WO2022062071A1 - Procédé et système de communication entre un réseau mec et un réseau central multi-opérateur - Google Patents

Procédé et système de communication entre un réseau mec et un réseau central multi-opérateur Download PDF

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Publication number
WO2022062071A1
WO2022062071A1 PCT/CN2020/125642 CN2020125642W WO2022062071A1 WO 2022062071 A1 WO2022062071 A1 WO 2022062071A1 CN 2020125642 W CN2020125642 W CN 2020125642W WO 2022062071 A1 WO2022062071 A1 WO 2022062071A1
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mec
policy
router
upf
control platform
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PCT/CN2020/125642
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English (en)
Chinese (zh)
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尤建洁
朱泓艺
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网络通信与安全紫金山实验室
上海宽带技术及应用工程研究中心
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Publication of WO2022062071A1 publication Critical patent/WO2022062071A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a communication method and system between an MEC and a multi-operator core network.
  • 5G 5th generation mobile networks or 5th generation wireless systems, 5th-Generation, fifth-generation mobile communication technology
  • 3GPP 3rd Generation Partnership Project
  • eMBB Enhanced Mobile Broadband
  • URLLC Ultra-reliable and Low Latency Communications
  • ultra-reliable and low-latency Communication ultra-reliable and low-latency Communication
  • mMTC Massive Machine Type Communication
  • the eMBB scenario provides high-traffic mobile broadband services, such as high-speed download, high-definition video, etc., which puts a huge pressure on the wireless backhaul network, which requires the service to sink to the network edge as much as possible to realize the local offload of services;
  • the URLLC scenario provides ultra-reliable and ultra-low-latency communication, such as unmanned driving, industrial control, etc., which also needs to sink services to the network edge to reduce the network delay caused by network transmission.
  • MEC Multi-Access Edge Computing, edge computing
  • the 5G core network is separated from the UP (User plane, user plane) through the CP (control plane, control plane), and the UPF (User Plane Function, user plane network element) can be flexibly deployed to the network edge, while the PCF (Policy Control Function) , policy control) and SMF (Session Management Function, session management) and other control plane functions can be deployed centrally.
  • the 5G core network selects a UPF close to the UE and performs flow control from the UPF to the local data network through the N6 interface.
  • Embodiments of the present invention provide a communication method and system between an MEC and a multi-operator core network, which can realize information exchange between the MEC system and the 5G core networks of different operators.
  • an embodiment of the present application provides a communication method between an MEC and a multi-operator core network, including:
  • Step 1 the SMF sends a policy request message to the MEC network control platform, wherein the policy request message includes policy rules and user information of the service flow, and the policy request message may also include data offloading requirements;
  • Step 2 the MEC After the network control platform completes local decision-making, it issues policy rules to the MEC Router; step 3, after the MEC Router completes policy execution, it returns a response to the MEC network control platform; step 4, the MEC network control platform replies to the SMF.
  • the first step includes: the SMF of the network element of the operator's 5G core network sends the policy request message to the UPF-P of the MEC network control platform, where the policy request message includes: policy rules for service flows and user information.
  • the method further includes: the UPF-P obtains policy rule information according to the policy request message; the step 2 includes: the UPF-P determines the MEC Router to be involved, and applies the policy to the The rule information is sent to the identified MEC Router.
  • the first step includes: the SMF of the network element of the operator's 5G core network sends the policy request message to the UPF-Proxy of the MEC network control platform, where the policy request message includes: data offload requirements.
  • the method further includes: the UPF-Proxy sends the data offload request to the DN-C; the DN-C generates a traffic offload policy; the step 2 includes: the DN-C in the session Insert a MEC Router that supports the policy offload function on the data path, and send the policy rule information to the determined MEC Router;
  • the step 3 includes: the PLB-MEC router returns an execution response to the DN-C after executing the offload policy. Before the step 2, it also includes: the MEC network control platform queries the MEC orchestrator for deployed MEC hosts and available resources, wherein one MEC host includes more than 2 MEC Routers, and the available resources include at least computing resources and storage. resource.
  • an embodiment of the present application provides a communication system between an MEC and a multi-operator core network, including:
  • the SMF for sending a policy request message to the MEC network control platform, wherein the policy request message includes policy rules and user information of the service flow, or the policy request message includes data offloading requirements;
  • the MEC network control platform is used to receive the policy request message sent by the SMF and complete the local decision, and then issue policy rules to the MEC Router; and, after receiving the reply response sent by the MEC Router, reply to the SMF;
  • the MEC Router is configured to reply a response to the MEC network control platform after completing the execution of the policy.
  • the MEC system level of the MEC network control platform is provided with a UPF-P module and a DN-C module; the MEC system level control plane provides connections to more than two 5G core networks and supports N4 interfaces ; The MEC system-level data plane provides connections to more than two 5G core networks and supports N6 interfaces.
  • the UPF-P module is connected to the MEC Router, and exchanges information through the reference point Mm10; the UPF-P module determines the MEC Router to be involved according to the message from the 5G core network, and passes the reference point Mm10 to the MEC Router.
  • the policy rule information is sent to the MEC Router that needs to be involved.
  • the UPF-P module controls the MEC system-level MEC Router and the MEC host-level MEC Router through the reference point Mm10; the DN-C module controls the MEC host-level PLB-MEC Router through the reference point Mm11.
  • the method and system for communication between the MEC and the multi-operator core network provided by the embodiments of the present invention are internally connected to (multiple) MEC routers through the UPF-P.
  • UPF-P determines the MEC routers to be involved according to the messages from the 5G core network, and sends the policy rule information to the corresponding MEC routers to meet the service quality requirements from the 5G core network.
  • the UPF-P controls the MEC router at the MEC system level and the MEC router at the host level, and the DN-C controls the PLB-MEC router at the MEC host level.
  • the DN-C When the operator's UE accesses the network, if it accesses services that require local offloading, the DN-C inserts a PLB-MEC router on the data path of the UE and issues the offloading policy.
  • the PLB-MEC router will satisfy the service filtering requirements.
  • the regular data packets are forwarded to the specified path, such as forwarded to another MEC router at the MEC host level, and then forwarded to the local data network by the router. If the UE accesses the operator's data network, the PLB-MEC router forwards the data packets that meet the service filtering rules to the MEC host-level MEC router, which is then forwarded to the operator's data network.
  • the DN-C Since the DN-C is connected to the MEC router that supports the Policy-based Local Breakout (PLB) function, for example, information exchange can be performed through the reference point Mm11.
  • the MEC router forwards the data packets to the designated paths according to the distribution rules, and these paths can lead to different data networks.
  • the DN-C inserts a PLB-MEC router on the data path of the UE and issues the offloading policy.
  • the PLB-MEC router will satisfy the service filtering requirements.
  • the regular data packets are forwarded to the specified path, such as forwarded to another MEC router at the MEC host level, and then forwarded to the local data network by the router.
  • the PLB-MEC router forwards the data packets that meet the service filtering rules to the MEC host-level MEC router, which is then forwarded to the operator's data network. In this way, the information exchange between the MEC system and the 5G core networks of different operators is realized.
  • Figure 1 is a schematic diagram of the existing 5G and MEC basic architecture
  • FIG. 2 is a schematic diagram of the architecture of the interconnection between the MEC and the multi-operator 5G core network provided by an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a network element and a reference point in a scenario where an MEC is interconnected with a multi-operator 5G core network provided by an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an architecture involving a UPF proxy, a DN controller, and a PLB-MEC router provided by an embodiment of the present invention
  • FIG. 5 is a flowchart of QoS policy rule delivery in which a UPF agent participates according to an embodiment of the present invention
  • FIG. 6 is a flow chart of issuing a data offload policy in which a DN controller participates according to an embodiment of the present invention.
  • AN Access Network, access network
  • AUSF Authentication Server Function, authentication server function
  • AMF Access and Mobility Management Function
  • eMBB Enhanced Mobile Broadband
  • the gNB in this embodiment can be understood as a 5G base station
  • MEC Router (MEC router),
  • NEF Network Exposure Function, Network Exposure Function
  • NSSF Network Slice Selection Function
  • NRF Network Repository Function, network storage function
  • NG-RAN Next Generation-Radio Access Network
  • OLT Optical Line Terminal, Optical Line Terminal
  • PCF Policy Control Function
  • PCC Policy Control and Charging
  • PLB Policy-based Local Breakout, policy diversion function
  • PLB-MEC MEC router that supports policy offloading function
  • SMF Session Management Function, session management function
  • UPF User Plane Function
  • UE User Equipment, user equipment
  • 5G 5th generation mobile networks or 5th generation wireless systems, 5th-Generation, fifth generation mobile communication technology
  • the ETSI GS MEC specification defines the MEC reference architecture, and the ETSI MEC system consists of the MEC host and the MEC management function.
  • the MEC host includes more than 2 MEC ROUTERMEC platforms, virtualization infrastructure, and various MEC applications and services running on it.
  • MEC management functions include MEC system-level management functions and host-level management functions.
  • the MEC system-level management functions include user application lifecycle management agents, operation support systems, and MEC orchestrators.
  • MEC host-level management functions include MEC platform managers and virtualization. Infrastructure Manager.
  • MEC enables operators and third-party services to be hosted close to the UE's access point, enabling efficient service delivery by reducing end-to-end latency and load on the transport network.
  • the 5G core network selects a UPF close to the UE and performs flow control from the UPF to the local data network through the N6 interface. This may be based on UE's subscription data, UE location, information from Application Functions (AFs), policies or other relevant traffic rules.
  • AFs Application Functions
  • the MEC system plays the role of AF+DN relative to the 5G core network
  • the MEC orchestrator is the MEC system-level functional entity, which acts as an AF and can interact with NEF (Network Exposure Function), or In some cases directly interact with the target 5G NFs, for example, in the role of non-trusted AF to influence user plane policies through NEF->PCF->SMF, or in the role of trusted AF to influence users by directly going to PCF->SMF face strategy.
  • NEF Network Exposure Function
  • the MEC platform can also act as an AF to interact with 5G NFs.
  • the MEC system can interact more with NEF/PCF and invoke other 5GC (5G core network) open capabilities, such as message subscription, QoS, and so on.
  • a UPF-P UPF Proxy
  • the function of the network element is: UPF-P provides connections to multiple 5G core networks and supports the N4 interface defined by 3GPP.
  • the UPF-P receives a message containing policy rules (eg, bandwidth, priority, etc.), user information, etc. of the service flow from the 5G core network (specifically, the SMF).
  • policy rules eg, bandwidth, priority, etc.
  • UPF-P converts and maps the policy rules from the 5G core network into policy rule information that the MEC system can recognize and process according to the local configuration. Specifically, the UPF-P can appropriately adjust the policy rules from the core network according to the local policy and the contract information with the core network operator.
  • the UPF-P is internally connected with (multiple) MEC routers, and exchanges information through the reference point Mm10.
  • UPF-P determines the MEC routers to be involved according to the messages from the 5G core network, and sends the policy rule information to the corresponding MEC routers through Mm10 to meet the QoS requirements from the 5G core network.
  • the UPF-P collects statistics on the traffic usage on the MEC routers, uses the traffic usage as a charging basis, and reports it to the MEC orchestrator and/or SMF.
  • the policy rule information of the MEC router execution response is internally connected with (multiple) MEC routers, and exchanges information through the reference point Mm10.
  • UPF-P determines the M
  • DN-C DN Controller
  • the function of this network element is: DN-C is connected to the MEC router that supports Policy-based Local Breakout (PLB), and passes through the reference point. Mm11 for information exchange.
  • the DN-C issues the traffic distribution rules to the MEC router (PLB-MEC router for short) that supports the Policy-based Local Breakout (PLB) function.
  • the traffic distribution rules can be used to check the uplink IP data packets sent by the UE. IP address/prefix etc.
  • the MEC router forwards the data packets to the designated paths according to the distribution rules, and these paths can lead to different data networks.
  • the PLB-MEC router When deciding to route certain packets to the local data network (Local DN), the PLB-MEC router sends the packet (either through the access layer MEC router or directly) to the local DN. When it is decided to route some data packets to the MEC central data network (Central DN), the PLB-MEC router sends the data packets to the central data network through the central layer MEC router. When deciding to route some packets to the operator data network, the PLB-MEC router sends the packets to the operator network through the central layer MEC router. DN-C can insert or delete a PLB-MEC router on the data path as needed.
  • This embodiment provides a communication system between an MEC and a multi-operator core network.
  • the solution in this embodiment can be understood as a secondary development based on the existing architecture shown in FIG. 1 , and is finally designed as shown in FIG.
  • the purpose is to propose a communication method and system between MEC and multi-operator core network to support the MEC system to connect to the 5G core network of different operators, deeply integrate the access network with the operator's core network, and at the edge of the network closer to the user. Provide services to further improve the user's service quality experience. in:
  • the SMF is configured to send a policy request message to the MEC network control platform, where the policy request message includes policy rules and user information of the service flow, or the policy request message includes data offloading requirements.
  • the MEC network control platform is configured to receive the policy request message sent by the SMF, complete local decision-making, and then issue policy rules to the MEC Router. And, after receiving the reply response sent by the MEC Router, reply to the SMF.
  • the MEC Router is configured to reply a response to the MEC network control platform after completing the execution of the policy.
  • a UPF-P module and a DN-C module are provided at the MEC system level of the MEC network control platform.
  • the MEC system-level control plane provides connections to more than two 5G core networks and supports N4 interfaces.
  • the MEC system-level data plane provides connections to more than two 5G core networks and supports N6 interfaces.
  • the MEC system level is provided with a UPF-P (UPF Proxy) module and a DN-C (DN Controller) module.
  • UPF-P UPF Proxy
  • DN-C DN Controller
  • the MEC system-level control plane provides connections to multiple 5G core networks and supports the N4 interface defined by 3GPP.
  • the MEC system-level data face provides connections to multiple 5G core networks and supports the N6 interface defined by 3GPP.
  • the UPF-P module receives a message containing policy rules (eg, bandwidth, priority, etc.), user information, etc. of the service flow from the 5G core network (specifically, SMF).
  • UPF-P converts and maps the policy rules from the 5G core network into policy rule information that the MEC system can recognize and process according to the local configuration. Specifically, the UPF-P can appropriately adjust the policy rules from the core network according to the local policy and the contract information with the core network operator.
  • the DN-C module is mainly responsible for the formulation of the distribution policy rules.
  • the DN-C distributes the distribution rules to the MEC routers (PLB-MEC routers for short) that support the Policy-based Local Breakout (PLB) function.
  • the distribution rules It may be to check the destination IP address/prefix of the uplink IP data packet sent by the UE, etc.
  • DN-C can insert or delete a PLB-MEC router on the data path as needed.
  • the UPF-P module and the DN-C module can be deployed in the MEC network control platform, and the MEC network control platform has an information exchange interface with the MEC router.
  • the UPF-P module is connected with the MEC Router, and performs information exchange through the reference point Mm10.
  • the UPF-P module determines the MEC Router that needs to be involved according to the message from the 5G core network, and sends the policy rule information to the MEC Router that needs to be involved through the reference point Mm10.
  • the UPF-P is internally connected to (multiple) MEC routers and exchanges information through the reference point Mm10.
  • UPF-P determines the MEC routers to be involved according to the messages from the 5G core network, and sends the policy rule information to the corresponding MEC routers through Mm10 to meet the QoS requirements from the 5G core network.
  • the DN-C is connected to the MEC router that supports the Policy-based Local Breakout (PLB) function, and exchanges information through the reference point Mm11.
  • PLB Policy-based Local Breakout
  • the MEC router forwards the data packets to the designated paths according to the distribution rules, and these paths can lead to different data networks.
  • the UPF-P module controls the MEC Router at the MEC system level and the MEC Router at the MEC host level through the reference point Mm10.
  • the DN-C module controls the PLB-MEC Router at the MEC host level through the reference point Mm11.
  • FIG. 4 it is a detailed architecture diagram of the interaction between MEC and a single operator's 5G core network, in which UPF-P controls MEC system-level MEC routers and host-level MEC routers through Mm10, and DN-C controls through Mm11 MEC host-level PLB-MEC router.
  • the DN-C When the operator's UE accesses the network, if it accesses services that require local offloading, the DN-C inserts a PLB-MEC router on the data path of the UE and issues the offloading policy.
  • the PLB-MEC router will satisfy the service filtering requirements.
  • the regular data packets are forwarded to the specified path, such as forwarded to another MEC router at the MEC host level, and then forwarded to the local data network by the router. If the UE accesses the operator's data network, the PLB-MEC router forwards the data packets that meet the service filtering rules to the MEC host-level MEC router, which is then forwarded to the operator's data network.
  • An embodiment of the present invention provides a communication method between an MEC and a multi-operator core network, which can be applied to the system of the above-mentioned architecture, and the general process steps may include:
  • Step 1 The SMF sends a policy request message to the MEC network control platform.
  • the policy request message includes policy rules and user information of the service flow.
  • the policy request message may further include data offloading requirements.
  • Step 2 After the MEC network control platform completes the local decision, it issues policy rules to the MEC Router.
  • Step 3 After the MEC Router completes the policy execution, it returns a response to the MEC network control platform.
  • Step 4 The MEC network control platform replies to the SMF.
  • the first step includes: the SMF of the network element of the operator's 5G core network sends the policy request message to the UPF-P of the MEC network control platform, where the policy request message includes: Policy rules and user information.
  • the method further includes: the UPF-P acquires policy rule information according to the policy request message.
  • the second step includes: the UPF-P determines the MEC Router that needs to be involved, and sends the policy rule information to the determined MEC Router.
  • the MEC network control platform sends a message to the network control platform.
  • the MEC orchestrator queries the deployed MEC hosts and available resources, where one MEC host contains more than two MEC ROUTERs, and the available resources include at least computing resources and storage resources.
  • the QoS policy rules that can be delivered by the UPF agent include:
  • the network element SMF of the operator's 5G core network sends a policy request message to the UPF-P, which includes policy rules (eg, bandwidth, priority, etc.) of the service flow, user information, and the like.
  • policy rules eg, bandwidth, priority, etc.
  • S2a and UPF-P transform and map the policy rules from the 5G core network into policy rule information that the MEC system can recognize and process according to the local configuration.
  • the UPF-P can appropriately adjust the policy rules from the core network according to the local policy and the contract information with the core network operator.
  • Steps S2a and S2b are integrated, UPF-P determines the MEC routers to be involved, and sends the policy rule information to the corresponding MEC routers to meet the service quality requirements from the 5G core network.
  • the MEC router executes the policy rule.
  • the MEC router replies an execution response to the UPF-P.
  • the UPF-P replies a response message to the SMF.
  • the first step includes: the SMF of the network element of the operator's 5G core network sends the policy request message to the UPF-Proxy of the MEC network control platform, the policy request message Including: data offloading requirements.
  • the method further includes: the UPF-Proxy sends the data offload request to the DN-C.
  • the DN-C generates an offload policy.
  • the second step includes: the DN-C inserts a MEC Router that supports the policy offload function on the data path of the session, and sends the policy rule information to the determined MEC Router.
  • the step 3 includes: the PLB-MEC router returns an execution response to the DN-C after executing the offload policy.
  • the MEC network control platform sends a message to the network control platform.
  • the MEC orchestrator queries the deployed MEC hosts and available resources.
  • One MEC host contains more than two MEC Routers, and the available resources include at least computing resources and storage resources.
  • the data offloading strategy that can be participated by the DN controller can be issued, including:
  • the network element SMF of the operator's 5G core network sends a policy request message to the UPF-Proxy, which includes data offloading requirements.
  • the UPF-Proxy sends the data offload request to the DN-C.
  • S3a and DN-C formulate corresponding offload policies according to local policies, and taking into account the load, capacity of the MEC router, and subscription data of the UE.
  • the DN-C inserts a MEC router that supports the policy offload function on the data path of the session.
  • the PLB-MEC router executes the offload policy.
  • the PLB-MEC router replies an execution response to the DN-C.
  • the MEC-P replies a response message to the SMF.
  • the solution in this embodiment aims to support the MEC system to connect to the 5G core networks of different operators, deeply integrate the access network with the operator's core network, provide services at the network edge closer to the user, and further improve the user's service quality experience.
  • the MEC router(s) are connected internally through the UPF-P pair.
  • UPF-P determines the MEC routers to be involved according to the messages from the 5G core network, and sends the policy rule information to the corresponding MEC routers to meet the service quality requirements from the 5G core network.
  • the UPF-P controls the MEC router at the MEC system level and the MEC router at the host level
  • the DN-C controls the PLB-MEC router at the MEC host level.
  • the DN-C inserts the PLB-MEC router on the data path of the UE and delivers the offloading policy.
  • the PLB-MEC router will satisfy the service filtering requirements.
  • the regular data packets are forwarded to the specified path, such as forwarded to another MEC router at the MEC host level, and then forwarded to the local data network by the router.
  • the PLB-MEC router forwards the data packets that meet the service filtering rules to the MEC host-level MEC router, which is then forwarded to the operator's data network. In this way, the information exchange between the MEC system and the 5G core networks of different operators is realized.
  • the steps of the methods or algorithms described in conjunction with the disclosure of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • the software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, read only memory (ReadOnly Memory, ROM), erasable programmable read only memory (Erasable Programmable ROM, EPROM) , Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium well known in the art.
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the ASIC may be located in the core network interface device.
  • the processor and the storage medium may also exist in the core network interface device as discrete components.
  • the functions described in this application may be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

Abstract

Selon des modes de réalisation, la présente invention concerne un procédé et un système de communication entre un réseau MEC et un réseau central multi-opérateur, ayant trait au domaine technique des télécommunications et permettant de réaliser une interaction d'informations entre un système MEC et des réseaux centraux 5G de différents opérateurs. La présente invention comprend les opérations suivantes : une SMF envoie un message de demande de politique à une plateforme de commande de réseau MEC, le message de demande de politique comprenant des règles de politique de flux de service et des informations d'utilisateur, ou le message de demande de politique comprenant des exigences de distribution de données ; la plateforme de commande de réseau MEC prend une décision locale, puis délivre une règle de politique à un routeur MEC ; le routeur MEC réalise l'exécution de politique, puis renvoie une réponse à la plateforme de commande de réseau MEC ; et la plateforme de commande de réseau MEC répond à la SMF. La présente invention est appropriée pour permettre au système MEC de se connecter à des réseaux centraux 5G de différents opérateurs.
PCT/CN2020/125642 2020-09-25 2020-10-31 Procédé et système de communication entre un réseau mec et un réseau central multi-opérateur WO2022062071A1 (fr)

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