WO2023185435A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2023185435A1
WO2023185435A1 PCT/CN2023/081070 CN2023081070W WO2023185435A1 WO 2023185435 A1 WO2023185435 A1 WO 2023185435A1 CN 2023081070 W CN2023081070 W CN 2023081070W WO 2023185435 A1 WO2023185435 A1 WO 2023185435A1
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WO
WIPO (PCT)
Prior art keywords
service
terminal device
network element
access technology
indication information
Prior art date
Application number
PCT/CN2023/081070
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English (en)
Chinese (zh)
Inventor
李永翠
吴义壮
倪慧
李岩
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023185435A1 publication Critical patent/WO2023185435A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

  • the embodiments of the present application relate to the field of wireless communications, and in particular, to a communication method and device.
  • user plane devices basically follow a tree topology deployment.
  • Uplink user packets pass through the base station and backhaul network, and finally access the data network through the centrally deployed anchor gateway.
  • these anchor gateways are generally deployed at higher locations in the network, such as regional central computer rooms.
  • the above deployment method is relatively simple and facilitates operators to conduct centralized business management and control and packet processing at the anchor gateway.
  • EC edge computing
  • the EC service may be interrupted or the path of the backhaul network may be detoured.
  • This application provides a communication method and device to solve the problem of EC service interruption or detour of the backhaul network path.
  • the present application provides a communication method.
  • the method includes: a session management network element receiving an identifier of a service accessed by a terminal device, and when the service is an edge computing service, the session management network element sends a request to the session management network element.
  • the terminal device sends instruction information, and the instruction information indicates that the terminal device is not allowed to switch the access technology corresponding to the service away from 3GPP access.
  • the session management network element when the session management network element determines that the terminal device accesses the edge computing service, it can instruct the terminal device not to allow the access technology corresponding to the service to be switched away from 3GPP access, thereby enabling the terminal device to select an edge application that is closer to the distance.
  • Server access to edge computing services can ensure the continuity of edge computing services as well as low service latency and high reliability.
  • the method further includes: the session management network element determines that the service is the edge computing service according to the identifier of the service.
  • the session management network element when the service is an edge computing service and the terminal device is located in a service area of the service, the session management network element sends indication information to the terminal device.
  • the session management network element when the terminal device moves outside the service area of the service, the session management network element sends first indication information to the terminal device, and the first indication information Instruct the terminal device to allow the access technology corresponding to the service to be switched away from 3GPP access.
  • the first indication information may be updated indication information.
  • the bits corresponding to the first indication information and the bits corresponding to the indication information are the same bits; or the first indication information and the indication information respectively belong to different cells.
  • the session management network element may determine whether the terminal device is located in the service area of the service based on the location information of the terminal device and the service area of the service, that is, determine whether the terminal device can access the service.
  • the session management network element sends instruction information to the terminal device, so that the terminal device does not switch the access technology corresponding to the service away from 3GPP access, thus ensuring the continuity of edge computing services. performance, low latency and high reliability of services.
  • the session management network element sends the first instruction information to the terminal device, which can enable the terminal device to resume accessing the service by selecting the access technology according to the user's preference.
  • the session management network element determines area information, the area indicated by the area information is part or all of the service area of the service, and the session management network element sends the information to the terminal device. Describe regional information.
  • the area information can be used to determine whether it is located in the area indicated by the area information, that is, to determine whether the service can be accessed.
  • the indication information is area information. Therefore, the area information can be used to indicate that the access technology corresponding to the service is not allowed to switch away from 3GPP access in the area indicated by the area information.
  • the indication information and the area information are two different information elements. According to the indication information and the area information, it can be determined that the access technology corresponding to the service is not allowed to be switched away from the 3GPP access in the area indicated by the area information. Therefore, the session management network element can realize the effective range or applicable range of the indication information by sending the area information to the terminal device.
  • the session management network element can determine the area information based on the mobility mode information of the terminal device and the service area of the service, where the mobility mode information of the terminal device indicates the mobility area or range of the terminal device, the mobility range of the terminal device, and the mobility range of the terminal device. At least one of the moving speed or the moving direction of the terminal device. Therefore, the session management network element can provide area information to the terminal device according to the actual movement of the terminal device, thereby reducing signaling overhead.
  • the area information includes at least one of a tracking area identifier, a cell identifier, or a data network access identifier.
  • the session management network element before sending the instruction information to the terminal device, receives configuration information from the application function network element, and the configuration information indicates that the network side is allowed to control the service corresponding to the service. access technology.
  • the network side can be understood as a non-terminal device side, which allows the network side to control the access technology corresponding to the service. It can be understood that the network side can participate in controlling the access technology corresponding to the service.
  • the session management network element obtains the configuration information
  • the session management network element controls the access technology corresponding to the service according to the configuration information. That is, the session management network element can send instruction information to the terminal device according to the configuration information.
  • the session management network element sends the identifier of the service to the terminal device to determine the corresponding relationship between the identifier of the service and the indication information, that is, to determine that the indication information indicates that the connection from 3GPP is not allowed. Switch in and out of the service.
  • the session management network element sends a session modification command to the terminal device, where the session modification command includes the indication information.
  • the session management network element obtains edge computing service deployment information, and the session management network element determines that the service is an edge computing service based on the edge computing service deployment information.
  • this application provides a communication method, which method includes: a terminal device receiving indication information, the indication information indicating that the terminal device is not allowed to switch the access technology corresponding to the service away from 3GPP access.
  • the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, the terminal device does not access the access technology corresponding to the service from 3GPP according to the instruction information. Switch away.
  • the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, if the terminal device receives the indication information, the access technology corresponding to the service will not be connected from 3GPP according to the indication information.
  • the terminal device By switching in and out, it is possible to select a closer edge application server to access edge computing services, which can ensure the continuity of edge computing services as well as low service latency and high reliability.
  • the user preference of the terminal device indicates that the priority of the non-3GPP access technology is higher than the priority of the 3GPP access technology. That is to say, when the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, if the terminal device receives instruction information for the service, the user preference will not be used as the basis for initiating access technology switching. , the terminal device determines whether to initiate access technology switching based on the instruction information. Therefore, compared with the existing technology, the terminal device only determines the access technology corresponding to the service based on user preferences, which may cause the edge computing service to be interrupted or the path of the backhaul network to be detoured. problems, the above problems can be avoided by using the method provided by this application.
  • the terminal device receives the instruction information from the session management network element.
  • the terminal device receives a session modification command from the session management network element, and the session modification command includes the instruction information;
  • the terminal device receives the instruction information from the policy control network element.
  • the terminal device receives the policy of the terminal device from the policy control network element, and the policy of the terminal device includes the instruction information.
  • the terminal device receives area information, and the area indicated by the area information is part or all of the service area of the service, then the terminal device receives the area information according to the indication information and the area information.
  • the access technology corresponding to the service is not switched away from 3GPP access.
  • the indication information is area information. Therefore, the terminal device can determine according to the area information that the access technology corresponding to the service is not allowed to switch away from 3GPP access in the area indicated by the area information.
  • the indication information and the area information are two different information elements, and the terminal device can determine based on the indication information and the area information that the access technology corresponding to the service is not allowed to be switched away from 3GPP access in the area indicated by the area information.
  • the modulation and demodulation layer of the terminal device receives the indication information and saves the indication information.
  • the modulation and demodulation layer of the terminal device receives a request from the operating system layer of the terminal device. message, the request message is used to determine whether to initiate switching of the access technology corresponding to the service from the 3GPP access, and the modulation and demodulation layer of the terminal device determines not to switch the access technology corresponding to the service according to the indication information.
  • the access technology is switched away from the 3GPP access, and the modem layer of the terminal device sends a response message to the operating system layer of the terminal device.
  • the response message indicates that the access technology corresponding to the service is not to be switched. Handover away from the 3GPP access.
  • the modulation and demodulation layer saves the instruction information, judges the request message received from the operating system layer based on the instruction information, and feeds the judgment result back to the operating system layer through the response message, where the modulation and demodulation layer
  • the layer adjustment determines whether to initiate handover of the access technology corresponding to the service from the 3GPP access.
  • the modulation and demodulation layer of the terminal device receives the indication information
  • the modulation and demodulation layer of the terminal device sends a request to the operating system of the terminal device.
  • the operating system layer of the terminal device sends the indication information
  • the operating system layer of the terminal device stores the indication information.
  • the terminal device does not switch the access technology corresponding to the service from the 3GPP access according to the indication information
  • the operating system layer of the terminal device determines not to switch the access technology corresponding to the service to the 3GPP access according to the indication information.
  • the access technology leaves from the 3GPP access handover.
  • the operating system layer saves the indication information, and determines whether to initiate handover of the access technology corresponding to the service from the 3GPP access based on the indication information.
  • the present application provides a communication method, which method includes: a policy control network element determines a policy of a terminal device; the policy of the terminal device includes indication information, and the policy control network element sends the policy to the terminal device.
  • the indication information indicates that the terminal device is not allowed to switch the access technology of the service away from 3GPP access.
  • the policy when the policy control network element determines the policy of the terminal device, the policy may include instruction information corresponding to the edge computing service.
  • the instruction information indicates that the terminal device is not allowed to access the access technology corresponding to the edge computing service from 3GPP. Switching away enables the terminal device to select a nearby edge application server to access the edge computing service, which can ensure the continuity of the edge computing service and the low latency and high reliability of the service.
  • the policy further includes area information, and the area indicated by the area information is part or all of the service area of the service.
  • the area information can be used to determine whether it is located in the area indicated by the area information, that is, to determine whether the service can be accessed.
  • the indication information is area information. Therefore, the area information can be used to indicate that the access technology corresponding to the service is not allowed to switch away from 3GPP access in the area indicated by the area information.
  • the indication information and the area information are two different information elements. According to the indication information and the area information, it can be determined that the access technology corresponding to the service is not allowed to be switched away from the 3GPP access in the area indicated by the area information. Therefore, the policy control network element can realize the effective range or applicable range of the indication information by sending area information to the terminal device.
  • the policy control network element determines the area information according to the mobility mode information of the terminal device, wherein the mobility mode information of the terminal device indicates the mobility area or mobility range of the terminal device. , at least one of the moving speed of the terminal device or the moving direction of the terminal device. Therefore, the policy control network element can provide area information to the terminal device according to the actual movement of the terminal device, thereby reducing signaling overhead.
  • the area information includes at least one of a tracking area identifier, a cell identifier, or a data network access identifier.
  • the policy further includes an access technology corresponding to the service, where the access technology corresponding to the service is 3GPP access. Therefore, the terminal device can preferentially choose to access the service through the 3GPP access technology.
  • the policy control network element receives configuration information from the application function network element, and the configuration information indicates that the network side is allowed to control the access technology corresponding to the service.
  • the network side can be understood as a non-terminal device side, which allows the network side to control the access technology corresponding to the service. It can be understood that the network side can participate in controlling the access technology corresponding to the service.
  • the policy control network element obtains the configuration information
  • the policy control network element controls the access technology corresponding to the service according to the configuration information. That is, the policy control network element can send instruction information to the terminal device according to the configuration information.
  • the policy control network element when the terminal device is located in the service area of the service, the policy control network element sends the policy to the terminal device.
  • the policy control network element after the policy control network element sends the policy to the terminal device, it also includes include:
  • the policy control network element sends an updated policy to the terminal device, where the updated policy does not include the indication information, or
  • the updated policy includes first indication information, and the first indication information instructs the terminal device to allow the access technology of the service to be switched away from the 3GPP access.
  • the first indication information may be updated indication information.
  • the bits corresponding to the first indication information and the bits corresponding to the indication information are the same bits; or the first indication information and the indication information respectively belong to different cells.
  • the policy control network element can determine the policy of the terminal device based on whether the terminal device is located in the service area of the service. When the terminal device moves, it can also promptly update the policy of the terminal based on the location information after the move.
  • the updated policy includes an updated access technology corresponding to the service, and the updated access technology corresponding to the service is the 3GPP access or the non-3GPP access. enter.
  • the policy control network element obtains edge computing service deployment information, and the policy control network element determines that the service is an edge computing service based on the edge computing service deployment information.
  • the policy control network element when the policy control network element obtains the edge computing service deployment information, the policy control network element receives the edge computing service deployment information from the application function network element.
  • the present application provides a communication device, which is a session management network element or a chip in the session management network element; the device includes: one or more functional units for executing the session management network element execution. method.
  • the device includes: a transceiver unit calling the processing unit for execution; receiving an identifier of a service accessed by a terminal device; and when the service is an edge computing service, sending indication information to the terminal device, the indication information Instruct the terminal device not to allow the access technology corresponding to the service to be switched away from the 3rd Generation Partnership Project 3GPP access.
  • the transceiver unit is configured to send indication information to the terminal device when the service is an edge computing service and the terminal device is located in a service area of the service.
  • the transceiver unit is configured to send first indication information to the terminal device when the terminal device moves outside the service area of the service.
  • the first indication The information indicates that the terminal device allows the access technology corresponding to the service to be switched away from 3GPP access.
  • the processing unit is used to determine area information, and the area indicated by the area information is part or all of the service area of the service; and the transceiver unit is used to send a message to the terminal device. Send the zone information.
  • the transceiver unit is configured to receive configuration information from an application function network element before sending indication information to the terminal device.
  • the configuration information indicates that the network side is allowed to control the service correspondence. access technology.
  • the transceiver unit is configured to send an identifier of the service to the terminal device.
  • the present application provides a communication device, which is a terminal device or a chip within the terminal device.
  • the device includes: one or more functional units for executing a method executed by a session management network element.
  • the device includes: a transceiver unit and a processing unit; the transceiver unit is used to receive indication information, the indication information indicates that the terminal device is not allowed to switch the access technology corresponding to the service away from 3GPP access;
  • the processing unit is configured to not change the access technology corresponding to the service from 3GPP according to the instruction information when the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area. Switch on and off open.
  • the user preference of the terminal device indicates that the priority of the non-3GPP access technology is higher than the priority of the 3GPP access technology.
  • the transceiver unit is configured to receive the indication information from the session management network element; or, receive the indication information from the policy control network element.
  • the transceiver unit is configured to receive area information, and the area indicated by the area information is part or all of the service area of the service; and the processing unit is configured to perform the processing according to the instruction.
  • the processing unit is configured to perform the processing according to the instruction.
  • the modulation and demodulation layer of the terminal device when the terminal device receives the indication information, the modulation and demodulation layer of the terminal device receives the indication information; when the terminal device does not convert the service corresponding to the service according to the indication information.
  • the modulation and demodulation layer of the terminal device receives a request message from the operating system layer of the terminal device. The request message is used to determine whether to initiate the transfer of the service corresponding to the service.
  • the access technology is switched away from the 3GPP access; the modulation and demodulation layer of the terminal device determines not to switch the access technology corresponding to the service away from the 3GPP access according to the instruction information; the terminal device The modulation and demodulation layer sends a response message to the operating system layer of the terminal device, where the response message indicates not to switch the access technology corresponding to the service away from the 3GPP access.
  • the modulation and demodulation layer of the terminal device receives the indication information
  • the modulation and demodulation layer of the terminal device sends a request to the operating system of the terminal device.
  • the layer sends the indication information; when the terminal device does not switch the access technology corresponding to the service from the 3GPP access according to the indication information, the operating system layer of the terminal device uses the indication information to It is determined not to switch the access technology corresponding to the service away from the 3GPP access.
  • the present application provides a communication device, which is a policy control network element or a chip within a policy control network element.
  • the device includes: a transceiver unit and a processing unit; the processing unit is used to determine the Policy; the policy of the terminal device includes instruction information, wherein the instruction information indicates that the terminal device is not allowed to switch the access technology of the service away from 3GPP access, and the service is an edge computing service; the transceiver unit , used to send the policy to the terminal device.
  • the policy further includes area information, and the area indicated by the area information is part or all of the service area of the service.
  • the processing unit is configured to determine the area information according to the movement mode information of the terminal device; wherein the movement mode information of the terminal device indicates the movement area or movement of the terminal device. At least one of the range, the moving speed of the terminal device, or the moving direction of the terminal device.
  • the policy further includes an access technology corresponding to the service, where the access technology corresponding to the service is 3GPP access.
  • the transceiver unit is configured to receive configuration information from the application function network element before determining the policy of the terminal device, and the configuration information indicates that the network side is allowed to control access corresponding to the service. technology.
  • the transceiver unit is configured to send the policy to the terminal device when the terminal device is located in a service area of the service.
  • the transceiver unit is configured to: after the policy control network element sends the policy to the terminal device, when the terminal device moves outside the coverage area of the service, Send to the terminal device The updated policy, wherein the updated policy does not include the indication information, or the updated policy includes first indication information, the first indication information instructs the terminal device to allow the service to be The access technology leaves from the 3GPP access handover.
  • the updated policy includes an updated access technology corresponding to the service, and the updated access technology corresponding to the service is the 3GPP access or the non-3GPP access. enter.
  • this application also provides a device.
  • the device can perform the above method design.
  • the device may be a chip or circuit capable of performing the functions corresponding to the above methods, or a device including the chip or circuit.
  • the device includes: a memory for storing computer executable program code; and a processor, the processor is coupled to the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the device or the device installed with the device executes the method in any of the above possible designs.
  • the device may further include a communication interface, which may be a transceiver, or, if the device is a chip or a circuit, the communication interface may be an input/output interface of the chip, such as an input/output pin, etc.
  • a communication interface which may be a transceiver, or, if the device is a chip or a circuit, the communication interface may be an input/output interface of the chip, such as an input/output pin, etc.
  • the device includes corresponding functional units, respectively used to implement the steps in the above method.
  • Functions can be implemented by hardware, or by hardware executing corresponding software.
  • Hardware or software includes one or more units corresponding to the above functions.
  • the present application provides a computer-readable storage medium that stores a computer program.
  • the computer program When the computer program is run on a device, the method in any of the above possible designs is executed.
  • the present application provides a computer program product.
  • the computer program product includes a computer program.
  • the computer program is run on a device, the method in any of the above possible designs is executed.
  • Figure 1 is a schematic diagram of the architecture of the mobile communication system applied in this application.
  • FIG. 2 is a schematic structural diagram of the terminal equipment used in this application.
  • Figure 3 is a schematic diagram of the scenario of deploying the MEC server applied in this application.
  • Figure 4 is a schematic diagram of the access technology corresponding to the EC service applied in this application switching from 3GPP access to non-3GPP access;
  • Figure 5 is an overview flow chart of a communication method in this application.
  • Figure 6 is a flow chart for the modulation and demodulation layer in this application to determine whether to initiate switching of the access technology corresponding to the service from 3GPP access;
  • Figure 7 is a flow chart for the operating system layer in this application to determine whether to initiate switching of the access technology corresponding to the service from 3GPP access;
  • FIG 8 is an overview flow chart of another communication method in this application.
  • Figure 9 is a schematic structural diagram of a communication device in this application.
  • Figure 10 is a schematic structural diagram of another communication device in this application.
  • At least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • Figure 1 shows a schematic diagram of the 5G network architecture. The following is a brief description of the functions of some of the equipment involved in Figure 1.
  • the terminal device is the entrance for mobile users to interact with the network. It can provide basic computing capabilities and storage capabilities, display business windows to users, and receive user operation inputs.
  • Next-generation terminal equipment NextGen UE
  • NextGen UE can use new air interface technology to establish signal connections and data connections with the RAN, thereby transmitting control signals and business data to the mobile network.
  • Terminal devices can include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of terminals, mobile stations (MS), terminals (terminal), soft terminal, etc., such as water meters, electricity meters, sensors, etc.
  • Access network (AN) equipment or radio access network (RAN) equipment Deployed close to terminal equipment, it provides network access functions for authorized users in a specific area, and can provide services based on the user's level. The requirements determine transmission tunnels of different qualities to transmit user data.
  • RAN can manage its own resources, utilize them rationally, provide access services to terminal devices on demand, and is responsible for forwarding control signals and user data between terminal devices and the core network.
  • Data network A data network that provides business services to users.
  • the client is located in the terminal device and the server is located in the data network.
  • the data network can be a private network, such as a local area network, or an external network that is not controlled by the operator, such as the Internet. It can also be a proprietary network deployed by operators, such as an IP multimedia network subsystem. core network subsystem, IMS) service network.
  • IMS IP multimedia network subsystem
  • the core network user plane includes user plane function (UPF); the core network control plane includes access and mobility management function (AMF), session management function (SMF) , Unified data management (UDM), policy control function (PCF), application function (AF), network exposure function (NEF), etc.
  • UPF user plane function
  • AMF access and mobility management function
  • SMF session management function
  • UDM Unified data management
  • PCF policy control function
  • AF application function
  • NEF network exposure function
  • the core network control plane adopts a service-oriented architecture, and the interaction between control plane network elements adopts service invocation to replace the point-to-point communication method in the traditional architecture.
  • control plane network elements will open services to other control plane network elements. services for other control plane network elements to call; in point-to-point communication, the communication interface between control plane network elements will store a set of specific messages, which can only be used by the control plane network elements at both ends of the interface during communication.
  • Session management network element Mainly used for session management, IP address allocation and management of terminal equipment, selecting endpoints that can manage user equipment plane functions, policy control, or charging function interfaces, and downlink data notifications.
  • the session management network element can be an SMF network element.
  • the session management function network element can still be an SMF network element, or have other names. This application does not limit this.
  • Nsmf is a service-based interface provided by SMF. SMF can communicate with other network functions through Nsmf.
  • Access management network element also called access and mobility management network element: mainly used for mobility management and access management, etc., for example, it can be a mobility management entity in a 4G communication network. MME) function or AMF network element in the 5G network. In future communications such as 6G communications, the access management network element can still be an AMF network element, or have other names, which is not limited in this application. Namf is a service-based interface provided by AMF. AMF can communicate with other network functions through Namf.
  • Policy control network element A unified policy framework used to guide network behavior and provide policy rule information for control plane functional network elements (such as AMF, SMF, etc.).
  • the policy control network element can be a PCF network element.
  • future communications such as 6G communications, the policy control network element can still be a PCF network element, or have other names. This application does not limit this.
  • Npcf is a service-based interface provided by PCF. PCF can communicate with other network functions through Npcf.
  • Data management network element used to process user identification, subscription, access authentication, registration, or mobility management, etc.
  • the data management network element can be a UDM network element.
  • future communications such as 6G communication, the data management network element can still be a UDM network element, or have other names. This application does not limit this.
  • Nudm is a service-based interface provided by UDM. UDM can communicate with other network functions through Nudm.
  • Application network element used for data routing affected by applications, access to network open functions, or interaction with the policy framework for policy control, etc.
  • the application network element can be an AF network element.
  • future communications such as 6G communication, the application network element can still be an AF network element, or have other names. This application does not limit this.
  • Naf is a service-based interface provided by AF. AF can communicate with other network functions through Naf.
  • User plane network element used for packet routing and forwarding, or quality of service (QoS) processing of user plane data.
  • QoS quality of service
  • user plane network elements can be user plane function (UPF) network elements.
  • UPF user plane function
  • user plane network elements can still be UPF network elements, or have other names. This application There is no limit to this.
  • the core network may also include other network elements, which is not limited in this application.
  • Access technologies can be divided into two categories: 3GPP access technologies and non-3GPP access technologies.
  • 3GPP access technology refers to the access technology specified by 3GPP standards (for example, radio access technology).
  • 3GPP access technologies may include but are not limited to global system for mobile communications (GMS), general packet radio service (GPRS), long-term evolution Technology (long term evolution, LTE), at least one of long term evolution technology evolution (LTE-Advanced, LTE-A), and 5G new radio (new radio, NR).
  • GMS global system for mobile communications
  • GPRS general packet radio service
  • LTE long-term evolution Technology
  • LTE-A long term evolution technology evolution
  • LTE-A long term evolution technology evolution
  • 5G new radio new radio
  • Non-3GPP access technology refers to any access technology not specified by 3GPP standards.
  • Non-3GPP access technologies include but are not limited to world interoperability for microwave access (WiMAX, WiMAX), 3G mobile communication standards (code division multiple access 2000, CDMA2000), wireless network communication technology (Wi-Fi ), at least one of wireless local area network (WLAN) and fixed network.
  • WiMAX world interoperability for microwave access
  • WiMAX 3G mobile communication standards
  • CDMA2000 code division multiple access 2000
  • Wi-Fi wireless network communication technology
  • WLAN wireless local area network
  • fixed network fixed network.
  • non-3GPP access technologies refer to various types of non-cellular access technologies.
  • non-3GPP access technologies can be divided into two categories, namely trusted non-3GPP access technologies and untrusted non-3GPP access technologies.
  • trusted non-3GPP access technologies can interact directly with evolved packet core (EPC) and/or 5G core (5G core, 5GC), while untrusted non-3GPP access technologies pass network entities, such as Evolved Packet Data Gateway and/or 5G NR Gateway interact with EPC/5GC.
  • EPC evolved packet core
  • 5G core 5G core
  • untrusted non-3GPP access technologies pass network entities, such as Evolved Packet Data Gateway and/or 5G NR Gateway interact with EPC/5GC.
  • non-3GPP access technologies can be divided into two categories: access technologies that can be integrated with 5G networks and access technologies that cannot be integrated with 5G networks. It should be noted that both access technologies can provide wireless access capabilities for terminal devices.
  • 3GPP access technology can ensure differentiated processing of services, provide quality of service (QoS) guarantee, and achieve the best user experience.
  • QoS quality of service
  • Edge computing business can also be called edge application server (EAS) business.
  • EAS edge application server
  • edge computing services provide required services and cloud computing functions for terminal devices at the edge closer to the terminal device, integrating applications, content and mobile broadband (MBB)
  • MBB mobile broadband
  • the business processing and resource scheduling functions of the core network are deployed together at the edge of the network close to the terminal device. Through business processing close to the user, as well as the collaboration of applications, content and network, a reliable and ultimate business experience is provided.
  • the terminal device may include a modem layer, an operating system layer and an application layer, as shown in Figure 2.
  • the operating system layer and the application layer can also be collectively referred to as the upper-layer system.
  • the modulation and demodulation layer is implemented by a modem, which is the abbreviation of modulator and demodulator. It is called a modem in Chinese and is an electronic device that can realize the modulation and demodulation functions required for communication.
  • a modem in Chinese and is an electronic device that can realize the modulation and demodulation functions required for communication.
  • the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal, and transmit the demodulated low-frequency baseband signal to the baseband processor for processing. After the low-frequency baseband signal is processed by the baseband processor, it is passed to the upper layer system.
  • a modem can be a chip.
  • it can be an integrated circuit chip with signal processing capabilities.
  • the operating system layer can be an application processor on the terminal device.
  • the operating system provides interfaces to each application to implement different functions of the application layer; the operating system also provides commands to the modem layer.
  • the operating system layer and the modem layer can be integrated into the same wireless communication device or the same large chip (such as the system on a chip (SoC) commonly found in mobile phones).
  • SoC system on a chip
  • the application layer is composed of different applications, such as navigation applications, email applications and other user-oriented applications.
  • the terminal device needs to access the data network through the central UPF.
  • the central UPF is where the terminal device is when the session is established.
  • the UPF of the user plane IP address allocated by the terminal device is also the session anchor point for the terminal device to access the data network, and can also be called the main anchor point UPF.
  • the above deployment method is relatively simple, but has high requirements for backhaul network bandwidth, computer room throughput, and gateway specifications. The long distance of the backhaul network may cause large delays and jitter in user packet transmission.
  • the terminal device when a terminal device accesses EC services, the terminal device can access the local network through the edge UPF.
  • the edge UPF is the edge session anchor point when the terminal device accesses the local network, and can also be called a secondary anchor. Click UPF.
  • the local network here is the MEC server, also known as EAS.
  • the terminal device can obtain the routing selection policy (UE route selection policy, URSP) of the terminal device.
  • the URSP includes business information and access technology.
  • the access technology indicates the preferred access technology when the terminal device establishes a session.
  • the terminal device when a terminal device establishes a session to access service 1, the terminal device preferentially chooses to access service 1 through 3GPP access technology.
  • the terminal device When a terminal device establishes a session to access service 2, the terminal device preferentially chooses to access service 2 through non-3GPP access technology.
  • the terminal device can determine whether it is necessary to initiate handover to the access technology corresponding to the service according to user preferences. For example, when a terminal device accessing an EC service moves to a non-3GPP coverage area, if the user preference of the terminal device indicates that the priority of the non-3GPP access technology is higher than the priority of the 3GPP access technology, the terminal device will correspond to the EC service.
  • the access technology is switched from 3GPP access technology to non-3GPP access technology, that is, from the 3GPP side to the non-3GPP side.
  • EC services are distributed and deployed in the data network corresponding to data network access identifier (data network access identifier, DNAI) 1 and the data network corresponding to DNAI2.
  • DNAI can also be called the identification corresponding to the user plane connection for accessing EC services.
  • the terminal device If the terminal device is located in the service area of the EC service, taking DNAI1 as an example, the terminal device can establish a session through 3GPP access technology to access the EC service, that is, access the EC service through the data network corresponding to DNAI1.
  • the terminal device When the terminal device moves to a non-3GPP coverage area (for example, a wifi coverage area), the terminal device will switch the access technology corresponding to the EC service being accessed from 3GPP access to non-3GPP access according to user preferences, that is, from The EC service accessed by the data network corresponding to DNAI1 is switched to the EC service accessed through other data networks, which may cause the EC service to be interrupted or the path of the backhaul network to be detoured.
  • a non-3GPP coverage area for example, a wifi coverage area
  • Scenario 1 When the non-3GPP access technology that the terminal device switches to can access the 5G network (that is, it can be integrated with the 5G network as mentioned above), due to the gateway corresponding to the non-3GPP access technology, such as the non-3GPP interworking function ( non-3GPP interworking function (N3IWF), its deployment location is usually relatively high, and the EC services accessed by the terminal device are implemented through the local UPF deployed at a relatively low location. Therefore, the terminal device needs to communicate with the network element from the lower deployment location. The communication is switched to the network element deployed at a higher position. In the above situation, the path of the backhaul network will be detoured and the transmission delay of business data will be increased.
  • N3IWF non-3GPP interworking function
  • Scenario 2 When the non-3GPP access technology switched to by the terminal device cannot access the 5G network (that is, it cannot be integrated with the 5G network as mentioned above), at this time, because the non-3GPP access technology is not controlled by the 5G network, Switching the access technology corresponding to the EC service being accessed from 3GPP access to non-3GPP access may cause service interruption of the EC service.
  • the terminal device accessing the EC service moves to a non-3GPP coverage area, the above-mentioned problems of interruption of the EC service or roundabout paths of the backhaul network may occur.
  • this application provides a communication method to solve the problem of EC service interruption or detour of the backhaul network path.
  • the session management network element determines that the terminal device accesses the edge computing service, it can instruct the terminal device not to allow the access technology corresponding to the service to be switched away from 3GPP access, thereby enabling the terminal device to select an edge application that is closer to the distance.
  • Server access to edge computing services can ensure the continuity of edge computing services as well as low service latency and high reliability.
  • the method includes:
  • Step 500 The session management network element receives the identification of the service accessed by the terminal device.
  • the identifier of the service can be a fully qualified domain name (fully qualified domain name, FQDN), or IP quintuple, or IP triplet, or application (application, APP) identification (APP ID), etc.
  • the terminal device sends a domain name system (DNS) query (DNS query) message to the edge application server discovery function (EASDF) network element, where the DNS query message includes the information accessed by the terminal device.
  • DNS query domain name system
  • EASDF edge application server discovery function
  • the EASDF network element sends the identifier of the service accessed by the terminal device to the session management network element.
  • the session management network element can configure the EASDF network element with an identifier corresponding to the edge computing service, and instruct the EASDF network element to send a reporting message to the session management network element when it detects the identifier corresponding to the edge computing service. Furthermore, the EASDF network element can determine whether the service corresponding to the identifier of the service received from the terminal device is an edge computing service based on the identifier corresponding to the edge computing service. If so, send the identifier of the service to the session management network element.
  • Step 510 When the service is an edge computing service, the session management network element sends instruction information to the terminal device, and the instruction information instructs the terminal device not to allow the access technology corresponding to the service to be switched away from 3GPP access.
  • the session management network element may determine that the service is an edge computing service according to the identifier of the service.
  • the session management network element can omit step 510, or In this case, when the session management network element receives the service identifier sent by the EASDF network element, it can directly determine that the service corresponding to the service identifier is an edge computing service.
  • the session management network element can also obtain edge computing service deployment information, which can also be called EAS deployment information.
  • the session management network element may receive edge computing service deployment information from the application function network element.
  • the application function network element sends edge computing service deployment information to a network exposure function (NEF) network element, and the session management network element obtains the edge computing service deployment information from the NEF network element.
  • the edge computing service deployment information may include the correspondence between DNAI and FQDN.
  • the session management network element can determine whether the service accessed by the terminal device is an edge computing service based on the corresponding relationship between DNAI and FQDN and the identification of the service accessed by the terminal.
  • the identifier of the service accessed by the terminal device is FQDN1
  • the session management network element determines that the DNAI corresponding to FQDN1 exists, and then determines that the service corresponding to FQDN1 is an edge computing service.
  • the session management network element can also verify again that the service accessed by the terminal device is an EC service through the above implementation method.
  • the instruction information indicates that the terminal device is not allowed to switch the access technology corresponding to the service from 3GPP. It can also be described as: the instruction information indicates that the terminal device is not allowed to switch the access technology corresponding to the service from 3GPP. Switch to non-3GPP access; or, the instruction information instructs the terminal device to retain the access technology corresponding to the service as 3GPP access; or the instruction information instructs the terminal device not to allow the access technology corresponding to the service to be switched to a non-3GPP access. enter.
  • the switching of the access technology corresponding to the service may be a switching of service granularity, or the switching of the access technology corresponding to the service may be a switching of session granularity.
  • the terminal device can establish session 1 accessed through 3GPP, and session 1 can be used to access multiple services.
  • session 1 can carry service 1 and service 2, where service 1 is an edge computing service and service 2 is a non-edge computing service. business.
  • the session management network element determines that service 1 is an edge computing service, the session management network element can indicate information to the terminal device.
  • the indication information indicates that the terminal device is not allowed to switch the access technology corresponding to the service away from 3GPP access, which can be understood as The indication information indicates that the terminal device is not allowed to switch the access technology corresponding to service 1 from 3GPP access. At this time, the switching of the access technology corresponding to the service is specifically the switching of service granularity.
  • the indication information indicates that the terminal device is not allowed to switch the access technology of the session corresponding to service 1 (ie, session 1) from 3GPP access. That is, the indication information indicates that the indication information indicates that the terminal device is not allowed to switch the access technology of the session corresponding to service 1.
  • the access technology is switched away from 3GPP access, and the access technology corresponding to service 2 is not allowed to be switched away from 3GPP access. At this time, the switching of the access technology corresponding to the service is specifically the switching of session granularity.
  • the indication information can be carried through new information elements. For example, if this information element is included in the message sent by the session management network element to the terminal device, it indicates that the access technology corresponding to the service is not allowed to be switched away from 3GPP access. It is not included in the message sent by the session management network element to the terminal device. This information element indicates that the access technology corresponding to the service is allowed to be switched away from 3GPP access.
  • the indication information can also be carried through new bits. For example, the newly added bit occupies 1 bit. When the 1 bit is "1", it indicates that the access technology corresponding to the service is not allowed to be switched away from the 3GPP access. Among them, the 1 bit is "1", which can also be called Set the indication bit.
  • the indication information can also be carried through area information. Wherein, the indication information is carried through the area information. For details, please refer to the relevant description below. It can be understood that this application does not limit the specific carrying method of the indication information.
  • the session management network element sends a session modification command to the terminal device, where the session modification command includes the indication information.
  • the session modification command may also include the identifier of the service accessed by the terminal device to determine the service indicated by the indication information.
  • the terminal device may determine the corresponding relationship between the service identifier and the indication information based on the received service identifier, that is, determine the services indicated by the indication information that are not allowed to be switched away from 3GPP access.
  • the session management network element obtains the configuration information, and the session management network element sends the instruction information to the terminal device according to the configuration information.
  • the configuration information indicates that the network side is allowed to control the access technology corresponding to the service.
  • the network side can be understood as a non-terminal device side, which allows the network side to control the access technology corresponding to the service. It can be understood that the network side can participate in controlling the access technology corresponding to the service.
  • the session management network element controls the access technology corresponding to the service according to the configuration information. That is, the session management network element can send instruction information to the terminal device according to the configuration information.
  • the configuration information indicates that the network side is allowed to control the access technology corresponding to the service. It can also be described as: the configuration information can indicate that the access technology corresponding to the service is not allowed to be switched away from 3GPP access; or, the configuration information can Indicate that the access technology corresponding to the service is not allowed to be switched to non-3GPP access; or, the configuration information may indicate that the access technology corresponding to the service is not allowed to be switched from 3GPP access to non-3GPP access; or, configure information The access technology corresponding to the service may be instructed to maintain 3GPP access; or the configuration information may indicate that the service requires priority to ensure service experience.
  • the configuration information can be carried through a new cell. For example, if the message received by the session management network element includes this cell, it indicates that the network side is allowed to control the access technology corresponding to the service. In the session management If the message received by the network element does not include this information element, it means that the network side is not allowed to control the access technology corresponding to the service.
  • configuration information can also be carried through new bits. For example, the newly added bit occupies 1 bit. When the 1 bit is "1", it indicates that the network side is allowed to control the access technology corresponding to the service. When the 1 bit is "0", it indicates that the network side is not allowed to control the access technology. The access technology corresponding to the service. It can be understood that this application does not limit the specific carrying method of the configuration information.
  • the session management network element may receive the configuration information from the application function network element.
  • the session management network element may obtain the configuration information from the subscription data of the terminal device.
  • the terminal device initiates a session establishment process.
  • the session management network element may obtain the subscription data of the terminal device, and the subscription data of the terminal device includes the configuration information.
  • the application function network element can send the configuration information to the capability opening function network element, and then the capability opening function network element sends the configuration to the data management network element or the data storage (unified data repository, UDR) network element. information.
  • the policy control function network element may obtain the subscription data of the terminal device from the data management network element or the data storage network element, and the subscription data of the terminal device includes the configuration information.
  • the policy control function network element determines the policy of the terminal device according to the subscription data of the terminal device, and sends the policy of the terminal device to the session management network element, where the policy of the terminal device includes the configuration information.
  • the indication information is sent to the terminal device.
  • the session management network element may determine that the terminal device is located in the service area of the service based on the location information of the terminal device and the service area of the service, that is, the terminal device can access the service, or the terminal device supports access to the service. That is to say, when the session management network element determines that the terminal device can access the service, it sends indication information to the terminal device.
  • the service area of the business can also be called the deployment area of the business.
  • the service area of the service can be determined by the edge computing service deployment information.
  • the session management network element may send first indication information to the terminal device, and the first indication information instructs the terminal device to allow the service to be transferred to the service area.
  • the corresponding access technology is switched away from 3GPP access.
  • the session management network element may determine that the terminal device is outside the service area of the service based on the moved location information of the terminal device and the service area of the service, that is, the terminal device cannot access the service, or the terminal device does not support access to the service. business.
  • the first indication information may be updated indication information.
  • the bits corresponding to the first indication information and the bits corresponding to the indication information are the same bits.
  • the session management network element can update the previously sent instruction information, that is, send the updated instruction information to the terminal device, thereby ensuring that the terminal device selects an appropriate access technology to access the service.
  • the session management network element may also send the service identifier to the terminal device to determine the service indicated by the updated indication information.
  • the terminal device can establish a correspondence between the service identifier and the updated indication information based on the received service identifier, that is, determine the services indicated by the indication information that are allowed to be switched away from 3GPP access.
  • the first indication information and the indication information respectively belong to different information elements.
  • the session management network element when the terminal device moves outside the service area of the service, the session management network element sends a message to the terminal device.
  • the message includes the cell where the first indication information is located and does not include the cell where the indication information is located. . at this time,
  • the session management network element can also send service identifiers to the terminal device to determine the services that are allowed to leave from 3GPP access handover.
  • the session management network element may not send any indication information to the terminal device. If the terminal device does not receive any instruction information, the terminal device considers that it can again determine whether to switch the access technology of the service according to the user's preference.
  • the session management network element may also determine area information, where the area indicated by the area information is part or all of the service area of the service.
  • the session management network element can also send area information to the terminal device.
  • the indication information is area information. Therefore, the area information can be used to instruct the terminal device that the access technology corresponding to the service is not allowed to switch away from 3GPP access in the area indicated by the area information.
  • the indication information and the area information are two different information elements.
  • the terminal device determines based on the indication information and the area information that the access technology corresponding to the service is not allowed to switch away from 3GPP access in the area indicated by the area information. .
  • the area information can be used to determine whether it is located in the area indicated by the area information, that is, to determine whether the service can be accessed.
  • the session management network element may determine the area information based on the edge computing service deployment information.
  • the edge computing service deployment information indicates that the service area of the service includes DNAI1 and DNAI2, then the area information can be understood as one or more TAIs corresponding to DNAI1 and DNAI2.
  • the session management network element may determine the area information based on the mobility mode information of the terminal device and the service area of the service, where the mobility mode information of the terminal device indicates the mobility area or range of the terminal device, the mobility speed of the terminal device, or the service area of the terminal device. At least one of the device's movement directions. For example, if the mobile range of the terminal device is Beijing, and the service areas of the business are Haidian District, Beijing, Chaoyang District, Beijing, Yangpu District, Shanghai, and Minhang District, Shanghai, then the area information can indicate Beijing, or Haidian District, Beijing and Beijing Chaoyang District.
  • area information can be represented by tracking area identity (TAI), DNAI, or cell ID.
  • TAI tracking area identity
  • DNAI DNAI
  • cell ID cell ID
  • the session management network element can enable the terminal device to determine the effective range or applicable range of the indication information. And when the area indicated by the area information is part of the service area of the service, area information can be provided for the terminal device according to the actual movement of the terminal device, thereby reducing signaling overhead.
  • Step 520 The terminal device receives the instruction information from the session management network element.
  • the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, the terminal device does not change the access technology corresponding to the service according to the instruction information. Handover from 3GPP access.
  • the terminal device accessing the service through 3GPP can be understood as the terminal device establishing a session through the 3GPP access technology, and the session is used to access the service.
  • the user preference of the terminal device may indicate that the priority of the non-3GPP access technology is higher than that of the 3GPP access technology. That is to say, in this application, when the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, if the terminal device receives the instruction information for the service, the user preference does not determine whether to initiate the access.
  • the basis for access technology switching is that the terminal device determines whether to initiate access technology switching based on the instruction information.
  • the terminal device only determines the access technology corresponding to the service based on user preferences, which may cause the edge computing service to be interrupted or The problem of the circuitous path of the backhaul network can be avoided by using the method provided by the embodiments of the present application.
  • the terminal device determines whether to initiate handover of the access technology corresponding to the service from 3GPP access based on the indication information and the area information. For example, the terminal device can determine the location according to the area information and The own location information determines whether the terminal device is located in the service area of the service, or determines whether the terminal device can access the service based on the area information and its own location information. If the terminal device can determine that the terminal device is located in the service area of the service based on the area information and its own location information (that is, the terminal device can access the service), the terminal device does not switch the access technology corresponding to the service away from 3GPP access.
  • AT command is a control protocol invented by Hayes, the inventor of the dial-up modem, to control the modem.
  • AT is the abbreviation of Attention, and the protocol itself uses text. Every command starts with AT, hence the name.
  • Scenario 1 The modulation and demodulation layer determines whether to initiate switching of the access technology corresponding to the service from the 3GPP access, as shown in Figure 6.
  • Step 1 The modulation and demodulation layer receives the indication information.
  • Step 2 The modulation and demodulation layer saves the indication information.
  • the modulation and demodulation layer stores the corresponding relationship between the indication information and the identity of the service corresponding to the indication information.
  • Step 3 When the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, the operating system layer sends a request message to the modem layer.
  • the request message is used to determine whether to initiate handover of the access technology corresponding to the service from 3GPP access.
  • the request message may also be described as being used to request the modem layer to switch the access technology corresponding to the service away from the 3GPP access.
  • the request message includes the identification of the service.
  • the application layer can send application-related parameters to the operating system layer, such as user preferences corresponding to the service and identification of the service.
  • Step 4 The modulation and demodulation layer determines not to switch the access technology corresponding to the service away from the 3GPP access according to the indication information.
  • Step 5 The modem layer sends a response message to the operating system layer.
  • the response message indicates that the access technology corresponding to the service is not to be switched away from 3GPP access.
  • the modulation and demodulation layer if it does not save the indication information corresponding to the service, it initiates switching of the access technology corresponding to the service from 3GPP access.
  • Scenario 2 The operating system layer determines whether to initiate handover of the access technology corresponding to the service from the 3GPP access, as shown in Figure 7.
  • Step 1 The modulation and demodulation layer receives the indication information.
  • Step 2 The modem layer sends indication information to the operating system layer.
  • Step 3 The operating system layer saves the instruction information.
  • the operating system layer stores the corresponding relationship between the indication information and the identity of the service corresponding to the indication information.
  • Step 4 When the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, the operating system layer determines not to switch the access technology corresponding to the service away from 3GPP access based on the instruction information.
  • the modem layer is instructed to initiate switching of the access technology corresponding to the service from 3GPP access.
  • this application also provides a communication method to solve the problem of EC service interruption or roundabout path of the backhaul network.
  • the policy can include Including instruction information corresponding to the edge computing service, the instruction information indicates that the terminal device is not allowed to switch the access technology corresponding to the edge computing service away from 3GPP access, thereby enabling the terminal device to select a nearby edge application server to access edge computing. Services can ensure the continuity of edge computing services as well as low service latency and high reliability.
  • the method includes:
  • Step 800 The policy control network element determines the policy of the terminal device.
  • the policy of the terminal device includes instruction information, where the instruction information indicates that the terminal device is not allowed to switch the access technology of the service away from 3GPP access.
  • the service is an edge computing service. .
  • the indication information may have multiple possible description methods. For details, please refer to the description of relevant content in the embodiment shown in FIG. 5 .
  • the policy control network element may obtain the subscription data of the terminal device, and the subscription data of the terminal device includes the identification of the service subscribed by the terminal device.
  • the identification of the contracted service can be represented by at least one or more of the data network name (data network name, DNN), single network slice selection assistance information (NSSAI), APP ID, FQDN, etc. .
  • the policy control network element can obtain the subscription data of the terminal device from the data management network element.
  • the policy control network element can obtain edge computing service deployment information or local configuration information, and determine based on the edge computing service deployment information or local configuration information that the services contracted by the terminal device include edge computing services.
  • the policy control network element can generate a corresponding policy for the edge computing service, that is, the policy includes indication information, which indicates that the terminal device is not allowed to switch the access technology of the edge computing service away from 3GPP access.
  • the policy control network element may receive edge computing service deployment information from the application function network element.
  • the application function network element can send the edge computing service deployment information to the NEF, and the NEF sends the received edge computing service deployment information to the data management network element or the data storage network element.
  • the policy control network element can obtain edge computing service deployment information from the data management network element or data storage network element.
  • the policy control network element before the policy control network element determines the policy of the terminal device, the policy control network element obtains configuration information, and the policy control network element determines the policy of the terminal device based on the configuration information.
  • the configuration information indicates that the network side is allowed to control the access technology corresponding to the service.
  • the policy control network element may receive the configuration information from the application function network element.
  • the policy control network element may obtain the configuration information from subscription data of the terminal device.
  • the policy of the terminal device may also include an access technology corresponding to the service, where the access technology corresponding to the service may be 3GPP access. Therefore, the terminal device can preferentially choose to access the service through the 3GPP access technology.
  • the policy of the terminal device may also include an identifier of the service to determine the service indicated by the indication information.
  • the terminal device may determine the corresponding relationship between the service identifier and the instruction information based on the received service identifier and instruction information. For another example, the terminal device may determine the corresponding relationship between the service identifier, the access technology corresponding to the service and the instruction information based on the received service identifier, the access technology corresponding to the service and the instruction information.
  • the access technology of EC service 1 is 3GPP.
  • the indication information of EC service 1 can be represented by Flag.
  • the Flag value is 1, indicating that the access technology of EC service 1 is not allowed to be switched away from 3GPP access. .
  • the policy of the terminal device may also include area information, and the area indicated by the area information is part or all of the service area of the service.
  • the area information is ⁇ TAI1, TAI2 ⁇
  • the indication information of EC service 1 can be represented by Flag.
  • the value of Flag is 1, indicating that it is not allowed. Switch the access technology of EC service 1 away from 3GPP access.
  • the area information of EC service 1 is ⁇ TAI1, TAI2 ⁇
  • the indication information indicates that the access technology of EC service 1 is not allowed to be switched away from 3GPP access in the area shown by ⁇ TAI1, TAI2 ⁇ .
  • Step 810 The policy control network element sends the policy of the terminal device to the terminal device.
  • the policy control network element when the terminal device is located in the service area of the service, the policy control network element sends the policy to the terminal device.
  • the policy control network element determines that the terminal device is located in the service area of the service, reference may be made to the relevant content of the session management network element in determining that the terminal device is located in the service area of the service in the embodiment shown in FIG. 5 .
  • the policy control network element sends the policy to the terminal device, when the terminal device moves outside the coverage area of the service, the policy control network element sends the updated policy to the terminal device.
  • the updated policy includes first indication information, and the first indication information instructs the terminal device to allow the access technology of the service to be switched away from 3GPP access.
  • the first indication information may be updated indication information.
  • the bits corresponding to the first indication information and the bits corresponding to the indication information are the same bits; or the first indication information and the indication information respectively belong to different cells.
  • the updated policy may also include an updated access technology corresponding to the service, and the updated access technology corresponding to the service is 3GPP access or non-3GPP access.
  • the access technology of EC service 1 is 3GPP or non-3GPP
  • the first indication information can be updated indication information.
  • the indication information of EC service 1 can be represented by Flag, and the value of Flag is 0. Indicates that the access technology of EC service 1 is allowed to be switched away from 3GPP access.
  • the updated policy does not include the first indication information.
  • the updated policy may also include the access technology corresponding to the updated service.
  • the updated policy may not include the first indication information, but include the access technology corresponding to the updated service.
  • the access technology of EC service 1 is 3GPP or non-3GPP. At this time, it may also be indicated that the access technology of EC service 1 is allowed to be switched away from 3GPP access.
  • Step 820 The terminal device receives the policy of the terminal device from the policy control network element.
  • the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, the terminal device does not change the policy according to the instruction information.
  • the access technology corresponding to the service is switched away from 3GPP access.
  • step 820 specific reference may be made to the relevant content of step 520.
  • the UE starts EC service 1 on TAI1.
  • the UE establishes a session through 3GPP access technology to access EC service 1.
  • the UE moves to a non-3GPP coverage area and the UE's user preference indicates that the non-3GPP access technology has a high priority
  • the UE policy also indicates that the UE is not allowed to switch the access technology of EC service 1 away from 3GPP access
  • the UE EC service 1 is also not switched away from 3GPP access.
  • the UE checks the UE policy and determines that the currently ongoing EC service 1 is not allowed to be switched away from 3GPP access, so the UE does not switch EC service 1 away from 3GPP access.
  • FIG. 9 shows a possible exemplary block diagram of a communication device involved in the embodiment of the present application.
  • the device 900 includes: a transceiver unit 920 and a processing unit 910.
  • the transceiver unit 920 may include a receiving unit and a sending unit.
  • the processing unit 910 is used to control and manage the actions of the device 900 .
  • the transceiver unit 920 is used to support communication between the device 900 and other network entities.
  • the device 900 may further include a storage unit used to store program codes and data of the device 900 .
  • each unit in the device 900 may be implemented by software.
  • the processing unit 910 may be a processor or a controller, such as a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), or an application-specific integrated circuit. specific integrated circuits (ASIC), field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logical blocks, units and circuits described in connection with the disclosure of the embodiments of this application.
  • the processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the transceiver unit 920 may be a communication interface, a transceiver, a transceiver circuit, etc., where the communication interface is a general term.
  • the communication interface may include multiple interfaces, and the storage unit may be a memory.
  • the processing unit 910 in the device 900 can support the device 900 to perform the actions of the session management network element in the above method examples.
  • the transceiver unit 920 can support the device 900 to communicate with the terminal device.
  • the transceiver unit 920 can support the device 900 to perform steps 500 and 510 in FIG. 5 .
  • the processing unit 910 calls the transceiver unit 920 to perform: receiving the identification of the service accessed by the terminal device; when the service is an edge computing service, determining that the service is an edge computing service, and sending instruction information to the terminal device.
  • the indication information indicates that the terminal device is not allowed to switch the access technology corresponding to the service away from 3GPP access.
  • the transceiver unit 920 is configured to send indication information to the terminal device when the service is an edge computing service and the terminal device is located in a service area of the service.
  • the transceiver unit 920 is configured to send first indication information to the terminal device when the terminal device moves outside the service area of the service.
  • the first indication information Instruct the terminal device to allow the access technology corresponding to the service to be switched away from 3GPP access.
  • the processing unit 910 is used to determine area information, and the area indicated by the area information is part or all of the service area of the service; the transceiving unit 920 is used to send the information to the terminal device. Describe regional information.
  • the transceiver unit 920 is configured to receive configuration information from an application function network element before sending instruction information to the terminal device.
  • the configuration information indicates that the network side is allowed to control the service corresponding to the service. access technology.
  • the device 900 may correspond to the session management network element in the foregoing method embodiment, and the operations and/or functions of each unit in the device 900 are respectively to implement the session management network element in the foregoing method embodiment.
  • the corresponding steps of the method can also achieve the beneficial effects in the foregoing method embodiments. For the sake of simplicity, they will not be described again here.
  • the processing unit 910 in the device 900 can support the device 900 to perform the actions of the terminal device in the above method examples. For example, it can support the device 900 to perform step 520 in Figure 5, Or step 820 in Figure 8.
  • the transceiver unit 920 may support the device 900 to communicate with the session management device or the policy control device.
  • the transceiver unit 920 may support the device 900 to perform step 510 in FIG. 5 or step 810 in FIG. 8 .
  • the transceiver unit 920 receives indication information indicating that the terminal device is not allowed to switch the access technology corresponding to the service away from 3GPP access; the processing unit 910 is used to access the terminal device through 3GPP When the service and the terminal device move to a non-3GPP coverage area, the access technology corresponding to the service is not switched away from the 3GPP access according to the instruction information.
  • the user preference of the terminal device indicates that the priority of the non-3GPP access technology is higher than the priority of the 3GPP access technology.
  • the transceiver unit 920 is configured to receive the indication information from the session management network element; or, receive the indication information from the policy control network element.
  • the transceiver unit 920 is configured to receive area information, and the area indicated by the area information is part or all of the service area of the service; When the access technology corresponding to the service is switched away from 3GPP access, the access technology corresponding to the service is not switched away from 3GPP access according to the instruction information and the area information.
  • the modulation and demodulation layer of the terminal device when the terminal device receives the indication information, the modulation and demodulation layer of the terminal device receives the indication information; when the terminal device does not convert the service corresponding to the service according to the indication information.
  • the modulation and demodulation layer of the terminal device receives a request message from the operating system layer of the terminal device. The request message is used to determine whether to initiate the transfer of the service corresponding to the service.
  • the access technology is switched away from the 3GPP access; the modulation and demodulation layer of the terminal device determines not to switch the access technology corresponding to the service away from the 3GPP access according to the instruction information; the terminal device The modulation and demodulation layer sends a response message to the operating system layer of the terminal device, where the response message indicates not to switch the access technology corresponding to the service away from the 3GPP access.
  • the modulation and demodulation layer of the terminal device receives the indication information
  • the modulation and demodulation layer of the terminal device sends a request to the operating system of the terminal device.
  • the layer sends the indication information; when the terminal device does not switch the access technology corresponding to the service from the 3GPP access according to the indication information, the operating system layer of the terminal device uses the indication information to It is determined not to switch the access technology corresponding to the service away from the 3GPP access.
  • the apparatus 900 may correspond to the terminal equipment in the foregoing method embodiments, and the operations and/or functions of each unit in the apparatus 900 are respectively to implement the corresponding steps of the method of the terminal equipment in the foregoing method embodiments. , therefore the beneficial effects in the foregoing method embodiments can also be achieved. For the sake of simplicity, they will not be described again here.
  • the processing unit 910 in the device 900 can support the device 900 to perform the actions of the policy control network element in the above method examples.
  • the processing unit 910 in the device 900 can support the device 900 to perform the actions of the policy control network element in the above method examples.
  • the transceiver unit 920 may support the device 900 to communicate with the terminal device.
  • the transceiver unit 920 may support the device 900 to perform step 810 in FIG. 8 .
  • the processing unit 910 is configured to determine a policy of the terminal device; the policy of the terminal device includes indication information, wherein the indication information indicates that the terminal device is not allowed to switch the access technology of the service away from 3GPP access,
  • the service is an edge computing service;
  • the transceiver unit 920 is configured to send the policy to the terminal device.
  • the policy further includes area information, and the area indicated by the area information is part or all of the service area of the service.
  • the processing unit 910 is configured to determine the area information according to the movement mode information of the terminal device; wherein the movement mode information of the terminal device indicates the movement area or movement range of the terminal equipment. , at least one of the moving speed of the terminal device or the moving direction of the terminal device.
  • the policy further includes an access technology corresponding to the service, where the access technology corresponding to the service is 3GPP access.
  • the transceiver unit 920 is configured to receive configuration information from the application function network element before determining the policy of the terminal device.
  • the configuration information indicates that the network side is allowed to control the access technology corresponding to the service. .
  • the transceiver unit 920 is configured to send the policy to the terminal device when the terminal device is located in the service area of the service.
  • the transceiver unit 920 is configured to send the policy to the terminal device when the terminal device moves outside the coverage area of the service after the policy control network element sends the policy to the terminal device.
  • the terminal device sends an updated policy, wherein the updated policy does not include the indication information, or the updated policy includes first indication information, and the first indication information indicates that the terminal device allows Switch the access technology of the service away from the 3GPP access.
  • the updated policy includes an updated access technology corresponding to the service, and the updated access technology corresponding to the service is the 3GPP access or the non-3GPP access. enter.
  • the device 900 may correspond to the policy control network element in the foregoing method embodiment, and the operations and/or functions of each unit in the device 900 are respectively to implement the policy control network element in the foregoing method embodiment.
  • the corresponding steps of the method can also achieve the beneficial effects in the foregoing method embodiments. For the sake of simplicity, they will not be described again here.
  • Figure 10 shows a schematic structural diagram of a communication device 1000 according to an embodiment of the present application.
  • the device 1000 includes: a processor 1001.
  • the processor 1001 when the device 1000 is a session management network element or a chip in a session management network element, in a possible implementation, when the processor 1001 is used to call an interface to perform the following actions: receive the identification of the service accessed by the terminal device; determine The service is an edge computing service, and indication information is sent to the terminal device. The indication information indicates that the terminal device is not allowed to switch away the access technology corresponding to the service from 3GPP access.
  • the device 1000 can also be used to perform other steps and/or operations on the session management network element side in the previous embodiments. For the sake of brevity, they will not be described again here.
  • the indication information indicates that the terminal device does not allow
  • the access technology corresponding to the service is allowed to be switched away from 3GPP access; when the terminal device accesses the service through 3GPP and the terminal device moves to a non-3GPP coverage area, the instruction information is not used to switch the access technology to a non-3GPP coverage area.
  • the access technology corresponding to the above services is switched away from 3GPP access.
  • the device 1000 can also be used to perform other steps and/or operations on the terminal device side in the previous embodiments. For the sake of brevity, they will not be described again here.
  • the processor 1001 when the processor 1001 is used to call an interface to perform the following actions: determine the policy of the terminal device;
  • the policy includes instruction information, wherein the instruction information indicates that the terminal device is not allowed to switch the access technology of the service away from 3GPP access, and the service is an edge computing service;
  • the transceiver unit 920 is used to send a message to the terminal The device sends the policy.
  • the device 1000 can also be used to perform other steps and/or operations on the policy control network element side in the previous embodiments. For the sake of brevity, they will not be described again here.
  • the processor 1001 can call an interface to perform the above transceiver action, where the called interface can be a logical interface or a physical interface, which is not limited.
  • the physical interface can be implemented via transceivers.
  • the device 1000 further includes a transceiver 1003.
  • the device 1000 also includes a memory 1002, in which the program code in the above method embodiment can be stored, so that the processor 1001 can call it.
  • the device 1000 includes a processor 1001, a memory 1002, and a transceiver 1003, the processor 1001, the memory 1002, and the transceiver 1003 communicate with each other through internal connection paths to transmit control and/or data signals.
  • the processor 1001, the memory 1002, and the transceiver 1003 can be implemented on a chip.
  • the processor 1001, the memory 1002, and the transceiver 1003 can be implemented on the same chip, or they can be implemented on different chips. Or any two functions can be combined in one chip.
  • the memory 1002 can store program codes, and the processor 1001 calls the program codes stored in the memory 1002 to implement corresponding functions of the device 1000 .
  • the system includes a session management network element, an edge application server discovery function network element, an application function network element, a capability opening function network element, a data management network element, a data storage network element, and a policy control network.
  • a session management network element One or more of the elements or terminal devices, wherein the terminal device is used to perform the steps and/or operations on the terminal device side in the previous embodiments, and the session management network element is used to perform the session in the previous embodiments. Steps and/or operations on the management network element side.
  • the policy control network element is used to perform the steps and/or operations on the policy control network element side in the previous embodiments.
  • the application function network element, the capability opening function network element, and the data management network The element or data storage network element can perform the corresponding steps and/or operations in the previous embodiments.
  • the methods disclosed in the above embodiments of the present application can be applied in a processor or implemented by the processor.
  • the processor may be an integrated circuit chip that has signal processing capabilities. During the implementation process, each step of the above method embodiment can be completed through an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the above-mentioned 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 (field programmable gate array, FPGA), or other available processors.
  • Programmable logic devices discrete gate or transistor logic devices, discrete hardware components, system on chip (SoC), central processor unit (CPU), or network processor (network processor) processor (NP), it can also be a digital signal processor (DSP), it can also be a microcontroller (micro controller unit, MCU), it can also be a programmable logic device (PLD) or other Integrated chip.
  • SoC system on chip
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processor
  • MCU microcontroller
  • PLD programmable logic device
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • RAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic.
  • the various numerical numbers or serial numbers involved in the above processes are only for convenience of description and should not constitute any limitation on the implementation process of the embodiments of the present application.
  • the above is an example of three elements A, B and C to illustrate the optional items of the project.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device 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 coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can 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 the present application is essentially or the part that contributes to the existing technology or the 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 execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory ROM, random access memory RAM, magnetic disk or optical disk and other various media that can store program codes.

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

Abstract

L'invention concerne un procédé et un appareil de communication. Le procédé consiste : à recevoir, au moyen d'un élément de réseau de gestion de session, un identifiant d'un service auquel un dispositif terminal a accès ; et, lorsque le service est un service informatique périphérique, à envoyer des informations d'indication au dispositif terminal, les informations d'indication indiquant que le dispositif terminal ne permet pas à la technologie d'accès, qui correspond au service, d'être changée loin d'un accès 3GPP. Au moyen du procédé, un dispositif terminal peut sélectionner un serveur d'application périphérique relativement proche pour avoir accès à un service informatique périphérique de telle sorte que la continuité du service informatique périphérique et le faible retard et la fiabilité élevée du service puissent être assurés.
PCT/CN2023/081070 2022-03-28 2023-03-13 Procédé et appareil de communication WO2023185435A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016086359A1 (fr) * 2014-12-02 2016-06-09 华为技术有限公司 Procédé pour garder une continuité de service, station de base et système
US9408067B1 (en) * 2013-12-02 2016-08-02 Taqua, Llc Selectively disallowing use of media over data calling in a segment based on segment characteristics
CN111866950A (zh) * 2020-06-16 2020-10-30 华为技术有限公司 Mec中数据传输的方法和通信装置
CN113132908A (zh) * 2019-12-31 2021-07-16 华为技术有限公司 一种业务管理方法及装置
WO2021203944A1 (fr) * 2020-04-07 2021-10-14 华为技术有限公司 Procédé de communication et appareil de communication
CN113630749A (zh) * 2021-07-07 2021-11-09 华为技术有限公司 一种获取边缘服务的方法和装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9408067B1 (en) * 2013-12-02 2016-08-02 Taqua, Llc Selectively disallowing use of media over data calling in a segment based on segment characteristics
WO2016086359A1 (fr) * 2014-12-02 2016-06-09 华为技术有限公司 Procédé pour garder une continuité de service, station de base et système
CN113132908A (zh) * 2019-12-31 2021-07-16 华为技术有限公司 一种业务管理方法及装置
WO2021203944A1 (fr) * 2020-04-07 2021-10-14 华为技术有限公司 Procédé de communication et appareil de communication
CN111866950A (zh) * 2020-06-16 2020-10-30 华为技术有限公司 Mec中数据传输的方法和通信装置
CN113630749A (zh) * 2021-07-07 2021-11-09 华为技术有限公司 一种获取边缘服务的方法和装置

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