WO2024055813A1 - User plane function (upf) network element deployment method, signaling processing method, and system - Google Patents

User plane function (upf) network element deployment method, signaling processing method, and system Download PDF

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Publication number
WO2024055813A1
WO2024055813A1 PCT/CN2023/113859 CN2023113859W WO2024055813A1 WO 2024055813 A1 WO2024055813 A1 WO 2024055813A1 CN 2023113859 W CN2023113859 W CN 2023113859W WO 2024055813 A1 WO2024055813 A1 WO 2024055813A1
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WIPO (PCT)
Prior art keywords
network element
upf network
edge
session
central
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PCT/CN2023/113859
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French (fr)
Chinese (zh)
Inventor
周爱东
周晟
韩波
徐阳
黄正刚
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中兴通讯股份有限公司
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Publication of WO2024055813A1 publication Critical patent/WO2024055813A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools

Definitions

  • the present disclosure relates to the field of core networks, and specifically to a user plane function UPF network element deployment, signaling processing method and system.
  • the User Plane Function (UPF) in the 5G core network mainly completes the routing and forwarding of user plane data packets, data and service identification, action and policy execution.
  • UPF completes the session, policy, billing, media forwarding and other business capabilities of the 3rd Generation Partner Project (3GPP) standard specification, and at the same time, serves as the connection anchor between 5G networks and multi-access edge computing. Point, all core network data must be forwarded by UPF before it can flow to the external network.
  • 3GPP 3rd Generation Partner Project
  • Figure 1 is a basic network structure diagram based on 5G and UPF network elements. As shown in Figure 1, it is based on the C/U separated architecture of the 5G core network (5G Core, 5GC for short), and the control plane network function (Network Function, NF for short) ) network elements are deployed centrally in the Data Center (DC), and UPF network elements are deployed at the edge of the network.
  • 5G Core 5G Core
  • 5GC 5G Core
  • NF Network Function
  • UPF is one of the most important network elements of the core network and the core function of 5G data processing and forwarding. It must have carrier-grade product quality. Moreover, UPF, as an important network node that promotes the integration of 5G and thousands of industries, is gradually moving from the core network to the campus of industry users. Government and enterprise customers are very interested in the large bandwidth, low latency, high reliability, and high security of applications. need.
  • UPF network elements not only require UPF network elements to meet the features and functions required by the 3GPP architecture, but also meet performance, operation and maintenance, networking and other requirements; especially in edge campus applications, there is an urgent need for a low-cost, rapid deployment , lightweight UPF that facilitates operation and maintenance, and also needs to achieve high-reliability backup and disaster recovery capabilities to meet the unique 5G applications in enterprise campuses.
  • Embodiments of the present disclosure provide a user plane function UPF network element deployment method, signaling processing method, system, storage medium and electronic device, to at least solve the need in related technologies for a lightweight, low-cost, rapid deployment, and convenient operation and maintenance.
  • the problem of magnitude UPF is a problem of magnitude UPF.
  • a user plane function UPF network element deployment method includes: The user plane function UPF network element is decoupled into a central UPF network element and an edge UPF network element; the central UPF network element and the edge UPF network element are deployed separately; an Nx connection is established between the center UPF network element and the edge UPF network element, where, The central UPF network element is used to communicate signaling messages and service messages with edge UPF network elements through Nx connections.
  • a signaling processing method is provided, which is applied to an edge UPF network element.
  • the method includes: receiving session request signaling sent by a Session Management Function (Session Management Function, referred to as SMF) network element; Session request signaling is sent to the central user plane function UPF network element through the Nx connection.
  • SMF Session Management Function
  • the central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the central UPF network element and the edge UPF network element are deployed separately.
  • a signaling processing method is provided, which is applied to a central UPF network element.
  • the method includes: receiving session request signaling sent by an edge UPF network element through an Nx connection, wherein the session request signaling It is received by the edge UPF network element from the session management function SMF network element.
  • the central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the central UPF network element and the edge UPF network element are deployed separately; according to the session request information Determine the IP address and service tunnel resources of the edge UPF network element; send session response signaling to the edge UPF network element through the Nx connection, where the session response signaling contains the IP address and service tunnel resources.
  • a signaling processing system includes: an edge UPF network element, configured to receive session request signaling sent by the session management function SMF network element, and transmit the session request signaling through the Nx connection.
  • the command is sent to the central user plane function UPF network element, receives the session response signaling returned by the central UPF network element after processing the session request signaling through the Nx connection, and forwards the session response signaling to the SMF network element;
  • the central UPF network element uses It receives the session request signaling sent by the edge UPF network element through the Nx connection, determines the IP address and service tunnel resources of the edge UPF network element according to the session request signaling, and sends the session response signaling to the edge UPF network element through the Nx connection, where , the session response signaling contains IP addresses and service tunnel resources; among them, the central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the central UPF network element and the edge UPF network element are deployed separately.
  • a computer-readable storage medium is also provided.
  • a computer program is stored in the storage medium, wherein the computer program executes the steps in any of the above method embodiments when run by a processor.
  • an electronic device including a memory and a processor.
  • a computer program is stored in the memory, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments. .
  • Figure 1 is a basic network structure diagram based on 5G and UPF network elements
  • FIG. 2 is a hardware structural block diagram of the user plane function UPF network element deployment according to an embodiment of the present disclosure
  • Figure 3 is a flow chart of user plane function UPF network element deployment according to an embodiment of the present disclosure
  • Figure 4 is a flow chart of an edge UPF network element signaling processing method in an embodiment of the present disclosure
  • Figure 5 is a flow chart of a central UPF network element signaling processing method in an embodiment of the present disclosure
  • Figure 6 is a network architecture diagram of a user plane function UPF network element in an embodiment of the present disclosure
  • Figure 7 is the Nx signaling message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure
  • Figure 8 is the Nx service message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure
  • Figure 9 is a schematic diagram of the session and business process between edge UPF and center UPF in another embodiment of the present disclosure.
  • Figure 10 is a schematic diagram of the disaster recovery process in an edge UPF abnormal scenario in another embodiment of the present disclosure.
  • Figure 11 is a schematic diagram of the disaster recovery process in the abnormal scenario of central UPF in another embodiment of the present disclosure.
  • Figure 12 is a block diagram of a signaling processing system according to an embodiment of the present disclosure.
  • FIG. 2 is a hardware structural block diagram of the user plane function UPF network element deployment according to an embodiment of the present disclosure.
  • the hardware single board can include one or more (only shown in Figure 2 A) processor 202 (the processor 202 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 204 for storing data, wherein the above-mentioned mobile terminal may also include a processor for communication Functional transmission device 206 and input and output device 208.
  • processor 202 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA
  • a memory 204 for storing data
  • the above-mentioned mobile terminal may also include a processor for communication Functional transmission device 206 and input and output device 208.
  • FIG. 2 is only illustrative, and it does not limit the structure of the above-mentioned mobile terminal.
  • the mobile terminal may also include more or fewer components than shown in FIG. 2 , or have a different configuration than shown in FIG. 2 .
  • the memory 204 can be used to store computer programs, for example, software programs and modules of application software, such as the computer programs corresponding to the user plane function UPF network element deployment in the embodiment of the present disclosure.
  • the processor 202 runs the computer programs stored in the memory 204 , thereby executing various functional applications and load balancing processing, that is, implementing the above method.
  • Memory 204 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory.
  • the memory 204 may further include memory located remotely relative to the processor 202, and these remote memories may be connected to the mobile terminal through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.
  • Transmission device 206 is used to receive or send data via a network.
  • Specific examples of the above-mentioned network may include wireless networks provided by communication providers.
  • the transmission device 206 includes a network adapter (Network Interface Controller, NIC for short), which can be connected to other network devices through a base station to communicate with the Internet.
  • the transmission device 206 may be a radio frequency (Radio Frequency, RF for short) module, which is used to communicate with the Internet wirelessly.
  • NIC Network Interface Controller
  • FIG. 3 is a flow chart of user plane function UPF network element deployment according to an embodiment of the present disclosure. As shown in Figure 3, the process includes the following steps:
  • Step S302 Decouple the user plane function UPF network element into a central UPF network element and an edge UPF network element;
  • Step S304 deploy the central UPF network element and the edge UPF network element separately;
  • Step S306 Establish an Nx connection between the central UPF network element and the edge UPF network element.
  • the central UPF network element is used to communicate signaling messages and service messages with the edge UPF network element through the Nx connection.
  • the deployment method further includes:
  • Step S308 configure the IP address pool of the edge UPF network element through the central UPF network element, where the IP address pool is used to indicate the IP address in the campus network;
  • Step S310 deliver the IP address pool to the edge UPF network element through the Nx connection.
  • the central UPF network element in the above step S306 communicates signaling messages and service messages with the edge UPF network element through the Nx connection, which may specifically include:
  • PFCP Packet Forwarding Control Protocol
  • the service message communication is performed in the Nx connection according to a tunnel protocol, wherein the tunnel protocol includes: User Datagram Protocol (User Datagram Protocol, referred to as UDP), GPRS Tunneling Protocol (GPRS Tunneling Protocol, referred to as GTP) or universal routing Encapsulation (Generic Routing Encapsulation, GRE for short) protocol.
  • UDP User Datagram Protocol
  • GTP GPRS Tunneling Protocol
  • GRE Generic Routing Encapsulation
  • GRE General Packet Radio Service
  • the deployment method further includes:
  • Step S312 deploy at least one backup center UPF network element and at least one backup edge UPF network element;
  • Step S31 establish the Nx connection between the backup center UPF network element and the edge UPF network element;
  • Step S316 Establish the Nx connection between the backup center UPF network element and the central UPF network element, wherein the central UPF network element is used to synchronize the session context to the backup center through the Nx connection.
  • UPF network element
  • Step S318 Establish the Nx connection between the backup edge UPF network element and the central UPF network element, wherein the central UPF network element is also used to synchronize flow context to the backup network element through the Nx connection.
  • Edge UPF network element Establish the Nx connection between the backup edge UPF network element and the central UPF network element, wherein the central UPF network element is also used to synchronize flow context to the backup network element through the Nx connection.
  • Edge UPF network element Establish the Nx connection between the backup edge UPF network element and the central UPF network element, wherein the central UPF network element is also used to synchronize flow context to the backup network element through the Nx connection.
  • Edge UPF network element is also used to synchronize flow context to the backup network element through the Nx connection.
  • the originally complex and expensive UPF network element can be decoupled into a lightweight central UPF network element and an edge UPF network element, thereby reducing the deployment of a single UPF network element. and operation and maintenance costs, improving deployment efficiency; at the same time, through the above steps S312 to step S316, the central UPF network element and the edge UPF network element can be backed up separately, which enhances the reliability and disaster recovery capability of the UPF network element.
  • FIG. 4 is a flow chart of the signaling processing method of edge UPF network elements in the embodiment of the present disclosure, as shown in Figure 4 , the process includes the following steps:
  • Step S402 Receive the session request signaling sent by the session management function SMF network element;
  • Step S404 Send the session request signaling to the central user plane function UPF network element through the Nx connection, where the central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the The central UPF network element and the edge UPF network element are deployed separately;
  • Step S406 Receive the session response signaling returned by the central UPF network element after processing the session request signaling through the Nx connection;
  • Step S408 Forward the session response signaling to the SMF network element.
  • the session request signaling may specifically include: a session creation request, a session change request, or a session release request.
  • the edge UPF can also connect to the 5G core network SMF network element, UPF network element, UE and other I-UPF, ULCL main anchor point UPF, etc. through interfaces such as N3, N4, N6, and N9 to realize campus UPF.
  • Business offloading including UL-CL (Uplink Classifier) uplink offloading, IPv6 multi-homing offloading, Local Area Data Network (LADN) and other 3GPP standardized business processes.
  • UL-CL Uplink Classifier
  • IPv6 multi-homing offloading IPv6 multi-homing offloading
  • LADN Local Area Data Network
  • the method may further include:
  • session response signaling includes: session creation response, session change response or session release response;
  • the session response signaling includes the IP address and service tunnel resources of the edge UPF network element, where the edge UPF The IP address of the network element is allocated by the SMF network element or the central UPF network element, and the service tunnel resource is allocated by the central UPF network element.
  • the method may further include:
  • a flow context request sent by the central UPF network element through the Nx connection where the flow context request includes: a flow context creation request, a flow context change request or a flow context release request;
  • IP address pool Publish, change or delete the routing table of the IP address pool according to the flow context request, where the IP address pool is used to indicate IP addresses in the campus network;
  • a flow context response is sent to the central UPF network element through the Nx connection, where the flow context response includes: a flow context creation response, a flow context change response or a flow context release response.
  • the method further includes:
  • the upstream traffic as second upstream traffic, wherein the second upstream traffic is used for business access to the Internet outside the campus network;
  • the method before sending the service access result to the edge user, the method may further include:
  • the second uplink traffic is sent to the center UPF network element or the core network UPF network element, and the second downlink traffic sent by the center UPF network element or the core network UPF network element is received, wherein the The second downlink traffic is the result of business access to the Internet.
  • the uplink traffic may specifically be service data access requests to the Internet or campus network, and the downlink traffic may be service data access responses returned by websites or service providers.
  • the edge UPF network elements may directly forward uplink traffic within the campus network. traffic, reducing network access delay, and achieving data isolation to ensure the security of network access.
  • the method after sending the uplink traffic to the central UPF network element, the core network UPF network element or the campus network, the method further includes:
  • Policy control and billing are performed based on the traffic statistics information.
  • the method further includes: sending the session request signaling according to the Data Packet Forwarding Control Protocol PFCP protocol, and receiving the session response signaling according to the PFCP protocol; and/or receiving the session response signaling according to the tunneling protocol.
  • PFCP Data Packet Forwarding Control Protocol
  • the tunnel protocol includes: User Datagram Protocol UDP, GPRS Tunnel Protocol GTP or General Routing Encapsulation GRE protocol.
  • the method further includes:
  • the central UPF network element is the main central UPF Network element, the main central UPF network element corresponds to at least one backup central UPF network element;
  • one of the at least one backup central UPF network element is set as the main central UPF network element.
  • the working status of the central UPF network element can be detected through the edge UPF network element, and the working status of the active central UPF network element can also be detected through the backup central UPF network element.
  • the backup center UPF network element and the active center UPF network element can also establish an Nx connection, and perform data backup such as session context through the Nx connection.
  • FIG. 5 is a flow chart of the signaling processing method of the central UPF network element in the embodiment of the present disclosure, as shown in Figure 5 , the process includes the following steps:
  • Step S502 Receive session request signaling sent by the edge UPF network element through the Nx connection, where the session request signaling is received by the edge UPF network element from the session management function SMF network element, and the central UPF network element and The edge UPF network element is obtained by decoupling the UPF network element, and the center UPF network element and the edge UPF network element are deployed separately;
  • Step S504 Determine the IP address and service tunnel resources of the edge UPF network element according to the session request signaling
  • Step S506 Send session response signaling to the edge UPF network element through the Nx connection, where the session response signaling includes the IP address and the service tunnel resource.
  • the central UPF can also interface with the 5G core network SMF network element, the Internet, etc. through N3, N4, N6 and other interfaces, ensuring the realization of 3GPP standardized business processes.
  • step S504 may specifically include:
  • the service tunnel resource is allocated to the edge UPF network element according to the session request signaling.
  • step S506 the method further includes:
  • the flow context request includes: a flow context creation request, a flow context change request or a flow context release request;
  • the edge UPF network element Receives the flow context response sent by the edge UPF network element through the Nx connection, wherein the flow context response is after the edge UPF network element creates, changes or releases the forwarding table or flow table according to the flow context request. , and is sent after publishing, changing or deleting the routing table of the IP address pool.
  • the method after receiving the flow context response sent by the edge UPF network element through the Nx connection, the method further includes:
  • the method further includes:
  • the traffic statistics information reported by the edge UPF network element is received through the Nx connection, where the traffic statistics information is obtained by the edge UPF network element performing traffic statistics based on business access in the campus network and the Internet respectively.
  • the method further includes: receiving the session request signaling according to the Data Packet Forwarding Control Protocol PFCP protocol, and sending the session response signaling according to the PFCP protocol; and/or sending the session response signaling according to the tunnel protocol.
  • PFCP Data Packet Forwarding Control Protocol
  • the tunnel protocol includes: User Datagram Protocol UDP, GPRS Tunnel Protocol GTP or General Routing Encapsulation GRE protocol.
  • the method further includes:
  • edge UPF network element is the main edge UPF network element, and the main edge UPF network element corresponds to at least one backup edge UPF network element;
  • one of the at least one backup edge UPF network element is set as the main edge UPF network element.
  • the working status of the edge UPF network element can also be detected through the SMF network element, and a backup edge UPF network element can be directly designated by the SMF network element as the new active edge UPF network element.
  • edge UPF by backing up the edge UPF network elements, it is possible to ensure that user services and data traffic are not affected as long as there are still normally functioning edge UPF network elements.
  • edge UPF When the edge UPF is abnormal, data can also be restored. Lossless migration and high reliability.
  • Figure 1 is a basic network structure diagram based on 5G and UPF network elements.
  • the central UPF network element and edge UPF network element in the embodiment of the present disclosure are decoupled from a standard UPF network element in Figure 1.
  • the central UPF network element The edge UPF network element is deployed at the location of the session anchor UPF.
  • Figure 6 is a network architecture diagram of a user plane function UPF network element in an embodiment of the present disclosure. As shown in Figure 6, the network architecture includes: multiple lightweight and reliable UPFs and multiple central UPFs.
  • the lightweight and reliable UPF is equivalent to the edge UPF network element in the above embodiment; an Nx connection is established between the edge UPF network element and the central UPF network element, and the edge UPF network element and the central UPF network element are specified in 3GPP. N3, N4, N6, and N9 communicate with other network elements within the core network.
  • the N4 interface is located between the SMF network element and the edge UPF network element or the central UPF network element; the N3 interface is located between the 5G access network and the edge UPF; N6 is a protocol between the internal network side and the external network side.
  • the N6 interface is located between the central UPF network element and the Internet, and between the edge UPF network element and the campus network; the N9 interface is located between the edge UPF network element and other standard UPF network elements.
  • a method for deploying edge UPF network elements and central UPF network elements includes the following steps:
  • Step S1 center UPF and edge UPF are deployed separately;
  • Step S2 the central UPF establishes Nx connection with the edge UPF
  • Step S3 Configure the IP address pool, TEIDU and other information of the edge UPF on the central UPF, and deliver them to the edge UPF through the Nx connection;
  • Step S4 The central UPF delivers the new UPF service configuration to the edge UPF through the Nx connection;
  • Step S5 The signaling messages between the center UPF and the edge UPF are communicated using the PFCP protocol;
  • Step S6 Service packets between the center UPF and the edge UPF are communicated using a tunnel protocol.
  • the deployment structure in step S1 may be specifically shown in Figure 6 .
  • Figure 7 is an Nx signaling message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure.
  • the central UPF and the edge UPF communicate with each other through the Nx signaling message communication interface shown in Figure 7.
  • the Nx signaling message communication interface uses the PFCP protocol.
  • the central UPF and the edge UPF communicate with each other through the Nx service message communication interface, and the Nx service message communication interface uses a tunnel protocol.
  • tunnel protocol types include, but are not limited to, custom UDP protocol tunnels, GTP protocol tunnels, GRE protocol tunnels, etc.
  • Figure 8 is an Nx service message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure. As shown in Figure 8, the Nx service message communication interface uses a custom UDP protocol tunnel.
  • the InnerHead in Figure 8 adopts a 16-byte structure, as shown in Table 1 below, and the specific content can be adjusted.
  • InnerType in Table 1 is used to characterize the message type.
  • Exemplary, customized message types are shown in Table 2 below, but are not limited to Table 2.
  • FIG. 9 is a schematic diagram of the session and business process between edge UPF and center UPF in another embodiment of the present disclosure. As shown in Figure 9, the process includes the following steps:
  • Step S901 SMF triggers the establishment of N4 session process
  • Step S902 edge UPF1 receives the N4 Session Establishment/Modification/Release Request (N4 session creation/modification/release request) sent by SMF;
  • Step S903 edge UPF1 sends Session Establishment/Modification/Release Request (session creation/modification/release request) to center UPF1;
  • Step S904 the center UPF1 completes the creation/change/release operations such as allocating IP addresses or accepting SMF allocation of IP addresses, allocating service tunnel resources, etc.;
  • Step S905 the center UPF1 sends a Session Establishment/Modification/Release Response (session creation/modification/release response) to the edge UPF1;
  • Step S906 the center UPF1 sends Session Context Synchronizing (session context synchronization) to the center UPF2 to complete the synchronization backup and response confirmation of user session information, policy charging and other contexts;
  • edge UPF1 completes the creation/change/release of the N4 session and service tunnel, and sends the N4 Session Establishment/Modification/Release Response (N4 Session Creation/Modification/Release Response) to SMF;
  • Step S908 the center UPF1 sends a FlowContext Establishment/Modification/Release Request (flow context creation/change/release request) to the edge UPF1 to complete the creation/change/release of the user forwarding table flow table;
  • Step S909 the center UPF1 sends Flow Context Synchronizing (flow context synchronization) to UPFn in the edge UPF cluster to complete the information backup of the creation/change/release of the user forwarding table flow table.
  • Step S910 The edge UPF1 completes the local route publishing, change or deletion of the user IP.
  • Step S911 edge UPF1 sends Flow Context Establishment/Modification/Release Response (flow context creation/modification/release response) to central UPF1 to complete the issuance confirmation of the user forwarding table flow table;
  • Step S912 The edge user accesses campus business traffic and sends the uplink traffic to the edge UPF1 through the N3 interface.
  • the edge UPF1 sends the user traffic to the campus network through the N6 interface based on the session and rule information; the downlink traffic of the campus network is also sent through the N3 interface. to the user.
  • Edge UPF1 completes local traffic statistics and information reporting, and completes business information such as billing policies;
  • Step S913 The edge user accesses the Internet large network service traffic and sends the uplink traffic to the edge UPF1 through the N3 interface.
  • the edge UPF1 sends the user traffic to the central UPF or other core network UPF through the N9 interface based on the session and rule information; the Internet network Downstream traffic is also received through the N9 interface and sent to users through the N3 interface.
  • Edge UPF1 completes traffic statistics and information reporting, and completes business information such as charging policies.
  • Figure 10 is a schematic diagram of the disaster recovery process in an edge UPF abnormal scenario in another embodiment of the present disclosure.
  • the user's session and business process are consistent with the above steps S901 to S913.
  • the SMF network element or the central UPF network element detects the working status of the edge UPF.
  • edge UPFn is synchronously triggered to be selected as the user backup UPF.
  • the disaster recovery process in the edge UPF abnormal scenario includes the following steps:
  • Step S1001 SMF triggers the establishment of N4 session process
  • Step S1002 the edge UPFn receives the N4 Session Establishment/Modification/Release Request (N4 Session Creation/Modification/Release Request) sent by SMF;
  • Step S1003 edge UPFn sends Session Establishment/Modification/Release Request (Session creation/change/release request) to center UPF1;
  • Step S1004 the center UPF1 completes the creation/change/release operations such as allocating IP addresses or accepting SMF allocation of IP addresses, allocating service tunnel resources, etc.;
  • Step S1005 the center UPF1 sends a Session Establishment/Modification/Release Response (session creation/modification/release response) to the edge UPFn;
  • Step S1006 the edge UPFn completes the creation/change/release of the N4 session and service tunnel, and sends the N4 Session Establishment/Modification/Release Response (N4 Session Creation/Modification/Release Response) to the SMF;
  • Step S1007 the center UPF1 sends Session Context Synchronizing (session context synchronization) to the center UPF2 to complete the synchronization backup and response confirmation of user session information, policy charging and other contexts;
  • Session Context Synchronizing session context synchronization
  • Step S1008 the center UPF1 sends a Flow Context Establishment/Modification/Release Request (flow context creation/change/release request) to the edge UPFn to complete the creation/change/release of the user forwarding table flow table;
  • Step S1009 The edge UPFn completes the local route publishing, change or deletion of the user IP
  • Step S1010 the edge UPFn sends the Flow Context Establishment/Modification/Release Response (flow context creation/modification/release response) to the center UPF1 to complete the issuance confirmation of the user forwarding table flow table;
  • Step S1011 The edge user accesses campus business traffic and sends uplink traffic to the edge UPFn through the N3 interface.
  • the edge UPFn sends the user traffic to the campus network through the N6 interface based on the session and rule information; the downlink traffic of the campus network is also sent through the N3 interface. to the user.
  • the edge UPFn completes local traffic statistics and information reporting, and completes business information such as charging policies;
  • Step S1012 The edge user accesses Internet large network business traffic and sends uplink traffic to the edge UPFn through the N3 interface.
  • the edge UPFn sends the user traffic to the central UPF or other core network UPF through the N9 interface based on the session and rule information; the Internet network Downstream traffic is also received through the N9 interface and sent to users through the N3 interface.
  • the edge UPFn completes traffic statistics and information reporting, and completes business information such as charging policies.
  • the method also includes: the center UPF1 sends Flow Context Synchronizing (flow context synchronization) to other edge UPFs in the edge UPF cluster to complete the creation/change/release of the user forwarding table flow table. information backup.
  • the center UPF1 sends Flow Context Synchronizing (flow context synchronization) to other edge UPFs in the edge UPF cluster to complete the creation/change/release of the user forwarding table flow table. information backup.
  • Figure 11 is a schematic diagram of the disaster recovery process in a central UPF abnormal scenario in another embodiment of the present disclosure.
  • the edge UPF network element and the center UPF network element are normal, the user's session and business process are consistent with the above steps S901 to step S913.
  • the edge UPF detects that the center UPF is abnormal, it triggers the selection of center UPF2 As the primary center UPF.
  • Step S1101 SMF triggers the establishment of N4 session process
  • Step S1102 edge UPF1 receives the N4 Session Establishment/Modification/Release Request (N4 Session Creation/Modification/Release Request) sent by SMF;
  • edge UPF1 sends Session Establishment/Modification/Release Request (session creation/modification/release request) to center UPF2;
  • Step S1104 the center UPF2 enables local backup information, allocates IP addresses or accepts SMF allocation of IP addresses, allocates service tunnel resources and other creation/change/release operations;
  • Step S1105 the center UPF2 sends Session Establishment/Modification/Release Response (session create/change/release response) to edge UPF1;
  • Step S1106, edge UPF1 completes the creation/change/release of the N4 session and service tunnel, and sends the N4 Session Establishment/Modification/Release Response (N4 Session Creation/Modification/Release Response) to SMF;
  • Step S1107 the center UPF2 sends a Flow Context Establishment/Modification/Release Request (flow context creation/change/release request) to the edge UPF1 to complete the creation/change/release of the user forwarding table flow table;
  • Step S1108 the center UPF2 sends Flow Context Synchronizing (flow context synchronization) to UPFn in the edge UPF cluster to complete the information backup of the creation/change/release of the user forwarding table flow table.
  • Step S1109 Edge UPF1 completes the local route publishing, change or deletion of the user IP
  • Step S1110 edge UPF1 sends Flow Context Establishment/Modification/Release Response (flow context creation/modification/release response) to center UPF2 to complete the issuance confirmation of the user forwarding table flow table;
  • Step S1111 Edge users access campus business traffic and send uplink traffic to edge UPF1 through the N3 interface.
  • Edge UPF1 sends user traffic to the campus network through the N6 interface based on session and rule information; downlink traffic of the campus network is also sent through the N3 interface. to the user.
  • Edge UPF1 completes local traffic statistics and information reporting, and completes business information such as billing policies;
  • Step S1112 The edge user accesses the Internet large network business traffic and sends the uplink traffic to the edge UPF1 through the N3 interface.
  • the edge UPF1 sends the user traffic to the center UPF2 or other core network UPF through the N9 interface based on the session and rule information; the Internet network Downstream traffic is also received through the N9 interface and sent to users through the N3 interface.
  • Edge UPF1 completes traffic statistics and information reporting, and completes business information such as charging policies.
  • FIG. 12 is a block diagram of the signaling processing system according to the embodiment of the present disclosure.
  • the system includes: a central UPF network element 1202 and an edge UPF network. Element 1204, wherein the center UPF network element 1202 and the edge UPF network element 1204 are obtained by decoupling UPF network elements, and the center UPF network element 1202 and the edge UPF network element 1204 are deployed separately;
  • the edge UPF network element 1204 is configured to receive the session request signaling sent by the session management function SMF network element, and send the session request signaling to the central UPF network element through the Nx connection;
  • the central UPF network element 1202 is configured to determine the IP address and service tunnel resources of the edge UPF network element according to the session request signaling, and send session response signaling to the edge UPF network element through the Nx connection. , wherein the session response signaling includes the IP address and the service tunnel resource;
  • the edge UPF network element 1204 is also used to forward the session response signaling to the SMF network element.
  • the edge UPF network element 1202 communicates with the center UPF network element through Nx connection for signaling message communication and service message communication with the edge UPF network element.
  • the edge UPF network element 1202 and the central UPF network element communicate with each other in the Nx connection according to the packet forwarding control protocol PFCP protocol; and/or in the Nx connection according to the tunnel protocol.
  • the service message communication is performed in the Nx connection, wherein the tunnel protocol includes: User Datagram Protocol UDP, GPRS Tunnel Protocol GTP or General Routing Encapsulation GRE protocol.
  • Embodiments of the present disclosure also provide a computer-readable storage medium that stores a computer program, wherein the computer program executes the steps in any of the above method embodiments when run by a processor.
  • the computer-readable storage medium may include but is not limited to: USB flash drive, read-only storage medium
  • Various media that can store computer programs include Read-Only Memory (ROM for short), Random Access Memory (RAM for short), mobile hard disk, magnetic disk or optical disk.
  • Embodiments of the present disclosure also provide an electronic device, including a memory and a processor.
  • a computer program is stored in the memory, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.
  • the above-mentioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the above-mentioned processor, and the input-output device is connected to the above-mentioned processor.
  • modules or steps of the present disclosure can be implemented using general-purpose computing devices, and they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices. They may be implemented in program code executable by a computing device, such that they may be stored in a storage device for execution by the computing device, and in some cases may be executed in a sequence different from that shown herein. Or the described steps can be implemented by making them into individual integrated circuit modules respectively, or by making multiple modules or steps among them into a single integrated circuit module. As such, the present disclosure is not limited to any specific combination of hardware and software.

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Abstract

The present disclosure provides a user plane function (UPF) network element deployment method, a signaling processing method, and a system. The UPF network element deployment method comprises: decoupling a UPF network element into a central UPF network element and an edge UPF network element, separately deploying the central UPF network element and the edge UPF network element, and establishing an Nx connection between the central UPF network element and the edge UPF network element, wherein the central UPF network element is configured to perform signaling packet communication and service packet communication with the edge UPF network element by means of the Nx connection.

Description

一种用户面功能UPF网元部署、信令处理方法及***A user plane function UPF network element deployment, signaling processing method and system
相关申请的交叉引用Cross-references to related applications
本公开基于2022年09月15日提交的发明名称为“一种用户面功能UPF网元部署、信令处理方法及***”的中国专利申请CN202211127297.9，并且要求该专利申请的优先权，通过引用将其所公开的内容全部并入本公开。This disclosure is based on Chinese patent application CN202211127297.9, filed on September 15, 2022, entitled “A User Plane Function UPF Network Element Deployment, Signaling Processing Method and System”, and claims the priority of the patent application. All the contents disclosed therein are incorporated into this disclosure by reference.
技术领域Technical field
本公开涉及核心网领域，具体而言，涉及一种用户面功能UPF网元部署、信令处理方法及***。The present disclosure relates to the field of core networks, and specifically to a user plane function UPF network element deployment, signaling processing method and system.
背景技术Background technique
用户面功能(User Plane Function，简称UPF)在5G核心网中，主要完成用户面数据包的路由和转发、数据和业务识别、动作和策略执行。UPF完成第三代合作伙伴计划(the 3rd Generation Partner Project，简称3GPP)标准规范的会话、策略、计费、媒体转发等业务能力，同时，作为5G网络和多接入边缘计算之间的连接锚点，所有核心网数据必须经过UPF转发，才能流向外部网络。The User Plane Function (UPF) in the 5G core network mainly completes the routing and forwarding of user plane data packets, data and service identification, action and policy execution. UPF completes the session, policy, billing, media forwarding and other business capabilities of the 3rd Generation Partner Project (3GPP) standard specification, and at the same time, serves as the connection anchor between 5G networks and multi-access edge computing. Point, all core network data must be forwarded by UPF before it can flow to the external network.
图1是基于5G和UPF网元的基本网络结构图，如图1所示，基于5G核心网(5G Core，简称5GC)的C/U分离式架构，控制面网络功能(Network Function，简称NF)网元在数据中心(Data Center，简称DC)集中部署，UPF网元下沉到网络边缘部署，这样可以减少传输时延，实现数据流量的本地分流，缓解核心网的数据传输压力，从而提升网络数据处理效率，满足垂直行业对网络超低时延、超高带宽以及安全等方面的诉求。Figure 1 is a basic network structure diagram based on 5G and UPF network elements. As shown in Figure 1, it is based on the C/U separated architecture of the 5G core network (5G Core, 5GC for short), and the control plane network function (Network Function, NF for short) ) network elements are deployed centrally in the Data Center (DC), and UPF network elements are deployed at the edge of the network. This can reduce transmission delays, achieve local diversion of data traffic, relieve the data transmission pressure on the core network, and thereby improve Network data processing efficiency meets the demands of vertical industries for ultra-low network latency, ultra-high bandwidth, and security.
UPF是核心网最重要的网元之一，也是5G数据处理和转发的核心功能，必须具备电信级的产品品质。而且，UPF作为推动5G与千行百业融合的重要网络节点，正逐步从核心网走到行业用户的园区，政企客户对于应用的大带宽、低时延、高可靠、高安全都有很大需求。UPF is one of the most important network elements of the core network and the core function of 5G data processing and forwarding. It must have carrier-grade product quality. Moreover, UPF, as an important network node that promotes the integration of 5G and thousands of industries, is gradually moving from the core network to the campus of industry users. Government and enterprise customers are very interested in the large bandwidth, low latency, high reliability, and high security of applications. need.
因此，相关技术中不仅要求UPF网元满足3GPP架构要求的特性功能，同时也要满足性能、运维、组网等要求；尤其在边缘园区应用中，迫切需要一种既能成本低廉、快速部署、运维便利的轻量级UPF，又要实现高可靠性的备份和容灾能力，满足企业园区的5G特色应用。Therefore, related technologies not only require UPF network elements to meet the features and functions required by the 3GPP architecture, but also meet performance, operation and maintenance, networking and other requirements; especially in edge campus applications, there is an urgent need for a low-cost, rapid deployment , lightweight UPF that facilitates operation and maintenance, and also needs to achieve high-reliability backup and disaster recovery capabilities to meet the unique 5G applications in enterprise campuses.
针对相关技术中需要一种成本低廉、快速部署、运维便利的轻量级UPF的问题，还没有解决方法。There is no solution to the problem of requiring a lightweight UPF with low cost, rapid deployment, and convenient operation and maintenance in related technologies.
发明内容Contents of the invention
本公开实施例提供了一种用户面功能UPF网元部署方法、信令处理方法、***、存储介质及电子装置，以至少解决相关技术中需要一种成本低廉、快速部署、运维便利的轻量级UPF的问题。Embodiments of the present disclosure provide a user plane function UPF network element deployment method, signaling processing method, system, storage medium and electronic device, to at least solve the need in related technologies for a lightweight, low-cost, rapid deployment, and convenient operation and maintenance. The problem of magnitude UPF.
根据本公开的一个实施例，提供了一种用户面功能UPF网元部署方法，该方法包括：将 用户面功能UPF网元解耦为中心UPF网元与边缘UPF网元；将中心UPF网元与边缘UPF网元分开部署；在中心UPF网元与边缘UPF网元之间建立Nx连接，其中，中心UPF网元用于通过Nx连接与边缘UPF网元进行信令报文通信和业务报文通信。According to an embodiment of the present disclosure, a user plane function UPF network element deployment method is provided, which method includes: The user plane function UPF network element is decoupled into a central UPF network element and an edge UPF network element; the central UPF network element and the edge UPF network element are deployed separately; an Nx connection is established between the center UPF network element and the edge UPF network element, where, The central UPF network element is used to communicate signaling messages and service messages with edge UPF network elements through Nx connections.
根据本公开的另一个实施例，提供了一种信令处理方法，应用于边缘UPF网元，该方法包括：接收会话管理功能(Session Management Function，简称SMF)网元发送的会话请求信令；通过Nx连接将会话请求信令发送给中心用户面功能UPF网元，其中，中心UPF网元与边缘UPF网元是UPF网元解耦得到的，且中心UPF网元与边缘UPF网元分开部署；通过Nx连接接收中心UPF网元在处理会话请求信令后返回的会话响应信令；将会话响应信令转发给SMF网元。According to another embodiment of the present disclosure, a signaling processing method is provided, which is applied to an edge UPF network element. The method includes: receiving session request signaling sent by a Session Management Function (Session Management Function, referred to as SMF) network element; Session request signaling is sent to the central user plane function UPF network element through the Nx connection. The central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the central UPF network element and the edge UPF network element are deployed separately. ; Receive the session response signaling returned by the central UPF network element after processing the session request signaling through the Nx connection; forward the session response signaling to the SMF network element.
根据本公开的另一个实施例，提供了一种信令处理方法，应用于中心UPF网元，该方法包括：通过Nx连接接收边缘UPF网元发送的会话请求信令，其中，会话请求信令是边缘UPF网元从会话管理功能SMF网元接收的，中心UPF网元与边缘UPF网元是UPF网元解耦得到的，且中心UPF网元与边缘UPF网元分开部署；根据会话请求信令确定边缘UPF网元的IP地址和业务隧道资源；通过Nx连接将会话响应信令发送给边缘UPF网元，其中，会话响应信令中包含IP地址和业务隧道资源。According to another embodiment of the present disclosure, a signaling processing method is provided, which is applied to a central UPF network element. The method includes: receiving session request signaling sent by an edge UPF network element through an Nx connection, wherein the session request signaling It is received by the edge UPF network element from the session management function SMF network element. The central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the central UPF network element and the edge UPF network element are deployed separately; according to the session request information Determine the IP address and service tunnel resources of the edge UPF network element; send session response signaling to the edge UPF network element through the Nx connection, where the session response signaling contains the IP address and service tunnel resources.
根据本公开的另一个实施例，提供了一种信令处理***，该***包括：边缘UPF网元，用于接收会话管理功能SMF网元发送的会话请求信令，通过Nx连接将会话请求信令发送给中心用户面功能UPF网元，通过Nx连接接收中心UPF网元在处理会话请求信令后返回的会话响应信令，将会话响应信令转发给SMF网元；中心UPF网元，用于通过Nx连接接收边缘UPF网元发送的会话请求信令，根据会话请求信令确定边缘UPF网元的IP地址和业务隧道资源，通过Nx连接将会话响应信令发送给边缘UPF网元，其中，会话响应信令中包含IP地址和业务隧道资源；其中，中心UPF网元与边缘UPF网元是UPF网元解耦得到的，且中心UPF网元与边缘UPF网元分开部署。According to another embodiment of the present disclosure, a signaling processing system is provided. The system includes: an edge UPF network element, configured to receive session request signaling sent by the session management function SMF network element, and transmit the session request signaling through the Nx connection. The command is sent to the central user plane function UPF network element, receives the session response signaling returned by the central UPF network element after processing the session request signaling through the Nx connection, and forwards the session response signaling to the SMF network element; the central UPF network element uses It receives the session request signaling sent by the edge UPF network element through the Nx connection, determines the IP address and service tunnel resources of the edge UPF network element according to the session request signaling, and sends the session response signaling to the edge UPF network element through the Nx connection, where , the session response signaling contains IP addresses and service tunnel resources; among them, the central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the central UPF network element and the edge UPF network element are deployed separately.
根据本公开的又一个实施例，还提供了一种计算机可读的存储介质，存储介质中存储有计算机程序，其中，计算机程序被处理器运行时执行上述任一项方法实施例中的步骤。According to yet another embodiment of the present disclosure, a computer-readable storage medium is also provided. A computer program is stored in the storage medium, wherein the computer program executes the steps in any of the above method embodiments when run by a processor.
根据本公开的又一个实施例，还提供了一种电子装置，包括存储器和处理器，存储器中存储有计算机程序，处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。According to yet another embodiment of the present disclosure, an electronic device is also provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments. .
附图说明Description of drawings
图1是基于5G和UPF网元的基本网络结构图；Figure 1 is a basic network structure diagram based on 5G and UPF network elements;
图2是本公开实施例的用户面功能UPF网元部署的硬件结构框图；Figure 2 is a hardware structural block diagram of the user plane function UPF network element deployment according to an embodiment of the present disclosure;
图3是根据本公开实施例的用户面功能UPF网元部署的流程图；Figure 3 is a flow chart of user plane function UPF network element deployment according to an embodiment of the present disclosure;
图4是本公开实施例中边缘UPF网元信令处理方法的流程图；Figure 4 is a flow chart of an edge UPF network element signaling processing method in an embodiment of the present disclosure;
图5是本公开实施例中中心UPF网元信令处理方法的流程图；Figure 5 is a flow chart of a central UPF network element signaling processing method in an embodiment of the present disclosure;
图6是本公开实施例中用户面功能UPF网元的网络架构图；Figure 6 is a network architecture diagram of a user plane function UPF network element in an embodiment of the present disclosure;
图7是本公开实施例中边缘UPF网元与中心UPF网元的Nx信令报文通信接口；Figure 7 is the Nx signaling message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure;
图8是本公开实施例中边缘UPF网元与中心UPF网元的Nx业务报文通信接口；Figure 8 is the Nx service message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure;
图9是本公开另一实施例中边缘UPF与中心UPF的会话及业务流程示意图；Figure 9 is a schematic diagram of the session and business process between edge UPF and center UPF in another embodiment of the present disclosure;
图10是本公开另一实施例中边缘UPF异常场景下的容灾流程示意图； Figure 10 is a schematic diagram of the disaster recovery process in an edge UPF abnormal scenario in another embodiment of the present disclosure;
图11是本公开另一实施例中中心UPF异常场景下的容灾流程示意图；Figure 11 is a schematic diagram of the disaster recovery process in the abnormal scenario of central UPF in another embodiment of the present disclosure;
图12是根据本公开实施例的信令处理***的框图。Figure 12 is a block diagram of a signaling processing system according to an embodiment of the present disclosure.
具体实施方式Detailed ways
下文中将参考附图并结合实施例来详细说明本公开的实施例。Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and embodiments.
需要说明的是，本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。It should be noted that the terms "first", "second", etc. in the description and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
本公开实施例中所提供的方法实施例可以在移动终端、计算机终端、云服务器或者类似的运算装置中执行。以运行在计算机终端上为例，图2是本公开实施例的用户面功能UPF网元部署的硬件结构框图，如图2所示，硬件单板可以包括一个或多个(图2中仅示出一个)处理器202(处理器202可以包括但不限于微处理器MCU或可编程逻辑器件FPGA等的处理装置)和用于存储数据的存储器204，其中，上述移动终端还可以包括用于通信功能的传输设备206以及输入输出设备208。本领域普通技术人员可以理解，图2所示的结构仅为示意，其并不对上述移动终端的结构造成限定。例如，移动终端还可包括比图2中所示更多或者更少的组件，或者具有与图2所示不同的配置。The method embodiments provided in the embodiments of the present disclosure can be executed in a mobile terminal, a computer terminal, a cloud server, or a similar computing device. Taking running on a computer terminal as an example, Figure 2 is a hardware structural block diagram of the user plane function UPF network element deployment according to an embodiment of the present disclosure. As shown in Figure 2, the hardware single board can include one or more (only shown in Figure 2 A) processor 202 (the processor 202 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 204 for storing data, wherein the above-mentioned mobile terminal may also include a processor for communication Functional transmission device 206 and input and output device 208. Persons of ordinary skill in the art can understand that the structure shown in FIG. 2 is only illustrative, and it does not limit the structure of the above-mentioned mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 2 , or have a different configuration than shown in FIG. 2 .
存储器204可用于存储计算机程序，例如，应用软件的软件程序以及模块，如本公开实施例中的用户面功能UPF网元部署对应的计算机程序，处理器202通过运行存储在存储器204内的计算机程序，从而执行各种功能应用以及负载均衡处理处理，即实现上述的方法。存储器204可包括高速随机存储器，还可包括非易失性存储器，如一个或者多个磁性存储装置、闪存、或者其他非易失性固态存储器。在一些实例中，存储器204可进一步包括相对于处理器202远程设置的存储器，这些远程存储器可以通过网络连接至移动终端。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。The memory 204 can be used to store computer programs, for example, software programs and modules of application software, such as the computer programs corresponding to the user plane function UPF network element deployment in the embodiment of the present disclosure. The processor 202 runs the computer programs stored in the memory 204 , thereby executing various functional applications and load balancing processing, that is, implementing the above method. Memory 204 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 204 may further include memory located remotely relative to the processor 202, and these remote memories may be connected to the mobile terminal through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.
传输设备206用于经由一个网络接收或者发送数据。上述的网络具体实例可包括通信供应商提供的无线网络。在一个实例中，传输设备206包括一个网络适配器(Network Interface Controller，简称为NIC)，其可通过基站与其他网络设备相连从而可与互联网进行通讯。在一个实例中，传输设备206可以为射频(Radio Frequency，简称为RF)模块，其用于通过无线方式与互联网进行通讯。Transmission device 206 is used to receive or send data via a network. Specific examples of the above-mentioned network may include wireless networks provided by communication providers. In one example, the transmission device 206 includes a network adapter (Network Interface Controller, NIC for short), which can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 206 may be a radio frequency (Radio Frequency, RF for short) module, which is used to communicate with the Internet wirelessly.
在本实施例中提供了一种用户面功能UPF网元部署方法，图3是根据本公开实施例的用户面功能UPF网元部署的流程图，如图3所示，该流程包括如下步骤：This embodiment provides a user plane function UPF network element deployment method. Figure 3 is a flow chart of user plane function UPF network element deployment according to an embodiment of the present disclosure. As shown in Figure 3, the process includes the following steps:
步骤S302，将用户面功能UPF网元解耦为中心UPF网元与边缘UPF网元；Step S302: Decouple the user plane function UPF network element into a central UPF network element and an edge UPF network element;
步骤S304，将中心UPF网元与边缘UPF网元分开部署；Step S304, deploy the central UPF network element and the edge UPF network element separately;
步骤S306，在中心UPF网元与边缘UPF网元之间建立Nx连接，其中，中心UPF网元用于通过Nx连接与边缘UPF网元进行信令报文通信和业务报文通信。Step S306: Establish an Nx connection between the central UPF network element and the edge UPF network element. The central UPF network element is used to communicate signaling messages and service messages with the edge UPF network element through the Nx connection.
在本实施例中，所述部署方法还包括：In this embodiment, the deployment method further includes:
步骤S308，通过所述中心UPF网元配置所述边缘UPF网元的IP地址池，其中，所述IP地址池用于指示园区网内的IP地址；Step S308, configure the IP address pool of the edge UPF network element through the central UPF network element, where the IP address pool is used to indicate the IP address in the campus network;
步骤S310，通过所述Nx连接将所述IP地址池下发给所述边缘UPF网元。Step S310: deliver the IP address pool to the edge UPF network element through the Nx connection.
在本实施例中，上述步骤S306中的中心UPF网元用通过Nx连接与边缘UPF网元进行信令报文通信和业务报文通信具体可以包括：In this embodiment, the central UPF network element in the above step S306 communicates signaling messages and service messages with the edge UPF network element through the Nx connection, which may specifically include:
根据数据包转发控制协议(Packet Forwarding Control Protocol，简称PFCP)在所述 Nx连接中进行所述信令报文通信；和/或According to the Packet Forwarding Control Protocol (PFCP) as described in The signaling message communication is performed in the Nx connection; and/or
根据隧道协议在所述Nx连接中进行所述业务报文通信，其中，所述隧道协议包括：用户数据报协议(User Datagram Protocol，简称UDP)、GPRS隧道协议(GPRSTunnelingProtocol，简称GTP)或通用路由封装(Generic Routing Encapsulation，简称GRE)协议。其中，通用无线分组业务(General Packet Radio Service，简称为GPRS)。The service message communication is performed in the Nx connection according to a tunnel protocol, wherein the tunnel protocol includes: User Datagram Protocol (User Datagram Protocol, referred to as UDP), GPRS Tunneling Protocol (GPRS Tunneling Protocol, referred to as GTP) or universal routing Encapsulation (Generic Routing Encapsulation, GRE for short) protocol. Among them, General Packet Radio Service (GPRS).
在本实施例中，所述部署方法还包括：In this embodiment, the deployment method further includes:
步骤S312，部署至少一个备用中心UPF网元和至少一个备用边缘UPF网元；Step S312, deploy at least one backup center UPF network element and at least one backup edge UPF network element;
步骤S314，在所述备用中心UPF网元与所述边缘UPF网元之间建立所述Nx连接；Step S314, establish the Nx connection between the backup center UPF network element and the edge UPF network element;
步骤S316，在所述备用中心UPF网元与所述中心UPF网元之间建立所述Nx连接，其中，所述中心UPF网元用于通过所述Nx连接将会话上下文同步给所述备用中心UPF网元；Step S316: Establish the Nx connection between the backup center UPF network element and the central UPF network element, wherein the central UPF network element is used to synchronize the session context to the backup center through the Nx connection. UPF network element;
步骤S318，在所述备用边缘UPF网元与所述中心UPF网元之间建立所述Nx连接，其中，所述中心UPF网元还用于通过所述Nx连接将流上下文同步给所述备用边缘UPF网元。Step S318: Establish the Nx connection between the backup edge UPF network element and the central UPF network element, wherein the central UPF network element is also used to synchronize flow context to the backup network element through the Nx connection. Edge UPF network element.
在本实施例中，通过上述步骤S302至步骤S306，可以实现将原本复杂、昂贵的UPF网元解耦为轻量级的中心UPF网元和边缘UPF网元，降低了单个UPF网元的部署和运维成本，提高了部署效率；同时，通过上述步骤S312至步骤S316，可以对中心UPF网元和边缘UPF网元分别备份，增强了UPF网元的可靠性和容灾能力。In this embodiment, through the above steps S302 to S306, the originally complex and expensive UPF network element can be decoupled into a lightweight central UPF network element and an edge UPF network element, thereby reducing the deployment of a single UPF network element. and operation and maintenance costs, improving deployment efficiency; at the same time, through the above steps S312 to step S316, the central UPF network element and the edge UPF network element can be backed up separately, which enhances the reliability and disaster recovery capability of the UPF network element.
在本公开的另一实施例中提供了一种信令处理方法，应用于边缘UPF网元，图4是本公开实施例中边缘UPF网元信令处理方法的流程图，如图4所示，该流程包括如下步骤：In another embodiment of the present disclosure, a signaling processing method is provided, which is applied to edge UPF network elements. Figure 4 is a flow chart of the signaling processing method of edge UPF network elements in the embodiment of the present disclosure, as shown in Figure 4 , the process includes the following steps:
步骤S402，接收会话管理功能SMF网元发送的会话请求信令；Step S402: Receive the session request signaling sent by the session management function SMF network element;
步骤S404，通过Nx连接将所述会话请求信令发送给中心用户面功能UPF网元，其中，所述中心UPF网元与所述边缘UPF网元是UPF网元解耦得到的，且所述中心UPF网元与所述边缘UPF网元分开部署；Step S404: Send the session request signaling to the central user plane function UPF network element through the Nx connection, where the central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the The central UPF network element and the edge UPF network element are deployed separately;
步骤S406，通过所述Nx连接接收所述中心UPF网元在处理所述会话请求信令后返回的会话响应信令；Step S406: Receive the session response signaling returned by the central UPF network element after processing the session request signaling through the Nx connection;
步骤S408，将所述会话响应信令转发给所述SMF网元。Step S408: Forward the session response signaling to the SMF network element.
在本实施例中，会话请求信令具体可以包括：会话创建请求、会话变更请求或会话释放请求。In this embodiment, the session request signaling may specifically include: a session creation request, a session change request, or a session release request.
在本实施例中，边缘UPF还可以通过N3、N4、N6、N9等接口对接5G核心网SMF网元、UPF网元、UE及其它I-UPF、ULCL主锚点UPF等对接，实现园区UPF的业务分流，包括UL-CL(Uplink Classifier)上行分流、IPv6多归属分流、本地数据网络(Local Area Data Network，简称LADN)等3GPP规范业务流程。In this embodiment, the edge UPF can also connect to the 5G core network SMF network element, UPF network element, UE and other I-UPF, ULCL main anchor point UPF, etc. through interfaces such as N3, N4, N6, and N9 to realize campus UPF. Business offloading, including UL-CL (Uplink Classifier) uplink offloading, IPv6 multi-homing offloading, Local Area Data Network (LADN) and other 3GPP standardized business processes.
在本实施例中，通过上述步骤S402至步骤S408，实现了将UPF网元解耦得到边缘UPF网元和中心UPF网元以后，依然能够满足3GPP架构中对UPF网元的规定，保证了UPF网元的基本功能。In this embodiment, through the above-mentioned steps S402 to S408, after the UPF network element is decoupled to obtain the edge UPF network element and the central UPF network element, the regulations for UPF network elements in the 3GPP architecture can still be met, ensuring that UPF Basic functions of network elements.
在本实施例中，在步骤S408之后，所述方法还可以包括：In this embodiment, after step S408, the method may further include:
根据所述会话响应信令对会话和业务隧道进行创建、变更或释放处理，其中，所述会话响应信令包括：会话创建响应、会话变更响应或会话释放响应；Create, change or release sessions and service tunnels according to the session response signaling, where the session response signaling includes: session creation response, session change response or session release response;
所述会话响应信令中包含边缘UPF网元的IP地址和业务隧道资源，其中，所述边缘UPF 网元的IP地址是所述SMF网元或所述中心UPF网元分配的，所述业务隧道资源是所述中心UPF网元分配的。The session response signaling includes the IP address and service tunnel resources of the edge UPF network element, where the edge UPF The IP address of the network element is allocated by the SMF network element or the central UPF network element, and the service tunnel resource is allocated by the central UPF network element.
在本实施例中，在步骤S408之后，所述方法还可以包括：In this embodiment, after step S408, the method may further include:
通过所述Nx连接接收所述中心UPF网元发送的流上下文请求，其中，所述流上下文请求包括：流上下文创建请求、流上下文变更请求或流上下文释放请求；Receive a flow context request sent by the central UPF network element through the Nx connection, where the flow context request includes: a flow context creation request, a flow context change request or a flow context release request;
根据所述流上下文请求对转发表或流表进行创建、变更或释放处理；Create, change or release the forwarding table or flow table according to the flow context request;
根据所述流上下文请求对IP地址池的路由表进行发布、变更或删除处理，其中，所述IP地址池用于指示园区网内的IP地址；Publish, change or delete the routing table of the IP address pool according to the flow context request, where the IP address pool is used to indicate IP addresses in the campus network;
通过所述Nx连接将流上下文响应发送给所述中心UPF网元，其中，所述流上下文响应包括：流上下文创建响应、流上下文变更响应或流上下文释放响应。A flow context response is sent to the central UPF network element through the Nx connection, where the flow context response includes: a flow context creation response, a flow context change response or a flow context release response.
在本实施例中，在通过Nx连接将流上下文响应发送给所述中心UPF网元之后，所述方法还包括：In this embodiment, after sending the flow context response to the central UPF network element through the Nx connection, the method further includes:
接收边缘用户发送的上行流量；Receive uplink traffic sent by edge users;
判断所述上行流量要访问的IP地址是否在所述IP地址池内；Determine whether the IP address to be accessed by the upstream traffic is in the IP address pool;
在判断结果为是的情况下，将所述上行流量确定为第一上行流量，其中，所述第一上行流量用于在园区网内进行业务访问；If the judgment result is yes, determine the upstream traffic as the first upstream traffic, wherein the first upstream traffic is used for business access in the campus network;
在判断结果为否的情况下，将所述上行流量确定为第二上行流量，其中，所述第二上行流量用于对园区网以外的互联网进行业务访问；If the judgment result is no, determine the upstream traffic as second upstream traffic, wherein the second upstream traffic is used for business access to the Internet outside the campus network;
将业务访问结果发送给所述边缘用户。Send the service access results to the edge users.
在本实施例中，在将业务访问结果发送给所述边缘用户之前，所述方法还可以包括：In this embodiment, before sending the service access result to the edge user, the method may further include:
根据所述转发表或流表将所述第一上行流量发送给园区网，并接收所述园区网返回的第一下行流量，其中，所述第一下行流量为所述园区网的业务访问结果；和/或Send the first uplink traffic to the campus network according to the forwarding table or flow table, and receive the first downlink traffic returned by the campus network, where the first downlink traffic is a service of the campus network Access results; and/or
将所述第二上行流量发送给所述中心UPF网元或核心网UPF网元，并接收所述中心UPF网元或所述核心网UPF网元发送的第二下行流量，其中，所述第二下行流量为所述互联网的业务访问结果。The second uplink traffic is sent to the center UPF network element or the core network UPF network element, and the second downlink traffic sent by the center UPF network element or the core network UPF network element is received, wherein the The second downlink traffic is the result of business access to the Internet.
在本实施例中，上行流量具体可以是对互联网或园区网的业务数据访问请求，下行流量可以是网站或业务提供者返回的业务数据访问响应，边缘UPF网元可以直接转发园区网内部的上行流量，降低了网络访问延时，且实现了数据隔离，保证了网络访问的安全性。In this embodiment, the uplink traffic may specifically be service data access requests to the Internet or campus network, and the downlink traffic may be service data access responses returned by websites or service providers. The edge UPF network elements may directly forward uplink traffic within the campus network. traffic, reducing network access delay, and achieving data isolation to ensure the security of network access.
在本实施例中，在将上行流量发送给中心UPF网元、核心网UPF网元或园区网之后，所述方法还包括：In this embodiment, after sending the uplink traffic to the central UPF network element, the core network UPF network element or the campus network, the method further includes:
对所述园区网和所述互联网内的业务访问分别进行流量统计，得到流量统计信息；Perform traffic statistics on business access in the campus network and the Internet respectively to obtain traffic statistics information;
通过所述Nx连接将所述流量统计信息上报给所述中心UPF网元；Report the traffic statistics information to the central UPF network element through the Nx connection;
根据所述流量统计信息进行策略控制和计费。Policy control and billing are performed based on the traffic statistics information.
在本实施例中，所述方法还包括：根据数据包转发控制协议PFCP协议发送所述会话请求信令，并根据所述PFCP协议接收所述会话响应信令；和/或根据隧道协议接收所述流上下文请求，并根据所述隧道协议发送所述流上下文响应，其中，所述隧道协议包括：用户数据报协议UDP、GPRS隧道协议GTP或通用路由封装GRE协议。In this embodiment, the method further includes: sending the session request signaling according to the Data Packet Forwarding Control Protocol PFCP protocol, and receiving the session response signaling according to the PFCP protocol; and/or receiving the session response signaling according to the tunneling protocol. Describe the flow context request, and send the flow context response according to the tunnel protocol, wherein the tunnel protocol includes: User Datagram Protocol UDP, GPRS Tunnel Protocol GTP or General Routing Encapsulation GRE protocol.
在本实施例中，所述方法还包括：In this embodiment, the method further includes:
检测所述中心UPF网元的工作状态是否异常，其中，所述中心UPF网元为主用中心UPF 网元，所述主用中心UPF网元对应至少一个备用中心UPF网元；Detect whether the working status of the central UPF network element is abnormal, wherein the central UPF network element is the main central UPF Network element, the main central UPF network element corresponds to at least one backup central UPF network element;
在检测结果为是的情况下，将所述至少一个备用中心UPF网元中的一个备用中心UPF网元设置为主用中心UPF网元。If the detection result is yes, one of the at least one backup central UPF network element is set as the main central UPF network element.
在本实施例中，可以通过边缘UPF网元对中心UPF网元的工作状态进行检测，也可以通过备用中心UPF网元对主用中心UPF网元的工作状态进行检测。备用中心UPF网元与主用中心UPF网元也可以建立Nx连接，通过Nx连接进行会话上下文等数据备份。In this embodiment, the working status of the central UPF network element can be detected through the edge UPF network element, and the working status of the active central UPF network element can also be detected through the backup central UPF network element. The backup center UPF network element and the active center UPF network element can also establish an Nx connection, and perform data backup such as session context through the Nx connection.
在本实例中，通过对中心UPF网元进行备份，可以实现用户数据信息、流量数据信息、计费策略信息的备份容灾，实现了数据的无损迁移，具备较高的可靠性。In this example, by backing up the central UPF network element, backup and disaster recovery of user data information, traffic data information, and billing policy information can be achieved, achieving lossless data migration with high reliability.
在本公开的另一实施例中提供了一种信令处理方法，应用于中心UPF网元，图5是本公开实施例中中心UPF网元信令处理方法的流程图，如图5所示，该流程包括如下步骤：In another embodiment of the present disclosure, a signaling processing method is provided, which is applied to the central UPF network element. Figure 5 is a flow chart of the signaling processing method of the central UPF network element in the embodiment of the present disclosure, as shown in Figure 5 , the process includes the following steps:
步骤S502，通过Nx连接接收边缘UPF网元发送的会话请求信令，其中，所述会话请求信令是所述边缘UPF网元从会话管理功能SMF网元接收的，所述中心UPF网元与所述边缘UPF网元是UPF网元解耦得到的，且所述中心UPF网元与所述边缘UPF网元分开部署；Step S502: Receive session request signaling sent by the edge UPF network element through the Nx connection, where the session request signaling is received by the edge UPF network element from the session management function SMF network element, and the central UPF network element and The edge UPF network element is obtained by decoupling the UPF network element, and the center UPF network element and the edge UPF network element are deployed separately;
步骤S504，根据所述会话请求信令确定所述边缘UPF网元的IP地址和业务隧道资源；Step S504: Determine the IP address and service tunnel resources of the edge UPF network element according to the session request signaling;
步骤S506，通过Nx连接将会话响应信令发送给所述边缘UPF网元，其中，所述会话响应信令中包含所述IP地址和所述业务隧道资源。Step S506: Send session response signaling to the edge UPF network element through the Nx connection, where the session response signaling includes the IP address and the service tunnel resource.
在本实施例中，中心UPF还可以通过N3、N4、N6等接口与5G核心网SMF网元、互联网等对接，保证了3GPP规范业务流程的实现。In this embodiment, the central UPF can also interface with the 5G core network SMF network element, the Internet, etc. through N3, N4, N6 and other interfaces, ensuring the realization of 3GPP standardized business processes.
在本实施例中，通过上述步骤S502至步骤S506，实现了将UPF网元解耦得到边缘UPF网元和中心UPF网元以后，依然能够满足3GPP架构中对UPF网元的规定，保证了UPF网元的基本功能。In this embodiment, through the above-mentioned steps S502 to S506, after the UPF network element is decoupled to obtain the edge UPF network element and the central UPF network element, the regulations for UPF network elements in the 3GPP architecture can still be met, ensuring that UPF Basic functions of network elements.
在本实施例中，上述步骤S504具体可以包括：In this embodiment, the above step S504 may specifically include:
根据所述会话请求信令将所述IP地址分配给所述边缘UPF网元，或者，对所述会话请求信令中所述SMF网元分配的所述IP地址进行确认，其中，所述会话请求信令包括：会话创建请求、会话变更请求或会话释放请求；Allocate the IP address to the edge UPF network element according to the session request signaling, or confirm the IP address allocated by the SMF network element in the session request signaling, wherein the session Request signaling includes: session creation request, session change request or session release request;
根据所述会话请求信令将所述业务隧道资源分配给所述边缘UPF网元。The service tunnel resource is allocated to the edge UPF network element according to the session request signaling.
在本实施例中，在步骤S506之后，所述方法还包括：In this embodiment, after step S506, the method further includes:
通过Nx连接将流上下文请求发送给所述边缘UPF网元，其中，所述流上下文请求包括：流上下文创建请求、流上下文变更请求或流上下文释放请求；Send the flow context request to the edge UPF network element through the Nx connection, where the flow context request includes: a flow context creation request, a flow context change request or a flow context release request;
通过Nx连接接收所述边缘UPF网元发送的流上下文响应，其中，所述流上下文响应是所述边缘UPF网元根据所述流上下文请求对转发表或流表进行创建、变更或释放处理之后，且对IP地址池的路由表进行发布、变更或删除处理之后发送的。Receive the flow context response sent by the edge UPF network element through the Nx connection, wherein the flow context response is after the edge UPF network element creates, changes or releases the forwarding table or flow table according to the flow context request. , and is sent after publishing, changing or deleting the routing table of the IP address pool.
在本实施例中，在通过Nx连接接收所述边缘UPF网元发送的流上下文响应之后，所述方法还包括：In this embodiment, after receiving the flow context response sent by the edge UPF network element through the Nx connection, the method further includes:
接收所述边缘UPF网元发送的第二上行流量，其中，所述第二上行流量用于对园区网以外的互联网进行业务访问，所述第二上行流量要访问的IP地址不在所述IP地址池内；Receive the second upstream traffic sent by the edge UPF network element, wherein the second upstream traffic is used for business access to the Internet outside the campus network, and the IP address to be accessed by the second upstream traffic is not in the IP address. inside the pool;
将所述第二上行流量发送给所述互联网；Send the second uplink traffic to the Internet;
接收所述互联网返回的第二下行流量，其中，所述第二下行流量为所述互联网的业务访 问结果；Receive second downlink traffic returned by the Internet, where the second downlink traffic is business access to the Internet. Ask about the result;
将所述第二下行流量发送给所述边缘UPF网元。Send the second downlink traffic to the edge UPF network element.
在本实施例中，在将所述第二下行流量发送给所述边缘UPF网元之后，所述方法还包括：In this embodiment, after sending the second downlink traffic to the edge UPF network element, the method further includes:
通过Nx连接接收所述边缘UPF网元上报的流量统计信息，其中，所述流量统计信息是所述边缘UPF网元根据所述园区网和所述互联网内的业务访问分别进行流量统计得到的。The traffic statistics information reported by the edge UPF network element is received through the Nx connection, where the traffic statistics information is obtained by the edge UPF network element performing traffic statistics based on business access in the campus network and the Internet respectively.
在本实施例中，所述方法还包括：根据数据包转发控制协议PFCP协议接收所述会话请求信令，并根据所述PFCP协议发送所述会话响应信令；和/或根据隧道协议发送所述流上下文请求，并根据所述隧道协议接收所述流上下文响应，其中，所述隧道协议包括：用户数据报协议UDP、GPRS隧道协议GTP或通用路由封装GRE协议。In this embodiment, the method further includes: receiving the session request signaling according to the Data Packet Forwarding Control Protocol PFCP protocol, and sending the session response signaling according to the PFCP protocol; and/or sending the session response signaling according to the tunnel protocol. Describe the flow context request, and receive the flow context response according to the tunnel protocol, wherein the tunnel protocol includes: User Datagram Protocol UDP, GPRS Tunnel Protocol GTP or General Routing Encapsulation GRE protocol.
在本实施例中，所述方法还包括：In this embodiment, the method further includes:
检测所述边缘UPF网元的工作状态是否异常，其中，所述边缘UPF网元为主用边缘UPF网元，所述主用边缘UPF网元对应至少一个备用边缘UPF网元；Detect whether the working status of the edge UPF network element is abnormal, wherein the edge UPF network element is the main edge UPF network element, and the main edge UPF network element corresponds to at least one backup edge UPF network element;
在检测结果为是的情况下，将所述至少一个备用边缘UPF网元中的一个备用边缘UPF网元设置为主用边缘UPF网元。If the detection result is yes, one of the at least one backup edge UPF network element is set as the main edge UPF network element.
在本实施例中，也可以通过SMF网元对边缘UPF网元的工作状态进行检测，并直接由SMF网元指定一个备用边缘UPF网元为新的主用边缘UPF网元。In this embodiment, the working status of the edge UPF network element can also be detected through the SMF network element, and a backup edge UPF network element can be directly designated by the SMF network element as the new active edge UPF network element.
在本实例中，通过对边缘UPF网元进行备份，实现了只要还存在正常工作的边缘UPF网元，就能保证用户业务和数据流量不受影响，在边缘UPF异常时，还能实现数据的无损迁移，具备较高的可靠性。In this example, by backing up the edge UPF network elements, it is possible to ensure that user services and data traffic are not affected as long as there are still normally functioning edge UPF network elements. When the edge UPF is abnormal, data can also be restored. Lossless migration and high reliability.
图1是基于5G和UPF网元的基本网络结构图，本公开实施例中的中心UPF网元和边缘UPF网元是由图1中的一个标准UPF网元解耦得到的，中心UPF网元与边缘UPF网元部署于会话锚点UPF的位置。Figure 1 is a basic network structure diagram based on 5G and UPF network elements. The central UPF network element and edge UPF network element in the embodiment of the present disclosure are decoupled from a standard UPF network element in Figure 1. The central UPF network element The edge UPF network element is deployed at the location of the session anchor UPF.
图6是本公开实施例中用户面功能UPF网元的网络架构图，如图6所示，所述网络架构中包括：多个轻量可靠UPF和多个中心UPF。Figure 6 is a network architecture diagram of a user plane function UPF network element in an embodiment of the present disclosure. As shown in Figure 6, the network architecture includes: multiple lightweight and reliable UPFs and multiple central UPFs.
在本实施例中，轻量可靠UPF相当于上述实施例中的边缘UPF网元；边缘UPF网元与中心UPF网元之间建立Nx连接，边缘UPF网元与中心UPF网元通过3GPP中规定的N3，N4，N6，N9与核心网内的其他网元进行通信。In this embodiment, the lightweight and reliable UPF is equivalent to the edge UPF network element in the above embodiment; an Nx connection is established between the edge UPF network element and the central UPF network element, and the edge UPF network element and the central UPF network element are specified in 3GPP. N3, N4, N6, and N9 communicate with other network elements within the core network.
在一些实施例中，N4接口位于SMF网元与边缘UPF网元或中心UPF网元之间；N3接口位于5G接入网与边缘UPF之间；N6是内部网络侧与外部网络侧的协议，N6接口位于中心UPF网元与互联网之间，以及边缘UPF网元与园区网之间；N9接口位于边缘UPF网元与其他标准UPF网元之间。In some embodiments, the N4 interface is located between the SMF network element and the edge UPF network element or the central UPF network element; the N3 interface is located between the 5G access network and the edge UPF; N6 is a protocol between the internal network side and the external network side. The N6 interface is located between the central UPF network element and the Internet, and between the edge UPF network element and the campus network; the N9 interface is located between the edge UPF network element and other standard UPF network elements.
在本公开的另一实施例中还提供了一种边缘UPF网元与中心UPF网元部署方法，所述方法包括以下步骤：In another embodiment of the present disclosure, a method for deploying edge UPF network elements and central UPF network elements is also provided. The method includes the following steps:
步骤S1，中心UPF与边缘UPF分开部署；Step S1, center UPF and edge UPF are deployed separately;
步骤S2，中心UPF与边缘UPF建立Nx连接；Step S2, the central UPF establishes Nx connection with the edge UPF;
步骤S3，中心UPF上配置边缘UPF的IP地址池，TEIDU等信息，通过Nx连接下发给边缘UPF；Step S3: Configure the IP address pool, TEIDU and other information of the edge UPF on the central UPF, and deliver them to the edge UPF through the Nx connection;
步骤S4，中心UPF把新增UPF业务配置通过Nx连接下发给边缘UPF； Step S4: The central UPF delivers the new UPF service configuration to the edge UPF through the Nx connection;
步骤S5，中心UPF和边缘UPF之间的信令报文采用PFCP协议通信；Step S5: The signaling messages between the center UPF and the edge UPF are communicated using the PFCP protocol;
步骤S6，中心UPF和边缘UPF之间的业务报文采用隧道协议通信。Step S6: Service packets between the center UPF and the edge UPF are communicated using a tunnel protocol.
在本实施例中，步骤S1中的部署结构具体可以如图6中所示。In this embodiment, the deployment structure in step S1 may be specifically shown in Figure 6 .
图7是本公开实施例中边缘UPF网元与中心UPF网元的Nx信令报文通信接口。Figure 7 is an Nx signaling message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure.
在本实施例中，上述步骤S5中，中心UPF与边缘UPF通过图7中所示的Nx信令报文通信接口进行信令报文通信，Nx信令报文通信接口采用的是PFCP协议。In this embodiment, in the above step S5, the central UPF and the edge UPF communicate with each other through the Nx signaling message communication interface shown in Figure 7. The Nx signaling message communication interface uses the PFCP protocol.
在本实施例中，上述步骤S6中，中心UPF与边缘UPF通过Nx业务报文通信接口进行业务报文通信，Nx业务报文通信接口采用的是隧道协议。示例性的，隧道协议的类型包括但不限于自定义UDP协议隧道、GTP协议隧道、GRE协议隧道等。In this embodiment, in the above-mentioned step S6, the central UPF and the edge UPF communicate with each other through the Nx service message communication interface, and the Nx service message communication interface uses a tunnel protocol. Examples of tunnel protocol types include, but are not limited to, custom UDP protocol tunnels, GTP protocol tunnels, GRE protocol tunnels, etc.
图8是本公开实施例中边缘UPF网元与中心UPF网元的Nx业务报文通信接口。如图8所示，该Nx业务报文通信接口采用的是自定义UDP协议隧道。Figure 8 is an Nx service message communication interface between the edge UPF network element and the central UPF network element in the embodiment of the present disclosure. As shown in Figure 8, the Nx service message communication interface uses a custom UDP protocol tunnel.
在本实施例中，图8中的InnerHead(内部头)采用16字节结构，如下表1所示，具体内容可做调整。In this embodiment, the InnerHead in Figure 8 adopts a 16-byte structure, as shown in Table 1 below, and the specific content can be adjusted.
表1
Table 1
在本实施例中，表1中的InnerType用来表征消息类型。示例性的，自定义的消息类型如下表2所示，但不限于表2。In this embodiment, InnerType in Table 1 is used to characterize the message type. Exemplary, customized message types are shown in Table 2 below, but are not limited to Table 2.
表2
Table 2
图9是本公开另一实施例中边缘UPF与中心UPF的会话及业务流程示意图，如图9所示，该流程包括以下步骤： Figure 9 is a schematic diagram of the session and business process between edge UPF and center UPF in another embodiment of the present disclosure. As shown in Figure 9, the process includes the following steps:
步骤S901，SMF触发建立N4会话流程；Step S901, SMF triggers the establishment of N4 session process;
步骤S902，边缘UPF1收到SMF发送的N4 Session Establishment/Modification/Release Request(N4会话创建/变更/释放请求)；Step S902, edge UPF1 receives the N4 Session Establishment/Modification/Release Request (N4 session creation/modification/release request) sent by SMF;
步骤S903，边缘UPF1发送Session Establishment/Modification/Release Request(会话创建/变更/释放请求)给中心UPF1；Step S903, edge UPF1 sends Session Establishment/Modification/Release Request (session creation/modification/release request) to center UPF1;
步骤S904，中心UPF1完成分配IP地址或接受SMF分配IP地址，分配业务隧道资源等创建/变更/释放操作；Step S904, the center UPF1 completes the creation/change/release operations such as allocating IP addresses or accepting SMF allocation of IP addresses, allocating service tunnel resources, etc.;
步骤S905，中心UPF1发送Session Establishment/Modification/Release Response(会话创建/变更/释放响应)给边缘UPF1；Step S905, the center UPF1 sends a Session Establishment/Modification/Release Response (session creation/modification/release response) to the edge UPF1;
步骤S906，中心UPF1发送Session Context Synchronizing(会话上下文同步)给中心UPF2，完成用户会话信息及策略计费等上下文的同步备份和响应确认；Step S906, the center UPF1 sends Session Context Synchronizing (session context synchronization) to the center UPF2 to complete the synchronization backup and response confirmation of user session information, policy charging and other contexts;
步骤S907，边缘UPF1完成创建/变更/释放N4会话及业务隧道，发送N4 Session Establishment/Modification/Release Response(N4会话创建/变更/释放响应)给SMF；Step S907, edge UPF1 completes the creation/change/release of the N4 session and service tunnel, and sends the N4 Session Establishment/Modification/Release Response (N4 Session Creation/Modification/Release Response) to SMF;
步骤S908，中心UPF1发送FlowContext Establishment/Modification/Release Request(流上下文创建/变更/释放请求)给边缘UPF1，完成用户转发表流表的创建/变更/释放；Step S908, the center UPF1 sends a FlowContext Establishment/Modification/Release Request (flow context creation/change/release request) to the edge UPF1 to complete the creation/change/release of the user forwarding table flow table;
步骤S909，中心UPF1发送Flow Context Synchronizing(流上下文同步)给边缘UPF集群中的UPFn，完成用户转发表流表的创建/变更/释放的信息备份。Step S909, the center UPF1 sends Flow Context Synchronizing (flow context synchronization) to UPFn in the edge UPF cluster to complete the information backup of the creation/change/release of the user forwarding table flow table.
步骤S910，边缘UPF1完成用户IP在本地的路由发布、变更或删除。Step S910: The edge UPF1 completes the local route publishing, change or deletion of the user IP.
步骤S911，边缘UPF1发送Flow Context Establishment/Modification/Release Response(流上下文创建/变更/释放响应)给中心UPF1，完成用户转发表流表的下发确认；Step S911, edge UPF1 sends Flow Context Establishment/Modification/Release Response (flow context creation/modification/release response) to central UPF1 to complete the issuance confirmation of the user forwarding table flow table;
步骤S912，边缘用户进行园区业务流量访问，通过N3接口发送上行流量至边缘UPF1，边缘UPF1根据会话和规则信息，将用户流量通过N6接口发送至园区网；园区网的下行流量同样通过N3接口发送至用户。边缘UPF1并完成本地流量统计和信息上报，完成计费策略等业务信息；Step S912: The edge user accesses campus business traffic and sends the uplink traffic to the edge UPF1 through the N3 interface. The edge UPF1 sends the user traffic to the campus network through the N6 interface based on the session and rule information; the downlink traffic of the campus network is also sent through the N3 interface. to the user. Edge UPF1 completes local traffic statistics and information reporting, and completes business information such as billing policies;
步骤S913，边缘用户进行Internet大网业务流量访问，通过N3接口发送上行流量至边缘UPF1，边缘UPF1根据会话和规则信息，将用户流量通过N9接口发送至中心UPF或其它核心网UPF；Internet网的下行流量同样通过N9接口接收、并通过N3接口发送至用户。边缘UPF1完成流量统计和信息上报，完成计费策略等业务信息。Step S913: The edge user accesses the Internet large network service traffic and sends the uplink traffic to the edge UPF1 through the N3 interface. The edge UPF1 sends the user traffic to the central UPF or other core network UPF through the N9 interface based on the session and rule information; the Internet network Downstream traffic is also received through the N9 interface and sent to users through the N3 interface. Edge UPF1 completes traffic statistics and information reporting, and completes business information such as charging policies.
图10是本公开另一实施例中边缘UPF异常场景下的容灾流程示意图。Figure 10 is a schematic diagram of the disaster recovery process in an edge UPF abnormal scenario in another embodiment of the present disclosure.
在本实施例中，在边缘UPF网元及中心UPF网元正常的场景下，用户的会话及业务流程同上述步骤S901至步骤S913一致。In this embodiment, in a scenario where the edge UPF network element and the central UPF network element are normal, the user's session and business process are consistent with the above steps S901 to S913.
在本实施例中，SMF网元或中心UPF网元会对边缘UPF的工作状态进行检测，在检测到边缘UPF1异常的情况下，同步触发选择边缘UPFn作为用户备份UPF。In this embodiment, the SMF network element or the central UPF network element detects the working status of the edge UPF. When an abnormality of edge UPF1 is detected, edge UPFn is synchronously triggered to be selected as the user backup UPF.
在本实施例中，如图10所示，边缘UPF异常场景下的容灾流程包括以下步骤：In this embodiment, as shown in FIG10 , the disaster recovery process in the edge UPF abnormal scenario includes the following steps:
步骤S1001，SMF触发建立N4会话流程；Step S1001, SMF triggers the establishment of N4 session process;
步骤S1002，边缘UPFn收到SMF发送的N4 Session Establishment/Modification/Release Request(N4会话创建/变更/释放请求)；Step S1002, the edge UPFn receives the N4 Session Establishment/Modification/Release Request (N4 Session Creation/Modification/Release Request) sent by SMF;
步骤S1003，边缘UPFn发送Session Establishment/Modification/Release Request (会话创建/变更/释放请求)给中心UPF1；Step S1003, edge UPFn sends Session Establishment/Modification/Release Request (Session creation/change/release request) to center UPF1;
步骤S1004，中心UPF1完成分配IP地址或接受SMF分配IP地址，分配业务隧道资源等创建/变更/释放操作；Step S1004, the center UPF1 completes the creation/change/release operations such as allocating IP addresses or accepting SMF allocation of IP addresses, allocating service tunnel resources, etc.;
步骤S1005，中心UPF1发送Session Establishment/Modification/Release Response(会话创建/变更/释放响应)给边缘UPFn；Step S1005, the center UPF1 sends a Session Establishment/Modification/Release Response (session creation/modification/release response) to the edge UPFn;
步骤S1006，边缘UPFn完成创建/变更/释放N4会话及业务隧道，发送N4 Session Establishment/Modification/Release Response(N4会话创建/变更/释放响应)给SMF；Step S1006, the edge UPFn completes the creation/change/release of the N4 session and service tunnel, and sends the N4 Session Establishment/Modification/Release Response (N4 Session Creation/Modification/Release Response) to the SMF;
步骤S1007，中心UPF1发送Session Context Synchronizing(会话上下文同步)给中心UPF2，完成用户会话信息及策略计费等上下文的同步备份和响应确认；Step S1007, the center UPF1 sends Session Context Synchronizing (session context synchronization) to the center UPF2 to complete the synchronization backup and response confirmation of user session information, policy charging and other contexts;
步骤S1008，中心UPF1发送Flow Context Establishment/Modification/Release Request(流上下文创建/变更/释放请求)给边缘UPFn，完成用户转发表流表的创建/变更/释放；Step S1008, the center UPF1 sends a Flow Context Establishment/Modification/Release Request (flow context creation/change/release request) to the edge UPFn to complete the creation/change/release of the user forwarding table flow table;
步骤S1009，边缘UPFn完成用户IP在本地的路由发布、变更或删除；Step S1009: The edge UPFn completes the local route publishing, change or deletion of the user IP;
步骤S1010，边缘UPFn发送Flow Context Establishment/Modification/Release Response(流上下文创建/变更/释放响应)给中心UPF1，完成用户转发表流表的下发确认；Step S1010, the edge UPFn sends the Flow Context Establishment/Modification/Release Response (flow context creation/modification/release response) to the center UPF1 to complete the issuance confirmation of the user forwarding table flow table;
步骤S1011，边缘用户进行园区业务流量访问，通过N3接口发送上行流量至边缘UPFn，边缘UPFn根据会话和规则信息，将用户流量通过N6接口发送至园区网；园区网的下行流量同样通过N3接口发送至用户。边缘UPFn完成本地流量统计和信息上报，完成计费策略等业务信息；Step S1011: The edge user accesses campus business traffic and sends uplink traffic to the edge UPFn through the N3 interface. The edge UPFn sends the user traffic to the campus network through the N6 interface based on the session and rule information; the downlink traffic of the campus network is also sent through the N3 interface. to the user. The edge UPFn completes local traffic statistics and information reporting, and completes business information such as charging policies;
步骤S1012，边缘用户进行Internet大网业务流量访问，通过N3接口发送上行流量至边缘UPFn，边缘UPFn根据会话和规则信息，将用户流量通过N9接口发送至中心UPF或其它核心网UPF；Internet网的下行流量同样通过N9接口接收、并通过N3接口发送至用户。边缘UPFn完成流量统计和信息上报，完成计费策略等业务信息。Step S1012: The edge user accesses Internet large network business traffic and sends uplink traffic to the edge UPFn through the N3 interface. The edge UPFn sends the user traffic to the central UPF or other core network UPF through the N9 interface based on the session and rule information; the Internet network Downstream traffic is also received through the N9 interface and sent to users through the N3 interface. The edge UPFn completes traffic statistics and information reporting, and completes business information such as charging policies.
在本实施例中，在步骤S1009之后，所述方法还包括，中心UPF1发送Flow Context Synchronizing(流上下文同步)给边缘UPF集群中的其他边缘UPF，完成用户转发表流表的创建/变更/释放的信息备份。In this embodiment, after step S1009, the method also includes: the center UPF1 sends Flow Context Synchronizing (flow context synchronization) to other edge UPFs in the edge UPF cluster to complete the creation/change/release of the user forwarding table flow table. information backup.
图11是本公开另一实施例中中心UPF异常场景下的容灾流程示意图。Figure 11 is a schematic diagram of the disaster recovery process in a central UPF abnormal scenario in another embodiment of the present disclosure.
在本实施例中，在边缘UPF网元及中心UPF网元正常的场景下，用户的会话及业务流程同上述步骤S901至步骤S913一致，当边缘UPF检测到中心UPF异常时，触发选择中心UPF2作为主用中心UPF。In this embodiment, in the scenario where the edge UPF network element and the center UPF network element are normal, the user's session and business process are consistent with the above steps S901 to step S913. When the edge UPF detects that the center UPF is abnormal, it triggers the selection of center UPF2 As the primary center UPF.
步骤S1101，SMF触发建立N4会话流程；Step S1101, SMF triggers the establishment of N4 session process;
步骤S1102，边缘UPF1收到SMF发送的N4 Session Establishment/Modification/Release Request(N4会话创建/变更/释放请求)；Step S1102, edge UPF1 receives the N4 Session Establishment/Modification/Release Request (N4 Session Creation/Modification/Release Request) sent by SMF;
步骤S1103，边缘UPF1发送Session Establishment/Modification/Release Request(会话创建/变更/释放请求)给中心UPF2；Step S1103, edge UPF1 sends Session Establishment/Modification/Release Request (session creation/modification/release request) to center UPF2;
步骤S1104，中心UPF2启用本地备份信息，分配IP地址或接受SMF分配IP地址，分配业务隧道资源等创建/变更/释放操作；Step S1104, the center UPF2 enables local backup information, allocates IP addresses or accepts SMF allocation of IP addresses, allocates service tunnel resources and other creation/change/release operations;
步骤S1105，中心UPF2发送Session Establishment/Modification/Release Response (会话创建/变更/释放响应)给边缘UPF1；Step S1105, the center UPF2 sends Session Establishment/Modification/Release Response (session create/change/release response) to edge UPF1;
步骤S1106，边缘UPF1完成创建/变更/释放N4会话及业务隧道，发送N4 Session Establishment/Modification/Release Response(N4会话创建/变更/释放响应)给SMF；Step S1106, edge UPF1 completes the creation/change/release of the N4 session and service tunnel, and sends the N4 Session Establishment/Modification/Release Response (N4 Session Creation/Modification/Release Response) to SMF;
步骤S1107，中心UPF2发送Flow Context Establishment/Modification/Release Request(流上下文创建/变更/释放请求)给边缘UPF1，完成用户转发表流表的创建/变更/释放；Step S1107, the center UPF2 sends a Flow Context Establishment/Modification/Release Request (flow context creation/change/release request) to the edge UPF1 to complete the creation/change/release of the user forwarding table flow table;
步骤S1108，中心UPF2发送Flow Context Synchronizing(流上下文同步)给边缘UPF集群中的UPFn，完成用户转发表流表的创建/变更/释放的信息备份。Step S1108, the center UPF2 sends Flow Context Synchronizing (flow context synchronization) to UPFn in the edge UPF cluster to complete the information backup of the creation/change/release of the user forwarding table flow table.
步骤S1109，边缘UPF1完成用户IP在本地的路由发布、变更或删除；Step S1109: Edge UPF1 completes the local route publishing, change or deletion of the user IP;
步骤S1110，边缘UPF1发送Flow Context Establishment/Modification/Release Response(流上下文创建/变更/释放响应)给中心UPF2，完成用户转发表流表的下发确认；Step S1110, edge UPF1 sends Flow Context Establishment/Modification/Release Response (flow context creation/modification/release response) to center UPF2 to complete the issuance confirmation of the user forwarding table flow table;
步骤S1111，边缘用户进行园区业务流量访问，通过N3接口发送上行流量至边缘UPF1，边缘UPF1根据会话和规则信息，将用户流量通过N6接口发送至园区网；园区网的下行流量同样通过N3接口发送至用户。边缘UPF1并完成本地流量统计和信息上报，完成计费策略等业务信息；Step S1111: Edge users access campus business traffic and send uplink traffic to edge UPF1 through the N3 interface. Edge UPF1 sends user traffic to the campus network through the N6 interface based on session and rule information; downlink traffic of the campus network is also sent through the N3 interface. to the user. Edge UPF1 completes local traffic statistics and information reporting, and completes business information such as billing policies;
步骤S1112，边缘用户进行Internet大网业务流量访问，通过N3接口发送上行流量至边缘UPF1，边缘UPF1根据会话和规则信息，将用户流量通过N9接口发送至中心UPF2或其它核心网UPF；Internet网的下行流量同样通过N9接口接收、并通过N3接口发送至用户。边缘UPF1完成流量统计和信息上报，完成计费策略等业务信息。Step S1112: The edge user accesses the Internet large network business traffic and sends the uplink traffic to the edge UPF1 through the N3 interface. The edge UPF1 sends the user traffic to the center UPF2 or other core network UPF through the N9 interface based on the session and rule information; the Internet network Downstream traffic is also received through the N9 interface and sent to users through the N3 interface. Edge UPF1 completes traffic statistics and information reporting, and completes business information such as charging policies.
根据本公开实施例的另一方面，还提供了一种信令处理***，图12是根据本公开实施例的信令处理***的框图，所述***包括：中心UPF网元1202与边缘UPF网元1204，其中，所述中心UPF网元1202与所述边缘UPF网元1204是UPF网元解耦得到的，且所述中心UPF网元1202与所述边缘UPF网元1204分开部署；According to another aspect of the embodiment of the present disclosure, a signaling processing system is also provided. Figure 12 is a block diagram of the signaling processing system according to the embodiment of the present disclosure. The system includes: a central UPF network element 1202 and an edge UPF network. Element 1204, wherein the center UPF network element 1202 and the edge UPF network element 1204 are obtained by decoupling UPF network elements, and the center UPF network element 1202 and the edge UPF network element 1204 are deployed separately;
所述边缘UPF网元1204，用于接收会话管理功能SMF网元发送的会话请求信令，通过Nx连接将所述会话请求信令发送给所述中心UPF网元；The edge UPF network element 1204 is configured to receive the session request signaling sent by the session management function SMF network element, and send the session request signaling to the central UPF network element through the Nx connection;
所述中心UPF网元1202，用于根据所述会话请求信令确定所述边缘UPF网元的IP地址和业务隧道资源，通过所述Nx连接将会话响应信令发送给所述边缘UPF网元，其中，所述会话响应信令中包含所述IP地址和所述业务隧道资源；The central UPF network element 1202 is configured to determine the IP address and service tunnel resources of the edge UPF network element according to the session request signaling, and send session response signaling to the edge UPF network element through the Nx connection. , wherein the session response signaling includes the IP address and the service tunnel resource;
所述边缘UPF网元1204，还用于将所述会话响应信令转发给所述SMF网元。The edge UPF network element 1204 is also used to forward the session response signaling to the SMF network element.
在本实施例中，所述边缘UPF网元1202与所述中心UPF网元之间通过Nx连接与所述边缘UPF网元进行信令报文通信和业务报文通信。In this embodiment, the edge UPF network element 1202 communicates with the center UPF network element through Nx connection for signaling message communication and service message communication with the edge UPF network element.
示例性的，所述边缘UPF网元1202与所述中心UPF网元根据数据包转发控制协议PFCP协议在所述Nx连接中进行所述信令报文通信；和/或根据隧道协议在所述Nx连接中进行所述业务报文通信，其中，所述隧道协议包括：用户数据报协议UDP、GPRS隧道协议GTP或通用路由封装GRE协议。Exemplarily, the edge UPF network element 1202 and the central UPF network element communicate with each other in the Nx connection according to the packet forwarding control protocol PFCP protocol; and/or in the Nx connection according to the tunnel protocol. The service message communication is performed in the Nx connection, wherein the tunnel protocol includes: User Datagram Protocol UDP, GPRS Tunnel Protocol GTP or General Routing Encapsulation GRE protocol.
本公开的实施例还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序，其中，该计算机程序被处理器运行时执行上述任一项方法实施例中的步骤。Embodiments of the present disclosure also provide a computer-readable storage medium that stores a computer program, wherein the computer program executes the steps in any of the above method embodiments when run by a processor.
在一个示例性实施例中，上述计算机可读存储介质可以包括但不限于：U盘、只读存储 器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储计算机程序的介质。In an exemplary embodiment, the computer-readable storage medium may include but is not limited to: USB flash drive, read-only storage medium Various media that can store computer programs include Read-Only Memory (ROM for short), Random Access Memory (RAM for short), mobile hard disk, magnetic disk or optical disk.
本公开的实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。Embodiments of the present disclosure also provide an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.
在一个示例性实施例中，上述电子装置还可以包括传输设备以及输入输出设备，其中，该传输设备和上述处理器连接，该输入输出设备和上述处理器连接。In an exemplary embodiment, the above-mentioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the above-mentioned processor, and the input-output device is connected to the above-mentioned processor.
本实施例中的具体示例可以参考上述实施例及示例性实施方式中所描述的示例，本实施例在此不再赘述。For specific examples in this embodiment, reference may be made to the examples described in the above-mentioned embodiments and exemplary implementations, and details will not be described again in this embodiment.
显然，本领域的技术人员应该明白，上述的本公开的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本公开不限制于任何特定的硬件和软件结合。Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present disclosure can be implemented using general-purpose computing devices, and they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices. They may be implemented in program code executable by a computing device, such that they may be stored in a storage device for execution by the computing device, and in some cases may be executed in a sequence different from that shown herein. Or the described steps can be implemented by making them into individual integrated circuit modules respectively, or by making multiple modules or steps among them into a single integrated circuit module. As such, the present disclosure is not limited to any specific combination of hardware and software.
以上所述仅为本公开的示例性实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。 The above are only exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the principles of this disclosure shall be included in the protection scope of this disclosure.

Claims (22)

  1. 一种用户面功能UPF网元部署方法，所述方法包括：A user plane function UPF network element deployment method, the method includes:
    将用户面功能UPF网元解耦为中心UPF网元与边缘UPF网元；Decouple user plane functional UPF network elements into central UPF network elements and edge UPF network elements;
    将所述中心UPF网元与所述边缘UPF网元分开部署；Deploy the central UPF network element and the edge UPF network element separately;
    在所述中心UPF网元与所述边缘UPF网元之间建立Nx连接，其中，所述中心UPF网元用于通过所述Nx连接与所述边缘UPF网元进行信令报文通信和业务报文通信。An Nx connection is established between the central UPF network element and the edge UPF network element, wherein the central UPF network element is used to communicate signaling messages and services with the edge UPF network element through the Nx connection. Message communication.
  2. 根据权利要求1所述的方法，其中，所述方法还包括：The method of claim 1, further comprising:
    通过所述中心UPF网元配置所述边缘UPF网元的IP地址池，其中，所述IP地址池用于指示园区网内的IP地址；Configure the IP address pool of the edge UPF network element through the central UPF network element, where the IP address pool is used to indicate the IP address in the campus network;
    通过所述Nx连接将所述IP地址池下发给所述边缘UPF网元。The IP address pool is delivered to the edge UPF network element through the Nx connection.
  3. 根据权利要求1所述的方法，其中，所述方法还包括：The method of claim 1, further comprising:
    根据数据包转发控制协议PFCP协议在所述Nx连接中进行所述信令报文通信；和/或The signaling message communication is performed in the Nx connection according to the Data Packet Forwarding Control Protocol PFCP protocol; and/or
    根据隧道协议在所述Nx连接中进行所述业务报文通信，其中，所述隧道协议包括：用户数据报协议UDP、通用无线分组业务GPRS隧道协议GTP或通用路由封装GRE协议。The service message communication is performed in the Nx connection according to a tunnel protocol, wherein the tunnel protocol includes: User Datagram Protocol UDP, General Wireless Packet Service GPRS Tunnel Protocol GTP or General Routing Encapsulation GRE protocol.
  4. 根据权利要求1所述的方法，其中，所述方法还包括：The method of claim 1, further comprising:
    部署至少一个备用中心UPF网元和至少一个备用边缘UPF网元；Deploy at least one backup central UPF network element and at least one backup edge UPF network element;
    在所述备用中心UPF网元与所述边缘UPF网元之间建立所述Nx连接；Establish the Nx connection between the backup center UPF network element and the edge UPF network element;
    在所述备用中心UPF网元与所述中心UPF网元之间建立所述Nx连接，其中，所述中心UPF网元用于通过所述Nx连接将会话上下文同步给所述备用中心UPF网元；The Nx connection is established between the backup central UPF network element and the central UPF network element, wherein the central UPF network element is used to synchronize session context to the backup central UPF network element through the Nx connection. ;
    在所述备用边缘UPF网元与所述中心UPF网元之间建立所述Nx连接，其中，所述中心UPF网元还用于通过所述Nx连接将流上下文同步给所述备用边缘UPF网元。The Nx connection is established between the backup edge UPF network element and the central UPF network element, wherein the central UPF network element is also used to synchronize flow context to the backup edge UPF network through the Nx connection. Yuan.
  5. 一种信令处理方法，应用于边缘UPF网元，所述方法包括：A signaling processing method, applied to edge UPF network elements, the method includes:
    接收会话管理功能SMF网元发送的会话请求信令；Receive session request signaling sent by the session management function SMF network element;
    通过Nx连接将所述会话请求信令发送给中心用户面功能UPF网元，其中，所述中心UPF网元与所述边缘UPF网元是UPF网元解耦得到的，且所述中心UPF网元与所述边缘UPF网元分开部署；The session request signaling is sent to the central user plane function UPF network element through the Nx connection, wherein the central UPF network element and the edge UPF network element are decoupled from the UPF network element, and the central UPF network element The element is deployed separately from the edge UPF network element;
    通过所述Nx连接接收所述中心UPF网元在处理所述会话请求信令后返回的会话响应信令；Receive, through the Nx connection, the session response signaling returned by the central UPF network element after processing the session request signaling;
    将所述会话响应信令转发给所述SMF网元。Forward the session response signaling to the SMF network element.
  6. 根据权利要求5所述的方法，其中，在接收所述会话响应信令之后，所述方法还包括：The method of claim 5, wherein after receiving the session response signaling, the method further includes:
    根据所述会话响应信令对会话和业务隧道进行创建、变更或释放处理，其中，所述会话响应信令包括：会话创建响应、会话变更响应或会话释放响应；Create, change or release sessions and service tunnels according to the session response signaling, where the session response signaling includes: session creation response, session change response or session release response;
    所述会话响应信令中包含边缘UPF网元的IP地址和业务隧道资源，其中，所述边缘UPF网元的IP地址是所述SMF网元或所述中心UPF网元分配的，所述业务隧道资源是所述中心UPF网元分配的。The session response signaling contains the IP address and service tunnel resources of the edge UPF network element, where the IP address of the edge UPF network element is allocated by the SMF network element or the central UPF network element, and the service Tunnel resources are allocated by the central UPF network element.
  7. 根据权利要求5所述的方法，其中，在将所述会话响应信令转发给所述SMF网元之后，所述方法还包括：The method according to claim 5, wherein after forwarding the session response signaling to the SMF network element, the method further includes:
    通过所述Nx连接接收所述中心UPF网元发送的流上下文请求，其中，所述流上下文请求包括：流上下文创建请求、流上下文变更请求或流上下文释放请求； Receive a flow context request sent by the central UPF network element through the Nx connection, where the flow context request includes: a flow context creation request, a flow context change request or a flow context release request;
    根据所述流上下文请求对转发表或流表进行创建、变更或释放处理；Create, change or release the forwarding table or flow table according to the flow context request;
    根据所述流上下文请求对IP地址池的路由表进行发布、变更或删除处理，其中，所述IP地址池用于指示园区网内的IP地址；Publish, change or delete the routing table of the IP address pool according to the flow context request, where the IP address pool is used to indicate IP addresses in the campus network;
    通过所述Nx连接将流上下文响应发送给所述中心UPF网元，其中，所述流上下文响应包括：流上下文创建响应、流上下文变更响应或流上下文释放响应。A flow context response is sent to the central UPF network element through the Nx connection, where the flow context response includes: a flow context creation response, a flow context change response or a flow context release response.
  8. 根据权利要求7所述的方法，其中，在通过Nx连接将流上下文响应发送给所述中心UPF网元之后，所述方法还包括：The method of claim 7, wherein after sending the flow context response to the central UPF network element through the Nx connection, the method further includes:
    接收边缘用户发送的上行流量；Receive uplink traffic sent by edge users;
    判断所述上行流量要访问的IP地址是否在所述IP地址池内；Determine whether the IP address to be accessed by the upstream traffic is in the IP address pool;
    在判断结果为是的情况下，将所述上行流量确定为第一上行流量，其中，所述第一上行流量用于在园区网内进行业务访问；If the judgment result is yes, determine the upstream traffic as the first upstream traffic, wherein the first upstream traffic is used for business access in the campus network;
    在判断结果为否的情况下，将所述上行流量确定为第二上行流量，其中，所述第二上行流量用于对园区网以外的互联网进行业务访问；If the judgment result is no, determine the upstream traffic as second upstream traffic, wherein the second upstream traffic is used for business access to the Internet outside the campus network;
    将业务访问结果发送给所述边缘用户。Send the service access results to the edge users.
  9. 根据权利要求8所述的方法，其中，在将业务访问结果发送给所述边缘用户之前，所述方法还包括：The method according to claim 8, wherein before sending the service access result to the edge user, the method further includes:
    根据所述转发表或流表将所述第一上行流量发送给园区网，并接收所述园区网返回的第一下行流量，其中，所述第一下行流量为所述园区网的业务访问结果；和/或Send the first uplink traffic to the campus network according to the forwarding table or flow table, and receive the first downlink traffic returned by the campus network, where the first downlink traffic is a service of the campus network Access results; and/or
    将所述第二上行流量发送给所述中心UPF网元或核心网UPF网元，并接收所述中心UPF网元或所述核心网UPF网元发送的第二下行流量，其中，所述第二下行流量为所述互联网的业务访问结果。The second uplink traffic is sent to the center UPF network element or the core network UPF network element, and the second downlink traffic sent by the center UPF network element or the core network UPF network element is received, wherein the The second downlink traffic is the result of business access to the Internet.
  10. 根据权利要求9所述的方法，其中，所述方法还包括：The method of claim 9, further comprising:
    对所述园区网和所述互联网内的业务访问分别进行流量统计，得到流量统计信息；Perform traffic statistics on business access in the campus network and the Internet respectively to obtain traffic statistics information;
    通过所述Nx连接将所述流量统计信息上报给所述中心UPF网元；Report the traffic statistics information to the central UPF network element through the Nx connection;
    根据所述流量统计信息进行策略控制和计费。Policy control and billing are performed based on the traffic statistics information.
  11. 根据权利要求7所述的方法，其中，所述方法还包括：The method of claim 7, further comprising:
    根据数据包转发控制协议PFCP协议发送所述会话请求信令，并根据所述PFCP协议接收所述会话响应信令；和/或Send the session request signaling according to the Data Packet Forwarding Control Protocol PFCP protocol, and receive the session response signaling according to the PFCP protocol; and/or
    根据隧道协议接收所述流上下文请求，并根据所述隧道协议发送所述流上下文响应，其中，所述隧道协议包括：用户数据报协议UDP、GPRS隧道协议GTP或通用路由封装GRE协议。The flow context request is received according to a tunneling protocol, and the flow context response is sent according to the tunneling protocol, wherein the tunneling protocol includes: User Datagram Protocol UDP, GPRS Tunneling Protocol GTP or General Routing Encapsulation GRE protocol.
  12. 根据权利要求7至11任一项中所述的方法，其中，所述方法还包括：The method according to any one of claims 7 to 11, wherein the method further includes:
    检测所述中心UPF网元的工作状态是否异常，其中，所述中心UPF网元为主用中心UPF网元，所述主用中心UPF网元对应至少一个备用中心UPF网元；Detect whether the working status of the central UPF network element is abnormal, wherein the central UPF network element is the main central UPF network element, and the main central UPF network element corresponds to at least one backup central UPF network element;
    在检测结果为是的情况下，将所述至少一个备用中心UPF网元中的一个备用中心UPF网元设置为主用中心UPF网元。If the detection result is yes, one of the at least one backup central UPF network element is set as the main central UPF network element.
  13. 一种信令处理方法，应用于中心UPF网元，所述方法包括：A signaling processing method, applied to central UPF network elements, the method includes:
    通过Nx连接接收边缘UPF网元发送的会话请求信令，其中，所述会话请求信令是所述边缘UPF网元从会话管理功能SMF网元接收的，所述中心UPF网元与所述边缘UPF网元是UPF网元解耦得到的，且所述中心UPF网元与所述边缘UPF网元分开部署； Receive session request signaling sent by the edge UPF network element through the Nx connection, wherein the session request signaling is received by the edge UPF network element from the session management function SMF network element, and the central UPF network element and the edge The UPF network element is obtained by decoupling the UPF network element, and the central UPF network element and the edge UPF network element are deployed separately;
    根据所述会话请求信令确定所述边缘UPF网元的IP地址和业务隧道资源；Determine the IP address and service tunnel resources of the edge UPF network element according to the session request signaling;
    通过Nx连接将会话响应信令发送给所述边缘UPF网元，其中，所述会话响应信令中包含所述IP地址和所述业务隧道资源。Session response signaling is sent to the edge UPF network element through the Nx connection, where the session response signaling includes the IP address and the service tunnel resource.
  14. 根据权利要求13所述的方法，其中，根据所述会话请求信令确定所述边缘UPF网元的IP地址和业务隧道资源，包括：The method according to claim 13, wherein determining the IP address and service tunnel resources of the edge UPF network element according to the session request signaling includes:
    根据所述会话请求信令将所述IP地址分配给所述边缘UPF网元，或者，对所述会话请求信令中所述SMF网元分配的所述IP地址进行确认，其中，所述会话请求信令包括：会话创建请求、会话变更请求或会话释放请求；Allocate the IP address to the edge UPF network element according to the session request signaling, or confirm the IP address allocated by the SMF network element in the session request signaling, wherein the session Request signaling includes: session creation request, session change request or session release request;
    根据所述会话请求信令将所述业务隧道资源分配给所述边缘UPF网元。The service tunnel resource is allocated to the edge UPF network element according to the session request signaling.
  15. 根据权利要求13所述的方法，其中，在通过Nx连接将会话响应信令发送给所述边缘UPF网元之后，所述方法还包括：The method of claim 13, wherein after sending session response signaling to the edge UPF network element through the Nx connection, the method further includes:
    通过Nx连接将流上下文请求发送给所述边缘UPF网元，其中，所述流上下文请求包括：流上下文创建请求、流上下文变更请求或流上下文释放请求；Send the flow context request to the edge UPF network element through the Nx connection, where the flow context request includes: a flow context creation request, a flow context change request or a flow context release request;
    通过Nx连接接收所述边缘UPF网元发送的流上下文响应，其中，所述流上下文响应是所述边缘UPF网元根据所述流上下文请求对转发表或流表进行创建、变更或释放处理之后，且对IP地址池的路由表进行发布、变更或删除处理之后发送的。Receive the flow context response sent by the edge UPF network element through the Nx connection, wherein the flow context response is after the edge UPF network element creates, changes or releases the forwarding table or flow table according to the flow context request. , and is sent after publishing, changing or deleting the routing table of the IP address pool.
  16. 根据权利要求15所述的方法，其中，在通过Nx连接接收所述边缘UPF网元发送的流上下文响应之后，所述方法还包括：The method of claim 15, wherein after receiving the flow context response sent by the edge UPF network element through the Nx connection, the method further includes:
    接收所述边缘UPF网元发送的第二上行流量，其中，所述第二上行流量用于对园区网以外的互联网进行业务访问，所述第二上行流量要访问的IP地址不在所述IP地址池内；Receive the second upstream traffic sent by the edge UPF network element, wherein the second upstream traffic is used for business access to the Internet outside the campus network, and the IP address to be accessed by the second upstream traffic is not in the IP address. inside the pool;
    将所述第二上行流量发送给所述互联网；Send the second uplink traffic to the Internet;
    接收所述互联网返回的第二下行流量，其中，所述第二下行流量为所述互联网的业务访问结果；Receive the second downlink traffic returned by the Internet, where the second downlink traffic is the service access result of the Internet;
    将所述第二下行流量发送给所述边缘UPF网元。Send the second downlink traffic to the edge UPF network element.
  17. 根据权利要求16所述的方法，其中，在将所述第二下行流量发送给所述边缘UPF网元之后，所述方法还包括：The method according to claim 16, wherein after sending the second downlink traffic to the edge UPF network element, the method further includes:
    通过Nx连接接收所述边缘UPF网元上报的流量统计信息，其中，所述流量统计信息是所述边缘UPF网元根据所述园区网和所述互联网内的业务访问分别进行流量统计得到的。The traffic statistics information reported by the edge UPF network element is received through the Nx connection, where the traffic statistics information is obtained by the edge UPF network element performing traffic statistics based on business access in the campus network and the Internet respectively.
  18. 根据权利要求15所述的方法，其中，所述方法还包括：The method of claim 15, further comprising:
    根据数据包转发控制协议PFCP协议接收所述会话请求信令，并根据所述PFCP协议发送所述会话响应信令；和/或Receive the session request signaling according to the Data Packet Forwarding Control Protocol PFCP protocol, and send the session response signaling according to the PFCP protocol; and/or
    根据隧道协议发送所述流上下文请求，并根据所述隧道协议接收所述流上下文响应，其中，所述隧道协议包括：用户数据报协议UDP、GPRS隧道协议GTP或通用路由封装GRE协议。The flow context request is sent according to a tunneling protocol, and the flow context response is received according to the tunneling protocol, wherein the tunneling protocol includes: User Datagram Protocol UDP, GPRS Tunneling Protocol GTP or General Routing Encapsulation GRE protocol.
  19. 根据权利要求13至18任一项中所述的方法，其中，所述方法还包括：The method according to any one of claims 13 to 18, wherein the method further comprises:
    检测所述边缘UPF网元的工作状态是否异常，其中，所述边缘UPF网元为主用边缘UPF网元，所述主用边缘UPF网元对应至少一个备用边缘UPF网元；Detect whether the working status of the edge UPF network element is abnormal, wherein the edge UPF network element is the main edge UPF network element, and the main edge UPF network element corresponds to at least one backup edge UPF network element;
    在检测结果为是的情况下，将所述至少一个备用边缘UPF网元中的一个备用边缘UPF网元设置为主用边缘UPF网元。If the detection result is yes, one of the at least one backup edge UPF network element is set as the main edge UPF network element.
  20. 一种信令处理***，所述***包括：中心UPF网元与边缘UPF网元，其中，所述中心 UPF网元与所述边缘UPF网元是UPF网元解耦得到的，且所述中心UPF网元与所述边缘UPF网元分开部署；A signaling processing system, the system includes: a central UPF network element and an edge UPF network element, wherein the center The UPF network element and the edge UPF network element are decoupled from the UPF network element, and the center UPF network element and the edge UPF network element are deployed separately;
    所述边缘UPF网元，用于接收会话管理功能SMF网元发送的会话请求信令，通过Nx连接将所述会话请求信令发送给所述中心UPF网元；The edge UPF network element is used to receive the session request signaling sent by the session management function SMF network element, and send the session request signaling to the central UPF network element through the Nx connection;
    所述中心UPF网元，用于根据所述会话请求信令确定所述边缘UPF网元的IP地址和业务隧道资源，通过所述Nx连接将会话响应信令发送给所述边缘UPF网元，其中，所述会话响应信令中包含所述IP地址和所述业务隧道资源；The central UPF network element is configured to determine the IP address and service tunnel resources of the edge UPF network element according to the session request signaling, and send session response signaling to the edge UPF network element through the Nx connection, Wherein, the session response signaling includes the IP address and the service tunnel resource;
    所述边缘UPF网元，还用于将所述会话响应信令转发给所述SMF网元。The edge UPF network element is also used to forward the session response signaling to the SMF network element.
  21. 一种计算机可读的存储介质，所述存储介质中存储有计算机程序，其中，所述计算机程序被处理器运行时执行所述权利要求1至4或5至12或13至19任一项中所述的方法。A computer-readable storage medium having a computer program stored in the storage medium, wherein the computer program executes any one of claims 1 to 4 or 5 to 12 or 13 to 19 when run by a processor. the method described.
  22. 一种电子装置，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以执行所述权利要求1至4或5至12或13至19任一项中所述的方法。 An electronic device includes a memory and a processor, a computer program is stored in the memory, and the processor is configured to run the computer program to execute any of claims 1 to 4 or 5 to 12 or 13 to 19. The method described in one.
PCT/CN2023/113859 2022-09-15 2023-08-18 User plane function (upf) network element deployment method, signaling processing method, and system WO2024055813A1 (en)

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