WO2022183497A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2022183497A1
WO2022183497A1 PCT/CN2021/079363 CN2021079363W WO2022183497A1 WO 2022183497 A1 WO2022183497 A1 WO 2022183497A1 CN 2021079363 W CN2021079363 W CN 2021079363W WO 2022183497 A1 WO2022183497 A1 WO 2022183497A1
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WIPO (PCT)
Prior art keywords
pdu session
network element
service
policy
session
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PCT/CN2021/079363
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English (en)
Chinese (zh)
Inventor
席国宝
陆长奇
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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
Priority to CN202180088714.0A priority Critical patent/CN116724659A/zh
Priority to PCT/CN2021/079363 priority patent/WO2022183497A1/fr
Publication of WO2022183497A1 publication Critical patent/WO2022183497A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present application relates to the field of communication, and more particularly, to a communication method and a communication device.
  • network slicing technology In the 5th-generation (5G) independent networking (standalone, SA) architecture, in order to support diverse business requirements and scenarios, network slicing technology is introduced.
  • the introduction of network slicing technology can form an end-to-end (E2E) network slicing solution, and by establishing a new network slice, the protection and isolation of specific services in the E2E network connection can be realized.
  • E2E end-to-end
  • the terminal can create a dedicated slice at the beginning of the service to carry the service and provide service guarantee. And because the service is carried through a specific slice at the beginning, there is no service switching between slices in the middle, and the service will not be interrupted.
  • this method is aimed at all users, which means that each user who uses the service needs to establish a dedicated slice, and the operating cost will be relatively high for service manufacturers.
  • the terminal can also use the default slice that carries all services first, and then switch the service to a specific slice when necessary, such as when the service experience is poor and the service experience needs to be improved. In this way, slices can be dynamically established only for specific users, and the operating cost is lower for service manufacturers. However, when the terminal switches the service to a new slice, in some service scenarios, such as a game battle, the service will be interrupted and the user's service experience will be affected.
  • the present application provides a communication method and a communication device, so that the terminal can ensure that the service is not interrupted during the process of switching slices.
  • a communication method including: a session management network element obtains a first Internetworking Protocol IP corresponding to a first protocol data unit PDU session, the first PDU session corresponding to a first service of a first terminal ; the session management network element establishes a second PDU session, the second PDU session corresponds to the first service of the first terminal; the session management network element allocates the first IP for the second PDU session.
  • the session management network element may allocate the first IP corresponding to the first PDU session to the second PDU session, so that the terminal keeps the IP unchanged during the process of switching slices for the first service, which can avoid the first IP
  • the service is interrupted by re-establishing a service connection using a new IP on a new slice, which helps to improve the user's service experience.
  • the method further includes: the session management network element receives a first policy, where the first policy is used to indicate that the first service of the first terminal is in the first A split mode between a PDU session and the second PDU session; wherein, the session management network element assigning a first IP to the second PDU session includes: the session management network element assigns the second PDU session to the second PDU session according to the first policy Assign the first IP.
  • the method further includes: acquiring, by the session management network element, a first service identifier, where the first service identifier is used to indicate the first service of the first terminal;
  • the session management network element obtains a first slice identifier, where the first slice identifier is used to indicate a slice corresponding to the second PDU session; wherein, the session management network element allocates a first IP for the second PDU session, including :
  • the session management network element allocates the first IP to the second PDU session according to the first service identifier and the first slice identifier.
  • acquiring the first service identifier by the session management network element includes: the session management network element acquires the first service identifier from the policy control network element.
  • acquiring the first slice identifier by the session management network element includes: the session management network element acquires the first slice identifier from the unified data management network element.
  • the session management network element when establishing a dedicated second PDU session for the first service of the first terminal, allocates the first IP corresponding to the first PDU session to the second PDU session, so that the terminal is in the Keeping the IP unchanged during the process of switching slices for the first service can avoid service interruption caused by re-establishing a service connection for the first service using a new IP on a new slice, which helps to improve user service experience.
  • a communication method including: a policy control network element generates a first policy, where the first policy is used to indicate an offload mode of the first service of the first terminal between the first PDU session and the second PDU session ; the policy control network element sends the first policy to the session management network element, and the session management network element is used for allocating a first IP to the second PDU session according to the first policy.
  • the method further includes: the policy control network element receives a first request, where the first request is used to request to establish the first service for the first terminal.
  • generating the first policy by the policy control network element according to the first request includes: the policy control network element generating the first policy and the second policy, where the second policy is used to indicate the distribution mode of the first service of the first terminal on the first PDU session and the second PDU session; the policy controls the network element to send the first terminal to the the second strategy, so that the first terminal can select the second PDU session for the first service according to the second strategy.
  • the policy control network element may generate the first policy and the second policy according to the received request, and provide the terminal-side device and the network-side device with an uplink and downlink data distribution method, so that the session management network element can
  • the data offloading strategy allocates the first IP corresponding to the first PDU session to the second PDU session, so that the terminal keeps the IP unchanged during the process of switching slices for the first service, which can prevent the first service from using a new one on a new slice.
  • the service is interrupted due to the re-establishment of the service connection through the IP address of the IP address, which helps to improve the service experience of users.
  • a communication method including: a mobility management network element determining a first session management network element, where the first session management network element is configured to assign a first IP address corresponding to the first PDU session to a second PDU session , the first session management network element is a session management network element that establishes the first PDU session, and the first PDU session and the second PDU session correspond to the first service of the first terminal.
  • the method further includes: acquiring, by the mobility management network element, a first service identifier and a first slice identifier, where the first service identifier is used to indicate the first For the first service of the terminal, the first slice identifier is used to indicate a slice corresponding to the second PDU session; wherein, the mobility management network element determines the first session management network element, including: the mobility management network element The first session management network element is determined according to the first service identifier and the first slice identifier.
  • the mobility management network element acquiring the first service identifier and the first slice identifier includes: the mobility management network element receiving the first service identifier from the first terminal. Two PDU session establishment request, where the second PDU session establishment request includes the first service identifier and the first slice identifier.
  • the mobility management network element selects the first session management network element for the second PDU session, that is, the session management network element for establishing the first PDU session, so that the first session management network element is established for the second PDU session.
  • the session management network element can allocate the first IP corresponding to the first PDU session to the second PDU session, so that the terminal keeps the IP unchanged during the process of switching slices for the first service, which can prevent the first service from being used on a new slice
  • the new IP re-establishes the service connection and causes the service to be interrupted, which helps to improve the user's service experience.
  • a communication method comprising: a user plane network element receiving indication information from a session management network element, where the indication information includes a first IP, the first IP corresponds to a first PDU session, the first PDU The session corresponds to the first service of the first terminal; the user plane network element establishes a second PDU session according to the indication information, the second PDU session corresponds to the first IP, and the second PDU session corresponds to the first terminal. corresponding to the first business.
  • the method further includes: the user plane network element receiving a first policy from the session management network element, where the first policy is used to indicate the first terminal's The offload mode of the first service on the first PDU session and the second PDU session; the user plane network element establishes a first tunnel and a second tunnel, the first tunnel is the tunnel corresponding to the first PDU session, and the first tunnel is the tunnel corresponding to the first PDU session.
  • the two tunnels are used for data transmission between the first PDU session and the second PDU session; the user plane network element performs data transmission on the first tunnel or the second tunnel according to the first policy.
  • the user plane network element establishes the second PDU session by receiving the first IP assigned by the session management network element, so that when it receives the data stream of the first service, it can transmit the first IP on the dedicated slice.
  • the data of the service is distributed through the first tunnel or the second tunnel according to the first policy, so that the terminal keeps the IP unchanged during the process of switching slices for the first service, which can prevent the first service from being on the new slice. Service interruption caused by re-establishing a service connection using a new IP helps improve user service experience.
  • a communication device comprising: an acquiring unit, the acquiring unit is configured to acquire a first IP corresponding to a first protocol data unit PDU session, the first PDU session corresponding to a first service of a first terminal ; processing unit, this processing unit is used for establishing the second PDU session, and this second PDU session is corresponding with this first business of this first terminal; This processing unit is also used for this second PDU session allocating this first IP .
  • the apparatus further includes: a transceiver unit, where the transceiver unit is configured to receive a first policy, where the first policy is used to indicate the first service of the first terminal The offloading mode on the first PDU session and the second PDU session; wherein, the processing unit is further specifically configured to allocate the first IP to the second PDU session according to the first policy.
  • the acquiring unit is further configured to acquire a first service identifier, where the first service identifier is used to indicate the first service of the first terminal; the acquiring unit is further for obtaining the first slice identifier, the first slice identifier is used to indicate the slice corresponding to the second PDU session; wherein, the processing unit is also specifically used for according to the first service identifier and the first slice identifier The first IP is allocated for the second PDU session.
  • the obtaining unit is further specifically configured to obtain the first service identifier from the policy control network element.
  • the obtaining unit is further specifically configured to obtain the first slice identifier from the unified data management network element.
  • a communication device comprising: a processing unit, where the processing unit is configured to generate a first policy, where the first policy is used to indicate that the first service of the first terminal is in a first PDU session and a second PDU session The offloading method on the above; a transceiver unit, the transceiver unit is configured to send the first policy to a session management network element, and the session management network element is configured to allocate a first IP for the second PDU session according to the first policy.
  • the transceiver unit is further configured to receive a first request, where the first request is used to request to establish the second PDU session for the first service of the first terminal ; wherein, the processing unit is specifically configured to generate the first policy according to the first request.
  • the processing unit is specifically configured to generate the first policy and the second policy according to the first request, and the second policy is used to indicate the first terminal's The offloading mode of the first service on the first PDU session and the second PDU session; the transceiver unit is further configured to send the second policy to the first terminal, so that the first terminal can be The first service selects the second PDU session.
  • a communication device comprising: a determining unit, the determining unit is configured to determine a first session management network element, and the first session management network element is configured to allocate a second PDU session corresponding to the first PDU session
  • the first IP, the first session management network element is a session management network element that establishes the first PDU session, and the first PDU session and the second PDU session correspond to the first service of the first terminal.
  • the device further includes: an acquisition unit, where the acquisition unit is configured to acquire a first service identifier and a first slice identifier, where the first service identifier is used to indicate the For the first service of the first terminal, the first slice identifier is used to indicate a slice corresponding to the second PDU session; wherein, the determining unit is specifically configured to determine according to the first service identifier and the first slice identifier The first session management network element.
  • the obtaining unit is specifically configured to receive the second PDU session establishment request from the first terminal, where the second PDU session establishment request includes the first service identifier and the The first slice identifier.
  • a communication device comprising: a transceiver unit configured to receive a first IP allocated by a session management network element, where the first IP corresponds to a first PDU session; a processing unit, the processing unit for establishing a second PDU session according to the first IP, where the first PDU session and the second PDU session correspond to the first service of the first terminal.
  • the transceiver unit is further configured to receive a first policy from the session management network element, where the first policy is used to indicate that the first service of the first terminal is in The offloading mode on the first PDU session and the second PDU session; the processing unit is further configured to establish a first tunnel and a second tunnel, the first tunnel is the tunnel corresponding to the first PDU session, and the second tunnel uses for data transmission between the first PDU session and the second PDU session; the transceiver unit is also used for data transmission on the first tunnel or the second tunnel according to the first policy.
  • a communication device comprising: a memory for storing a computer program; a processor for executing part or all of the computer program stored in the memory, so that the device The method of any one of the first to fourth aspects is performed.
  • a tenth aspect provides a computer-readable storage medium, characterized by comprising a computer program, when part or all of the computer program is run on a computer, causing the computer to execute any one of the first to fourth aspects method described in item.
  • a computer program product comprising a computer program which, when run on a computer, causes the computer to perform the method according to any one of the first to fourth aspects.
  • a twelfth aspect provides a communication system, including the communication device according to any one of the fifth to eighth aspects.
  • FIG. 1 is a schematic diagram of a network architecture suitable for the method provided by the embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a method for establishing a tunnel provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a data distribution manner provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • the technical solutions provided in this application can be applied to various communication systems, for example, a fifth generation (5th Generation, 5G) mobile communication system or a new radio access technology (NR).
  • the 5G mobile communication system may include a non-standalone (NSA, NSA) and/or an independent network (standalone, SA).
  • NSA non-standalone
  • SA independent network
  • the basic services that the core network can provide include mobile office, e-commerce, communications, entertainment services, travel and location-based services, telemetry, simple messaging (monitoring and control), and so on.
  • the functions of the core network are mainly to provide user connections, manage users, and carry out services, and serve as an interface to the external network as the bearer network.
  • the establishment of user connection includes functions such as mobility management (mobile management, MM), call management (connection management, CM), switching/routing, and recording notification.
  • User management includes user description, quality of service (QoS), user communication records (accounting), virtual home environment (VHE) and security (corresponding security measures provided by the authentication center include Security management of mobile services and security processing of access to external networks).
  • Bearer connections include access to external public switched telephone networks (PSTNs), external circuit data networks and packet data networks, the internet and intranets, and mobile phone texting on the mobile network itself Service (Short Message Service, SMS) server and so on.
  • PSTNs public switched telephone networks
  • SMS Short
  • the core network equipment may include: an access and mobility management function (AMF), a session management function (SMF), a policy control function (PCF), User plane function (UPF) and other functional units, these functional units can work independently, or can be combined together to achieve some control functions, such as: AMF, SMF and PCF can be combined as a management device to complete Access control and mobility management functions such as access authentication, security encryption, and location registration of terminal devices, as well as session management functions such as establishment, release, and modification of user plane transmission paths, and analysis of some slice-related data (such as congestion), terminal device-related data functions, UPF mainly completes user plane data routing and forwarding functions, such as: responsible for data packet filtering, data transmission/forwarding, rate control, and generation of billing information for terminal devices.
  • AMF access and mobility management function
  • SMF session management function
  • PCF policy control function
  • UPF User plane function
  • the access network consists of a series of transport entities (such as line equipment and transmission facilities) between the service node interface (service network interface, SNI) and the user-network interface (user network interface, UNI).
  • the implementation system providing the required transport bearer capacity for supplying telecommunication services can be configured and managed via the management interface (Q3).
  • Q3 management interface
  • the access network does not interpret signaling, and the access network can be regarded as a transport network irrelevant to services and applications, which mainly completes cross-connection, multiplexing and transmission functions.
  • the access network equipment may include access network/radio access network (RAN) equipment, a network composed of multiple 5G-RAN nodes, and the 5G-RAN nodes may be: access points (access point, AP) ), next-generation new base station (NR nodeB, gNB), next-generation evolved base station (ng-eNB, gNB), transmission receive point (TRP), transmission point (TP), or some other access node.
  • the 5G-RAN node can be further divided into a centralized unit (CU) and a distributed unit (DU).
  • the access network equipment may also be a base station (base transceiver Station, BTS) in SM or CDMA, a base station (NodeB, NB) in WCDMA, or an evolutional Node B (evolutional Node B) in LTE, eNB or eNodeB), or relay station or access point, or in-vehicle equipment, wearable equipment, and access network equipment in future 5G networks or access network equipment in future evolved PLMN networks, etc., which are not particularly limited in this application.
  • BTS base transceiver Station
  • NodeB base station
  • NB base station
  • WCDMA Wideband Code Division Multiple Access
  • an evolutional Node B evolutional Node B
  • relay station or access point or in-vehicle equipment, wearable equipment, and access network equipment in future 5G networks or access network equipment in future evolved PLMN networks, etc.
  • an access network device may provide services for a cell, and a terminal device communicates with the access network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell.
  • the cell can be a cell corresponding to an access network device (such as a base station), the cell can belong to a macro base station, or it can belong to a base station corresponding to a small cell (Small cell), where the small cell can include: urban cell (metro cell) , micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • a terminal device, a core network device, or an access 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 central processing unit (CPU), memory management unit (MMU), and 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.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the present application do not specifically limit the specific structure of the execution body of the methods provided by the embodiments of the present application, as long as the program that records the codes of the methods provided by the embodiments of the present application can be executed to provide the methods provided by the embodiments of the present application.
  • the execution subject of the method provided by the embodiment of the present application may be a terminal device, core network device or access network device, or a terminal device, core network device or access network device that can call program and execute the program's functional modules.
  • multiple application programs may be run at the application layer.
  • the application program that executes the method of this embodiment of the present application is the same as the application program used to control the receiving end device to complete the received data processing.
  • the application of the corresponding action may be a different application.
  • FIG. 1 An application scenario of the embodiments of the present application is first described in detail with reference to FIG. 1 .
  • FIG. 1 is a schematic diagram of a network architecture suitable for the method provided by the embodiment of the present application.
  • the network architecture shown in Figure 1 may specifically include the following network elements:
  • User equipment can be called terminal equipment, terminal, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless communication equipment, User Agent or User Device.
  • the UE may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication capability handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or terminals in future evolved public land mobile networks (PLMN) Devices, etc.
  • PLMN public land mobile networks
  • PLMN public land mobile networks
  • the UE may also be terminal devices, logical entities, smart devices, such as terminal devices such as mobile phones and smart terminals, or communication devices such as servers, gateways, base stations, controllers, or IoT devices, such as sensors, electricity meters, water meters, etc. Internet of things (IoT) devices.
  • Access network It provides network access functions for authorized users in a specific area, and can use different quality transmission tunnels according to user levels and business needs.
  • the access network may be an access network using different access technologies.
  • 3GPP 3rd Generation Partnership Project
  • non-3GPP non-3rd generation cooperation Partnership Project
  • 3GPP access technology refers to the access technology that conforms to 3GPP standard specifications.
  • the access network using 3GPP access technology is called Radio Access Network (RAN).
  • RAN Radio Access Network
  • gNB Next generation Node Base station
  • a non-3GPP access technology refers to an access technology that does not conform to 3GPP standard specifications, for example, an air interface technology represented by an access point (AP) in wifi.
  • AP access point
  • An access network that implements an access network function based on a wired communication technology may be referred to as a wired access network.
  • An access network that implements access network functions based on wireless communication technology can be called a radio access network (RAN).
  • the radio access network can manage radio resources, provide access services for terminals, and then complete the forwarding of control signals and user data between the terminal and the core network.
  • the radio access network can be, for example, a base station (NodeB), an evolved NodeB (evolved NodeB, eNB or eNodeB), a base station (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an AP in a WiFi system, etc., It can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the access network device can be a relay station, an access point, an in-vehicle device, a wearable device, and a network in the future 5G network equipment or network equipment in a future evolved PLMN network, etc.
  • CRAN cloud radio access network
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.
  • Access and mobility management function mainly used for mobility management and access management, etc., and can be used to implement mobility management entity (mobility management entity, MME) functions in addition to session management Other functions other than that, such as lawful interception, or access authorization (or authentication) and other functions.
  • MME mobility management entity
  • the functions of the access and mobility management network elements can be implemented.
  • Session management function mainly used for session management, UE's Internet Protocol (IP) address allocation and management, selection of manageable user plane functions, policy control, or charging function interfaces
  • IP Internet Protocol
  • it can be used to implement the function of the session management network element.
  • User plane function that is, a data plane gateway. It can be used for packet routing and forwarding, or quality of service (QoS) processing of user plane data. User data can be accessed to the data network through this network element. In this embodiment of the present application, it can be used to implement the function of the user plane gateway.
  • QoS quality of service
  • Data network a network for providing data transmission.
  • DN data network
  • an operator's service network an Internet (Internet) network
  • Internet Internet
  • third-party service network a third-party service network
  • AUSF Authentication server function
  • Network exposure function used to securely open services and capabilities provided by the 3GPP network function to the outside world.
  • Network storage function (network function (NF) repository function, NRF): used to store the description information of network function entities and the services they provide, as well as support service discovery, network element entity discovery, etc.
  • PCF Policy control function
  • Unified data management used to handle user identification, access authentication, registration, or mobility management, etc.
  • Application function used for data routing affected by applications, accessing network open function network elements, or interacting with the policy framework for policy control, etc.
  • a set of network elements such as AMF, SMF, and UDM may be called a control plane function (Control Plane Function, CPF) network element.
  • CPF Control Plane Function
  • network element may also be referred to as an entity, a device, an apparatus, or a module, etc., which is not particularly limited in this application.
  • SMF SMF network element
  • SMF SMF network element
  • network elements or functions may be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (eg, a cloud platform).
  • the N1 interface is the reference point between the terminal and the AMF;
  • the N2 interface is the reference point between the AN and the AMF, which is used for sending non-access stratum (NAS) messages;
  • the N3 interface is the (R) The reference point between the AN and the UPF, which is used to transmit data on the user plane, etc.;
  • the N4 interface is the reference point between the SMF and the UPF, which is used to transmit, for example, the tunnel identification information of the N3 connection, the data buffer indication information, and Downlink data notification messages and other information;
  • the N6 interface is the reference point between the UPF and the DN, and is used to transmit data on the user plane.
  • the name of the interface between each network element in FIG. 1 is just an example, and the name of the interface in the specific implementation may be other names, which are not specifically limited in this application.
  • the names of the messages (or signaling) transmitted between the above network elements are only an example, and do not constitute any limitation on the functions of the messages themselves.
  • the above-mentioned network architecture applied to the embodiments of the present application is only a network architecture described from the perspective of a traditional point-to-point architecture and a service-oriented architecture, and the network architecture applicable to the embodiments of the present application is not limited thereto. Any network architecture capable of implementing the functions of the foregoing network elements is applicable to the embodiments of the present application.
  • AMF network elements SMF network elements, UPF network elements, NSSF network elements, NEF network elements, AUSF network elements, NRF network elements, PCF network elements, and UDM network elements shown in FIG. 1 can be understood as The network elements used to implement different functions in the core network, for example, can be combined into network slices as needed. These core network elements may be independent devices, or may be integrated in the same device to implement different functions, which is not limited in this application.
  • a device that performs core network element functions may also be referred to as a core network device or a network device.
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the session management network element obtains the first IP corresponding to the first protocol data unit (protocol data unit, PDU) session, and allocates the second PDU session to the second PDU session when establishing the second PDU session.
  • PDU protocol data unit
  • One IP so that the terminal device can keep the IP of the terminal unchanged after switching slices for the same service, thereby avoiding the interruption of the service.
  • the solution shown in FIG. 2 may specifically include the following steps.
  • the session management network element acquires a first IP corresponding to a first PDU session, where the first PDU session corresponds to a first service of a first terminal.
  • the terminal can provide the AMF with single network slice selection assistance information (Single Network Slice Selection Assistance Information, S-NSSAI) and data network name (DNN) when initiating the establishment of a PDU session.
  • AMF determines the address of the session management network element based on S-NSSAI, DNN and other information (such as terminal subscription information and local operator policies, etc.), and the determined session management network element establishes a PDU session for the terminal based on S-NSSAI and DNN .
  • the session management network element when the session management network element establishes the first PDU session for the first terminal, it can acquire the IP corresponding to the first service of the first terminal in the first PDU session, that is, the first IP.
  • the first PDU session bears all services of the first terminal, and the all services include the first services that need to switch slices.
  • the policy control network element generates a first policy, where the first policy is used to indicate a distribution mode of the first service of the first terminal on the first PDU session and the second PDU session.
  • the policy control network element When the service manufacturer detects that the experience of the first service on the first terminal is not good, it is hoped that the first service on the first terminal can be switched to the dedicated slice, so the policy control network element can be based on the request of these service manufacturers. , to generate the first strategy.
  • the first policy When the network-side device receives the data flow of the first service, the first policy may be used to indicate a distribution mode of the data flow between the first PDU session and the second PDU session. It should be understood that the policy control network element may generate the first policy according to the first request of the service manufacturer, and may also receive the request for data offloading for the first service of the first terminal in other manners, and then generate the first policy. In this application, the manner in which the policy control network element generates the first policy is only given as an example, and is not limited.
  • the policy control network element sends the first policy to a session management network element, where the session management network element is configured to allocate the first IP to the second PDU session according to the first policy.
  • the first policy may be used to instruct the session management network element to establish a second PDU session for the same service of the same terminal, and the second PDU session requires the same IP as the first PDU session. Therefore, the session management network element receives the first policy sent by the policy control network element in the first PDU session, which is also equivalent to receiving an instruction to allocate the first IP for the second PDU session when the second PDU session is established. Moreover, after the establishment of the second PDU session is completed, the downlink data streams of different services may be offloaded according to the manner indicated by the first policy.
  • the policy control network element may also generate a second policy, send the second policy to the terminal device, and instruct the terminal device to perform offload processing on uplink data of different services.
  • the mobility management network element determines a first session management network element, where the first session management network element is used to allocate a first IP corresponding to the first PDU session for the second PDU session, and the first session management network element is used for establishing the first IP session.
  • a session management network element of a PDU session, the first PDU session and the second PDU session correspond to the first service of the first terminal.
  • the mobility management network element In the process of establishing the second PDU session for the first service of the first terminal, the mobility management network element needs to determine a session management network element for the second PDU session, and the session management network element may be the second session management network element in the subsequent steps.
  • PDU session assigns IP. Specifically, in order to ensure that the IP allocated for the second PDU session is the same as the IP of the first PDU session, the session management network element determined by the mobility management network element for the second PDU session should be able to obtain the IP of the first PDU session.
  • the session management network element determined for the second PDU session may be the same as the session management network element for establishing the first PDU session, that is, the mobility management network element determines the first session management network element, and the first session management network element The first IP corresponding to the first PDU session is recorded in the meta.
  • the session management network element that establishes the second PDU session can obtain the IP allocated when the first PDU session is established through signaling interaction between network elements or devices, and then the first PDU session and the session for establishing the second PDU session are established at this time.
  • the management network elements can be different.
  • the mobility management network element may determine a second PDU session by acquiring the first service identifier and the first slice identifier, and then determine the second PDU session. Select the first session management network element.
  • the mobility management network element may acquire the first service identifier and the first slice identifier based on the request of the terminal to establish the second PDU session.
  • the first service identifier is used to indicate the first service of the first terminal and can be obtained from the policy control network element;
  • the first slice identifier is used to indicate the slice corresponding to the second PDU session and can be obtained from the unified data management network element. That is to say, the terminal may carry the first service identifier and the first slice identifier when sending the establishment request of the second PDU session to the mobility management network element; it may also be the second PDU session of the mobility management network element based on the terminal
  • the corresponding identifier is obtained from the policy control network element or the unified data management network element.
  • the mobility management network element When the mobility management network element obtains the request for establishing the second PDU session, it can determine that the first service needs to establish a second PDU session by analyzing the first service identifier and the first slice identifier, and select the session management network The element assigns an IP to the second PDU session.
  • the mobility management network element may obtain the first service identifier and the first slice identifier according to the second PDU session request sent by the first terminal.
  • the terminal can learn that the IP allocated when the second PDU session is established needs to be the same as the IP in the first PDU session according to the received second policy, and send this information to the mobility management network element together, and then move the When establishing the second PDU session, the property management network element may select the first session management network element, so that the first session management network element allocates the first IP for the second PDU session.
  • the session management network element establishes a second PDU session, where the second PDU session corresponds to the first service of the first terminal. That is, the first session management network element selected in step 204 establishes a second PDU session for the first service of the first terminal through signaling interaction between network elements or devices.
  • the session management network element allocates the first IP for the second PDU session.
  • the session management network element may allocate the first IP to the second PDU session according to the first policy, may also allocate the first IP to the second PDU session according to the first service identifier and the first slice identifier, or may combine the two,
  • the embodiments of the present application are not limited. That is, the session management network element can determine, according to the received information, that the second PDU session to be established needs to have the same IP as the first PDU session, and then allocate the first IP to the second PDU session.
  • the user plane network element receives indication information from the session management network element, where the indication information includes a first IP, the first IP corresponds to the first PDU session, and the first PDU session corresponds to the first service of the first terminal .
  • the session management network element selects a user plane network element for the second PDU session, and the user plane network element may be the same as or different from the user plane network element that established the first PDU session. It should be understood that when the user plane network element receives the first IP allocated by the session management network element, it may be receiving indication information sent by the session management network element, and the indication information is used to instruct the user plane network element to establish the second PDU session, wherein the indication information includes First IP.
  • the user plane network element may also receive the first policy from the session management network element, so that when subsequently receiving data of the first service, the received data can be processed according to the first policy. Divide processing.
  • the user plane network element establishes a second PDU session according to the indication information, where the second PDU session corresponds to the first IP, and the second PDU session corresponds to the first service of the first terminal.
  • the user plane network element receives the indication information sent by the session management network element, and establishes a second PDU session with the first terminal.
  • the user plane network element needs to use the first IP as the IP corresponding to the second PDU session when establishing the second PDU session. Therefore, the data transmission related to the first service of the first terminal can be switched from the slice corresponding to the first PDU session to the slice corresponding to the second PDU session, that is, the network side device and the terminal side device can switch according to the corresponding
  • the offload strategy is to select an appropriate path for the downstream data flow or upstream data flow of the first service for transmission.
  • the user plane network element needs to establish a first tunnel and a second tunnel to transmit data of different services in order to perform offload processing on data streams of different services.
  • the first tunnel is a tunnel corresponding to the first PDU session
  • the second tunnel is used for data transmission between the first PDU session and the second PDU session. That is to say, on the user plane network element that bears the first PDU session, the interfaces of the first tunnel and the second tunnel are configured at the same time, and then the user plane network element can perform operations on the first tunnel or the second tunnel according to the first policy. data transmission.
  • the user plane network element when it receives a data flow, it can match a suitable flow distribution mode for it according to the first policy, and then select to perform data transmission on the first tunnel or the second tunnel. For example, when the first PDU session borne on the user plane network element receives the data stream of the first service, it can be determined according to the first policy that the data stream needs to be transmitted through the second PDU session, and the data stream needs to be transmitted through the second tunnel. The stream is sent to the second PDU session; if the user plane network element receives the data stream of other services, it directly performs data transmission on the first PDU session through the first tunnel.
  • the policy control network element may generate the first policy according to the received request, and provide a distribution mode for data transmission of the first service, so that the session management network element can allocate the first policy for the second PDU session.
  • the first IP corresponding to the PDU session.
  • the mobility management network element selects the first session management network element for the second PDU session, that is, the session management network element for establishing the first PDU session, so that the session management network element can use the obtained
  • the first IP is allocated to the second PDU session, so that the terminal keeps the IP unchanged during the process of switching slices for the first service, which can prevent the first service from re-establishing the service connection on the new slice and causing the service to be interrupted. , which helps to improve the user's business experience.
  • FIG. 3 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • the session management network element takes SMF as an example
  • the policy control network element takes PCF as an example
  • the mobility management network element takes AMF as an example
  • the user plane network element takes UPF as an example for specific description.
  • the SMF establishes a first PDU session with a terminal.
  • multiple slices are signed on the UDM, one slice corresponds to one DNN, and one DNN may correspond to multiple slices, that is, the DNNs of different slices may be the same or different.
  • the network-side device Before establishing a slice, the network-side device needs to confirm whether there is a slice to be established in the slices subscribed by the UDM, and if so, allow the establishment of the slice.
  • the terminal establishes a PDU session of a default slice, that is, a first PDU session, according to a standard PDU session establishment process defined by 3GPP. Wherein, the first PDU session bears all the services of the terminal.
  • the PCF receives the first request.
  • the service server may call the network capability open interface, and send a first request to the PCF, requesting that the user of the service be switched to the dedicated slice to provide the service. That is to say, in the first PDU session in which all services are carried on the first terminal, a dedicated slice needs to be created for the first service therein.
  • the PCF receives the first request, where the first request is initiated by the service manufacturer and can be sent by the service server by calling the network capability open interface.
  • the first request may include a subscriber identifier (identifier, ID), such as a mobile subscriber international number (Mobile Subscriber International ISDN/PSTN number, MSISDN) and an international mobile subscriber identity (International Mobile Subscriber Identity, IMSI), and may also include Terminal IP, service IP flow, slice ID, etc.
  • ID subscriber identifier
  • IMSI International Mobile Subscriber Identity
  • the PCF generates a first policy and a second policy according to the first request.
  • the first policy and the second policy are policies generated for the purpose of distinguishing the data information of the first service from the data information of other services, and distributing the data information of the first service to the dedicated slice.
  • the PCF can send the first policy to the SMF and to the UPF through the SMF, so as to provide the network side equipment with a way of offloading the downlink data; the second policy can be sent to the terminal through the AMF, and is used to provide the terminal side with the uplink data. Diversion method. It should be understood that both the first policy and the second policy may indicate a distribution manner of the first service of the first terminal on the first PDU session and the second PDU session.
  • the PCF sends the first policy to the SMF that established the first PDU session, so that the SMF can invoke the first policy when subsequently establishing the second PDU session, and perform offload processing on the received downlink data.
  • the first policy may be specifically a downlink classifier (downlink classifier, DLCL) policy, including the terminal IP when the first PDU session is established, the QoS of the service, the service IP flow, the slice identifier, and the subscribed data DNN; the second policy may be specific. It is a user terminal routing policy (UE route selection policy, URSP) policy, including service IP flow, slice identifier, and subscribed data DNN.
  • DLCL downlink classifier
  • URSP user terminal routing policy
  • the first strategy includes packet detection rules (packet detection rules, PDR) and forwarding action rules (forwarding action rules, FAR).
  • PDR packet detection rules
  • FAR forwarding action rules
  • the PCF sends the first policy to the SMF.
  • the PCF sending the first policy to the SMF may be performed simultaneously with step 305, or may be sent before the SMF invokes the first policy, that is, the SMF may obtain the first policy from the PCF before step 308.
  • the SMF that receives the first policy is the first SMF that establishes the first PDU session. Therefore, in step 307, the first SMF selected by the AMF for the second PDU session is the SMF for establishing the first PDU session. Therefore, it can be ensured that the same SMF can obtain both the first IP of the first PDU session and the first policy. That is to say, on the one hand, the first SMF itself is the SMF that establishes the first PDU session, so the IP assigned to the terminal when the first PDU session is established can be obtained.
  • the first PDU session The first IP that the SMF can acquire is allocated to the second PDU session; on the other hand, after the second PDU session is established, the first SMF can, according to the first policy received in the first PDU session, Divide the data information.
  • the PCF sends the second policy to the terminal.
  • the PCF sends the second policy to the terminal through the AMF, and the second policy is used to instruct the terminal to offload the data when sending the uplink data.
  • the second policy is aimed at the first service on the first terminal, that is to say, the second policy corresponds to the first service on the first terminal.
  • the first terminal may select an appropriate slice to transmit data according to the first strategy when sending uplink data.
  • the terminal requests to establish a second PDU session.
  • the terminal after receiving the second policy, the terminal initiates the process of establishing the second PDU session according to the second policy, and specifically, sends a request for establishing the second PDU session to the AMF, where the request carries the first service identifier and the second PDU session. All slices are identified.
  • the first service identifier can be obtained from the PCF, that is, the PCF receives the first request, generates the first policy and the second policy for the first service of the first terminal, and the first policy and the second policy are included in the first policy and the second policy. It carries the first service identifier and is used to indicate the first service of the first terminal.
  • the first slice identifier may be obtained from the UDM, that is, the subscribed slice identifier is stored on the UDM, and before requesting to establish a PDU session, the network side device obtains the subscribed first slice identifier from the UDM.
  • the first slice identifier indicates a slice corresponding to the second PDU session.
  • AMF selects SMF. After receiving the second PDU session establishment request, the AMF selects the first SMF based on the first service identifier and the first slice identifier, where the first SMF is the SMF that establishes the first PDU session.
  • the AMF may acquire the first service identifier and the first slice identifier based on the request of the terminal to establish the second PDU session. That is to say, the terminal may carry the first service identifier and the first slice identifier when sending the establishment request of the second PDU session to the AMF; it may also be the AMF based on the establishment request of the second PDU session of the terminal, from the PCF or UDM Get the corresponding ID.
  • the AMF can determine that the second PDU session is a PDU session established for the first service; and according to the first slice identifier, the AMF can determine that the slices of the second PDU session and the first PDU session are different.
  • the first service has already established the first PDU session, so the AMF selects the SMF for establishing the first PDU session as the SMF for establishing the second PDU session, that is, the AMF selects the first SMF for the second PDU session.
  • the AMF selects the same first SMF as the first PDU session in order to facilitate obtaining the terminal IP and the first policy when establishing the first PDU session from the first SMF.
  • the AMF can also select a second SMF different from the first SMF, and then through the signaling interaction between network elements or devices, the second SMF obtains the terminal IP and the first policy when the first PDU session is established from the first SMF;
  • the first policy sent by the PCF to the first SMF in step 305 may be directly sent to the second SMF through signaling interaction between network elements or devices.
  • the second SMF can simultaneously obtain the terminal IP and the first policy in the first PDU session from the first SMF, or obtain the terminal IP from the first SMF, and obtain the first policy from the PCF, which is implemented in this application.
  • the example does not limit the manner in which the second SMF obtains the terminal IP and the first policy. That is, as long as the second SMF can obtain the terminal IP and the first policy when the first PDU session is established, the AMF can also select the second SMF as the SMF for establishing the second PDU session.
  • only the solution in which the SMF for establishing the first PDU session and the SMF for establishing the second PDU session is the same SMF is used as an example for description.
  • the SMF allocates a terminal IP for the second PDU session.
  • the UPF allocates the IP for the PDU session
  • the other is that the IP is allocated through the SMF.
  • the SMF allocates an IP to the second PDU session.
  • the SMF that allocates the IP can be the first SMF that is connected when the first PDU session is established.
  • the first SMF records the terminal IP in the first PDU session, that is, the allocated IP is the first SMF. Terminal IP in a PDU session.
  • the SMF that assigns the IP may also be the second SMF that obtains the IP of the terminal in the first PDU session. That is to say, the SMF that can acquire the terminal IP in the first PDU session and assign the IP to the second PDU session can be used as the SMF that assigns the IP in this step.
  • the SMF can allocate the first IP for the second PDU session according to the first policy, or allocate the first IP for the second PDU session according to the first service identifier and the first slice Two PDU sessions are assigned the first IP.
  • the SMF may randomly select a UPF from the available UPFs to establish the second PDU session, or may select the same UPF as the UPF for establishing the first PDU session as the UPF for establishing the second PDU session.
  • the UPF selected by the SMF for the second PDU session is different from the corresponding UPF when the first PDU session is established, in the process of data transmission, data needs to be sent and received through forwarding between devices. Therefore, preferably, the first UPF is the same as the second UPF.
  • the SMF After selecting the UPF for the second PDU session, the SMF sends the first policy to the UPF, so that the UPF can perform offload processing on the received data according to the first policy.
  • the SMF establishes a second PDU session with the terminal.
  • the UPF can offload the downlink data according to the first policy, so that the service data can be The transmission is performed on the slice corresponding to the second PDU session, and since the IP of the terminal that established the second PDU session is the same as the IP of the terminal that established the first PDU session, the terminal switches the first service to the slice corresponding to the second PDU session at the same time. It can ensure that the service of the user is not interrupted.
  • the SMF returns a second PDU session establishment success response to the AMF.
  • the AMF sends a second PDU session establishment success response to the terminal, where the terminal IP carried in the response message is the same as the terminal IP in the first PDU session.
  • the PCF can generate the first policy and the second policy according to the received request, and provide a data transmission offload mode for the network side device and the terminal side device respectively, and at the same time, the AMF selects the first policy for the second PDU session.
  • An SMF that is, the SMF that established the first PDU session, so that the SMF can allocate the first IP corresponding to the first PDU session to the second PDU session, so that the terminal keeps the IP unchanged during the process of switching slices for the first service, and can This avoids service interruption caused by the first service re-establishing a service connection on a new slice using a new IP, which helps to improve the user's service experience.
  • FIG. 3 only shows the establishment process of the second PDU session.
  • it is also necessary to establish a tunnel for sending data between the first PDU session and the second PDU. Therefore, in conjunction with the following figure 4. Specifically describe the process of establishing the tunnel between the first PDU session and the second PDU.
  • FIG. 4 is a schematic flowchart of a method for establishing a channel provided by an embodiment of the present application.
  • the UPFs where the first PDU session and the second PDU session are located may be the same or different.
  • the UPF where the two sessions are located is the same as an example for specific description.
  • information synchronization can be achieved by forwarding information between devices, which will not be repeated here.
  • the UPF establishes the first tunnel and the second tunnel by exchanging information with the SMF.
  • the first tunnel is a tunnel corresponding to the first PDU session
  • the second tunnel is used for data transmission between the first PDU session and the second PDU session.
  • the first tunnel is an N3 tunnel as an example
  • the second tunnel is an N9 tunnel as an example.
  • Establish an N9 tunnel of the first PDU session Specifically include the following steps:
  • the SMF sends an N4 session modification request message to the UPF.
  • the UPF returns an N4 session modification response message to the SMF.
  • the SMF and the UPF interact through signaling to establish the first tunnel, that is, the N9 tunnel corresponding to the first PDU session.
  • the UPF returns the N9 tunnel information of the first PDU session to the SMF, such as tunnel IP, tunnel endpoint identifier (Tunnel Endpoint Identifier, TEID), and the like.
  • Establish a second PDU session Specifically include the following steps:
  • the SMF sends an N4 session establishment request message to the UPF.
  • the UPF returns an N4 session establishment response message to the SMF.
  • an N4 session is established between the SMF and the UPF, and the N4 session is used to manage the second PDU session.
  • the SMF sends the N9 tunnel information of the first PDU session to the UPF, the UPF establishes an uplink N9 tunnel from the second PDU session to the first PDU session, and sends the N9 tunnel information of the second PDU session to the SMF.
  • the SMF and the radio access network complete the establishment of the N3 tunnel of the second PDU session. That is, on the basis of step 402, the SMF and the wireless access network complete the establishment of the N3 tunnel, so that the wireless access network can obtain data information through the N3 tunnel.
  • the second PDU session is connected to the N3 tunnel of the wireless access network. Specifically include the following steps:
  • the SMF sends an N4 session modification request message to the UPF.
  • the UPF returns an N4 session modification response message to the SMF.
  • the SMF connects the second PDU session to the N3 tunnel, so that data transmission can be performed between the radio access network and the second PDU session through the N3 tunnel.
  • the first PDU session is connected to the N9 tunnel of the second PDU session. Specifically include the following steps:
  • the SMF sends an N4 session modification request message to the UPF.
  • the UPF returns an N4 session modification response message to the SMF.
  • the first PDU session is connected to the N9 tunnel of the second PDU session, and the first policy is delivered for the first PDU session.
  • the SMF sends the N9 tunnel information of the second PDU session to the UPF, and the UPF establishes the N9 tunnel from the first PDU session to the second PDU session.
  • the SMF sends the FAR and PDR policies corresponding to the first policy to the UPF.
  • FIG. 5 is a schematic diagram of a data distribution manner provided by an embodiment of the present application.
  • the terminal Since the terminal has the same IP in the established first PDU session and the second PDU session, when sending uplink data, it can select a slice from the first slice and the second slice, and send it through the PDU session corresponding to the slice. data.
  • the first slice is the slice that provides services through the first PDU session
  • the second slice is the slice that provides services through the second PDU session.
  • the second PDU session is established according to the request of the service provider, and the second policy and the first policy are also generated according to the request. Therefore, after receiving the second policy, the terminal selects to send the uplink data of the first service through the second PDU session according to the instruction of the second policy.
  • the terminal selects to send uplink data through the first PDU session according to the instruction of the second policy.
  • the terminal When the terminal sends uplink data through the second PDU session, it first sends the uplink data to the second UPF through the N3 tunnel 504 , and the second UPF directly forwards the uplink data to the first UPF through the N9 tunnel 503 .
  • the first UPF recognizes that the upstream data is received through the N9 tunnel 502, and forwards the upstream data, for example, to the destination of the upstream data.
  • the uplink data distribution method is mainly that the terminal selects a PDU session to send data according to the second policy, and the subsequent forwarding of the uplink data only needs to be forwarded by the first UPF and the second UPF through the tunnel.
  • the downlink data is first sent to the first UPF through the first PDU session.
  • the first PDU session matches the downlink data flow according to the first policy, specifically, matches the downlink data flow according to the PDR in the first policy, and determines whether the downlink data flow needs to be processed according to the forwarding rule in the first policy. Forward.
  • the downlink data stream matches the PDR, for example, the downlink data stream is the downlink data stream of the first service, then according to the FAR in the first policy, the downlink data stream passes the N9 tunnel 502 on the first UPF to the downlink data stream It is forwarded to the second PDU session; if the downstream data flow is a data flow of a common service, it is sent to the terminal through the N3 tunnel 501 . After the downstream data flow of the first service is forwarded to the second PDU session through the N9 tunnel 502 on the first UPF, the first UPF continues to forward the downstream data flow to the terminal through its N3 tunnel 504 .
  • the downlink data distribution method is mainly to use the PDR and FAR in the first policy to match the downlink data stream received by the first PDU session on the first UPF, and to match the downlink data stream on the specified tunnel according to the forwarding rules. Different downstream data streams are forwarded.
  • the first UPF and the second UPF shown in FIG. 5 may be the same UPF, or may be different UPFs.
  • the SMF allocates the IP of the terminal in the first PDU session to the terminal in the second PDU session and establishes the second PDU session for the second UPF, it only establishes a session similar to an intermediate UPF (I-UPF), and refreshes the The first policy for the first PDU session.
  • I-UPF intermediate UPF
  • the UPF can provide data transmission channels for different PDU sessions and corresponding slices.
  • the network-side device and the terminal-side device may perform offload processing on different data flows according to the first policy and the second policy.
  • the terminal switches slices for the first service, the terminal keeps the IP unchanged, which can avoid the service interruption caused by the first service re-establishing the service connection on the new slice using the new IP, which helps to improve the user's service experience .
  • FIG. 6 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 600 may be the aforementioned session management network element, and the communication apparatus 600 includes an acquisition unit 601 and a processing unit 602.
  • a transceiver unit 603 may also be included.
  • the transceiver unit can also be divided into a receiving unit and a sending unit, which respectively perform operations related to receiving and sending, which are not limited here.
  • the obtaining unit 601 is configured to obtain the first IP corresponding to the first protocol data unit PDU session, the first PDU session corresponds to the first service of the first terminal; the processing unit 602 is configured to establish a second PDU session, The second PDU session corresponds to the first service of the first terminal; the processing unit 602 is further configured to assign the first IP to the second PDU session.
  • the apparatus may further include a transceiving unit 603, and the transceiving unit 603 is configured to receive a first policy, where the first policy is used to instruct the first service of the first terminal to communicate with the first PDU session in the first PDU session.
  • the acquiring unit 601 is further configured to acquire a first service identifier, where the first service identifier is used to indicate the first service of the first terminal; the acquiring unit 601 is further configured to acquire a first slice identifier, The first slice identifier is used to indicate a slice corresponding to the second PDU session; wherein, the processing unit 602 is further configured to allocate the first slice to the second PDU session according to the first service identifier and the first slice identifier IP.
  • the obtaining unit 601 is further configured to obtain the first service identifier from the policy control network element.
  • the obtaining unit 601 is further configured to obtain the first slice identifier from the unified data management network element.
  • FIG. 7 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 700 may be the aforementioned policy control network element, and the communication apparatus 700 includes a processing unit 701 and a transceiver unit 702 .
  • the transceiver unit can also be divided into a receiving unit and a sending unit, which respectively perform operations related to receiving and sending, which are not limited here.
  • the processing unit 701 is configured to generate a first policy, where the first policy is used to indicate a distribution mode of the first service of the first terminal on the first PDU session and the second PDU session; the transceiver unit 702 is configured to send the session The management network element sends the first policy, and the session management network element is configured to allocate a first IP to the second PDU session according to the first policy.
  • the transceiving unit 702 is further configured to receive a first request, where the first request is used to request to establish the second PDU session for the first service of the first terminal; wherein the processing unit 701 is configured to request according to the The first request generates the first policy.
  • the processing unit 701 is configured to generate the first policy and the second policy according to the first request, where the second policy is used to indicate that the first service of the first terminal is in the first PDU session The offloading mode on the session with the second PDU; the transceiver unit 702 is further configured to send the second policy to the first terminal, so that the first terminal can select the second PDU session for the first service according to the second policy .
  • FIG. 8 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 800 may be the aforementioned mobility management network element, and the communication apparatus 800 includes a determination unit 801 .
  • an obtaining unit 802 may also be included.
  • the determining unit 801 is configured to determine a first session management network element, where the first session management network element is configured to allocate a first IP corresponding to the first PDU session for the second PDU session, and the first session management network element is establishing a session management network element of the first PDU session, where the first PDU session and the second PDU session correspond to the first service of the first terminal.
  • the apparatus may further include an acquiring unit 802, where the acquiring unit 802 is configured to acquire a first service identifier and a first slice identifier, where the first service identifier is used to indicate the first service of the first terminal , the first slice identifier is used to indicate a slice corresponding to the second PDU session; wherein, the determining unit 801 is configured to determine the first session management network element according to the first service identifier and the first slice identifier.
  • the obtaining unit 802 is configured to receive the second PDU session establishment request from the first terminal, where the second PDU session establishment request includes the first service identifier and the first slice identifier.
  • FIG. 9 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • the communication apparatus 900 may be the aforementioned user plane network element, and the communication apparatus 900 includes a transceiver unit 901 and a processing unit 902 .
  • the transceiver unit can also be divided into a receiving unit and a sending unit, which respectively perform operations related to receiving and sending, which are not limited here.
  • the transceiver unit 901 is configured to receive a first IP allocated by the session management network element, where the first IP corresponds to the first PDU session; the processing unit 902 is configured to establish a second PDU session according to the first IP, and the first IP corresponds to the first PDU session.
  • a PDU session and the second PDU session correspond to the first service of the first terminal.
  • the transceiver unit 901 is further configured to receive a first policy from the session management network element, where the first policy is used to indicate that the first service of the first terminal is in the first PDU session and the second PDU The offloading mode on the session; the processing unit 902 is further configured to establish a first tunnel and a second tunnel, the first tunnel is a tunnel corresponding to the first PDU session, and the second tunnel is used to perform the first PDU session and the second tunnel. Data transmission between PDU sessions; the transceiver unit 901 is further configured to perform data transmission on the first tunnel or the second tunnel according to the first policy.
  • the apparatuses 600 to 900 of the above solutions have the function of implementing the corresponding steps performed by the session management network element, the policy control network element, the mobility management network element or the user plane network element in the above method.
  • the functions may be implemented by hardware, or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the sending unit may be replaced by a transmitter, and the receiving unit may be replaced by a receiver; other units, such as a determination unit, may be replaced by a processor, respectively performing the transceiver operations and related processing operations in each method embodiment.
  • the apparatuses in FIGS. 6 to 9 may also be chips or chip systems, and correspondingly, the receiving unit and the sending unit may be transceiver circuits of the chip, which are not limited herein.
  • FIG. 10 is a schematic block diagram of another communication apparatus provided by an embodiment of the present application.
  • the apparatus 1000 includes a processor 1001 , a transceiver 1002 and a memory 1003 .
  • the processor 1001, the transceiver 1002 and the memory 1003 communicate with each other through an internal connection path, the memory 1003 is used to store instructions, and the processor 1001 is used to execute the instructions stored in the memory 1003 to control the transceiver 1002 to send signals and / or receive signals.
  • the apparatus 1000 may specifically be a session management network element, a policy control network element, a mobility management network element or a user plane network element in the foregoing method embodiments, and may be configured to execute the session management network element, Each step and/or process corresponding to the policy control network element, the mobility management network element or the user plane network element.
  • the memory 1003 may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information.
  • the processor 1001 may be configured to execute the instructions stored in the memory, and when the processor 1001 executes the instructions stored in the memory, the processor 1001 is configured to execute the steps and/or steps of the above-mentioned method embodiments corresponding to each network element. or process.
  • the transceiver 1002 described above may include a transmitter and a receiver.
  • the transceiver may further include antennas, and the number of the antennas may be one or more.
  • the memory can be a separate device or integrated in the processor.
  • Each of the above-mentioned devices or some of the devices can be implemented by being integrated into a chip, such as a baseband chip.
  • the transceiver in FIG. 10 may also be a communication interface, which is not limited herein.
  • the network elements involved in the embodiments of the present application may be physical entity devices or virtual functional network elements, which are not limited herein.
  • the names of the request message, the response message and other various messages are used.
  • these messages are merely examples to illustrate the content to be carried or the functions to be implemented, and the specific names of the messages do not limit the application, for example, it can also be a first message, a second message, a third message, and so on.
  • These messages can be specific messages or some fields in the message. These messages can also represent various serviced operations.
  • the processor of the above device may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP) ), application specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software units in the processor.
  • the software unit may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor executes the instructions in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of 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 components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and 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 execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé de communication et un appareil de communication permettant de garantir qu'un service ne sera pas interrompu pendant un processus de commutation de tranche d'un terminal. Le procédé comprend les étapes suivantes : un élément réseau de gestion de session acquiert un premier protocole Internet (IP) correspondant à une première session d'unité de données de protocole (PDU), la première session PDU correspondant à un premier service d'un premier terminal ; l'élément réseau de gestion de session établit une seconde session PDU, la seconde session PDU correspondant au premier service du premier terminal ; et l'élément réseau de gestion de session attribue le premier IP à la seconde session PDU. Au moyen du procédé, un IP reste inchangé pendant un processus de commutation de tranche d'un terminal pour un premier service de façon à éviter l'interruption de service due au rétablissement par le premier service d'une connexion de service sur une nouvelle tranche à l'aide d'un nouvel IP, ce qui contribue à améliorer l'expérience de service d'un utilisateur.
PCT/CN2021/079363 2021-03-05 2021-03-05 Procédé de communication et appareil de communication WO2022183497A1 (fr)

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PCT/CN2021/079363 WO2022183497A1 (fr) 2021-03-05 2021-03-05 Procédé de communication et appareil de communication

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Citations (4)

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CN107592331A (zh) * 2016-07-08 2018-01-16 中兴通讯股份有限公司 会话连续的实现方法、装置及系统
CN109842643A (zh) * 2017-11-27 2019-06-04 华为技术有限公司 一种会话处理的方法、装置及系统
CN110278619A (zh) * 2018-03-13 2019-09-24 华为技术有限公司 一种pdu会话建立的方法和装置
US20200053803A1 (en) * 2016-10-07 2020-02-13 Lg Electronics Inc. Method for selecting session and service continuity mode in wireless communication system and device therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107592331A (zh) * 2016-07-08 2018-01-16 中兴通讯股份有限公司 会话连续的实现方法、装置及系统
US20200053803A1 (en) * 2016-10-07 2020-02-13 Lg Electronics Inc. Method for selecting session and service continuity mode in wireless communication system and device therefor
CN109842643A (zh) * 2017-11-27 2019-06-04 华为技术有限公司 一种会话处理的方法、装置及系统
CN110278619A (zh) * 2018-03-13 2019-09-24 华为技术有限公司 一种pdu会话建立的方法和装置

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