WO2020062174A1 - 一种控制数据传输方法、网络设备和存储介质 - Google Patents

一种控制数据传输方法、网络设备和存储介质 Download PDF

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Publication number
WO2020062174A1
WO2020062174A1 PCT/CN2018/108836 CN2018108836W WO2020062174A1 WO 2020062174 A1 WO2020062174 A1 WO 2020062174A1 CN 2018108836 W CN2018108836 W CN 2018108836W WO 2020062174 A1 WO2020062174 A1 WO 2020062174A1
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Prior art keywords
network device
delay information
core network
access network
delay
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PCT/CN2018/108836
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English (en)
French (fr)
Inventor
许阳
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2018/108836 priority Critical patent/WO2020062174A1/zh
Priority to PCT/CN2019/080636 priority patent/WO2020062819A1/zh
Priority to EP19867907.8A priority patent/EP3846540B1/en
Priority to AU2019350015A priority patent/AU2019350015A1/en
Priority to JP2021517257A priority patent/JP2022502929A/ja
Priority to CN201980005883.6A priority patent/CN111466137A/zh
Priority to CN202010688032.0A priority patent/CN111885640B/zh
Priority to KR1020217012610A priority patent/KR20210068081A/ko
Priority to SG11202103212XA priority patent/SG11202103212XA/en
Priority to TW108135346A priority patent/TW202025696A/zh
Publication of WO2020062174A1 publication Critical patent/WO2020062174A1/zh
Priority to US17/035,532 priority patent/US11503531B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • the present invention relates to wireless communication technologies, and in particular, to a control data transmission method, a network device, and a storage medium.
  • the quality of service (QoS) parameter includes the packet delay budget (PDB, Packet Delay), which indicates the transmission time between the user plane function (UPF, User plane function) and the user equipment (UE, User equipment). Delay.
  • PDB Packet Delay
  • the base station When the base station receives the QoS parameters, it will reduce the PDB value in the QoS parameters by a default value representing the core network transmission delay (the core network transmission delay is the transmission delay between the UPF and the base station), which will be reduced. The time obtained is used as the air interface transmission delay.
  • the default value indicating the transmission delay of the core network often cannot represent the actual transmission delay. For example, the transmission path is sometimes congested, sometimes idle, or the distance between different UPFs and base stations is different. Therefore, this method cannot be used to obtain accurate data. Air interface transmission delay.
  • the embodiments of the present application provide a control data transmission method, a network device, and a storage medium, which can accurately obtain an air interface transmission delay.
  • a method for controlling data transmission including: a first core network device sending first delay information to a first access network device, where the first delay information represents a time when data is transmitted on a first path;
  • the first path is a user plane data path between the second core network device and the first access network device.
  • a method for controlling data transmission including: a first access network device receiving first delay information from a first core network device; the first delay information including data transmitted on a first path; Uplink and / or downlink delay; the first path is a user plane data path between a second core network device and the first access network device; and the first access network device is based on the first
  • the delay information corresponding to the data flow in the path and the first delay information determine the second delay information; the delay information represents a delay in transmitting data between the second core network device and the terminal device;
  • the second delay information represents a delay in transmitting data between the first access network device and the terminal device.
  • a core network device configured to execute the method in the first aspect or the implementation manners thereof.
  • the core network device includes a function module for executing the method in the first aspect or the implementation manners thereof.
  • an access network device configured to execute the method in the foregoing second aspect or each implementation manner thereof.
  • the access network device includes a functional module for executing the method in the second aspect or the implementation manners thereof.
  • a device selection method including: a first core network device selecting a second core network device according to third delay information; the third delay information representing a delay in transmitting data on a second path;
  • the second path is a user plane data path between the second core network device and the first access network device, or the second path is a user plane data path between the second core network device and the terminal device.
  • a core network device configured to execute the method in the fifth aspect or each implementation manner thereof.
  • the core network device includes a functional module for executing the method in the foregoing fifth aspect or each implementation manner thereof.
  • a core network device including: a processor and a memory for storing a computer program capable of running on the processor, wherein when the processor is configured to run the computer program, execute the foregoing first Aspects or steps of the method in each of its implementations; or, performing the steps of the method in the above fifth aspect or its various implementations.
  • an access network device including: a processor and a memory for storing a computer program capable of running on the processor, wherein when the processor is used to run the computer program, the first section is executed. Steps of the method in the two aspects or their respective implementations.
  • a chip for implementing any one of the first aspect, the second aspect, or the fifth aspect or a method in an implementation manner thereof.
  • the chip includes a processor for invoking and running a computer program from the memory, so that the device installed with the chip executes any one of the first aspect, the second aspect, or the fifth aspect described above or each of the components. Method in implementation.
  • a computer-readable storage medium for storing a computer program that causes a computer to execute any one of the foregoing first aspect, or the second aspect, or the fifth aspect or an implementation thereof. method.
  • a computer program product including computer program instructions that cause a computer to execute the method in any one of the first aspect, the second aspect, or the fifth aspect described above or an implementation manner thereof.
  • a computer program that, when run on a computer, causes the computer to execute the method in any one of the first aspect, the second aspect, or the fifth aspect described above, or in various implementations thereof.
  • the first core network device sends the first access network device to the first access network device a first characterizing a time delay of a user plane data path between the second core network device and the first access network device.
  • a delay information so that the first access network device determines, based on the first delay information, second delay information that characterizes a data delay between the first access network device and the terminal device, thereby obtaining a closer to the actual situation
  • the air interface transmission delay that is, to obtain a more accurate air interface transmission schedule time, on the other hand can greatly improve the data transmission efficiency.
  • FIG. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a method for controlling data transmission according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a logical relationship of a communication system architecture to which a control data transmission method according to an embodiment of the present application is applied;
  • FIG. 4 is a schematic flowchart of another method for controlling data transmission according to an embodiment of the present application.
  • 5a to 5c are schematic diagrams of an application process of a method for controlling data transmission according to an embodiment of the present application
  • FIG. 6 is a schematic block diagram of a core network device according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of another core network device according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of an access network device according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a chip according to an embodiment of the present application.
  • GSM Global System for Mobile
  • CDMA Code Division Multiple Access
  • Wideband Code Division Multiple Access Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or a communication terminal or a terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located within the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • the network device may be a mobile switching center, relay station, access point, vehicle equipment, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in public land mobile networks (PLMN) that will evolve in the future.
  • PLMN public land mobile networks
  • the communication system 100 further includes at least one terminal device 120 located within a coverage area of the network device 110.
  • terminal equipment used herein includes, but is not limited to, connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection ; And / or another data connection / network; and / or via a wireless interface, such as for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and / or another terminal device configured to receive / transmit communication signals; and / or Internet of Things (IoT) devices.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • WLAN Wireless Local Area Networks
  • DVB-H Digital Video Broadband
  • satellite networks satellite networks
  • AM- FM broadcast transmitter AM- FM broadcast transmitter
  • IoT Internet of Things
  • a terminal device configured to communicate through a wireless interface may be referred to as a “wireless communication terminal”, a “wireless terminal”, or a “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular phones; personal communications systems (PCS) terminals that can combine cellular radiotelephones with data processing, facsimile, and data communications capabilities; can include radiotelephones, pagers, Internet / internal PDA with network access, web browser, notepad, calendar, and / or Global Positioning System (GPS) receiver; and conventional laptop and / or palm-type receivers or others including radiotelephone transceivers Electronic device.
  • PCS personal communications systems
  • GPS Global Positioning System
  • a terminal device can refer to an access terminal, user equipment (User Equipment), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or User device.
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Processing (PDA), and wireless communication.
  • terminal devices 120 may perform terminal direct device (D2D) communication.
  • D2D terminal direct device
  • the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like in this embodiment of the present application is not limited thereto.
  • network entities such as a network controller, a mobility management entity, and the like in this embodiment of the present application is not limited thereto.
  • the device having a communication function in the network / system in the embodiments of the present application may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobile management entity, and the like, which is not limited in the embodiments of the present application.
  • FIG. 2 is a schematic flowchart of a method for controlling data transmission according to an embodiment of the present application; as shown in FIG. 2, the method includes:
  • Step S11 the first core network device sends first delay information to the first access network device, where the first delay information represents a delay in transmitting data on the first path; the first path is the second core network A user plane data path between the device and the first access network device.
  • the first core network device may be any device in the core network.
  • the first core network device may be a Session Management Function (SMF) entity.
  • the first access network device may be any device in the access network.
  • the first access network device may be a base station, such as a gNB in a 5G system or an NR system.
  • the first delay information represents the transmission delay of the first path; the first path is a user plane data path between the second core network device and the first access network device.
  • the second core network device may be a UPF entity. If the first access network device is a base station, the first path is a data transmission path between the UPF entity and the base station.
  • the first delay information includes first uplink delay information and / or first downlink delay information of data transmitted on the first path. If the first path is a data transmission path between the UPF entity and the base station, the first uplink delay information is the transmission delay of data from the base station to the UPF entity, and the first downlink delay information is the data from the UPF entity to the base station. Transmission delay between base stations.
  • the method before the first core network device sends the first delay information to the first access network device, the method further includes: the first core network device determines the First delay information; the first delay information is determined according to at least one of the following information: location information of the second core network device, location information of the first access network device, the first path Network status, the data transmitted on the first path is uplink data or downlink data, the network slice identifier and / or Data Network Name (DNN) corresponding to the data transmitted on the first path, and the first Whether there is an intermediate second core network device and a subscription policy on the path; wherein the location information of the second core network device is determined based on the identifier of the second core network device and / or a data network access identifier (DNAI); the The location information of the first access network device is determined based on an identifier of the first access network device and / or a tracking area identifier or a registration area identifier to which the first access network device belongs.
  • DNN Data Network Name
  • the first delay information sent by the first core network device to the first access network device is specifically based on the position information of the network element node connected to the first path (including the position information of the second core network device and the And / or location information of the first access network device), the network status of the first path, the data type transmitted by the first path (the data type is specifically whether the data is an uplink data type or a downlink data type), At least one of the service characteristics corresponding to the data (specifically through network slice identification and / or DNN characterization), whether there is an intermediate second core network device in the first path, and the subscription policy of the end user is determined.
  • the location information of the network element node connected to the first path may specifically be the actual geographic location of the network element node.
  • the corresponding network element may be determined by the identifier of the network element node (the identifier of the second core network device and / or the identifier of the first access network device) in the obtained network element node information.
  • the actual geographic location of the node may specifically be the actual geographic location of the node.
  • the location of the second core network device may be determined through a data network access identifier (DNAI) of a data network (Data Network, DN) to which the second core network device is connected, and / or, The location of the first access network device is determined by using the obtained tracking area identifier or registration area identifier to which the first access network device belongs.
  • DNAI data network access identifier
  • DN data network
  • the location information of the network element node connected to the first path may also be the approximate location of the network element node.
  • the positions of other network element devices associated with the second core network device may be used as approximate positions of the second core network device, such as with The location of the DN connected to the second core network device is used as an approximate location; or the identifier of the DN (that is, DNAI) may be used as the identifier of the second core network device; or for the first access network device, the first The tracking area or registration area to which the access network device belongs is used as the approximate location of the first access network device. It can also be said that the tracking area identification or registration area identification is used as the identification of the first access network device.
  • the communication system architecture is a 5G system architecture, and may specifically include: UE, (wireless) interface Network element equipment such as network access ((R) AN), UPF, DN, access and mobility management function (AMF), SMF, UDM, AUSF, NSSF, PCF, AF; connection relationship from the figure From the above point of view, the UPF as the second core network device is connected to the DN. Therefore, in some embodiments, the position of the DN can be used as the approximate position of the second core network device, that is, the second DN identification (that is, DNAI) is used to determine the second position. Location of core network equipment.
  • the second DN identification that is, DNAI
  • the first core network device may pre-configure a mapping relationship set according to the foregoing information, that is, different information or information combinations correspond to a first delay information, and the first delay information may be determined based on experience or test results or Configuration; in actual applications, it can be implemented in the form of a pre-configured mapping relationship table.
  • Table 1 it is a schematic diagram of determining the first delay information based on the DNAI and the tracking area (or registration area) ID (TAI). Determine the first delay information.
  • the network status of the first path may be determined by determining whether a network status parameter meets a preset condition.
  • a first network status may be determined; when the network status parameter does not satisfy a preset condition, a second network status may be determined.
  • the first network status may be determined; when the network status parameter satisfies the second preset condition, the second network status may be determined; when the network status parameter is both When the first preset condition and the second preset condition parameter are not satisfied, the third network state may be determined.
  • the network status parameter may specifically be a transmission rate, and determining whether the network status parameter satisfies a preset condition may specifically be determined by determining whether the transmission rate exceeds a preset threshold; for example, when the transmission rate exceeds a first preset threshold, It is determined that the network status parameter satisfies a preset condition; when the transmission rate does not exceed the first preset threshold, it is determined that the network status parameter does not satisfy the preset condition.
  • the transmission rate exceeds a first preset threshold, it is determined that the network state parameter meets the first preset condition; when the transmission rate does not exceed the second preset threshold, it is determined that the network state parameter meets the second preset condition; When the transmission rate exceeds a second preset threshold and does not exceed the first preset threshold, it is determined that the network state parameter does not satisfy the first preset condition or the second preset condition parameter.
  • the first network state may be a network idle state
  • the second network state may be a network busy state (or may also be referred to as a network congestion state).
  • whether there is an intermediate second core network device on the first path (for example, whether there is an intermediate UPF entity in the first path); if there is an intermediate second core network device, data transmission is received by the intermediate second core network device. And it is issued that this process still takes time, so when determining the first delay information, it can be considered whether the first path has an intermediate second core network device.
  • the types of data transmitted on the first path are different types of uplink data or downlink data and correspondingly have different delays.
  • the network status of uplink data and downlink data is usually different.
  • the uplink data will have less or less congestion than the downlink data, and the delay corresponding to the uplink data will be less than the delay of the downlink data.
  • the network slice identifier corresponding to the data transmitted on the first path may be represented by (Single-Network Slice Selection Assistant Information (S-NSSAI) single network slice selection assistance information), and the S-NSSAI identifier and / or DNN may be used to represent services.
  • the service feature may represent a service feature requiring a delay; for example, if a data corresponds to a service feature requiring a low latency, the S-NSSAI identifier and / or DNN corresponding to the data may indicate that it is a low latency requirement Business.
  • the first core network device may pre-configure a mapping relationship set according to the foregoing information, that is, different information or information combinations correspond to a first delay information, and the first delay information may be determined based on experience or test results or Configuration; in actual applications, it can be implemented in the form of a pre-configured mapping relationship table.
  • the mapping relationship table may represent the network element devices connected to the same first path (including the location of the second core network device and the location of the first access network device), then the table reflects two kinds of information and the corresponding first Time-delay information, for example, a row in the table may indicate the network status of the first path, and a column may indicate the service characteristics corresponding to the data transmitted by the first path, that is, the table indicates the In a case where the location is at one location and the location of the first access network device is at another location, when the network state is in a certain state and the service characteristic corresponding to the transmitted data is in a certain characteristic, the first delay information corresponding to the first delay information.
  • the sending, by the first core network device, the first delay information to the first access network device includes: the first core network device sends the first delay information to the first access network device through the third core network device.
  • An access network device sends first delay information.
  • the first core network device is an SMF entity
  • the first access network device is a base station.
  • the SMF entity sends the first delay information to the base station through the AMF entity. It can be understood that the first core network device sends the first delay information to the first access network device through at least one third core network device.
  • the first core network device sending the first delay information to the first access network device includes at least one of the following: the first core network device uses a protocol data unit (Protocol Data Unit) sends a first delay message to a first access network device during a session establishment process; the first core network device sends a first delay message to the first access network device through a second message during a PDU session modification process.
  • the first time delay information is sent to the network; the first core network sends the first time delay information to the first access network through a third message in the network registration process of the terminal device; the first core network receives the first delay information through the terminal device.
  • the fourth message during the switching process of the incoming access network device sends the first delay information to the first access network.
  • the method for controlling data transmission in the embodiment of the present application may occur during a PDU session establishment process, a PDU session modification process, a terminal device network registration process, In at least one of the access network device switching processes, it can be understood that in the above process, the first core network device may send an arbitrary message to the first access network device with the first delay information; or, Any message sent by the first core network device to the first access network device through the third core network device carries the first delay information.
  • the method further includes: the first core network device selecting a second core network device according to the first delay information.
  • the first core network device may also select a first based on the first delay information Two core network equipment.
  • the selecting, by the first core network device according to the first delay information, a second core network device includes: the first core network device according to the first delay The information determines the location information of the second core network device to be selected, and selects the second core network device according to the location information of the selected second core network device.
  • the position range of the UPF may be determined based on the first delay information, that is, at least one UPF is determined, and then a UPF is selected from the determined at least one UPF. For example, the UPF closest to the base station may be selected from the determined at least one UPF.
  • the location information of the second core network to be selected is determined based on the DNAI and / or the identity of the second core network device.
  • the DNAI corresponding to at least one second core network device may be determined; A DNAI is selected from the determined DNAIs corresponding to at least one second core network device, and the selected DNAI is used as the second core network device.
  • the first delay information is determined based on the delay information and the second delay information; and the second delay information is characterized between the first access network device and all devices.
  • the time delay of data transmission between terminal devices is described; the time delay information represents the time delay of data transmission between the second core network device and the terminal device.
  • the delay information includes uplink delay information and / or downlink delay information of data transmitted between the second core network device and the terminal device; and / or, the second delay information includes Said second uplink delay information and / or second downlink delay information of data transmitted between the first access network device and the terminal device.
  • the first delay information is determined based on the delay information and the second delay information; the delay information may specifically be a PDB in a QoS parameter; the second delay information indicates an air interface delay; practical application
  • the first delay information can be obtained by subtracting the second delay information from the PDB.
  • the second delay information is obtained by the first core network device from the first access network device.
  • the first access network device estimates the second delay information. Sending the second delay information to the first core network device.
  • the first core network device selects the second core network device based on the third delay information, that is, selects the UPF entity based on the third delay information.
  • the first core network device may determine at least one of the following information according to the time extension short represented by the third delay information: the area range of the optional second core network device, and the optional second core network device.
  • the network status of the corresponding path whether the path corresponding to the optional second core network device supports the existence of an intermediate second core network device, the network slice identifier corresponding to the data transmitted by the path corresponding to the optional second core network device, and / Or DNN, the data transmitted through the path corresponding to the optional second core network device is uplink data or downlink data; and the second core network device is selected based on the determined above information.
  • the delay represented by the third delay information is short, it may be determined that the position of the optional second core network device is closer to the first access network device, or the optional second core network device may be determined
  • the path corresponding to the device has a weak congestion state (that is, the network status is relatively idle), or it can be determined that the path corresponding to the optional second core network device does not support the existence of an intermediate second core network device, or the optional second core network device can be determined
  • the data transmitted on the path corresponding to the core network device corresponds to the network slice identifier and / or the DNN indicates that the transmitted data is data required for low latency, or it can be determined that the data transmitted on the path corresponding to the optional second core network device is uplink data and many more.
  • the first core network device sends the first access network device to the first access network device a first characterizing a time delay of a user plane data path between the second core network device and the first access network device.
  • a delay information so that the first access network device determines, based on the first delay information, second delay information that characterizes a data delay between the first access network device and the terminal device, thereby obtaining a closer to the actual situation
  • the air interface transmission delay that is, to obtain a more accurate air interface transmission schedule time, on the other hand can greatly improve the data transmission efficiency.
  • FIG. 4 is a schematic flowchart of another method for controlling data transmission according to an embodiment of the present application; as shown in FIG. 4, the method includes:
  • Step S21 the first access network device receives first delay information from the first core network device; the first delay information includes a delay in transmitting data on a first path; and the first path is a second core A user plane data path between the network device and the first access network device;
  • Step S22 the first access network device determines second delay information according to the delay information corresponding to the data flow in the first path and the first delay information; the delay information is characterized in the A time delay for transmitting data between the second core network device and the terminal device; the second delay information characterizes a time delay for transmitting data between the first access network device and the terminal device.
  • the first access network device may be any device in the access network.
  • the first access network device may be a base station, such as a gNB in a 5G system or an NR system.
  • the first core network device may be any device in the core network.
  • the first core network device may be an SMF entity.
  • the first delay information represents the transmission delay of the first path; the first path is a user plane data path between the second core network device and the first access network device.
  • the second core network device may be a UPF entity. If the first access network device is a base station, the first path is a data transmission path between the UPF entity and the base station.
  • the first delay information includes first uplink delay information and / or first downlink delay information of data transmitted on the first path. If the first path is a data transmission path between the UPF entity and the base station, the first uplink delay information is the transmission delay of data from the base station to the UPF entity, and the first downlink delay information is the data from the UPF entity to the base station. Transmission delay between base stations.
  • the first delay information is determined according to at least one of the following information: location information of the second core network device, and location information of the first access network device ,
  • the network status of the first path, the data transmitted by the first path is uplink data or downlink data, the network slice identifier and / or DNN corresponding to the data transmitted by the first path, and whether the first path exists Intermediate second core network equipment and contract strategy.
  • the location information of the second core network device is determined based on the identifier and / or DNAI of the second core network device; the location information of the first access network device is based on The identifier of the first access network device and / or the tracking area identifier or the registration area identifier to which the first access network device belongs is determined.
  • the position information of the second core network device may be represented by the approximate position of the second core network device, and the positions of other network element devices associated with the second core network device may be used as the approximate positions of the second core network device.
  • the location of the DN connected to the second core network device is used as an approximate location
  • the identifier of the DN that is, DNAI
  • the location information of the first access network device can be represented by the approximate location of the first access network device.
  • the tracking area or registration area to which the first access network device belongs is used as the approximate location of the first access network device. Use the tracking area identifier or the registration area identifier as the identifier of the first access network device.
  • the first delay information is determined based on the delay information and the second delay information.
  • the delay information may specifically be a PDB in a QoS parameter; the second delay information indicates an air interface delay; in practical applications, the first delay information may be obtained by subtracting the second delay information from the PDB.
  • the method further includes: the first access network device sends the second delay information to the first core network device, so that the first core device The network equipment section determines the first delay information based on the second delay information.
  • the delay information includes uplink delay information and / or downlink delay information for transmitting data between the second core network device and a terminal device; and / or, the second delay information Including second uplink delay information and / or second downlink delay information for transmitting data between the first access network device and the terminal device.
  • the delay information may specifically be a PDB in a QoS parameter; at least one PDU session may be established for each terminal device; each PDU session may have multiple QoS flows (the QoS flow) It can be understood as the data flow in the embodiment of the present application), each QoS flow corresponds to a QoS parameter, that is, in this embodiment, the first access network according to the PDB corresponding to the data flow in the first path and the received first time
  • the second delay information is determined by the delay information, and the second delay information represents a delay of data transmission between the first access network device and the terminal device, that is, the second delay information indicates Air interface delay.
  • the second delay information can be obtained by subtracting the first delay information from the PDB.
  • the second uplink delay information is obtained by subtracting the first uplink delay information from the uplink delay information
  • the second downlink delay information is obtained by subtracting the second uplink delay information from the downlink delay information.
  • the method further includes: the first access network device sends the second delay information to the terminal device; or the first access network device Sending the second uplink delay information to the terminal device.
  • the first access network device sends the second delay information (including the second uplink delay information and / or the second downlink delay information) to the terminal device, so that the terminal device according to the second delay information Schedule uplink data; or the first access network sends only the second uplink delay information to the terminal device, so that the terminal device schedules the uplink data according to the second uplink delay information.
  • the method further includes: the first access network device determines a scheduling policy according to the second delay information, and sends the scheduling policy to the terminal device.
  • the first access network does not send the second delay information to the terminal device, but determines the scheduling policy according to the second delay information, and sends the scheduling policy to the terminal device, so that the terminal device performs the scheduling.
  • Strategy for uplink data transmission The scheduling policy enables the terminal device to perform transmission of uplink data and / or downlink data at a specific time point and / or time interval; wherein the time point may be a subframe symbol definition based on a specific radio frame.
  • the first access network device may choose to send the second delay information (or the second uplink delay information) to the terminal device or send a scheduling policy according to the actual situation of the network and / or the capabilities of the terminal.
  • the first access network device if the first access network device does not receive the first delay information from the first core network device, the first access network device is based on the The delay information corresponding to the data stream and the pre-configured default delay information determine the second delay information.
  • the default delay information is a pre-configured delay of data transmission on the first path, and the default delay information is, for example, 1 ms, 2 ms, 10 ms, and so on.
  • the second delay information may be obtained by subtracting the default delay information from the delay information.
  • the first core network device sends the first access network device to the first access network device a first characterizing a time delay of a user plane data path between the second core network device and the first access network device.
  • a delay information so that the first access network device determines, based on the first delay information, second delay information that characterizes a data delay between the first access network device and the terminal device, thereby obtaining a closer to the actual situation
  • the air interface transmission delay that is, to obtain a more accurate air interface transmission schedule time, on the other hand can greatly improve the data transmission efficiency.
  • FIG. 5a to 5c are schematic application flow diagrams of a control data transmission method according to an embodiment of the present application; wherein, FIG. 5a shows that the control data transmission according to the embodiment of the present application is applied to a PDU session establishment process; as shown in FIG.
  • Step 101 The UE initiates a PDU session establishment request (PDU Session Establishment Request) to the AMF.
  • PDU Session Establishment Request PDU Session Establishment Request
  • Step 102 the AMF performs SMF selection (SMF selection);
  • Step 103 the AMF initiates an uplink and downlink request (Nsmf_PDU Session_Create SMContext Request) to the SMF;
  • Step 104a-b Perform update / subscription retrieval / subscription (Registration / Subscription retrieval / Subscription for updates) between the SMF and the UDM;
  • Step 105 the SMF sends a context response (Nsmf_PDU Session_Create SMContext Response) to the AMF;
  • Step 106 Perform PDU session authentication / authorization.
  • Steps 107a-b The SMF performs PCF selection (PCF selection), and the SMF and PCF perform policy association establishment or policy association modification (SM Policy, Establishment, SMF, Initialization, SM, Policy, and Modification);
  • PCF selection PCF selection
  • SM Policy Policy, Establishment
  • SMF Policy, Initialization
  • SM Policy, Policy, and Modification
  • Step 108 the SMF performs UPF selection (UPF selection).
  • Step 109 the SMF initiates the SM policy association modification (SMF initiated Policy Modification);
  • Steps 110a-b the SMF sends an N4 session establishment / modification request (N4Session Establishment / Modification Request) to the UPF; the UPF sends an N4 session establishment / modification response (N4Session Establishment / Modification Response) to the SMF;
  • Step 111 The SMF transmits a message (Namf_Communication_N1N2 Message Transfer) to the AMF, and the message carries the first delay information.
  • Step 112 The AMF sends a PDU session request (N2, PDU, Session Request) to the access network (such as a base station), where the PDU session request carries the first delay information; the access network is based on the first delay message and the QoS parameter PDB in the server determines the second delay information;
  • N2 PDU session request
  • PDU session request carries the first delay information
  • the access network is based on the first delay message and the QoS parameter PDB in the server determines the second delay information
  • Step 113 The access network sends a resource setup message (AN-specific resource setup) to the UE, where the resource setup message carries the second delay information;
  • Step 114 The access network sends a PDU session request acknowledgement (N2 PDU Session Request Ack) to the AMF. So far, the first uplink data (First Uplink Data) is transmitted between the UE and the UPF;
  • Step 115 the AMF sends a context request (Nsmf_PDU Session_Update SMContext Request) to the SMF;
  • Steps 116a-b the SMF sends a session modification request (N4Session Modification Request) to the UPF, and the UPF sends a session modification response (N4Session Modification Response) to the SMF.
  • N4Session Modification Request a session modification request
  • N4Session Modification Response a session modification response
  • Step 117 the SMF sends a context response (Nsmf_PDU Session_Update SMContext Response) to the AMF;
  • Step 118 the SMF sends a context status notification (Nsmf_PDU Session_Update SMContextStatusNotify) to the AMF;
  • Step 119 the SMF sends an IPv6 address configuration message (IPv6Address Configuration) to the UE;
  • IPv6Address Configuration IPv6Address Configuration
  • Step 120 Perform unsubscription / deregistration between the SMF and the UDM.
  • FIG. 5b shows that the control data transmission in the embodiment of the present application is applied to a PDU session modification process, such as a network state change, a path change, and the like. As shown in Figure 5b, it includes:
  • Step 201a the UE sends a PDU session modification request (PDU Session Modification Request) to the AMF, and the AMF sends a PDU session update SM context (Nsmf_PDU Session_Update SMContext) to the SMF;
  • PDU Session Modification Request PDU Session Modification Request
  • Nsmf_PDU Session_Update SMContext PDU session update SM context
  • a delay update identifier may be carried in the PDU session modification request; correspondingly, the delay update identifier may be carried in the PDU session update SM context; in this scenario, the UE triggers the update of the first delay information;
  • Steps 201b-d The SMF executes PCF to initiate SM policy association modification (PCF) based on the update of the PDU session, and notifies UDM (Nudm_SDM_Notification); in this scenario, SMF triggers the update of the first delay information;
  • PCF policy association modification
  • Step 201e the access network (RAN) sends an N2 message (N2Message) to the AMF, where the N2 message carries a PDU session identifier (PDU session ID) and SM information (SM information), and the AMF sends a PDU session to the SMF to update the SM context ( Nsmf_PDU Session_Update SMContext);
  • N2Message N2 message
  • PDU session ID PDU session identifier
  • SM information SM information
  • Step 202 the SMF initiates SM policy association modification (SMF initiated Policy Modification);
  • Steps 203a-b the SMF sends a PDU session update SM context response (Response of Nsmf_PDU Session_Update SMContext) to the AMF; the SMF transmits a message (Namf_Communication_N1N2 Message Transfer) to the AMF, and the message carries the first delay information;
  • Step 204 The AMF sends an N2 session request (N2, PDU, Session Request) to the access network, and the request carries the first delay information; the access network determines the second delay based on the first delay message and the PDB in the QoS parameters. information;
  • N2 session request N2, PDU, Session Request
  • Step 205 The access network sends a resource modification message (AN-specific resource modification) to the UE, and the message carries the second delay information;
  • Step 206 the access network sends an N2 session response (N2 Session Response) to the AMF;
  • Step 207a-b the AMF sends a PDU session update SM context request (Nsmf_PDU Session_Update SMContext Request) to the SMF; the SMF sends a PDU session update SM context response (Nsmf_PDU Session_Update SMContext Response) to the AMF;
  • Steps 208a-b the SMF sends an N4 Session Modification Request to the UPF; the UPF sends an N4 Session Modification Response to the SMF;
  • Step 209 the UE sends a PDU Session Modification Command Ack message to the access network;
  • Step 210 The access network sends N2 NAS uplink transmission (N2 NAS uplink) to the AMF;
  • Steps 211a-b the AMF sends a PDU session update SM context request (Nsmf_PDU Session_Update SMContext Request) to the SMF; the SMF sends a PDU session update SM context response (Nsmf_PDU Session_Update SMContext Response) to the AMF;
  • Steps 212a-b the SMF sends a Session Modification Request to the UPF; the UPF sends a Session Modification Response to the SMF;
  • Step 213 The SMF initiates the SM policy association modification (SMF initiated Policy Modification).
  • FIG. 5c shows the registration process of the control data transmission applied to the terminal device according to the embodiment of the present application, such as the registration update process, the terminal device in the idle state (IDLE state) is migrated from EPS to 5GS, etc .; in this example, the update may be included The old AMF (OLD AMF) before (or before switching or before migration); and the new AMF (NEW AMF) including after updating (or after switching or after migration). As shown in Figure 5c, it includes:
  • Step 301 the UE initiates a Registration Request to the access network
  • Step 302 the access network performs AMF selection (AMF selection);
  • Step 303 the access network sends a Registration Request to the new AMF
  • Step 304-Step 305 The new AMF sends a context transmission (Nsmf_Communication_UEContextTransfer) to the old AMF; the old AMF sends a context transmission response (Nsmf_Communication_UEContextTransferResponse) to the new AMF;
  • Step 306-Step 307 The new AMF sends an identity request (Identity Request) to the UE, and the UE sends an identity response (Identity Response) to the new AMF;
  • Step 308 The new AMF performs AUSF selection.
  • Step 309 Perform an authentication / security process.
  • Step 310 transmitting a registration completion notification (Nsmf_Communication_RegistrationCompleteNotify) between the new AMF and the old AMF;
  • Step 311 transmitting an identification request and an identification response (Identity Request / Response) between the UE and the new AMF;
  • Step 312 Transmission equipment identity check (N5g-EIR_EquipmentIdentityCheck_Get) between the new AMF and the EIR;
  • Step 313 the new AMF performs UDM selection (UDM selection);
  • Step 314 Perform registration (Nudm_UECM_Registration), obtain (Nudm_SDM_Get), subscribe (Nudm_SDM_Subscribe), cancel registration (Nudm_UCM_DeregistrationNotify), and cancel subscription (Nudm_SDM_Unsubscribe) between the new AMF and UDM;
  • Step 315 the new AMF performs PCF selection (PCF selection);
  • Step 316 Establish a policy association during the registration process between the new AMF implementation and the PCF (AM Policy, Establishment, Registration);
  • Step 317 transmitting a PDU session update SM context (Nsmf_PDU Session_Update SMContext) between the SMF and the new AMF, and a PDU session release SM context (Nsmf_PDU Session_Release SMContext); wherein the message sent by the SMF to the new AMF carries the first delay information;
  • a PDU session update SM context Nsmf_PDU Session_Update SMContext
  • Nsmf_PDU Session_Release SMContext a PDU session release SM context
  • Steps 318 to 319 The new AMF sends an N2 AMF modification request (N2 AMF Mobility Request) to the N3IWF; the N3IWF sends an N2 AMF modification response (N2 AMF Mobility Response) to the new AMF;
  • N2 AMF Mobility Request N2 AMF modification request
  • N2 AMF Mobility Response N2 AMF Mobility Response
  • Step 320 transmitting AMF between the PCF and the old AMF and initiating AM policy association termination (AMF-Initiated AM Policy Policy Termination);
  • Steps 321 to 322 The new AMF sends a Registration Accept to the UE; the UE sends a Registration Complete to the new AMF.
  • FIG. 6 is a schematic block diagram of a core network device according to an embodiment of the present application.
  • the core network device includes a first communication unit 41 configured to send a first to a first access network device.
  • Delay information where the first delay information represents a delay in transmitting data on a first path; the first path is a user plane data path between a second core network device and the first access network device.
  • the first delay information includes first uplink delay information and / or first downlink delay information of data transmitted on the first path.
  • the core network device further includes a first processing unit 42 configured to send the first communication unit 41 to the first access network device.
  • the first delay information is determined according to at least one of the following information: location information of the second core network device, and information of the first access network device. Location information, registration area identifier corresponding to the first access network device, network status of the first path, data transmitted on the first path is uplink data or downlink data, and data transmitted on the first path corresponds to The network slice identification and / or DNN, whether there is an intermediate second core network device on the first path, and a subscription policy.
  • the location information of the second core network device is determined based on the identifier and / or DNAI of the second core network device; the location information of the first access network device is based on the first access network device And the identification of the tracking area identification or the registration area identification to which the first access network device belongs.
  • the first communication unit 41 is configured to send the first delay information to the first access network device by at least one of the following methods: A message sends the first delay information to the first access network device; the first delay information is sent to the first access network through the second message in the PDU session modification process; the third information is sent through the third device during the network registration process of the terminal device.
  • the message sends the first delay information to the first access network; the fourth message during the handover process of the access network device accessed by the terminal device sends the first delay information to the first access network.
  • the first communication unit 41 is configured to send the first delay information to the first access network device through the third core network device.
  • the first processing unit 42 is further configured to select a second core network device according to the first delay information.
  • the first processing unit 42 is configured to determine location information of a second core network device to be selected according to the first delay information, and according to the selected second For the location information of the core network device, a second core network device is selected.
  • the location information of the second core network to be selected is determined based on the DNAI and / or the identity of the second core network device.
  • the first delay information is determined based on the delay information and the second delay information; and the second delay information is characterized between the first access network device and all devices.
  • the time delay of data transmission between terminal devices is described; the time delay information represents the time delay of data transmission between the second core network device and the terminal device.
  • the delay information includes uplink delay information and / or downlink delay information for transmitting data between the second core network device and a terminal device; and / or,
  • the second delay information includes second uplink delay information and / or second downlink delay information for transmitting data between the first access network device and the terminal device.
  • the first communication unit 41 is further configured to obtain the second delay information from the first access network device.
  • FIG. 8 is a schematic block diagram of an access network device according to an embodiment of the present application; as shown in FIG. 8, the access network device includes a second communication unit 51 and a second processing unit 52;
  • the second communication unit 51 is configured to receive first delay information from a first core network device; the first delay information includes a delay in transmitting data on a first path; and the first path is a second A user plane data path between the core network device and the first access network device;
  • the second processing unit 52 is configured to determine the second delay information according to the delay information corresponding to the data flow in the first path and the first delay information received by the second communication unit 51;
  • the delay information characterizes a delay in transmitting data between the second core network device and the terminal device;
  • the second delay information characterizes data in transmitting between the first access network device and the terminal device Delay.
  • the first delay information includes first uplink delay information and / or first downlink delay information of data transmitted on the first path.
  • the delay information includes uplink delay information and / or downlink delay information for transmitting data between the second core network device and a terminal device; and / or,
  • the second delay information includes second uplink delay information and / or second downlink delay information for transmitting data between the first access network device and the terminal device.
  • the second communication unit 51 is further configured to send the second delay information to the terminal device; or send the second uplink delay information to the terminal device. Mentioned terminal equipment.
  • the second processing unit 52 is further configured to determine a scheduling policy according to the second delay information
  • the second communication unit 51 is further configured to send the scheduling policy determined by the second processing unit 52 to the terminal device.
  • the scheduling policy is used to enable the terminal device to perform transmission of uplink data and / or downlink data at a specific time point and / or time interval; wherein the time point may be a sub-frame based on a specific radio frame. Frame symbol definition.
  • the first delay information is determined based on the delay information and the second delay information.
  • the second communication unit 51 is further configured to send the second delay information to the first core network device.
  • An embodiment of the present application further provides a device selection method, where the method includes:
  • Step S31 the first core network device selects the second core network device according to the third delay information; the third delay information represents a delay in transmitting data on the second path; and the second path is the second core network device A user plane data path with the first access network device, or the second path is a user plane data path between the second core network device and the terminal device.
  • the first core network device may be any device in the core network.
  • the first core network device may be an SMF entity.
  • the first access network device may be any device in the access network.
  • the first access network device may be a base station, such as a gNB in a 5G system or an NR system.
  • the third delay information represents the transmission delay of the second path;
  • the second path may be a user plane data path between the second core network device and the first access network device, or the second core network device and the terminal User plane data path between devices.
  • the second core network device may be a UPF entity
  • the second path may be a data transmission path between the UPF entity and the base station, or a data transmission path between the UPF entity and the terminal device (that is, the terminal).
  • the third delay information includes third uplink delay information and / or third downlink delay information of data transmitted on the second path.
  • the selecting, by the first core network device according to the third delay information, a second core network device includes: the first core network device according to the third delay The information determines the location information of the second core network device to be selected, and selects the second core network device according to the location information of the selected second core network device.
  • the position range of the UPF may be determined based on the first delay information, that is, at least one UPF is determined, and then a UPF is selected from the determined at least one UPF. For example, the UPF closest to the base station may be selected from the determined at least one UPF.
  • the location information of the second core network to be selected is determined based on the DNAI and / or the identity of the second core network device.
  • setting the first delay information in Table 1 is the third delay information in this embodiment.
  • the third delay information and the first access network device are known when the third delay information is known.
  • the DNAI corresponding to at least one second core network device can be determined; a DNAI is selected from the determined DNAI corresponding to at least one second core network device, and the selected DNAI is used as the second Core network equipment.
  • the third delay information is determined based on the second delay information; the second delay information is characterized between the first access network device and the terminal device. Data transmission delay.
  • the second delay information includes second uplink delay information and / or second downlink delay information for transmitting data between the first access network device and the terminal device.
  • the third delay information is determined based on the delay information and the second delay information; the delay information may specifically be a PDB in a QoS parameter; the second delay information indicates an air interface delay; practical application
  • the third delay information can be obtained by subtracting the second delay information from the PDB.
  • the second delay information is obtained by the first core network device from the first access network device; as an example, the first access network device Estimate the second delay information, and send the second delay information to the first core network device.
  • the first core network device selects the second core network device based on the third delay information, that is, selects the UPF entity based on the third delay information.
  • the first core network device may determine at least one of the following information according to the time extension short represented by the third delay information: the area range of the optional second core network device, and the optional second core network device.
  • the network status of the corresponding path whether the path corresponding to the optional second core network device supports the existence of an intermediate second core network device, the network slice identifier corresponding to the data transmitted by the path corresponding to the optional second core network device, and / Or DNN, the data transmitted through the path corresponding to the optional second core network device is uplink data or downlink data; and the second core network device is selected based on the determined above information.
  • the delay represented by the third delay information is short, it may be determined that the position of the optional second core network device is closer to the first access network device, or the optional second core network device may be determined
  • the path corresponding to the device has a weak congestion state (that is, the network status is relatively idle), or it can be determined that the path corresponding to the optional second core network device does not support the existence of an intermediate second core network device, or the optional second core network device can be determined
  • the data transmitted on the path corresponding to the core network device corresponds to the network slice identifier and / or the DNN indicates that the transmitted data is data required for low latency, or it can be determined that the data transmitted on the path corresponding to the optional second core network device is uplink data and many more.
  • the range of the UPF may be determined based on the third delay information, that is, at least one UPF is determined, and then a UPF is selected from the determined at least one UPF. For example, the UPF closest to the base station may be selected from the determined at least one UPF.
  • the method before the first core network device selects the second core network device according to the third delay information, the method further includes: determining by the first core network device according to the subscription information The third delay information; wherein the first core network device is configured with the subscription information in advance; or the first core network device obtains the subscription information from other core network devices.
  • the third delay information determined based on the contract information indicates the data transmission delay allowed by the second path, that is, the data transmission allowed between the second core network device and the first access network device. Or the data transmission delay between the second core network device and the terminal device.
  • An embodiment of the present application further provides a core network device, where the core network device is a first core network device; the core network device includes a selection unit configured to select a second core network device according to the third delay information;
  • the third delay information represents a delay in transmitting data on a second path; the second path is a user plane data path between the second core network device and the first access network device, or the second path It is a user plane data path between the second core network device and the terminal device.
  • the third delay information includes third uplink delay information and / or third downlink delay information of data transmitted on the second path.
  • the core network device further includes a determining unit configured to determine the third core network device according to the contract information before the selecting unit selects the second core network device according to the third delay information. Delay information.
  • the selection unit is configured to determine location information of a second core network device to be selected according to the third delay information, and according to the selected second core network device For the location information, select the second core network device.
  • the location information of the second core network to be selected is determined based on the DNAI and / or the identity of the second core network device.
  • the third delay information is determined based on the second delay information; the second delay information is characterized between the first access network device and the terminal device. Data transmission delay.
  • the second delay information includes second uplink delay information and / or second downlink delay information for transmitting data between the first access network device and the terminal device.
  • the core network device further includes a third communication unit configured to obtain the second delay information from the first access network device.
  • FIG. 9 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the present application.
  • the communication device 600 shown in FIG. 9 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 600 may further include a memory 620.
  • the processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of antennas may be one or more.
  • the communication device 600 may specifically be a core network device in the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the core network device in each control data transmission method or device selection method in the embodiments of the present application.
  • the communication device 600 may specifically be an access network device according to the embodiment of the present application, and the communication device 600 may implement a corresponding process implemented by the access network device in each method of the embodiment of the present application. For simplicity, in This will not be repeated here.
  • FIG. 10 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in FIG. 10 includes a processor 710, and the processor 710 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720.
  • the processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.
  • the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
  • the chip 700 may further include an input interface 730.
  • the processor 710 may control the input interface 730 to communicate with other devices or chips. Specifically, the processor 710 may obtain information or data sent by the other devices or chips.
  • the chip 700 may further include an output interface 740.
  • the processor 710 may control the output interface 740 to communicate with other devices or chips. Specifically, the processor 710 may output information or data to the other devices or chips.
  • the chip can be applied to the core network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the core network device in each control data transmission method or device selection method in the embodiments of the present application, for simplicity , Will not repeat them here.
  • the chip can be applied to the access network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the access network device in each method of the embodiment of the present application. To repeat.
  • the chip mentioned in the embodiments of the present application may also be referred to as a system-level chip, a system chip, a chip system or a system-on-chip.
  • the processor in the embodiment of the present application may be an integrated circuit chip and has a signal processing capability.
  • each step of the foregoing method embodiment may be completed by using an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the above processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (Field, Programmable Gate Array, FPGA), or other Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present application may be directly implemented by a hardware decoding processor, or may be performed by using a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the foregoing method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), and an electronic memory. Erase programmable read-only memory (EPROM, EEPROM) or flash memory.
  • the volatile memory may be Random Access Memory (RAM), which is used as an external cache.
  • RAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchronous DRAM Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM Enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory Synchrobus RAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (Double SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct RAMbus RAM, DR RAM) and so on. That is, the memories in the embodiments of the present application are intended to include, but not limited to, these and any other suitable types of memories.
  • An embodiment of the present application further provides a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the core network device in the embodiments of the present application, and the computer program enables the computer to implement each control data transmission method or device selection method in the embodiments of the present application by the core network device.
  • the corresponding processes are not repeated here for brevity.
  • the computer-readable storage medium may be applied to an access network device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding process implemented by the access network device in each method in the embodiment of the present application. Concise, I won't repeat them here.
  • An embodiment of the present application further provides a computer program product, including computer program instructions.
  • the computer program product can be applied to a core network device in the embodiments of the present application, and the computer program instructions cause a computer to execute the control data transmission method or the device selection method implemented by the core network device in the embodiments of the present application.
  • the corresponding process is omitted here for brevity.
  • the computer program product can be applied to an access network device in the embodiments of the present application, and the computer program instructions cause a computer to execute a corresponding process implemented by the access network device in each method in the embodiments of the present application, for the sake of simplicity , Will not repeat them here.
  • the embodiment of the present application also provides a computer program.
  • the computer program may be applied to a core network device in the embodiment of the present application.
  • the computer program When the computer program is run on a computer, the computer is caused to execute the control data transmission method or the device selection method in the embodiment of the application.
  • the corresponding processes implemented by network equipment are not repeated here for brevity.
  • the computer program may be applied to an access network device in the embodiment of the present application, and when the computer program is run on a computer, the computer is caused to execute a corresponding method implemented by the access network device in each method in the embodiment of the present application. For the sake of brevity, we will not repeat them here.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory) ROM, random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes .

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Abstract

本申请实施例公开了一种控制数据传输方法、网络设备和存储介质。所述方法包括：第一核心网设备向第一接入网设备发送第一时延信息，所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。

Description

一种控制数据传输方法、网络设备和存储介质 技术领域
本发明涉及无线通信技术，具体涉及一种控制数据传输方法、网络设备和存储介质。
背景技术
服务质量(QoS，Quality of Service)参数中包含数据包时延预算(PDB，Packet Delay Budget)，表示用户面功能(UPF，User plane Function)与用户设备(UE，User Equipment)之间的传输时延。为了空口调度，基站接收到QoS参数时，将QoS参数中的PDB值减去一个表示核心网传输时延(核心网传输时延为UPF与基站之间的传输时延)的默认值，将减去获得的时间作为空口传输时延。然而，表示核心网传输时延的默认值往往不能表示实际传输时延，比如传输路径有时拥塞，有时空闲，或者不同的UPF与基站之间的距离也不同，因此，采用这种方式无法得到准确的空口传输时延。
发明内容
本申请实施例提供一种控制数据传输方法、网络设备和存储介质，能够准确得到空口传输时延。
第一方面，提供了一种控制数据传输方法，包括：第一核心网设备向第一接入网设备发送第一时延信息，所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。
第二方面，提供了一种控制数据传输方法，包括：第一接入网设备接收来自第一核心网设备的第一时延信息；所述第一时延信息包括在第一路径传输数据的上行和/或下行的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径；所述第一接入网设备根据所述第一路径中的数据流对应的时延信息和所述第一时延信息确定第二时延信息；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
第三方面，提供了一种核心网设备，用于执行上述第一方面或其各实现方式中的方法。具体地，该核心网设备包括用于执行上述第一方面或其各实现方式中的方法的功能模块。
第四方面，提供了一种接入网设备，用于执行上述第二方面或其各实现方式中的方法。具体地，该接入网设备包括用于执行上述第二方面或其各实现方式中的方法的功能模块。
第五方面，提供了一种设备选择方法，包括：第一核心网设备根据第三时延信息选择第二核心网设备；所述第三时延信息表征在第二路径传输数据的时延；所述第二路径为第二核心网设备与第一接入网设备之间的用户面数据路径，或者，所述第二路径为第二核心网设备与终端设备之间的用户面数据路径。
第六方面，提供了一种核心网设备，用于执行上述第五方面或其各实现方式中的方法。具体地，该核心网设备包括用于执行上述第五方面或其各实现方式中的方法的功能模块。
第七方面，提供了一种核心网设备，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述第一方面或其各实现方式中的方法的步骤；或者，执行上述第五方面或其各实现方式中的方法的步骤。
第八方面，提供了一种接入网设备，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行上述第二方面或其各实现方式中的方法的步骤。
第九方面，提供了一种芯片，用于实现上述第一方面或第二方面或第五方面中的任一方面或其各实现方式中的方法。具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行如上述第一方面或第二方面或第五方面中的任一方面或其各实现方式中的方法。
第十方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面或第二方面或第五方面中的任一方面或其各实现方式中的方法。
第十一方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述第一方面或第二方面或第五方面中的任一方面或其各实现方式中的方法。
第十二方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面或第二方面或第五方面中的任一方面或其各实现方式中的方法。
通过本申请实施例的技术方案，通过第一核心网设备向第一接入网设备发送表征第二核心网设备与所述第一接入网设备之间的用户面数据路径的时延的第一时延信息，使得第一接入网设备基于该第一时延信息确定表征第一接入网设备与终端设备之间传输数据时延的第二时延信息，从而得到更接近实际情况的空口传输时延，也即得到更为准确的空口传输可调度时间，从另一方面可大大提高数据的传输效率。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图；
图2是本申请实施例提供的一种控制数据传输方法的流程示意图；
图3是本申请实施例提供的控制数据传输方法所应用的通信系统架构的逻辑关系示意图；
图4是本申请实施例提供的另一种控制数据传输方法的流程示意图；
图5a至图5c是本申请实施例提供的控制数据传输方法的应用流程示意图；
图6是本申请实施例提供的一种核心网设备的示意性框图；
图7是本申请实施例提供的另一种核心网设备的示意性框图；
图8是本申请实施例提供的一种接入网设备的示意性框图；
图9是本申请实施例提供的一种通信设备的硬件结构示意图；
图10是本申请实施例提供的一种芯片的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统或5G系统等。
示例性的，本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的终端设备进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个终端设备120。作为在此使用的“终端设备”包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接/网络；和/或经由无线接口，如，针对蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器；和/或另一终端设备的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信的终端设备可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话；可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信系 统(Personal Communications System，PCS)终端；可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位系统(Global Positioning System，GPS)接收器的PDA；以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端设备可以指接入终端、用户设备(User Equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、5G网络中的终端设备或者未来演进的PLMN中的终端设备等。
可选地，终端设备120之间可以进行终端直连(Device to Device，D2D)通信。
可选地，5G系统或5G网络还可以称为新无线(New Radio，NR)系统或NR网络。
图1示例性地示出了一个网络设备和两个终端设备，可选地，该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。
可选地，该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体，本申请实施例对此不作限定。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例，通信设备可包括具有通信功能的网络设备110和终端设备120，网络设备110和终端设备120可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统100中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本申请实施例提供了一种控制数据传输方法。图2是本申请实施例提供的一种控制数据传输方法的流程示意图；如图2所示，所述方法包括：
步骤S11：第一核心网设备向第一接入网设备发送第一时延信息，所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。
本实施例中，第一核心网设备可以是核心网中的任一设备，作为一种实施方式，第一核心网设备可以是会话管理功能(Session Management Function，SMF)实体。第一接入网设备可以是接入网中的任一设备，作为一种实施方式，第一接入网设备可以是基站，例如5G系统或NR系统中的gNB。
本实施例中，第一时延信息表征第一路径的传输时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。作为一种实施方式，所述第二核心网设备可以是UPF实体，若第一接入网设备为基站，则第一路径为UPF实体至基站之间的数据传输路径。
本实施例中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。若第一路径为UPF实体至基站之间的数据传输路径，则第一上行时延信息为数据由基站至UPF实体之间的传输时延，第一下行时延信息为数据由UPF实体至基站之间的传输时延。
在本申请的一种可选实施例中，所述第一核心网设备向第一接入网设备发送第一时延信息之前，所述方法还包括：所述第一核心网设备确定所述第一时延信息；所述第一时延信息根据以下信息的至少之一确定：所述第二核心网设备的位置信息、所述第一接入网设备的位置信息、所述第一路径的网络状态、所述第一路径传输的数据是上行数据或下行数据、所述第一路径传输的数据对应的网络切片标识和/或数据网络名(Data Network Name，DNN)、所述第一路径是否存在中间第二核心网设备、签约策略；其中，所述第二核心网设备的位置信息基于所述第二核心网设备的标识和/或数据网络接入标识(DNAI)确定；所述第一接入网设备的位置信息基于所述第一接入网设备的标识和/或所述第一接入网设备所属的跟踪区标识或注册区标识确定。
本实施例中，第一核心网设备向第一接入网设备发送的第一时延信息具体是依据第一路径所连接的网元节点的位置信息(包括第二核心网设备的位置信息和/或第一接入网设备的位置信息)、第一路径的网络状态、第一路径传输的数据类型(该数据类型具体为数据是上行数据类型或是下行数据类型)、第一路径传输的数据对应的业务特征(具体通过网络切片标识和/或DNN表征)、第一路径中是否存在中间第二核心网设备、终端用户的签约策略中的至少一种参量确定。
其中，第一路径所连接的网元节点的位置信息(包括第二核心网设备的位置信息和/或第一接入网设备的位置信息)具体可以是网元节点的实际地理位置。实际应用中，作为一种实施方式，可通过获得的网元节点信息中的网元节点的标识(第二核心网设备的标识和/或第一接入网设备的标识)确定对应 的网元节点的实际地理位置。作为另一种实施方式，可通过获得的第二核心网设备连接的数据网络(Data Network，DN)的数据网络接入标识(DNAI)确定所述第二核心网设备的位置，和/或，通过获得的第一接入网设备所属的跟踪区标识或注册区标识确定第一接入网设备的位置。
或者也可以说，第一路径所连接的网元节点的位置信息(包括第二核心网设备的位置信息和/或第一接入网设备的位置信息)也可以是网元节点的近似位置。实际应用中，第一核心网设备难以确定第二核心网设备的实际地理位置时，可将与第二核心网设备关联的其他网元设备的位置作为第二核心网设备的近似位置，例如与第二核心网设备连接的DN所在位置作为近似位置；或者说也可将DN的标识(即DNAI)作为是第二核心网设备的标识；或者对于第一接入网设备来说，将第一接入网设备所属的跟踪区或注册区作为第一接入网设备的近似位置，也可以说将跟踪区标识或注册区标识作为第一接入网设备的标识。
图3是本申请实施例提供的控制数据传输方法所应用的通信系统架构的逻辑关系示意图；如图3所示，该通信系统架构为5G系统的架构，具体可包括：UE、(无线)接入网((R)AN)、UPF、DN、访问和移动管理功能(Access and Mobility Management Function，AMF)、SMF、UDM、AUSF、NSSF、PCF、AF等网元设备；从图中的连接关系上来看，作为第二核心网设备的UPF与DN连接，因此在某些实施方式中可将DN的位置作为第二核心网设备的近似位置，也即通过DN的标识(即DNAI)确定第二核心网设备的位置。
本实施例中，第一核心网设备可按照上述信息预先配置映射关系集合，即不同的信息或信息组合对应一个第一时延信息，所述第一时延信息可依据经验或者测试结果确定或配置；实际应用中，可通过预先配置映射关系表格的形式实现。作为一种示例，参照表1所示，为基于DNAI和跟踪区(或注册区)标识(Tracking Area Id，TAI)确定第一时延信息的一种示意，可以根据DNAI的值和TAI的值确定第一时延信息。
表1
DNAI TAI 第一时延信息
DNAI＝001 TAI＝001 上行数据:1ms；下行数据:1.5ms
DNAI＝001 TAI＝002 上行数据和下行数据均是:1ms
DNAI＝002 TAI＝003 上行数据和下行数据均是:0.8ms
其中，所述第一路径的网络状态可通过判断网络状态参数是否满足预设条件。作为一种实施方式，当网络状态参数满足预设条件时，可确定第一网络状态；当网络状态参数不满足预设条件时，可确定第二网络状态。作为另一种实施方式，当网络状态参数满足第一预设条件时，可确定第一网络状态；当网络状态参数满足第二预设条件时，可确定第二网络状态；当网络状态参数既不满足第一预设条件又不满足第二预设条件参数时，可确定第三网络状态。作为一种示例，网络状态参数具体可以是传输速率，则判断网络状态参数是否满足预设条件具体可通过判断传输速率是否超过预设阈值确定；例如，当传输速率超过第一预设阈值时，确定网络状态参数满足预设条件；当传输速率不超过所述第一预设阈值时，确定网络状态参数不满足预设条件。又例如，当传输速率超过第一预设阈值时，确定网络状态参数满足第一预设条件；当传输速率不超过第二预设阈值时，确定网络状态参数满足第二预设条件；相应的，当传输速率超过第二预设阈值且不超过所述第一预设阈值时，确定网络状态参数既不满足第一预设条件又不满足第二预设条件参数。其中，第一网络状态可以是网络空闲状态，所述第二网络状态可以是网络繁忙状态(或者也可以称为网络拥塞状态)。
其中，所述第一路径是否存在中间第二核心网设备(例如第一路径中是否存在中间UPF实体)；若存在中间第二核心网设备，则数据的传输存在中间第二核心网设备的接收以及发出，这一过程依旧是需要时间的，因此在确定第一时延信息时，可考虑第一路径是否存在中间第二核心网设备的情况。
其中，所述第一路径传输的数据是上行数据或下行数据的类型不同也分别对应不同的时延。通常情况下，上行数据和下行数据的网络状态通常是不同的，例如，上行数据会比下行数据的拥塞少一些或弱一些，则上行数据对应的时延会小于下行数据的时延。
其中，所述第一路径传输的数据对应的网络切片标识可通过(Single-Network Slice Selection Assistance Information，S-NSSAI)单网络切片选择辅助信息表示，S-NSSAI标识和/或DNN可用来表示业务特征，该业务特征可表示对时延要求的业务特征；例如某数据对应于低时延要求的业务特征，则可通过该数据对应的S-NSSAI标识和/或DNN表示其为低时延要求的业务。
本实施例中，第一核心网设备可按照上述信息预先配置映射关系集合，即不同的信息或信息组合对应一个第一时延信息，所述第一时延信息可依据经验或者测试结果确定或配置；实际应用中，可通过预先配置映射关系表格的形式实现。例如，映射关系表格可表示相同的第一路径连接的网元设备(包括第二核心网设备的位置和第一接入网设备的位置)，则该表格中反映出两种信息以及对应的第一时延信息， 例如表格中的行表示的可以是第一路径的网络状态，列表示的可以是第一路径传输的数据对应的业务特征，即该表格表示的是在第二核心网设备的位置处于一个位置、第一接入网设备的位置处于另一个位置的情况下，当网络状态处于某种状态、传输的数据对应的业务特征处于某个特征时对应的第一时延信息。
在本申请的一种可选实施例中，所述第一核心网设备向第一接入网设备发送第一时延信息，包括：所述第一核心网设备通过第三核心网设备向第一接入网设备发送第一时延信息。
本实施例中，第一核心网设备和第一接入网设备之间的数据传输路径中往往存在其他核心网设备；以第一核心网设备为SMF实体、第一接入网设备为基站为例，则SMF与基站之间的数据传输路径至少还包括AMF实体，则SMF实体通过AMF实体向基站发送第一时延信息。可以理解，第一核心网设备通过至少一个第三核心网设备向第一接入网设备发送第一时延信息。
在本申请的一种可选实施例中，所述第一核心网设备向第一接入网设备发送第一时延信息，包括以下至少之一：所述第一核心网设备通过协议数据单元(Protocol Data Unit，PDU)会话建立过程中的第一消息向第一接入网设备发送第一时延信息；所述第一核心网设备通过PDU会话修改过程中的第二消息向第一接入网发送第一时延信息；所述第一核心网通过终端设备的网络注册过程中的第三消息向第一接入网发送第一时延信息；所述第一核心网通过终端设备接入的接入网设备切换过程中的第四消息向第一接入网发送第一时延信息。
本申请实施例的控制数据传输方法(即第一核心网设备向第一接入网设备发送第一时延信息)可发生在PDU会话建立过程、PDU会话修改过程、终端设备的网络注册过程、接入网设备切换过程中的至少一个过程中，可以理解，在上述过程中，可在第一核心网设备向第一接入网设备发送任意的消息中携带第一时延信息；或者，在第一核心网设备通过第三核心网设备向第一接入网设备发送的任意消息中携带第一时延信息。
在本申请的一种可选实施例中，所述方法还包括：所述第一核心网设备根据所述第一时延信息选择第二核心网设备。
本实施例中，若第一时延信息并非是基于第二核心网设备的位置确定的(比如是基于第一接入网设备的位置、第一路径的网络设备、第一路径传输的数据类型、第一路径传输的数据对应的业务特征、终端用户的签约策略中的至少一种信息确定的，或者是默认配置的)，则第一核心网设备还可基于第一时延信息选择一个第二核心网设备。
在本申请的一种可选实施例中，所述第一核心网设备根据所述第一时延信息选择第二核心网设备，包括：所述第一核心网设备根据所述第一时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
具体可参见图3的架构示意所示，与(无线)接入网((R)AN)连接的UPF可以是多个，图中仅以两个为例，不同的UPF的位置不同，即与(无线)接入网之间的路径不同，也即与(无线)接入网之间的路径的距离不同；每个UPF连接的DN也不同。则可基于第一时延信息确定UPF的位置范围，即确定至少一个UPF，再从确定的至少一个UPF中选择出一个UPF，例如可在确定的至少一个UPF中选择与基站最近的UPF。
作为一种实施方式，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
例如参照表1所示的示例，在已知第一时延信息和第一接入网设备的位置(即已知TAI)的情况下，可确定出至少一个第二核心网设备对应的DNAI；从确定的至少一个第二核心网设备对应的DNAI中选择一个DNAI，将选择的DNAI作为第二核心网设备。
在本申请的一种可选实施例中，所述第一时延信息基于时延信息和第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延。
其中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
本实施例中，第一时延信息是基于时延信息和第二时延信息确定的；所述时延信息具体可以是QoS参数中的PDB；第二时延信息表示空口时延；实际应用中，可通过PDB减去第二时延信息得到第一时延信息。
其中，所述第二时延信息由所述第一核心网设备从所述第一接入网设备处获得；作为一种示例，第一接入网设备预估所述第二时延信息，发送所述第二时延信息至所述第一核心网设备。
在本申请的一种可选实施例中，第一核心网设备基于第三时延信息选择第二核心网设备，即基于第三时延信息选择UPF实体。作为一种示例，第一核心网设备可根据第三时延信息表征的时延长短确定 以下信息的至少之一：可选择的第二核心网设备的区域范围、可选择的第二核心网设备对应的路径的网络状态、可选择的第二核心网设备对应的路径中是否支持存在中间第二核心网设备、可选择的第二核心网设备对应的路径传输的数据对应的网络切片标识和/或DNN、可选择的第二核心网设备对应的路径传输的数据是上行数据或是下行数据；基于确定的上述信息选择第二核心网设备。
例如，若第三时延信息表征的时延较短，则可确定可选择的第二核心网设备的位置与第一接入网设备的距离较近，或者可确定可选择的第二核心网设备对应的路径的拥塞状态较弱(即网络状态较为空闲)，或者可确定可选择的第二核心网设备对应的路径中不支持存在中间第二核心网设备，或者可确定可选择的第二核心网设备对应的路径传输的数据对应的网络切片标识和/或DNN表征传输的数据为低时延要求的数据，或者可确定可选择的第二核心网设备对应的路径传输的数据是上行数据等等。
通过本申请实施例的技术方案，通过第一核心网设备向第一接入网设备发送表征第二核心网设备与所述第一接入网设备之间的用户面数据路径的时延的第一时延信息，使得第一接入网设备基于该第一时延信息确定表征第一接入网设备与终端设备之间传输数据时延的第二时延信息，从而得到更接近实际情况的空口传输时延，也即得到更为准确的空口传输可调度时间，从另一方面可大大提高数据的传输效率。
本申请实施例还提供了一种控制数据传输方法。图4是本申请实施例提供的另一种控制数据传输方法的流程示意图；如图4所示，所述方法包括：
步骤S21：第一接入网设备接收来自第一核心网设备的第一时延信息；所述第一时延信息包括在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径；
步骤S22：所述第一接入网设备根据所述第一路径中的数据流对应的时延信息和所述第一时延信息确定第二时延信息；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
本实施例中，第一接入网设备可以是接入网中的任一设备，作为一种实施方式，第一接入网设备可以是基站，例如5G系统或NR系统中的gNB。第一核心网设备可以是核心网中的任一设备，作为一种实施方式，第一核心网设备可以是SMF实体。
本实施例中，第一时延信息表征第一路径的传输时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。作为一种实施方式，所述第二核心网设备可以是UPF实体，若第一接入网设备为基站，则第一路径为UPF实体至基站之间的数据传输路径。
本实施例中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。若第一路径为UPF实体至基站之间的数据传输路径，则第一上行时延信息为数据由基站至UPF实体之间的传输时延，第一下行时延信息为数据由UPF实体至基站之间的传输时延。
在本申请的一种可选实施例中，所述第一时延信息根据以下信息的至少之一确定：所述第二核心网设备的位置信息、所述第一接入网设备的位置信息、所述第一路径的网络状态、所述第一路径传输的数据是上行数据或下行数据、所述第一路径传输的数据对应的网络切片标识和/或DNN、所述第一路径是否存在中间第二核心网设备、签约策略。
在本申请的一种可选实施例中，所述第二核心网设备的位置信息基于所述第二核心网设备的标识和/或DNAI确定；所述第一接入网设备的位置信息基于所述第一接入网设备的标识和/或所述第一接入网设备所属的跟踪区标识或注册区标识确定。
本实施例中，第二核心网设备的位置信息可以通过第二核心网设备的近似位置表示，可将与第二核心网设备关联的其他网元设备的位置作为第二核心网设备的近似位置，例如与第二核心网设备连接的DN所在位置作为近似位置，即可通过DN的标识(即DNAI)作为是第二核心网设备的标识。第一接入网设备的位置信息可通过第一接入网设备的近似位置表示，将第一接入网设备所属的跟踪区或注册区作为第一接入网设备的近似位置，也可以说将跟踪区标识或注册区标识作为第一接入网设备的标识。
在本申请的一种可选实施例中，所述第一时延信息基于所述时延信息和所述第二时延信息确定。所述时延信息具体可以是QoS参数中的PDB；第二时延信息表示空口时延；实际应用中，可通过PDB减去第二时延信息得到第一时延信息。
在本申请的一种可选实施例中，所述方法还包括：所述第一接入网设备发送所述第二时延信息至所述第一核心网设备，以使所述第一核心网设备科基于所述第二时延信息确定第一时延信息。
本实施例中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
其中，所述时延信息具体可以是QoS参数中的PDB；对于每个终端设备可建立至少一个PDU会话(PDU Session)；每个PDU会话可具有多个QoS流(QoS Flow)(该QoS流可理解为本申请实施例中 的数据流)，每个QoS流对应一个QoS参数，即本实施例中第一接入网根据第一路径中的数据流对应的PDB和接收到的第一时延信息确定出第二时延信息，所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延，也即所述第二时延信息表示空口时延。实际应用中，可通过PDB减去第一时延信息得到第二时延信息。例如，通过上行时延信息减去第一上行时延信息得到第二上行时延信息；又例如，通过下行时延信息减去第二上行时延信息得到第二下行时延信息。
在本申请的一种可选实施例中，所述方法还包括：所述第一接入网设备发送所述第二时延信息至所述终端设备；或者，所述第一接入网设备发送所述第二上行时延信息至所述终端设备。
本实施例中，第一接入网设备将第二时延信息(包括第二上行时延信息和/或第二下行时延信息)发送至终端设备，以使终端设备根据第二时延信息进行上行数据的调度；或者，第一接入网仅将第二上行时延信息发送至终端设备，以使终端设备根据第二上行时延信息进行上行数据的调度。
在本申请的一种可选实施例中，所述方法还包括：所述第一接入网设备根据所述第二时延信息确定调度策略，发送所述调度策略至所述终端设备。
本实施方式中，第一接入网并未将第二时延信息发送至终端设备，而是根据第二时延信息确定调度策略，将调度策略发送至终端设备，以使终端设备执行该调度策略进行上行数据的传输。其中，所述调度策略使得终端设备执行对于上行数据和/或下行数据在特定的时间点和/或时间间隔进行传输；其中，所述时间点可以是基于特定的无线帧的子帧符号定义。
实际应用中，第一接入网设备可根据网络的实际情况和/或终端的能力选择向终端设备发送第二时延信息(或发送第二上行时延信息)，或是发送调度策略。
在本申请的一种可选实施例中，若第一接入网设备未接收到来自第一核心网设备的第一时延信息，则第一接入网设备根据所述第一路径中的数据流对应的时延信息以及预先配置的默认时延信息确定第二时延信息。所述默认时延信息为预先配置的第一路径传输数据的时延，所述默认时延信息例如为1ms、2ms、10ms等等。实际应用中，可通过所述时延信息减去所述默认时延信息得到第二时延信息。
通过本申请实施例的技术方案，通过第一核心网设备向第一接入网设备发送表征第二核心网设备与所述第一接入网设备之间的用户面数据路径的时延的第一时延信息，使得第一接入网设备基于该第一时延信息确定表征第一接入网设备与终端设备之间传输数据时延的第二时延信息，从而得到更接近实际情况的空口传输时延，也即得到更为准确的空口传输可调度时间，从另一方面可大大提高数据的传输效率。
下面结合具体的示例对本申请实施例的控制数据传输方法的应用场景进行说明。
图5a至图5c是本申请实施例提供的控制数据传输方法的应用流程示意图；其中，图5a表示本申请实施例的控制数据传输应用于PDU会话建立过程；如图5a所示，包括：
步骤101：UE向AMF发起PDU会话建立请求(PDU Session Establishment Request)；
步骤102：AMF执行SMF选择(SMF selection)；
步骤103：AMF向SMF发起上下行请求(Nsmf_PDU Session_Create SMContext Request)；
步骤104a-b：SMF和UDM之间执行为更新的/订阅检索/订阅(Registration/Subscription retrieval/Subscription for updates)；
步骤105：SMF向AMF发送上下文响应(Nsmf_PDU Session_Create SMContext Response)；
步骤106：执行PDU会话鉴权/授权(PDU Session authentication/authorization)；
步骤107a-b：SMF执行PCF选择(PCF selection)，SMF与PCF之间执行策略关联建立或策略关联修改(SM Policy Association Establishment or SMF initiated SM Policy Association Modification)；
步骤108：SMF执行UPF选择(UPF selection)；
步骤109：SMF启动SM策略关联修改(SMF initiated SM Policy Association Modification)；
步骤110a-b：SMF向UPF发送N4会话建立/修改请求(N4Session Establishment/Modification Request)；UPF向SMF发送N4会话建立/修改响应(N4Session Establishment/Modification Response)；
步骤111：SMF向AMF传输消息(Namf_Communication_N1N2 Message Transfer)，消息中携带第一时延信息。
步骤112：AMF向接入网(例如基站)发送PDU会话请求(N2 PDU Session Request)，该PDU会话请求中携带所述第一时延信息；接入网基于该第一时延消息以及QoS参数中的PDB确定第二时延信息；
步骤113：接入网向UE发送资源建立消息(AN-specific resource setup)，该资源建立消息携带所述第二时延信息；
步骤114：接入网向AMF发送PDU会话请求确认(N2 PDU Session Request Ack)。至此，UE与UPF之间传输第一个上行数据(First Uplink Data)；
步骤115：AMF向SMF发送上下文请求(Nsmf_PDU Session_Update SMContext Request)；
步骤116a-b：SMF向UPF发送会话修改请求(N4Session Modification Request)，UPF向SMF发送会话修改响应(N4Session Modification Response)。至此之前，UPF与UE之间传输第一个下行数据(First Downlink Data)；
步骤117：SMF向AMF发送上下文响应(Nsmf_PDU Session_Update SMContext Response)；
步骤118：SMF向AMF发送上下文状态通知(Nsmf_PDU Session_Update SMContextStatusNotify)；
步骤119：SMF向UE发送IPv6地址配置消息(IPv6Address Configuration)；
步骤120：SMF与UDM之间执行退订/取消登记(Unsubscription/Deregistration)。
图5b表示本申请实施例的控制数据传输应用于PDU会话修改过程，该过程例如网络状态发生改变、路径改变等等。如图5b所示，包括：
步骤201a：UE向AMF发送PDU会话修改请求(PDU Session Modification Request)，AMF向SMF发送PDU会话更新SM上下文(Nsmf_PDU Session_Update SMContext)；
可选的，所述PDU会话修改请求中可携带时延更新标识；相应的，所述PDU会话更新SM上下文中可携带时延更新标识；本场景下，UE触发第一时延信息的更新；
步骤201b-d：SMF基于PDU会话的更新执行PCF启动SM策略关联修改(PCF initiated SM Policy Association Modification)，并通知UDM(Nudm_SDM_Notification)；本场景下，SMF触发第一时延信息的更新；
步骤201e：接入网(RAN)向AMF发送N2消息(N2Message)，所述N2消息中携带PDU会话标识(PDU Session ID)、SM信息(SM information)，AMF向SMF发送PDU会话更新SM上下文(Nsmf_PDU Session_Update SM Context)；
步骤202：SMF启动SM策略关联修改(SMF initiated SM Policy Association Modification)；
步骤203a-b：SMF向AMF发送PDU会话更新SM上下文响应(Response of Nsmf_PDU Session_Update SM Context)；SMF向AMF传输消息(Namf_Communication_N1N2 Message Transfer)，该消息中携带第一时延信息；
步骤204：AMF向接入网发送N2会话请求(N2 PDU Session Request)，该请求中携带第一时延信息；接入网基于该第一时延消息以及QoS参数中的PDB确定第二时延信息；
步骤205：接入网向UE发送资源修改消息(AN-specific resource modification)，消息中携带第二时延信息；
步骤206：接入网向AMF发送N2会话响应(N2 Session Response)；
步骤207a-b：AMF向SMF发送PDU会话更新SM上下文请求(Nsmf_PDU Session_Update SMContext Request)；SMF向AMF发送PDU会话更新SM上下文响应(Nsmf_PDU Session_Update SMContext Response)；
步骤208a-b：SMF向UPF发送N4会话修改请求(N4Session Modification Request)；UPF向SMF发送N4会话修改响应(N4Session Modification Response)；
步骤209：UE向接入网发送PDU会话修改命令确认消息(PDU Session Modification Command Ack)；
步骤210：接入网向AMF发送N2 NAS上行传输(N2 NAS uplink transfer)；
步骤211a-b：AMF向SMF发送PDU会话更新SM上下文请求(Nsmf_PDU Session_Update SMContext Request)；SMF向AMF发送PDU会话更新SM上下文响应(Nsmf_PDU Session_Update SMContext Response)；
步骤212a-b：SMF向UPF发送会话修改请求(Session Modification Request)；UPF向SMF发送会话修改响应(Session Modification Response)；
步骤213：SMF启动SM策略关联修改(SMF initiated SM Policy Association Modification)。
图5c表示本申请实施例的控制数据传输应用于终端设备的注册过程，例如注册更新过程、空闲态(IDLE状态)下的终端设备由EPS迁移至5GS等等；则本示例中，可包括更新前(或切换前，或迁移前)的旧AMF(OLD AMF)；以及包括更新后(或切换后，或迁移后)的新AMF(NEW AMF)。如图5c所示，包括：
步骤301：UE向接入网发起注册请求(Registration Request)；
步骤302：接入网执行AMF选择(AMF selection)；
步骤303：接入网向新AMF发送注册请求(Registration Request)；
步骤304-步骤305：新AMF向旧AMF发送上下文传输(Nsmf_Communication_UE ContextTransfer)；旧AMF向新AMF发送上下文传输响应(Nsmf_Communication_UE ContextTransfer Response)；
步骤306-步骤307：新AMF向UE发送标识请求(Identity Request)，UE向新AMF发送标识响应 (Identity Response)；
步骤308：新AMF执行AUSF选择(AUSF selection)；
步骤309：执行认证/安全流程(Authentication/Security)；
步骤310：新AMF与旧AMF之间传输注册完成通知(Nsmf_Communication_RegistrationCompleteNotify)；
步骤311：UE与新AMF之间传输标识请求与标识响应(Identity Request/Response)；
步骤312：新AMF与EIR之间传输设备标识查验(N5g-EIR_Equipment IdentityCheck_Get)；
步骤313：新AMF执行UDM选择(UDM selection)；
步骤314：新AMF与UDM之间执行注册(Nudm_UECM_Registration)、获得(Nudm_SDM_Get)、订阅(Nudm_SDM_Subscribe)、取消登记(Nudm_UCM_DeregistrationNotify)及取消订阅(Nudm_SDM_Unsubscribe)等流程；
步骤315：新AMF执行PCF选择(PCF selection)；
步骤316：新AMF执行与PCF之间的注册过程中的策略关联建立(AM Policy Association Establishment during Registration)；
步骤317：SMF与新AMF之间传输PDU会话更新SM上下文(Nsmf_PDU Session_Update SMContext)、PDU会话释放SM上下文(Nsmf_PDU Session_Release SMContext)；其中，SMF向新AMF发送的消息中携带第一时延信息；
步骤318-步骤319：新AMF向N3IWF发送N2 AMF修改请求(N2 AMF Mobility Request)；N3IWF向新AMF发送N2 AMF修改响应(N2 AMF Mobility Response)；
步骤320：PCF与旧AMF之间传输AMF启动AM策略关联终止(AMF-Initiated AM Policy Association Termination)；
步骤321-步骤322：新AMF向UE发送注册接收(Registration Accept)；UE向新AMF发送注册完成(Registration Complete)。
本申请实施例还提供了一种核心网设备，该核心网设备记为第一核心网设备。图6是本申请实施例提供的一种核心网设备的示意性框图；如图6所示，所述核心网设备包括：第一通讯单元41，配置为向第一接入网设备发送第一时延信息，所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。
在本申请的一种可选实施例中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。
在本申请的一种可选实施例中，如图7所示，所述核心网设备还包括第一处理单元42，配置为所述第一通讯单元41向第一接入网设备发送第一时延信息之前，确定所述第一时延信息；所述第一时延信息根据以下信息的至少之一确定：所述第二核心网设备的位置信息、所述第一接入网设备的位置信息、所述第一接入网设备对应的注册区标识、所述第一路径的网络状态、所述第一路径传输的数据是上行数据或下行数据、所述第一路径传输的数据对应的网络切片标识和/或DNN、所述第一路径是否存在中间第二核心网设备、签约策略。可选的，所述第二核心网设备的位置信息基于所述第二核心网设备的标识和/或DNAI确定；所述第一接入网设备的位置信息基于所述第一接入网设备的标识和/或所述第一接入网设备所属的跟踪区标识或注册区标识确定。
在本申请的一种可选实施例中，所述第一通讯单元41，配置为通过以下方式的至少之一向第一接入网设备发送第一时延信息：通过PDU会话建立过程中的第一消息向第一接入网设备发送第一时延信息；通过PDU会话修改过程中的第二消息向第一接入网发送第一时延信息；通过终端设备的网络注册过程中的第三消息向第一接入网发送第一时延信息；通过终端设备接入的接入网设备切换过程中的第四消息向第一接入网发送第一时延信息。
在本申请的一种可选实施例中，所述第一通讯单元41，配置为通过第三核心网设备向第一接入网设备发送第一时延信息。
在本申请的一种可选实施例中，所述第一处理单元42，还配置为根据所述第一时延信息选择第二核心网设备。
在本申请的一种可选实施例中，所述第一处理单元42，配置为根据所述第一时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
在本申请的一种可选实施例中，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
在本申请的一种可选实施例中，所述第一时延信息基于时延信息和第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延；所述时延信息表征在所述第二 核心网设备与终端设备之间传输数据的时延。
在本申请的一种可选实施例中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，
所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
在本申请的一种可选实施例中，所述第一通讯单元41，还配置为获得来自所述第一接入网设备的所述第二时延信息。
本申请实施例还提供了一种接入网设备。图8是本申请实施例提供的一种接入网设备的示意性框图；如图8所示，所述接入网设备包括：第二通讯单元51和第二处理单元52；其中，
所述第二通讯单元51，配置为接收来自第一核心网设备的第一时延信息；所述第一时延信息包括在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径；
所述第二处理单元52，配置为根据所述第一路径中的数据流对应的时延信息和所述第二通讯单元51接收的所述第一时延信息确定第二时延信息；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
在本申请的一种可选实施例中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。
在本申请的一种可选实施例中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
在本申请的一种可选实施例中，所述第二通讯单元51，还配置为发送所述第二时延信息至所述终端设备；或者，发送所述第二上行时延信息至所述终端设备。
在本申请的一种可选实施例中，所述第二处理单元52，还配置为根据所述第二时延信息确定调度策略；
所述第二通讯单元51，还配置为发送所述第二处理单元52确定的所述调度策略至所述终端设备。其中，所述调度策略用于使所述终端设备执行对于上行数据和/或下行数据在特定的时间点和/或时间间隔进行传输；其中，所述时间点可以是基于特定的无线帧的子帧符号定义。
在本申请的一种可选实施例中，所述第一时延信息基于所述时延信息和所述第二时延信息确定。
在本申请的一种可选实施例中，所述第二通讯单元51，还配置为发送所述第二时延信息至所述第一核心网设备。
本申请实施例还提供了一种设备选择方法，所述方法包括：
步骤S31：第一核心网设备根据第三时延信息选择第二核心网设备；所述第三时延信息表征在第二路径传输数据的时延；所述第二路径为第二核心网设备与第一接入网设备之间的用户面数据路径，或者，所述第二路径为第二核心网设备与终端设备之间的用户面数据路径。
本实施例中，第一核心网设备可以是核心网中的任一设备，作为一种实施方式，第一核心网设备可以是SMF实体。第一接入网设备可以是接入网中的任一设备，作为一种实施方式，第一接入网设备可以是基站，例如5G系统或NR系统中的gNB。
第三时延信息表征第二路径的传输时延；所述第二路径可以是第二核心网设备与第一接入网设备之间的用户面数据路径，或者是第二核心网设备与终端设备之间的用户面数据路径。作为一种实施方式，第二核心网设备可以是UPF实体，则第二路径可以是UPF实体与基站之间的数据传输路径，或者UPF实体与终端设备(即终端)之间的数据传输路径。
本实施例中，所述第三时延信息包括在第二路径传输数据的第三上行时延信息和/或第三下行时延信息。
在本申请的一种可选实施例中，所述第一核心网设备根据所述第三时延信息选择第二核心网设备，包括：所述第一核心网设备根据所述第三时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
具体可参见图3的架构示意所示，与(无线)接入网((R)AN)连接的UPF可以是多个，图中仅以两个为例，不同的UPF的位置不同，即与(无线)接入网之间的路径不同，也即与(无线)接入网之间的路径的距离不同；每个UPF连接的DN也不同。则可基于第一时延信息确定UPF的位置范围，即确定至少一个UPF，再从确定的至少一个UPF中选择出一个UPF，例如可在确定的至少一个UPF中选择与基站最近的UPF。
在本申请的一种可选实施例中，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
例如参照前述表1所示的示例，设定表1中的第一时延信息即为本实施例中的第三时延信息，在已知第三时延信息和第一接入网设备的位置(即已知TAI)的情况下，可确定出至少一个第二核心网设备对应的DNAI；从确定的至少一个第二核心网设备对应的DNAI中选择一个DNAI，将选择的DNAI作为第二核心网设备。
在本申请的一种可选实施例中，所述第三时延信息基于第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。可选的，所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。本实施例中，第三时延信息是基于时延信息和第二时延信息确定的；所述时延信息具体可以是QoS参数中的PDB；第二时延信息表示空口时延；实际应用中，可通过PDB减去第二时延信息得到第三时延信息。
在本申请的一种可选实施例中，所述第二时延信息由所述第一核心网设备从所述第一接入网设备处获得；作为一种示例，第一接入网设备预估所述第二时延信息，发送所述第二时延信息至所述第一核心网设备。
在本申请的一种可选实施例中，第一核心网设备基于第三时延信息选择第二核心网设备，即基于第三时延信息选择UPF实体。作为一种示例，第一核心网设备可根据第三时延信息表征的时延长短确定以下信息的至少之一：可选择的第二核心网设备的区域范围、可选择的第二核心网设备对应的路径的网络状态、可选择的第二核心网设备对应的路径中是否支持存在中间第二核心网设备、可选择的第二核心网设备对应的路径传输的数据对应的网络切片标识和/或DNN、可选择的第二核心网设备对应的路径传输的数据是上行数据或是下行数据；基于确定的上述信息选择第二核心网设备。
例如，若第三时延信息表征的时延较短，则可确定可选择的第二核心网设备的位置与第一接入网设备的距离较近，或者可确定可选择的第二核心网设备对应的路径的拥塞状态较弱(即网络状态较为空闲)，或者可确定可选择的第二核心网设备对应的路径中不支持存在中间第二核心网设备，或者可确定可选择的第二核心网设备对应的路径传输的数据对应的网络切片标识和/或DNN表征传输的数据为低时延要求的数据，或者可确定可选择的第二核心网设备对应的路径传输的数据是上行数据等等。
具体可参见图3的架构示意所示，与(无线)接入网((R)AN)连接的UPF可以是多个，图中仅以两个为例，不同的UPF的位置不同，即与(无线)接入网之间的路径不同，也即与(无线)接入网之间的路径的距离不同；每个UPF连接的DN也不同。则可基于第三时延信息确定UPF的范围，即确定至少一个UPF，再从确定的至少一个UPF中选择出一个UPF，例如可在确定的至少一个UPF中选择与基站最近的UPF。
在本申请的一种可选实施例中，所述第一核心网设备根据第三时延信息选择第二核心网设备之前，所述方法还包括：所述第一核心网设备根据签约信息确定所述第三时延信息；其中，所述第一核心网设备预先配置所述签约信息；或者，所述第一核心网设备从其他核心网设备获得所述签约信息。
可以理解，基于签约信息确定的所述第三时延信息表明的是第二路径所允许的数据传输时延，也即第二核心网设备与第一接入网设备之间允许的数据传输时延，或者第二核心网设备与终端设备之间的数据传输时延。
本申请实施例还提供了一种核心网设备，所述核心网设备为第一核心网设备；所述核心网设备包括选择单元，配置为根据第三时延信息选择第二核心网设备；所述第三时延信息表征在第二路径传输数据的时延；所述第二路径为第二核心网设备与第一接入网设备之间的用户面数据路径，或者，所述第二路径为第二核心网设备与终端设备之间的用户面数据路径。
本实施例中，所述第三时延信息包括在第二路径传输数据的第三上行时延信息和/或第三下行时延信息。
在本申请的一种可选实施例中，所述核心网设备还包括确定单元，配置为所述选择单元根据第三时延信息选择第二核心网设备之前，根据签约信息确定所述第三时延信息。
在本申请的一种可选实施例中，所述选择单元，配置为根据所述第三时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
在本申请的一种可选实施例中，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
在本申请的一种可选实施例中，所述第三时延信息基于第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
可选的，所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
在本申请的一种可选实施例中，所述核心网设备还包括第三通讯单元，配置为从所述第一接入网设备处获得所述第二时延信息。
图9是本申请实施例提供的一种通信设备的硬件结构示意图。图9所示的通信设备600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图9所示，通信设备600还可以包括存储器620。其中，处理器610可以从存储器620中调用并运行计算机程序，以实现本申请实施例中的方法。其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，如图9所示，通信设备600还可以包括收发器630，处理器610可以控制该收发器630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。其中，收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备600具体可为本申请实施例的核心网设备，并且该通信设备600可以实现本申请实施例的各个控制数据传输方法或设备选择方法中由核心网设备实现的相应流程，为了简洁，在此不再赘述。可选地，该通信设备600具体可为本申请实施例的接入网设备，并且该通信设备600可以实现本申请实施例的各个方法中由接入网设备实现的相应流程，为了简洁，在此不再赘述。
图10是本申请实施例的芯片的示意性结构图。图10所示的芯片700包括处理器710，处理器710可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图10所示，芯片700还可以包括存储器720。其中，处理器710可以从存储器720中调用并运行计算机程序，以实现本申请实施例中的方法。其中，存储器720可以是独立于处理器710的一个单独的器件，也可以集成在处理器710中。
可选地，该芯片700还可以包括输入接口730。其中，处理器710可以控制该输入接口730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片700还可以包括输出接口740。其中，处理器710可以控制该输出接口740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的核心网设备，并且该芯片可以实现本申请实施例的各个控制数据传输方法或设备选择方法中由核心网设备实现的相应流程，为了简洁，在此不再赘述。可选地，该芯片可应用于本申请实施例中的接入网设备，并且该芯片可以实现本申请实施例的各个方法中由接入网设备实现的相应流程，为了简洁，在此不再赘述。应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机 存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的核心网设备，并且该计算机程序使得计算机执行本申请实施例的各个控制数据传输方法或设备选择方法中由核心网设备实现的相应流程，为了简洁，在此不再赘述。可选地，该计算机可读存储介质可应用于本申请实施例中的接入网设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由接入网设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的核心网设备，并且该计算机程序指令使得计算机执行本申请实施例的各个控制数据传输方法或设备选择方法中由核心网设备实现的相应流程，为了简洁，在此不再赘述。可选地，该计算机程序产品可应用于本申请实施例中的接入网设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由接入网设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的核心网设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个控制数据传输方法或设备选择方法中由核心网设备实现的相应流程，为了简洁，在此不再赘述。可选地，该计算机程序可应用于本申请实施例中的接入网设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由接入网设备实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (62)

  1. 一种控制数据传输方法，所述方法包括：
    第一核心网设备向第一接入网设备发送第一时延信息，所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。
  2. 根据权利要求1所述的方法，其中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。
  3. 根据权利要求1或2所述的方法，其中，所述第一核心网设备向第一接入网设备发送第一时延信息之前，所述方法还包括：
    所述第一核心网设备确定所述第一时延信息；所述第一时延信息根据以下信息的至少之一确定：
    所述第二核心网设备的位置信息、所述第一接入网设备的位置信息、所述第一路径的网络状态、所述第一路径传输的数据是上行数据或下行数据、所述第一路径传输的数据对应的网络切片标识和/或数据网络名DNN、所述第一路径是否存在中间第二核心网设备、签约策略。
  4. 根据权利要求3所述的方法，其中，所述第二核心网设备的位置信息基于所述第二核心网设备的标识和/或数据网络接入标识DNAI确定；所述第一接入网设备的位置信息基于所述第一接入网设备的标识和/或所述第一接入网设备所属的跟踪区标识或注册区标识确定。
  5. 根据权利要求1至4任一项所述的方法，其中，所述第一核心网设备向第一接入网设备发送第一时延信息，包括以下至少之一：
    所述第一核心网设备通过协议数据单元PDU会话建立过程中的第一消息向第一接入网设备发送第一时延信息；
    所述第一核心网设备通过PDU会话修改过程中的第二消息向第一接入网发送第一时延信息；
    所述第一核心网通过终端设备的网络注册过程中的第三消息向第一接入网发送第一时延信息；
    所述第一核心网通过终端设备接入的接入网设备切换过程中的第四消息向第一接入网发送第一时延信息。
  6. 根据权利要求1至5任一项所述的方法，其中，所述第一核心网设备向第一接入网设备发送第一时延信息，包括：
    所述第一核心网设备通过第三核心网设备向第一接入网设备发送第一时延信息。
  7. 根据权利要求1所述的方法，其中，所述方法还包括：
    所述第一核心网设备根据所述第一时延信息选择第二核心网设备。
  8. 根据权利要求7所述的方法，其中，所述第一核心网设备根据所述第一时延信息选择第二核心网设备，包括：
    所述第一核心网设备根据所述第一时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
  9. 根据权利要求8所述的方法，其中，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
  10. 根据权利要求1至9任一项所述的方法，其中，所述第一时延信息基于时延信息和第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延。
  11. 根据权利要求10所述的方法，其中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，
    所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
  12. 根据权利要求10或11所述的方法，其中，所述第二时延信息由所述第一核心网设备从所述第一接入网设备处获得。
  13. 一种控制数据传输方法，所述方法包括：
    第一接入网设备接收来自第一核心网设备的第一时延信息；所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径；
    所述第一接入网设备根据所述第一路径中的数据流对应的时延信息和所述第一时延信息确定第二时延信息；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
  14. 根据权利要求13所述的方法，其中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。
  15. 根据权利要求13所述的方法，其中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，
    所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
  16. 根据权利要求15所述的方法，其中，所述方法还包括：
    所述第一接入网设备发送所述第二时延信息至所述终端设备；或者，
    所述第一接入网设备发送所述第二上行时延信息至所述终端设备。
  17. 根据权利要求13至16任一项所述的方法，其中，所述方法还包括：
    所述第一接入网设备根据所述第二时延信息确定调度策略，发送所述调度策略至所述终端设备。
  18. 根据权利要求17所述的方法，其中，所述调度策略用于使所述终端设备执行对于上行数据和/或下行数据在特定的时间点和/或时间间隔进行传输；其中，所述时间点可以是基于特定的无线帧的子帧符号定义。
  19. 根据权利要求13至16任一项所述的方法，其中，所述第一时延信息基于所述时延信息和所述第二时延信息确定。
  20. 根据权利要求19所述的方法，其中，所述方法还包括：所述第一接入网设备发送所述第二时延信息至所述第一核心网设备。
  21. 一种核心网设备，所述核心网设备作为第一核心网设备，所述核心网设备包括：第一通讯单元，配置为向第一接入网设备发送第一时延信息，所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径。
  22. 根据权利要求21所述的核心网设备，其中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。
  23. 根据权利要求21或22所述的核心网设备，其中，所述核心网设备还包括第一处理单元，配置为所述第一通讯单元向第一接入网设备发送第一时延信息之前，确定所述第一时延信息；所述第一时延信息根据以下信息的至少之一确定：
    所述第二核心网设备的位置信息、所述第一接入网设备的位置信息、所述第一路径的网络状态、所述第一路径传输的数据是上行数据或下行数据、所述第一路径传输的数据对应的业务特征、所述第一路径是否存在中间第二核心网设备、签约策略。
  24. 根据权利要求23所述的核心网设备，其中，所述第二核心网设备的位置信息基于所述第二核心网设备的标识和/或DNAI确定；所述第一接入网设备的位置信息基于所述第一接入网设备的标识和/或所述第一接入网设备所属的跟踪区标识或注册区标识确定。
  25. 根据权利要求21至24任一项所述的核心网设备，其中，所述第一通讯单元，配置为通过以下方式的至少之一向第一接入网设备发送第一时延信息：通过PDU会话建立过程中的第一消息向第一接入网设备发送第一时延信息；通过PDU会话修改过程中的第二消息向第一接入网发送第一时延信息；通过终端设备的网络注册过程中的第三消息向第一接入网发送第一时延信息；通过终端设备接入的接入网设备切换过程中的第四消息向第一接入网发送第一时延信息。
  26. 根据权利要求21至25任一项所述的核心网设备，其中，所述第一通讯单元，配置为通过第三核心网设备向第一接入网设备发送第一时延信息。
  27. 根据权利要求21所述的核心网设备，其中，所述第一处理单元，还配置为根据所述第一时延信息选择第二核心网设备。
  28. 根据权利要求27所述的核心网设备，其中，所述第一处理单元，配置为根据所述第一时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
  29. 根据权利要求28所述的核心网设备，其中，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
  30. 根据权利要求21至29任一项所述的核心网设备，其中，所述第一时延信息基于时延信息和第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延。
  31. 根据权利要求30所述的核心网设备，其中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，
    所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息 和/或第二下行时延信息。
  32. 根据权利要求30或31所述的核心网设备，其中，所述第一通讯单元，还配置为获得来自所述第一接入网设备的所述第二时延信息。
  33. 一种接入网设备，所述接入网设备包括：第二通讯单元和第二处理单元；其中，
    所述第二通讯单元，配置为接收来自第一核心网设备的第一时延信息；所述第一时延信息表征在第一路径传输数据的时延；所述第一路径为第二核心网设备与所述第一接入网设备之间的用户面数据路径；
    所述第二处理单元，配置为根据所述第一路径中的数据流对应的时延信息和所述第二通讯单元接收的所述第一时延信息确定第二时延信息；所述时延信息表征在所述第二核心网设备与终端设备之间传输数据的时延；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
  34. 根据权利要求33所述的接入网设备，其中，所述第一时延信息包括在所述第一路径传输数据的第一上行时延信息和/或第一下行时延信息。
  35. 根据权利要求33所述的接入网设备，其中，所述时延信息包括在所述第二核心网设备与终端设备之间传输数据的上行时延信息和/或下行时延信息；和/或，
    所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
  36. 根据权利要求35所述的接入网设备，其中，所述第二通讯单元，还配置为发送所述第二时延信息至所述终端设备；或者，发送所述第二上行时延信息至所述终端设备。
  37. 根据权利要求33至36任一项所述的接入网设备，其中，所述第二处理单元，还配置为根据所述第二时延信息确定调度策略；
    所述第二通讯单元，还配置为发送所述第二处理单元确定的所述调度策略至所述终端设备。
  38. 根据权利要求37所述的接入网设备，其中，所述调度策略用于使所述终端设备执行对于上行数据和/或下行数据在特定的时间点和/或时间间隔进行传输；其中，所述时间点可以是基于特定的无线帧的子帧符号定义。
  39. 根据权利要求33至36任一项所述的接入网设备，其中，所述第一时延信息基于所述时延信息和所述第二时延信息确定。
  40. 根据权利要求39所述的接入网设备，其中，所述第二通讯单元，还配置为发送所述第二时延信息至所述第一核心网设备。
  41. 一种设备选择方法，所述方法包括：
    第一核心网设备根据第三时延信息选择第二核心网设备；所述第三时延信息表征在第二路径传输数据的时延；所述第二路径为第二核心网设备与第一接入网设备之间的用户面数据路径，或者，所述第二路径为第二核心网设备与终端设备之间的用户面数据路径。
  42. 根据权利要求41所述的方法，其中，所述第一核心网设备根据所述第三时延信息选择第二核心网设备，包括：
    所述第一核心网设备根据所述第三时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
  43. 根据权利要求42所述的方法，其中，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
  44. 根据权利要求41至43任一项所述的方法，其中，所述第三时延信息基于第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
  45. 根据权利要求44所述的方法，其中，所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
  46. 根据权利要求44或45所述的方法，其中，所述第二时延信息由所述第一核心网设备从所述第一接入网设备处获得。
  47. 根据权利要求41所述的方法，其中，所述第三时延信息包括在第二路径传输数据的第三上行时延信息和/或第三下行时延信息。
  48. 根据权利要求41所述的方法，其中，所述第一核心网设备根据第三时延信息选择第二核心网设备之前，所述方法还包括：
    所述第一核心网设备根据签约信息确定所述第三时延信息。
  49. 一种核心网设备，所述核心网设备为第一核心网设备；所述核心网设备包括选择单元，配置为根据第三时延信息选择第二核心网设备；所述第三时延信息表征在第二路径传输数据的时延；所述第二路径为第二核心网设备与第一接入网设备之间的用户面数据路径，或者，所述第二路径为第二核心网设 备与终端设备之间的用户面数据路径。
  50. 根据权利要求49所述的核心网设备，其中，所述选择单元，配置为根据所述第三时延信息确定待选择的第二核心网设备的位置信息，根据所述选择的第二核心网设备的位置信息选择第二核心网设备。
  51. 根据权利要求50所述的核心网设备，其中，所述待选择的第二核心网的位置信息基于DNAI和/或第二核心网设备的标识确定。
  52. 根据权利要求49至51任一项所述的核心网设备，其中，所述第三时延信息基于第二时延信息确定；所述第二时延信息表征在所述第一接入网设备与所述终端设备之间传输数据的时延。
  53. 根据权利要求52所述的核心网设备，其中，所述第二时延信息包括在所述第一接入网设备与所述终端设备之间传输数据的第二上行时延信息和/或第二下行时延信息。
  54. 根据权利要求52或53所述的核心网设备，其中，所述核心网设备还包括第三通讯单元，配置为从所述第一接入网设备处获得所述第二时延信息。
  55. 根据权利要求49所述的核心网设备，其中，所述第三时延信息包括在第二路径传输数据的第三上行时延信息和/或第三下行时延信息。
  56. 根据权利要求49所述的核心网设备，其中，所述核心网设备还包括确定单元，配置为所述选择单元根据第三时延信息选择第二核心网设备之前，根据签约信息确定所述第三时延信息。
  57. 一种核心网设备，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行权利要求1至12任一项所述方法的步骤；或者，所述处理器用于运行所述计算机程序时，执行权利要求41至48任一项所述方法的步骤。
  58. 一种接入网设备，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，其中，所述处理器用于运行所述计算机程序时，执行权利要求13至20任一项所述方法的步骤。
  59. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至12任一项所述的方法；或者，使得安装有所述芯片的设备执行如权利要求13至20任一项所述的方法；或者，使得安装有所述芯片的设备执行如权利要求41至48任一项所述的方法。
  60. 一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被处理器执行时实现权利要求1至12任一项所述方法的步骤；或者，该计算机程序被处理器执行时实现权利要求13至20任一项所述方法的步骤；或者，该计算机程序被处理器执行时实现权利要求41至48任一项所述方法的步骤。
  61. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至12任一项所述的方法；或者，该计算机程序指令使得计算机执行如权利要求13至20任一项所述的方法；或者，该计算机程序指令使得计算机执行如权利要求41至48任一项所述的方法。
  62. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1至12任一项所述的方法；或者，所述计算机程序使得计算机执行如权利要求13至20任一项所述的方法；或者，所述计算机程序使得计算机执行如权利要求41至48任一项所述的方法。
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