WO2019042427A1 - 选择amf的方法、amf、系统及计算机可读存储介质 - Google Patents
选择amf的方法、amf、系统及计算机可读存储介质 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/06—Access restriction performed under specific conditions based on traffic conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- 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
Definitions
- the present disclosure relates to the field of communications technologies, and in particular, to a method, an AMF, a system, and a computer readable storage medium for selecting an Access and Mobility Management Function (AMF) AMF.
- AMF Access and Mobility Management Function
- a method of selecting an access and mobility management function AMF comprising the steps of: initial AMF receiving a registration request message sent by a user terminal UE; the initial AMF according to the registration request Transmitting, to the network slice selection function NSSF, an AMF that supports network slice selection of the UE, and querying, to the network function library function NRF, an AMF that supports network function selection of the UE; the initial AMF receiving the NSSF Returning first AMF information and second AMF information returned by the NRF, wherein the first AMF information includes information of an AMF supporting network slice selection of the UE, the second AMF information including supporting the UE Information of the AMF selected by the network function; the initial AMF acquires an intersection of the first AMF information and the second AMF information; and the initial AMF selects a target AMF from the intersection.
- an AMF comprising: a receiving module configured to receive a registration request message sent by a user terminal UE; and a query module configured to: according to the registration request message
- the network slice selection function NSSF queries the AMF that supports the network slice selection of the UE, and queries the network function library function NRF for the AMF that supports the network function selection of the UE; the receiving module is further configured to receive the NSSF return.
- First AMF information and second AMF information returned by the NRF wherein the first AMF information includes information of an AMF supporting network slice selection of the UE, and the second AMF information includes a network supporting the UE Information of the AMF selected by the function; an AMF intersection acquisition module configured to acquire an intersection of the first AMF information and the second AMF information; and an AMF selection module configured to select the target AMF.
- a system for selecting an AMF comprising the AMF, the NSSF and the NRF according to the second aspect, wherein the AMF is set to be according to the received registration request information
- the NSSF and the NRF query information of the eligible AMF and select a target AMF according to the NSSF and the AMF information returned by the NRF; and the NSSF and the NRF are set to return the eligible AMF to the AMF. information.
- a computer readable storage medium storing one or more programs, the one or more programs executable by one or more processors, To implement the method of selecting an AMF described in the present disclosure.
- FIG. 1 is a schematic diagram of a 5G network architecture in which various embodiments of the present disclosure may be implemented;
- FIG. 2 is a flowchart of a method for selecting an access and mobility management function AMF according to an embodiment of the present disclosure
- FIG. 3 is a schematic structural diagram of an AMF according to an embodiment of the present disclosure.
- FIG. 4 is a flow chart of another method of selecting an AMF according to an embodiment of the present disclosure.
- FIG. 5 is a block diagram showing a structure of a system for selecting an AMF according to an embodiment of the present disclosure.
- FIG. 1 is a schematic diagram of a 5G network architecture in which various embodiments of the present disclosure may be implemented.
- the 5G network architecture includes: a user equipment (UE), and a radio access network (RAN). Access and mobility management functions AMF, Authentication Server Function (AUSF), Unified Data Management (UDM), Session Management Function (SMF), User plane function (User plane) Function, UPF), Policy Control Functionality (PCF), Network Exposure Function (NEF), NF Repository Function (NRF), and Network Slice Selection Function (NSSF) ).
- AMF Access and mobility management functions
- AUSF Authentication Server Function
- UDM Unified Data Management
- SMF Session Management Function
- UPF User plane function
- PCF Policy Control Functionality
- NEF Network Exposure Function
- NRF Network Exposure Function
- NRF Network Exposure Function
- NRF Network Exposure Function
- NRF Network Repository Function
- NSSF Network Slice Selection Function
- the terminal UE accesses the 5G network mainly through a wireless air interface and obtains a service.
- the terminal UE may exchange information through the air interface and the base station, and communicate information through Non-Access Stratum (NAS) and AMF.
- NAS Non-Access Stratum
- the radio access network RAN is responsible for air interface resource scheduling of the terminal access network and connection management of the air interface.
- the access and mobility management function AMF is a core network control plane entity, which is mainly responsible for user mobility management, including: registration and temporary identity allocation, maintenance idle (IDLE) and connection (CONNECT) state, and state transition, in CONNECT state. The next switch, the paging in the user IDLE state, and the like.
- the authentication server function AUSF is a core network control plane entity, which is mainly responsible for authenticating and authorizing the user to ensure that the user is a legitimate user.
- the unified data management function UDM is a core network control plane entity that permanently stores user subscription data.
- the session management function SMF is a core network control plane entity, which is mainly responsible for maintaining a PDU session, allocating a user IP address, having quality of service (QoS) control and charging, and placing the user in idle ( In the IDLE state, the downlink packet is received for buffering and the AMF paging user is notified.
- QoS quality of service
- the user plane function is a core network user plane function entity, which is responsible for forwarding user data packets, and also has functions for counting user data packets for billing.
- the Policy Control Function is a core network control plane entity and is also responsible for the policy and charging rule function entity.
- the function entity generates control user data based on service information, user subscription information, and operator configuration information. Passed Qos rules, charging rules, and mobility and access control rules.
- the Network Exposure Function is a core network control plane entity that is responsible for the openness of mobile network capabilities.
- the NF Repository Function is a core network control plane entity that is responsible for dynamic registration of network function service capabilities and network function discovery.
- the Network Slice Selection Function is a core network control plane entity that is responsible for the selection of a target Network Slice Instance (NSI).
- the embodiment of the present disclosure provides a method for selecting an access and mobility management function AMF. Referring to FIG. 2, the method includes the following steps S201-S205.
- the initial AMF receives the registration request message transmitted by the user terminal UE.
- the initial AMF queries the network slice selection function NSSF for the AMF supporting the network slice selection of the UE according to the registration request message, and queries the network function library function NRF for the AMF that supports the network function selection of the UE.
- the initial AMF receives the first AMF information returned by the NSSF and the second AMF information returned by the NRF, wherein the first AMF information includes information of an AMF supporting network slice selection of the UE, the second AMF The information contains information about the AMF that supports the network function selection of the UE.
- the initial AMF acquires an intersection of the first AMF information and the second AMF information.
- the initial AMF selects the target AMF from the intersection.
- the step of the initial AMF selecting the target AMF from the intersection comprises the step of determining whether the initial AMF is itself included in the intersection, wherein, if so, the initial AMF determines itself For the target AMF, otherwise, the initial AMF selects a new AMF from the intersection as the target AMF.
- the second AMF information further includes load information of the AMF
- the step of the initial AMF selecting a new AMF as the target AMF from the intersection includes the following steps: the initial AMF selects a least loaded load from the intersection The new AMF serves as the target AMF.
- the initial AMF may initiate a query message to the NRF again, query the load information of all AMFs in the intersection, and then select a new AMF with the least load from the intersection.
- Target AMF the initial AMF may initiate a query message to the NRF again, query the load information of all AMFs in the intersection, and then select a new AMF with the least load from the intersection.
- the method further comprises the step of: if the initial AMF determines that it is the target AMF itself, continuing to process the registration request message; The initial AMF selects the new AMF as the target AMF, and the initial AMF redirects the registration request message to the new AMF, and the new AMF continues to process the registration request message.
- the initial AMF queries the network slice selection function NSSF according to the registration request message for an AMF that supports network slice selection of the UE, and queries the network function library function NRF to support the UE.
- the step of the network function selected AMF comprises the steps of: determining, by the initial AMF, information required for network slice selection of the UE and information required for network function selection of the UE according to the registration message, wherein the network slice The information required for the selection includes a single network slice selection assistance information (S-NSSAI) that the UE is determined to be used, and the information required for the network function selection includes the location information accessed by the UE and the UE.
- S-NSSAI single network slice selection assistance information
- the initial AMF sends a first AMF query request message to the NSSF, the first AMF query request message includes the S-NSSAI information; and the initial AMF sends a second AMF query request to the NRF
- the message, the second AMF query request message includes at least one of the location information and the wireless access information.
- the NSSF may be queried to obtain information about the AMF that supports the network slice selection of the UE, and the NRF query is used to obtain the network function selection of the supported UE.
- the AMF information is then selected from its intersection to select the appropriate AMF. Therefore, the selected AMF can support the network slice that the UE accesses later, and considers the actual processing capability and load condition of the AMF, thereby reducing the probability of subsequent AMF redirection and improving the user experience.
- the embodiment of the present disclosure further provides an AMF.
- the AMF includes: a receiving module 301, a query module 302, an AMF intersection acquiring module 303, and an AMF selecting module 304.
- the receiving module 301 is configured to receive a registration request message sent by the user terminal UE.
- the query module 302 is configured to query the network slice selection function NSSF according to the registration request message to the AMF that supports the network slice selection of the UE, and query the network function library function NRF for the AMF that supports the network function selection of the UE.
- the receiving module 301 is further configured to receive first AMF information returned by the NSSF and second AMF information returned by the NRF, where the first AMF information includes information of an AMF supporting network slice selection of the UE, the second AMF The information contains information about the AMF that supports the network function selection of the UE.
- the AMF intersection obtaining module 303 is further configured to acquire an intersection of the first AMF information and the second AMF information.
- the AMF selection module 304 is set to the intersection selection target AMF.
- the AMF selection module 304 includes a decision sub-module and a selection sub-module.
- the determining sub-module is configured to determine whether the AMF is included in the intersection.
- the selection submodule is configured to determine that the AMF is the target AMF when the AMF is included in the intersection, or to select a new AMF from the intersection when the AMF is not included in the intersection. Target AMF.
- the second AMF information further includes load information of the AMF, the selection sub-module being further arranged to select a new AMF with the least load from the intersection as the target AMF.
- the AMF further includes: a registration request processing module and a redirection module.
- the registration request processing module is arranged to continue processing the registration request message when determining that it is the target AMF itself.
- the redirection module is configured to redirect the registration request message to the new AMF when the new AMF is selected as the target AMF, and the registration request message is continued by the new AMF.
- the query module 302 includes a registration information analysis sub-module and a transmission sub-module.
- the registration information analysis sub-module is configured to determine, according to the registration message, information required for network slice selection of the UE and information required for network function selection of the UE, where the information required for the network slice selection includes that the UE is determined.
- the S-NSSAI that can be used, the information required for the network function selection includes at least one of location information of the UE access and wireless access information of the UE.
- the sending submodule is configured to send a first AMF query request message to the NSSF, the first AMF query request message includes the S-NSSAI information, and is configured to send a second AMF query request message to the NRF, the second AMF
- the query request message includes at least one of the location information and the wireless access information.
- the AMF may, when receiving the registration request message sent by the UE, query the NSSF for obtaining the information of the AMF that supports the network slice selection of the UE, and query the NRF for the information of the AMF that supports the network function selection of the UE. Then select the appropriate AMF from its intersection. Therefore, the selected AMF can support the network slice that the UE accesses later, and considers the actual processing capability and load condition of the AMF, thereby reducing the probability of subsequent AMF redirection and improving the user experience.
- Another embodiment of the present disclosure provides a method for selecting an AMF. Referring to FIG. 4, the method flow includes the following steps S401-S410.
- the UE initiates a registration procedure and sends a registration request message to AMF1.
- the registration request message carries the request S-NSSAI (Request S-NSSAI) information.
- the registration process includes a registration process such as a user initial access registration to a mobile network, a registration process initiated due to user movement, or a registration process initiated due to a change in terminal capabilities.
- the AMF1 receives the registration request message sent by the UE, and determines information required for network slice selection and information required for network function NF selection based on the registration information.
- the information required for network slice selection may include information such as S-NSSAI (ie, Accepted S-NSSAI) that the UE is determined to be usable.
- the information required for network function NF selection may include the location of the UE access, and the UE wireless. Access information, etc.
- the processing capabilities of the AMF include AMF coverage capabilities, wireless access technology support capabilities, and the like.
- the coverage capability means that the AMF is responsible for different areas. For example, AMF1 is responsible for handling the service of UE1 located in cell one, and AMF2 is responsible for the service of UE2 located in cell 2, and the coverage capabilities of AMF1 and AMF2 are different.
- the wireless access capability refers to the access mode of the AMF supporting the UE, for example, whether the UE is allowed to access from a Wireless Fidelity (WIFI) network, 4G or 5G.
- WIFI Wireless Fidelity
- the AMF can also obtain the user's subscription information and the like from the registration request message.
- the AMF1 sends a first AMF Query Request message to the NSSF, the first AMF Query Request message carrying information required for network slice selection, such as Accepted S-NSSAI.
- the NSSF returns a first AMF query response message to the initial AMF (Initial AMF), the first AMF query response message including an AMF list (hereinafter referred to as AMF List1).
- AMF List1 An AMF list
- the AMFList1 includes information (first AMF information) of the AMF supporting the network slice selection of the UE, that is, each AMF in the AMF List1 can support all NSIs that the UE may subsequently access.
- the AMF sends a second AMF Query Request message to the NRF, where the second AMF Query Request message carries information required for network function selection, such as location of the UE access.
- the NRF returns a second AMF query response message to the AMF1, the second AMF query corresponding message containing an AMF list (hereinafter referred to as AMF List2).
- AMFList2 includes information about AMF (second AMF information) supporting network function selection of the UE and load information of AMFs in the list. Since the second AMF query request message carries information such as the location of the UE access, the AMF included in the AMFList2 and supporting the network function selection of the UE means that each AMF in the AMFList2 can cover the access location of the UE.
- AMF second AMF information
- AMF1 acquires the intersection AMFList3 of AMFList1 and AMFList2.
- step S408 AMF1 determines whether AMF1 is included in AMFList3, and if so, step S409 is performed, otherwise, step S410 is performed.
- AMF1 continues to process the registration request message of the UE.
- the AMF1 performs AMF redirection, and selects a least loaded AMF2 from the AMFList3 to process the registration request message of the UE.
- AMF1 is the initial AMF
- AMF2 is the target AMF
- the method for selecting AMF solves the problem of selecting AMF according to network slice information, AMF capability, and load in a 5G network, so that when AMF is selected during user registration, both selected AMFs can be supported.
- the NSI that the UE subsequently accesses considers the capabilities of the AMF and the load information, thereby reducing the probability of subsequent AMF redirection and improving the user experience.
- the embodiment of the present disclosure further provides a system for selecting an AMF.
- the system includes: AMF 501, NSSF 502, and NRF 503.
- the AMF 501 is configured to query the NSSF and the NRF for information of the eligible AMF according to the received registration request information, and select the target AMF according to the NSSF and the AMF information returned by the NRF.
- the NSSF 502 and the NRF 503 are arranged to return information of the eligible AMF to the AMF.
- the module structure of the AMF 501 can refer to the structure shown in conjunction with FIG. 3, and details are not described herein.
- the system for selecting an AMF can solve the problem of selecting AMF according to network slice information, AMF capability, and load in a 5G network, so that when the AMF is selected in the user registration process, the selected AMF can support the UE.
- the subsequent access to the NSI takes into account the capabilities of the AMF and the load information, thereby reducing the probability of subsequent AMF redirection and improving the user experience.
- the embodiment of the present disclosure further provides a computer readable storage medium including a stored program, and controlling a device in which the computer readable storage medium is executed to execute the method according to the above embodiments while the program is running .
- embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
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Abstract
本公开提供了一种选择接入和移动管理功能AMF的方法、AMF、系统及计算机可读存储介质。所述选择AMF的方法包括以下步骤:初始AMF接收用户终端UE发送的注册请求消息;所述初始AMF根据所述注册请求消息向所述网络切片选择功能NSSF查询支持所述UE的网络切片选择的AMF,并向所述网络功能库功能NRF查询支持所述UE的网络功能选择的AMF;所述初始AMF接收所述NSSF返回的第一AMF信息和所述NRF返回的第二AMF信息,其中所述第一AMF信息包含支持所述UE的网络切片选择的AMF的信息,所述第二AMF信息包含支持所述UE的网络功能选择的AMF的信息;所述初始AMF获取所述第一AMF信息和所述第二AMF信息的交集;以及所述初始AMF从所述交集中选择目标AMF。
Description
本公开涉及通讯技术领域,尤其涉及一种选择接入和移动管理功能(Access and Mobility Management function,AMF)AMF的方法、AMF、系统及计算机可读存储介质。
移动通信已经发展到第五代(fifth generation,5G)阶段,在5G系统中,网络将被进一步抽象为“网络切片”,从而支持成千上万个用例、众多用户类型和各种应用的使用。网络切片后,用户对要接入的网络切片(Network Slice Instance,NSI)的选择由网络切片选择功能(Network Slice Selection Function,NSSF)完成。
然而,在用户注册过程中,对要接入和移动管理功能的选择,既需要考虑网络切片,又需要考虑AMF的能力及负荷等信息。但目前标准并未定义在用户注册过程中如何选择AMF。因此,有必要提供一种选择AMF的方法、装置、系统及计算机可读存储介质,以实现在用户注册过程中对AMF的选择。
发明内容
根据本公开的第一个方面,提供一种选择接入和移动管理功能AMF的方法,述方法包括以下步骤:初始AMF接收用户终端UE发送的注册请求消息;所述初始AMF根据所述注册请求消息向所述网络切片选择功能NSSF查询支持所述UE的网络切片选择的AMF,并向所述网络功能库功能NRF查询支持所述UE的网络功能选择的AMF;所述初始AMF接收所述NSSF返回的第一AMF信息和所述NRF返回的第二AMF信息,其中所述第一AMF信息包含支持所述UE的网络切片选择的AMF的信息,所述第二AMF信息包含支持所述UE的网络功能选择的AMF的信息;所述初始AMF获取所述第一AMF信息和所述第二AMF信息的交集;以及所述初始AMF从所述交集中选择目标AMF。
根据本公开的第二个方面,提供一种AMF,所述AMF包括:接收模块,其设置为接收用户终端UE发送的注册请求消息;查询模块,其设置为根据所述注册请求消息向所述网络切片选择功能NSSF查询支持所述UE的网络切片选择的AMF,并向所述网络功能库功能NRF查询支持所述UE的网络功能选择的AMF;所述接收模块还设置为接收所述NSSF返回的第一AMF信息和所述NRF返回的第二AMF信息,其中所述第一AMF信息包含支持所述UE的网络切片选择的AMF的信息,所述第二AMF信息包含支持所述UE的网络功能选择的AMF的信息;AMF交集获取模块,其设置为获取所述第一AMF信息和所述第二AMF信息的交集;以及AMF选择模块,其设置为所述交集中选择目标AMF。
根据本公开的第三个方面,提供一种选择AMF的系统,所述系统包括如第二方面所述的AMF、NSSF和NRF,其中,所述AMF设置为根据接收的注册请求信息向所述NSSF和所述NRF查询符合条件的AMF的信息,并根据所述NSSF和所述NRF返回的AMF信息选择目标AMF;并且所述NSSF及所述NRF设置为向所述AMF返回符合条件的AMF的信息。
根据本公开的第四个方面,提供一种计算机可读存储介质,所述计算机可读存储介质存储有一个或者多个程序,所述一个或者多个程序可被一个或者多个处理器执行,以实现本公开所描述的选择AMF的方法。
图1为在其中可以实现本公开各个实施例的5G网络架构示意图;
图2为根据本公开实施例提供的一种选择接入和移动管理功能AMF的方法的流程图;
图3为根据本公开实施例提供的一种AMF的结构示意图;
图4为根据本公开实施例提供的另一种选择AMF的方法的流程图;以及
图5为根据本公开实施例提供的一种选择AMF的系统的结构示 意图。
本公开目的的实现、功能特点及优点将结合实施例,参照附图做进一步说明。
为了使本公开所要解决的技术问题、技术方案及有益效果更加清楚、明白,以下结合附图和实施例,对本公开进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本公开,并不用于限定本公开。
图1为在其中可以实现本公开各个实施例的5G网络架构示意图,如图1所示,所述5G网络架构包括:终端(User Equipment,UE)、无线接入网(Radio Access Network,RAN)、接入和移动管理功能AMF、鉴权服务器功能(Authentication Server Function,AUSF)、统一数据管理功能(Unified Data Management,UDM)、会话管理功能(Session Management function,SMF)、用户面功能(User plane function,UPF)、策略控制功能(Policy Control Functionality,PCF)、能力开放功能(Network Exposure Function,NEF)、网络功能库功能(NF Repository Function,NRF)和网络切片选择功能(Network Slice Selection Function,NSSF)。下面参照图1对该5G网络架构中各网元的功能进行说明。
所述终端UE:主要通过无线空中接口接入5G网络并获得服务。所述终端UE可以通过空中接口和基站交互信息,通过非接入层信令(Non-Access Stratum,NAS)和AMF交互信息。
所述无线接入网RAN负责终端接入网络的空中接口资源调度和以及空中接口的连接管理。
所述接入和移动管理功能AMF是核心网控制面实体,其主要负责用户移动性管理,包括:注册和临时标识分配、维护空闲(IDLE)和连接(CONNECT)状态以及状态迁移、在CONNECT状态下的切换、用户IDLE状态下触发寻呼等。
所述鉴权服务器功能AUSF是核心网控制面实体,其主要负责对 用户的鉴权、授权,以保证用户是合法用户。
所述统一数据管理功能UDM是核心网控制面实体,其永久存储用户签约数据。
所述会话管理功能SMF是核心网控制面实体,其主要负责维护PDU会话(PDU Session)、分配用户IP地址,并具有服务质量(Quality of Service,QoS)控制和计费、将用户在空闲(IDLE)状态下收到下行数据包进行缓存并通知AMF寻呼用户等功能。
所述用户面功能(User plane function,UPF)是核心网用户面功能实体,其负责用户数据报文的转发,还具有对用户数据报文进行统计以用于计费等功能。
所述策略控制功能(Policy Control Functionality,PCF)是核心网控制面实体,也是负责策略和计费规则功能实体,该功能实体主要根据业务信息和用户签约信息以及运营商的配置信息产生控制用户数据传递的Qos规则、计费规则以及移动和接入控制规则。
所述能力开放功能(Network Exposure Function,NEF)是核心网控制面实体,其负责移动网络能力的对外开放。
所述网络功能库功能(NF Repository Function,NRF)是核心网控制面实体,其负责网络功能的服务能力的动态注册以及网络功能发现。
所述网络切片选择功能(Network Slice Selection Function,NSSF)是核心网控制面实体,其负责目标网络切片(Network Slice Instance,NSI)的选择。
以下结合上述通信网络系统来说明本公开方法的各个实施例。
本公开实施例提供了一种选择接入和移动管理功能AMF的方法,参阅图2,所述方法包括以下步骤S201-S205。
在步骤S201处,初始AMF接收用户终端UE发送的注册请求消息。
在步骤S202处,该初始AMF根据该注册请求消息向该网络切片选择功能NSSF查询支持该UE的网络切片选择的AMF,并向该网络功能库功能NRF查询支持该UE的网络功能选择的AMF。
在步骤S203处,该初始AMF接收该NSSF返回的第一AMF信息和该NRF返回的第二AMF信息,其中该第一AMF信息包含支持该UE的网络切片选择的AMF的信息,该第二AMF信息包含支持该UE的网络功能选择的AMF的信息。
在步骤S204处,该初始AMF获取该第一AMF信息和该第二AMF信息的交集。
在步骤S205处,该初始AMF从该交集中选择目标AMF。
在一个实施例中,初始AMF从该交集中选择目标AMF的步骤(步骤S203)包括以下步骤:该初始AMF判断其自身是否被包含在该交集中,其中,若是,该初始AMF确定其自身即为目标AMF,否则,该初始AMF从该交集中选择一个新AMF作为目标AMF。
在一个实施例中,该第二AMF信息还包含AMF的负载信息,该初始AMF从该交集中选择一个新AMF作为目标AMF的步骤包括以下步骤:该初始AMF从该交集中选择一个负载最小的新AMF作为目标AMF。
实际应用中,如果第二AMF信息中未包含AMF的负载信息,则初始AMF可以向NRF再次发起查询消息,查询交集中所有AMF的负载信息,然后在从交集中选择一个负载最小的新AMF最为目标AMF。
在一个实施例中,在该初始AMF从该交集中选择目标AMF的步骤之后,该方法还包括以下步骤:若该初始AMF确定其自身即为目标AMF,则继续处理该注册请求消息;以及若该初始AMF选择了新AMF作为目标AMF,则该初始AMF将该注册请求消息重定向至该新AMF,由该新AMF继续处理该注册请求消息。
在一个实施例中,所述初始AMF根据所述注册请求消息向所述网络切片选择功能NSSF查询支持所述UE的网络切片选择的AMF,并向所述网络功能库功能NRF查询支持所述UE的网络功能选择的AMF的步骤(步骤S202)包括以下步骤:该初始AMF根据该注册消息确定该UE的网络切片选择所需要的信息和该UE的网络功能选择需要的信息,其中,该网络切片选择所需要的信息包括该UE被确定的能够使用的单一网络切片选择辅助信息(Single Network Slice Selection Assistance Information,S-NSSAI),该网络功能选择 需要的信息包括UE接入的位置信息和UE的无线接入信息中的至少一个;该初始AMF向该NSSF发送第一AMF查询请求消息,该第一AMF查询请求消息包含该S-NSSAI信息;以及该初始AMF向该NRF发送第二AMF查询请求消息,该第二AMF查询请求消息包含该位置信息和无线接入信息中的至少一个。
根据本公开实施例的选择AMF的方法,可以在初始AMF接收到UE发送的注册请求消息时,向NSSF查询获得支持UE的网络切片选择的AMF的信息,向NRF查询获得支持UE的网络功能选择的AMF的信息,再从其交集中选择合适的AMF。由此,既能使选择的AMF支持UE后续接入的网络切片,又考虑了AMF的实际处理能力和负载情况,从而减少了后续AMF重定向的概率,提高了用户体验。
本公开实施例还提供了一种AMF,参阅图3,该AMF包括:接收模块301、查询模块302、AMF交集获取模块303和AMF选择模块304。
所述接收模块301设置为接收用户终端UE发送的注册请求消息。
所述查询模块302设置为根据该注册请求消息向该网络切片选择功能NSSF查询支持该UE的网络切片选择的AMF,并向该网络功能库功能NRF查询支持该UE的网络功能选择的AMF。
所述接收模块301还设置为接收该NSSF返回的第一AMF信息和该NRF返回的第二AMF信息,其中该第一AMF信息包含支持该UE的网络切片选择的AMF的信息,该第二AMF信息包含支持该UE的网络功能选择的AMF的信息。
所述AMF交集获取模块303还设置为获取该第一AMF信息和该第二AMF信息的交集。
所述AMF选择模块304设置为该交集中选择目标AMF。
在一个实施例中,该AMF选择模块304包括:判断子模块和选择子模块。
所述判断子模块设置为判断该AMF是否被包含在该交集中。
所述选择子模块设置为在该AMF被包含在该交集中时,确定该AMF即为目标AMF,或者用于在该AMF未被包含在该交集中时,从该交集中选择一个新AMF作为目标AMF。
在一个实施例中,该第二AMF信息还包含AMF的负载信息,该选择子模块还设置为从该交集中选择一个负载最小的新AMF作为目标AMF。
在一个实施例中,该AMF还包括:注册请求处理模块和重定向模块。
所述注册请求处理模块设置为在确定其自己即为目标AMF时,继续处理该注册请求消息。
所述重定向模块设置为在选择了新AMF作为目标AMF时,将该注册请求消息重定向至该新AMF,由该新AMF继续处理该注册请求消息。
在一个实施例中,该查询模块302包括:注册信息分析子模块和发送子模块。
所述注册信息分析子模块设置为根据该注册消息确定该UE的网络切片选择所需要的信息和该UE的网络功能选择需要的信息,其中,该网络切片选择所需要的信息包括该UE被确定的能够使用的S-NSSAI,该网络功能选择需要的信息包括UE接入的位置信息和UE的无线接入信息中的至少一个。
所述发送子模块设置为向该NSSF发送第一AMF查询请求消息,该第一AMF查询请求消息包含该S-NSSAI信息,以及设置为向该NRF发送第二AMF查询请求消息,该第二AMF查询请求消息包含该位置信息和无线接入信息中的至少一个。
根据本公开实施例的AMF,可以在接收到UE发送的注册请求消息时,向NSSF查询获得支持UE的网络切片选择的AMF的信息,向NRF查询获得支持UE的网络功能选择的AMF的信息,再从其交集中选择合适的AMF。由此,既能使选择的AMF可以支持UE后续接入的网络切片,又考虑了AMF的实际处理能力和负载情况,从而减少了后续AMF重定向的概率,提高了用户体验。
本公开实施例还提供了另一种选择AMF的方法,参阅图4,方法流程包括以下步骤S401-S410。
在步骤S401处,UE发起注册过程,向AMF1发送注册请求消息。
具体的,该注册请求消息中携带请求S-NSSAI(Request S-NSSAI)信息。
实际应用中,该注册过程包括用户初始接入注册到移动网络、由于用户移动而发起的注册过程或由于终端能力改变而发起的注册过程等注册过程。
在步骤S402处,AMF1接收UE发送的注册请求消息,根据注册信息确定网络切片选择所需的信息和网络功能NF选择所需要的信息。
实际应用中,网络切片选择所需的信息可以包括UE被确定可以使用的S-NSSAI(即Accepted S-NSSAI)等信息;网络功能NF选择所需要的信息可以包括UE接入的位置、UE无线接入信息等。
具体的,AMF的处理能力包括AMF的覆盖能力、无线接入技术支持能力等。覆盖能力是指AMF负责的区域范围不同,如AMF1负责处理位于小区一的UE1的业务,AMF2负责位于小区二的UE2的业务,AMF1和AMF2的覆盖能力是不同的。无线接入能力是指AMF支持UE的接入方式,比如,是否支持UE从无线保真(Wireless Fidelity,WIFI)网、4G或5G等接入。
AMF还可以从注册请求消息中获取用户的签约信息等。
在步骤S403处,AMF1向NSSF发送第一AMF查询请求消息,该第一AMF查询请求消息携带网络切片选择所需的信息,如Accepted S-NSSAI。
在S404处,NSSF向初始AMF(Initial AMF)返回第一AMF查询响应消息,该第一AMF查询响应消息包含AMF列表(下称AMF List1)。
该AMFList1中包含了支持UE的网络切片选择的AMF的信息(第一AMF信息),即AMF List1中每一个AMF都可以支持UE后续可能接入的所有NSI。
在步骤S405处,AMF向NRF发送第二AMF查询请求消息,该第二AMF查询请求消息携带网络功能选择所需的信息,如UE接入的位置等信息。
在步骤S406处,NRF向AMF1返回第二AMF查询响应消息,该第二AMF查询相应消息包含AMF列表(下称AMF List2)。
实际应用中,AMFList2中包含了支持UE的网络功能选择的AMF的信息(第二AMF信息)以及列表中个AMF的负载信息。由于第二AMF查询请求消息携带的是UE接入的位置等信息,所以AMFList2中包含的、支持UE的网络功能选择的AMF是指AMFList2中的每一个AMF都能够覆盖到UE的接入位置。
在步骤S407处,AMF1获取AMFList1和AMFList2的交集AMFList3。
在步骤S408处,AMF1判断AMFList3中是否包含了AMF1,若是,执行步骤S409,否则,执行步骤S410。
在步骤S409处,AMF1继续处理UE的注册请求消息。
在步骤S410处,AMF1执行AMF重定向,从AMFList3中选择一个负载最小的AMF2处理UE的注册请求消息。
在本公开实施例中,AMF1即为初始AMF,AMF2即为目标AMF。
根据本公开实施例的选择AMF的方法,解决了5G网络中根据网络切片信息、AMF的能力以及负荷来选择AMF的问题,使得在用户注册过程中选择AMF时,既能使选择的AMF可以支持UE后续接入的NSI,又考虑了AMF的能力以及负荷信息,从而减少了后续AMF重定向的概率,提高了用户体验。
本公开实施例还提供了一种选择AMF的系统,参阅图5,该系统包括:AMF 501、NSSF 502以及NRF 503。
所述AMF 501设置为根据接收的注册请求信息向该NSSF和该NRF查询符合条件的AMF的信息,并根据该NSSF和该NRF返回的AMF信息选择目标AMF。
所述NSSF 502及该NRF 503设置为向该AMF返回符合条件的AMF的信息。
AMF 501的模块结构可以参照结合图3所示出的结构,此处不在赘述。
根据本公开实施例的选择AMF的系统,能够解决5G网络中根据网络切片信息、AMF的能力以及负荷选择AMF的问题,使得在用户注册过程中选择AMF时,既能使选择的AMF可以支持UE后续接入的NSI, 又考虑了AMF的能力以及负荷信息,从而减少了后续AMF重定向的概率,提高了用户体验。
本公开实施例还提供了一种计算机可读存储介质,该计算机可读存储介质包括存储的程序,在该程序运行时控制该计算机可读存储介质所在设备执行根据以上各实施例所描述的方法。
本领域内的技术人员应明白,本公开的实施例可提供为方法、系统、或计算机程序产品。因此,本公开可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且,本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解,可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述,仅为本公开的示例性实施例而已,并非用于限定本 公开的保护范围。
Claims (12)
- 一种选择接入和移动管理功能AMF的方法,所述方法包括以下步骤:初始AMF接收用户终端UE发送的注册请求消息;所述初始AMF根据所述注册请求消息向所述网络切片选择功能NSSF查询支持所述UE的网络切片选择的AMF,并向所述网络功能库功能NRF查询支持所述UE的网络功能选择的AMF;所述初始AMF接收所述NSSF返回的第一AMF信息和所述NRF返回的第二AMF信息,其中所述第一AMF信息包含支持所述UE的网络切片选择的AMF的信息,所述第二AMF信息包含支持所述UE的网络功能选择的AMF的信息;所述初始AMF获取所述第一AMF信息和所述第二AMF信息的交集;以及所述初始AMF从所述交集中选择目标AMF。
- 如权利要求1所述的方法,其中,所述初始AMF从所述交集中选择目标AMF的步骤包括以下步骤:所述初始AMF判断其自身是否被包含在所述交集中,其中,若是,所述初始AMF确定其自身即为目标AMF,否则,所述初始AMF从所述交集中选择一个新AMF作为目标AMF。
- 如权利要求2所述的方法,其中,所述第二AMF信息还包含AMF的负载信息,所述初始AMF从所述交集中选择一个新AMF作为目标AMF的步骤包括以下步骤:所述初始AMF从所述交集中选择一个负载最小的新AMF作为目标AMF。
- 如权利要求2所述的方法,其中,所述初始AMF从所述交集中选择一个新AMF作为目标AMF的步骤之后,所述方法还包括以下步 骤:若所述初始AMF确定其自身即为目标AMF,则继续处理所述注册请求消息;以及若所述初始AMF选择了新AMF作为目标AMF,则所述初始AMF将所述注册请求消息重定向至所述新AMF,由所述新AMF继续处理所述注册请求消息。
- 如权利要求1至4任一项所述的方法,其中,所述初始AMF根据所述注册请求消息向所述网络切片选择功能NSSF查询支持所述UE的网络切片选择的AMF,并向所述网络功能库功能NRF查询支持所述UE的网络功能选择的AMF的步骤包括以下步骤:所述初始AMF根据所述注册消息确定所述UE的网络切片选择所需要的信息和所述UE的网络功能选择需要的信息,其中,所述网络切片选择所需要的信息包括所述UE被确定的能够使用的单一网络切片选择辅助信息S-NSSAI,所述网络功能选择需要的信息包括UE接入的位置信息和UE的无线接入信息中的至少一个;所述初始AMF向所述NSSF发送第一AMF查询请求消息,所述第一AMF查询请求消息包含所述S-NSSAI信息;以及所述初始AMF向所述NRF发送第二AMF查询请求消息,所述第二AMF查询请求消息包含所述位置信息和无线接入信息中的至少一个。
- 一种选择接入和移动管理功能AMF,包括:接收模块,其设置为接收用户终端UE发送的注册请求消息;查询模块,其设置为根据所述注册请求消息向网络切片选择功能NSSF查询支持所述UE的网络切片选择的AMF,并向网络功能库功能NRF查询支持所述UE的网络功能选择的AMF;所述接收模块还其设置为接收所述NSSF返回的第一AMF信息和所述NRF返回的第二AMF信息,其中所述第一AMF信息包含支持所述UE的网络切片选择的AMF的信息,所述第二AMF信息包含支持所述 UE的网络功能选择的AMF的信息;AMF交集获取模块,其设置为获取所述第一AMF信息和所述第二AMF信息的交集;以及AMF选择模块,其设置为所述交集中选择目标AMF。
- 如权利要求1所述的AMF,其中,所述AMF选择模块包括:判断子模块,其设置为判断所述AMF是否被包含在所述交集中;以及选择子模块,其设置为在所述AMF被包含在所述交集中时,确定所述AMF即为目标AMF,或者用于在所述AMF未被包含在所述交集中时,从所述交集中选择一个新AMF作为目标AMF。
- 如权利要求7所述的AMF,其中,所述第二AMF信息还包含AMF的负载信息,所述选择子模块还设置为从所述交集中选择一个负载最小的新AMF作为目标AMF。
- 如权利要求7所述的AMF,其中,所述AMF还包括:注册请求处理模块,其设置为在确定其自己即为目标AMF时,继续处理所述注册请求消息;以及重定向模块,其设置为在选择了新AMF作为目标AMF时,将所述注册请求消息重定向至所述新AMF,由所述新AMF继续处理所述注册请求消息。
- 如权利要求1至4任一项所述的AMF,其中,所述查询模块包括:注册信息分析子模块,其设置为根据所述注册消息确定所述UE的网络切片选择所需要的信息和所述UE的网络功能选择需要的信息,其中,所述网络切片选择所需要的信息包括所述UE被确定的能够使用的单一网络切片选择辅助信息S-NSSAI,所述网络功能选择需要的信息包括UE接入的位置信息和UE的无线接入信息中的至少一个;以 及发送子模块,其设置为向所述NSSF发送第一AMF查询请求消息,所述第一AMF查询请求消息包含所述S-NSSAI信息,以及用于向所述NRF发送第二AMF查询请求消息,所述第二AMF查询请求消息包含所述位置信息和无线接入信息中的至少一个。
- 一种选择接入和移动管理功能AMF的系统,所述系统包括如权利要求6至10中任一项所述的AMF、网络切片选择功能NSSF和网络功能库功能NRF,其中,所述AMF设置为根据接收的注册请求信息向所述NSSF和所述NRF查询符合条件的AMF的信息,并根据所述NSSF和所述NRF返回的AMF信息选择目标AMF;并且所述NSSF及所述NRF设置为向所述AMF返回符合条件的AMF的信息。
- 一种计算机可读存储介质,所述计算机可读存储介质存储有一个或者多个程序,所述一个或者多个程序可被一个或者多个处理器执行,以实现如权利要求1-5中任一项所述的步骤。
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