WO2020029922A1 - Procédé et appareil de transmission de message - Google Patents

Procédé et appareil de transmission de message Download PDF

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Publication number
WO2020029922A1
WO2020029922A1 PCT/CN2019/099287 CN2019099287W WO2020029922A1 WO 2020029922 A1 WO2020029922 A1 WO 2020029922A1 CN 2019099287 W CN2019099287 W CN 2019099287W WO 2020029922 A1 WO2020029922 A1 WO 2020029922A1
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WO
WIPO (PCT)
Prior art keywords
network element
message
pfcp
user plane
packet
Prior art date
Application number
PCT/CN2019/099287
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English (en)
Chinese (zh)
Inventor
胡翔
夏渊
孙晓东
崔文奇
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2020029922A1 publication Critical patent/WO2020029922A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation

Definitions

  • the present application relates to the field of communications, and more specifically, to a method and apparatus for transmitting leopard print in the field of communications.
  • CP control plane
  • SMF user plane
  • UPF user plane
  • the network element will use two different tunneling protocol stacks during the transmission of signaling or data.
  • the packet forwarding control protocol (PFCP) tunnel protocol stack is used for signaling transmission, that is, the signaling transmitted between the SMF network element and the UPF network element is encapsulated using the PFCP tunnel protocol; for data
  • the transmission uses the general packet radio service technology (general packet service, GPRS) tunnel protocol user plane part (GPRS Protocol-User Plane, GTP-U) tunnel protocol stack, that is, the transmission between SMF network elements and UPF network elements
  • the data is encapsulated using the general packet radio service (GPRS) tunneling user interface (GPRS) tunneling protocol-user plane (GTP-U) tunneling protocol and then forwarded to other network elements.
  • GPRS general packet radio service
  • GPRS general packet radio service
  • the GTP-U tunnel protocol is used to encapsulate the data. Means that the GTP-U tunnel protocol stack and corresponding path management need to be maintained all the time. In this way, system resources are wasted.
  • the present application provides a method and device for transmitting messages, which can effectively save system resources.
  • a method for transmitting a message includes:
  • the user plane network element obtains a first original message from the first network element through the received first message, and the first network element includes any of the following: a terminal device, a data network DN network element, or a second user plane network yuan;
  • the user plane network element encapsulates the first original message using a packet forwarding control protocol PFCP tunneling protocol to obtain a second message;
  • the user plane network element sends the second message to a session management network element.
  • the method for transmitting a message uses an existing PFCP tunneling protocol for signaling between a user plane network element and a session management network element to encapsulate a user plane data message (for example, the first (Original message), and no longer uses the existing GTP-U tunnel protocol to encapsulate user plane data messages, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the method further includes:
  • the user plane network element using the packet forwarding control protocol PFCP tunneling protocol to encapsulate the first original message includes:
  • the user plane network element encapsulates the first original message according to the first information.
  • the user plane network element can use the first information sent by the session management network element to the user plane network element in the prior art to encapsulate the first original message, which effectively reduces signaling overhead.
  • the method further includes:
  • the user plane network element using the packet forwarding control protocol PFCP tunneling protocol to encapsulate the first original message includes:
  • the user plane network element obtains second information from a field corresponding to a forwarding operation rule FAR of the PDR according to the PDI, and the second information includes a packet corresponding to the PFCP tunneling protocol for encapsulating the first original Message parameters;
  • the user plane network element encapsulates the first original message according to the second information.
  • the first original message is encapsulated by obtaining parameters corresponding to the PFCP tunneling protocol for encapsulating the first original message from the fields of the FAR corresponding to the PDR, so that the implementation of the solution changes the existing standard to a small extent, which is convenient. Implement the operation.
  • the field of the FAR corresponding to the PDR does not include information for encapsulating the first original message using a GTP-U tunneling protocol of a user plane part of a general packet radio service technology tunneling protocol.
  • the user plane network element can know that the PFCP tunneling protocol is used to encapsulate the first original message.
  • the second message is a PFCP session report request, or the second message is a PFCP session data transmission request.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • the method further includes:
  • the user plane network element uses the PFCP tunneling protocol to decapsulate the third message to obtain the second original message;
  • the user plane network element sends the second original message to the first network element.
  • the third message is a PFCP session report response, or the third message is a PFCP session data transmission response.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • a method for transmitting a message includes:
  • the session management network element receives a second packet from the user plane network element based on the PFCP tunneling protocol.
  • the second packet includes the first original packet, and the first original packet is from the first network.
  • the first network element includes any one of the following: a terminal device, a data network DN network element, or a second user plane network element;
  • the session management network element uses the packet forwarding control protocol PFCP tunneling protocol to perform decapsulation processing on the second message to obtain the first original message.
  • the method for transmitting a message uses an existing PFCP tunneling protocol for signaling between a user plane network element and a session management network element to encapsulate a user plane data message (for example, the first (Original message), and no longer uses the existing GTP-U tunnel protocol to encapsulate user plane data messages, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the method further includes:
  • the session management sends first information to the user plane network element, where the first information includes parameters corresponding to the PFCP tunneling protocol and used to encapsulate the first original IP packet.
  • the user plane network element can use the first information sent by the session management network element to the user plane network element in the prior art to encapsulate the first original message, which effectively reduces signaling overhead.
  • the method further includes:
  • the session management network element sends packet detection information PDI for describing a packet detection rule PDR to the user plane network element, wherein a field corresponding to the forwarding operation rule FAR of the PDR includes second information, and the second The information includes parameters corresponding to the PFCP tunneling protocol for encapsulating the first original IP packet.
  • the first original message is encapsulated by obtaining parameters corresponding to the PFCP tunneling protocol for encapsulating the first original message from the fields of the FAR corresponding to the PDR, so that the implementation of the solution changes the existing standard to a small extent, which is convenient. Implement the operation.
  • the field of the FAR of the PDR does not include information for encapsulating the first original IP packet using a GTP-U tunneling protocol of a user plane portion of a general packet radio service technology tunneling protocol.
  • the user plane network element can know that the PFCP tunneling protocol is used to encapsulate the first original message.
  • the second message is a PFCP session report request, or the second message is a PFCP session data transmission request.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • the method further includes:
  • the session management network element uses the PFCP tunneling protocol to encapsulate a second original message for the first original message to obtain a third message;
  • the session management network element sends the third packet to the user plane network element.
  • the third message is a PFCP session report response, or the third message is a PFCP session data transmission response.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • a method for transmitting a message includes:
  • the session management network element uses the packet forwarding control protocol PFCP tunneling protocol to encapsulate the fourth original message to obtain a fourth message.
  • the fourth original message needs to be sent to the first network element.
  • the first network element includes any of the following: A: terminal equipment, data network DN network element, or second user plane network element;
  • the session management network element sends the fourth message to a user plane network element.
  • the method for transmitting a message uses an existing PFCP tunneling protocol for signaling between a user plane network element and a session management network element to encapsulate a user plane data message (for example, the fourth (Original message), and no longer uses the existing GTP-U tunnel protocol to encapsulate user plane data messages, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the method further includes:
  • the session management network element sends packet detection information PDI for describing a packet detection rule PDR to the user plane network element, wherein a field of the FAR corresponding to the PDR does not include a tunneling protocol for using a general packet radio service technology Information of the user plane part of the GTP-U tunnel protocol performing decapsulation processing on the fourth packet.
  • the user plane network element can clearly know that the fourth message is processed using the PFCP tunnel protocol. Decapsulation processing.
  • the fourth message is a PFCP session modification request, or the fourth message is a PFCP session data transmission request.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • a method for transmitting a message includes:
  • the user plane network element receives a fourth message sent by the session management network element, the fourth message includes a fourth original message sent to the first network element, and the first network element includes any of the following: a terminal device, a data network DN network element or second user plane network element;
  • the user plane network element decapsulates the fourth message by using a packet forwarding control protocol PFCP tunneling protocol to obtain the fourth original message.
  • the method for transmitting a message uses an existing PFCP tunneling protocol for signaling between a user plane network element and a session management network element to encapsulate a user plane data message (for example, the fourth (Original message), and no longer uses the existing GTP-U tunnel protocol to encapsulate user plane data messages, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the method further includes:
  • the user plane network element receives the packet detection information PDI used to describe the packet detection rule PDR sent by the session management network element, wherein a field of the FAR corresponding to the PDR does not include a tunnel for using a general packet radio service technology Information of the GTP-U tunneling protocol on the user plane of the protocol for decapsulating the fourth message.
  • the user plane network element can clearly know that the fourth message is processed using the PFCP tunnel protocol. Decapsulation processing.
  • the fourth message is a PFCP session modification request, or the fourth message is a PFCP session data transmission request.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • a device for transmitting a message is provided, and the device may be configured to perform operations in any one of the foregoing first to fourth aspects and any possible implementation manner of any aspect.
  • the apparatus may include a module unit for performing each operation in any one of the first to fourth aspects or any possible implementation of any aspect.
  • an apparatus for transmitting a message includes a processor, a transceiver, and a memory.
  • the processor, the transceiver and the memory communicate with each other through an internal connection path.
  • the memory is configured to store instructions
  • the processor is configured to execute the instructions stored in the memory.
  • the foregoing execution causes the apparatus to execute any one of the foregoing first aspect to the fourth aspect or any method in any possible implementation manner of any aspect.
  • a chip system including a memory and a processor.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device on which the chip system is installed executes the first aspect to The fourth aspect and any of its possible implementation methods.
  • a computer program product includes: computer program code, when the computer program code is used by a communication unit, a processing unit, or a transceiver of a communication device (for example, a user plane network element or a session management network element).
  • a communication device for example, a user plane network element or a session management network element.
  • the communication device is caused to execute any one of the foregoing first to fourth aspects and possible implementation methods thereof.
  • a computer-readable storage medium stores a program, and the program causes a communication device (for example, a user plane network element or a session management network element) to execute the first aspect to the fourth aspect and Any of its possible implementations.
  • a communication device for example, a user plane network element or a session management network element
  • a computer program is provided.
  • the computer program When the computer program is executed on a certain computer, the computer will enable the computer to implement any one of the foregoing first to fourth aspects and possible implementation methods thereof.
  • an embodiment of the present application provides a communication system, and a system including one or more of a user plane network element and a session management network element.
  • the user plane network element may be used to execute the method described in the first aspect or any possible design of the first aspect, the method described in the fourth aspect or any possible design of the fourth aspect, or The method implemented by the user plane network element in the solution provided in the embodiment of the present application.
  • the session management network element may be used to perform the method described in the second aspect or any one of the possible designs of the second aspect, the method described in the third aspect or any one of the possible designs of the third aspect, or The method performed by the session management network element in the solution provided in the embodiment of the present application.
  • the system further includes other devices, such as an access network and / or a DN, that interact with any one of the user plane network element and the session management network element in the solution provided in the embodiments of the present application.
  • Network element etc.
  • FIG. 1 is a schematic diagram of a possible network architecture according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a process of transmitting signaling and data between a UPF network element and an SMF network element in the prior art.
  • 3 to 4 are schematic flowcharts of a process in which an UPF network element and an SMF network element transmit an original message from a first network element according to an embodiment of the present application.
  • 5 to 6 are schematic flowcharts of a process in which an UPF network element and an SMF network element transmit an original packet that finally needs to be sent to a first network element according to an embodiment of the present application.
  • FIG. 7 to 10 are schematic block diagrams of an apparatus for transmitting packets according to an embodiment of the present application.
  • GSM global mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunications System
  • WiMAX Global Interoperability for Microwave Access
  • the terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or User device.
  • Terminal equipment can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and wireless communications Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or public land mobile network (PLMN) in future evolution Terminal equipment and the like are not limited in this embodiment of the present application.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • PLMN public land mobile network
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a Global System for Mobile Communication (GSM) system or a Code Division Multiple Access (CDMA) system.
  • the base station (Base Transceiver Station (BTS)) can also be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolved) in an LTE system.
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multiple Access
  • the base station can also be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolved) in an LTE system.
  • NodeB, NB base station
  • WCDMA wideband code division multiple access
  • evolved evolved base station
  • NodeB can also be a wireless controller in a cloud radio access network (CRAN) scenario, and can also be a core network device, such as the access management function (access management function in 5G architecture) Mobility management function (AMF) network element, session management function (SMF) network element, user plane function (UPF) network element, and can also be relay station, access point, vehicle equipment, wearable device It can also be a network device in a future 5G network or a network device in a future evolved PLMN network, etc.
  • 5G wireless access device called a new radio access apparatus of the fifth generation mobile communication system (5G new radio, 5G NR) and the like, embodiments of the present application is not limited.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • This hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system.
  • This application layer contains applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the application can be run to provide the program according to the embodiment of the application.
  • the communication may be performed by using the method described above.
  • the method execution subject provided in the embodiments of the present application may be a terminal device or a network device, or a function module in the terminal device or the network device that can call a program and execute the program.
  • various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and / or engineering techniques.
  • article of manufacture encompasses a computer program accessible from any computer-readable device, carrier, or medium.
  • computer-readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CD), digital versatile discs (DVD) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and / or other machine-readable media used to store information.
  • machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instruction (s) and / or data.
  • FIG. 1 is a network architecture applied to an embodiment of the present application.
  • the network architecture is a 5G network architecture described from the perspective of a service-oriented interface, and each network element involved in the network architecture is described separately.
  • (radio access network (R) AN) network element It is used to provide network access functions for authorized users in specific areas, and can use different quality transmission tunnels according to user levels and business needs .
  • the (R) AN network element can manage wireless resources and provide access services for terminal equipment, thereby completing the transfer of control signals and user data between the terminal equipment and the core network.
  • the (R) AN network element can also be understood as a traditional network Base station.
  • User plane network element used for packet routing and forwarding, quality of service (QoS) processing of user plane data, packet detection, and policy rule execution.
  • QoS quality of service
  • the user plane network element may be a user plane function (UPF) network element.
  • UPF user plane function
  • future communications such as 6G communication, the user plane network element may still be a UPF network element or have another name. This application This is not limited.
  • Data network (DN) network element A network for providing data transmission, such as an Internet network.
  • the DN network element may be data network authentication, authorization, and accounting (data network authentication, authorization, accounting), or may be an application server (application function).
  • Authentication service network element mainly used for user authentication.
  • the authentication service network element may be an authentication service function (aUthentication server function (AUSF) network element.
  • AUSF authentication service function
  • future communications such as 6G communication
  • the authentication service network element may still be an AUSF network element or have another name. This application This is not limited.
  • Access management network element It is mainly used for mobility management and access management, such as user location update, user registration network, user switch, legal monitoring, and access authorization ⁇ authentication.
  • the access management network element may be an access management function (AMF) network element.
  • AMF access management function
  • future communications such as 6G communication, the access management network element may still be an AMF network element, or Other names are not limited in this application.
  • Session management network element It is mainly used for session management, network protocol (IP) address allocation and management of terminal equipment, selection of manageable UPF network elements, and access to session information related to the access network through AMF , Endpoints for policy control and charging function interfaces, and downstream data notification.
  • IP network protocol
  • the session management network element may be a session management function (SMF) network element.
  • SMF session management function
  • future communications such as 6G communication, the session management function network element may still be an SMF network element or have another name. The application does not limit this.
  • network open network element used to securely open to the outside the services and capabilities provided by 3GPP network functions.
  • the network open network element may be a network open function (NEF) network element.
  • NEF network open function
  • future communications such as 6G communication
  • the network open function network element may still be an NEF network element or have another name. The application does not limit this.
  • Network storage network element It is used to save the description information of network functional entities and the services they provide, and to support service discovery and network element entity discovery.
  • the network storage network element may be a network storage function (NRF) network element.
  • NEF network storage function
  • future communications such as 6G communication
  • the network storage function network element may still be an NEF network element or have another name. The application does not limit this.
  • Policy control network element a unified policy framework for guiding network behavior, providing policy rule information for control plane function network elements (such as AMF, SMF network elements, etc.).
  • control plane function network elements such as AMF, SMF network elements, etc.
  • the policy control network element may be a policy control function (PCF) network element.
  • PCF policy control function
  • future communications such as 6G communication, the policy control function network element may still be an NEF network element or have another name. The application does not limit this.
  • Unified data management (UDM) network element used to implement functions such as processing user identification, access authentication, registration, and mobility management.
  • Application network element It is used for data routing of application influence, access to network function open network element, interaction with policy framework for policy control, etc.
  • the application network element may be an application function (AF) network element.
  • AF application function
  • future communications such as 6G communication
  • the application function network element may still be an AF network element or have another name. This application does not make any reference to this. limited.
  • NWDA Network data analysis
  • Terminal equipment It can include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, and various forms of terminals, mobile stations (mobile stations, MS ), Terminal (terminal), user equipment (UE), soft terminal, etc., such as water meters, electricity meters, sensors, etc.
  • the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (for example, a cloud platform).
  • the following description takes the user plane network element as a UPF network element and the session management network element as an SMF network element for illustration. That is, the UPF network elements described later in this application can be replaced with user plane network elements, and the SMF network elements can be replaced with session management network elements.
  • the N2 interface is the reference point of the (R) AN120 network element and the AMF160 network element, and is used to send non-access stratum (NAS) messages.
  • the N3 interface is the (R) AN120 network.
  • the reference point between the network element and the UPF130 network element is used to transmit user plane data, etc .
  • the N4 interface is the reference point between the SMF170 network element and the UPF130 network element, and is used to transmit, for example, tunnel identification information for N3 connections, and data cache instructions Information, and downlink data notification messages
  • N6 interface is the reference point between UPF network element 130 and DN network element 140, used to transmit user plane data, etc .
  • N23 interface between NWDA network element 1140 and PCF network element 1110 As a reference point, if the AF network element 130 is an AF network element inside the network, the AF network element 130 will interact with other network elements through the PCF network element 1110 or the NEF network element 180.
  • the N9 interface not shown in the figure is
  • the N3 interface, N6 interface, and N9 interface are all used by UPF network elements and other network elements to transmit user plane data.
  • the N3 interface, N6 interface, and N9 interface can be referred to as data plane interfaces.
  • the data received by the UPF network element from the N3 interface is uplink data forwarded by the terminal device through the access network device (or, wireless access device), and the data sent by the UPF network element through the N3 interface is transmitted through the access network device (or , Wireless access device) to the downlink data sent to the terminal device. Therefore, in the embodiment of the present application, the data transmitted between the UPF network element and the SMF network element may be data from or finally sent to any network element in the terminal device, the DN network element, and other UPF network elements.
  • the above-mentioned network architecture applied to the embodiments of the present application is merely an exemplary network architecture described from the perspective of a service-oriented architecture, and the network architecture applicable to the embodiments of the present application is not limited to this.
  • the functions of the network architecture are applicable to the embodiments of the present application.
  • network function entities such as AMF network element 160, SMF network element 170, PCF network element 1110, and UDM network element 1120 are referred to as network function (NF) network elements; or, in some network architectures, a collection of network elements such as AMF network element 160, SMF network element 170, PCF network element 1110, and UDM network element 1120 may be referred to as control plane function (CPF) network elements.
  • NF network function
  • CPF control plane function
  • a UPF network element can be mapped to SGW-U / PGW-U / TDF-U, and SMF The network elements are mapped to SGW-C / PGW-C / TDF-C network elements.
  • the UPF network element can be a control plane serving gateway-control (SGW-C) / control plane public data network gateway (control-PGW-C), and can also be a control plane detection function Network element (traffic detection function-control, TDF-C).
  • the user plane network element can be a user plane serving gateway-user (SGW-U) / user plane public data network gateway (public gateway network-gateway-user, PGW). -U), which can also be a traffic detection function network element (TDF-U).
  • SGW-U / PGW-U can establish control plane signaling connection with SGW-C / PGW-C through Gx interface; SCF can connect with SGW-C / PGW-C, SGW-U / via service interface The PGW-U establishes a control plane signaling connection.
  • SGW-C / PGW-C and SGW-U / PGW-U are independently deployed in a 4G system, and SGW-C / PGW-C and SGW-U / PGW-U can also be integrated on the same network element (such as SGW / PGW / TDF).
  • the SMF network element sends a PFCP session establishment request to the UPF network element.
  • the PFCP session establishment request includes packet inspection information (Packet Detection Information, PDI) for describing a packet inspection rule (Packet Detection Rule, PDR).
  • PDI Packet Detection Information
  • PDR Packet Detection Rule
  • the parameters used to describe the PDR in PDI include at least: flow description information, fully qualified tunnel endpoint identifier (F-TEID), application identifier, network instance, and other information that can describe the service flow.
  • F-TEID fully qualified tunnel endpoint identifier
  • the flow description information includes the tunnel endpoint identifier of the address.
  • the first field (forwarding parameters) of the forwarding action rule (FAR) corresponding to the PDR The outer header (creation, IE) carries parameters for encapsulating messages using the GTP-U tunneling protocol.
  • the second field in the FAR defines that the control plane function network element that the UPF network element sends the received message to is an SMF network element.
  • the UPF network element sends a PFCP session establishment response to the MFCP session establishment request to the SMF network element.
  • the signaling transmitted between the UPF network element and the SMF network element uses the PFCP tunneling protocol. Therefore, the PFCP session establishment request is the information encapsulated by the SMF network element using the PFCP tunneling protocol. The PFCP session establishment request is decapsulated to obtain the session establishment request, so that the encapsulated PFCP session request response can be sent to the SMF network element.
  • the session between the UPF network element and the SMF network element is successfully established, and the user plane data packets can be transmitted subsequently.
  • the UPF network element decapsulates the received message to obtain the original message.
  • the UPF network element decapsulates the packet according to the tunneling protocol established between the UPF network element and the network element sending the packet, or the UPF network element processes the packet according to the tunneling protocol corresponding to the data plane interface. Perform decapsulation processing. For example, if the message is data sent from an access network device (ie, (R) AN) through the N3 interface, the message is decapsulated based on the tunneling protocol corresponding to the N3 interface to obtain the original message.
  • an access network device ie, (R) AN
  • the original message is the user plane data message mentioned above, which is a message sent from any network element in the terminal device, DN network element, or other UPF network element.
  • the original message may be Original IP packets, original Ethernet packets, etc.
  • the UPF network element uses the GTP-U tunnel protocol to encapsulate the original message to obtain the encapsulated message.
  • the UPF network element encapsulates the original message according to information related to the GTP-U tunneling protocol.
  • the information about the GTP-U tunnel protocol can be obtained based on the PDI carried in the session establishment request in S210.
  • the UPF network element matches the message with various parameters in the PDI carried in the session establishment request. When the parameters in the message and the parameters in the PDI match, it determines to send the message.
  • the message is encapsulated based on parameters of the GTP-U tunneling protocol carried in the IE's outer header and creation in the FAR corresponding to the PDR.
  • the UPF network element sends the encapsulated message to the SMF network element.
  • the SMF network element uses the GTP-U tunneling protocol to decapsulate the encapsulated message to obtain the original message.
  • the tunnel protocol encapsulates data, which means that the GTP-U tunnel protocol stack and corresponding path management need to be maintained all the time, wasting system resources.
  • an embodiment of the present application provides a method for transmitting a message, by using an existing PFCP tunnel protocol for transmitting signaling between a UPF network element and an SMF network element to encapsulate a user plane data message
  • GTP-U tunnel protocol in the prior art is no longer used to encapsulate user plane data packets, which can simplify the allocation and buffering of tunnel resources (ie, simplify the resources related to the GTP-U tunnel protocol stack), save system resources, and at the same time, It can also reduce implementation complexity.
  • Figures 3 to 5 describe the process in which the UPF network element and SMF network element transmit the original message from the first network element
  • Figures 6 to 8 describe the transmission of the UPF network element and SMF network element to the final Process of the original message of the first network element.
  • the first network element includes any one of a terminal device, a DN network element (for example, DN-AAA or AF, etc.), or other UPF network elements.
  • the UPF network element obtains a first original message from the first network element through the received first packet, and the first network element includes any one of the following: a terminal device, a data network DN network element, or another UPF network element.
  • the first original message may be an IP message or an Ethernet message, which is not limited in the embodiment of the present application, as long as the message is received by the UPF network element from the first network element.
  • the first original message is considered to be the first original message, or the first original message needs to be sent to the SMF network element.
  • the first original message may be a message encapsulated with at least one of the following messages, where the at least one message includes at least: a delay of an IPv6 dynamic host configuration protocol (DHCPv4) initiated by a terminal device IP address allocation, after the DHCPv6 mobile phone routes IP address allocation and IPv6 router request (RS) or router advertisement (RA), neighbor request RS or neighbor advertisement RA message, etc.
  • DHCPv4 IPv6 dynamic host configuration protocol
  • RS IPv6 router request
  • RA router advertisement
  • other network elements send the first message to the UPF network element through the data plane interface, and the first message is a message in which the other original network element encapsulates the first original message through a tunneling protocol corresponding to the data plane interface.
  • the other network element may include any one of an access network device, another UPF, or a DN network element: for example, if the other network element includes an access network device, the data plane interface is an N3 interface; if the other network element Including DN network elements, the data plane interface is an N6 interface; if the other network elements are other UPF network elements, the data plane interface is an N9 interface.
  • the SMF network element sends a PDI to the UPF network element through the session establishment request.
  • the UPF network element successfully matches the first message received with each parameter in the PDI, it can use the corresponding
  • the tunneling protocol of the data plane interface decapsulates the first packet, so as to obtain the first original packet.
  • the first network element may be considered as the source network element that sends or generates the first original packet.
  • the following describes the relationship between the first network element and other network elements.
  • the first network element is a DN network element or another UPF network element
  • the first network element and the other network element are the same network element;
  • the first network element is a terminal device, the first network element and the other network element Different
  • the other network elements are access network devices.
  • the access network device uses the tunneling protocol corresponding to the N3 interface to encapsulate the first original message received from the terminal device, and obtains the first message. Sent to a UPF network element.
  • the UPF network element uses the packet forwarding control protocol PFCP tunneling protocol to encapsulate the first original message to obtain a second message.
  • the UPF network element encapsulates the first original message by using relevant parameters defined in the PFCP tunneling protocol, where the parameters include at least: the destination IP address of the sent message, message type, session ID, message length, port number, etc. .
  • the second message since the second message is a message generated based on the PFCP tunneling protocol encapsulation, the second message may also be referred to as a second PFCP message.
  • the UPF network element obtains the first original message from the first message, and can encapsulate the first original message to obtain a second message including the first original message.
  • the UPF network element may decapsulate the first message and use the PFCP tunneling protocol to encapsulate the first original message.
  • the second message may include only the first original message, for example, the second message may be a PFCP session data transmission request; the second message may also include the first original message and Information other than an original message, for example, the second message may be a PFCP session report request, and the other information may be information carried in the session report request other than the first original message.
  • the UPF network element may also use the PFCP tunneling protocol to encapsulate the first message including the first original message to generate a second message, where the second message includes the first original message and For other original and other information in the first message, this encapsulation method can also be considered as an encapsulation method for encapsulating the first original message.
  • the UPF network element does not decapsulate the first message, and directly uses the PFCP tunneling protocol to encapsulate the first message.
  • the second message may be a PFCP session report request, or may be another message, for example, a PFCP session data transmission request.
  • the UPF network element sends the second message to the SMF network element.
  • the SMF network element decapsulates the second message using the PFCP tunneling protocol to obtain the first original message.
  • the SMF network element decapsulates the second message by using the same tunneling protocol (ie, PFCP tunneling protocol) as the first original message, thereby obtaining the first original message.
  • PFCP tunneling protocol ie, PFCP tunneling protocol
  • the following uses the encapsulation mode of mode A1 and the second message as a PFCP session establishment request as an example to briefly introduce the decapsulation process.
  • the SMF network element determines that the destination port and destination IP of the second packet are in the scope of the PFCP tunnel protocol, and the SMF network element parses the message header field of the second packet according to the definition of the PFCP tunnel protocol to determine that the message type is PFCP Node-level or session-level messages. If it is a session-level message, the session ID is obtained from the message header, the length of the entire message is obtained, and then each information element (IE) is parsed, and the type of each IE is determined in turn ( type) field to determine the type of the IE, and then parse the IE based on the type and the format of the IE in the standard.
  • IE information element
  • each IE After parsing each IE, continue to skip the content of the parsed IE based on the length of the IE, and continue to the next IE. Parsing, if the type is parsed to the type corresponding to the first original message (for example, UP signalling message information), then the complete original message encapsulated corresponding to the type is taken out. In this way, the decapsulation process is completed to obtain the first original message.
  • the type for example, UP signalling message information
  • the decapsulation process of the message by the network element is similar. The difference is that in different steps, the network element deciphers the message.
  • the tunneling protocol used for encapsulation may be different, but the way of decapsulation is the same. Therefore, the following description of the packet decapsulation processing by the network element can be referred to here. For brevity, it will not be described later.
  • the method for transmitting a message uses an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element to encapsulate a user plane data packet (for example, the first original packet Text), no longer using the existing GTP-U tunneling protocol to encapsulate user plane data packets, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • a user plane data packet for example, the first original packet Text
  • the UPF network element receives first information from the SMF network element, the first information including parameters corresponding to the PFCP tunneling protocol for encapsulating the first original message;
  • the UPF network element uses the packet forwarding control protocol PFCP tunneling protocol to encapsulate the first original message, including:
  • the UPF network element encapsulates the first original message according to the first information.
  • the PFCP session in order for the UPF network element to send messages to the SMF network element based on the PFCP tunnel protocol, for example, a response message to a PFCP session establishment request or a message that needs to be reported by other UPF network elements actively, the PFCP session
  • the establishment request carries the first information, and the first information may be referred to as CP information.
  • the parameters included in the first information for encapsulating the first original message include at least: an IP address, a message type, a session ID, and a message length of a destination CP network element (ie, SMF) for sending the message.
  • the port number (for example, port number 8805) in the parameters for encapsulating the first original message may be determined based on the PFCP tunneling protocol, and does not need to be carried in the first information and does not need a UPF network element buffer.
  • the UPF network element receives the packet detection information PDI from the SMF network element, which is used to describe the packet detection rule PDR;
  • the UPF network element uses the packet forwarding control protocol PFCP tunneling protocol to encapsulate the first original message, including:
  • the UPF network element obtains second information from a field corresponding to a forwarding operation rule FAR of the PDR according to the PDI, and the second information includes parameters corresponding to the PFCP tunneling protocol for encapsulating the first original message;
  • the UPF network element encapsulates the first original message according to the second information.
  • the SMF network element sends a PDI to the UPF network element through the PFCP session establishment request, which can be carried in the forwarder parameters of the FAR corresponding to the PDR.
  • the header of the IE is used for
  • the message is encapsulated with parameters (or, parameters related to the PFCP tunneling protocol).
  • the UPF network element successfully matches the received first packet with various parameters in the PDI, it can obtain the first original packet for encapsulation based on the outer header of the forwarder parameters in the FAR corresponding to the PDR. (Ie, the second information), and further, the parameter is used to encapsulate the first original message.
  • PDI is not limited to being carried in a PFCP session establishment request, and PDI can also be carried in a PFCP session modification request.
  • PDI can also be carried in a PFCP session modification request.
  • the second information further includes a field for indicating a PFCP tunneling protocol.
  • a related field may be added to the second information to instruct the UPF network element to use the PFCF tunneling protocol for encapsulation.
  • the UPF network element may know that the PFCP tunneling protocol is needed to encapsulate the message.
  • the second information may not include a field for indicating the PFCP tunneling protocol, but includes a parameter corresponding to the PFCP tunneling protocol for encapsulating the first original message. Since these parameters are related to the PFCP tunneling protocol and have been clearly defined in the standard, it is completely possible for the UPF network element to encapsulate the first original message through this parameter.
  • the embodiments of the present application provide the following methods:
  • the field of the FAR corresponding to the PDR does not include information for encapsulating the first original message using the GTP-U tunneling protocol of the user plane portion of the general packet radio service technology tunneling protocol.
  • the parameters of the forwarder and the header of the IE in the FAR no longer carry parameters about the GTP-U tunneling protocol, but are replaced with parameters about the PFCP tunneling protocol.
  • the receiving end in order for the receiving end to know that it has successfully received the message or data sent by the sending end, it can send a response message to the sending end.
  • the method further includes:
  • the SMF network element uses the PFCP tunneling protocol to encapsulate a second original message for the first original message to obtain a third message;
  • the SMF network element sends the third message to the UPF network element.
  • the second original message may be a response message for the first original message or other messages related to the first original message, which is not limited in the embodiment of the present application.
  • the third message is a message generated based on PFCP tunneling protocol encapsulation
  • the third message may also be referred to as a third PFCP message.
  • the third message may be response information for a PFCP session report request, for example, a PFCP session report response, and the third message may be response information for a PFCP session data transmission request, for example, a PFCP session data transmission response.
  • the third message may be decapsulated using the PFCP tunneling protocol to obtain the second original message; Therefore, the second original message is sent to the first network element.
  • the method for transmitting a message in this embodiment of the present application encapsulates a user plane data message (for example, a first original message) by using an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • the GTP-U tunnel protocol in the prior art is no longer used to encapsulate user plane data packets, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and also reduce the implementation complexity.
  • Table 1 is the information type in the PFCP session report request in the modified existing standard
  • Table 2 is the information type in the PFCP session report response in the modified existing standard.
  • Table 3 shows the information types of the existing standards. Among them, 58 corresponds to the newly added PFCP session data transmission request, and 59 corresponds to the newly added PFCP session data transmission response.
  • Table 4 shows the type of information in the PFCP session data transmission request
  • Table 5 shows the type of information in the PFCP session data transmission response.
  • Table 4 Information, Elements, PFCP, Session, Data, Transfer Request
  • Table 5 Information, Elements, PFCP, Session, Data, and TransferResponse
  • the SMF network element sends a PFCP session establishment request to the UPF network element.
  • the PFCP session establishment request includes a PDI for describing a PDR rule.
  • the parameters for describing the PDR in the PDI include flow description information, a fully qualified tunnel endpoint identifier (F-TEID), and an application. Identification, network instance, and other information that can describe the business flow.
  • the flow description information includes the tunnel endpoint identifier of the address.
  • the PFCP session establishment request further includes first information, and the first information may be referred to as CP information.
  • the parameters included in the first information for encapsulating the first original message include at least: an IP address, a message type, a session ID, and a message length of a destination CP network element (ie, SMF) for sending the message.
  • the port number (for example, port number 8805) in the parameters for encapsulating the first original message may be determined based on the PFCP tunneling protocol, and does not need to be carried in the first information and does not need a UPF network element buffer.
  • the standard may be defined as follows: the outer header of the IE corresponding to the FAR of the PDR includes parameters for encapsulating a message using the PFCF tunnel protocol (or parameters related to the PFCP tunnel protocol).
  • the UPF network element sends a PFCP session establishment response to the MFCP session establishment request to the SMF network element.
  • the UPF network element de-encapsulates the first message received from the data plane interface using a tunneling protocol corresponding to the data plane interface to obtain a first original message encapsulated in the first message.
  • the UPF network element receives the first message from other network elements through the data plane interface, and after successfully matching the first message with various parameters in the PDI, the tunneling protocol corresponding to the data plane interface is used for the first message. A message is decapsulated to obtain the first original message.
  • the UPF network element uses the PFCP tunneling protocol to encapsulate the first original message to obtain a second message.
  • the UPF network element may encapsulate the first original message based on the first information in the session establishment request, or may be based on the forwarding parameters from the FAR of the corresponding PDR.
  • the second information obtained in the outer header which is used to encapsulate the first original message, encapsulates the first original message.
  • Method 1 for a specific description of the manner in which the UPF network element encapsulates the first original message based on the first information, refer to the method 300 for a detailed description of Method 1 in which the UPF network element uses the PFCP tunneling protocol to encapsulate the first original message.
  • the manner in which the UPF network element uses the PFCP tunneling protocol to encapsulate the first original message may be the manner A1 and the manner A2 described above. For brevity, details are not described herein again.
  • the UPF network element sends the second message to the SMF network element.
  • the SMF network element decapsulates the second message using the PFCP tunneling protocol, and finally obtains the first original message.
  • the SMF network element uses the PFCP tunneling protocol to encapsulate a second original message for the first original message to obtain a third message.
  • the second original message may be a response message for the first original message or other messages related to the first original message, which is not limited in the embodiment of the present application.
  • the third message may be response information for a PFCP session report request, for example, a PFCP session report response, and the third message may be response information for a PFCP session data transmission request, for example, a PFCP session data transmission response.
  • the SMF network element sends the third message to the UPF network element.
  • the UPF network element uses the PFCP tunneling protocol to perform decapsulation processing on the third packet to obtain the second original packet.
  • the UPF network element After the UPF network element receives the third message sent by the SMF network element, it can use the PFCP tunneling protocol to decapsulate the third message to obtain the second original message.
  • the UPF network element uses the tunneling protocol corresponding to the data plane interface to encapsulate the second original message.
  • a UPF network element before a UPF network element can use any of the data plane interfaces of N3, N9, or N6 to send a message to the corresponding network element, it also needs to use a tunneling protocol corresponding to the corresponding data plane interface to encapsulate the second original message.
  • the UPF network element sends the encapsulated second original packet to other network elements (for example, access network equipment, other UPF network elements, or DN network elements), and is finally sent to the first network element.
  • network elements for example, access network equipment, other UPF network elements, or DN network elements
  • the SMF network element uses the packet forwarding control protocol PFCP tunneling protocol to encapsulate the fourth original message to obtain the fourth message.
  • the fourth original message needs to be sent to the first network element.
  • the first network element includes the following: Any one: terminal equipment, data network DN network element or other UPF network element.
  • the GTP-U tunneling protocol in the prior art is no longer used.
  • Encapsulate the fourth original message but directly encapsulate the fourth original message through the PFCP tunneling protocol on the signaling plane, that is, use the parameters for encapsulating the message using the encapsulated PFCP tunneling protocol to encapsulate the fourth original message.
  • Text For the parameters used for encapsulating packets using the encapsulation PFCP tunnel protocol, refer to the above. For brevity, we will not repeat them here.
  • the fourth original message may be an IP message or an Ethernet message, which is not limited in the embodiment of the present application, as long as the message is finally sent to the first network element, the fourth original message may be considered as the fourth original message.
  • the original message may be a message encapsulated with at least one of the following messages, where the at least one message includes at least: a delayed IP address allocation of DHCPv4 initiated by the SMF network element, and a routed IP address after the DHCPv6 mobile phone Distribution and IPv6 routers request RS / router advertisement RA, neighbor request RS / neighbor advertisement RA messages, and so on.
  • the fourth message may include only the fourth original message.
  • the fourth message may be a PFCP session modification request.
  • the fourth message may also include the fourth original message and other information, such as The fourth message may be a PFCP session data transmission request.
  • the fourth message is a message generated based on the PFCP tunneling protocol encapsulation
  • the fourth message may also be referred to as a fourth PFCP message.
  • the SMF network element sends the encapsulated fourth packet to the UPF network element.
  • the UPF network element uses the PFCP tunneling protocol to decapsulate the fourth packet to obtain the fourth original packet.
  • the UPF network element uses the same tunneling protocol (ie, the PFCP tunneling protocol) to encapsulate the fourth original message to decapsulate the fourth message, thereby obtaining the fourth original message.
  • the PFCP tunneling protocol ie, the PFCP tunneling protocol
  • the UPF network element can continue to encapsulate the fourth original message by using the tunnel protocol corresponding to the data plane interface (N3, N6, or N9), and send the encapsulated fourth original message to the first network element. .
  • the method for transmitting a message uses an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element to encapsulate a user plane data packet (for example, a fourth original packet).
  • a user plane data packet for example, a fourth original packet.
  • Text no longer using the existing GTP-U tunneling protocol to encapsulate user plane data packets, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the SMF network element sends a PFCP session establishment request to the UPF network element.
  • the PFCP session establishment request includes the PDI describing the PDR.
  • the GTP-U tunnel protocol encapsulates packets defined in the standard.
  • the method further includes:
  • the SMF network element sends the packet detection information PDI for describing the packet detection rule PDR to the UPF network element.
  • the field of the FAR corresponding to the PDR does not include the user plane part GTP-U for using the general packet radio service technology tunneling protocol. Information about decapsulation processing of the fourth packet by the tunneling protocol.
  • the IE's outer header and removal header in FAR no longer carry information used to decapsulate the message using the GTP-U tunneling protocol.
  • Table 6 shows the types of information in the PFCP session modification request.
  • the SMF network element sends a PFCP session establishment request to the UPF network element.
  • the UPF network element sends a PFCP session establishment response to the SMF network element.
  • the SMF network element uses the PFCP tunneling protocol to encapsulate the fourth original message to obtain a fourth message.
  • the fourth message may include only the fourth original message.
  • the fourth message may be a PFCP session modification request.
  • the fourth message may also include the fourth original message and other information, such as The fourth message may be a PFCP session data transmission request.
  • the SMF network element sends the fourth message to the UPF network element.
  • the UPF network element uses the PFCP tunneling protocol to decapsulate the fourth message to obtain the fourth original message.
  • the UPF network element may correspondingly decapsulate the fourth message using the PFCP tunneling protocol to obtain the fourth original message.
  • the UPF network element uses the tunneling protocol corresponding to the data plane interface to encapsulate the fourth original message.
  • a UPF network element before a UPF network element can use any of the data plane interfaces of N3, N9, or N6 to send a message to the corresponding network element, it also needs to use a tunneling protocol corresponding to the corresponding data plane interface to encapsulate the second original message.
  • the UPF network element sends the encapsulated fourth original message to other network elements (for example, access network equipment, other UPF network elements, or DN network elements), and finally sends the fourth original message to The first network element.
  • network elements for example, access network equipment, other UPF network elements, or DN network elements
  • FIG. 7 is a schematic block diagram of an apparatus 900 for transmitting a message according to an embodiment of the present application. As shown in FIG. 7, the apparatus 900 includes:
  • a processing unit 910 configured to obtain a first original message from a first network element by using the received first message, where the first network element includes any of the following: a terminal device, a data network DN network element, or another UPF network yuan;
  • the processing unit is further configured to use the packet forwarding control protocol PFCP tunneling protocol to encapsulate the first original message to obtain a second message;
  • the sending unit 920 is configured to send the second message to an SMF network element of the session management function entity.
  • the device for transmitting a message encapsulates a user plane data message (for example, a first original message) by using an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • a user plane data message for example, a first original message
  • an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • Text no longer using the existing GTP-U tunneling protocol to encapsulate user plane data packets, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the apparatus further includes:
  • a receiving unit 930 configured to receive first information from the SMF network element, where the first information includes parameters corresponding to the PFCP tunneling protocol and used to encapsulate the first original message;
  • the processing unit 910 is specifically configured to:
  • the UPF network element can use the first information sent by the SMF network element to the UPF network element in the prior art to encapsulate the first original message, which effectively reduces signaling overhead.
  • the apparatus further includes:
  • a receiving unit 930 configured to receive packet detection information PDI from the SMF network element, which is used to describe a packet detection rule PDR;
  • the processing unit 910 is specifically configured to:
  • the first original message is encapsulated by obtaining parameters corresponding to the PFCP tunneling protocol for encapsulating the first original message from the fields of the FAR corresponding to the PDR, so that the implementation of the solution changes the existing standard to a small extent, which is convenient. Implement the operation.
  • the field of the FAR corresponding to the PDR does not include information for encapsulating the first original message using a GTP-U tunneling protocol of a user plane part of a general packet radio service technology tunneling protocol.
  • the first original message is encapsulated by obtaining parameters corresponding to the PFCP tunneling protocol for encapsulating the first original message from the fields of the FAR corresponding to the PDR, so that the implementation of the solution changes the existing standard to a small extent, which is convenient. Implement the operation.
  • the second message is a PFCP session report request, or the second message is a PFCP session data transmission request.
  • the apparatus further includes:
  • a receiving unit 930 configured to receive a third message from the SMF network element that is encapsulated based on the PFCP tunneling protocol, where the third message includes a second original message for the first original message;
  • the processing unit 910 is further configured to perform decapsulation processing on the third message by using the PFCP tunneling protocol to obtain the second original message;
  • the sending unit 920 is further configured to send the second original packet to the first network element.
  • the third message is a PFCP session report response, or the third message is a PFCP session data transmission response.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • the device 900 for transmitting a message may correspond to (for example, may be configured on or itself) the UPF network element described in the above method 300 or 400, and each module or unit in the device 900 for transmitting a message is respectively used to execute Each action or process performed by the UPF network element in the foregoing method 300 or 400 is omitted here to avoid detailed description.
  • the device 900 may be a UPF network element.
  • the device 900 may include a processor, a transmitter, and a receiver. Processor, transmitter and receiver communication connections.
  • the apparatus further includes a memory, and the memory is communicatively connected with the processor.
  • the processor, the memory, the transmitter, and the receiver may be communicatively connected.
  • the memory may be used to store instructions.
  • the processor is configured to execute the instructions stored in the memory to control the transmitter to send a message or the receiver to receive a signal.
  • the processing unit 910 in the device 900 shown in FIG. 7 may correspond to a processor, and the sending unit 920 in the device 900 shown in FIG. 7 may correspond to a receiver.
  • the device 900 may be a chip (or a chip system) installed in a UPF network element.
  • the device 900 may include a processor and an input / output interface.
  • the processor may be communicatively connected with the transceiver of the network device through the input-output interface.
  • the apparatus further includes a memory, and the memory is communicatively connected with the processor.
  • the processor, the memory, and the transceiver may be communicatively connected.
  • the memory may be used to store instructions.
  • the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
  • the processing unit 910 in the device 900 shown in FIG. 7 may correspond to a processor, and the sending unit 920 in the device 900 shown in FIG. 7 may correspond to an output interface.
  • FIG. 8 is a schematic block diagram of an apparatus 1000 for transmitting a message according to an embodiment of the present application. As shown in FIG. 8, the device 1000 includes:
  • a receiving unit 1010 is configured to receive a second packet encapsulated by a user plane function UPF network element based on the PFCP tunneling protocol, where the second packet includes the first original packet and the first original packet.
  • the first network element includes any one of the following: a terminal device, a data network DN network element, or another UPF network element;
  • the processing unit 1020 is configured to perform decapsulation processing on the second message by using the packet forwarding control protocol PFCP tunneling protocol to obtain the first original message.
  • the device for transmitting a message encapsulates a user plane data message (for example, a first original message) by using an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • a user plane data message for example, a first original message
  • an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • Text no longer using the existing GTP-U tunneling protocol to encapsulate user plane data packets, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the apparatus further includes:
  • the sending unit 1030 is configured to send first information to the UPF network element, where the first information includes a parameter corresponding to the PFCP tunnel protocol and used to encapsulate the first original IP packet.
  • the device can use the first information sent by the SMF network element to the UPF network element in the prior art to encapsulate the first original message, which effectively reduces signaling overhead.
  • the apparatus further includes:
  • a sending unit 1030 is configured to send packet detection information PDI for describing a packet detection rule PDR to the UPF network element, where a field corresponding to the forwarding operation rule FAR of the PDR includes second information, the second information Including parameters corresponding to the PFCP tunneling protocol for encapsulating the first original IP packet.
  • the first original message is encapsulated by obtaining parameters corresponding to the PFCP tunneling protocol for encapsulating the first original message from the fields of the FAR corresponding to the PDR, so that the implementation of the solution changes the existing standard to a small extent, which is convenient. Implement the operation.
  • the field of the FAR corresponding to the PDR does not include information for encapsulating the first original IP message using a GTP-U tunneling protocol of a user plane portion of a general packet radio service technology tunneling protocol.
  • the UPF network element can clearly know that the first original message is encapsulated using the PFCP tunneling protocol.
  • the second message is a PFCP session report request, or the second message is a PFCP session data transmission request.
  • processing unit 1020 is further configured to:
  • the device further includes:
  • a sending unit configured to send the third message to the UPF network element.
  • the third message is a PFCP session report response, or the third message is a PFCP session data transmission response.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • the device 1000 for transmitting a message may correspond to (for example, may be configured on or itself) the SMF network element described in the above method 300 or 400, and each module or unit in the device 1000 for transmitting a message is respectively used to execute Each action or processing process performed by the SMF network element in the foregoing method 300 or 400 is omitted here to avoid detailed description.
  • the device 1000 may be an SMF network element.
  • the device 1000 may include a processor, a transmitter, and a receiver. Processor, transmitter and receiver communication connections.
  • the apparatus further includes a memory, and the memory is communicatively connected with the processor.
  • the processor, the memory, the transmitter, and the receiver may be communicatively connected.
  • the memory may be used to store instructions.
  • the processor is configured to execute the instructions stored in the memory to control the transmitter to send a message or the receiver to receive a signal.
  • the receiving unit 1010 in the device 1000 shown in FIG. 8 may correspond to a receiver
  • the processing unit 1020 in the device 1000 shown in FIG. 8 may correspond to a processor
  • the device 1000 may be a chip (or a chip system) installed in a UPF network element.
  • the device 1000 may include a processor and an input / output interface.
  • the processor may be communicatively connected with the transceiver of the network device through the input-output interface.
  • the apparatus further includes a memory, and the memory is communicatively connected with the processor.
  • the processor, the memory, and the transceiver may be communicatively connected, the memory may be used to store instructions, and the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
  • the receiving unit 1010 in the apparatus 1000 shown in FIG. 8 may correspond to the input interface.
  • the processing unit 1020 in the apparatus 1000 shown in FIG. 8 may correspond to a processor.
  • FIG. 9 is a schematic block diagram of a packet transmission apparatus 1100 according to an embodiment of the present application. As shown in FIG. 9, the apparatus 1100 includes:
  • a processing unit 1110 is configured to use a packet forwarding control protocol PFCP tunneling protocol to encapsulate a fourth original message to obtain a fourth message.
  • the fourth original message needs to be sent to a first network element, where the first network element includes Any of the following: terminal equipment, data network DN network element, or other UPF network element;
  • the sending unit 1120 is configured to send the fourth packet to a user plane function UPF network element.
  • the device for transmitting a message encapsulates a user plane data message (for example, a fourth original message) by using an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • a user plane data message for example, a fourth original message
  • an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • Text no longer using the existing GTP-U tunneling protocol to encapsulate user plane data packets, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the sending unit 1120 is further configured to:
  • the UPF network element can clearly know that the fourth message is decompressed using the PFCP tunnel protocol Encapsulation processing.
  • the fourth message is a PFCP session modification request, or the fourth message is a PFCP session data transmission request.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • the device 1100 for transmitting a message may correspond to (for example, may be configured on or itself) the SMF network element described in the above method 600 or 700, and each module or unit in the device 1100 for transmitting a message is respectively used to execute Each action or processing performed by the SMF network element in the foregoing method 600 or 700 is omitted here to avoid detailed description.
  • the device 1100 may be an SMF network element.
  • the device 1100 may include a processor, a transmitter, and a receiver. Processor, transmitter and receiver communication connections.
  • the apparatus further includes a memory, and the memory is communicatively connected with the processor.
  • the processor, the memory, the transmitter, and the receiver may be communicatively connected.
  • the memory may be used to store instructions.
  • the processor is configured to execute the instructions stored in the memory to control the transmitter to send a message or the receiver to receive a signal.
  • the processing unit 1110 in the device 1100 shown in FIG. 9 may correspond to a processor, and the sending unit 1120 in the device 1100 shown in FIG. 9 may correspond to a transmitter.
  • the device 1100 may be a chip (or a chip system) installed in a UPF network element.
  • the device 1100 may include a processor and an input / output interface.
  • the processor may be communicatively connected with the transceiver of the network device through the input-output interface.
  • the device further includes a memory, and the memory is communicatively connected to the processor.
  • the processor, the memory, and the transceiver may be communicatively connected.
  • the memory may be used to store instructions.
  • the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
  • processing unit 1110 in the device 1100 shown in FIG. 9 may correspond to a processor, and the sending unit 1120 in the device 1100 shown in FIG. 9 may correspond to an output interface.
  • FIG. 10 is a schematic block diagram of a packet transmission apparatus 1200 according to an embodiment of the present application. As shown in FIG. 10, the apparatus 1200 includes:
  • the receiving unit 1210 is configured to receive a fourth message sent by the SMF network element of the session management function entity.
  • the fourth message includes a fourth original message sent to the first network element, and the first network element includes any one of the following: Terminal equipment, data network DN network element or other UPF network element;
  • the processing unit 1220 is configured to perform decapsulation processing on the fourth packet by using a packet forwarding control protocol PFCP tunneling protocol to obtain the fourth original packet.
  • the device for transmitting a message encapsulates a user plane data message (for example, a fourth original message) by using an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • a user plane data message for example, a fourth original message
  • an existing PFCP tunneling protocol for signaling between a UPF network element and an SMF network element.
  • Text no longer using the existing GTP-U tunneling protocol to encapsulate user plane data packets, which can effectively simplify the allocation and buffering of tunnel resources, save system resources, and at the same time reduce implementation complexity.
  • the receiving unit 1210 is further configured to:
  • Receive packet detection information PDI used to describe a packet detection rule PDR sent by the SMF network element, wherein a field of the FAR corresponding to the PDR does not include a user plane portion GTP-U for using a general packet radio service technology tunneling protocol Information for performing decapsulation processing on the fourth packet by the tunneling protocol.
  • the UPF network element can clearly know that the fourth message is decompressed using the PFCP tunnel protocol Encapsulation processing.
  • the fourth message is a PFCP session modification request, or the fourth message is a PFCP session data transmission request.
  • the signaling overhead can be effectively reduced and resources can be saved.
  • the device 1200 for transmitting a message may correspond to (for example, may be configured on or itself) the UPF network element described in the above method 600 or 700, and each module or unit in the device 1200 for transmitting a message is respectively used for execution Each action or processing performed by the UPF network element in the foregoing method 600 or 700 is omitted here to avoid detailed description.
  • the device 1200 may be a UPF network element.
  • the device 1200 may include a processor, a transmitter, and a receiver. Processor, transmitter and receiver communication connections.
  • the apparatus further includes a memory, and the memory is communicatively connected with the processor.
  • the processor, the memory, the transmitter, and the receiver may be communicatively connected.
  • the memory may be used to store instructions.
  • the processor is configured to execute the instructions stored in the memory to control the transmitter to send a message or the receiver to receive a signal.
  • the receiving unit 1210 in the device 1200 shown in FIG. 10 may correspond to a receiver
  • the processing unit 1220 in the device 1200 shown in FIG. 10 may correspond to a processor
  • the device 1200 may be a chip (or a chip system) installed in a UPF network element.
  • the device 1200 may include a processor and an input / output interface.
  • the processor may be communicatively connected with the transceiver of the network device through the input-output interface.
  • the apparatus further includes a memory, and the memory is communicatively connected with the processor.
  • the processor, the memory, and the transceiver may be communicatively connected.
  • the memory may be used to store instructions.
  • the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
  • the receiving unit 1210 in the device 1200 shown in FIG. 10 may correspond to an input interface
  • the processing unit 1220 in the device 1200 shown in FIG. 10 may correspond to a processor
  • the foregoing method embodiments in the embodiments of the present application may be applied to a processor or implemented by a processor.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by using an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the above processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly implemented by a hardware decoding processor, or may be performed by using a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the foregoing method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrical memory Erase a programmable read-only memory (electrical ROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double SDRAM double SDRAM
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • enhanced SDRAM enhanced SDRAM
  • SLDRAM synchronous connection dynamic random access memory
  • direct RAMbus RAM direct RAMbus RAM
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks or compact discs and other media that can store program codes .

Abstract

La présente invention concerne un procédé et un appareil pour transmettre un message. Le procédé comprend les étapes suivantes : un élément de réseau de plan d'utilisateur effectue un traitement de désencapsulation sur un premier message reçu pour obtenir un premier message d'origine à partir d'un premier élément de réseau ; encapsuler le premier message d'origine par utilisation d'un protocole de tunnel PFCP ; et envoyer un second message généré à un élément de réseau de gestion de session. De cette manière, des ressources de tunnel allouées et mises en mémoire cache peuvent être efficacement simplifiées, des ressources de système peuvent être économisées, et la complexité peut également être réduite en même temps.
PCT/CN2019/099287 2018-08-10 2019-08-05 Procédé et appareil de transmission de message WO2020029922A1 (fr)

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