WO2022011862A1 - Procédé et système de communication entre un o-ran et une mec - Google Patents

Procédé et système de communication entre un o-ran et une mec Download PDF

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Publication number
WO2022011862A1
WO2022011862A1 PCT/CN2020/121516 CN2020121516W WO2022011862A1 WO 2022011862 A1 WO2022011862 A1 WO 2022011862A1 CN 2020121516 W CN2020121516 W CN 2020121516W WO 2022011862 A1 WO2022011862 A1 WO 2022011862A1
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Prior art keywords
mec
information
ran
ric
function
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PCT/CN2020/121516
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English (en)
Chinese (zh)
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尤建洁
刘东杰
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网络通信与安全紫金山实验室
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Publication of WO2022011862A1 publication Critical patent/WO2022011862A1/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
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a communication method and system between O-RAN and MEC.
  • 3GPP defines three scenarios for 5G applications: eMBB, URLLC and mMTC.
  • O-RAN reduces the difficulty of construction by comprehensively innovating the access network, and reduces the comprehensive cost input of the wireless network operator's network.
  • MEC provides cloud computing capabilities and an IT service environment at the network edge closer to users, featuring ultra-low latency, ultra-large bandwidth, localization, and high real-time analysis and processing.
  • Embodiments of the present invention provide a communication method and system between O-RAN and MEC, which can realize communication interaction between MEC and O-RAN.
  • an embodiment of the present application provides a communication method between O-RAN and MEC, including:
  • the O-RAN sends the first encapsulated information to the MEC system, where the first information includes information required by the MEC system, and the information required by the MEC system at least includes: the current wireless network available resource information and prediction information on future wireless network resources, the first encapsulation matches the second analysis of the MEC system;
  • the MEC system sends the second encapsulated information to the O-RAN, where the second information includes information required by the RIC function, and the information required by the RIC function at least includes: service type information , prediction information of service occupation resources, service resource request information, and the second encapsulation matches the first parsing of the RIC function.
  • an embodiment of the present application provides a communication system between O-RAN and MEC, including:
  • the MEC function support module is configured on the O-RAN, and the RIC function support module is configured on the MEC system;
  • the MEC function support module is configured to perform a first encapsulation on the first information, and the O-RAN is configured to send the information after the first encapsulation to the MEC system, where the first information includes the MEC
  • the first information includes the MEC
  • the information required by the system, the information required by the MEC system at least includes: available resource information of the current wireless network and prediction information of future wireless network resources, and the first package matches the second analysis of the MEC system;
  • the RIC function support module is configured to perform a second encapsulation on the second information
  • the MEC system is configured to send the information after the second encapsulation to the O-RAN, wherein the second information includes the RIC
  • the information required by the function, the information required by the RIC function at least includes: service type information, service resource prediction information, service resource request information, and the second package matches the first resolution of the RIC function.
  • O-RAN has a MEC function support module, which is responsible for encapsulating the information required by the MEC system into a format that can be parsed by the MEC system, and passing corresponding protocols (such as UDP, SCTP) to the MEC system.
  • MEC function support module responsible for encapsulating the information required by the RIC function into a format that can be parsed by the RIC function, and transmits it to the RIC function through corresponding protocols (such as UDP, SCTP).
  • a mutual authentication mechanism needs to be provided between the two to ensure the credibility and security of the interaction between the two.
  • the communication solution between O-RAN and MEC in this embodiment enables effective interaction between the two, deeply integrates the access network and edge computing, provides services at the edge of the network close to the user, and realizes the customization of the access network capability to improve the user experience.
  • FIG. 1 is an interaction architecture between MEC and O-RAN provided by an embodiment of the present invention
  • FIG. 2 is an interface interaction diagram between MEC and O-RAN provided by an embodiment of the present invention
  • FIG. 3 is a flowchart of the interaction between the MEC and the O-RAN triggered by the MEC according to an embodiment of the present invention
  • FIG. 4 is a flowchart of an interaction triggered by the O-RAN between the MEC and the O-RAN according to an embodiment of the present invention.
  • NSSF Network Slice Selection Function
  • NRF Network Repository Function, network storage function
  • NEF Network Exposure Function, Network Exposure Function
  • AUSF Authentication Server Function, authentication server function
  • AMF Access and Mobility Management Function
  • SMF Session Management Function, session management function
  • PCF Policy Control Function
  • UPF User Plane Function
  • MEC System Level (MEC system level),
  • MEC Platform (MEC platform)
  • MEC Host Level (MEC host level)
  • O-RAN Open Radio Access Network
  • O-CU O-RAN centralized unit, O-RAN centralized unit
  • UE User Equipment, user terminal
  • O-CU-CP the control plane of the O-RAN centralized unit
  • O-CU-UP the user plane of the O-RAN centralized unit
  • O-DU O-RAN distributed unit, O-RAN distributed unit
  • O-RU O-RAN Radio Unit, O-RAN Radio Unit
  • Non-RT RIC Non-RT RAN Intelligent Controller, non-real-time wireless network intelligent controller
  • Near-RT RIC Near-RT RAN Intelligent Controller, near real-time wireless network intelligent controller
  • PCC Policy Control and Charging
  • 5G 5th generation mobile networks or 5th generation wireless systems, 5th-Generation, fifth generation mobile communication technology
  • eMBB Enhanced Mobile Broadband
  • N1, N3, N4, N6, A1, E1, E2, F1-C and F1-U respectively represent the code names of the existing interfaces. These interfaces and related The code name has been commonly used in the current 5G technology and has been defined in the current standard. Those skilled in the art can understand its meaning based on the relevant information of the current 5G technology.
  • the method flow in this embodiment may be implemented on the interaction architecture of the MEC and the O-RAN as shown in FIG. 1 .
  • the ETSI GS MEC specification defines the MEC reference architecture
  • the ETSI MEC system consists of two parts: the MEC host level and the MEC system level.
  • the MEC host level includes the UPF, the MEC platform, and the MEC application.
  • the MEC system level includes the operation support system and the MEC orchestrator.
  • the MEC orchestrator is the core function in MEC system-level management, and is mainly responsible for maintaining an overall view of the MEC system, including deployed MEC hosts, available resources, available MEC services, and network topology.
  • the O-RAN Industry Alliance has defined the O-RAN architecture. Based on the 5G access network CU/DU architecture and function virtualization, two levels of non-real-time and real-time RIC are introduced. Among them, RIC mainly uses big data analysis and artificial intelligence engine to perceive and predict the wireless network environment and make decisions on the allocation of wireless resources. According to the processing delay characteristics, RICs are divided into non-real-time wireless network intelligent controller Non-RT RIC and near-real-time wireless network intelligent controller Near-RT RIC. Specifically, it can be understood as two logical functions. Near-RT RIC can realize near real-time control and optimization of RAN elements and resources through fine-grained data collection and operations through the E2 interface; Non-RT RIC supports RAN elements and resources.
  • Non-real-time control and optimization includes AI/ML workflows (including model training and updating), and application/feature guides for policy-based near-RT RICs.
  • Non-real-time RIC supports importing customized policies and generating AI models and applications.
  • Near real-time RIC supports online real-time execution of artificial intelligence model inference and application.
  • the interface between O-CU and O-DU is F1.
  • An embodiment of the present invention provides a communication method between O-RAN and MEC, and the general process of the method includes:
  • An MEC function support module is configured on the O-RAN, and the first information is first encapsulated by the MEC function support module; the O-RAN sends the information after the first encapsulation to the MEC system, wherein, The first information includes information required by the MEC system, the first encapsulation matches the second parsing of the MEC system, and is transmitted to the MEC system through a corresponding protocol (eg, UDP, SCTP).
  • the information required by the MEC system at least includes: available resource information of the current wireless network and prediction information of future wireless network resources.
  • the O-RAN itself has this information, which may be collected by the O-RAN or Statistics are collected, and then the information is sent to the MEC through the interface between the O-RAN and the MEC (referred to as the X m interface in this embodiment).
  • a RIC function support module is configured on the MEC system, and second information is encapsulated by the RIC function support module; the MEC system sends the second encapsulated information to the O-RAN, wherein , the second information includes information required by the RIC function, and the information required by the RIC function at least includes: service type information, service resource prediction information, service resource request information, and the second package matches the RIC
  • the first parsing of the function is transmitted to the RIC function through the corresponding protocol (eg UDP, SCTP).
  • the MEC function support module and the RIC function support module in this embodiment both represent a function module applied to the MEC system and the O-RAN. This embodiment does not limit whether the function module is implemented by hardware or software.
  • the method before the first encapsulation of the first information by the MEC function support module, the method further includes: a system-level management function MEC orchestrator of the MEC system, which is compatible with the MEC orchestrator in the O-RAN.
  • a system-level management function MEC orchestrator of the MEC system which is compatible with the MEC orchestrator in the O-RAN.
  • an Xm interface is established, and the encapsulated information is transmitted through the Xm interface.
  • the interface Xm between MEC and O-RAN is designed and defined in this embodiment. There is an interactive interface between the near real-time RICs in the RAN.
  • the MEC system will receive information about the wireless network from the O-RAN, including the available resources of the current wireless network and the prediction of future wireless network resources; through this interface, the O-RAN will receive information from the MEC Information about the service of the system, including service type, prediction of service occupation resources, service resource request and other information.
  • O-RAN and MEC belong to different operators, a mutual authentication mechanism needs to be provided between the two to ensure the credibility and security of the interaction between the two.
  • data exchange is performed between the MEC system and the O-RAN through the UDP protocol or the SCTP protocol.
  • the above-mentioned first encapsulation matches the second parsing, and the second encapsulation matches the first parsing, which can be understood as an algorithm for encapsulating/parsing data based on the UDP protocol or SCTP protocol, and "matching" refers to the encapsulated data. Packets can be unpacked by parsing.
  • O-RAN has a MEC function support module, which is responsible for encapsulating the information required by the MEC system into a format that can be parsed by the MEC system, and through the corresponding protocol (such as UDP, SCTP) to the MEC system.
  • MEC function support module responsible for encapsulating the information required by the MEC system into a format that can be parsed by the MEC system, and transmits it to the RIC function through corresponding protocols (such as UDP, SCTP).
  • an interaction process triggered by the MEC is also provided.
  • the method further includes: the MEC system uses the MEC orchestrator Generate a subscription message, and send the subscription message to the Near-RT RIC through the MEC scheduler, and the MEC system also subscribes the wireless network resource information to the O-RAN; the Near-RTRIC generates all the information according to the local information.
  • the local information of the Near-RTRIC may include: information of the wireless network resources where the Near-RTRIC is located locally.
  • both the MEC system and the O-RAN can subscribe to one or more types of messages. For example, if the MEC system subscribes to the current wireless network resources, the reply message includes the current wireless network resource availability status. It can be understood that the MEC system subscribes to the messages generated by the Near-RT RIC.
  • the messages subscribed by O-RAN are generated by the MEC system; thus realizing message interaction and mutual perception between the MEC system and O-RAN. In this process, the MEC system is equivalent to asking questions, and the O-RAN is equivalent to doing reply.
  • Figure 3 the interaction process triggered by MEC is shown in Figure 3, which includes:
  • Step 1 The MEC generates subscription messages according to business requirements.
  • the MEC orchestrator in the MEC system generates subscription messages according to MEC application/service requirements (eg, business type, resource occupation model statistics, etc.). For example, if a user initiates an MEC application service for 8K high-definition video, the MEC can subscribe to the O-RAN for current radio resource information to determine whether the current bandwidth resources can meet the user's high-definition video requirements.
  • MEC application/service requirements eg, business type, resource occupation model statistics, etc.
  • Step 2 The MEC scheduler sends a subscription message to the Near-RT RIC, and subscribes to the O-RAN for wireless network resource information, such as available bandwidth, wireless resource statistics, and the like.
  • Step 3 The Near-RT RIC generates the message subscribed by the MEC according to the local information, and generates a reply response when the subscription conditions (such as the time period) are met.
  • Step 4 The Near-RT RIC replies to the MEC orchestrator with a response message, carrying parameters such as available bandwidth and time;
  • Step 5 The MEC system optimizes service parameters (such as the video bit rate of the video service) and the like according to the received information.
  • service parameters such as the video bit rate of the video service
  • an interaction process triggered by the O-RAN is also provided.
  • the MEC system sends the second encapsulated information to the O-RAN, it further includes: the O-RAN passes the information through the second encapsulation.
  • the Near-RT RIC generates a subscription message according to network requirements, and sends the subscription message to the MEC orchestrator through the Near-RT RIC;
  • the MEC orchestrator generates the message subscribed by the O-RAN according to local information, and generate a response message;
  • the MEC scheduler replies the response message to the Near-RT RIC, and the parameters in the response message at least include the service type;
  • the Near-RT RIC updates the wireless Resource allocation.
  • the network requirements include information such as bandwidth and priority.
  • the local information of the MEC system includes service requirements, such as service type and bandwidth.
  • the local information of O-RAN includes radio resource availability and so on. It should be noted that the content of the response messages sent by each device is not the same. According to common understanding, in the process of asking and answering two devices, the messages generally appear in pairs, that is, the request message and the response message. Generally, they appear in pairs.
  • the MEC system sends an inquiry to the O-RAN by sending a request message, and the O-RAN feeds back a response message to the MEC system as a response, and vice versa.
  • Figure 4 the interaction process triggered by the O-RAN is shown in Figure 4, which includes:
  • Step 1 O-RAN generates subscription messages according to network requirements, specifically, Near-RT RIC generates subscription messages according to network requirements.
  • Step 2 The Near-RT RIC sends a subscription message to the MEC orchestrator, such as service type, resource occupation model statistics and other information.
  • Step 3 The MEC orchestrator generates a message subscribed by the O-RAN according to the local information, and generates a reply response when the subscription condition (such as a time period) is satisfied.
  • Step 4 The MEC orchestrator replies to the Near-RT RIC with a response message, carrying parameters such as service type;
  • Step 5 Near-RT RIC optimizes wireless resource allocation according to the received information, etc.
  • the specific method of optimizing wireless resource allocation can be determined according to the specific application scenario, such as: increasing the priority or lowering it, or pre-setting certain services. Reserve resources, or preempt resources, etc.
  • the illustration in this embodiment adopts the interaction process between the MEC orchestrator and the Near-RT RIC, and the interaction process is also applicable to the interaction between the MEC orchestrator and the Non-RT RIC, here No longer.
  • an interface Xm between MEC and O-RAN is provided, specifically, between the MEC system level management function MEC orchestrator and the near real-time RIC in O-RAN
  • the MEC system will receive information about the wireless network from the O-RAN, specifically, the information includes information such as the available resources of the current wireless network and the prediction of the resources of the wireless network in the future.
  • the O-RAN will receive information about the service from the MEC system, specifically, the information includes information such as service type, prediction of service occupation resources, service resource request and so on.
  • MEC function support module in O-RAN, which is responsible for encapsulating the information required by the MEC system into a format that can be parsed by the MEC system, and transmitting it to the MEC system through corresponding protocols (such as UDP, SCTP).
  • RIC function support module in the MEC system, which is responsible for encapsulating the information required by the RIC function into a format that can be parsed by the RIC function, and transmits it to the RIC function through corresponding protocols (such as UDP, SCTP).
  • the communication solution between O-RAN and MEC in this embodiment enables effective interaction between the two, deeply integrates the access network and edge computing, provides services at the edge of the network close to the user, and realizes the customization of the access network capability to improve the user experience.
  • a communication system between O-RAN and MEC is also provided.
  • the MEC function support module is configured on the O-RAN
  • the RIC function support module is configured on the MEC system.
  • the MEC function support module is configured to perform a first encapsulation on the first information
  • the O-RAN is configured to send the information after the first encapsulation to the MEC system, where the first information includes the MEC
  • the information required by the system, the information required by the MEC system at least includes: available resource information of the current wireless network and prediction information of future wireless network resources, and the first package matches the second parsing of the MEC system.
  • the RIC function support module is configured to perform a second encapsulation on the second information
  • the MEC system is configured to send the information after the second encapsulation to the O-RAN, wherein the second information includes the RIC
  • the information required by the function, the information required by the RIC function at least includes: service type information, service resource prediction information, service resource request information, and the second package matches the first resolution of the RIC function.
  • the encapsulated information is transmitted through the Xm interface.
  • Data exchange is performed between the MEC system and the O-RAN through the UDP protocol or the SCTP protocol.
  • the MEC scheduler is further configured to generate a subscription message and send the subscription message to the Near-RT RIC
  • the MEC system is further configured to subscribe to the O-RAN for wireless network resource information.
  • the Near-RT RIC is used to generate the message subscribed by the MEC system according to the local information, and generate a response message, and reply the response message to the MEC orchestrator, the parameters in the response message at least include available Bandwidth information and time information, the MEC system is also used for updating service parameters according to the received response message.
  • the Near-RT RIC is further configured to generate a subscription message according to network requirements, and send the subscription message to the MEC orchestrator.
  • the MEC orchestrator is further configured to generate a message subscribed by the O-RAN according to local information, and generate a response message, and then reply the response message to the Near-RT RIC, wherein the parameters in the response message are at least Include business type.
  • the Near-RT RIC is also used to update the radio resource allocation according to the received response message.
  • an interface Xm between MEC and O-RAN is provided, specifically, between the MEC system level management function MEC orchestrator and the near real-time RIC in O-RAN
  • the MEC system will receive information about the wireless network from the O-RAN, specifically, the information includes information such as the available resources of the current wireless network and the prediction of the resources of the wireless network in the future.
  • the O-RAN will receive information about the service from the MEC system, specifically, the information includes information such as service type, prediction of service occupation resources, service resource request and so on.
  • MEC function support module in O-RAN, which is responsible for encapsulating the information required by the MEC system into a format that can be parsed by the MEC system, and transmitting it to the MEC system through corresponding protocols (such as UDP, SCTP).
  • RIC function support module in the MEC system, which is responsible for encapsulating the information required by the RIC function into a format that can be parsed by the RIC function, and transmits it to the RIC function through corresponding protocols (such as UDP, SCTP).
  • the communication solution between O-RAN and MEC in this embodiment enables effective interaction between the two, deeply integrates the access network and edge computing, provides services at the edge of the network close to the user, and realizes the customization of the access network capability to improve the user experience.
  • 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 (RandomAccessMemory, RAM), flash memory, read-only memory (ReadOnlyMemory, ROM), erasable programmable read-only memory (ErasableProgrammableROM, 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.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

Selon des modes de réalisation, la présente invention se rapporte au domaine technique des communications. Sont divulgués un procédé et un système de communication entre un O-RAN et une MEC, aptes à réaliser une interaction de communication entre la MEC et l'O-RAN. La présente invention consiste : à configurer un module de support de fonctions MEC sur un O-RAN, et à effectuer une première encapsulation sur des premières informations au moyen du module de support de fonctions MEC ; après la première encapsulation, l'O-RAN envoie les informations à un système MEC, les premières informations contenant des informations requises par le système MEC ; à configurer un module de support de fonctions RIC sur le système MEC, et à effectuer une seconde encapsulation sur des secondes informations au moyen du module de support de fonctions RIC ; et après la seconde encapsulation, le système MEC envoie les informations à l'O-RAN. La présente invention peut être appliquée pour une communication entre une MEC et un O-RAN.
PCT/CN2020/121516 2020-07-13 2020-10-16 Procédé et système de communication entre un o-ran et une mec WO2022011862A1 (fr)

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