critical patent/WO2021083033A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Definitions

  • This application relates to the field of communication technology, and in particular to a method and device for determining an intermediate session management function I-SMF.
  • Mobile Edge Computing (MEC) technology by migrating computing storage capabilities and business service capabilities to the edge of the network, avoids sending data back to the cloud as much as possible, reducing the waiting time for data to and from the cloud and network costs.
  • 5G user planes and 5G MEC nodes are built at the edge of cloudification.
  • 5G MEC nodes provide MEC application platforms to realize the deployment and management capabilities of third-party applications. Users can get services through the MEC application.
  • a suitable intermediate session management (Intermediate SMF, I-SMF) needs to be selected to support MEC and UE Transfer data between.
  • the existing technical solution is determined by the Access and Mobility Management Function (AMF) based on the UE location, SMF and I-SMF service area information Whether to insert, change or delete the I-SMF, but the existing solution due to the UE movement, SMF cannot control the User Plan Function (UPF), which affects the session between UE and MEC and cannot be implemented as MEC choose the appropriate I-SMF.
  • AMF Access and Mobility Management Function
  • UPF User Plan Function
  • This application provides a method and device for determining an intermediate session management function I-SMF to solve the problem that the session between the user equipment UE and the MEC is affected due to the session management function SMF being unable to control the user plane function module UPF, which is implemented as MEC selects the appropriate I-SMF.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the application function (Application Function, AF) side, and the method includes:
  • the request information contains mobile edge computing MEC application information.
  • the request information is used to instruct access and mobility management AMF or session management function SMF to select I-SMF based on MEC application information when selecting I-SMF;
  • NEF Network Exposure Function
  • PCF Policy Control Function
  • the mobile edge computing MEC application information created by the AF instructs the AMF or SMF to select the I-SMF based on the MEC application information, so that the AMF or SMF selects the appropriate I-SMF based on the MEC application information to ensure that the UE Continuity of sessions and services with MEC.
  • the MEC application information includes one or more of the following: Data Network Access Identifier (DNAI) corresponding to MEC, MEC server address, MEC application server address, MEC application attributes information;
  • DNAI Data Network Access Identifier
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the PCF side of the policy control function, and the method includes:
  • the request information contains the mobile edge computing MEC application information.
  • the request information is used to indicate the access and mobility management AMF or the session management function SMF.
  • I-SMF select I based on the MEC application information -SMF;
  • PCC Policy Control Charging
  • the PCF generates PCC rules containing MEC application information according to the request information sent by the acquired AF, so that SMF can obtain MEC application information from the PCC rules.
  • the AMF or SMF selects the appropriate I-SMF, it can be based on the MEC.
  • Application information is selected to ensure the continuity of the session and service between the UE and the MEC.
  • the MEC application information includes one or more of the following: data network access identifier DNAI corresponding to the MEC, MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the session management function SMF side, and the method includes:
  • the PCC rules contain mobile edge computing MEC application information
  • I-SMF selection indication information is generated, and the I-SMF selection indication information is sent to Access and Mobility Management function AMF, I-SMF selection indication information is used to instruct AMF to determine I-SMF based on the first type of MEC application information when selecting I-SMF;
  • the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information contained in the PCC rule, or when the second type of MEC application is included
  • the second type of MEC application information is extracted from the PCC rules of the information, and the second type of MEC application information is forwarded to the access and mobility management function AMF.
  • the SMF determines the MEC application information in the received PCC rules.
  • the MEC application information is the first type of MEC application information
  • the I-SMF selection indication information is generated, so that the AMF selects the I-SMF based on the I-SMF selection indication information.
  • the MEC application information of the first type can be selected to ensure the continuity of the session and service between the UE and the MEC.
  • the MEC application information is the second type of MEC application information
  • the SMF can select the I-SMF based on the second type of MEC application information.
  • the MEC-like application information determines the I-SMF to ensure the continuity of the session and service between the UE and the MEC.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the access and mobility management function AMF side, and the method includes:
  • I-SMF selection indication information sent by the session management function SMF, where the I-SMF selection indication information contains the MEC application information of the first type;
  • the I-SMF is determined when the I-SMF is selected according to the MEC application information of the first type.
  • the AMF is based on the MEC application information of the first type in the received I-SMF selection indication information.
  • it selects the I-SMF according to the MEC application information of the first type to ensure that the session and the MEC between the UE and the MEC are selected. Continuity of service.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the method further includes:
  • the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information.
  • AMF is based on the second type of MEC application information in the received PCC rules, and when selecting I-SMF, it selects I-SMF according to the second type of MEC application information to ensure the continuity of the session and service between the UE and the MEC .
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the application function AF side, and the device includes: a processor and a memory;
  • the processor is used to read the program in the memory and execute the following process:
  • the request information contains mobile edge computing MEC application information.
  • the request information is used to instruct access and mobility management AMF or session management function SMF to select I-SMF based on MEC application information when selecting I-SMF;
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and the MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the PCF side of the policy control function, and the device includes: a processor and a memory;
  • the processor is used to read the program in the memory and execute the following process:
  • the request information contains the mobile edge computing MEC application information.
  • the request information is used to indicate the access and mobility management AMF or the session management function SMF.
  • I-SMF select I based on the MEC application information -SMF;
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and the MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the session management function SMF side, and the device includes: a processor and a memory;
  • the processor is used to read the program in the memory and execute the following process:
  • the PCC rules contain mobile edge computing MEC application information
  • I-SMF selection indication information is generated, and the I-SMF selection indication information is sent to Access and Mobility Management function AMF, I-SMF selection indication information is used to instruct AMF to determine I-SMF based on the first type of MEC application information when selecting I-SMF;
  • the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information contained in the PCC rule, or when the second type of MEC application is included
  • the second type of MEC application information is extracted from the PCC rules of the information, and the second type of MEC application information is forwarded to the access and mobility management function AMF.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the access and mobility management function AMF side, and the device includes: a processor and a memory;
  • the processor is used to read the program in the memory and execute the following process:
  • I-SMF selection indication information sent by the session management function SMF, where the I-SMF selection indication information contains the MEC application information of the first type;
  • the I-SMF is determined when the I-SMF is selected according to the MEC application information of the first type.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the processor is also used to:
  • the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the application function AF side.
  • the device includes a processing module and a sending module, wherein:
  • the processing module is used to create request information.
  • the request information contains mobile edge computing MEC application information.
  • the request information is used to indicate access and mobility management AMF or session management function SMF.
  • I-SMF select I based on MEC application information -SMF;
  • the sending module is used to send request information to the network opening function NEF or the policy control function PCF.
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and the MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the PCF side of the policy control function.
  • the device includes an acquisition module, a processing module, and a sending module, wherein:
  • the acquisition module is used to acquire the request information sent by the application function AF.
  • the request information contains the mobile edge computing MEC application information.
  • the request information is used to indicate the access and mobility management AMF or the session management function SMF when the I-SMF is selected based on MEC application information select I-SMF;
  • the processing module is used to generate policy control and charging PCC rules containing MEC application information according to the request information;
  • the sending module is used to send the PCC rules to the session management function SMF.
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and the MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the session management function SMF side.
  • the device includes a receiving module, a first processing module, and a second processing module, wherein:
  • the receiving module is used to receive the PCC rules sent by the policy control function PCF, and the PCC rules include mobile edge computing MEC application information;
  • the first processing module is used to generate I-SMF selection indication information based on the first type of MEC application information when it is determined that the MEC application information contained in the PCC rule is the first type of MEC application information, and to set the I-SMF selection indication information Sent to the access and mobility management function AMF, the I-SMF selection indication information is used to instruct the AMF to determine the I-SMF based on the first type of MEC application information when selecting the I-SMF;
  • the second processing module is used to determine the I-SMF when the I-SMF is selected according to the second type of MEC application information contained in the PCC rule when it is determined that the MEC application information contained in the PCC rule is the second type of MEC application information, or Extract the second type of MEC application information from the PCC rules containing the second type of MEC application information, and forward the second type of MEC application information to the access and mobility management function AMF.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the access and mobility management function AMF side.
  • the device includes a first receiving module and a first determining module, wherein:
  • the first receiving module is configured to receive the I-SMF selection indication information sent by the session management function SMF, and the I-SMF selection indication information includes the MEC application information of the first type;
  • the first determining module is configured to determine the I-SMF when selecting the I-SMF according to the MEC application information of the first type.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the device further includes:
  • the second receiving module is configured to receive the second type of MEC application information sent by the SMF;
  • the second determining module is used to determine the I-SMF when selecting the I-SMF according to the second type of MEC application information.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • the present application also provides a computer storage medium on which a computer program is stored, and when the program is executed by a processing unit, the steps of the method of the first aspect, the second aspect, the third aspect, or the fourth aspect are realized.
  • Figure 1 is a schematic structural diagram of an edge computing network architecture in the prior art
  • FIG. 2 is a schematic flowchart of a method for determining an intermediate session management function I-SMF provided by an embodiment of the application;
  • FIG. 3 is a schematic flowchart of another method for determining an intermediate session management function I-SMF provided by an embodiment of the application;
  • FIG. 4 is a schematic flowchart of yet another method for determining an intermediate session management function I-SMF provided by an embodiment of the application;
  • FIG. 5 is a schematic flowchart of a method for determining an intermediate session management function I-SMF applied to the AF side according to an embodiment of the application;
  • FIG. 6 is a schematic flowchart of a method for determining an intermediate session management function I-SMF applied to the PCF side according to an embodiment of the application;
  • FIG. 7 is a schematic flowchart of a method for determining an intermediate session management function I-SMF applied to the SMF side according to an embodiment of the application;
  • FIG. 8 is a schematic flowchart of a method for determining an intermediate session management function I-SMF applied to the AMF side according to an embodiment of the application;
  • FIG. 9 is a schematic structural diagram of an I-SMF determining device for an intermediate session management function on the AF side provided by an embodiment of the application;
  • FIG. 10 is a schematic structural diagram of an I-SMF determination device for an intermediate session management function on the PCF side provided by an embodiment of the application;
  • FIG. 11 is a schematic structural diagram of an I-SMF determining device for an intermediate session management function on the SMF side according to an embodiment of the application;
  • FIG. 12 is a schematic structural diagram of an I-SMF determining device for an intermediate session management function on the AMF side according to an embodiment of the application;
  • FIG. 13 is a schematic structural diagram of an I-SMF determining device for an intermediate session management function on the AF side provided by an embodiment of the application;
  • FIG. 14 is a schematic structural diagram of a device for determining an intermediate session management function I-SMF on the PCF side according to an embodiment of the application;
  • Fig. 15 is a schematic structural diagram of an I-SMF determining device for an intermediate session management function on the SMF side provided by an embodiment of the application;
  • FIG. 16 is a schematic structural diagram of an I-SMF determining device for an intermediate session management function on the AMF side provided by an embodiment of the application.
  • MEC technology migrates computing storage capabilities and business service capabilities to the edge of the network, avoiding the need to transmit data back to the cloud as much as possible, reducing the waiting time for data to and from the cloud and network costs.
  • 5G user planes and 5G MEC nodes are built at the edge of cloudification.
  • 5G MEC nodes provide MEC application platforms to realize the deployment and management capabilities of third-party applications. Users can get services through the MEC application.
  • 5G defines the application function AF, which sends an AF request (AF request) to non-trusted domains (for example, network prescribing function) or to trusted domains (for example, policy control function), which includes the target digital data network (Digital Data Network, DNN), application identification (Identification, ID), N6 routing requirements, application location and a series of parameters.
  • the policy control function PCF generates policy control and charging PCC rules for the target protocol data unit session (Protocol Data Unit Session, PDU Session) service flow according to these information parameters provided by the AF, combined with its own policy control, and selects one for it through SMF Appropriate UPF.
  • MEC provides functions such as application infrastructure resource orchestration, application instantiation, and application rule configuration. Therefore, when the MEC is deployed in the 5G system, the MEC can also act as an AF role, representing the interaction between the applications deployed on the MEC and the 5G system control plane.
  • the current edge computing network architecture is shown in Figure 1. Its main network functions are introduced as follows:
  • Access and mobility management function AMF 101 It has functions such as registration and connection management.
  • User plane function module UPF 102 It has an external PDU session node interconnected with the data network, and has the functions of message routing and forwarding.
  • Session management function SMF 103 It has functions such as session establishment and deletion, user plane selection and control, and UE IP allocation.
  • Application function AF 104 Interact with the 3GPP core network to provide service functions. Based on the deployment of operators, the trusted AF can directly interact with the relevant network function NF, while the untrusted AF cannot directly interact with the NF. Instead, the external disclosure framework should be used to conduct the network opening function NEF.
  • NEF Provides functions to safely expose the services and capabilities provided by the 3GPP network to external networks.
  • Policy control function PCF 105 It has a unified policy framework to manage network behaviors and provide policy rules for the control plane NF to execute.
  • NRF Network Storage Function
  • Unified Data Management (UDM) UDM 106 Store UE information, such as subscription information, and information about established PDU sessions.
  • UDR Unified Data Repository
  • I-SMF is an SMF that is inserted, changed, or deleted to the PDU session as needed to control UPF that the original SMF cannot control (because the UPF belongs to different SMF service areas).
  • SMF is a session management function, which is mainly used for session establishment and deletion, user plane selection and control, UE IP allocation, etc.
  • I-SMF has the same function as SMF.
  • the AMF is responsible for checking when to add or delete an I-SMF for a PDU session.
  • a mobility event for example, handover AMF changes
  • the AMF selects and inserts a service that can serve the UE and meets the network slice identification (Sign-Network Slice Selection Assistance Information, S -NSSAI) I-SMF.
  • S -NSSAI Network Slice Selection Assistance Information
  • AMF Conversely, if AMF detects an I-SMF that is no longer needed, AMF will delete the SMF interface between the I-SMF and the AMF directly connected to the PDU session. If the AMF detects that the SMF cannot provide services for the location of the UE (for example, due to the mobility of the UE), the AMF selects a new I-SMF to provide services for the UE. If the existing I-SMF cannot provide services for the location of the UE, the AMF will initiate the replacement of the I-SMF.
  • the current I-SMF selection mechanism defined by 5G is determined by the AMF based on the UE location, SMF and I-SMF service area, etc., to determine whether to insert, change or delete the I-SMF.
  • the SMF cannot control the UPF and the session between the UE and the MEC is affected.
  • the embodiment of the present application proposes an I-SMF selection method to select a suitable I-SMF according to the service (for example, for UEs that need to use the MEC service) to ensure the session and service continuity between the UE and the MEC.
  • an intermediate session management function I-SMF determination method provided in the embodiment of the application.
  • the AF sends a request containing the DNAI corresponding to the MEC Information AF request
  • PCF generates new PCC rules and updates to SMF based on AF request
  • SMF obtains DNAI in PCC rules and sends it to AMF
  • AMF selects I-SMF based on DNAI, which specifically includes the following steps:
  • Step 201 AF creates request information.
  • the request information contains MEC application information as DNAI, which is used to instruct the selection of I-SMF based on DNAI.
  • AF creates a request message by calling the Nnef_TrafficInfluence_Create service operation.
  • the message contains the data network access identifier DNAI corresponding to the MEC, which is also the DNAI corresponding to the DN where the MEC is deployed, and is used to indicate the selection of I-SMF based on the DNAI.
  • the request information may also include one or a group of UE IDs (for example, Generic Public Subscription Identifier (GPSI)).
  • GPSI Generic Public Subscription Identifier
  • Step 202 NEF receives the request information and stores it in the UDR.
  • AF sends request information to NEF, and NEF stores the AF request in UDR.
  • Step 203 UDR sends notification information to PCF.
  • the PCF subscribes to the UDR for changes in the AF request, when the AF request information changes, the UDR notifies the PCF by sending notification information, and the PCF can obtain the request information of the AF request from the notification information.
  • Step 204 The PCF generates a new PCC rule according to the request information.
  • the PCF can directly receive the request information sent by the AF, and generate new PCC rules based on the request information, that is, without performing steps 203 and 204, the AF directly sends the request information after generating the request information To PCF.
  • Step 205 The PCF sends a new PCC rule to the SMF, and the PCC rule contains MEC application information.
  • the PCF can send the new PCC rule to the SMF by calling Npcf_SMPolicyControl_UpdateNotify.
  • Step 206 SMF extracts MEC application information from PCC rules, and generates I-SMF selection instruction information.
  • SMF after SMF receives the new PCC rule, it extracts DNAI information from the PCC rule and generates I-SMF selection instruction information, where the I-SMF selection instruction information contains DNAI information.
  • Step 207 The SMF sends I-SMF selection indication information with MEC application information to the AMF.
  • Step 208 The AMF selects an I-SMF according to the I-SMF selection instruction information.
  • the I-SMF selection instruction information received by AMF contains DNAI information, and AMF selects I-SMF based on DNAI information. For example, AMF selects I-SMF based on whether I-SMF supports DNAI, and whether I-SMF supports DNAI. Information can be obtained from NRF.
  • an intermediate session management function I-SMF determination method provided in the embodiment of the application.
  • the AF sent contains the MEC server address/MEC application AF request of server address
  • PCF generates new PCC rules based on AF request and updates to SMF
  • SMF selects I-SMF based on PCC rules
  • SMF obtains MEC server address/MEC application server address from PCC rules and sends it to AMF, which is based on MEC
  • the server address/MEC application server address selection I-SMF includes the following steps:
  • Step 301 AF creation request information
  • the request information includes the MEC server address/MEC application server address, which is used to instruct the selection of I-SMF based on the MEC server address/MEC application server address.
  • AF creates a request message by calling the Nnef_TrafficInfluence_Create service operation.
  • the message contains the MEC server address/MEC application server address, which is used to indicate that based on the MEC server address/MEC application server address, select I-SMF, and the request information contains One or a group of UE IDs (for example, GPSI).
  • Step 302 NEF receives the request information and stores it in the UDR.
  • AF sends request information to NEF, and NEF stores the AF request in UDR.
  • Step 303 The UDR sends notification information to the PCF.
  • the PCF subscribes to the UDR for changes in the AF request, when the AF request information changes, the UDR notifies the PCF by sending notification information, and the PCF can obtain the request information of the AF request from the notification information.
  • Step 304 The PCF generates a new PCC rule according to the request information, and the PCC rule includes the MEC server address/MEC application server address.
  • the PCF can directly receive the request information sent by the AF, and generate new PCC rules based on the request information, that is, without performing steps 303 and 304, the AF directly sends the request information after generating the request information To PCF.
  • Step 305 The PCF sends a new PCC rule to the SMF, and the PCC rule includes the MEC server address/MEC application server address.
  • PCF sends PCC rules to SMF by calling Npcf_SMPolicyControl_UpdateNotify.
  • Step 306 The SMF obtains the MEC server address/MEC application server address in the new PCC rule, and sends it to the AMF.
  • step 307 the AMF selects the I-SMF according to the MEC server address/MEC application server address.
  • AMF selects the appropriate I-SMF according to the MEC server address/MEC application server address sent by the received SMF. For example, the service area of the I-SMF can cover the access to the MEC, and whether the I-SMF can access the MEC through the corresponding UPF .
  • the SMF selects the I-SMF according to the PCC rules.
  • an intermediate session management function I-SMF determination method provided in the embodiment of the present application.
  • the AF sends the AF containing the MEC application attribute information.
  • Request, MEC application attribute information includes the distribution of applications and application instances, service capabilities, load, life cycle, and the corresponding MEC server address/MEC application server address, etc.
  • PCF generates new PCC rules and updates to SMF based on AF request.
  • SMF selects I-SMF based on PCC rules, or SMF obtains MEC application attribute information from PCC rules and sends it to AMF, and AMF selects I-SMF based on MEC application attribute information, which specifically includes the following steps:
  • Step 401 AF creation request information, the request information contains MEC application information as MEC application attribute information, which is used to instruct the selection of I-SMF based on the MEC application attribute information.
  • AF creates a request message by calling the Nnef_TrafficInfluence_Create service operation.
  • the message contains MEC application attribute information (including the distribution of applications and application instances, service capabilities, service types, loads, and life cycles, which are used to select I-SMF , Traffic routing, traffic guidance, etc.), used to indicate the selection of I-SMF based on MEC application attribute information, and the request information includes one or a group of UE IDs (for example, GPSI).
  • Step 402 NEF receives the request information and stores it in the UDR.
  • AF sends request information to NEF, and NEF stores the AF request in UDR.
  • Step 403 UDR sends notification information to PCF.
  • the PCF subscribes to the UDR for changes in the AF request, when the AF request information changes, the UDR notifies the PCF by sending notification information, and the PCF can obtain the request information of the AF request from the notification information.
  • step 404 the PCF generates a new PCC rule according to the request information.
  • the PCF can directly receive the request information sent by the AF, and generate a new PCC rule based on the request information, that is, without performing steps 403 and 404, the AF sends the request information directly after generating the request information To PCF.
  • the PCF can directly receive the request information sent by the AF, and generate a new PCC rule based on the request information, that is, it is not necessary to perform steps 502 and 503. After the AF generates the request information, it directly sends the request information To PCF.
  • Step 405 The PCF sends a new PCC rule to the SMF, and the PCC rule contains MEC application attribute information.
  • PCF sends PCC rules to SMF by calling Npcf_SMPolicyControl_UpdateNotify.
  • Step 406 The SMF obtains the MEC application attribute information from the new PCC rule and sends it to the AMF.
  • step 407 the AMF selects the I-SMF according to the MEC application attribute information.
  • the AMF selects an appropriate I-SMF according to the MEC application attribute information sent by the received SMF, for example, the I-SMF is selected based on the service type, location, and service area of the I-SMF of the MEC application, whether it can access the MEC, etc.
  • steps 406 and 407 may not be required, and the SMF selects the I-SMF according to the PCC rules.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the AF side and includes the following steps:
  • Step 501 Create request information.
  • the request information contains mobile edge computing MEC application information.
  • the request information is used to indicate access and mobility management AMF or session management function SMF.
  • I-SMF is selected, the I-SMF is selected based on the MEC application information. .
  • AF can create a request information AF request by calling the Nnef_TrafficInfluence_Create service operation.
  • the request information contains MEC application information.
  • the MEC application information can be one of the DNAI corresponding to the MEC, the MEC server address, and the MEC application attribute information.
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles, that is, information related to MEC application information.
  • the MEC application information in the request information is MEC application attribute information, it can provide information for I-SMF selection, traffic routing, and traffic guidance.
  • the request information generated by AMF is used to instruct AMF or SMF to select I-SMF based on MEC application information when selecting I-SMF, so as to select a suitable I-SMF for the MEC to ensure the session between the UE and the MEC. Service continuity, especially when the UE is moving.
  • the request information created by the AF may also include a UE ID or a group of UE IDs (for example, GPSI).
  • Step 502 Send the request information to the network opening function NEF or the policy control function PCF.
  • the AF sends the generated request information to the NEF, so that the NEF stores the request information in the UDR, and the PCF can obtain the request information from the notification information by subscribing to the UDR for the change of the request information.
  • the AF sends the generated request information directly to the PCF.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the PCF side and includes the following steps:
  • Step 601 Obtain request information sent by the application function AF.
  • the request information includes mobile edge computing MEC application information.
  • the request information is used to indicate the access and mobility management AMF or the session management function SMF when the I-SMF is selected, based on the MEC application Information choose I-SMF.
  • the PCF directly obtains the request information sent by the AF to the PCF, and the PCF subscribes to the UDR for the request information sent by the AF to the NEF.
  • the PCF obtains the request information sent by the AF through the notification information.
  • the request information obtained by the PCF includes MEC application information.
  • the MEC application information can be one or more of DNAI, MEC server address, and MEC application attribute information.
  • the MEC application attribute information includes the distribution of MEC applications and MEC application instances. , Service capability, service type, load, life cycle, that is, MEC business related information.
  • Step 602 According to the request information, generate policy control and charging PCC rules containing MEC application information.
  • the PCF generates a new PCC rule according to the request information sent by the AF, and the new PCC rule contains the MEC application information.
  • Step 603 Send the PCC rule to the session management function SMF.
  • PCF sends the generated PCC rules to SMF by calling Npcf_SMPolicyControl_UpdateNotify, that is, to update SMF with new rules.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the SMF side and includes the following steps:
  • Step 701 Receive a PCC rule sent by a policy control function PCF, where the PCC rule contains mobile edge computing MEC application information.
  • SMF receives the PCC rules sent by PCF, updates the PCC rules in SMF, the received PCC rules contain MEC application information, the first type of MEC application information can be the DNAI corresponding to the MEC, and the second type of MEC application information can be One or more of MEC server address, MEC application server address, and MEC application attribute information, where the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • Step 702 When it is determined that the MEC application information contained in the PCC rule is the first type of MEC application information, generate I-SMF selection indication information based on the first type of MEC application information, and send the I-SMF selection indication information to the access With the mobility management function AMF, the I-SMF selection indication information is used to instruct the AMF to determine the I-SMF based on the first type of MEC application information when selecting the I-SMF.
  • the DNAI information can be extracted from the PCC rule to generate I-SMF selection instruction information, And send it to AMF to instruct AMF to select the appropriate I-SMF according to the first type of MEC application information, that is, DNAI when re-determining the I-SMF.
  • Step 703 When it is determined that the MEC application information contained in the PCC rule is the second type of MEC application information, the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information contained in the PCC rule, or when the second type of MEC application information is included
  • the second-type MEC application information is extracted from the PCC rules of the MEC-like application information, and the second-type MEC application information is forwarded to the access and mobility management function AMF.
  • the SMF determines that the MEC application information contained in the received PCC rule is the second type of MEC application information, that is, one or more of the MEC server address, the MEC application server address, and the MEC application attribute information, where the MEC Application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • SMF can directly determine the I-SMF based on the second type of MEC application information when selecting the I-SMF, or extract the second type of MEC application information from the PCC rules, and combine the second type of MEC application information.
  • the MEC-like application information is sent to the AMF.
  • an intermediate session management function I-SMF determination method provided by an embodiment of the present application is applied to the AMF side and includes the following steps:
  • Step 801 Receive I-SMF selection indication information sent by the session management function SMF, where the I-SMF selection indication information includes the first type of MEC application information.
  • the AMF receives the I-SMF selection indication information sent by the SMF, which is used to instruct the AMF to select a suitable I-SMF according to the first type of MEC application information (for example, DNAI) contained in the indication information.
  • the first type of MEC application information for example, DNAI
  • Step 802 Determine the I-SMF when selecting the I-SMF according to the MEC application information of the first type.
  • AMF when AMF selects I-SMF, it selects the appropriate I-SMF based on DNAI. For example, AMF selects I-SMF based on whether I-SMF supports DNAI. Information about whether I-SMF supports DNAI can be obtained from NRF. . AMF can also perform I-SMF insertion or change operation flow.
  • the AMF receives the MEC application information of the second type sent by the SMF;
  • the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information.
  • AMF selects the appropriate I-SMF according to the second type of MEC application information, for example, according to the service area of the I-SMF can cover access to the MEC and whether it can pass the corresponding UPF accesses MEC, etc. to determine I-SMF.
  • the MEC application attribute information includes: the distribution of applications and application instances, service capabilities, service types, loads, and life cycles One or more of them, the AMF selects the appropriate I-SMF according to the second type of MEC application information in the PCC rules, for example, based on the service type and location of the MEC application, the service area of the I-SMF, and whether the MEC can be accessed Wait to determine the I-SMF.
  • MEC application attribute information can be used for I-SMF selection, and can also be used to provide information for traffic routing, traffic guidance and other links.
  • a UE ID or a group of UE IDs may also be used for determination.
  • the embodiment of the present application also provides an intermediate session management function I-SMF determination device, because the device is the device in the method in the embodiment of the present application, and the principle of the device to solve the problem is the same as that of the method. Similar, so the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the application function AF side and includes a processor 900, a memory 901, and a transceiver 902.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 can store data used by the processor 900 when performing operations.
  • the transceiver 902 is used to receive and transmit data under the control of the processor 900.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 900 and various circuits of the memory represented by the memory 901 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 can store data used by the processor 900 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 900 or implemented by the processor 900.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 900 or instructions in the form of software.
  • the processor 900 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 901, and the processor 900 reads the information in the memory 901, and completes the steps of the signal processing flow in combination with its hardware.
  • processor 900 is configured to read the program in the memory 901 and execute the following process:
  • the request information contains mobile edge computing MEC application information.
  • the request information is used to instruct access and mobility management AMF or session management function SMF to select I-SMF based on MEC application information when selecting I-SMF;
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the PCF side of the policy control function and includes a processor 1000, a memory 1001, and a transceiver 1002.
  • the processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1001 can store data used by the processor 1000 when performing operations.
  • the transceiver 1002 is used to receive and transmit data under the control of the processor 1000.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1000 and various circuits of the memory represented by the memory 1001 are linked together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1001 can store data used by the processor 1000 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 1000 or implemented by the processor 1000.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 1000 or instructions in the form of software.
  • the processor 1000 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 1001, and the processor 1000 reads the information in the memory 1001, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 1000 is configured to read a program in the memory 1001 and execute the following process:
  • the request information contains the mobile edge computing MEC application information.
  • the request information is used to indicate the access and mobility management AMF or the session management function SMF.
  • I-SMF select I based on the MEC application information -SMF;
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided in an embodiment of the present application is applied to the session management function SMF side and includes a processor 1100, a memory 1101, and a transceiver 1102.
  • the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 when performing operations.
  • the transceiver 1102 is used to receive and send data under the control of the processor 1100.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1100 and various circuits of the memory represented by the memory 1101 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 1100 or implemented by the processor 1100.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 1100 or instructions in the form of software.
  • the processor 1100 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or execute the The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 1101, and the processor 1100 reads the information in the memory 1101 and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 1100 is configured to read a program in the memory 1101 and execute the following process:
  • the PCC rules contain mobile edge computing MEC application information
  • I-SMF selection indication information is generated, and the I-SMF selection indication information is sent to Access and Mobility Management function AMF, I-SMF selection indication information is used to instruct AMF to determine I-SMF based on the first type of MEC application information when selecting I-SMF;
  • the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information contained in the PCC rule, or when the second type of MEC application is included
  • the second type of MEC application information is extracted from the PCC rules of the information, and the second type of MEC application information is forwarded to the access and mobility management function AMF.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the session management function AMF side and includes a processor 1200, a memory 1201, and a transceiver 1202.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1201 can store data used by the processor 1200 when performing operations.
  • the transceiver 1202 is used to receive and transmit data under the control of the processor 1200.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1200 and various circuits of the memory represented by the memory 1201 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein.
  • the bus interface provides the interface.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1201 can store data used by the processor 1200 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 1200 or implemented by the processor 1200.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 1200 or instructions in the form of software.
  • the processor 1200 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or execute the The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 1201, and the processor 1200 reads the information in the memory 1201, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 1200 is configured to read a program in the memory 1201 and execute the following process:
  • I-SMF selection indication information sent by the session management function SMF, where the I-SMF selection indication information contains the MEC application information of the first type;
  • the I-SMF is determined when the I-SMF is selected according to the MEC application information of the first type.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the processor is also used to:
  • the I-SMF is determined when the I-SMF is selected according to the second type of MEC application information.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device is also provided in the embodiment of the present application.
  • This device is the device in the method in the embodiment of the present application, and the principle of the device to solve the problem is the same as The method is similar, so the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the application function AF side.
  • the device includes a processing module 1301 and a sending module 1302, where:
  • the processing module 1301 is used to create request information.
  • the request information contains mobile edge computing MEC application information.
  • the request information is used to indicate access and mobility management AMF or session management function SMF.
  • I-SMF is selected, the selection is based on MEC application information I-SMF.
  • the sending module 1302 is used to send request information to the network opening function NEF or the policy control function PCF.
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the PCF side of the policy control function.
  • the device includes an acquisition module 1401, a processing module 1402, and a sending module 1403. Among them,
  • the obtaining module 1401 is used to obtain request information sent by the application function AF.
  • the request information includes mobile edge computing MEC application information.
  • the request information is used to indicate the access and mobility management AMF or the session management function SMF when the I-SMF is selected, Select I-SMF based on MEC application information;
  • the processing module 1402 is configured to generate policy control and charging PCC rules containing MEC application information according to the request information;
  • the sending module 1403 is used to send the PCC rules to the session management function SMF.
  • the MEC application information includes one or more of the following: the data network access identifier DNAI corresponding to the MEC, the MEC server address, the MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the session management function SMF side.
  • the device includes a receiving module 1501, a first processing module 1502, and a second processing module 1503. ,among them,
  • the receiving module 1501 is used to receive the PCC rules sent by the policy control function PCF, and the PCC rules include mobile edge computing MEC application information;
  • the first processing module 1502 is configured to, when it is determined that the MEC application information contained in the PCC rule is the first type of MEC application information, generate I-SMF selection indication information based on the first type of MEC application information, and indicate the I-SMF selection
  • the information is sent to the access and mobility management function AMF, and the I-SMF selection indication information is used to instruct AMF to determine the I-SMF based on the first type of MEC application information when selecting the I-SMF;
  • the second processing module 1503 is used to determine the I-SMF when the I-SMF is selected according to the second type of MEC application information contained in the PCC rule when it is determined that the MEC application information contained in the PCC rule is the second type of MEC application information, Or, extract the second-type MEC application information from the PCC rule containing the second-type MEC application information, and forward the second-type MEC application information to the access and mobility management function AMF.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • the MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • an intermediate session management function I-SMF determination device provided by an embodiment of the present application is applied to the access and mobility management function AMF side.
  • the device includes a first receiving module 1601 and a first determining module 1602 ,among them,
  • the first receiving module 1601 is configured to receive I-SMF selection indication information sent by the session management function SMF, and the I-SMF selection indication information includes the first type of MEC application information;
  • the first determining module 1602 is configured to determine the I-SMF when the I-SMF is selected according to the MEC application information of the first type.
  • the first type of MEC application information is the data network access identifier DNAI corresponding to the MEC.
  • the equipment also includes:
  • the second receiving module 1603 is configured to receive the second type of MEC application information sent by the SMF;
  • the second determining module 1604 is configured to determine the I-SMF when the I-SMF is selected according to the second type of MEC application information.
  • the second type of MEC application information includes one or more of the following: MEC server address, MEC application server address, and MEC application attribute information;
  • MEC application attribute information includes MEC applications, distribution of MEC application instances, service capabilities, service types, loads, and life cycles.
  • An embodiment of the present application also provides a computer-readable non-volatile storage medium, including program code.
  • program code runs on a computing terminal
  • the program code is used to enable the computing terminal to perform the above-mentioned intermediate session management function of the embodiment of the present application.
  • -SMF determines the steps of the method.
  • this application can also be implemented by hardware and/or software (including firmware, resident software, microcode, etc.).
  • this application may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium to be used or used by the instruction execution system. Used in conjunction with the instruction execution system.
  • a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transmit a program for use by an instruction execution system, apparatus, or device, or in combination with an instruction execution system, Device or equipment use.

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Abstract

本申请公开了一种中间会话管理功能I-SMF确定方法和设备，用以解决因会话管理功能不能控制用户面功能模块，导致的用户设备UE与MEC之间会话受到影响的问题。本申请方法应用于应用功能AF侧，包括：创建请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；向网络开放功能NEF或者策略控制功能PCF发送请求信息。由于本申请的中间会话管理功能I-SMF确定方法，创建请求信息指示AMF或SMF基于MEC应用信息选择I-SMF，实现为MEC选择合适的I-SMF，保证UE与MEC之间会话的连续性。

Description

一种中间会话管理功能I-SMF确定方法和设备
相关申请的交叉引用
本申请要求在2019年10月30日提交中国专利局、申请号为201911044845.X、申请名称为“一种中间会话管理功能I-SMF确定方法和设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，特别涉及一种中间会话管理功能I-SMF确定方法和设备。
背景技术
移动边缘计算(Mobile Edge Computing，MEC)技术，通过将计算存储能力与业务服务能力向网络边缘迁移，尽可能实现不用将数据回传到云端，减少数据往返云端的等待时间和网络成本。基于5G的分布式云基础设施，在边缘云化构建5G用户面和5G MEC节点，5G MEC节点提供MEC应用平台实现对第三方应用的部署和管理能力。用户可通过MEC应用获得服务。
用户终端(User Equipment，UE)使用MEC服务时，若会话管理功能(Session Management Function，SMF)无法满足传输需求，需要选择一个合适的中间会话管理(Intermediate SMF，I-SMF)，支持MEC与UE之间的传输数据。
在5G定义的I-SMF选择机制，现有技术的解决方案由接入与移动性管理功能(Access and Mobility Management Function，AMF)基于UE位置、SMF与I-SMF的服务区域信息为依据，决定是否插入、更改或删除I-SMF，但现有解决方案因UE移动的因素，SMF无法控制用户面功能模块(User Plan Function，UPF)，导致UE与MEC之间会话受到影响，不能实现为MEC选择合适的I-SMF。
发明内容
本申请提供一种中间会话管理功能I-SMF确定方法和设备，用以解决因会话管理功能SMF不能控制用户面功能模块UPF，导致的用户设备UE与MEC之间会话受到影响的问题，实现为MEC选择合适的I-SMF。
第一方面，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于应用功能(Application Function，AF)侧，该方法包括：
创建请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
向网络开放功能(Network Exposure Function，NEF)或者策略控制功能(Policy Control Function，PCF)发送请求信息。
上述方法，由AF创建的包含移动边缘计算MEC应用信息，指示AMF或SMF基于MEC应用信息选择I-SMF，使AMF或SMF在选择合适的I-SMF时，依据MEC应用信息进行选择，保证UE与MEC之间的会话和服务的连续性。
在一种可能的实现方式中，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符(Data Network Access Identifier，DNAI)、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期。
第二方面，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于策略控制功能PCF侧，该方法包括：
获取应用功能AF发送的请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
根据请求信息，生成包含MEC应用信息的策略控制和计费(Policy Control  Charging，PCC)规则；
将PCC规则发送至会话管理功能SMF。
上述方法，PCF根据获取的AF发送的请求信息，生成包含MEC应用信息的PCC规则，使SMF能够从PCC规则中获取MEC应用信息，在AMF或SMF在选择合适的I-SMF时，能够依据MEC应用信息进行选择，保证UE与MEC之间的会话和服务的连续性。
在一种可能的实现方式中，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第三方面，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于会话管理功能SMF侧，该方法包括：
接收策略控制功能PCF发送的PCC规则，PCC规则中包含移动边缘计算MEC应用信息；
在确定PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于第一类MEC应用信息，生成I-SMF选择指示信息，并将I-SMF选择指示信息发送至接入与移动性管理功能AMF，I-SMF选择指示信息用于指示AMF在选择I-SMF时基于第一类MEC应用信息确定I-SMF；
在确定PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定I-SMF，或者在包含第二类MEC应用信息的PCC规则中提取第二类MEC应用信息，将第二类MEC应用信息转发至接入与移动性管理功能AMF。
上述方法，SMF在接收的PCC规则中确定MEC应用信息，MEC应用信息为第一类MEC应用信息时，生成I-SMF选择指示信息，使AMF基于I-SMF选择指示信息，在选择I-SMF时，能够依据第一类MEC应用信息进行选择，保证UE与MEC之间的会话和服务的连续性，MEC应用信息为第二类MEC 应用信息时，SMF在选择I-SMF时能够根据第二类MEC应用信息确定I-SMF，保证UE与MEC之间的会话和服务的连续性。
在一种可能的实现方式中，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
在一种可能的实现方式中，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第四方面，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于接入与移动性管理功能AMF侧，该方法包括：
接收会话管理功能SMF发送的I-SMF选择指示信息，I-SMF选择指示信息中包含第一类MEC应用信息；
根据第一类MEC应用信息在选择I-SMF时确定I-SMF。
上述方法，AMF基于接收的I-SMF选择指示信息中的第一类MEC应用信息，在选择I-SMF时，根据第一类MEC应用信息选择I-SMF，保证UE与MEC之间的会话和服务的连续性。
在一种可能的实现方式中，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
在一种可能的实现方式中，方法还包括：
接收SMF发送的第二类MEC应用信息；
根据第二类MEC应用信息在选择I-SMF时确定I-SMF。
上述方法，AMF基于接收的PCC规则中的第二类MEC应用信息，在选择I-SMF时，根据第二类MEC应用信息选择I-SMF，保证UE与MEC之间的会话和服务的连续性。
在一种可能的实现方式中，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务 能力、服务类型、负载、以及生命周期。
第五方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于应用功能AF侧，该设备包括：处理器和存储器；
其中，处理器，用于读取存储器中的程序并执行下列过程：
创建请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
向网络开放功能NEF或者策略控制功能PCF发送请求信息。
一种可能的实施方式中，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期。
第六方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于策略控制功能PCF侧，该设备包括：处理器和存储器；
其中，处理器，用于读取存储器中的程序并执行下列过程：
获取应用功能AF发送的请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
根据请求信息，生成包含MEC应用信息的策略控制和计费PCC规则；
将PCC规则发送至会话管理功能SMF。
一种可能的实施方式中，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第七方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备， 应用于会话管理功能SMF侧，该设备包括：处理器和存储器；
其中，处理器，用于读取存储器中的程序并执行下列过程：
接收策略控制功能PCF发送的PCC规则，PCC规则中包含移动边缘计算MEC应用信息；
在确定PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于第一类MEC应用信息，生成I-SMF选择指示信息，并将I-SMF选择指示信息发送至接入与移动性管理功能AMF，I-SMF选择指示信息用于指示AMF在选择I-SMF时基于第一类MEC应用信息确定I-SMF；
在确定PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定I-SMF，或者在包含第二类MEC应用信息的PCC规则中提取第二类MEC应用信息，将第二类MEC应用信息转发至接入与移动性管理功能AMF。
一种可能的实施方式中，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
一种可能的实施方式中，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第八方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于接入与移动性管理功能AMF侧，该设备包括：处理器和存储器；
其中，处理器，用于读取存储器中的程序并执行下列过程：
接收会话管理功能SMF发送的I-SMF选择指示信息，I-SMF选择指示信息中包含第一类MEC应用信息；
根据第一类MEC应用信息在选择I-SMF时确定I-SMF。
一种可能的实施方式中，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
一种可能的实施方式中，处理器还用于：
接收SMF发送的第二类MEC应用信息；
根据第二类MEC应用信息在选择I-SMF时确定I-SMF。
一种可能的实施方式中，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第九方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于应用功能AF侧，该设备包括处理模块和发送模块，其中，
处理模块，用于创建请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
发送模块，用于向网络开放功能NEF或者策略控制功能PCF发送请求信息。
一种可能的实施方式中，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期。
第十方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于策略控制功能PCF侧，该设备包括获取模块，处理模块和发送模块，其中，
获取模块，用于获取应用功能AF发送的请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
处理模块，用于根据请求信息，生成包含MEC应用信息的策略控制和计费PCC规则；
发送模块，用于将PCC规则发送至会话管理功能SMF。
一种可能的实施方式中，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第十一方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于会话管理功能SMF侧，该设备包括接收模块，第一处理模块和第二处理模块，其中，
接收模块，用于接收策略控制功能PCF发送的PCC规则，PCC规则中包含移动边缘计算MEC应用信息；
第一处理模块，用于在确定PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于第一类MEC应用信息，生成I-SMF选择指示信息，并将I-SMF选择指示信息发送至接入与移动性管理功能AMF，I-SMF选择指示信息用于指示AMF在选择I-SMF时基于第一类MEC应用信息确定I-SMF；
第二处理模块，用于在确定PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定I-SMF，或者在包含第二类MEC应用信息的PCC规则中提取第二类MEC应用信息，将第二类MEC应用信息转发至接入与移动性管理功能AMF。
一种可能的实施方式中，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
一种可能的实施方式中，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第十二方面，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于接入与移动性管理功能AMF侧，该设备包括第一接收模块和第一确定模块，其中，
第一接收模块，用于接收会话管理功能SMF发送的I-SMF选择指示信息，I-SMF选择指示信息中包含第一类MEC应用信息；
第一确定模块，用于根据第一类MEC应用信息在选择I-SMF时确定I-SMF。
一种可能的实施方式中，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
一种可能的实施方式中，设备还包括：
第二接收模块，用于接收SMF发送的第二类MEC应用信息；
第二确定模块，用于根据第二类MEC应用信息在选择I-SMF时确定I-SMF。
一种可能的实施方式中，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
第十三方面，本申请还提供一种计算机存储介质，其上存储有计算机程序，该程序被处理单元执行时实现第一方面、第二方面、第三方面或第四方面方法的步骤。
另外，第五方面至第十二方面中任一种实现方式所带来的技术效果可参见第一方面、第二方面、第三方面、第四方面中不同实现方式所带来的技术效果，此处不再赘述。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中边缘计算网络架构的结构示意图；
图2为本申请实施例提供的一种中间会话管理功能I-SMF确定方法的示意流程图；
图3为本申请实施例提供的又一种中间会话管理功能I-SMF确定方法的示意流程图；
图4为本申请实施例提供的再一种中间会话管理功能I-SMF确定方法的示意流程图；
图5为本申请实施例提供的应用于AF侧的中间会话管理功能I-SMF确定方法的示意流程图；
图6为本申请实施例提供的应用于PCF侧的中间会话管理功能I-SMF确定方法的示意流程图；
图7为本申请实施例提供的应用于SMF侧的中间会话管理功能I-SMF确定方法的示意流程图；
图8为本申请实施例提供的应用于AMF侧的中间会话管理功能I-SMF确定方法的示意流程图；
图9为本申请实施例提供的AF侧的中间会话管理功能I-SMF确定设备的结构示意图；
图10为本申请实施例提供的PCF侧的中间会话管理功能I-SMF确定设备的结构示意图；
图11为本申请实施例提供的SMF侧的中间会话管理功能I-SMF确定设备的结构示意图；
图12为本申请实施例提供的AMF侧的中间会话管理功能I-SMF确定设备的结构示意图；
图13为本申请实施例提供的AF侧的中间会话管理功能I-SMF确定设备的结构示意图；
图14为本申请实施例提供的PCF侧的中间会话管理功能I-SMF确定设备的结构示意图；
图15为本申请实施例提供的SMF侧的中间会话管理功能I-SMF确定设 备的结构示意图；
图16为本申请实施例提供的AMF侧的中间会话管理功能I-SMF确定设备的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例仅仅是本申请一部份实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
本申请实施例描述的应用场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着新应用场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。其中，在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
MEC技术通过将计算存储能力与业务服务能力向网络边缘迁移，尽可能不用将数据回传到云端，减少数据往返云端的等待时间和网络成本。基于5G的分布式云基础设施，在边缘云化构建5G用户面和5G MEC节点，5G MEC节点提供MEC应用平台实现对第三方应用的部署和管理能力。用户可通过MEC应用获得服务。
5G定义了应用功能AF，它向非授信域(例如，网络开方功能)或者向授信域(例如，策略控制功能)发送AF请求(AF request)，其中包含目标数字数据网(Digital Data Network，DNN)、应用身份标识(Identification，ID)、N6路由需求、应用位置等一系列参数。策略控制功能PCF根据AF提供的这些信息参数，结合自身策略控制，为目标协议数据单元会话(Protocol Data Unit Session，PDU Session)业务流生成策略控制和计费PCC规则，并通过SMF为其选择一个合适的UPF。MEC提供应用基础设施资源编排、应用实例化、 应用规则配置等功能。因此，当MEC部署在5G系统中时，MEC也可以充当AF角色，代表部署在MEC上的应用与5G系统控制面交互。
目前的边缘计算网络架构，如图1所示，其主要网络功能介绍如下：
接入与移动性管理功能AMF 101：具有注册、连接管理等功能。
用户面功能模块UPF 102：具有与数据网络互连的外部PDU会话节点，报文路由和转发功能。
会话管理功能SMF 103：具有会话建立、删除，用户面选择与控制，UE IP分配等功能。
应用功能AF 104：具有与3GPP核心网交互以提供业务功能。基于运营商部署情况，可信AF可以与相关网络功能NF进行直接交互，而非可信AF不能直接与NF交互，而应使用对外公开框架通过网络开放功能NEF进行。
NEF：具有提供安全地将3GPP网络提供的业务和能力暴露给外部网络相关的功能。
策略控制功能PCF 105：具有支持统一的策略框架，以管理网络行为，提供策略规则，以便控制面NF执行。
网络存储功能(Network Repository Function，NRF)NRF：具有支持服务发现功能。
统一数据管理(Unified Data Management，UDM)UDM 106：存储UE的信息，例如签约信息，已建立PDU会话的信息。
5G系统架构允许UDM，PCF和NEF在统一数据库(Unified Data Repository，UDR)存储数据，其中，UDR具有签约数据的存储及UDM前端(Front end，FE)对签约数据的检索、策略信息的存储及PCF对策略信息的检索的功能。
I-SMF是一种根据需要插入、更改或删除到PDU会话的SMF，用以控制原始SMF无法控制的UPF(因UPF属于不同SMF服务区域)。SMF在5G构架中的位置如图1所示，SMF是会话管理功能，主要用于会话建立、删除，用户面选择与控制，UE IP分配等。I-SMF与SMF具有相同功能。
由AMF负责检查何时为一个PDU会话添加或删除一个I-SMF。当移动性事件发生时(如，切换AMF改变)，如果SMF的服务区域不包含UE的新位置，则AMF选择和插入一个能服务UE与满足网络切片标识(Sign-Network Slice Selection Assistance Information，S-NSSAI)的I-SMF。
相反地，如果AMF检测到一个不再需要的I-SMF，AMF将删除I-SMF与AMF直接连接到PDU会话间的SMF接口。如果AMF检测到SMF不能为UE所在位置提供服务(如，由于UE移动性)，则AMF选择一个新的I-SMF为UE提供服务。如果存在的I-SMF不能为UE所在位置提供服务，则AMF将发起对I-SMF的更换。
综上所述，目前5G定义的I-SMF选择机制，由AMF基于UE位置、SMF与I-SMF的服务区域等依据，决定是否插入、更改或删除I-SMF，在MEC场景中，同样存在由于UE移动的因素，使SMF无法控制UPF而导致UE与MEC之间会话受到影响。
因此，本申请实施例提出了一种I-SMF选择方法，用以依据业务(例如，为需要使用MEC业务的UE)选择适合的I-SMF，保证UE与MEC之间会话与服务连续性。
针对上述场景，下面结合说明书附图对本申请实施例做进一步详细描述。
如图2所示，结合AF侧、PCF侧、SMF侧和AMF侧之间的交互，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，AF发送包含MEC对应的DNAI的请求信息AF request，PCF基于AF request生成新的PCC规则更新至SMF，SMF获取PCC规则中的DNAI发送给AMF，AMF基于DNAI选择I-SMF，具体包括如下步骤：
步骤201，AF创建请求信息，请求信息中包含MEC应用信息为DNAI，用于指示基于DNAI选择I-SMF。
具体实施时，AF通过调用Nnef_TrafficInfluence_Create服务操作，创建一个请求信息，信息中包含MEC对应的数据网接入标识符DNAI，也是部署MEC的DN所对应的DNAI，用于指示基于DNAI选择I-SMF，请求信息中 还可包含一个或一组UE ID(例如，通用公共用户标识(Generic Public Subscription Identifier，GPSI))。
步骤202，NEF接收请求信息并存储到UDR中。
具体实施时，AF发送请求信息到NEF，NEF存储AF请求到UDR中。
步骤203，UDR向PCF发送通知信息。
具体实施时，由于PCF向UDR订阅AF请求的变化，AF请求信息发生变化时，UDR通过发送通知信息的方式通知PCF，PCF可从通知信息中获得AF请求的请求信息。
步骤204，PCF依据请求信息，生成新的PCC规则。
一种可能的实施方式中，PCF可以直接接收AF发送的请求信息，依据请求信息，生成新的PCC规则，也即不需执行步骤203和204，AF在生成请求信息后，直接将请求信息发送给PCF。
步骤205，PCF向SMF发送新的PCC规则，PCC规则中包含MEC应用信息。
具体实施时，PCF可以通过调用Npcf_SMPolicyControl_UpdateNotify，将新的PCC规则发送给SMF。
步骤206，SMF从PCC规则中提取MEC应用信息，并生成I-SMF选择指示信息。
具体实施时，SMF接收到新的PCC规则后，从PCC规则中提取DNAI信息，并生成I-SMF选择指示信息，其中I-SMF选择指示信息中包含DNAI信息。
步骤207，SMF向AMF发送带有MEC应用信息的I-SMF选择指示信息。
步骤208，AMF根据I-SMF选择指示信息选择I-SMF。
具体实施时，AMF接收的I-SMF选择指示信息中包含DNAI信息，AMF根据DNAI信息选择I-SMF，例如，AMF根据I-SMF是否支持DNAI选择I-SMF，关于I-SMF是否支持DNAI的信息，可以从NRF获取。
如图3所示，结合AF侧、PCF侧、SMF侧和AMF侧之间的交互，本申 请实施例提供的一种中间会话管理功能I-SMF确定方法，AF发送包含MEC服务器地址/MEC应用服务器地址的AF request，PCF基于AF request生成新的PCC规则更新至SMF，SMF基于PCC规则选择I-SMF，或SMF从PCC规则中获取MEC服务器地址/MEC应用服务器地址发送给AMF，AMF基于MEC服务器地址/MEC应用服务器地址选择I-SMF，具体包括如下步骤：
步骤301，AF创建请求信息，请求信息中包含MEC服务器地址/MEC应用服务器地址，用于指示基于MEC服务器地址/MEC应用服务器地址选择I-SMF。
具体实施时，AF通过调用Nnef_TrafficInfluence_Create服务操作，创建一个请求信息，信息中包含MEC服务器地址/MEC应用服务器地址，用于指示基于MEC服务器地址/MEC应用服务器地址，选择I-SMF，请求信息中包含一个或一组UE ID(例如，GPSI)。
步骤302，NEF接收请求信息并存储到UDR中。
具体实施时，AF发送请求信息到NEF，NEF存储AF请求到UDR中。
步骤303，UDR向PCF发送通知信息。
具体实施时，由于PCF向UDR订阅AF请求的变化，AF请求信息发生变化时，UDR通过发送通知信息的方式通知PCF，PCF可从通知信息中获得AF请求的请求信息。
步骤304，PCF根据请求信息，生成新的PCC规则，PCC规则中包含MEC服务器地址/MEC应用服务器地址。
一种可能的实施方式中，PCF可以直接接收AF发送的请求信息，依据请求信息，生成新的PCC规则，也即不需执行步骤303和304，AF在生成请求信息后，直接将请求信息发送给PCF。
步骤305，PCF向SMF发送新的PCC规则，PCC规则中包含MEC服务器地址/MEC应用服务器地址。
具体实施时，PCF通过调用Npcf_SMPolicyControl_UpdateNotify，将PCC规则发送给SMF。
步骤306，SMF在新的PCC规则中获取MEC服务器地址/MEC应用服务器地址，并发送至AMF。
步骤307，AMF根据MEC服务器地址/MEC应用服务器地址选择I-SMF。
具体实施时，AMF根据接收SMF发送的MEC服务器地址/MEC应用服务器地址选择合适的I-SMF，例如I-SMF的服务区域能覆盖接入MEC，I-SMF能否通过对应的UPF接入MEC。
一种可能的实施方式中，执行步骤305后，由SMF根据PCC规则，选择I-SMF。
如图4所示，结合AF侧、PCF侧、SMF侧和AMF侧之间的交互，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，AF发送包含MEC应用属性信息的AF request，MEC应用属性信息包括应用及应用实例的分布，服务能力、负载、生命周期，及其相应的MEC服务器地址/MEC应用服务器地址等。PCF基于AF request生成新的PCC规则更新至SMF。SMF基于PCC规则选择I-SMF，或将SMF从PCC规则中获取MEC应用属性信息发送给AMF，由AMF基于MEC应用属性信息选择I-SMF，具体包括如下步骤：
步骤401，AF创建请求信息，请求信息中包含MEC应用信息为MEC应用属性信息，用于指示基于MEC应用属性信息选择I-SMF。
具体实施时，AF通过调用Nnef_TrafficInfluence_Create服务操作，创建一个请求信息，信息中包含MEC应用属性信息(包括应用及应用实例的分布，服务能力、服务类型、负载、生命周期，用于为I-SMF选择、流量路由、流量导向等提供信息)，用于指示基于MEC应用属性信息选择I-SMF，请求信息中包含一个或一组UE ID(例如，GPSI)。
步骤402，NEF接收请求信息并存储到UDR中。
具体实施时，AF发送请求信息到NEF，NEF存储AF请求到UDR中。
步骤403，UDR向PCF发送通知信息。
具体实施时，由于PCF向UDR订阅AF请求的变化，AF请求信息发生变化时，UDR通过发送通知信息的方式通知PCF，PCF可从通知信息中获得 AF请求的请求信息。
步骤404，PCF根据请求信息，生成新的PCC规则。
一种可能的实施方式中，PCF可以直接接收AF发送的请求信息，依据请求信息，生成新的PCC规则，也即不需执行步骤403和404，AF在生成请求信息后，直接将请求信息发送给PCF。
一种可能的实施方式中，PCF可以直接接收AF发送的请求信息，依据请求信息，生成新的PCC规则，也即不需执行步骤502和503，AF在生成请求信息后，直接将请求信息发送给PCF。
步骤405，PCF向SMF发送新的PCC规则，PCC规则中包含MEC应用属性信息。
具体实施时，PCF通过调用Npcf_SMPolicyControl_UpdateNotify，将PCC规则发送给SMF。
步骤406，SMF在新的PCC规则中获取MEC应用属性信息，并发送至AMF。
步骤407，AMF根据MEC应用属性信息选择I-SMF。
具体实施时，AMF根据接收SMF发送的MEC应用属性信息选择合适的I-SMF，例如基于MEC应用的服务类型、位置、I-SMF的服务区域，能否接入MEC等选择I-SMF。
一种可能的实施方式中，执行步骤405后，可以不需进行步骤406和步骤407，由SMF根据PCC规则，选择I-SMF。
如图5所示，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于AF侧，包括如下步骤：
步骤501，创建请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF。
具体实施时，AF可以通过调用Nnef_TrafficInfluence_Create服务操作，创建一个请求信息AF request，请求信息中包含MEC应用信息，MEC应用信 息可以是MEC对应的DNAI、MEC服务器地址、MEC应用属性信息中的一种或多种，其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期，也即MEC应用信息相关信息。
请求信息中的MEC应用信息为MEC应用属性信息时，可以为I-SMF选择、流量路由、流量导向等提供信息。
由AMF生成的请求信息，用于指示AMF或者SMF在选择I-SMF时，基于MEC应用信息进行I-SMF的选择，实现为MEC选择合适的I-SMF，以保证UE与MEC之间会话和服务的连续性，尤其是在UE移动时。
需要说明的是，AF创建的请求信息中还可以包括一个UE ID或一组UE ID(例如，GPSI)。
步骤502，向网络开放功能NEF或者策略控制功能PCF发送请求信息。
具体实施时，AF将生成的请求信息发送给NEF，使NEF将请求信息存储到UDR中，PCF可以通过向UDR订阅请求信息的变化，从通知信息中获得请求信息。
或者，AF将生成的请求信息直接发送给PCF。
如图6所示，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于PCF侧，包括如下步骤：
步骤601，获取应用功能AF发送的请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF。
具体实施时，PCF直接获取由AF发送给PCF的请求信息，PCF通过向UDR订阅AF发送到NEF的请求信息，当请求信息变化时，PCF通过通知信息，从中获得AF发送的请求信息。
PCF获取的请求信息中，包含MEC应用信息，MEC应用信息可以是DNAI、MEC服务器地址、MEC应用属性信息中的一种或多种，其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期，也即MEC业务相关信息。
步骤602，根据请求信息，生成包含MEC应用信息的策略控制和计费PCC规则。
具体实施时，PCF根据获取AF发送的请求信息，生成新的PCC规则，新的PCC规则中的包含MEC应用信息。
步骤603，将PCC规则发送至会话管理功能SMF。
具体实施时，PCF通过调用Npcf_SMPolicyControl_UpdateNotify将生成的PCC规则发送到SMF，也即将新规则更新SMF。
如图7所示，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于SMF侧，包括如下步骤：
步骤701，接收策略控制功能PCF发送的PCC规则，PCC规则中包含移动边缘计算MEC应用信息。
具体实施时，SMF接收PCF发送的PCC规则，更新SMF中的PCC规则，接收的PCC规则中包含MEC应用信息，第一类MEC应用信息可以是MEC对应的DNAI，第二类MEC应用信息可以是MEC服务器地址、MEC应用服务器地址、MEC应用属性信息中的一种或多种，其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
步骤702，在确定PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于第一类MEC应用信息，生成I-SMF选择指示信息，并将I-SMF选择指示信息发送至接入与移动性管理功能AMF，I-SMF选择指示信息用于指示AMF在选择I-SMF时基于第一类MEC应用信息确定I-SMF。
具体实施时，SMF确定接收的PCC规则中包含的MEC应用信息为第一类MEC应用信息时，也即MEC对应的DNAI时，可以从PCC规则中提取DNAI信息，生成I-SMF选择指示信息，并发送给AMF，用于指示AMF在重新确定I-SMF时，根据第一类MEC应用信息，也即DNAI选择合适的I-SMF。
步骤703，在确定PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定 I-SMF，或者在包含第二类MEC应用信息的PCC规则中提取第二类MEC应用信息，将第二类MEC应用信息转发至接入与移动性管理功能AMF。
具体实施时，SMF确定接收的PCC规则中包含的MEC应用信息为第二类MEC应用信息时，也即MEC服务器地址、MEC应用服务器地址、MEC应用属性信息中的一种或多种，其中MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
确定PCC规则中的第二类MEC应用信息时，SMF可以直接在选择I-SMF时基于第二类MEC应用信息确定I-SMF，或者PCC规则中提取第二类MEC应用信息，并将第二类MEC应用信息发送给AMF。
如图8所示，本申请实施例提供的一种中间会话管理功能I-SMF确定方法，应用于AMF侧，包括如下步骤：
步骤801，接收会话管理功能SMF发送的I-SMF选择指示信息，I-SMF选择指示信息中包含第一类MEC应用信息。
具体实施时，AMF接收到SMF发送的I-SMF选择指示信息，用于指示AMF根据指示信息中包含第一类MEC应用信息(例如，DNAI)选择合适的I-SMF。
步骤802，根据第一类MEC应用信息在选择I-SMF时确定I-SMF。
具体实施时，AMF在选择I-SMF时，根据DNAI选择合适的I-SMF，例如，AMF根据I-SMF是否支持DNAI选择I-SMF，关于I-SMF是否支持DNAI的信息，可以从NRF获取。AMF还可以执行I-SMF的插入或改变操作流程。
一种可能的实施方式中，AMF接收SMF发送的第二类MEC应用信息；
根据第二类MEC应用信息在选择I-SMF时确定I-SMF。
具体实施时，接收SMF发送的第二类MEC应用信息，AMF根据第二类MEC应用信息选择合适的I-SMF，例如，根据I-SMF的服务区域能覆盖接入MEC、能否通过对应的UPF接入MEC等确定I-SMF。
PCC规则中包含的第二类MEC应用信息为MEC应用属性信息(例如，MEC应用相关信息)时，MEC应用属性信息，包括：应用及应用实例的分布、 服务能力、服务类型、负载、生命周期中的一种或几种，AMF根据PCC规则中的第二类MEC应用信息选择合适的I-SMF，例如，基于MEC应用的服务类型、位置、I-SMF的服务区域、能否接入MEC等确定I-SMF。
需要说明的是，MEC应用属性信息可以用于I-SMF选择，还可以用于为流量路由、流量导向等环节提供信息。另外，在确定I-SMF时还可以结合一个UE ID或一组UE ID(例如，通用公共用户标识GPSI)进行确定。
基于相同的发明构思，本申请实施例还提供一种中间会话管理功能I-SMF确定设备，由于该设备即是本申请实施例中的方法中的设备，并且该设备解决问题的原理与该方法相似，因此该设备的实施可以参见方法的实施，重复之处不再赘述。
如图9所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于应用功能AF侧，包括：处理器900、存储器901和收发机902。
处理器900负责管理总线架构和通常的处理，存储器901可以存储处理器900在执行操作时所使用的数据。收发机902用于在处理器900的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器900代表的一个或多个处理器和存储器901代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器900负责管理总线架构和通常的处理，存储器901可以存储处理器900在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器900中，或者由处理器900实现。在实现过程中，信号处理流程的各步骤可以通过处理器900中的硬件的集成逻辑电路或者软件形式的指令完成。处理器900可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或 者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器901，处理器900读取存储器901中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器900，用于读取存储器901中的程序并执行下列过程：
创建请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
向网络开放功能NEF或者策略控制功能PCF发送请求信息。
可选的，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期。
如图10所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于策略控制功能PCF侧，包括：处理器1000、存储器1001和收发机1002。
处理器1000负责管理总线架构和通常的处理，存储器1001可以存储处理器1000在执行操作时所使用的数据。收发机1002用于在处理器1000的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器1000代表的一个或多个处理器和存储器1001代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器1000负责管理总线架构和通常的处理，存储器1001可以存储处理器1000在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器1000中，或者由处理器1000实现。在实现过程中，信号处理流程的各步骤可以通过处理器1000中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1000可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1001，处理器1000读取存储器1001中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器1000，用于读取存储器1001中的程序并执行下列过程：
获取应用功能AF发送的请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
根据请求信息，生成包含MEC应用信息的策略控制和计费PCC规则；
将PCC规则发送至会话管理功能SMF。
可选的，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
如图11所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于会话管理功能SMF侧，包括：处理器1100、存储器1101和收发机1102。
处理器1100负责管理总线架构和通常的处理，存储器1101可以存储处理器1100在执行操作时所使用的数据。收发机1102用于在处理器1100的控 制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器1100代表的一个或多个处理器和存储器1101代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器1100负责管理总线架构和通常的处理，存储器1101可以存储处理器1100在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器1100中，或者由处理器1100实现。在实现过程中，信号处理流程的各步骤可以通过处理器1100中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1100可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1101，处理器1100读取存储器1101中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器1100，用于读取存储器1101中的程序并执行下列过程：
接收策略控制功能PCF发送的PCC规则，PCC规则中包含移动边缘计算MEC应用信息；
在确定PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于第一类MEC应用信息，生成I-SMF选择指示信息，并将I-SMF选择指示信息发送至接入与移动性管理功能AMF，I-SMF选择指示信息用于指示AMF在选择I-SMF时基于第一类MEC应用信息确定I-SMF；
在确定PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根 据PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定I-SMF，或者在包含第二类MEC应用信息的PCC规则中提取第二类MEC应用信息，将第二类MEC应用信息转发至接入与移动性管理功能AMF。
可选的，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
可选的，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
如图12所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于会话管理功能AMF侧，包括：处理器1200、存储器1201和收发机1202。
处理器1200负责管理总线架构和通常的处理，存储器1201可以存储处理器1200在执行操作时所使用的数据。收发机1202用于在处理器1200的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器1200代表的一个或多个处理器和存储器1201代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器1200负责管理总线架构和通常的处理，存储器1201可以存储处理器1200在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器1200中，或者由处理器1200实现。在实现过程中，信号处理流程的各步骤可以通过处理器1200中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1200可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体 现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1201，处理器1200读取存储器1201中的信息，结合其硬件完成信号处理流程的步骤。
其中，处理器1200，用于读取存储器1201中的程序并执行下列过程：
接收会话管理功能SMF发送的I-SMF选择指示信息，I-SMF选择指示信息中包含第一类MEC应用信息；
根据第一类MEC应用信息在选择I-SMF时确定I-SMF。
可选的，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
可选的，处理器还用于：
接收SMF发送的第二类MEC应用信息；
根据第二类MEC应用信息在选择I-SMF时确定I-SMF。
可选的，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
基于相同的发明构思，本申请实施例中还提供了一种中间会话管理功能I-SMF确定设备，由于该设备即是本申请实施例中的方法中的设备，并且该设备解决问题的原理与该方法相似，因此该设备的实施可以参见方法的实施，重复之处不再赘述。
如图13所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于应用功能AF侧，该设备包括处理模块1301和发送模块1302，其中，
处理模块1301，用于创建请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF。
发送模块1302，用于向网络开放功能NEF或者策略控制功能PCF发送请求信息。
可选的，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期。
如图14所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于策略控制功能PCF侧，该设备包括获取模块1401，处理模块1402和发送模块1403，其中，
获取模块1401，用于获取应用功能AF发送的请求信息，请求信息中包含移动边缘计算MEC应用信息，请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于MEC应用信息选择I-SMF；
处理模块1402，用于根据请求信息，生成包含MEC应用信息的策略控制和计费PCC规则；
发送模块1403，用于将PCC规则发送至会话管理功能SMF。
可选的，MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
如图15所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于会话管理功能SMF侧，该设备包括接收模块1501，第一处理模块1502和第二处理模块1503，其中，
接收模块1501，用于接收策略控制功能PCF发送的PCC规则，PCC规则中包含移动边缘计算MEC应用信息；
第一处理模块1502，用于在确定PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于第一类MEC应用信息，生成I-SMF选择指示信息，并将I-SMF选择指示信息发送至接入与移动性管理功能AMF，I-SMF选 择指示信息用于指示AMF在选择I-SMF时基于第一类MEC应用信息确定I-SMF；
第二处理模块1503，用于在确定PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定I-SMF，或者在包含第二类MEC应用信息的PCC规则中提取第二类MEC应用信息，将第二类MEC应用信息转发至接入与移动性管理功能AMF。
可选的，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
可选的，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
如图16所示，本申请实施例提供的一种中间会话管理功能I-SMF确定设备，应用于接入与移动性管理功能AMF侧，该设备包括第一接收模块1601和第一确定模块1602，其中，
第一接收模块1601，用于接收会话管理功能SMF发送的I-SMF选择指示信息，I-SMF选择指示信息中包含第一类MEC应用信息；
第一确定模块1602，用于根据第一类MEC应用信息在选择I-SMF时确定I-SMF。
可选的，第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
可选的，设备还包括：
第二接收模块1603，用于接收SMF发送的第二类MEC应用信息；
第二确定模块1604，用于根据第二类MEC应用信息在选择I-SMF时确定I-SMF。
可选的，第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
其中，MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务 能力、服务类型、负载、以及生命周期。
本申请实施例还提供一种计算机可读非易失性存储介质，包括程序代码，当程序代码在计算终端上运行时，程序代码用于使计算终端执行上述本申请实施例中间会话管理功能I-SMF确定方法的步骤。
以上参照示出根据本申请实施例的方法、装置(系统)和/或计算机程序产品的框图和/或流程图描述本申请。应理解，可以通过计算机程序指令来实现框图和/或流程图示图的一个块以及框图和/或流程图示图的块的组合。可以将这些计算机程序指令提供给通用计算机、专用计算机的处理器和/或其它可编程数据处理装置，以产生机器，使得经由计算机处理器和/或其它可编程数据处理装置执行的指令创建用于实现框图和/或流程图块中所指定的功能/动作的方法。
相应地，还可以用硬件和/或软件(包括固件、驻留软件、微码等)来实施本申请。更进一步地，本申请可以采取计算机可使用或计算机可读存储介质上的计算机程序产品的形式，其具有在介质中实现的计算机可使用或计算机可读程序代码，以由指令执行系统来使用或结合指令执行系统而使用。在本申请上下文中，计算机可使用或计算机可读介质可以是任意介质，其可以包含、存储、通信、传输、或传送程序，以由指令执行系统、装置或设备使用，或结合指令执行系统、装置或设备使用。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (34)

  1. 一种中间会话管理功能I-SMF确定方法，应用于应用功能AF侧，其特征在于，该方法包括：
    创建请求信息，所述请求信息中包含移动边缘计算MEC应用信息，所述请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于所述MEC应用信息选择I-SMF；
    向网络开放功能NEF或者策略控制功能PCF发送所述请求信息。
  2. 根据权利要求1所述的方法，其特征在于，所述MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期。
  3. 一种中间会话管理功能I-SMF确定方法，应用于策略控制功能PCF侧，其特征在于，该方法包括：
    获取应用功能AF发送的请求信息，所述请求信息中包含移动边缘计算MEC应用信息，所述请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于所述MEC应用信息选择I-SMF；
    根据所述请求信息，生成包含所述MEC应用信息的策略控制和计费PCC规则；
    将所述PCC规则发送至会话管理功能SMF。
  4. 根据权利要求3所述的方法，其特征在于，所述MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  5. 一种中间会话管理功能I-SMF确定方法，应用于会话管理功能SMF 侧，其特征在于，该方法包括：
    接收策略控制功能PCF发送的PCC规则，所述PCC规则中包含移动边缘计算MEC应用信息；
    在确定所述PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于所述第一类MEC应用信息，生成I-SMF选择指示信息，并将所述I-SMF选择指示信息发送至接入与移动性管理功能AMF，所述I-SMF选择指示信息用于指示所述AMF在选择I-SMF时基于所述第一类MEC应用信息确定I-SMF；
    在确定所述PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据所述PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定I-SMF，或者在所述包含第二类MEC应用信息的PCC规则中提取所述第二类MEC应用信息，将所述第二类MEC应用信息转发至接入与移动性管理功能AMF。
  6. 根据权利要求5所述的方法，其特征在于，所述第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
  7. 根据权利要求5所述的方法，其特征在于，所述第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  8. 一种中间会话管理功能I-SMF确定方法，应用于接入与移动性管理功能AMF侧，其特征在于，该方法包括：
    接收会话管理功能SMF发送的I-SMF选择指示信息，所述I-SMF选择指示信息中包含第一类MEC应用信息；
    根据所述第一类MEC应用信息在选择I-SMF时确定I-SMF。
  9. 根据权利要求8所述的方法，其特征在于，所述第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
  10. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    接收SMF发送的第二类MEC应用信息；
    根据所述第二类MEC应用信息在选择I-SMF时确定I-SMF。
  11. 根据权利要求10所述的方法，其特征在于，所述第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  12. 一种中间会话管理功能I-SMF确定设备，应用于应用功能AF侧，其特征在于，该设备包括：处理器和存储器；
    其中，处理器，用于读取存储器中的程序并执行下列过程：
    创建请求信息，所述请求信息中包含移动边缘计算MEC应用信息，所述请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于所述MEC应用信息选择I-SMF；
    向网络开放功能NEF或者策略控制功能PCF发送所述请求信息。
  13. 如权利要求12所述的设备，其特征在于，所述MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、生命周期。
  14. 一种中间会话管理功能I-SMF确定设备，应用于策略控制功能PCF侧，其特征在于，该设备包括：处理器和存储器；
    其中，处理器，用于读取存储器中的程序并执行下列过程：
    获取应用功能AF发送的请求信息，所述请求信息中包含移动边缘计算MEC应用信息，所述请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于所述MEC应用信息选择I-SMF；
    根据所述请求信息，生成包含所述MEC应用信息的策略控制和计费PCC规则；
    将所述PCC规则发送至会话管理功能SMF。
  15. 根据权利要求14所述的设备，其特征在于，所述MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  16. 一种中间会话管理功能I-SMF确定设备，应用于会话管理功能SMF侧，其特征在于，该设备包括：处理器和存储器；
    其中，处理器，用于读取存储器中的程序并执行下列过程：
    接收策略控制功能PCF发送的PCC规则，所述PCC规则中包含移动边缘计算MEC应用信息；
    在确定所述PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于所述第一类MEC应用信息，生成I-SMF选择指示信息，并将所述I-SMF选择指示信息发送至接入与移动性管理功能AMF，所述I-SMF选择指示信息用于指示所述AMF在选择I-SMF时基于所述第一类MEC应用信息确定I-SMF；
    在确定所述PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据所述PCC规则中包含的第二类MEC应用信息在选择I-SMF时确定I-SMF，或者在所述包含第二类MEC应用信息的PCC规则中提取所述第二类MEC应用信息，将所述第二类MEC应用信息转发至接入与移动性管理功能AMF。
  17. 根据权利要求16所述的设备，其特征在于，所述第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
  18. 根据权利要求16所述的设备，其特征在于，所述第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  19. 一种中间会话管理功能I-SMF确定设备，应用于接入与移动性管理功能AMF侧，其特征在于，该设备包括：处理器和存储器；
    其中，处理器，用于读取存储器中的程序并执行下列过程：
    接收会话管理功能SMF发送的I-SMF选择指示信息，所述I-SMF选择指示信息中包含第一类MEC应用信息；
    根据所述第一类MEC应用信息在选择I-SMF时确定I-SMF。
  20. 根据权利要求19所述的设备，其特征在于，所述第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
  21. 根据权利要求19所述的设备，其特征在于，所述处理器还用于：
    接收SMF发送的第二类MEC应用信息；
    根据所述第二类MEC应用信息在选择I-SMF时确定I-SMF。
  22. 根据权利要求21所述的设备，其特征在于，所述第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  23. 一种中间会话管理功能I-SMF确定设备，应用于应用功能AF侧，其特征在于，该设备包括处理模块和发送模块，其中，
    所述处理模块，用于创建请求信息，所述请求信息中包含移动边缘计算MEC应用信息，所述请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于所述MEC应用信息选择I-SMF；
    所述发送模块，用于向网络开放功能NEF或者策略控制功能PCF发送所述请求信息。
  24. 根据权利要求23所述的设备，其特征在于，所述MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、 服务能力、服务类型、负载、生命周期。
  25. 一种中间会话管理功能I-SMF确定设备，应用于策略控制功能PCF侧，其特征在于，该设备包括获取模块，处理模块和发送模块，其中，
    所述获取模块，用于获取应用功能AF发送的请求信息，所述请求信息中包含移动边缘计算MEC应用信息，所述请求信息用于指示接入与移动性管理AMF或者会话管理功能SMF在选择I-SMF时，基于所述MEC应用信息选择I-SMF；
    所述处理模块，用于根据所述请求信息，生成包含所述MEC应用信息的策略控制和计费PCC规则；
    所述发送模块，用于将所述PCC规则发送至会话管理功能SMF。
  26. 根据权利要求25所述的设备，其特征在于，所述MEC应用信息包括以下一种或多种：MEC对应的数据网接入标识符DNAI、MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  27. 一种中间会话管理功能I-SMF确定设备，应用于会话管理功能SMF侧，其特征在于，该设备包括接收模块，第一处理模块和第二处理模块，其中，
    所述接收模块，用于接收策略控制功能PCF发送的PCC规则，所述PCC规则中包含移动边缘计算MEC应用信息；
    所述第一处理模块，用于在确定所述PCC规则中包含的MEC应用信息为第一类MEC应用信息时，基于所述第一类MEC应用信息，生成I-SMF选择指示信息，并将所述I-SMF选择指示信息发送至接入与移动性管理功能AMF，所述I-SMF选择指示信息用于指示所述AMF在选择I-SMF时基于所述第一类MEC应用信息确定I-SMF；
    所述第二处理模块，用于在确定所述PCC规则中包含的MEC应用信息为第二类MEC应用信息时，根据所述PCC规则中包含的第二类MEC应用信 息在选择I-SMF时确定I-SMF，或者在所述包含第二类MEC应用信息的PCC规则中提取所述第二类MEC应用信息，将所述第二类MEC应用信息转发至接入与移动性管理功能AMF。
  28. 根据权利要求27所述的设备，其特征在于，所述第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
  29. 根据权利要求27所述的设备，其特征在于，所述第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  30. 一种中间会话管理功能I-SMF确定设备，应用于接入与移动性管理功能AMF侧，其特征在于，该设备包括第一接收模块和第一确定模块，其中，
    所述第一接收模块，用于接收会话管理功能SMF发送的I-SMF选择指示信息，所述I-SMF选择指示信息中包含第一类MEC应用信息；
    所述第一确定模块，用于根据所述第一类MEC应用信息在选择I-SMF时确定I-SMF。
  31. 根据权利要求30所述的设备，其特征在于，所述第一类MEC应用信息为MEC对应的数据网接入标识符DNAI。
  32. 根据权利要求30所述的设备，其特征在于，所述设备还包括：
    第二接收模块，用于接收SMF发送的第二类MEC应用信息；
    第二确定模块，用于根据所述第二类MEC应用信息在选择I-SMF时确定I-SMF。
  33. 根据权利要求32所述的设备，其特征在于，所述第二类MEC应用信息包括以下一种或多种：MEC服务器地址、MEC应用服务器地址、MEC应用属性信息；
    其中，所述MEC应用属性信息包括MEC应用、MEC应用实例的分布、服务能力、服务类型、负载、以及生命周期。
  34. 一种计算机存储介质，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现如权利要求1～11任一所述的方法的步骤。
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WO2023213322A1 (zh) * 2022-05-06 2023-11-09 大唐移动通信设备有限公司 迁移边缘应用服务器的方法、装置、网元及存储介质

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