WO2023011107A1 - 会话策略控制方法、网元、存储介质和电子设备 - Google Patents

会话策略控制方法、网元、存储介质和电子设备 Download PDF

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Publication number
WO2023011107A1
WO2023011107A1 PCT/CN2022/104618 CN2022104618W WO2023011107A1 WO 2023011107 A1 WO2023011107 A1 WO 2023011107A1 CN 2022104618 W CN2022104618 W CN 2022104618W WO 2023011107 A1 WO2023011107 A1 WO 2023011107A1
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Prior art keywords
policy control
pdu session
information
control information
session policy
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PCT/CN2022/104618
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English (en)
French (fr)
Inventor
孙悦
龙彪
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中国电信股份有限公司
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Publication of WO2023011107A1 publication Critical patent/WO2023011107A1/zh

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    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present disclosure relates to the technical field of mobile communication, and more specifically, to a session policy control method, a network element, a storage medium, and an electronic device.
  • Mobile communication is a modern technology for wireless communication.
  • mobile communication technology has entered the era of the fifth generation of technology development through the development of the first generation, second generation, third generation and fourth generation technology.
  • 3GPP 3rd Generation Partnership Project
  • 3GPP 3rd Generation Partnership Project
  • the PDU (Protocol Data Unit, protocol data unit) session provides data connectivity between the UE (User Equipment, user terminal) and the DN (Data Network, data network), and all data flows of the UE need to pass through
  • the PDU session is carried, that is, the establishment of a PDU session is one of the important means for mobile communication.
  • a session policy control method is provided, which is applied to the policy control function PCF, including: receiving a PDU session establishment request, the PDU session establishment request is initiated by a roaming terminal and carries a public land mobile network PLMN identification information; according to the identification information, determine the target PDU session policy control information from the pre-stored PDU session policy control information, and the PDU session policy control information is based on the visited network to which the PCF belongs and the roaming terminal to which The PLMN dimension information established by the SLA information between the home networks; and, sending the target PDU session policy control information to the session management function SMF, so that the SMF creates the target PDU session policy control information according to the target PDU session policy control information PDU sessions for roaming terminals.
  • the PDU session policy control information is stored or configured in the PCF or the unified data storage function UDR in a PLMN dimension.
  • the PDU session policy control information is stored or configured in the PCF in a PLMN dimension; the corresponding target is obtained from the pre-stored PDU session policy control information according to the identification information
  • the PDU session policy control information includes: determining the target PDU session policy control information according to the pre-stored correspondence between the PDU session policy control information and the identification information.
  • the PDU session policy control information is stored or configured in the UDR in the PLMN dimension; and, according to the identification information, the corresponding target is obtained from the pre-stored PDU session policy control information PDU session policy control information, including: sending a policy information acquisition request to the UDR, the policy information acquisition request carrying the identification information; receiving the correspondence between the pre-stored PDU session policy control information and the identification information returned by the UDR The target PDU session policy control information identified by the relationship.
  • the PDU session policy control information includes at least one of allowed services, guaranteed bit rate control information, slice control information or charging information.
  • the PDU session policy control information of the PLMN dimension established based on the SLA information between the visited network and the home network to which the roaming terminal belongs includes multiple information sets, so The information set corresponds to the user category of the terminal; and, according to the identification information, obtaining the corresponding target PDU session policy control information from the pre-stored PDU session policy control information includes: according to the PDU session establishment request carried User identification, determining the user category of the roaming terminal; determining target PDU session policy control information corresponding to the identification information from the information set corresponding to the user category.
  • the PCF is a policy control function V-PCF of the visited network of the roaming terminal.
  • a network element is provided, the network element is a PCF, including: a receiving unit, configured to receive a PDU session establishment request, the PDU session establishment request is initiated by a roaming terminal and carries a PLMN Identification information; an information determination unit, configured to obtain corresponding target PDU session policy control information from pre-stored PDU session policy control information according to the identification information, and the PDU session policy control information is based on the visiting location to which the PCF belongs Information of the PLMN dimension established by the SLA information between the network and the home network to which the roaming terminal belongs; and an information sending unit, configured to send the target PDU session policy control information to the SMF.
  • a receiving unit configured to receive a PDU session establishment request, the PDU session establishment request is initiated by a roaming terminal and carries a PLMN Identification information
  • an information determination unit configured to obtain corresponding target PDU session policy control information from pre-stored PDU session policy control information according to the identification information, and the PDU session policy control information is based on the visiting
  • the PCF further includes: a storage unit, storing or configuring the PLMN dimension based on the SLA information establishment between the visited network and the home network to which the roaming terminal belongs. PDU session policy control information.
  • the PCF further includes: a policy information acquisition unit, configured to send a policy information acquisition request to the UDR, where the policy information acquisition request carries the identification information, wherein the UDR
  • the PDU session policy control information of the PLMN dimension is stored or configured in the PLMN dimension; the policy information receiving unit is used to receive the target PDU session policy control information determined according to the corresponding relationship between the pre-stored PDU session policy control information and the identification information returned by the UDR .
  • a non-transitory computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the session policy control method described in any one of the above is implemented.
  • an electronic device including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform The session policy control method described in any one of the above.
  • a computer program including: instructions, which when executed by a processor cause the processor to execute the session policy control method described in any one of the above.
  • a non-transitory computer program product including instructions, which, when executed by a processor, cause the processor to execute the session policy control method described in any one of the above.
  • FIG. 1 shows a flowchart of a session policy control method according to an exemplary embodiment of the present disclosure
  • FIG. 2 shows a flow chart of acquiring target PDU session policy control information according to an exemplary embodiment of the present disclosure
  • Fig. 3 shows a flow chart of establishing a PDU session according to an exemplary embodiment of the present disclosure
  • Fig. 4 shows a schematic structural diagram of a PCF according to an exemplary embodiment of the present disclosure
  • Fig. 5 shows a schematic structural diagram of a PCF according to an exemplary embodiment of the present disclosure
  • FIG. 6 shows a schematic structural diagram of a PCF according to an exemplary embodiment of the present disclosure
  • FIG. 7 shows a schematic diagram of a storage medium according to an exemplary embodiment of the present disclosure.
  • FIG. 8 shows a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.
  • the session policy information obtained by the roaming UE is generated by initiating a PDU session establishment request and delivered directly, rather than by the roaming UE. Acquiring the required session policy information in a targeted manner cannot truly meet the resource requirements of the roaming UE, resulting in a bad experience for the roaming terminal to access the visited network. For example, there are situations where the guaranteed bit rate rate of a roaming UE may not be met, thus degrading the user experience of the roaming user on the visited network.
  • control policy information for roaming users can be formulated based on cooperation agreements between different operators, but there is no practical solution for which policy information and how to distribute the policy information required by roaming terminals.
  • a session policy control method is firstly provided.
  • the session policy control method includes the following steps S110-S130.
  • Step S110 Receive a PDU session establishment request, the PDU session establishment request is initiated by a roaming terminal and carries identification information of a Public Land Mobile Network (PLMN for short);
  • PLMN Public Land Mobile Network
  • Step S120 According to the identification information, obtain the corresponding target PDU session policy control information from the pre-stored PDU session policy control information, wherein the PDU session policy control information is based on the relationship between the visited network to which the PCF belongs and the home network to which the roaming terminal belongs.
  • Step S130 Send the target PDU session policy control information to the session management function SMF, so that the SMF creates a PDU session for the roaming terminal according to the target PDU session policy control information.
  • the PDU session policy is based on the PLMN dimension information established based on the SLA information between the visited network and the home network to which the roaming terminal belongs, and is stored or configured in the PLMN dimension , different from the previous method of directly issuing policies, when the roaming terminal in the present disclosure visits the visited network, it can accurately obtain the session policy control information of the PLMN dimension corresponding to the identification information in the visited network, so that the roaming terminal can obtain the required network data Resources, etc., so as to improve the access experience of the roaming terminal in the roaming network.
  • the session policy control method in the exemplary embodiment of the present disclosure will be further described below with reference to FIG. 1 , and the method is applied to a visited PCF (Policy Control Function, policy control function), that is, V-PCF (Visited PCF).
  • Policy Control Function Policy Control Function
  • V-PCF Vehicle PCF
  • step S110 a PDU session establishment request is received.
  • the PCF is a unified policy framework that provides policy rules for control plane functions
  • the PDU session provides data between UE and DN in 5G (5th Generation Mobile Technology, fifth-generation mobile communication technology) Connectivity
  • 5G Fifth Generation Mobile Technology, fifth-generation mobile communication technology
  • all data streams of the UE need to be carried by PDU sessions, that is, before the UE sends data traffic, a PDU session should be established first, and after the DN receives the request from the UE and allocates the corresponding control plane and data plane resources, the UE can communicate with Transfer data between DNs.
  • 5G Fifth Generation Mobile Technology, fifth-generation mobile communication technology
  • the PDU session establishment request in this disclosure is initiated by the roaming terminal and carries PLMN identification information, wherein the PDU session establishment request includes but not limited to slice information, DNN (Data Network Name, data network name) information or user identification of the roaming terminal, etc.
  • a roaming terminal may be a device connected to a network infrastructure through a wireless interface, such as a mobile phone, a smart phone or other such devices that may be classified as User Equipment (UE).
  • UE User Equipment
  • the PDU session establishment request is initiated by the roaming terminal and passed through RAN (Radio Access Network, wireless access network), AMF (Access and Mobility Management Function, access and mobility management function), UPF (User Plane Function, user plane function) and SMF (Session Management Function, session management function), the PDU session establishment request is sent to PCF.
  • RAN Radio Access Network, wireless access network
  • AMF Access and Mobility Management Function, access and mobility management function
  • UPF User Plane Function, user plane function
  • SMF Session Management Function, session management function
  • Step S120 obtain the corresponding target PDU session policy control information from the pre-stored PDU session policy control information.
  • the PDU session policy control information (including target PDU session policy control information) is based on the SLA (Service Level Agreement, service level) between the visited network VPLMN and the home network HPLMN to which the roaming terminal belongs. protocol) information to establish session policy control information, and the PDU session policy control information is stored or configured in the PLMN dimension.
  • the PDU session policy control information in this application includes but not limited to at least one of allowed services, guaranteed bit rate control information, slice control information or charging information.
  • the PDU session policy control information can be stored or configured in the PCF in the dimension of the PLMN, and the PCF receives the PDU initiated by the roaming terminal
  • the target PDU session policy control information corresponding to the identification information is directly determined according to the pre-stored correspondence between the PDU session policy control information and the identification information.
  • the PDU session policy control information can be stored or configured in a UDR (Unified Data Repository, unified data warehouse function) with the PLMN dimension
  • UDR Unified Data Repository, unified data warehouse function
  • the PCF After receiving the PDU session establishment request, the PCF first sends a policy information acquisition request to the UDR, and the policy information acquisition request carries the identification information; then receives the target PDU session policy control information returned by the UDR, and the target PDU session The policy control information is determined according to the pre-stored correspondence between PDU session policy control information and identification information.
  • the PDU session policy control information corresponding to a certain HPLMN-1 is stored or configured in the V-PCF (or V-UDR, namely Visited UDR, UDR of the visited place) in the PLMN dimension, when the V-PCF according to the roaming terminal
  • the PDU session establishment request initiated by (belonging to the HPLMN-1 network) obtains the PDU session policy control information, it is obtained from the PDU session policy control information corresponding to HPLMN-1, without involving the user dimension or the PDU session dimension.
  • the PDU session policy control information established based on the SLA information between the visited network and the home network to which the roaming terminal belongs is stored or configured in the PCF or UDR of the visited site in the PLMN dimension, so that the roaming terminal can access the visited site During the network, the corresponding PDU session policy control information is accurately obtained based on the identification information, so that the roaming terminal can obtain the required network data and other resources, thereby improving the access experience of the roaming terminal in the roaming network.
  • the PLMN dimension session policy control information established based on the SLA information between the visited network VPLMN and the home network HPLMN to which the roaming terminal belongs in this disclosure is directly stored or configured in the PCF (V-PCF) or In URD (V-UDR).
  • the established PDU session policy control information can be divided into multiple information sets, and each information set corresponds to a different user category, that is, the PDU
  • the session policy control information includes multiple information sets, and any information set corresponds to the user category of the terminal.
  • Fig. 2 shows a flow chart of obtaining target PDU session policy control information according to an exemplary embodiment of the present disclosure. As shown in Fig.
  • the target PDU session policy control information is obtained from the pre-stored PDU session policy control information
  • the method includes the following steps: in step S210, according to the user identification carried in the PDU session establishment request, determine the user category of the roaming terminal, for example, users can be divided into gold users, silver users and bronze users according to actual needs; in step S220, from The target PDU session policy control information corresponding to the identification information is obtained from the information set corresponding to the user category.
  • differentiated services can be provided for different users, thereby ensuring the use experience of various users.
  • step S130 the target PDU session policy control information is sent to the SMF.
  • the PCF delivers the obtained target PDU session policy control information to the SMF, so that the PDU session of the roaming terminal is subsequently established according to the PDU session policy control information.
  • Fig. 3 shows a flow chart of establishing a PDU session according to an exemplary embodiment of the present disclosure, wherein the PDU session policy control information is stored or configured in the UDR, and the PCF is the policy control function V-PCF of the visited network, which is combined below Fig. 3 illustrates the PDU session establishment process of the present disclosure:
  • step S310 the UE initiates a PDU session establishment request to the AMF, and the PDU session establishment request carries identification information of the PLMN;
  • step S320 the SMF is selected by the AMF, and a session establishment request is sent to the SMF, and the SMF selects a UPF to authorize and authenticate the PDU session establishment request;
  • step S330 the SMF sends the session establishment request response information to the AMF;
  • step S340 the SMF selects the PCF, and sends the PDU session establishment request to the PCF;
  • step S350 the PCF sends a policy information acquisition request to the UDR, and receives the target PDU session policy control information determined by the corresponding relationship between the pre-stored PDU session policy control information and the identification information returned by the UDR;
  • step S360 the PCF sends the target PDU session policy control information to the SMF, so that the SMF sends the target PDU session policy control information to the UPF and sends the PDU session establishment request to the AMF, so that the AMF notifies the base station to establish a radio bearer, thereby The process of allocating bearers through wireless, notifying SMF tunnel information, and notifying UPF downlink tunnel information through SMF is performed, thereby establishing the PDU session of the roaming terminal.
  • the PCF determines the corresponding target PDU session policy control information according to the PLMN identification information carried in the received PDU session establishment request, and forwards it to the SMF, so that based on the obtained target
  • the PDU session policy control information establishes the PDU session of the roaming terminal.
  • the PDU session policy is established based on the SLA information between the visited network and the home network to which the roaming terminal belongs, and is stored or configured in a PLMN dimension.
  • the roaming terminal in the present disclosure visits the visited network, it can accurately obtain the session policy control information corresponding to the identification information in the visited network, so that the roaming terminal can obtain the required network data resources, etc., thereby Improve the access experience of roaming terminals in the roaming network.
  • a network element is also provided, and the network element is a PCF.
  • the PCF 400 may include a receiving unit 410, an information determining unit 420, and an information sending unit 430. specifically,
  • the receiving unit 410 is configured to receive a PDU session establishment request, the PDU session establishment request is initiated by a roaming terminal and carries identification information of the PLMN;
  • the information determining unit 420 is configured to obtain corresponding target PDU session policy control information from pre-stored PDU session policy control information according to the identification information, wherein the PDU session policy control information is based on the visited network to which the PCF belongs and the network to which the roaming terminal belongs.
  • the information sending unit 430 is configured to send target PDU session policy control information to the SMF.
  • the PCF of the present disclosure may further include:
  • the storage unit 440 is configured to store or configure PDU session policy control information based on the SLA information between the visited network and the home network to which the roaming terminal belongs in the PLMN dimension.
  • the PCF of the present disclosure may include:
  • the policy information acquisition unit 450 is configured to send a policy information acquisition request to the UDR, where the policy information acquisition request carries identification information, wherein the PDU session policy control information of the PLMN dimension is stored or configured in the UDR;
  • the policy information receiving unit 460 is configured to receive the target PDU session policy control information returned by the UDR and determined according to the pre-stored correspondence between the PDU session policy control information and the identification information.
  • a computer storage medium capable of implementing the above method is also provided.
  • Program products capable of realizing the above-mentioned methods in this specification are stored thereon.
  • various aspects of the present disclosure may also be implemented in the form of a program product, which includes program code, and when the program product is run on a terminal device, the program code is used to make the The terminal device executes the steps according to various exemplary embodiments of the present disclosure described in the "Exemplary Method" section above in this specification.
  • a program product 700 for implementing the above method according to an exemplary embodiment of the present disclosure is described, which may adopt a portable compact disc read-only memory (CD-ROM) and include program codes, and may be used on a terminal devices, such as personal computers.
  • CD-ROM portable compact disc read-only memory
  • the program product of the present disclosure is not limited thereto.
  • a readable storage medium may be any tangible medium containing or storing a program, and the program may be used by or in combination with an instruction execution system, apparatus or device.
  • the program product may reside on any combination of one or more readable media.
  • the readable medium may be a readable signal medium or a readable storage medium.
  • the readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: electrical connection with one or more conductors, portable disk, hard disk, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.
  • a computer readable signal medium may include a data signal carrying readable program code in baseband or as part of a carrier wave. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing.
  • a readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.
  • Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
  • Program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural Programming language - such as "C" or a similar programming language.
  • the program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server to execute.
  • the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider). business to connect via the Internet).
  • LAN local area network
  • WAN wide area network
  • Internet service provider e.g., a wide area network
  • an electronic device capable of implementing the above method is also provided.
  • a complete hardware embodiment a complete software embodiment (including firmware, microcode, etc.), or an embodiment combining hardware and software aspects, which may be collectively referred to herein as "circuit", “module” or "system”.
  • FIG. 8 An electronic device 800 according to such an embodiment of the present disclosure is described below with reference to FIG. 8 .
  • the electronic device 800 shown in FIG. 8 is only an example, and should not limit the functions and application scope of the embodiments of the present disclosure.
  • electronic device 800 takes the form of a general-purpose computing device.
  • the components of the electronic device 800 may include, but are not limited to: at least one processing unit 810, at least one storage unit 820, a bus 830 connecting different system components (including the storage unit 820 and the processing unit 810), and a display unit 840.
  • the storage unit stores program codes, and the program codes can be executed by the processing unit 810, so that the processing unit 810 executes various exemplary methods according to the present disclosure described in the "Exemplary Methods" section of this specification. Example steps.
  • the storage unit 820 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 8201 and/or a cache storage unit 8202 , and may further include a read-only storage unit (ROM) 8203 .
  • RAM random access storage unit
  • ROM read-only storage unit
  • Storage unit 820 may also include programs/utilities 8204 having a set (at least one) of program modules 8205, such program modules 8205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, Implementations of networked environments may be included in each or some combination of these examples.
  • Bus 830 may represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local area using any of a variety of bus structures. bus.
  • the electronic device 800 can also communicate with one or more external devices 900 (such as keyboards, pointing devices, Bluetooth devices, etc.), and can also communicate with one or more devices that enable the user to interact with the electronic device 800, and/or communicate with Any device (eg, router, modem, etc.) that enables the electronic device 800 to communicate with one or more other computing devices. Such communication may occur through input/output (I/O) interface 850 .
  • the electronic device 800 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN) and/or a public network such as the Internet) through the network adapter 860 . As shown, network adapter 860 communicates with other modules of electronic device 800 via bus 830 .
  • other hardware and/or software modules may be used in conjunction with electronic device 800, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives And data backup storage system, etc.
  • the exemplary embodiments described here can be implemented by software, or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of software products, and the software products can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.) or on the network , including several instructions to make a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) execute the method according to the embodiment of the present disclosure.
  • a computing device which may be a personal computer, a server, a terminal device, or a network device, etc.

Abstract

一种会话策略控制方法、网元、存储介质和电子设备，包括：策略控制功能PCF接收协议数据单元PDU会话建立请求，PDU会话建立请求为漫游终端发起的、且携带有公众陆地移动网PLMN的标识信息；根据标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，PDU会话策略控制信息是基于PCF所属的拜访地网络和漫游终端所属的归属地网络之间的服务级别协议SLA信息建立的PLMN维度的信息；和，向会话管理功能SMF发送目标PDU会话策略控制信息，以使SMF根据目标PDU会话策略控制信息创建漫游终端的PDU会话。

Description

会话策略控制方法、网元、存储介质和电子设备
相关申请的交叉引用
本申请是以CN申请号为202110902594.5，申请日为2021年8月6日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及移动通信技术领域，更具体地，涉及一种会话策略控制方法、网元、存储介质和电子设备。
背景技术
移动通信是进行无线通信的现代化技术。作为计算机与移动互联网发展的重要成果之一，移动通信技术经过第一代、第二代、第三代和第四代技术的发展，目前已迈入第五代技术发展的时代。而由于通信系统本身异常庞大繁琐，3GPP(3rd Generation Partnership Project,第三代合作伙伴计划)通过设置3个技术规范组来处理移动通信中的不同技术，分别为无线接入网、核心网和终端、及业务和系统。在核心网和终端中，PDU(Protocol Data Unit,协议数据单元)会话提供UE(User Equipment,用户终端)与DN(Data Network,数据网络)之间的数据连通性，UE的所有数据流需经由PDU会话来承载，即建立PDU会话是进行移动通信的重要手段之一。
发明内容
根据本公开的一个方面，提供一种会话策略控制方法，应用于策略控制功能PCF，包括：接收PDU会话建立请求，所述PDU会话建立请求为漫游终端发起的、且携带有公众陆地移动网PLMN的标识信息；根据所述标识信息，从预存的PDU会话策略控制信息中确定目标PDU会话策略控制信息，所述PDU会话策略控制信息是基于所述PCF所属的拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PLMN维度的信息；和，向会话管理功能SMF发送所述目标PDU会话策略控制信息，以使所述SMF根据所述目标PDU会话策略控制信息创建所述漫游终端的PDU会话。
在本公开的一种示例性实施例中，PDU会话策略控制信息以PLMN维度存储或配置于所述PCF或者统一数据仓储功能UDR中。
在本公开的一种示例性实施例中，PDU会话策略控制信息以PLMN维度存储或配置于所述PCF中；所述根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，包括：根据预存的PDU会话策略控制信息与标识信息的对应关系，确定所述目标PDU会话策略控制信息。
在本公开的一种示例性实施例中，PDU会话策略控制信息以PLMN维度存储或配置于UDR中；并且，所述根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，包括：向所述UDR发送策略信息获取请求，所述策略信息获取请求携带有所述标识信息；接收所述UDR返回的根据预存的PDU会话策略控制信息与标识信息的对应关系所确定的目标PDU会话策略控制信息。
在本公开的一种示例性实施例中，所述PDU会话策略控制信息包括允许的业务、保证比特速率控制信息、切片控制信息或计费信息中的至少一种。
在本公开的一种示例性实施例中，所述基于拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PLMN维度的PDU会话策略控制信息包括多个信息集合，所述信息集合与终端的用户类别对应；并且，所述根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，包括：根据所述PDU会话建立请求携带的用户标识，确定所述漫游终端的用户类别；从所述用户类别对应的信息集合中确定所述标识信息对应的目标PDU会话策略控制信息。
在本公开的一种示例性实施例中，所述PCF为所述漫游终端的拜访地网络的策略控制功能V-PCF。
根据本公开的一个方面，提供一种网元，所述网元为PCF，包括：接收单元，用于接收PDU会话建立请求，所述PDU会话建立请求为漫游终端发起的、且携带有PLMN的标识信息；信息确定单元，用于根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，所述PDU会话策略控制信息是基于所述PCF所属的拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PLMN维度的信息；和，信息发送单元，用于向SMF发送所述目标PDU会话策略控制信息。
在本公开的一种示例性实施例中，所述PCF还包括：存储单元，存储或配置有PLMN维度的所述基于拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PDU会话策略控制信息。
在本公开的一种示例性实施例中，所述PCF还包括：策略信息获取单元，用于向 UDR发送策略信息获取请求，所述策略信息获取请求携带有所述标识信息，其中所述UDR中存储或配置有PLMN维度的PDU会话策略控制信息；策略信息接收单元，用于接收所述UDR返回的根据预存的PDU会话策略控制信息与标识信息的对应关系所确定的目标PDU会话策略控制信息。
根据本公开的一个方面，提供一种非瞬时性的计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述任意一项所述的会话策略控制方法。
根据本公开的一个方面，提供一种电子设备，包括：处理器；以及存储器，用于存储所述处理器的可执行指令；其中，所述处理器配置为经由执行所述可执行指令来执行上述任意一项所述的会话策略控制方法。
根据本公开的一个方面，提供一种计算机程序，包括：指令，所述指令当由处理器执行时使所述处理器执行上述任意一项所述的会话策略控制方法。
根据本公开的一个方面，提供一种非瞬时性计算机程序产品，包括指令，所述指令当由处理器执行时使所述处理器执行上述任意一项所述的会话策略控制方法。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
通过参考附图阅读下文的详细描述，本公开示例性实施方式的上述以及其他目的、特征和优点将变得易于理解。在附图中，以示例性而非限制性的方式示出了本公开的若干实施方式，其中：
图1示出了根据本公开示例性实施例的会话策略控制方法的流程图；
图2示出了根据本公开示例性实施例的获取目标PDU会话策略控制信息的流程图；
图3示出了根据本公开示例性实施例的一种PDU会话建立流程图；
图4示出了根据本公开示例性实施例的一种PCF的结构示意图；
图5示出了根据本公开示例性实施例的一种PCF的结构示意图；
图6示出了根据本公开示例性实施例的一种PCF的结构示意图；
图7示出了根据本公开示例性实施例的存储介质的示意图；以及
图8示出了根据本公开示例性实施例的电子设备的框图。
在附图中，相同或对应的标号表示相同或对应的部分。
具体实施方式
现在将参考附图更全面地描述示例性实施方式。然而，示例性实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些实施例使得本公开将更加全面和完整，并将示例性实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
此外，所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本公开的实施例的充分理解。然而，本领域技术人员将意识到，可以实践本公开的技术方案而没有所述特定细节中的一个或更多，或者可以采用其它的方法、组元、装置、步骤等。在其它情况下，不详细示出或描述公知结构、方法、装置、实现或者操作以避免模糊本公开的各方面。
附图中所示的方框图仅仅是功能实体，不一定必须与物理上独立的实体相对应。即，可以采用软件形式来实现这些功能实体，或在一个或多个软件硬化的模块中实现这些功能实体或功能实体的一部分，或在不同网络和/或处理器装置和/或微控制器装置中实现这些功能实体。
在本领域的相关技术中，在LBO(Local Breakout,本地疏导)漫游场景中，由于漫游UE得到的会话策略信息是通过发起PDU会话建立请求而产生并直接下发的，而不是由漫游UE有针对性地获取所需的会话策略信息，无法真正满足漫游UE的资源等需求，从而导致漫游终端访问拜访地网络的体验感不好。例如，存在漫游UE的保证比特率速率可能得不到满足的情况，因此降低了漫游用户在拜访地网络的用户体验。目前3GPP规范中可以基于不同运营商间的合作协议制定漫游用户的控制策略信息，而具体哪些策略信息、如何下发漫游终端所需的策略信息并没有实际解决方案。
基于此，在本公开示例性实施例中，首先提供了一种会话策略控制方法。参考图1所示，该会话策略控制方法包括以下步骤S110-S130。
步骤S110：接收PDU会话建立请求，PDU会话建立请求为漫游终端发起的、且携带有公众陆地移动网(Public Land Mobile Network，简称：PLMN)的标识信息；
步骤S120：根据标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，其中PDU会话策略控制信息是基于PCF所属的拜访地网络和漫游终端所属的归属地网络之间的SLA信息建立的PLMN维度的信息；
步骤S130：向会话管理功能SMF发送目标PDU会话策略控制信息，以使所述SMF根据目标PDU会话策略控制信息创建漫游终端的PDU会话。
根据本示例实施例中的会话策略控制方法，PDU会话策略是基于拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PLMN维度的信息，并且以PLMN维度进行存储或配置，不同于以往直接下发策略的方式，本公开漫游终端在访问拜访地网络时，能够在拜访地网络准确获取标识信息对应的PLMN维度的会话策略控制信息，使漫游终端得到所需的网络数据资源等，从而提高漫游终端在漫游地网络的访问体验。
下面将结合图1，对本公开示例性实施例中的会话策略控制方法进行进一步的说明，该方法应用于拜访地的PCF(Policy Control Function，策略控制功能)，即V-PCF(Visited PCF)。
在步骤S110中，接收PDU会话建立请求。
在本公开的示例性实施例中，PCF为统一的政策框架，提供控制平面功能的策略规则，PDU会话为5G(5th Generation Mobile Technology,第五代移动通信技术)中UE与DN之间提供数据连通性，UE所有的数据流需经由PDU会话来承载，即UE发送数据流量之前，应该先建立PDU会话，而DN接收UE的请求并分配相应的控制面和数据面资源后，UE才可以与DN之间传输数据。本公开的PDU会话建立请求由漫游终端发起且携带有PLMN的标识信息，其中，PDU会话建立请求包括但不限于切片信息、DNN(Data Network Name,数据网络名称)信息或漫游终端的用户标识等，漫游终端可以是通过无线接口连接至网络基础设施的设备，例如移动电话、智能电话或其他可被分类为用户设备(UE)的此类设备。
需要说明的是，PDU会话建立请求是由漫游终端发起，并经由RAN(Radio Access Network，无线接入网)、AMF(Access and Mobility Management Function，接入和移动性管理功能)、UPF(User Plane Function，用户面功能)和SMF(Session Management Function，会话管理功能)之间的交互，PDU会话建立请求被发送至PCF。而PCF接收PDU会话建立请求之前的处理过程，与现有技术中建立PDU会话的过程相同，对此不再赘述。
步骤S120，根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息。
在本公开的示例性实施例中，PDU会话策略控制信息(包括目标PDU会话策略 控制信息)是基于拜访地网络VPLMN和漫游终端所属的归属地网络HPLMN之间的SLA(Service Level Agreement,服务级别协议)信息建立的会话策略控制信息，并且该PDU会话策略控制信息是以PLMN维度存储或配置的。本申请的PDU会话策略控制信息包括但不限于允许的业务、保证比特速率控制信息、切片控制信息或计费信息中的至少一种。
在一些实施例中，在基于VPLMN与HPLMN之间的SLA信息建立会话策略控制信息后，可以将PDU会话策略控制信息以PLMN维度存储或配置于PCF中，则PCF在接收到漫游终端发起的PDU会话建立请求后，直接根据预存的PDU会话策略控制信息与标识信息的对应关系，确定该标识信息对应的目标PDU会话策略控制信息。
在一些实施例中，在基于VPLMN与HPLMN之间的SLA信息建立会话策略控制信息后，可以将PDU会话策略控制信息以PLMN维度存储或配置于UDR(Unified Data Repository，统一数据仓储功能)中，那么PCF在接收到PDU会话建立请求后，首先向UDR发送策略信息获取请求，且该策略信息获取请求携带有所述的标识信息；然后接收UDR返回的目标PDU会话策略控制信息，该目标PDU会话策略控制信息是根据预存的PDU会话策略控制信息与标识信息的对应关系所确定的。
举例而言，若某一HPLMN-1对应的PDU会话策略控制信息以PLMN维度存储或配置在V-PCF(或V-UDR，即Visited UDR，拜访地的UDR)，当V-PCF根据漫游终端(属于HPLMN-1网络)发起的PDU会话建立请求获取PDU会话策略控制信息时，是到HPLMN-1所对应的PDU会话策略控制信息中获取，而不会涉及用户维度或PDU会话维度。
基于此，将基于拜访地网络和漫游终端所属的归属地网络之间的SLA信息建立的PDU会话策略控制信息，以PLMN维度存储或配置于拜访地PCF或UDR中，能够在漫游终端访问拜访地网络时，基于标识信息准确获得对应的PDU会话策略控制信息，使漫游终端得到所需的网络数据等资源，从而提高漫游终端在漫游地网络的访问体验。
需要说明的是，本公开中的基于拜访地网络VPLMN和漫游终端所属的归属地网络HPLMN之间的SLA信息建立的PLMN维度的会话策略控制信息是直接存储或配置在PCF(V-PCF)或URD(V-UDR)中的。
进一步的，在本公开的示例性实施例中，可以在VPLMN与HPLMN进行签约时， 将建立的PDU会话策略控制信息分为多个信息集合，且各信息集合对应于不同的用户类别，即PDU会话策略控制信息包括多个信息集合，任一信息集合与终端的用户类别对应。图2示出了根据本公开示例性实施例的获取目标PDU会话策略控制信息的流程图，如图2所示，根据标识信息，从预存的PDU会话策略控制信息中获取目标PDU会话策略控制信息包括如下步骤：在步骤S210中，根据PDU会话建立请求携带的用户标识，确定漫游终端的用户类别，例如可以根据实际需求将用户分为金牌用户、银牌用户和铜牌用户；在步骤S220中，从用户类别对应的信息集合中获取标识信息对应的目标PDU会话策略控制信息。
通过划分不同的用户类别，并将各用户类别分别与不同的PDU会话策略控制信息对应，能够为不同用户提供差异化服务，从而保证各类用户的使用体验。
在步骤S130中，向SMF发送目标PDU会话策略控制信息。
在本公开的示例性实施例中，PCF将获得的目标PDU会话策略控制信息下发至SMF，从而后续根据该PDU会话策略控制信息建立漫游终端的PDU会话。
图3示出了根据本公开示例性实施例的一种PDU会话建立流程图，其中将PDU会话策略控制信息存储或配置于UDR中，PCF为拜访地网络的策略控制功能V-PCF，下面结合图3对本公开的PDU会话建立过程进行阐述：
在步骤S310中，UE发起PDU会话建立请求至AMF，该PDU会话建立请求中携带有PLMN的标识信息；
在步骤S320中，通过AMF选择SMF，并发送会话建立请求至SMF，SMF选择UPF，以对该PDU会话建立请求进行授权和认证；
在步骤S330中，SMF向AMF发送会话建立请求响应信息；
在步骤S340中，SMF选择PCF，并向PCF发送该PDU会话建立请求；
在步骤S350中，PCF向UDR发送策略信息获取请求，并接收UDR返回的根据预存的PDU会话策略控制信息与标识信息的对应关系所确定的目标PDU会话策略控制信息；
在步骤S360中，PCF发送该目标PDU会话策略控制信息至SMF，从而使SMF将目标PDU会话策略控制信息下发至UPF以及将PDU会话建立请求发送至AMF，使AMF通知基站建立无线承载，从而执行通过无线分配承载、通知SMF隧道信息、通过SMF通知UPF下行隧道信息等过程，从而建立了漫游终端的PDU会话。
需要说明的是，PCF发送该目标PDU会话策略控制信息至SMF后的处理过程， 与现有技术中PDU会话建立过程相同，本公开对此不再赘述。
本公开的示例性实施例中的会话策略控制方法，PCF根据接收到的PDU会话建立请求中携带的PLMN标识信息，确定对应的目标PDU会话策略控制信息，并转发至SMF，从而基于得到的目标PDU会话策略控制信息建立漫游终端的PDU会话。PDU会话策略是基于拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的，并且以PLMN维度进行存储或配置的。不同于以往直接下发策略的方式，本公开漫游终端在访问拜访地网络时，能够在拜访地网络准确获取标识信息对应的会话策略控制信息，使漫游终端得到所需的网络数据资源等，从而提高漫游终端在漫游地网络的访问体验。
此外，在本公开的示例性实施例中，还提供了一种网元，该网元为PCF。参考图4所示，该PCF 400可以包括接收单元410、信息确定单元420、以及信息发送单元430。具体地，
接收单元410，用于接收PDU会话建立请求，该PDU会话建立请求为漫游终端发起的、且携带有PLMN的标识信息；
信息确定单元420，用于根据标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，其中PDU会话策略控制信息是基于所述PCF所属的拜访地网络和漫游终端所属的归属地网络之间的SLA信息建立的PLMN维度的信息；
信息发送单元430，用于向SMF发送目标PDU会话策略控制信息。
在本公开的一示例性实施例中，参见图5，本公开的PCF还可以包括：
存储单元440，存储或配置有PLMN维度的基于拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PDU会话策略控制信息。
在本公开的一示例性实施例中，参见图6，本公开的PCF可以包括：
策略信息获取单元450，用于向UDR发送策略信息获取请求，策略信息获取请求携带有标识信息，其中UDR中存储或配置有PLMN维度的PDU会话策略控制信息；
策略信息接收单元460，用于接收UDR返回的根据预存的PDU会话策略控制信息与标识信息的对应关系所确定的目标PDU会话策略控制信息。
由于本公开的示例性实施例的PCF中的各个功能模块(单元)的具体细节在上述会话策略控制方法的发明实施例中已经详细说明，因此不再赘述。
应当注意，尽管在上文详细描述中提及了PCF的若干模块或者单元，但是这种划 分并非强制性的。实际上，根据本公开的实施方式，上文描述的两个或更多模块或者单元的特征和功能可以在一个模块或者单元中具体化。反之，上文描述的一个模块或者单元的特征和功能可以进一步划分为由多个模块或者单元来具体化。
此外，在本公开示例性实施方式中，还提供了一种能够实现上述方法的计算机存储介质。其上存储有能够实现本说明书上述方法的程序产品。在一些可能的实施例中，本公开的各个方面还可以实现为一种程序产品的形式，其包括程序代码，当所述程序产品在终端设备上运行时，所述程序代码用于使所述终端设备执行本说明书上述“示例性方法”部分中描述的根据本公开各种示例性实施例的步骤。
参考图7所示，描述了根据本公开的示例性实施方式的用于实现上述方法的程序产品700，其可以采用便携式紧凑盘只读存储器(CD-ROM)并包括程序代码，并可以在终端设备，例如个人电脑上运行。然而，本公开的程序产品不限于此，在本文件中，可读存储介质可以是任何包含或存储程序的有形介质，该程序可以被指令执行系统、装置或者器件使用或者与其结合使用。
所述程序产品可以采用一个或多个可读介质的任意组合。可读介质可以是可读信号介质或者可读存储介质。可读存储介质例如可以为但不限于电、磁、光、电磁、红外线、或半导体的系统、装置或器件，或者任意以上的组合。可读存储介质的更具体的例子(非穷举的列表)包括：具有一个或多个导线的电连接、便携式盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、光纤、便携式紧凑盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。
计算机可读信号介质可以包括在基带中或者作为载波一部分传播的数据信号，其中承载了可读程序代码。这种传播的数据信号可以采用多种形式，包括但不限于电磁信号、光信号或上述的任意合适的组合。可读信号介质还可以是可读存储介质以外的任何可读介质，该可读介质可以发送、传播或者传输用于由指令执行系统、装置或者器件使用或者与其结合使用的程序。
可读介质上包含的程序代码可以用任何适当的介质传输，包括但不限于无线、有线、光缆、RF等等，或者上述的任意合适的组合。
可以以一种或多种程序设计语言的任意组合来编写用于执行本公开操作的程序代码，所述程序设计语言包括面向对象的程序设计语言—诸如Java、C++等，还包括常规的过程式程序设计语言—诸如“C”语言或类似的程序设计语言。程序代码可以 完全地在用户计算设备上执行、部分地在用户设备上执行、作为一个独立的软件包执行、部分在用户计算设备上部分在远程计算设备上执行、或者完全在远程计算设备或服务器上执行。在涉及远程计算设备的情形中，远程计算设备可以通过任意种类的网络，包括局域网(LAN)或广域网(WAN)，连接到用户计算设备，或者，可以连接到外部计算设备(例如利用因特网服务提供商来通过因特网连接)。
此外，在本公开的示例性实施例中，还提供了一种能够实现上述方法的电子设备。所属技术领域的技术人员能够理解，本公开的各个方面可以实现为系统、方法或程序产品。因此，本公开的各个方面可以具体实现为以下形式，即：完全的硬件实施例、完全的软件实施例(包括固件、微代码等)，或硬件和软件方面结合的实施例，这里可以统称为“电路”、“模块”或“系统”。
下面参照图8来描述根据本公开的这种实施例的电子设备800。图8显示的电子设备800仅仅是一个示例，不应对本公开实施例的功能和使用范围带来任何限制。
如图8所示，电子设备800以通用计算设备的形式表现。电子设备800的组件可以包括但不限于：上述至少一个处理单元810、上述至少一个存储单元820、连接不同系统组件(包括存储单元820和处理单元810)的总线830、显示单元840。
其中，所述存储单元存储有程序代码，所述程序代码可以被所述处理单元810执行，使得所述处理单元810执行本说明书上述“示例性方法”部分中描述的根据本公开各种示例性实施例的步骤。
存储单元820可以包括易失性存储单元形式的可读介质，例如随机存取存储单元(RAM)8201和/或高速缓存存储单元8202，还可以进一步包括只读存储单元(ROM)8203。
存储单元820还可以包括具有一组(至少一个)程序模块8205的程序/实用工具8204，这样的程序模块8205包括但不限于：操作系统、一个或者多个应用程序、其它程序模块以及程序数据，这些示例中的每一个或某种组合中可能包括网络环境的实现。
总线830可以为表示几类总线结构中的一种或多种，包括存储单元总线或者存储单元控制器、外围总线、图形加速端口、处理单元或者使用多种总线结构中的任意总线结构的局域总线。
电子设备800也可以与一个或多个外部设备900(例如键盘、指向设备、蓝牙设备等)通信，还可与一个或者多个使得用户能与该电子设备800交互的设备通信，和 /或与使得该电子设备800能与一个或多个其它计算设备进行通信的任何设备(例如路由器、调制解调器等等)通信。这种通信可以通过输入/输出(I/O)接口850进行。并且，电子设备800还可以通过网络适配器860与一个或者多个网络(例如局域网(LAN)，广域网(WAN)和/或公共网络，例如因特网)通信。如图所示，网络适配器860通过总线830与电子设备800的其它模块通信。应当明白，尽管图中未示出，可以结合电子设备800使用其它硬件和/或软件模块，包括但不限于：微代码、设备驱动器、冗余处理单元、外部磁盘驱动阵列、RAID系统、磁带驱动器以及数据备份存储系统等。
通过以上的实施例的描述，本领域的技术人员易于理解，这里描述的示例实施例可以通过软件实现，也可以通过软件结合必要的硬件的方式来实现。因此，根据本公开实施例的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中或网络上，包括若干指令以使得一台计算设备(可以是个人计算机、服务器、终端装置、或者网络设备等)执行根据本公开实施例的方法。
此外，上述附图仅是根据本公开示例性实施例的方法所包括的处理的示意性说明，而不是限制目的。易于理解，上述附图所示的处理并不表明或限制这些处理的时间顺序。另外，也易于理解，这些处理可以是例如在多个模块中同步或异步执行的。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其他实施例。本公开旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限。

Claims (14)

  1. 一种会话策略控制方法，应用于策略控制功能PCF，包括：
    接收协议数据单元PDU会话建立请求，所述PDU会话建立请求为漫游终端发起的、且携带有公众陆地移动网PLMN的标识信息；
    根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，所述PDU会话策略控制信息是基于所述PCF所属的拜访地网络和所述漫游终端所属的归属地网络之间的服务级别协议SLA信息建立的PLMN维度的信息；和，
    向会话管理功能SMF发送所述目标PDU会话策略控制信息，以使所述SMF根据所述目标PDU会话策略控制信息创建所述漫游终端的PDU会话。
  2. 根据权利要求1所述的会话策略控制方法，其中，PDU会话策略控制信息以PLMN维度存储或配置于所述PCF或者统一数据仓储功能UDR中。
  3. 根据权利要求1所述的会话策略控制方法，其中，PDU会话策略控制信息以PLMN维度存储或配置于所述PCF中；
    所述根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，包括：
    根据预存的PDU会话策略控制信息与标识信息的对应关系，确定所述目标PDU会话策略控制信息。
  4. 根据权利要求1所述的会话策略控制方法，其中，PDU会话策略控制信息以PLMN维度存储或配置于UDR中，并且所述根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，包括：
    向所述UDR发送策略信息获取请求，所述策略信息获取请求携带有所述标识信息；
    接收所述UDR返回的、根据预存的PDU会话策略控制信息与标识信息的对应关系所确定的目标PDU会话策略控制信息。
  5. 根据权利要求1～4任一项所述的会话策略控制方法，其中，所述PDU会话策略控制信息包括允许的业务、保证比特速率控制信息、切片控制信息或计费信息中的至少一种。
  6. 根据权利要求1所述的会话策略控制方法，其中，基于拜访地网络和所述漫 游终端所属的归属地网络之间的SLA信息建立的PLMN维度的PDU会话策略控制信息包括多个信息集合，所述信息集合与终端的用户类别对应，并且，所述根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，包括：
    根据所述PDU会话建立请求携带的用户标识，确定所述漫游终端的用户类别；
    从所述用户类别对应的信息集合中确定所述标识信息对应的目标PDU会话策略控制信息。
  7. 根据权利要求1～4任一项所述的会话策略控制方法，其中，所述PCF为所述漫游终端的拜访地网络的策略控制功能V-PCF。
  8. 一种网元，所述网元为PCF，包括：
    接收单元，用于接收协议数据单元PDU会话建立请求，所述PDU会话建立请求为漫游终端发起的、且携带有公众陆地移动网PLMN的标识信息；
    信息确定单元，用于根据所述标识信息，从预存的PDU会话策略控制信息中获取对应的目标PDU会话策略控制信息，所述PDU会话策略控制信息是基于所述PCF所属的拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PLMN维度的信息；和，
    信息发送单元，用于向SMF发送所述目标PDU会话策略控制信息。
  9. 根据权利要求8所述的应用功能PCF，其中，所述策略控制功能PCF还包括：
    存储单元，存储或配置有PLMN维度的所述基于拜访地网络和所述漫游终端所属的归属地网络之间的SLA信息建立的PDU会话策略控制信息。
  10. 根据权利要求8所述的应用功能PCF，其中，所述PCF还包括：
    策略信息获取单元，用于向UDR发送策略信息获取请求，所述策略信息获取请求携带有所述标识信息，其中所述UDR中存储或配置有PLMN维度的PDU会话策略控制信息；
    策略信息接收单元，用于接收所述UDR返回的、根据预存的PDU会话策略控制信息与标识信息的对应关系所确定的目标PDU会话策略控制信息。
  11. 一种非瞬时性计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现根据权利要求1至7中任一项所述的会话策略控制方法。
  12. 一种电子设备，其特征在于，包括：
    处理器；以及
    存储器，用于存储所述处理器的可执行指令；
    其中，所述处理器配置为经由执行所述可执行指令来执行权利要求1至7中任一项所述的会话策略控制方法。
  13. 一种计算机程序，包括：指令，所述指令当由处理器执行时使所述处理器执行根据权利要求1至7中任一项所述的会话策略控制方法。
  14. 一种非瞬时性计算机程序产品，包括指令，所述指令当由处理器执行时使所述处理器执行根据权利要求1至7中任一项所述的会话策略控制方法。
PCT/CN2022/104618 2021-08-06 2022-07-08 会话策略控制方法、网元、存储介质和电子设备 WO2023011107A1 (zh)

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