WO2021109824A1 - 会话创建方法和装置、会话创建的控制方法和装置、会话创建系统、网元及存储介质 - Google Patents

会话创建方法和装置、会话创建的控制方法和装置、会话创建系统、网元及存储介质 Download PDF

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Publication number
WO2021109824A1
WO2021109824A1 PCT/CN2020/128308 CN2020128308W WO2021109824A1 WO 2021109824 A1 WO2021109824 A1 WO 2021109824A1 CN 2020128308 W CN2020128308 W CN 2020128308W WO 2021109824 A1 WO2021109824 A1 WO 2021109824A1
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session
pdu session
node
smf
local
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PCT/CN2020/128308
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English (en)
French (fr)
Inventor
李志军
朱进国
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中兴通讯股份有限公司
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Publication of WO2021109824A1 publication Critical patent/WO2021109824A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/141—Setup of application sessions

Definitions

  • This application relates to a wireless communication network, for example, to a method and device for creating a session, a method and device for controlling a session, a system for creating a session, a network element, and a storage medium.
  • the Fifth Generation (5G) mobile communication system architecture consists of multiple network functions (Network Functions, NF). Among them, the Session Management Function (SMF) is used to manage the user’s Packet Data Unit (Packet Data Unit). , PDU) session, and formulating packet inspection and forwarding rules for the User Plane Function (UPF).
  • SMF Session Management Function
  • PDU Packet Data Unit
  • UPF User Plane Function
  • I-SMF Intermediate-SMF
  • the N4 interface is used for communication, and this interface uses the Packet Forwarding Control Protocol (PFCP).
  • PFCP Packet Forwarding Control Protocol
  • the I-SMF When the I-SMF is inserted and the local offload is required, the I-SMF needs to provide the offload node, local UPF and other information to the SMF, and the SMF will formulate the N4 rules for the offload node and the local UPF node, and the N4 rules will be formulated separately Encapsulated in different PFCP session control messages and sent to I-SMF, I-SMF replaces the important information in the PFCP session control message as needed, and uses the PFCP session messages after the replacement information corresponding to the offload node and the local UPF to control the offload respectively Only the node and the local UPF can complete the session creation.
  • the session creation process is cumbersome, highly complex, and low in operating efficiency.
  • This application provides a session creation method and device, a session creation control method and device, a session creation system, a network element, and a storage medium, so as to reduce the complexity of session creation and improve the efficiency of session creation.
  • This application provides a session creation method, which is applied to the intermediate session management function I-SMF, including:
  • the embodiment of the present application also provides a method for controlling session creation, which is applied to the session management function SMF, including:
  • the embodiment of the present application also provides a session creation system, including: SMF, I-SMF, offload node, and local PDU session anchor;
  • the I-SMF is configured to send a PDU session update request to the SMF, and the PDU session update request carries deployment information of the offload node and the local PDU session anchor;
  • the SMF is configured to feed back the session control rules of the offload node and the local PDU session anchor to the I-SMF according to the deployment information;
  • the I-SMF is further configured to create a session with the offload node and the local PDU session anchor according to the session control rule.
  • the embodiment of the present application also provides a session creation device, including:
  • the request sending module is configured to send a packet data unit PDU session update request to the session management function SMF, where the PDU session update request carries deployment information of the shunt node and the local PDU session anchor;
  • a rule receiving module configured to receive the session control rule fed back by the SMF according to the deployment information
  • the session creation module is configured to create a session with the shunt node and the local PDU session anchor according to the session control rule.
  • the embodiment of the present application also provides a device for controlling session creation, including:
  • the request receiving module is configured to receive the PDU session update request sent by the I-SMF, and the PDU session update request carries the deployment information of the shunt node and the local PDU session anchor;
  • the rule sending module is configured to feed back the session control rules of the offload node and the local PDU session anchor to the I-SMF according to the deployment information.
  • the embodiment of the present application also provides a network element, including:
  • One or more processors are One or more processors;
  • Storage device for storing one or more programs
  • the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors implement the foregoing session creation method or session creation control method.
  • the embodiments of the present application also provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned session creation method or the session creation control method is implemented.
  • FIG. 1 is a schematic diagram of a distributed architecture of SMF and UPF under mobility management provided by an embodiment
  • FIG. 2 is a schematic diagram of inserting offload nodes and local PDU session anchor points under mobility management according to an embodiment
  • FIG. 3 is a flowchart of a method for creating a session according to an embodiment
  • FIG. 4 is a flowchart of a method for controlling session creation according to an embodiment
  • FIG. 5 is a schematic structural diagram of a session creation system provided by an embodiment
  • FIG. 6 is a schematic diagram of an implementation of session creation provided by an embodiment
  • FIG. 7 is a schematic structural diagram of a session creation apparatus provided by an embodiment
  • FIG. 8 is a schematic structural diagram of a device for controlling session creation according to an embodiment
  • Fig. 9 is a schematic diagram of the hardware structure of a network element provided by an embodiment.
  • the 5G system includes 5G Radio Access Network (RAN) and 5G Core (5G Core, 5GC) subsystems.
  • 5G RAN mainly includes a new generation of radio base stations (New Radio, NR);
  • 5GC mainly includes unified data management functions (Unified Data Management, UDM), access management functions (Access Management Function, AMF), SMF, UPF, policy control functions ( Policy Control Function (PCF), Application Function (Application Function, AF), etc.
  • UDM Unified Data Management
  • AMF Access Management Function
  • SMF Serving Mobility Management Function
  • PCF Policy Control Function
  • Application Function Application Function
  • UDM is the permanent storage location of user subscription data, located in the home network of the user subscription;
  • AMF is used to manage the user's access to the network and is responsible for the terminal To the network's Non-Access Stratum (NAS) signaling management, user mobility management, etc.;
  • SMF is used to manage the user's PDU session, Quality of Service (QoS) flow, and package for UPF Detection and forwarding rules, etc.;
  • UPF is used for routing, forwarding, and usage reporting of IP data and non-IP data;
  • PCF is used to provide various levels of policy rules for AMF and SMF.
  • FIG. 1 is a schematic diagram of a distributed architecture of SMF and UPF under mobility management provided by an embodiment.
  • the user terminal User Equipment, UE
  • the N4 interface is implemented between SMF and UPF through PFCP.
  • SMF uses PFCP and UPF to establish a PFCP session.
  • the SMF sends a request to UPF.
  • Various N4 rules are provided to control UPF to realize functions such as detection, QoS control, forwarding, shunting, and traffic reporting of IP data packets.
  • a PDU session contains multiple UPFs
  • at least one of the UPFs serves as the PDU Session Anchor (PSA), that is, as the UPF that provides the N6 interface to connect to the external data network (Data Network, DN) .
  • PSA PDU Session Anchor
  • Fig. 2 is a schematic diagram of inserting offload nodes and local PDU session anchor points under mobility management provided by an embodiment.
  • I-SMF intermediate SMF
  • I- UPF intermediate UPF
  • I- UPF intermediate-UPF
  • local UPF Local UPF
  • uplink offload nodes represented as ULCL/BP
  • Uplink offload nodes refer to ULCL (used for IPv4 uplink classification, Uplink Classifier) or BP (Branching Point for IPv6).
  • PSA1 is the UPF selected when the UE requests to establish a PDU session
  • PSA2 is the UPF for local offloading of service data flow, that is, local PDU.
  • Session anchor (Local PSA).
  • SMF and PSA1 establish a PFCP session and directly control PSA1; I-SMF, ULCL/BP, and Local PSA establish PFCP sessions respectively, and I-SMF controls ULCL/BP and Local PSA through two PFCP sessions, respectively.
  • I-SMF provides ULCL/BP and Local PSA information to SMF.
  • SMF formulates control rules for ULCL/BP and Local PSA respectively and encapsulates them in different PFCP session messages and sends them to I-SMF so that I-SMF can be sent to the I-SMF separately.
  • I-SMF After I-SMF receives the PFCP session message formulated by SMF, it replaces the important information in it as needed, and uses the PFCP session message after the replacement information corresponding to ULCL/BP and Local PSA to control separately ULCL/BP and Local PSA.
  • ULCL/BP and Local PSA selected by I-SMF has a certain association relationship.
  • SMF is the ULCL/BP and Local PSA that respectively generate PFCP session messages. This method increases the complexity of the system and wastes resources; in addition, I-SMF controls ULCL/BP and Local PSA through two independent PFCP sessions, and will forward internally between ULCL/BP and Local PSA (even without forwarding) , It becomes the external forwarding on the N9 interface, which makes the system implementation more complicated and greatly reduces the operating efficiency.
  • the embodiment of the application provides a session creation method.
  • the PDU session update request sent by the I-SMF carries the deployment information of the offload node and the local PDU session anchor, so that the SMF generates only one PFCP session message based on the deployment information and feeds back one
  • This kind of session control rule is used to uniformly control ULCL/BP and Local PSA, thereby reducing the complexity of the system and improving operating efficiency.
  • Fig. 3 is a flowchart of a session creation method provided by an embodiment.
  • the method of this embodiment can be applied to I-SMF.
  • the method provided in this embodiment includes steps 110-130.
  • a packet data unit PDU session update request is sent to the session management function SMF, where the PDU session update request carries deployment information of the offload node and the local PDU session anchor.
  • step 120 a session control rule fed back by the SMF according to the deployment information is received.
  • step 130 a session with the offload node and the local PDU session anchor is created according to the session control rule.
  • the distributed architecture of the 5G system can refer to FIG. 2.
  • the system allocates SMF and PSA1 for the UE and establishes a PDU connection.
  • PSA1 is the anchor point of the PDU session.
  • AMF inserts an I-SMF for the PDU session; when the I-SMF judges that PSA1 cannot continue to serve the UE, the I-SMF inserts an I-UPF for the PDU session.
  • the I-SMF sends a list of data network access identifiers (Date Network Aceess Identifier, DNAI) it supports to the SMF, and the SMF returns the list of DNAIs related to the PDU session that can be locally shunted to the I -SMF, a DNAI is used to identify the entry of a data network that supports a specific application.
  • DNAI Data Network Aceess Identifier
  • the SMF sends an indication to the I-SMF, indicating that the PDU session supports Multi-homing.
  • I-SMF selects the local PDU session anchor point and establishes an N4 session with it. For example, if the UE moves into the area identified by the offloadable DNAI, and the I-SMF determines that the data stream needs to be locally offloaded, the I-SMF selects a Local PSA for data offloading.
  • PSA2 is used as the local PDU Take the session anchor as an example.
  • I-SMF allocates a new IPv6 prefix for local data offloading, or I-SMF instructs PSA2 to allocate an IPv6 prefix for data local offloading.
  • I-UPF is used as an offload node as an example for description.
  • the I-SMF needs to select a new I-UPF As a shunt node; if PSA2 can act as a shunt node, the I-SMF does not need to reselect a new UPF as the shunt node ULCL/BP.
  • the I-SMF sends a PDU Session Update Request (PDU Session Update Request) to the SMF.
  • PDU Session Update Request carries the deployment information of the shunt node and the local PDU session anchor.
  • the deployment information indicates that the shunt node and the local PDU session anchor are associated or deployed in one, so that the SMF can connect the shunt node and the local
  • the PDU session anchor establishes a unified rule and establishes a PFCP session.
  • the PDU session update request also carries the following information: the indication information of inserting ULCL/BP, indicating that there is the insertion of the shunt node ULCL/BP; the list of DNAI supported by PSA2; the downlink tunnel information of ULCL/BP (DownLink Tunnel Info); SMF may determine the policy control and charging (Policy Control and Charging, PCC) policies based on the DNAI list supported by PSA2.
  • the indication information of inserting ULCL/BP indicating that there is the insertion of the shunt node ULCL/BP
  • the list of DNAI supported by PSA2 the downlink tunnel information of ULCL/BP (DownLink Tunnel Info)
  • SMF may determine the policy control and charging (Policy Control and Charging, PCC) policies based on the DNAI list supported by PSA2.
  • the PDU session update request also carries the IPv6 prefix allocated to PSA2.
  • the SMF When the PDU session update request carries the downlink tunnel information, the SMF also updates the Core Network (CN) tunnel information (CN Tunnel Info) to the PSA1. After the PSA1 receives the downlink data, it can be sent to ULCL/BP.
  • CN Core Network
  • the I-SMF receives the PDU Session Update Response (PDU Session Update Response) message returned by the SMF, which carries session control rules.
  • PDU Session Update Response PDU Session Update Response
  • the PDU session update response message also carries the following information: associated DNAI; an indication message that DNAI changes are not allowed; an indication message that local PSA changes are not allowed.
  • the PDU session update response message also carries the uplink tunnel information.
  • the I-SMF creates a session with the offload node and the local PDU session anchor according to the session control rules received from the SMF.
  • the PDU session update request sent by the I-SMF carries the deployment information of the offload node and the local PDU session anchor. According to the deployment information, the SMF can uniformly formulate the session control rules for the offload node and the local PDU session anchor. Reduce the complexity of the system and improve operating efficiency.
  • the deployment information includes at least one of the following: information indicating that the offload node and the local PDU session anchor point are integrated; the node identification of the offload node and the node identification of the local PDU session anchor; the network function instantiation of the offload node Identifies the network function instantiation identifier of the anchor point of the local PDU session.
  • the deployment information includes combined indication information (Combined Indication) indicating that the offload node and the local PDU session anchor point are unified, which is used to indicate that ULCL/BP and Local PSA (for example, PSA2 in FIG. 2) are physically unified; It can also include the node ID of the offload node and the node ID of the local PDU session anchor. When the node ID of the offload node and the node ID of the local PDU session anchor are the same, it can be used to indicate the ULCL/BP and Local PSA corresponding to the node ID. It is deployed in one; it can also include the network function instantiation identification of the offload node and the network function instantiation identification of the local PDU session anchor.
  • Combined Indication combined indication information
  • the network function instantiation identification of the offload node and the network function instantiation of the local PDU session anchor When the identifier is the same, it can be used to indicate that the ULCL/BP and Local PSA corresponding to the network function instantiation identifier are deployed in one, so that the SMF will uniformly formulate and feed back the session control rules for the ULCL/BP and Local PSA deployed in one. According to the session control rules received from SMF, SMF creates a session for the ULCL/BP and Local PSA nodes deployed in one, thereby reducing the complexity of the system and improving operating efficiency.
  • FIG. 4 is a flowchart of a method for controlling session creation provided in an embodiment. As shown in FIG. 4, the method provided in this embodiment includes step 210 and step 220.
  • step 210 a PDU session update request sent by an I-SMF is received, where the PDU session update request carries deployment information of the offload node and the local PDU session anchor point.
  • step 220 the session control rules of the offload node and the local PDU session anchor are fed back to the I-SMF according to the deployment information.
  • the SMF after the SMF receives the deployment information, it uniformly formulates and feeds back the session control rules for ULCL/BP and Local PSA, so that the I-SMF will respond to the unified deployment of ULCL/BP and ULCL/BP according to the session control rules received from the SMF.
  • the local PSA node creates a session to achieve control over the creation of the session, reduce the complexity of the system, and improve operating efficiency.
  • the deployment information includes at least one of the following: the unification indication information of the offload node and the local PDU session anchor; the node identification of the offload node and the node identification of the local PDU session anchor; the network function of the offload node The instantiation identifier and the network function instantiation identifier of the local PDU session anchor.
  • the method further includes: determining, according to the deployment information, that the deployment type of the offload node and the local PDU session anchor is a unified deployment; and formulating a unified session control for the offload node and the local PDU session anchor of the unified deployment Rule, the session control rule is an N4 rule.
  • the SMF is based on the deployment information of the offload node and the local PDU session anchor (for example, according to the indication information of the offload node and the local PDU session anchor point, or the node identifier of the offload node and the node of the local PDU session anchor. Or according to the network function instantiation identifier of the offload node and the network function instantiation identifier of the local PDU session anchor), it can be determined that the deployment type is a unified deployment.
  • the deployment type is a unified deployment.
  • a unified N4 rule is formulated for the shunt node and the local PDU session anchor point, and fed back to the I-SMF through a PFCP session, thereby achieving control over session creation, reducing system complexity, and improving operating efficiency .
  • determining that the deployment type of the offload node and the local PDU session anchor is a unified deployment according to the deployment information includes: the deployment information provided in the I-SMF includes the information about the offload node and the local PDU session anchor.
  • the deployment information provided in the I-SMF includes the node ID of the offload node and the node ID of the local PDU session anchor , And the node ID of the offload node is the same as the node ID of the local PDU session anchor, the deployment type of the offload node and the local PDU session anchor is determined to be a unified deployment; or, the deployment information provided in the I-SMF includes the offload node If the network function instantiation identifier of the network function instantiation identifier and the network function instantiation identifier of the local PDU session anchor point, and the network function instantiation identifier of
  • the SMF is based on the deployment information provided by the I-SMF and includes unification indication information in the deployment information, or when the node identifier of the offload node is the same as the node identifier of the local PDU session anchor, or In the case that the network function instantiation identifier of the offload node and the network function instantiation identity of the local PDU session anchor are the same, it is determined that the deployment type of the offload node and the local PDU session anchor is unified deployment.
  • a unified N4 rule is formulated for the shunt node and the local PDU session anchor point, and fed back to the I-SMF through a PFCP session, thereby achieving control over session creation, reducing system complexity, and improving operating efficiency .
  • Fig. 5 is a schematic structural diagram of a session creation system provided by an embodiment.
  • the system includes: a session management function 310, an intermediate session management function 320, a shunt node 330, and a local PDU session anchor 340; the intermediate session management function 320 sends a PDU session update request to the session management function 310, and the PDU session
  • the update request carries the deployment information of the shunt node 330 and the local PDU session anchor 340; the session management function 310 feeds back the session control rules of the shunt node 330 and the local PDU session anchor 340 to the intermediate session management function 320 according to the deployment information; intermediate session management
  • the function 320 creates a session with the offload node 330 and the local PDU session anchor 340 according to the session control rule.
  • Fig. 6 is a schematic diagram of an implementation of session creation provided by an embodiment. As shown in Figure 6, the process of session creation is as follows:
  • the UE requests the establishment of a PDU session, and the network allocates SMF and UPF (PSA1) for the UE, and establishes a PDU connection.
  • PSA1 is used as the anchor point of the PDU session as an example, and the AMF inserts an I-SMF for the PDU session.
  • I-SMF selects Local PSA (PSA2 is taken as an example in Figure 6), establishes an N4 session with this Local PSA, and selects a UPF as the offload node ULCL/BP, ULCL/BP and Local PSA It is deployed in one.
  • PSA2 is taken as an example in Figure 6
  • I-SMF sends a PDU session update request to SMF.
  • the PDU session update request carries deployment information.
  • the deployment information can be the combined indication information of ULCL/BP and Local PSA; or the node ID of ULCL/BP and the local PDU session The node identifier of the anchor; or the network function instantiation identifier of the ULCL/BP and the network function instantiation identifier of the local PDU session anchor.
  • SMF updates the downlink tunnel information to PSA1, and after receiving the downlink data, PSA1 can send it to ULCL/BP.
  • the SMF returns a PDU session update response message to the I-SMF, and the PDU session update response message includes the N4 rule.
  • the SMF receives the deployment information, if it judges that ULCL/BP and Local PSA are a unified deployment, it will only formulate a set of N4 rules for ULCL/BP and Local PSA. There is no need to formulate separate rules for ULCL/BP and Local PSA. According to the N4 rule, only one PFCP session message is carried for the ULCL/BP and Local PSA nodes deployed in one.
  • the I-SMF sends a PFCP session update request to the ULCL/BP and Local PSA nodes deployed in one to update the N4 rule, and the Local PSA returns a PFCP session update response to the I-SMF.
  • the I-SMF generates the N4 rules sent to ULCL/BP and Local PSA (PSA2) according to the N4 rules received from the SMF. Since the N4 rule received by the I-SMF from the SMF is for the ULCL/BP and Local PSA integrated node, there is no need to perform a merge operation on the independent N4 rule.
  • the SMF updates the IPv6 prefix and routing rules on PSA2 to the UE;
  • the I-SMF sends a PFCP session release request to the original I-UPF (Old I-UPF) to release the I-SMF and Old N4 session between I-UPF.
  • FIG. 7 is a schematic structural diagram of a session creation apparatus provided by an embodiment. As shown in FIG. 7, the session creation apparatus includes: a request sending module 310, a rule receiving module 320, and a session creation module 330.
  • the request sending module 310 is configured to send a packet data unit PDU session update request to the session management function SMF.
  • the PDU session update request carries deployment information of the shunt node and the local PDU session anchor;
  • the rule receiving module 320 is set to receive The SMF is based on the session control rule fed back by the deployment information;
  • the session creation module 330 is configured to create a session with the offload node and the local PDU session anchor according to the session control rule.
  • the session creation apparatus of this embodiment carries the deployment information of the offload node and the local PDU session anchor in the PDU session update request sent by the I-SMF, so that the SMF only needs to feed back one session control rule for unification according to the deployment information. Control ULCL/BP and Local PSA, thereby reducing the complexity of the system and improving operating efficiency.
  • the deployment information includes at least one of the following: information indicating that the offload node and the local PDU session anchor point are integrated; the node identifier of the offload node and the node identifier of the local PDU session anchor point ; The network function instantiation identifier of the offload node and the network function instantiation identifier of the local PDU session anchor.
  • This embodiment provides a session creation device.
  • FIG. 8 is a schematic structural diagram of a device for controlling session creation according to an embodiment.
  • the apparatus for controlling session creation includes: a request receiving module 410 and a rule sending module 420.
  • the request receiving module 410 is configured to receive the PDU session update request sent by the I-SMF; the rule sending module 420 is configured to feed back the session control of the offload node and the local PDU session anchor to the I-SMF according to the deployment information rule.
  • the session creation control device of this embodiment after SMF receives the deployment information, it uniformly formulates and feeds back session control rules for ULCL/BP and Local PSA; the I-SMF is made to target unified deployment based on the session control rules received from SMF The ULCL/BP and Local PSA nodes create sessions, thereby reducing the complexity of the system and improving operating efficiency.
  • the deployment information includes at least one of the following: the unification indication information of the offload node and the local PDU session anchor; the node identifier of the offload node and the node identifier of the local PDU session anchor ; The network function instantiation identifier of the offload node and the network function instantiation identifier of the local PDU session anchor.
  • it further includes: a determination module configured to determine, based on the deployment information, that the deployment type of the shunt node and the local PDU session anchor is a unified deployment; a rule formulation module is configured to determine whether the shunt node and the local PDU session anchor are deployed in one.
  • the local PDU session anchor formulates the session control rule, and the session control rule is the N4 rule.
  • the determination module is configured to determine the offload node when the deployment information provided by the I-SMF includes the unification indication information of the offload node and the local PDU session anchor point
  • the deployment type of the anchor point for the local PDU session is unified deployment; or, the deployment information provided in the I-SMF includes the node identifier of the offload node and the node identifier of the local PDU session anchor, and the offload
  • the deployment information provided by the I-SMF includes The network function instantiation identifier of the offload node and the network function instantiation identifier of the local PDU session anchor point, and the network function instantiation identifier of the offload node is the same as the network function instantiation identifier of the local PDU session anchor In the case of, it is determined that the
  • This embodiment provides a device for controlling session creation.
  • a device for controlling session creation For technical details not described in this embodiment, please refer to the embodiment of the above-mentioned arbitrary session creation control method, and this embodiment has the same technology as the control method for executing session creation. effect.
  • the embodiment of the application also provides a network element.
  • the session creation method may be executed by a session creation device, which may be implemented by software and/or hardware and integrated in the network element (the network element is an I-SMF); or, the The method for controlling session creation may be executed by a control device for session creation, and the device for controlling session creation may be implemented in software and/or hardware, and integrated in the network element (the network element is an SMF).
  • Fig. 9 is a schematic diagram of the hardware structure of a network element provided by an embodiment.
  • a network element provided in this embodiment includes: a processor 510 and a storage device 520.
  • one processor 510 is taken as an example.
  • the processor 510 and the storage device 520 in the device may be connected by a bus or other methods. Take the bus connection as an example.
  • the one or more programs are executed by the one or more processors 510, so that the one or more processors implement the session creation method or the session creation control method described in any of the foregoing embodiments.
  • the storage device 520 in the network element is used as a computer-readable storage medium and can be used to store one or more programs.
  • the programs can be software programs, computer-executable programs, and modules, such as the session creation method in the embodiment of the present invention.
  • Corresponding program instructions/modules (for example, the modules in the session creation apparatus shown in FIG. 7 include: a request sending module 310, a rule receiving module 320, and a session creation module 330).
  • the processor 510 executes various functional applications and data processing of the network element by running the software programs, instructions, and modules stored in the storage device 520, that is, implements the session creation method or the session creation control method in the foregoing method embodiment.
  • the storage device 520 mainly includes a storage program area and a storage data area.
  • the storage program area can store an operating system and an application program required by at least one function; the storage data area can store data created according to the use of the device, etc. (as in the above implementation) Example deployment information, session control rules, etc.).
  • the storage device 520 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the storage device 520 may further include memories remotely provided with respect to the processor 510, and these remote memories may be connected to the network element through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • a packet data unit PDU session update request is sent to the session management function SMF, in the PDU session update request Carrying the deployment information of the offload node and the local PDU session anchor; receiving the session control rule fed back by the SMF according to the deployment information; creating a session with the offload node and the local PDU session anchor according to the session control rule.
  • the following operations are implemented: receiving a packet data unit PDU session update request sent by the intermediate session management function I-SMF, so The PDU session update request carries deployment information of the offload node and the local PDU session anchor; and the session control rules of the offload node and the local PDU session anchor are fed back to the I-SMF according to the deployment information.
  • This embodiment provides a network element.
  • this embodiment has the same technical effect as the session creation method or the session creation control method.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute a session creation method or a session creation control method when executed by a computer processor.
  • this application can be implemented by software and general hardware, or can be implemented by hardware.
  • the technical solution of this application can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory ( Random Access Memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including multiple instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute any of the embodiments described in this application method.
  • ROM read-only memory
  • RAM random access memory
  • FLASH flash memory
  • hard disk or optical disk etc.
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read only memory (ROM), random access memory (RAM), optical memory devices and systems (digital multi-function optical discs) (Digital Video Disc, DVD) or Compact Disc (CD)), etc.
  • Computer-readable media may include non-transitory storage media.
  • the data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
  • DSP Digital Signal Processors
  • ASICs application specific integrated circuits
  • FPGA Field Programmable Gate Array
  • processors based on multi-core processor architecture such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.

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Abstract

本申请提供一种会话创建方法和装置、会话创建的控制方法和装置、会话创建系统、网元及存储介质。该会话创建方法包括：向会话管理功能SMF发送分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；接收所述SMF根据所述部署信息反馈的会话控制规则；根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。

Description

会话创建方法和装置、会话创建的控制方法和装置、会话创建系统、网元及存储介质
本申请要求在2019年12月04日提交中国专利局、申请号为201911227426.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信网络，例如涉及一种会话创建方法和装置、会话创建的控制方法和装置、会话创建系统、网元及存储介质。
背景技术
第五代(Fifth Generation，5G)移动通信系统架构由多个网络功能(Network Function，NF)构成，其中，会话管理功能(Session Management Function，SMF)用于管理用户的分组数据单元(Packet Data Unit，PDU)会话、为用户面功能(User Plane Function，UPF)制定包检测和转发规则等。在原有SMF不能提供服务的情况下，需要插入中间SMF(Intermediate-SMF，I-SMF)，并且在业务数据流需要本地分流时，需要插入本地UPF以及分流节点。SMF和UPF之间，采用N4接口进行通讯，该接口使用包前转控制协议(Packet Forwarding Control Protocol，PFCP)。
在插入I-SMF且需要本地分流的情况下，I-SMF需要将分流节点、本地UPF等信息提供给SMF，由SMF对分流节点、本地UPF节点分别制定N4规则，并将制定的N4规则分别封装在不同的PFCP会话控制消息中发送给I-SMF，I-SMF根据需要替换PFCP会话控制消息中的重要信息，使用与分流节点和本地UPF分别对应的替换信息后的PFCP会话消息分别控制分流节点和本地UPF，才能完成会话创建，会话创建过程繁琐、复杂度高、运行效率低。
发明内容
本申请提供一种会话创建方法和装置、会话创建的控制方法和装置、会话创建系统、网元及存储介质，以降低会话创建的复杂度，提高会话创建的效率。
本申请提供了一种会话创建方法，应用于中间会话管理功能I-SMF，包括：
向会话管理功能SMF发送分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
接收所述SMF根据所述部署信息反馈的会话控制规则；
根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。
本申请实施例还提供了一种会话创建的控制方法，应用于会话管理功能SMF，包括：
接收I-SMF发送的PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
根据所述部署信息向所述I-SMF反馈所述分流节点和本地PDU会话锚点的会话控制规则。
本申请实施例还提供了一种会话创建系统，包括：SMF、I-SMF、分流节点和本地PDU会话锚点；
所述I-SMF设置为向所述SMF发送PDU会话更新请求，所述PDU会话更新请求中携带所述分流节点和所述本地PDU会话锚点的部署信息；
所述SMF设置为根据所述部署信息向所述I-SMF反馈所述分流节点和本地PDU会话锚点的会话控制规则；
所述I-SMF还设置为根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。
本申请实施例还提供了一种会话创建装置，包括：
请求发送模块，设置为向会话管理功能SMF发送分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
规则接收模块，设置为接收所述SMF根据所述部署信息反馈的会话控制规则；
会话创建模块，设置为根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。
本申请实施例还提供了一种会话创建的控制装置，包括：
请求接收模块，设置为接收I-SMF发送的PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
规则发送模块，设置为根据所述部署信息向所述I-SMF反馈所述分流节点和本地PDU会话锚点的会话控制规则。
本申请实施例还提供了一种网元，包括：
一个或多个处理器；
存储装置，用于存储一个或多个程序；
当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现上述的会话创建方法或会话创建的控制方法。
本申请实施例还提供了一种计算机可读存储介质，计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时实现上述的会话创建方法或会话创建的控制方法。
附图说明
图1为一实施例提供的移动性管理下的SMF和UPF分布架构的示意图；
图2为一实施例提供的移动性管理下的插入分流节点和本地PDU会话锚点的示意图；
图3为一实施例提供的一种会话创建方法的流程图；
图4为一实施例提供的一种会话创建的控制方法的流程图；
图5为一实施例提供的一种会话创建系统的结构示意图；
图6为一实施例提供的一种会话创建的实现示意图；
图7为一实施例提供的一种会话创建装置的结构示意图；
图8为一实施例提供的一种会话创建的控制装置的结构示意图；
图9为一实施例提供的网元的硬件结构示意图。
具体实施方式
下面结合附图和实施例对本申请进行说明。此处所描述的具体实施例仅仅用于解释本申请，而非对本申请的限定。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
5G系统包括5G无线接入系统(Radio Access Network，RAN)和5G核心网(5G Core，5GC)子系统。5G RAN主要包括新一代无线基站(New Radio，NR)；5GC主要包括统一数据管理功能(Unified Data Management，UDM)、接入管理功能(Access Management Function，AMF)、SMF、UPF、策略控制功能(Policy Control Function，PCF)、应用功能(Application Function，AF)等，UDM是用户签约数据的永久存放地点，位于用户签约的归属网；AMF用于对用户接入到网络的需求进行管理，负责终端到网络的非接入层(Non-Access Stratum，NAS)信令管理、用户移动性管理等；SMF用于管理用户的PDU会话、服务质量(Quality of Service，QoS)流，以及为UPF制定包检测和转发规 则等；UPF用于IP数据、非IP数据的路由、转发和用量上报等；PCF用于为AMF、SMF提供各级别策略规则等。
图1为一实施例提供的移动性管理下的SMF和UPF分布架构的示意图。在5G系统中，用户终端(User Equipment，UE)发起会话请求，SMF和UPF之间通过PFCP实现N4接口，SMF使用PFCP和UPF建立PFCP会话，在PFCP会话建立或变更的情况下，SMF向UPF提供各种N4规则(N4Rules)以控制UPF实现IP数据包的探测、QoS控制、前转、分流以及流量上报等功能。在一个PDU会话中包含多个UPF的情况下，其中至少有一个UPF充当PDU会话锚点(PDU Session Anchor，PSA)，即作为提供N6接口以连接到外部数据网络(Data Network，DN)的UPF。
图2为一实施例提供的移动性管理下的插入分流节点和本地PDU会话锚点的示意图。如图2所示，在UE发生移动的情况下，由于原有的SMF、UPF无法服务新的区域，需要插入中间SMF(表示为I-SMF)、中间UPF(Intermediate-UPF，表示为I-UPF)。在某些业务数据流需要本地分流的情况下，还插入本地UPF(Local UPF)以及上行分流节点(表示为ULCL/BP)，上行分流节点是指ULCL(用于IPv4的上行链路分类，Uplink Classifier)或BP(用于IPv6的分流点，Branching Point)。这种情况下，系统中存在两个PDU会话锚点，分别标记为PSA1和PSA2，PSA1为UE请求建立PDU会话时所选择的UPF，而PSA2是业务数据流实现本地分流的UPF，即本地PDU会话锚点(Local PSA)。在图2中，SMF和PSA1建立PFCP会话，直接控制PSA1；I-SMF和ULCL/BP、Local PSA之间分别建立PFCP会话，I-SMF通过两个PFCP会话分别控制ULCL/BP和Local PSA。
I-SMF将ULCL/BP、Local PSA的信息提供给SMF，SMF为ULCL/BP和Local PSA分别制定控制规则并分别封装在不同的PFCP会话消息中发送给I-SMF，以使I-SMF分别控制ULCL/BP和Local PSA；I-SMF收到SMF制定的PFCP会话消息后，根据需要替换其中的重要信息，并使用与ULCL/BP和Local PSA分别对应的替换信息后的PFCP会话消息分别控制ULCL/BP和Local PSA。在实际应用中，在业务数据流需要分流的情况下，I-SMF所选择的ULCL/BP和Local PSA的部署是具有一定关联关系的，SMF为ULCL/BP和Local PSA分别产生PFCP会话消息的方式增加了系统的复杂度、浪费资源；此外，I-SMF通过两条独立的PFCP会话控制ULCL/BP和Local PSA，会将ULCL/BP和Local PSA之间的内部转发(甚至不需要转发)，变成N9接口上的外部转发，使系统实现更加复杂，也极大降低了运行效率。
本申请实施例提供一种会话创建方法，在I-SMF发送的PDU会话更新请求 中携带分流节点和本地PDU会话锚点的部署信息，以使SMF根据部署信息仅产生一条PFCP会话消息、反馈一种会话控制规则，用于统一控制ULCL/BP和Local PSA，从而降低系统的复杂性，并提高运行效率。
图3为一实施例提供的一种会话创建方法的流程图。本实施例的方法可应用于I-SMF。如图3所示，本实施例提供的方法包括步骤110-130。
在步骤110中，向会话管理功能SMF发送分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息。
在步骤120中，接收所述SMF根据所述部署信息反馈的会话控制规则。
在步骤130中，根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。
本实施例中，5G系统的分布架构可参考图2。UE请求建立PDU会话后，系统为UE分配SMF和PSA1，建立PDU连接，PSA1为PDU会话锚点。在原SMF不能继续服务UE的情况下，AMF为该PDU会话插入I-SMF；在I-SMF判断PSA1也不能继续服务UE的情况下，I-SMF为该PDU会话插入I-UPF。在插入I-SMF的情况下，I-SMF将自身所支持的数据网络访问标识(Date Network Aceess Identifier，DNAI)列表发送给SMF，SMF将该PDU会话相关的可本地分流的DNAI列表返回给I-SMF，一个DNAI用于标识一个支持特定应用的数据网络的入口。此外，根据PDU会话的属性，SMF向I-SMF发送指示，表明该PDU会话支持多归属(Multi-homing)。
为了实现数据本地分流，I-SMF选择本地PDU会话锚点并与其建立N4会话。例如，如果UE移入可分流的DNAI所标识的区域内，I-SMF判断需要对数据流实现数据本地分流，则I-SMF选择一个Local PSA用于做数据分流，本实施例以PSA2作为本地PDU会话锚点为例。根据SMF提供的Multi-homing指示，I-SMF分配新的用于数据本地分流的IPv6前缀(prefix)，或I-SMF指示PSA2来分配用于数据本地分流的IPv6前缀。本实施例以I-UPF作为分流节点为例进行说明。在一些实施例中，如果原来的I-UPF(Old I-UPF)不能服务新的位置区域或不能充当分流节点，并且PSA2也不能充当分流节点，则I-SMF需要选择一个新的I-UPF作为分流节点；如果PSA2能充当分流节点，则I-SMF无需重选新的UPF作为分流节点ULCL/BP。
在步骤110中，I-SMF向SMF发送PDU会话更新请求(PDU Session Update Request)。PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息，例如，所述部署信息指示分流节点和本地PDU会话锚点为关联的或者合一部署的，以使SMF对分流节点和本地PDU会话锚点制定合一的规则并建立一 个PFCP会话。
在一实施例中，PDU会话更新请求中还携带以下信息：插入ULCL/BP的指示信息，表明有分流节点ULCL/BP的插入；PSA2所支持的DNAI列表；ULCL/BP的下行隧道信息(DownLink Tunnel Info)；SMF根据PSA2所支持的DNAI列表可能确定的策略控制和计费(Policy Control and Charging，PCC)策略。
在PDU会话支持Multi-homing的情况下，PDU会话更新请求中还携带分配给PSA2的IPv6prefix。
在PDU会话更新请求中携带下行隧道信息的情况下，SMF还向PSA1更新核心网(Core Network，CN)隧道信息(CN Tunnel Info)，PSA1收到下行数据后，可发往ULCL/BP。
在步骤120中，I-SMF接收SMF返回的PDU会话更新响应(PDU Session Update Response)消息，其中携带会话控制规则。
在一实施例中，PDU会话更新响应消息中还携带以下信息：关联的DNAI；不允许DNAI变化的指示消息；不允许Local PSA变化的指示消息。
在PSA1的上行隧道信息(UpLink Tunnel Info)变化的情况下，PDU会话更新响应消息中还携带上行隧道信息。
在步骤130中，I-SMF根据从SMF收到的会话控制规则，创建与所述分流节点和本地PDU会话锚点的会话。
本实施例中，在I-SMF发送的PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息，SMF根据部署信息可对分流节点和本地PDU会话锚点统一制定会话控制规则，从而降低系统的复杂性，并提高运行效率。
在一实施例中，部署信息包括以下至少之一：分流节点和本地PDU会话锚点合一的指示信息；分流节点的节点标识和本地PDU会话锚点的节点标识；分流节点的网络功能实例化标识和本地PDU会话锚点的网络功能实例化标识。
本实施例中，部署信息包括分流节点和本地PDU会话锚点合一的指示信息(Combined Indication)，用于指示ULCL/BP和Local PSA(例如图2中的PSA2)是物理上合一的；还可以包括分流节点的节点标识和本地PDU会话锚点的节点标识，当分流节点的节点标识和本地PDU会话锚点的节点标识相同时，可用于指示节点标识所对应的ULCL/BP和Local PSA是合一部署的；还可以包括分流节点的网络功能实例化标识和本地PDU会话锚点的网络功能实例化标识，当分流节点的网络功能实例化标识和本地PDU会话锚点的网络功能实例化标识相同时，可用于指示网络功能实例化标识对应的ULCL/BP和Local PSA是合一部署的，从而使SMF针对合一部署的ULCL/BP和Local PSA统一制定并反馈会话 控制规则，I-SMF根据从SMF收到的会话控制规则，对合一部署的ULCL/BP和Local PSA节点创建会话，从而降低系统的复杂性，并提高运行效率。
本申请实施例还提供一种会话创建的控制方法。本实施例的方法可应用于SMF。图4为一实施例提供的一种会话创建的控制方法的流程图，如图4所示，本实施例提供的方法包括步骤210和步骤220。
在步骤210中，接收I-SMF发送的PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息。
在步骤220中，根据所述部署信息向所述I-SMF反馈所述分流节点和本地PDU会话锚点的会话控制规则。
本实施例中，SMF收到部署信息后，为ULCL/BP和Local PSA统一制定并反馈会话控制规则，使I-SMF根据从SMF收到的会话控制规则，针对合一部署的ULCL/BP和Local PSA节点创建会话，实现对会话创建的控制，降低系统的复杂性，并提高运行效率。
在一实施例中，所述部署信息包括以下至少之一：分流节点和本地PDU会话锚点的合一指示信息；分流节点的节点标识和本地PDU会话锚点的节点标识；分流节点的网络功能实例化标识和本地PDU会话锚点的网络功能实例化标识。
在一实施例中，还包括：根据所述部署信息判定分流节点和本地PDU会话锚点的部署类型为合一部署；对合一部署的分流节点和本地PDU会话锚点制定合一的会话控制规则，所述会话控制规则为N4规则。
本实施例中，SMF根据分流节点和本地PDU会话锚点的部署信息(例如根据分流节点和本地PDU会话锚点合一的指示信息，或者根据分流节点的节点标识和本地PDU会话锚点的节点标识，或者根据分流节点的网络功能实例化标识和本地PDU会话锚点的网络功能实例化标识)，可以判定部署类型为合一部署。例如，分流节点和本地PDU会话锚点的节点标识相同，或者分流节点和本地PDU会话锚点的网络功能实例化标识相同，则判定部署类型为合一部署。这种情况下，对分流节点和本地PDU会话锚点制定合一的N4规则，并通过一个PFCP会话反馈给I-SMF，从而实现对会话创建的控制，降低系统的复杂性，并提高运行效率。
在一实施例中，根据所述部署信息判定所述分流节点和本地PDU会话锚点的部署类型为合一部署，包括：在I-SMF提供的部署信息包括分流节点和本地PDU会话锚点的合一指示信息的情况下，判定分流节点和本地PDU会话锚点的部署类型为合一部署；或者，在I-SMF提供的部署信息包括分流节点的节点标 识和本地PDU会话锚点的节点标识，且分流节点的节点标识和本地PDU会话锚地的节点标识相同的情况下，判定分流节点和本地PDU会话锚点的部署类型为合一部署；或者，在I-SMF提供的部署信息包括分流节点的网络功能实例化标识和本地PDU会话锚点的网络功能实例化标识，且分流节点的网络功能实例化标识和本地PDU会话锚地的网络功能实例化标识相同的情况下，判定分流节点和本地PDU会话锚点的部署类型为合一部署。
本实施例中，SMF根据I-SMF提供的部署信息，在部署信息中包括合一指示信息的情况下，或者在分流节点的节点标识和本地PDU会话锚点的节点标识相同的情况下，或者在分流节点的网络功能实例化标识和本地PDU会话锚点的网络功能实例化标识相同的情况下，判定分流节点和本地PDU会话锚点的部署类型为合一部署。这种情况下，对分流节点和本地PDU会话锚点制定合一的N4规则，并通过一个PFCP会话反馈给I-SMF，从而实现对会话创建的控制，降低系统的复杂性，并提高运行效率。
本申请实施例还提供一种会话创建系统。图5为一实施例提供的一种会话创建系统的结构示意图。如图5所示，该系统包括：会话管理功能310、中间会话管理功能320、分流节点330和本地PDU会话锚点340；中间会话管理功能320向会话管理功能310发送PDU会话更新请求，PDU会话更新请求中携带分流节点330和本地PDU会话锚点340的部署信息；会话管理功能310根据部署信息向中间会话管理功能320反馈分流节点330和本地PDU会话锚点340的会话控制规则；中间会话管理功能320根据会话控制规则创建与分流节点330和本地PDU会话锚点340的会话。
图6为一实施例提供的一种会话创建的实现示意图。如图6所示，会话创建的过程如下：
S1.UE请求建立PDU会话，网络为UE分配SMF和UPF(PSA1)，建立PDU连接。本实施例以PSA1作为PDU会话锚点为例，AMF为该PDU会话插入I-SMF。
S2.为了实现数据本地分流，I-SMF选择Local PSA(图6中以PSA2为例)，并和该Local PSA建立N4会话，并选择一个UPF作为分流节点ULCL/BP，ULCL/BP和Local PSA是合一部署的。
S3.I-SMF向SMF发送PDU会话更新请求，PDU会话更新请求中携带部署信息，部署信息可以为ULCL/BP和Local PSA的合一指示信息；或者为ULCL/BP的节点标识和本地PDU会话锚点的节点标识；或者为ULCL/BP的的网络功能 实例化标识和本地PDU会话锚点的网络功能实例化标识。
S4.如果PDU会话更新请求中携带了ULCL/BP的下行隧道信息，则SMF向PSA1更新下行隧道信息，PSA1收到下行数据后，可发往ULCL/BP。
S5.SMF向I-SMF返回PDU会话更新响应消息，PDU会话更新响应消息中包括N4规则。此过程中，SMF收到部署信息后，若判断ULCL/BP和Local PSA为合一部署，则仅为ULCL/BP和Local PSA制定一套N4规则，无需为ULCL/BP、Local PSA分别制定单独的N4规则，且对合一部署的ULCL/BP和Local PSA节点仅携带一条PFCP会话消息。
S6.I-SMF向合一部署的ULCL/BP和Local PSA节点发送PFCP会话更新请求，以更新N4规则，Local PSA向I-SMF返回PFCP会话更新响应。此步骤中，I-SMF根据从SMF收到的N4规则，生成发往ULCL/BP和Local PSA(PSA2)的N4规则。由于I-SMF从SMF收到的N4规则是针对ULCL/BP和Local PSA合一节点的，所以无需对独立的N4规则执行合并操作。
S7.如果PDU会话支持IPv6Multi-homing，则SMF向UE更新PSA2上的IPv6prefix以及路由规则；
S8.如果在S2中选择分流节点ULCL/BP的过程中重选了I-UPF，则I-SMF向原先的I-UPF(Old I-UPF)发送PFCP会话释放请求，以释放I-SMF和Old I-UPF之间的N4会话。
本申请实施例还提供一种会话创建装置。图7为一实施例提供的一种会话创建装置的结构示意图。如图7所示，所述会话创建装置包括：请求发送模块310、规则接收模块320和会话创建模块330。
请求发送模块310，设置为向会话管理功能SMF发送分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；规则接收模块320，设置为接收所述SMF根据所述部署信息反馈的会话控制规则；会话创建模块330，设置为根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。
本实施例的会话创建装置，通过在I-SMF发送的PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息，以使SMF根据部署信息仅需反馈一种会话控制规则用于统一控制ULCL/BP和Local PSA，从而降低系统的复杂性，并提高运行效率。
在一实施例中，所述部署信息包括以下至少之一：所述分流节点和本地PDU会话锚点合一的指示信息；所述分流节点的节点标识和所述本地PDU会话锚点 的节点标识；所述分流节点的网络功能实例化标识和所述本地PDU会话锚点的网络功能实例化标识。
本实施例提供一种会话创建装置，未在本实施例中描述的技术细节可参见上述任意会话创建方法的实施例，并且本实施例具备与执行会话创建方法相同的技术效果。
本申请实施例还提供一种会话创建的控制装置。图8为一实施例提供的一种会话创建的控制装置的结构示意图。如图8所示，所述会话创建的控制装置包括：请求接收模块410和规则发送模块420。
请求接收模块410，设置为接收I-SMF发送的PDU会话更新请求；规则发送模块420，设置为根据所述部署信息向所述I-SMF反馈所述分流节点和本地PDU会话锚点的会话控制规则。
本实施例的会话创建的控制装置，SMF收到部署信息后，为ULCL/BP和Local PSA统一制定并反馈会话控制规则；使I-SMF根据从SMF收到的会话控制规则，针对合一部署的ULCL/BP和Local PSA节点创建会话，从而降低系统的复杂性，并提高运行效率。
在一实施例中，所述部署信息包括以下至少之一：所述分流节点和本地PDU会话锚点的合一指示信息；所述分流节点的节点标识和所述本地PDU会话锚点的节点标识；所述分流节点的网络功能实例化标识和所述本地PDU会话锚点的网络功能实例化标识。
在一实施例中，还包括：判定模块，设置为根据所述部署信息判定所述分流节点和本地PDU会话锚点的部署类型为合一部署；规则制定模块，设置为对所述分流节点和本地PDU会话锚点制定所述会话控制规则，所述会话控制规则为N4规则。
在一实施例中，所述判定模块，是设置为：在所述I-SMF提供的部署信息包括所述分流节点和本地PDU会话锚点的合一指示信息的情况下，判定所述分流节点和本地PDU会话锚点的部署类型为合一部署；或者，在所述I-SMF提供的部署信息包括所述分流节点的节点标识和所述本地PDU会话锚点的节点标识，且所述分流节点的节点标识和所述本地PDU会话锚地的节点标识相同的情况下，判定所述分流节点和本地PDU会话锚点的部署类型为合一部署；或在所述I-SMF提供的部署信息包括所述分流节点的网络功能实例化标识和所述本地PDU会话锚点的网络功能实例化标识，且所述分流节点的网络功能实例化标识和所述本地PDU会话锚地的网络功能实例化标识相同的情况下，判定所述分流 节点和本地PDU会话锚点的部署类型为合一部署。
本实施例提供一种会话创建的控制装置，未在本实施例中描述的技术细节可参见上述任意会话创建的控制方法的实施例，并且本实施例具备与执行会话创建的控制方法相同的技术效果。
本申请实施例还提供一种网元。所述会话创建方法可以由会话创建装置执行，该会话创建装置可以通过软件和/或硬件的方式实现，并集成在所述网元(所述网元为I-SMF)中；或者，所述会话创建的控制方法可以由会话创建的控制装置执行，该会话创建的控制装置可以通过软件和/或硬件的方式实现，并集成在所述网元(所述网元为SMF)中。
图9为一实施例提供的网元的硬件结构示意图。如图9所示，本实施例提供的一种网元，包括：处理器510和存储装置520。该网元中的处理器可以是一个或多个，图9中以一个处理器510为例，所述设备中的处理器510和存储装置520可以通过总线或其他方式连接，图9中以通过总线连接为例。
所述一个或多个程序被所述一个或多个处理器510执行，使得所述一个或多个处理器实现上述任一实施例所述的会话创建方法或会话创建的控制方法。
该网元中的存储装置520作为一种计算机可读存储介质，可用于存储一个或多个程序，所述程序可以是软件程序、计算机可执行程序以及模块，如本发明实施例中会话创建方法对应的程序指令/模块(例如，附图7所示的会话创建装置中的模块，包括：请求发送模块310、规则接收模块320和会话创建模块330)。处理器510通过运行存储在存储装置520中的软件程序、指令以及模块，从而执行网元的各种功能应用以及数据处理，即实现上述方法实施例中的会话创建方法或会话创建的控制方法。
存储装置520主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据设备的使用所创建的数据等(如上述实施例中的部署信息、会话控制规则等)。此外，存储装置520可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储装置520可进一步包括相对于处理器510远程设置的存储器，这些远程存储器可以通过网络连接至网元。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
当上述网元中所包括一个或者多个程序被所述一个或者多个处理器510执行时，实现如下操作：向会话管理功能SMF发送分组数据单元PDU会话更新 请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；接收所述SMF根据所述部署信息反馈的会话控制规则；根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。
或者，当上述网元中所包括一个或者多个程序被所述一个或者多个处理器510执行时，实现如下操作：接收中间会话管理功能I-SMF发送的分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；根据所述部署信息向所述I-SMF反馈所述分流节点和本地PDU会话锚点的会话控制规则。
本实施例提供一种网元，未在本实施例中描述的技术细节可参见上述任意实施例，并且本实施例具备与执行会话创建方法或会话创建的控制方法相同的技术效果。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种会话创建方法或会话创建的控制方法。
通过以上关于实施方式的描述，所属领域的技术人员可以了解到，本申请可借助软件及通用硬件来实现，也可以通过硬件实现。本申请的技术方案可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如计算机的软盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、闪存(FLASH)、硬盘或光盘等，包括多个指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请任意实施例所述的方法。
以上所述，仅为本申请的示例性实施例而已，并非用于限定本申请的保护范围。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(ROM)、随机访问存储器(RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc，DVD)或光盘(Compact Disc，CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、可编程逻辑器件(Field Programmable Gate Array，FPGA)以及基于多核处理器架构的处理器。

Claims (13)

  1. 一种会话创建方法，应用于中间会话管理功能I-SMF，包括：
    向会话管理功能SMF发送分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
    接收所述SMF根据所述部署信息反馈的会话控制规则；
    根据所述会话控制规则创建与所述分流节点和所述本地PDU会话锚点的会话。
  2. 根据权利要求1所述的方法，其中，所述部署信息包括以下至少之一：所述分流节点和本地PDU会话锚点合一的指示信息；
    所述分流节点的节点标识和所述本地PDU会话锚点的节点标识；
    所述分流节点的网络功能实例化标识和所述本地PDU会话锚点的网络功能实例化标识。
  3. 一种会话创建的控制方法，应用于会话管理功能SMF，包括：
    接收中间会话管理功能I-SMF发送的分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
    根据所述部署信息向所述I-SMF反馈所述分流节点和所述本地PDU会话锚点的会话控制规则。
  4. 根据权利要求3所述的方法，其中，所述部署信息包括以下至少之一：
    所述分流节点和本地PDU会话锚点的合一指示信息；
    所述分流节点的节点标识和所述本地PDU会话锚点的节点标识；
    所述分流节点的网络功能实例化标识和所述本地PDU会话锚点的网络功能实例化标识。
  5. 根据权利要求3所述的方法，还包括：
    根据所述部署信息判定所述分流节点和所述本地PDU会话锚点的部署类型为合一部署；
    对所述合一部署的分流节点和本地PDU会话锚点制定合一的会话控制规则，所述会话控制规则为N4规则。
  6. 根据权利要求5所述的方法，其中，所述根据所述部署信息判定所述分流节点和本地PDU会话锚点的部署类型为合一部署，包括：
    在所述I-SMF提供的部署信息包括所述分流节点和所述本地PDU会话锚点的合一指示信息情况下，判定所述分流节点和所述本地PDU会话锚点的部署类 型为合一部署；或者，
    在所述I-SMF提供的部署信息包括所述分流节点的节点标识和所述本地PDU会话锚点的节点标识，且所述分流节点的节点标识和所述本地PDU会话锚地的节点标识相同的情况下，判定所述分流节点和本地PDU会话锚点的部署类型为合一部署；或
    在所述I-SMF提供的部署信息包括所述分流节点的网络功能实例化标识和所述本地PDU会话锚点的网络功能实例化标识，且所述分流节点的网络功能实例化标识和所述本地PDU会话锚地的网络功能实例化标识相同的情况下，判定所述分流节点和本地PDU会话锚点的部署类型为合一部署。
  7. 一种会话创建系统，包括：会话管理功能SMF、中间会话管理功能I-SMF、分流节点和本地分组数据单元PDU会话锚点；
    所述I-SMF设置为向所述SMF发送PDU会话更新请求，所述PDU会话更新请求中携带所述分流节点和所述本地PDU会话锚点的部署信息；
    所述SMF设置为根据所述部署信息向所述I-SMF反馈所述分流节点和所述本地PDU会话锚点的会话控制规则；
    所述I-SMF还设置为根据所述会话控制规则创建与所述分流节点和所述本地PDU会话锚点的会话。
  8. 根据权利要求7所述的系统，其中，所述部署信息包括以下至少之一：
    所述分流节点和所述本地PDU会话锚点的合一指示信息；
    所述分流节点的节点标识和所述本地PDU会话锚点的节点标识；
    所述分流节点的网络功能实例化标识和所述本地PDU会话锚点的网络功能实例化标识。
  9. 根据权利要求7所述的系统，其中，所述SMF还设置为：
    根据所述部署信息判定所述分流节点和所述本地PDU会话锚点的部署类型为合一部署；
    对所述合一部署的分流节点和本地PDU会话锚点制定合一的会话控制规则，所述会话控制规则为N4规则。
  10. 一种会话创建装置，包括：
    请求发送模块，设置为向会话管理功能SMF发送分组数据单元PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
    规则接收模块，设置为接收所述SMF根据所述部署信息反馈的会话控制规则；
    会话创建模块，设置为根据所述会话控制规则创建与所述分流节点和本地PDU会话锚点的会话。
  11. 一种会话创建的控制装置，包括：
    请求接收模块，设置为接收I-SMF发送的PDU会话更新请求，所述PDU会话更新请求中携带分流节点和本地PDU会话锚点的部署信息；
    规则发送模块，设置为根据所述部署信息向所述I-SMF反馈所述分流节点和本地PDU会话锚点的会话控制规则。
  12. 一种网元，包括：
    至少一个处理器；
    存储装置，设置为存储至少一个程序；
    当所述至少一个程序被所述至少一个处理器执行，使得所述至少一个处理器实现如权利要求1-2任一项所述的会话创建方法或如权利要求3-6任一项所述的会话创建的控制方法。
  13. 一种计算机可读存储介质，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1-2任一项所述的会话创建方法或如权利要求3-6任一项所述的会话创建的控制方法。
PCT/CN2020/128308 2019-12-04 2020-11-12 会话创建方法和装置、会话创建的控制方法和装置、会话创建系统、网元及存储介质 WO2021109824A1 (zh)

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