WO2023280066A1 - 会话管理功能实体发现方法、网络功能节点、接入和移动性管理功能实体、电子设备和计算机可读存储介质 - Google Patents

会话管理功能实体发现方法、网络功能节点、接入和移动性管理功能实体、电子设备和计算机可读存储介质 Download PDF

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WO2023280066A1
WO2023280066A1 PCT/CN2022/103315 CN2022103315W WO2023280066A1 WO 2023280066 A1 WO2023280066 A1 WO 2023280066A1 CN 2022103315 W CN2022103315 W CN 2022103315W WO 2023280066 A1 WO2023280066 A1 WO 2023280066A1
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Prior art keywords
smf
group
preferred
information
request message
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PCT/CN2022/103315
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English (en)
French (fr)
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陶望胜
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中兴通讯股份有限公司
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Priority to JP2024500451A priority Critical patent/JP2024525091A/ja
Priority to EP22836817.1A priority patent/EP4346286A1/en
Priority to KR1020237045457A priority patent/KR20240014536A/ko
Publication of WO2023280066A1 publication Critical patent/WO2023280066A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/50Network services
    • H04L67/51Discovery or management thereof, e.g. service location protocol [SLP] or web services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/12Setup of transport tunnels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4641Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H04L12/4675Dynamic sharing of VLAN information amongst network nodes
    • H04L12/4679Arrangements for the registration or de-registration of VLAN attribute values, e.g. VLAN identifiers, port VLAN membership
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08Upper layer protocols
    • H04W80/10Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/04Arrangements for maintaining operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/11Allocation or use of connection identifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/14Backbone network devices

Definitions

  • the present disclosure relates to the field of communication technologies, and specifically relates to a discovery method for a session management function entity, a network function node, an access and mobility management function entity, an electronic device, and a computer-readable storage medium.
  • 3GPP (3rd Generation Partnership Project, third generation partnership project) R16 version introduces support for 5G (The 5th Generation Mobile Communications, fifth generation mobile communication) LAN (Local Area Network, local area network) service, providing services similar to private communication of LAN .
  • 5G The 5th Generation Mobile Communications, fifth generation mobile communication
  • LAN Local Area Network, local area network
  • Users under the same 5G LAN form a 5G VN (Virtual Network, virtual network) group, and each 5G VN group is assigned a 5G VN group ID.
  • the existing 3GPP standard requires that the same 5G VN group can only belong to one SMF (Session Management Function, session management function entity), but this limitation will lead to reduced reliability of communication. For example, if the SMF to which the 5G VN group belongs fails, it may It will cause users in the 5G VN group to be unable to communicate. In order to ensure the availability of the 5G LAN network, the same 5G VN group will be assigned to multiple SMFs during actual deployment. However, the same 5G VN group belongs to multiple SMFs, and the UEs (User Equipment, user equipment) on both sides of the communication perform data routing and forwarding through two different A-UPFs (Anchor User Plane Function, anchor user plane functional entities). Delay and network load is heavy.
  • SMF Session Management Function, session management function entity
  • an embodiment of the present disclosure provides a method for discovering a session management function entity (SMF), which is applied to a session creation process, including:
  • the SMF session management function entity
  • VN virtual network
  • the preferred SMF is a SMF in the SMF set
  • the embodiment of the present disclosure also provides an SMF discovery method, which is applied to the session creation process, including:
  • SMF session management function
  • AMF access and mobility management function
  • the embodiment of the present disclosure also provides a SMF discovery method, including:
  • a session creation request message sent by a user equipment (UE) sending a first request message to a network function node (NF), where the first request message is configured to instruct the NF to determine the virtual network (
  • the preferred SMF of the VN) group the preferred SMF is a SMF in the SMF set, and the SMF in the SMF set is the SMF to which the VN group belongs;
  • an embodiment of the present disclosure further provides a network function node, including a first processing module, an SMF discovery module, and a sending module, the first processing module is configured to respond to receiving an access and mobility management function entity ( The first request message sent by AMF) determines the session management function entity (SMF) set, and the SMF in the SMF set is the virtual network (VN) group to which the user equipment that accesses the AMF and requests to create a session belongs to SMF;
  • SMF session management function entity
  • the sending module is configured to send the information of the preferred SMF to the AMF.
  • the processing module is configured to determine the SMF set of the VN group according to the information of the VN group and the second mapping relationship between the information of the VN group and the information of the SMF;
  • an embodiment of the present disclosure also provides an access and mobility management functional entity, including an SMF discovery module configured to, in response to receiving a session creation request message sent by a user equipment (UE), send A network function node (NF) sends a first request message, the first request message is configured to instruct the NF to determine the preferred SMF of the virtual network (VN) group where the UE is located, and the preferred SMF is one of the SMF set
  • the SMF wherein the SMF in the SMF set is the SMF to which the VN group belongs; receives the preferred SMF information sent by the NF, and sends a session creation request message to the preferred SMF corresponding to the preferred SMF information.
  • an embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the foregoing SMF discovery method is implemented.
  • FIGS. 1a to 1c are schematic diagrams of three modes of data routing and forwarding between user equipments under a 5G local area network (LAN) provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a method for discovering a session management function (SMF) with a network function node (NF) as the execution subject provided by an embodiment of the present disclosure
  • SMF session management function
  • NF network function node
  • FIG. 4 is a schematic flowchart of an SMF discovery method with a group management function entity (GMF) as an execution subject provided by an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of an SMF discovery method with an access and mobility management function entity (AMF) as the execution subject provided by an embodiment of the present disclosure
  • FIG. 6 is a schematic flow diagram of an AMF re-initiating a session creation request provided by an embodiment of the present disclosure
  • FIG. 7 is a signaling flow chart of the SMF discovery method in which the GMF and the group preferred SMF selection function entity (GPSSF) are respectively deployed in different NF scenarios provided by an embodiment of the present disclosure;
  • GMF group preferred SMF selection function entity
  • FIG. 8 is a signaling flowchart of an SMF discovery method in which GMF and GPSSF are deployed in the same NF scenario provided by an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of a signaling process for registering an SMF with a NF deploying a GMF provided by an embodiment of the present disclosure
  • 10 to 12 are schematic structural diagrams of NFs provided by embodiments of the present disclosure.
  • FIG. 13 and 14 are schematic structural diagrams of NFs (NFs with GMF deployed) provided by embodiments of the present disclosure.
  • 15 and 16 are schematic structural diagrams of the AMF provided by the embodiments of the present disclosure.
  • VN Virtual Network, virtual network
  • A-UPF Anchor User Plane Function, anchor user plane functional entity
  • DN Data Network, data network
  • the same 5G VN Groups belong to multiple SMFs.
  • the current 3GPP standard cannot guarantee that the PDU sessions under the same 5G VN group select the same SMF, and thus cannot take advantage of the advantages of local routing under the 5G LAN service.
  • An embodiment of the present disclosure provides a SMF discovery method.
  • AMF Access and Mobility Management Function, access and mobility management function Entities
  • the creation of a PDU session in a 5G scenario is taken as an example for illustration.
  • the SMF discovery method provided by the embodiment of the present disclosure is applied to the session creation process, including steps 11 to 13 .
  • Step 11 in response to receiving the first request message sent by the AMF, determine an SMF set, where the SMFs in the SMF set are the SMFs to which the VN group of the UE that accesses the AMF and requests to create a session belongs.
  • a VN group includes multiple UEs. If UEs in the same VN group want to conduct PDU sessions, they must first register with the AMF. UEs in the same VN group can register with the same AMF or different AMFs. The UE can create a PDU session only after it completes the registration with the AMF. After the UE in the VN group completes the AMF registration, if it wants to communicate with other UEs in the VN group, it sends a PDU session creation request message to the registered AMF, and after receiving the PDU session creation request message, the AMF sends a message to the NF( Network Function, network function node) sends the first request message.
  • the NF Network Function, network function node
  • the NF receives the first request message sent by the AMF, and determines the SMF set according to the first request message.
  • the SMF set is composed of at least two SMFs, and these SMFs are the SMFs to which the VN group of the UE that accesses the AMF and requests to create a PDU session belongs.
  • GMF Group Management Function, group management function entity
  • GPSSF Group Preferred SMF Selection Function, group preferred SMF selection function entity
  • GMF and GPSSF can be deployed separately on different NFs, and GMF and GPSSF can also be deployed on the same NF at the same time.
  • GMF and GPSSF can be used as a functional component of an existing NF or as a new NF .
  • the types and function settings of NF are different, and the corresponding first request messages are also different. The first request message and the processing flow will be described in detail for different NF types and function settings later.
  • Step 12 determine the preferred SMF of the VN group, where the preferred SMF is an SMF in the SMF set.
  • the NF determines the preferred SMF of the VN group, and the preferred SMF is an SMF in the SMF set.
  • the preferred SMF refers to the SMF that the AMF preferentially accesses.
  • the AMF preferentially accesses the preferred SMF and initiates a PDU session creation request to the preferred SMF. It should be noted that once the preferred SMF is determined, it will usually not change unless the preferred SMF fails to ensure that the AMF selects the same SMF for the PDU session of the same 5G VN group to access.
  • Step 13 send the information of the preferred SMF to the AMF.
  • An embodiment of the present disclosure provides an SMF discovery method, which is applied to the session creation process.
  • the SMF set is determined.
  • the SMF in the SMF set is the UE that accesses the AMF and requests to create a session.
  • the SMF to which the VN group belongs determine the preferred SMF of the VN group, and send the information of the preferred SMF to the AMF, where the preferred SMF is a SMF in the SMF set;
  • the SMF discovery method provided by the embodiment of the present disclosure is obtained from the VN group where the UE is located Select a preferred SMF from the SMF set to which it belongs.
  • the AMF accesses the preferred SMF and initiates a session creation request.
  • the SMF discovery method further includes the following steps: after receiving the first request message sent by the AMF, and before determining the preferred SMF of the VN group, obtaining the information of the VN group carried in the first request message.
  • the first mapping relationship between the information of the VN group and the information of the preferred SMF is stored in the NF. Once the preferred SMF can be determined according to the first mapping relationship, it means that the NF has selected the preferred SMF for the VN group (that is, it already exists.
  • the preferred SMF of the VN group in the process of creating a PDU session, if it is found that the preferred SMF of the VN group already exists in the NF, then in step 12, no need to re-determine the preferred SMF, but use the previously determined preferred SMF as The preferred SMF of the VN group; if it is found that the preferred SMF of the VN group does not exist in the NF, then in step 12, determine the preferred SMF, that is, select a SMF from the SMF set as the preferred SMF of the VN group.
  • the selecting a SMF from the SMF set as the preferred SMF of the VN group includes the following steps: using a pre-specified SMF in the SMF set as the preferred SMF of the VN group, or randomly selecting a SMF from the SMF set As the preferred SMF for the VN group. That is to say, the preferred SMF may be determined through static configuration, or may be determined through dynamic selection. In the static configuration mode, a SMF in the SMF set can be pre-specified as the preferred SMF by using configuration files or configuration parameters. In the dynamic selection mode, an SMF can be randomly selected from the SMF set as the preferred SMF.
  • the SMF discovery method further includes the following steps: after selecting a SMF from the SMF set as the preferred SMF of the VN group, establishing the first mapping between the information of the VN group and the information of the preferred SMF relation. By establishing the first mapping relationship between the information of the VN group and the information of the preferred SMF, it can be determined whether there is already a preferred SMF corresponding to the VN group in the NF by querying the first mapping relationship.
  • the information of the preferred SMF can be obtained directly. If the first mapping relationship is not queried, a preferred SMF is selected for the VN group. There is no need to select the preferred SMF every time, which simplifies the processing of the NF and ensures that the preferred SMF does not will change.
  • the first request message is an SMF discovery request message
  • the SMF discovery method further includes the following steps: after receiving the first request message sent by the AMF, obtaining The information of the VN group carried in the SMF discovery request message.
  • the determining the SMF set includes: determining the SMF set of the VN group according to the information of the VN group and the second mapping relationship between the information of the VN group and the information of the SMF.
  • the sending the information of the preferred SMF to the AMF includes: sending an SMF discovery response message to the AMF, and the SMF discovery response message carries There is information on the preferred SMF.
  • the NF that deploys both the GMF and the GPSSF returns an SMF discovery response message to the AMF, and the SMF discovery response message carries the information of the preferred SMF.
  • the SMF discovery response message may also carry an SMF set, so that if the subsequent AMF fails to initiate a PDU session creation request to the preferred SMF, the AMF may select another SMF from the SMF set to re-initiate the PDU session creation request.
  • the first request message is a VN group preferred SMF selection request message
  • the determination of the SMF set includes the following steps: obtaining the VN group preferred SMF selection request message
  • the carried SMF set, the SMF set is determined by the GMF according to the second mapping relationship between the information of the VN group and the information of the SMF and the information of the VN group carried in the SMF discovery request message sent by the AMF, and sent to the AMF. That is to say, in the scenario where GMF and GPSSF are deployed in different NFs, AMF first sends an SMF discovery request message carrying VN group information to the NF (such as NF1) where GMF is deployed.
  • the NF such as NF1
  • the second mapping relationship between the SMF information determines the SMF set corresponding to the information of the VN group, and returns an SMF discovery response message carrying the SMF set to the AMF.
  • the AMF sends the VN group preferred SMF selection request message carrying the SMF set to the NF (such as NF2) where the GPSSF is deployed, and NF2 directly obtains the SMF set from the VN group preferred SMF selection request message.
  • NF such as NF2
  • the sending the information of the preferred SMF to the AMF includes: sending the VN carrying the information of the preferred SMF to the AMF Group Preferred SMF Select Response Message.
  • the NF2 deployed with the GPSSF returns a VN group preferred SMF selection response message to the AMF, and the VN group preferred SMF selection response message carries the preferred SMF information.
  • the SMF discovery method further includes the step of establishing a second mapping relationship between the information of the VN group and the information of the SMF, the second mapping relationship is established when the SMF is registered, and in conjunction with FIG. 3 below, The process of establishing the second mapping relationship between the information of the VN group and the information of the SMF is described in detail.
  • establishing the second mapping relationship between the information of the VN group and the information of the SMF includes steps 21 and 22 .
  • Step 21 in response to receiving the SMF registration request message sent by the SMF, acquire the information of the VN group carried in the SMF registration request message.
  • Step 22 establishing a second mapping relationship between the information of the VN group and the information of the SMF.
  • the SMF discovery method may further include the following step: after establishing the second mapping relationship between the information of the VN group and the information of the SMF (that is, step 22), returning a registration response message to the SMF.
  • the embodiment of the present disclosure also provides an SMF discovery method, as shown in FIG. 4 , the SMF discovery method includes steps 31 to 33.
  • Step 32 Determine the SMF set of the VN group according to the information of the VN group and the second mapping relationship between the information of the VN group and the information of the SMF.
  • the correspondence of the VN group can be determined according to the second mapping relationship.
  • the information of all SMFs in thus get the SMF set.
  • Step 33 sending an SMF discovery response message carrying the set of SMFs to the AMF, so that the AMF initiates a preferred SMF selection request.
  • the SMF discovery method also includes the step of establishing a second mapping relationship between the information of the VN group and the information of the SMF, the second mapping relationship is established when the SMF is registered, as shown in Figure 3
  • the establishment of the second mapping relationship between the information of the VN group and the information of the SMF includes the following steps 21 and 22.
  • Step 21 in response to receiving the SMF registration request message sent by the SMF, acquire the information of the VN group carried in the SMF registration request message.
  • the SMF sends an SMF registration request message to the NF where the GMF is deployed (it can be a NF that deploys GMF alone, or a NF that deploys GMF and GPSSF at the same time), so as to realize SMF registration.
  • the SMF registration request message It carries the information of the VN group corresponding to the SMF.
  • Step 22 establishing a second mapping relationship between the information of the VN group and the information of the SMF.
  • the NF deployed with the GMF establishes a second mapping relationship between the information of the VN group and the information of the SMF, and stores the second mapping relationship locally.
  • each SMF must register with the NF where the GMF is deployed. Therefore, the NF where the GMF is deployed can establish and store the second mapping relationship between the information of each SMF and the information of the corresponding VN group. In this way, the subsequent When determining the SMF set, the information of all SMFs in the VN group can be found directly according to the information of the VN group and the second mapping relationship, thereby obtaining the SMF set.
  • the SMF discovery method may further include the following step: after establishing the second mapping relationship between the information of the VN group and the information of the SMF (ie step 22), returning a registration response message to the SMF.
  • the embodiment of the present disclosure also provides a SMF discovery method, as shown in FIG. 5 , the SMF discovery method includes steps 41 to 43 .
  • Step 41 in response to receiving the session creation request message sent by the UE, send a first request message to the NF, the first request message is configured to instruct the NF to determine the preferred SMF of the VN group where the UE is located, and the preferred SMF is a SMF in the SMF set , the SMF in the SMF set is the SMF to which the VN group belongs.
  • a VN group includes multiple UEs. If UEs in the same VN group want to conduct PDU sessions, they must first register with the AMF. UEs in the same VN group can register with the same AMF or different AMFs. The UE can create a PDU session only after it completes the registration with the AMF. After the UE in the VN group completes the AMF registration, if it wants to communicate with other UEs in the VN group, it sends a PDU session creation request message to the registered AMF. After receiving the PDU session creation request message, the AMF sends a PDU session creation request message to the NF. The first request message is used to enable the NF to determine the preferred SMF of the VN group where the UE is located. The preferred SMF is an SMF in the SMF set, and the SMF in the SMF set is the SMF to which the VN group belongs.
  • Step 42 receiving the preferred SMF information sent by the NF.
  • the AMF receives the information of the preferred SMF sent by the NF of the corresponding type and function setting through different messages.
  • Step 43 Send a session creation request message to the preferred SMF corresponding to the preferred SMF information.
  • the SMF discovery method provided by the embodiment of the present disclosure is applied to the session creation process.
  • a first request message is sent to the NF.
  • the first request message is configured to instruct the NF to determine the VN group where the UE is located.
  • the preferred SMF is a SMF in the SMF set, and the SMF in the SMF set is the SMF to which the VN group belongs; receive the preferred SMF information sent by the NF, and send a session creation request to the preferred SMF corresponding to the preferred SMF information message; the SMF discovery method provided by the embodiment of the present disclosure selects a preferred SMF from the SMF set to which the VN group of the UE belongs.
  • the AMF accesses the preferred SMF and initiates a session creation request. Whether the UEs in the group access the same AMF or different AMFs, it can ensure that all AMFs access the same SMF as much as possible, that is, the UEs in the same VN group can directly perform local routing and forwarding through A-UPF. Under the premise of communication reliability, reduce communication delay and reduce network load.
  • the SMF discovery method further includes the following step: before sending a session creation request message to the preferred SMF corresponding to the information of the preferred SMF (that is, step 43), acquiring the SMF set.
  • the SMF discovery method further includes the following steps 44 and 45 .
  • Step 44 in response to receiving the session creation request failure message sent by the preferred SMF, select other SMFs except the preferred SMF from the SMF set.
  • the preferred SMF fails to create a PDU session, it returns a PDU session creation request failure message to the AMF.
  • the AMF can select another SMF from the SMF set according to the local policy (i.e. the substitute SMF ), initiate a PDU session creation request to the substitute SMF.
  • the local policy may be to pre-designate a substitute SMF, or to randomly select a substitute SMF. It should be noted that the local policy may also be used to define whether to select a substitute SMF after the preferred SMF fails to create a PDU session.
  • the first request message is an SMF discovery request message
  • the SMF discovery request message carries the information of the VN group where the UE is located
  • the preferred SMF sent by the receiving NF information that is, step 42
  • obtaining the SMF set includes the following steps: receiving the SMF discovery response message sent by the NF, obtaining the information and the SMF set of the preferred SMF carried in the SMF discovery response message, and the SMF set is determined by the NF according to the VN group
  • the information and the second mapping relationship between the information of the VN group and the information of the SMF are determined.
  • GMF and GPSSF are respectively deployed in different NFs, that is, NFs include a first NF (NF1) and a second NF (NF2), the first NF is NF1 on which GMF is deployed, and the second NF is NF1 on which GMF is deployed.
  • NF1 NF1
  • NF2 of the GPSSF.
  • the sending the first request message to the NF includes: sending a VN group preferred SMF selection request message carrying a SMF set to the second NF, and the VN group preferred SMF selection request message is configured to indicate The second NF determines the preferred SMF for the VN group.
  • AMF first sends an SMF discovery request message carrying information of the VN group to the first NF (NF1) where GMF is deployed, and the first NF (NF1) Determine the SMF set corresponding to the VN group information according to the second mapping relationship between the VN group information and the SMF information, and return the SMF discovery response message carrying the SMF set to the AMF.
  • the AMF sends the VN group preferred SMF selection request message carrying the SMF set to the second NF (NF2) where the GPSSF is deployed, and the second NF (NF2) obtains the SMF set in the VN group preferred SMF selection request message to determine the preferred SMF of the VN group SMF.
  • the VN group preferred SMF selection request message also carries the information of the VN group, so that the second NF (NF2) can determine whether the preferred SMF has been determined for the corresponding VN group based on the information of the VN group.
  • NF1 is the NF that deploys GMF separately
  • NF2 is The NF of GPSSF is deployed separately
  • the SMF set corresponding to the 5G VN group where the UE is located includes SMF1 and SMF2.
  • the SMF discovery process includes steps S1 to S9.
  • step S1 the UE registers with the 5G core network, that is, the UE registers with the AMF.
  • Step S5 the AMF sends the VN group preferred SMF selection request message to NF2 (i.e. the NF that deploys GPSSF alone), to initiate the 5G VN group preferred SMF selection request, and the VN group preferred SMF selection request message carries the information of the 5G VN group and SMF collection.
  • NF2 i.e. the NF that deploys GPSSF alone
  • Step S6 NF2 (that is, the NF that deploys GPSSF alone) judges whether to select the preferred SMF for the 5G VN group for the first time according to the first mapping relationship between the information of the VN group and the information of the preferred SMF, if NF2 is the first time for the 5G VN group Select the preferred SMF, select SMF1 from the SMF set as the preferred SMF of the 5G VN group through static configuration or dynamic selection, and establish the first mapping relationship between the information of the 5G VN group and the information of SMF1 locally; if NF2 The preferred SMF has been selected for the 5G VN group before, and the information of the preferred SMF (ie SMF1) previously selected for the 5G VN group is obtained; NF2 sends the VN group preferred SMF selection carrying the information of the preferred SMF (ie SMF1) to the AMF Respond to the message.
  • NF2 that is, the NF that deploys GPSSF alone
  • step S7 the AMF sends a PDU session creation request message to the preferred SMF1 (ie, the preferred SMF of the 5G VN group).
  • step S8 SMF1 returns a PDU session creation response message to AMF.
  • Step S9 if SMF1 returns a PDU session creation request failure message, AMF decides whether to continue to select other SMFs in the 5G VN group to continue to initiate the PDU session creation process according to the local policy; if it needs to continue to select other SMFs in the 5G VN group to continue to initiate PDUs session creation process, select another SMF to access from the SMF set, and send a PDU session creation request message to the other SMF; reject.
  • the SMF discovery process includes steps S81 to S89.
  • step S82 the UE sends a PDU session creation request message to the AMF to trigger the establishment of a PDU session under the 5G VN group.
  • the NF i.e., the NF deployed with GMF and GPSSF judges whether to select the preferred SMF for the 5G VN group for the first time according to the first mapping relationship between the information of the VN group and the information of the preferred SMF, if the NF is the first time for the 5G
  • the VN group selects the preferred SMF, selects SMF1 from the SMF set as the preferred SMF of the 5G VN group through static configuration or dynamic selection, and establishes the first mapping relationship between the information of the 5G VN group and the information of SMF1 locally; If the NF has selected the preferred SMF for the 5G VN group before, obtain the information of the preferred SMF (SMF1) previously selected for the 5G VN group.
  • step S86 the NF (that is, the NF deployed with the GMF and the GPSSF) sends an SMF discovery response message carrying the information of the SMF set and SMF1 to the AMF.
  • step S87 the AMF sends a PDU session creation request message to SMF1 (ie, the preferred SMF).
  • Step S89 if SMF1 returns the PDU session creation request failure message, AMF decides whether to continue to select other SMFs in the 5G VN group to continue to initiate the PDU session creation process according to the local policy; if it needs to continue to select other SMFs in the 5G VN group to continue to initiate the PDU session creation process, select another SMF to access from the SMF set, and send a PDU session creation request message to the other SMF; reject.
  • Fig. 9 is a signaling flow chart of the SMF registering with the NF (NF1) where the GMF is deployed. As shown in FIG. 9 , SMF registering with NF1 includes steps S10 to S30.
  • Step S10 SMF sends a registration request message to NF1, and the registration request message carries the information of the 5G VN group.
  • Step S20 NF1 establishes a second mapping relationship between the information of the 5G VN group and the information of the SMF.
  • Step S30 NF1 returns a registration response message to the SMF.
  • the SMF discovery method provided by the embodiments of the present disclosure introduces the GMF logical entity, which is responsible for 5G VN group information management; this logical entity can be used as an independent NF, or as a component of an existing NF; it also introduces a GPSSF logical entity, which is responsible for all information from the 5G VN group Among the group of SMFs that belong to, select the preferred SMF.
  • This logical entity can be used as an independent NF, or as a component of an existing NF, or can be merged with the GMF into the same NF.
  • the embodiment of the present disclosure also provides a network function node, as shown in FIG. 10 , including a first processing module 101 , an SMF discovery module 102 and a sending module 103 .
  • the first processing module 101 is configured to determine a session management function (SMF) set in response to receiving a first request message sent by an access and mobility management function (AMF), and the SMF in the SMF set is the access The AMF and request the SMF to which the virtual network (VN) group of the user equipment that creates the session belongs.
  • SMF session management function
  • AMF access and mobility management function
  • the sending module 103 is configured to send the information of the preferred SMF to the AMF.
  • the SMF discovery module 102 is further configured to, in response to not determining the preferred SMF corresponding to the information of the VN group according to the first mapping relationship between the information of the VN group and the information of the preferred SMF, from the SMF One SMF in the set is selected as the preferred SMF of the VN group.
  • the SMF discovery module 102 is configured to use a pre-specified SMF in the SMF set as the preferred SMF of the VN group, or randomly select a SMF from the SMF set as the preferred SMF of the VN group SMF.
  • the network function node further includes a second processing module 104, and the second processing module 104 is configured to select an SMF from the SMF set in the SMF discovery module 102 as the VN After the group's preferred SMF, a first mapping relationship between the information of the VN group and the information of the preferred SMF is established.
  • the first request message is an SMF discovery request message
  • the first processing module 101 is further configured to acquire the information of the VN group carried in the SMF discovery request message; and, according to the information of the VN group and the VN The second mapping relationship between group information and SMF information determines the SMF set of the VN group.
  • the sending module 103 is configured to send an SMF discovery response message to the AMF, where the SMF discovery response message carries the information of the preferred SMF.
  • the first request message is a VN group preferred SMF selection request message
  • the first processing module 101 is configured to obtain the SMF set carried in the VN group preferred SMF selection request message, and the SMF set is controlled by the group management function
  • the entity GMF determines according to the second mapping relationship between the information of the VN group and the information of the SMF and the information of the VN group carried in the SMF discovery request message sent by the AMF, and sends it to the AMF.
  • the network function node further includes a registration module 105, and the registration module 105 is configured to obtain the SMF registration request message carried in the SMF registration request message in response to receiving the SMF registration request message sent by the SMF. information of the VN group; and establishing a second mapping relationship between the information of the VN group and the information of the SMF.
  • the receiving module 201 is configured to receive a session management function (SMF) discovery request message sent by an access and mobility management function (AMF).
  • SMS session management function
  • AMF access and mobility management function
  • the sending module 204 is configured to send an SMF discovery response message carrying the set of SMFs to the AMF, so that the AMF initiates a preferred SMF selection request.
  • the network function node further includes a registration module 205, and the registration module 205 is configured to obtain the SMF registration request message carried in the SMF registration request message in response to receiving the SMF registration request message sent by the SMF. information of the VN group; and establishing a second mapping relationship between the information of the VN group and the information of the SMF.
  • the NF includes a first NF and a second NF
  • the first request message is a VN group preferred SMF selection request message
  • the obtaining module 302 is further configured to send the information carrying the VN group to the first NF
  • An SMF discovery request message the SMF discovery request message is configured to instruct the first NF to determine the SMF set; receive the SMF discovery response message sent by the first NF, and acquire the SMF set carried in the SMF discovery response message.
  • the SMF discovery module 301 is configured to send a VN group preferred SMF selection request message carrying the SMF set to the second NF, and the VN group preferred SMF selection request message is used to instruct the second NF to determine the VN group preferred SMF selection request message. SMF.
  • the VN group preferred SMF selection request message also carries the information of the VN group.
  • An embodiment of the present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the aforementioned SMF discovery method is implemented.
  • the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute.
  • Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit circuit.
  • Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media).
  • computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media.
  • Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

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Abstract

本公开提供一种会话管理功能实体(SMF)发现方法,应用于会话创建过程,包括响应于接收到接入和移动性管理功能实体(AMF)发送的第一请求消息,确定SMF集合,SMF集合中的SMF为接入AMF并请求创建会话的用户设备(UE)所在的虚拟网络(VN)组所归属的SMF;以及确定VN组的首选SMF,并将首选SMF的信息发送给AMF,首选SMF为SMF集合中的一个SMF;本公开还提供一种网络功能节点、一种接入和移动性管理功能实体、一种电子设备和一种计算机可读存储介质。

Description

会话管理功能实体发现方法、网络功能节点、接入和移动性管理功能实体、电子设备和计算机可读存储介质
相关申请的交叉引用
本申请要求于2021年7月6日提交的中国专利申请NO.202110760119.9的优先权,该中国专利申请的内容通过引用的方式整体合并于此。
技术领域
本公开涉及通信技术领域,具体涉及会话管理功能实体发现方法、网络功能节点、接入和移动性管理功能实体、电子设备和计算机可读存储介质。
背景技术
3GPP(3rd Generation Partnership Project,第三代合作伙伴计划)R16版本引入支持5G(The 5th Generation Mobile Communications,第五代移动通信)LAN(Local Area Network,本地局域网)服务,提供类似局域网私有通信的服务。同一个5G LAN下的用户组成了一个5G VN(Virture Network,虚拟网络)组,并为每个5G VN组都赋予了一个5G VN组ID。
现有3GPP标准要求同一个5G VN组只能归属一个SMF(Session Management Function,会话管理功能实体),但这种限制会导致通信的可靠性降低,比如若5G VN组归属的SMF故障时,可能会导致该5G VN组内的用户无法通信,为了保证5G LAN网络的可用性,实际部署时会将同一个5G VN组归属多个SMF。但是,同一个5G VN组归属多个SMF,通信双方的UE(User Equipment,用户设备)通过两个不同的A-UPF(Anchor User Plane Function,锚点用户面功能实体)进行数据路由转发,时延和网络负荷较大。
公开内容
第一方面,本公开实施例提供一种会话管理功能实体(SMF)发现方法,应用于会话创建过程,包括:
响应于接收到接入和移动性管理功能实体(AMF)发送的第一请求消息,确定会话管理功能实体(SMF)集合,所述SMF集合中的SMF为接入所述AMF并请求创建会话的用户设备所在的虚拟网络(VN)组所归属的SMF;
确定所述VN组的首选SMF,所述首选SMF为所述SMF集合中的一个SMF;以及
将所述首选SMF的信息发送给所述AMF。
又一方面,本公开实施例还提供一种SMF发现方法,应用于会话创建过程,包括:
响应于接收到接入和移动性管理功能实体(AMF)发送的会话管理功能实体(SMF)发现请求消息,获取所述SMF发现请求消息中携带的虚拟网络(VN)组的信息;
根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定所述VN组的SMF集合;以及
向所述AMF发送携带有所述SMF集合的SMF发现响应消息,以供所述AMF发起首选SMF选择请求。
又一方面,本公开实施例还提供一种SMF发现方法,包括:
响应于接收到用户设备(UE)发送的会话创建请求消息,向网络功能节点(NF)发送第一请求消息,所述第一请求消息配置为指示所述NF确定所述UE所在的虚拟网络(VN)组的首选SMF,所述首选SMF为SMF集合中的一个SMF,所述SMF集合中的SMF为所述VN组所归属的SMF;
接收所述NF发送的首选SMF的信息;以及
向所述首选SMF的信息对应的首选SMF发送会话创建请求消息。
又一方面,本公开实施例还提供一种网络功能节点,包括第一处理模块、SMF发现模块和发送模块,所述第一处理模块配置为响应 于接收到接入和移动性管理功能实体(AMF)发送的第一请求消息,确定会话管理功能实体(SMF)集合,所述SMF集合中的SMF为接入所述AMF并请求创建会话的用户设备所在的虚拟网络(VN)组所归属的SMF;
所述SMF发现模块配置为确定所述VN组的首选SMF,所述首选SMF为所述SMF集合中的一个SMF;以及
所述发送模块配置为将所述首选SMF的信息发送给所述AMF。
又一方面,本公开实施例还提供一种网络功能节点,包括接收模块、获取模块、处理模块和发送模块,所述接收模块配置为接收接入和移动性管理功能实体(AMF)发送的会话管理功能实体(SMF)发现请求消息;
所述获取模块配置为获取所述SMF发现请求消息中携带的虚拟网络(VN)组的信息;
所述处理模块配置为根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定所述VN组的SMF集合;以及
所述发送模块配置为向所述AMF发送携带有所述SMF集合的SMF发现响应消息,以供所述AMF发起首选SMF选择请求。
又一方面,本公开实施例还提供一种接入和移动性管理功能实体,包括SMF发现模块,所述SMF发现模块配置为响应于接收到用户设备(UE)发送的会话创建请求消息,向网络功能节点(NF)发送第一请求消息,所述第一请求消息配置为指示所述NF确定所述UE所在的虚拟网络(VN)组的首选SMF,所述首选SMF为SMF集合中的一个SMF,所述SMF集合中的SMF为所述VN组所归属的SMF;接收所述NF发送的首选SMF的信息,并向所述首选SMF的信息对应的首选SMF发送会话创建请求消息。
又一方面,本公开实施例还提供一种电子设备,包括:
至少一个处理器;以及
存储装置,其上存储有至少一个计算机程序;
当所述至少一个计算机程序被所述至少一个处理器执行时,使得所述至少一个处理器实现如前所述的SMF发现方法。
又一方面,本公开实施例还提供一种计算机可读存储介质,其上存储有计算机程序,所述计算机程序被处理器执行时实现如前所述的SMF发现方法。
附图说明
图1a至1c为本公开实施例提供的5G本地局域网(LAN)下用户设备之间数据路由转发的三种方式示意图;
图2为本公开实施例提供的以网络功能节点(NF)为执行主体的会话管理功能实体(SMF)发现方法的流程示意图;
图3为本公开实施例提供的SMF注册的流程示意图;
图4为本公开实施例提供的以组管理功能实体(GMF)为执行主体的SMF发现方法的流程示意图;
图5为本公开实施例提供的以接入和移动性管理功能实体(AMF)为执行主体的SMF发现方法的流程示意图;
图6为本公开实施例提供的AMF重新发起会话创建请求的流程示意图;
图7为本公开实施例提供的GMF和组首选SMF选择功能实体(GPSSF)分别部署在不同NF场景下的SMF发现方法信令流程图;
图8为本公开实施例提供的GMF和GPSSF部署在同一个NF场景下的SMF发现方法信令流程图;
图9为本公开实施例提供的SMF向部署GMF的NF注册的信令流程示意图;
图10至12为本公开实施例提供的NF的结构示意图;
图13和14为本公开实施例提供的NF(部署了GMF的NF)的结构示意图;以及
图15和16为本公开实施例提供的AMF的结构示意图。
具体实施方式
在下文中将参考附图更充分地描述示例实施例,但是所述示例实施例可以以不同形式来体现,且本公开不应当被解释为限于本文阐 述的实施例。提供这些实施例的目的在于使本公开更加透彻和完整,并使本领域技术人员充分理解本公开的范围。
如本文所使用的,术语“和/或”包括一个或多个相关列举条目的任何和所有组合。
本文所使用的术语仅用于描述特定实施例,且不限制本公开。如本文所使用的,单数形式“一个”和“该”也包括复数形式,除非上下文另外清楚指出。还将理解的是,当本说明书中使用术语“包括”和/或“由……制成”时,指定存在特定特征、整体、步骤、操作、元件和/或组件,但不排除存在或可添加一个或多个其他特征、整体、步骤、操作、元件、组件和/或其群组。
本文所述实施例可借助本公开的理想示意图而参考平面图和/或截面图进行描述。因此,可根据制造技术和/或容限来修改示例图示。因此,实施例不限于附图中所示的实施例,而是包括基于制造工艺而形成的配置的修改。因此,附图中例示的区具有示意性属性,并且图中所示区的形状例示了元件的区的具体形状,但并不是限制性的。
除非另外限定,否则本文所用的所有术语(包括技术术语和科学术语)的含义与本领域普通技术人员通常理解的含义相同。还将理解,诸如在常用字典中限定的那些术语应当被解释为具有与其在相关技术以及本公开的背景下的含义一致的含义,且将不解释为具有理想化或过度形式上的含义,除非本文明确如此限定。
同一个5G(The 5th Generation Mobile Communications,第五代移动通信)VN(Virture Network,虚拟网络)组下,用户间的通信数据可以通过A-UPF(Anchor User Plane Function,锚点用户面功能实体)本地路由,或者,通过两个A-UPF间的N19接口进行路由,或者,通过两个A-UPF间的N6接口经过DN(Data Network,数据网络)进行路由,采用何种方式依赖于通信双方的UE(User Equipment,用户设备)与A-UPF的关系。如图1a所示,如果通信双方(UE1和UE2)归属同一个A-UPF,则由A-UPF直接进行本地路由转发数据;如图1b所示,如果通信双方(UE1和UE2)归属不同的A-UPF且A-UPF支持N19接口,则基于N19接口进行数据路由转发; 如图1c所示,如果通信双方(UE1和UE2)归属不同的A-UPF且A-UPF不支持N19接口,则基于N6接口通过DN进行数据路由转发。
从上述5G LAN(Local Area Network,本地局域网)三种通信数据路由架构可以看出,基于A-UPF本地路由无需多余的N19接口或者N6接口进行数据路由转发,因此传输时延最低,同时也可以降低网络负荷。基于此特点,3GPP标准要求同一个5G VN组下的用户,其PDU(Protocol Data Unit,协议数据单元)会话归属到同一个SMF(Session Management Function,会话管理功能实体)下,而针对同一个5G VN组的PDU会话,SMF尽可能选择同一个A-UPF。但这种限制会导致通信可靠性降低,一旦5G VN组归属的SMF故障,将会导致5G VN组内的用户无法通信,因此,为了保证5G LAN网络可靠性,实际部署时将同一个5G VN组归属多个SMF。但是目前的3GPP标准无法保证同一个5G VN组下的PDU会话选择同一个SMF,也就无法利用5G LAN服务下本地路由的优点。
本公开实施例提供一种SMF发现方法,当同一个5G VN组归属多个SMF时,该5G VN组下用户在创建PDU会话时,AMF(Access and Mobility Management Function,接入和移动性管理功能实体)尽可能选择同一个SMF接入,即AMF为同一个5G VN组的PDU会话选择相同的SMF。在本公开实施例中以5G场景中PDU会话创建为例进行说明。
如图2所示,本公开实施例提供的SMF发现方法,应用于会话创建过程,包括步骤11至13。
步骤11,响应于接收到AMF发送的第一请求消息,确定SMF集合,SMF集合中的SMF为接入AMF并请求创建会话的UE所在的VN组所归属的SMF。
一个VN组包括多个UE,同一VN组内的UE之间若要进行PDU会话,需先注册到AMF上,同一VN组内的UE可以注册到同一个AMF,也可以注册到不同的AMF,UE在AMF完成注册之后,才可以创建PDU会话。VN组中的UE在完成AMF注册之后,如果想与该VN组内其他UE进行通信,则向所注册的AMF发送PDU会话创建请求消息,AMF 接收到该PDU会话创建请求消息后,向NF(Network Function,网络功能节点)发送第一请求消息。
在本步骤中,NF接收AMF发送的第一请求消息,根据该第一请求消息确定SMF集合。SMF集合由至少两个SMF组成,这些SMF是接入该AMF并请求创建PDU会话的UE所在的VN组所归属的各SMF。
GMF(Group Management Function,组管理功能实体)用于管理VN组的信息,GPSSF(Group Preferred SMF Selection Function,组首选SMF选择功能实体)用于从VN组所归属的一组SMF(即SMF集合)中,选择首选SMF。需要说明的是,GMF和GPSSF可以分别单独部署在不同的NF上,GMF和GPSSF也可以同时部署在同一个NF上,GMF和GPSSF可以作为现有NF的一个功能组件,也可以作为全新的NF。NF的类型及功能设置不同,对应的第一请求消息也不相同,后续再针对不同的NF类型及功能设置对第一请求消息及处理流程进行详细说明。
步骤12,确定VN组的首选SMF,首选SMF为SMF集合中的一个SMF。
在本步骤中,NF确定VN组的首选SMF,首选SMF是SMF集合中的一个SMF。首选SMF是指AMF优先接入的SMF,针对VN组内的UE发起的PDU会话,AMF优先接入该首选SMF,向该首选SMF发起PDU会话创建请求。需要说明的是,首选SMF一旦确定,通常不会发生变化,除非该首选SMF故障,以保证AMF为同一个5G VN组的PDU会话选择相同的SMF接入。
步骤13,将首选SMF的信息发送给AMF。
在本步骤中,NF的类型及功能设置不同,通过不同的消息将步骤12中确定出的首选SMF的信息发送给AMF,以便AMF接入该首选SMF以创建PDU会话。
本公开实施例提供一种SMF发现方法,应用于会话创建过程,响应于接收到AMF发送的第一请求消息,确定SMF集合,SMF集合中的SMF为接入AMF并请求创建会话的UE所在的VN组所归属的SMF;确定VN组的首选SMF,并将首选SMF的信息发送给AMF,首选SMF为 SMF集合中的一个SMF;本公开实施例提供的SMF发现方法通过从UE所在的VN组所归属的SMF集合中选择一个首选SMF,在创建会话时,AMF接入该首选SMF并发起会话创建请求,这样,无论VN组内的UE接入相同的AMF还是不同的AMF,都能够保证所有AMF尽可能接入同一SMF,即同一个VN组下各UE之间可以直接通过A-UPF进行本地路由转发,在保证网络通信可靠性的前提下,降低通信时延、减少网络负载。
在一些实施方式中,所述SMF发现方法还包括以下步骤:在接收到AMF发送的第一请求消息之后,在确定VN组的首选SMF之前,获取第一请求消息中携带的VN组的信息。
在一些实施方式中,所述确定VN组的首选SMF(即步骤12)包括以下步骤:响应于根据VN组的信息与首选SMF的信息之间的第一映射关系确定出VN组的信息对应的首选SMF,将确定出的首选SMF作为VN组的首选SMF;以及响应于根据VN组的信息与首选SMF的信息之间的第一映射关系未确定出VN组的信息对应的首选SMF,从SMF集合中选择一个SMF作为VN组的首选SMF。
在NF中存储有VN组的信息与首选SMF的信息之间的第一映射关系,一旦可以根据第一映射关系确定出首选SMF,就说明NF曾经为该VN组选择出首选SMF(即已经存在VN组的首选SMF),在创建PDU会话过程中,如果发现在NF中已经存在该VN组的首选SMF,则在步骤12中不用再重新确定首选SMF,而是将之前确定出的首选SMF作为该VN组的首选SMF;如果发现在NF中不存在该VN组的首选SMF,则在步骤12中,确定首选SMF,即从SMF集合中选择一个SMF作为VN组的首选SMF。
在一些实施方式中,所述从SMF集合中选择一个SMF作为VN组的首选SMF包括以下步骤:将SMF集合中预先指定的SMF作为VN组的首选SMF,或者,从SMF集合中随机选择一个SMF作为VN组的首选SMF。也就是说,可以通过静态配置的方式确定首选SMF,也可以通过动态选择的方式确定首选SMF。在静态配置方式中,可以利用配置文件或配置参数预先指定SMF集合中的一个SMF为首选SMF,在动 态选择的方式中,可以从SMF集合中随机选择一个SMF作为首选SMF。
为了保证AMF为同一个5G VN组的PDU会话选择相同的SMF接入,在首次确定出VN组的首选SMF后,需要在NF中记录该首选SMF的信息。因此,在一些实施方式中,所述SMF发现方法还包括以下步骤:在从SMF集合中选择一个SMF作为VN组的首选SMF之后,建立VN组的信息与首选SMF的信息之间的第一映射关系。通过建立VN组的信息与首选SMF的信息之间的第一映射关系,可以通过查询该第一映射关系确定NF中是否已经存在VN组对应的首选SMF,如果查询到该第一映射关系,则可以直接获取到首选SMF的信息,如果未查询到该第一映射关系,再为VN组选择一个首选SMF,无需每次都进行首选SMF的选择,简化了NF的处理,并保证了首选SMF不会发生变化。
以下针对NF的类型及功能设置不同,对第一请求消息以及确定SMF集合的过程分别进行说明。
在一些实施方式中,NF中同时部署了GMF和GPSSF,所述第一请求消息为SMF发现请求消息,所述SMF发现方法还包括以下步骤:在接收到AMF发送的第一请求消息之后,获取SMF发现请求消息中携带的VN组的信息。在一些实施方式中,所述确定SMF集合包括:根据VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定VN组的SMF集合。由于GMF中记录有VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,因此,在确定SMF集合过程中,根据该第二映射关系即可确定出VN组对应的所有的SMF的信息,由此得到SMF集合。
在一些实施方式中,SMF发现请求消息中还可以携带以下至少之一:UE的位置信息、DNN(Data Network Name,数据网络名称)、以及网络切片信息。在确定SMF集合时,还可以将VN组的信息结合上述SMF发现请求消息中携带的至少之一的信息相结合作为SMF集合的确定因素。
在NF中同时部署GMF和GPSSF的情况下,在一些实施方式中,所述将首选SMF的信息发送给所述AMF(即步骤13)包括:向AMF发送SMF发现响应消息,SMF发现响应消息携带有首选SMF的信息。 在本步骤中,同时部署了GMF和GPSSF的NF向AMF返回SMF发现响应消息,该SMF发现响应消息中携带有首选SMF的信息。
在一些实施方式中,该SMF发现响应消息中还可以携带SMF集合,这样,若后续AMF向首选SMF发起PDU会话创建请求失败,则AMF可以从SMF集合中选择其他SMF重新发起PDU会话创建请求。
在一些实施方式中,GMF和GPSSF分别部署在不同的NF中,所述第一请求消息为VN组首选SMF选择请求消息,所述确定SMF集合包括以下步骤:获取VN组首选SMF选择请求消息中携带的SMF集合,SMF集合由GMF根据VN组的信息与SMF的信息之间的第二映射关系以及AMF发送的SMF发现请求消息中携带的VN组的信息确定,并发送给AMF。也就是说,在GMF和GPSSF分别部署在不同的NF的场景下,AMF先向部署了GMF的NF(如NF1)发送携带有VN组的信息的SMF发现请求消息,NF1根据VN组的信息与SMF的信息之间的第二映射关系确定该VN组的信息对应的SMF集合,并向AMF返回携带有该SMF集合的SMF发现响应消息。AMF向部署了GPSSF的NF(如NF2)发送携带该SMF集合的VN组首选SMF选择请求消息,NF2直接从VN组首选SMF选择请求消息中获取SMF集合。
在GMF和GPSSF分别部署在不同的NF的场景下,在一些实施方式中,所述将首选SMF的信息发送给所述AMF(即步骤13)包括:向AMF发送携带有首选SMF的信息的VN组首选SMF选择响应消息。在本步骤中,部署了GPSSF的NF2向AMF返回VN组首选SMF选择响应消息,该VN组首选SMF选择响应消息中携带有首选SMF的信息。
在一些实施方式中,所述SMF发现方法还包括建立VN组的信息与SMF的信息之间的第二映射关系的步骤,该第二映射关系是在SMF注册时建立的,以下结合图3,对VN组的信息与SMF的信息之间的第二映射关系的建立过程进行详细说明。
如图3所示,建立VN组的信息与SMF的信息之间的第二映射关系包括步骤21和22。
步骤21,响应于接收到SMF发送的SMF注册请求消息,获取SMF注册请求消息中携带的VN组的信息。
在本步骤中,SMF通过向部署了GMF的NF(可以是单独部署GMF的NF,也可以是同时部署GMF和GPSSF的NF)发送SMF注册请求消息,以实现SMF注册,该SMF注册请求消息中携带有该SMF对应的VN组的信息。
步骤22,建立VN组的信息与SMF的信息之间的第二映射关系。
在本步骤中,针对当前注册的SMF,部署了GMF的NF建立VN组的信息与SMF的信息之间的第二映射关系,并将该第二映射关系在本地存储。需要说明的是,每个SMF都要向部署了GMF的NF注册,因此,部署了GMF的NF可以建立并存储各个SMF的信息与相应VN组的信息之间的第二映射关系,这样,后续在确定SMF集合时,根据VN组的信息和该第二映射关系就可以直接找到该VN组的所有SMF的信息,由此得到SMF集合。
在一些实施方式中,所述SMF发现方法还可以包括以下步骤:在建立VN组的信息与SMF的信息之间的第二映射关系(即步骤22)之后,向SMF返回注册响应消息。
本公开实施例还提供一种SMF发现方法,如图4所示,所述SMF发现方法包括步骤31至33。
步骤31,响应于接收到AMF发送的SMF发现请求消息,获取SMF发现请求消息中携带的VN组的信息。
在本步骤中,部署了GMF的NF接收AMF发送的SMF发现请求消息,获取SMF发现请求消息中的VN组的信息。
步骤32,根据VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定VN组的SMF集合。
由于部署了GMF的NF中记录有VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,因此,在本步骤中,根据该第二映射关系即可确定出VN组对应的所有的SMF的信息,由此得到SMF集合。
步骤33,向AMF发送携带有SMF集合的SMF发现响应消息,以供AMF发起首选SMF选择请求。
本公开实施例提供的SMF发现方法,应用于会话创建过程,响应 于接收到AMF发送的SMF发现请求消息,获取SMF发现请求消息中携带的虚拟网络VN组的信息;根据VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定VN组的SMF集合;向AMF发送携带有SMF集合的SMF发现响应消息,以供AMF发起首选SMF选择请求。本公开实施例提供的SMF发现方法通过从UE所在的VN组所归属的SMF集合中选择一个首选SMF,在创建会话时,AMF接入该首选SMF并发起会话创建请求,这样,无论VN组内的UE接入相同的AMF还是不同的AMF,都能够保证所有AMF尽可能接入同一SMF,即同一个VN组下各UE之间可以直接通过A-UPF进行本地路由转发,在保证网络通信可靠性的前提下,降低通信时延、减少网络负载。
在一些实施方式中,所述SMF发现方法还包括建立VN组的信息与SMF的信息之间的第二映射关系的步骤,该第二映射关系是在SMF注册时建立的,如图3所示,建立VN组的信息与SMF的信息之间的第二映射关系包括以下步骤21和22。
步骤21,响应于接收到SMF发送的SMF注册请求消息,获取SMF注册请求消息中携带的VN组的信息。
在本步骤中,SMF通过向部署了GMF的NF(可以是单独部署GMF的NF,也可以是同时部署GMF和GPSSF的NF)发送SMF注册请求消息,以实现SMF注册,该SMF注册请求消息中携带有该SMF对应的VN组的信息。
步骤22,建立VN组的信息与SMF的信息之间的第二映射关系。
在本步骤中,针对当前注册的SMF,部署了GMF的NF建立VN组的信息与SMF的信息之间的第二映射关系,并将该第二映射关系在本地存储。需要说明的是,每个SMF都要向部署了GMF的NF注册,因此,部署了GMF的NF可以建立并存储各个SMF的信息与相应VN组的信息之间的第二映射关系,这样,后续在确定SMF集合时,根据VN组的信息和该第二映射关系就可以直接找到该VN组的所有SMF的信息,由此得到SMF集合。
在一些实施方式中,所述SMF发现方法还可以包括以下步骤:在建立VN组的信息与SMF的信息之间的第二映射关系(即步骤22) 之后,向SMF返回注册响应消息。
本公开实施例还提供一种SMF发现方法,如图5所示,所述SMF发现方法包括步骤41至43。
步骤41,响应于接收到UE发送的会话创建请求消息,向NF发送第一请求消息,第一请求消息配置为指示NF确定UE所在的VN组的首选SMF,首选SMF为SMF集合中的一个SMF,SMF集合中的SMF为VN组所归属的SMF。
一个VN组包括多个UE,同一VN组内的UE之间若要进行PDU会话,需先注册到AMF上,同一VN组内的UE可以注册到同一个AMF,也可以注册到不同的AMF,UE在AMF完成注册之后,才可以创建PDU会话。VN组中的UE在完成AMF注册之后,如果想与该VN组内其他UE进行通信,则向所注册的AMF发送PDU会话创建请求消息,AMF接收到该PDU会话创建请求消息后,向NF发送第一请求消息,以使NF确定UE所在的VN组的首选SMF,首选SMF为SMF集合中的一个SMF,SMF集合中的SMF为VN组所归属的SMF。
NF的类型及功能设置不同,第一请求消息也不相同,后续再针对不同的NF类型及功能设置对第一请求消息及处理流程进行详细说明。
步骤42,接收NF发送的首选SMF的信息。
在本步骤中,NF的类型及功能设置不同,则AMF通过不同的消息接收相应类型及功能设置的NF发送的首选SMF的信息。
步骤43,向首选SMF的信息对应的首选SMF发送会话创建请求消息。
本公开实施例提供的SMF发现方法,应用于会话创建过程,响应于接收到UE发送的会话创建请求消息,向NF发送第一请求消息,第一请求消息配置为指示NF确定UE所在的VN组的首选SMF,首选SMF为SMF集合中的一个SMF,SMF集合中的SMF为VN组所归属的SMF;接收NF发送的首选SMF的信息,并向首选SMF的信息对应的首选SMF发送会话创建请求消息;本公开实施例提供的SMF发现方法通过从UE所在的VN组所归属的SMF集合中选择一个首选SMF,在创建会话 时,AMF接入该首选SMF并发起会话创建请求,这样,无论VN组内的UE接入相同的AMF还是不同的AMF,都能够保证所有AMF尽可能接入同一SMF,即同一个VN组下各UE之间可以直接通过A-UPF进行本地路由转发,在保证网络通信可靠性的前提下,降低通信时延、减少网络负载。
在一些实施方式中,所述SMF发现方法还包括以下步骤:在向首选SMF的信息对应的首选SMF发送会话创建请求消息(即步骤43)之前,获取SMF集合。
在一些实施方式中,如图6所示,在向首选SMF的信息对应的SMF发送会话创建请求消息(即步骤43)之后,所述SMF发现方法还包括以下步骤44和45。
步骤44,响应于接收到首选SMF发送的会话创建请求失败消息,从SMF集合中选择除首选SMF之外的其他SMF。
若首选SMF创建PDU会话失败,则向AMF返回PDU会话创建请求失败消息,AMF接收到首选SMF发送的PDU会话创建请求失败消息后,可以根据本地策略从SMF集合中选择另一个SMF(即替补SMF),向该替补SMF发起PDU会话创建请求。本地策略可以是预先指定替补SMF,也可以是随机选择替补SMF,需要说明的是,本地策略还可以用于定义在首选SMF创建PDU会话失败后,是否需要选择替补SMF。
步骤45,向选择出的其他SMF发送会话创建请求消息。
在一些实施方式中,NF中同时部署了GMF和GPSSF,所述第一请求消息为SMF发现请求消息,该SMF发现请求消息携带有UE所在的VN组的信息,所述接收NF发送的首选SMF的信息(即步骤42)、以及,获取SMF集合包括以下步骤:接收NF发送的SMF发现响应消息,获取SMF发现响应消息中携带的首选SMF的信息和SMF集合,SMF集合由NF根据VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系确定。NF中的GMF记录有VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,因此,在确定SMF集合过程中,NF中的GMF根据该第二映射关系即可确定出VN组对应的所有的SMF的信息,由此得到SMF集合。
在一些实施方式中,GMF和GPSSF分别部署在不同的NF中,即NF包括第一NF(NF1)和第二NF(NF2),第一NF为部署了GMF的NF1,第二NF为部署了GPSSF的NF2。所述第一请求消息为VN组首选SMF选择请求消息,所述SMF发现方法还包括以下步骤:在向NF发送第一请求消息(步骤41)之前,向第一NF发送携带有VN组的信息的SMF发现请求消息,SMF发现请求消息配置为指示第一NF确定SMF集合;以及接收第一NF发送的SMF发现响应消息,获取SMF发现响应消息中携带的SMF集合。
在一些实施方式中,所述向NF发送第一请求消息(即步骤41)包括:向第二NF发送携带有SMF集合的VN组首选SMF选择请求消息,VN组首选SMF选择请求消息配置为指示第二NF确定VN组的首选SMF。
也就是说,在GMF和GPSSF分别部署在不同的NF的场景下,AMF先向部署了GMF的第一NF(NF1)发送携带有VN组的信息的SMF发现请求消息,第一NF(NF1)根据VN组的信息与SMF的信息之间的第二映射关系确定该VN组的信息对应的SMF集合,并向AMF返回携带有该SMF集合的SMF发现响应消息。AMF向部署了GPSSF的第二NF(NF2)发送携带该SMF集合的VN组首选SMF选择请求消息,第二NF(NF2)获取VN组首选SMF选择请求消息中的SMF集合,确定VN组的首选SMF。
在一些实施方式中,VN组首选SMF选择请求消息中还携带有VN组的信息,以便第二NF(NF2)基于该VN组的信息判断是否曾经为相应的VN组确定过首选SMF。
为清楚描述本公开实施例的方案,以下结合实例,对GMF和GPSSF分别部署在不同NF中的场景下的SMF发现过程进行详细说明,在本实例中,NF1为单独部署GMF的NF,NF2为单独部署GPSSF的NF,UE所在的5G VN组对应的SMF集合包括SMF1和SMF2。如图7所示,SMF发现流程包括步骤S1至S9。
步骤S1,UE注册到5G核心网,即UE注册到AMF。
步骤S2,UE向AMF发送PDU会话创建请求消息,以触发5G VN组下的PDU会话建立。
步骤S3,AMF向NF1(即单独部署GMF的NF)发送携带有5G VN组的信息的SMF发现请求消息,以启动为该5G VN组的PDU会话选择SMF的流程。
步骤S4,NF1(即单独部署GMF的NF)查询VN组的信息与SMF的信息之间的第二映射关系,得到该5G VN组对应的SMF集合(SMF1、SMF2),并向AMF返回携带有SMF集合的SMF发现响应消息。
步骤S5,AMF向NF2(即单独部署GPSSF的NF)发送VN组首选SMF选择请求消息,以发起5G VN组首选SMF选择请求,该VN组首选SMF选择请求消息中携带有5G VN组的信息和SMF集合。
步骤S6,NF2(即单独部署GPSSF的NF)根据VN组的信息与首选SMF的信息之间的第一映射关系判断是否首次为该5G VN组选择首选SMF,若NF2是首次为该5G VN组选择首选SMF,则通过静态配置或者动态选择方式,从SMF集合中选择SMF1作为5G VN组的首选SMF,并在本地建立5G VN组的信息与SMF1的信息之间的第一映射关系;若NF2之前已经为该5G VN组选择过首选SMF,获取之前为该5G VN组选择的首选SMF(即SMF1)的信息;NF2向AMF发送携带有首选SMF(即SMF1)的信息的VN组首选SMF选择响应消息。
步骤S7,AMF向首选SMF1(即5G VN组的首选SMF)发送PDU会话创建请求消息。
步骤S8,SMF1向AMF返回PDU会话创建响应消息。
步骤S9,若SMF1返回PDU会话创建请求失败消息,AMF根据本地策略决策是否需要继续选择5G VN组中的其他SMF继续发起PDU会话创建流程;若需要继续选择5G VN组中的其他SMF继续发起PDU会话创建流程,则从SMF集合中选择其他SMF接入,并向该其他SMF发送PDU会话创建请求消息;若不需要继续选择5G VN组中的其他SMF继续发起PDU会话创建流程,则PDU会话被拒绝。
以下结合实例,对GMF和GPSSF部署在同一个NF场景下的SMF发现过程进行详细说明,在本实例中,NF为部署了GMF和GPSSF的NF,UE所在的5G VN组对应的SMF集合包括SMF1和SMF2。如图8所示,SMF发现流程包括步骤S81至S89。
步骤S81,UE注册到5G核心网,即UE注册到AMF。
步骤S82,UE向AMF发送PDU会话创建请求消息,以触发5G VN组下的PDU会话建立。
步骤S83,AMF向NF(即部署了GMF和GPSSF的NF)发送携带有5G VN组的信息的SMF发现请求消息,以启动为该5G VN组的PDU会话选择SMF的流程。
步骤S84,NF(即部署了GMF和GPSSF的NF)查询VN组的信息与SMF的信息之间的第二映射关系,得到该5G VN组对应的SMF集合(SMF1、SMF2)。
步骤S85,NF(即部署了GMF和GPSSF的NF)根据VN组的信息与首选SMF的信息之间的第一映射关系判断是否首次为该5G VN组选择首选SMF,若NF是首次为该5G VN组选择首选SMF,则通过静态配置或者动态选择方式,从SMF集合中选择SMF1作为5G VN组的首选SMF,并在本地建立5G VN组的信息与SMF1的信息之间的第一映射关系;若NF之前已经为该5G VN组选择过首选SMF,获取之前为该5G VN组选择的首选SMF(SMF1)的信息。
步骤S86,NF(即部署了GMF和GPSSF的NF)向AMF发送携带有SMF集合和SMF1的信息的SMF发现响应消息。
步骤S87,AMF向SMF1(即首选SMF)发送PDU会话创建请求消息。
步骤S88,SMF1向AMF返回PDU会话创建响应消息。
步骤S89,若SMF1返回PDU会话创建请求失败消息,AMF根据本地策略决策是否需要继续选择5G VN组中的其他SMF继续发起PDU会话创建流程;若需要继续选择5G VN组中的其他SMF继续发起PDU会话创建流程,则从SMF集合中选择其他SMF接入,并向该其他SMF发送PDU会话创建请求消息;若不需要继续选择5G VN组中的其他SMF继续发起PDU会话创建流程,则PDU会话被拒绝。
以下结合实例,对SMF向部署有GMF的NF注册的过程进行详细说明。图9为SMF向部署了GMF的NF(NF1)注册的信令流程图。如图9所示,SMF向NF1注册包括步骤S10至S30。
步骤S10,SMF向NF1发送注册请求消息,该注册请求消息携带有5G VN组的信息。
步骤S20,NF1建立5G VN组的信息与SMF的信息之间的第二映射关系。
步骤S30,NF1向SMF返回注册响应消息。
本公开实施例提供的SMF发现方法引入了GMF逻辑实体,负责5G VN组信息管理;该逻辑实体可以独立作为NF,或者作为现有NF的组件;还引入GPSSF逻辑实体,负责从5G VN组所归属的一组SMF中,选择首选SMF,该逻辑实体可以独立作为NF,或者作为现有NF的组件,也可以与GMF合并为同一个NF。
基于相同的技术构思,本公开实施例还提供一种网络功能节点,如图10所示,包括第一处理模块101、SMF发现模块102和发送模块103。
第一处理模块101配置为响应于接收到接入和移动性管理功能实体(AMF)发送的第一请求消息,确定会话管理功能实体(SMF)集合,所述SMF集合中的SMF为接入所述AMF并请求创建会话的用户设备所在的虚拟网络(VN)组所归属的SMF。
SMF发现模块102配置为确定所述VN组的首选SMF,所述首选SMF为所述SMF集合中的一个SMF。
发送模块103配置为将所述首选SMF的信息发送给所述AMF。
在一些实施方式中,第一处理模块101还配置为在接收到AMF发送的第一请求消息之后,在确定所述VN组的首选SMF之前,获取所述第一请求消息中携带的VN组的信息。
在一些实施方式中,SMF发现模块102配置为响应于根据VN组的信息与首选SMF的信息之间的第一映射关系确定出所述VN组的信息对应的首选SMF,将所述确定出的首选SMF作为所述VN组的首选SMF。
在一些实施方式中,SMF发现模块102还配置为响应于根据VN组的信息与首选SMF的信息之间的第一映射关系未确定出所述VN组的信息对应的首选SMF,从所述SMF集合中选择一个SMF作为所述VN 组的首选SMF。
在一些实施方式中,SMF发现模块102配置为将所述SMF集合中预先指定的SMF作为所述VN组的首选SMF,或者,从所述SMF集合中随机选择一个SMF作为所述VN组的首选SMF。
在一些实施方式中,如图11所示,所述网络功能节点还包括第二处理模块104,第二处理模块104配置为在SMF发现模块102从所述SMF集合中选择一个SMF作为所述VN组的首选SMF之后,建立所述VN组的信息与所述首选SMF的信息之间的第一映射关系。
在一些实施方式中,第一请求消息为SMF发现请求消息,第一处理模块101还配置为获取所述SMF发现请求消息中携带的VN组的信息;以及,根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定所述VN组的SMF集合。
在一些实施方式中,发送模块103配置为向所述AMF发送SMF发现响应消息,所述SMF发现响应消息携带有所述首选SMF的信息。
在一些实施方式中,第一请求消息为VN组首选SMF选择请求消息,第一处理模块101配置为获取所述VN组首选SMF选择请求消息中携带的SMF集合,所述SMF集合由组管理功能实体GMF根据VN组的信息与SMF的信息之间的第二映射关系和所述AMF发送的SMF发现请求消息中携带的VN组的信息确定,并发送给所述AMF。
在一些实施方式中,发送模块103配置为向所述AMF发送携带有所述首选SMF的信息的VN组首选SMF选择响应消息。
在一些实施方式中,如图12所示,所述网络功能节点还包括注册模块105,注册模块105配置为响应于接收到SMF发送的SMF注册请求消息,获取所述SMF注册请求消息中携带的VN组的信息;以及建立所述VN组的信息与所述SMF的信息之间的第二映射关系。
本公开实施例还提供一种网络功能节点,如图13所示,包括接收模块201、获取模块202、处理模块203和发送模块204。
接收模块201配置为接收接入和移动性管理功能实体(AMF)发送的会话管理功能实体(SMF)发现请求消息。
获取模块202配置为获取所述SMF发现请求消息中携带的虚拟 网络VN组的信息。
处理模块203配置为根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定所述VN组的SMF集合。
发送模块204配置为向所述AMF发送携带有所述SMF集合的SMF发现响应消息,以供所述AMF发起首选SMF选择请求。
在一些实施方式中,如图14所示,所述网络功能节点还包括注册模块205,注册模块205配置为响应于接收到SMF发送的SMF注册请求消息,获取所述SMF注册请求消息中携带的VN组的信息;以及建立所述VN组的信息与所述SMF的信息之间的第二映射关系。
本公开实施例还提供一种接入和移动性管理功能实体,如图15所示,包括SMF发现模块301,SMF发现模块301配置为响应于接收到用户设备(UE)发送的会话创建请求消息,向网络功能节点(NF)发送第一请求消息,所述第一请求消息配置为指示所述NF确定所述UE所在的虚拟网络(VN)组的首选SMF,所述首选SMF为SMF集合中的一个SMF,所述SMF集合中的SMF为所述VN组所归属的SMF;以及接收所述NF发送的首选SMF的信息,并向所述首选SMF的信息对应的首选SMF发送会话创建请求消息。
在一些实施方式中,如图16所示,所述接入和移动性管理功能实体还包括获取模块302,获取模块302配置为在向所述首选SMF的信息对应的首选SMF发送会话创建请求消息之前,获取所述SMF集合。
所述接入和移动性管理功能实体还包括SMF重发现模块303,SMF重发现模块303配置为在SMF发现模块301向所述首选SMF的信息对应的首选SMF发送会话创建请求消息之后,响应于接收到所述首选SMF发送的会话创建请求失败消息,从所述SMF集合中选择除所述首选SMF之外的其他SMF,并向所述选择出的其他SMF发送会话创建请求消息。
在一些实施方式中,第一请求消息为SMF发现请求消息,SMF发现请求消息携带有所述UE所在的VN组的信息,获取模块302配置为获取NF发送的SMF发现响应消息中携带的首选SMF的信息和SMF集合,所述SMF集合由所述NF根据所述VN组的信息以及VN组的信 息与SMF的信息之间的第二映射关系确定。
在一些实施方式中,所述NF包括第一NF和第二NF,所述第一请求消息为VN组首选SMF选择请求消息,获取模块302还配置为向第一NF发送携带有VN组的信息的SMF发现请求消息,所述SMF发现请求消息配置为指示所述第一NF确定SMF集合;接收所述第一NF发送的SMF发现响应消息,获取所述SMF发现响应消息中携带的SMF集合。
SMF发现模块301配置为向第二NF发送携带有所述SMF集合的VN组首选SMF选择请求消息,所述VN组首选SMF选择请求消息用于指示所述第二NF确定所述VN组的首选SMF。
在一些实施方式中,所述VN组首选SMF选择请求消息中还携带有所述VN组的信息。
本公开实施例还提供了一种电子设备,该电子设备包括:至少一个处理器以及存储装置;存储装置上存储有至少一个计算机程序,当上述至少一个计算机程序被上述至少一个处理器执行时,使得上述至少一个处理器实现如前所述的SMF发现方法。
本公开实施例还提供了一种计算机可读存储介质,其上存储有计算机程序,该计算机程序被处理器执行时实现如前所述的SMF发现方法。
本领域普通技术人员可以理解,上文中所公开方法中的全部或某些步骤、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中,在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分;例如,一个物理组件可以具有多个功能,或者一个功能或步骤可以由若干物理组件合作执行。某些物理组件或所有物理组件可以被实施为由处理器(如中央处理器、数字信号处理器或微处理器)执行的软件,或者被实施为硬件,或者被实施为集成电路,如专用集成电路。这样的软件可以分布在计算机可读介质上,计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的,术语计算机存储介质包括在用于存储信息(诸如计算机可 读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外,本领域普通技术人员公知的是,通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据,并且可包括任何信息递送介质。
本文已经公开了示例实施例,并且虽然采用了具体术语,但它们仅用于并仅应当被解释为一般说明性含义,并且不用于限制的目的。在一些实例中,对本领域技术人员显而易见的是,除非另外明确指出,否则与特定实施例相结合描述的特征、特性和/或元素可单独使用,或可与结合其他实施例描述的特征、特性和/或元件组合使用。因此,本领域技术人员将理解,在不脱离由所附的权利要求阐明的本公开的范围的情况下,可进行各种形式和细节上的改变。

Claims (22)

  1. 一种会话管理功能实体(SMF)发现方法,应用于会话创建过程,包括:
    响应于接收到接入和移动性管理功能实体(AMF)发送的第一请求消息,确定会话管理功能实体(SMF)集合,所述SMF集合中的SMF为接入所述AMF并请求创建会话的用户设备所在的虚拟网络(VN)组所归属的SMF;
    确定所述VN组的首选SMF,所述首选SMF为所述SMF集合中的一个SMF;以及
    将所述首选SMF的信息发送给所述AMF。
  2. 如权利要求1所述的方法,还包括:在所述接收到AMF发送的第一请求消息之后,在所述确定所述VN组的首选SMF之前,获取所述第一请求消息中携带的VN组的信息;
    所述确定所述VN组的首选SMF包括:
    响应于根据VN组的信息与首选SMF的信息之间的第一映射关系确定出所述VN组的信息对应的首选SMF,将所述确定出的首选SMF作为所述VN组的首选SMF。
  3. 如权利要求2所述的方法,其中,所述确定所述VN组的首选SMF还包括:
    响应于根据VN组的信息与首选SMF的信息之间的第一映射关系未确定出所述VN组的信息对应的首选SMF,从所述SMF集合中选择一个SMF作为所述VN组的首选SMF。
  4. 如权利要求3所述的方法,其中,所述从所述SMF集合中选择一个SMF作为所述VN组的首选SMF包括:
    将所述SMF集合中预先指定的SMF作为所述VN组的首选SMF,或者,从所述SMF集合中随机选择一个SMF作为所述VN组的首选SMF。
  5. 如权利要求3所述的方法,还包括:
    在所述从所述SMF集合中选择一个SMF作为所述VN组的首选SMF之后,建立所述VN组的信息与所述首选SMF的信息之间的第一映射关系。
  6. 如权利要求1至5中任一项所述的方法,其中,所述第一请求消息为SMF发现请求消息,所述SMF发现方法还包括:在所述接收到AMF发送的第一请求消息之后,获取所述SMF发现请求消息中携带的VN组的信息;
    所述确定SMF集合包括:根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定所述VN组的SMF集合。
  7. 如权利要求6所述的方法,其中,所述将所述首选SMF的信息发送给所述AMF包括:
    向所述AMF发送SMF发现响应消息,所述SMF发现响应消息携带有所述首选SMF的信息。
  8. 如权利要求1至5中任一项所述的方法,其中,所述第一请求消息为VN组首选SMF选择请求消息,所述确定SMF集合包括:
    获取所述VN组首选SMF选择请求消息中携带的SMF集合,所述SMF集合由组管理功能实体(GMF)根据VN组的信息与SMF的信息之间的第二映射关系和所述AMF发送的SMF发现请求消息中携带的VN组的信息确定,并发送给所述AMF。
  9. 如权利要求8所述的方法,其中,所述将所述首选SMF的信息发送给所述AMF包括:
    向所述AMF发送携带有所述首选SMF的信息的VN组首选SMF选择响应消息。
  10. 如权利要求1至5中任一项所述的方法,还包括:
    响应于接收到SMF发送的SMF注册请求消息,获取所述SMF注册请求消息中携带的VN组的信息;以及
    建立所述VN组的信息与所述SMF的信息之间的第二映射关系。
  11. 一种SMF发现方法,应用于会话创建过程,包括:
    响应于接收到接入和移动性管理功能实体(AMF)发送的会话管理功能实体(SMF)发现请求消息,获取所述SMF发现请求消息中携带的虚拟网络(VN)组的信息;
    根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定所述VN组的SMF集合;以及
    向所述AMF发送携带有所述SMF集合的SMF发现响应消息,以供所述AMF发起首选SMF选择请求。
  12. 如权利要求11所述的方法,还包括:
    响应于接收到SMF发送的SMF注册请求消息,获取所述SMF注册请求消息中携带的VN组的信息;以及
    建立所述VN组的信息与所述SMF的信息之间的第二映射关系。
  13. 一种SMF发现方法,包括:
    响应于接收到用户设备(UE)发送的会话创建请求消息,向网络功能节点(NF)发送第一请求消息,所述第一请求消息配置为指示所述NF确定所述UE所在的虚拟网络(VN)组的首选SMF,所述首选SMF为SMF集合中的一个SMF,所述SMF集合中的SMF为所述VN组所归属的SMF;
    接收所述NF发送的首选SMF的信息;以及
    向所述首选SMF的信息对应的首选SMF发送会话创建请求消息。
  14. 如权利要求13所述的方法,还包括:在所述向所述首选SMF的信息对应的首选SMF发送会话创建请求消息之前,获取所述SMF 集合;
    在所述向所述首选SMF的信息对应的首选SMF发送会话创建请求消息之后,响应于接收到所述首选SMF发送的会话创建请求失败消息,从所述SMF集合中选择除所述首选SMF之外的其他SMF,并向所述选择出的其他SMF发送会话创建请求消息。
  15. 如权利要求14所述的方法,其中,所述第一请求消息为SMF发现请求消息,所述SMF发现请求消息携带有所述UE所在的VN组的信息,所述接收所述NF发送的首选SMF的信息、以及所述获取所述SMF集合包括:
    接收所述NF发送的SMF发现响应消息,获取所述SMF发现响应消息中携带的首选SMF的信息和SMF集合,所述SMF集合由所述NF根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系确定。
  16. 如权利要求13或14所述的方法,其中,所述NF包括第一NF和第二NF,所述第一请求消息为VN组首选SMF选择请求消息,所述SMF发现方法还包括:
    在所述向NF发送第一请求消息之前,向所述第一NF发送携带有VN组的信息的SMF发现请求消息,所述SMF发现请求消息配置为指示所述第一NF确定SMF集合;以及
    接收所述第一NF发送的SMF发现响应消息,获取所述SMF发现响应消息中携带的SMF集合;
    所述向NF发送第一请求消息包括:
    向所述第二NF发送携带有所述SMF集合的VN组首选SMF选择请求消息,所述VN组首选SMF选择请求消息配置为指示所述第二NF确定所述VN组的首选SMF。
  17. 如权利要求16所述的方法,其中,所述VN组首选SMF选择请求消息中还携带有所述VN组的信息。
  18. 一种网络功能节点,包括第一处理模块、SMF发现模块和发送模块,所述第一处理模块配置为响应于接收到接入和移动性管理功能实体(AMF)发送的第一请求消息,确定会话管理功能实体(SMF)集合,所述SMF集合中的SMF为接入所述AMF并请求创建会话的用户设备所在的虚拟网络(VN)组所归属的SMF;
    所述SMF发现模块配置为确定所述VN组的首选SMF,所述首选SMF为所述SMF集合中的一个SMF;以及
    所述发送模块配置为将所述首选SMF的信息发送给所述AMF。
  19. 一种网络功能节点,包括接收模块、获取模块、处理模块和发送模块,所述接收模块配置为接收接入和移动性管理功能实体(AMF)发送的会话管理功能实体(SMF)发现请求消息;
    所述获取模块配置为获取所述SMF发现请求消息中携带的虚拟网络(VN)组的信息;
    所述处理模块配置为根据所述VN组的信息以及VN组的信息与SMF的信息之间的第二映射关系,确定所述VN组的SMF集合;以及
    所述发送模块配置为向所述AMF发送携带有所述SMF集合的SMF发现响应消息,以供所述AMF发起首选SMF选择请求。
  20. 一种接入和移动性管理功能实体,包括SMF发现模块,所述SMF发现模块配置为响应于接收到用户设备(UE)发送的会话创建请求消息,向网络功能节点(NF)发送第一请求消息,所述第一请求消息配置为指示所述NF确定所述UE所在的虚拟网络(VN)组的首选SMF,所述首选SMF为SMF集合中的一个SMF,所述SMF集合中的SMF为所述VN组所归属的SMF;以及接收所述NF发送的首选SMF的信息,并向所述首选SMF的信息对应的首选SMF发送会话创建请求消息。
  21. 一种电子设备,包括:
    至少一个处理器;以及
    存储装置,其上存储有至少一个计算机程序;
    当所述至少一个计算机程序被所述至少一个处理器执行时,使得所述至少一个处理器实现如权利要求1至17中任一项所述的SMF发现方法。
  22. 一种计算机可读存储介质,其上存储有计算机程序,所述计算机程序被处理器执行时实现如权利要求1至17中任一项所述的SMF发现方法。
PCT/CN2022/103315 2021-07-06 2022-07-01 会话管理功能实体发现方法、网络功能节点、接入和移动性管理功能实体、电子设备和计算机可读存储介质 WO2023280066A1 (zh)

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