Method and apparatus for determining a screening strategy

Abstract

The embodiment of the application provides a method and device for determining a network selection strategy, and relates to the field of communication technology. The method comprises: a first network device acquires first network selection preference information, and determines a network selection strategy according to the first network selection preference information. The first network selection preference information is the network selection preference information of a first terminal, the first network selection preference information comprises a learning result obtained after learning data related to terminal network selection, and the network selection strategy is used for determining a wireless management strategy of the first terminal. The core network device can determine a network selection strategy for the terminal according to the network selection preference information of the terminal, and globally considers various influencing factors, so that the network finally selected by the terminal can guarantee user experience and avoid negative effects on the whole network.

Description

[0001] The application claims priority to the Chinese Patent Application No. 202110541595.1, filed on May 18, 2021, and entitled "Network management method and device based on UE motion mode", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to a network selection strategy determination method and device. BACKGROUND

[0003] Currently, referring to Figure 1 , there is a network deployment scenario in which long term evolution (LTE) (which can also be evolved LTE (eLTE), and hereinafter described by taking LTE as an example) and new radio (NR) two radio access technologies (RATs) (i.e., network standards) coexist in a 5th Generation (5G) system. There can be multiple access frequencies (hereinafter referred to as frequencies) for each network standard, such as 2.6 gigahertz (GHz), 3.5 GHz, 700 megahertz (MHz), etc. The process of determining the network standard and / or frequency by a terminal can be referred to as network selection.

[0004] Currently, in one case, a network can determine a network selection strategy for a terminal according to a demand (e.g., a service demand or a user demand), an access network device can determine network selection information according to the network selection strategy, and a terminal can perform network selection according to the network selection information sent by the access network device, thereby improving service quality and / or enhancing user experience. In another case, a terminal can learn its own network selection data, or learn network selection data of multiple terminals obtained from a server, obtain a network selection strategy, and perform network selection according to the network selection strategy. For the former, when the network formulates a network selection strategy for a terminal, only information related to a service is considered, and the network selection demand of the terminal is not considered comprehensively, so that the network selection strategy finally formulated for the terminal can not guarantee user experience, and even damage the brand image of the terminal (e.g., the network determined according to the network selection information leads to poor user experience, but the user can think that it is the terminal itself that leads to poor experience). For the latter, the terminal usually learns network selection data of a single terminal or part of terminals of the same brand, and cannot consider all factors affecting network selection globally, which can have a negative effect on the entire network, such as affecting the residence ratio of the network. SUMMARY

[0005] The embodiment of the present application provides a method and device for determining a network selection strategy, and solves the problem that the current network selection method cannot guarantee user experience or has a negative impact on the network.

[0006] In a first aspect, a method for determining a network selection strategy is provided, including: a first network device obtaining first network selection preference information, and determining a network selection strategy according to the first network selection preference information. The first network selection preference information is network selection preference information of a first terminal, the first network selection preference information includes a learning result obtained after learning data related to terminal network selection, and the network selection strategy is used to determine a wireless management strategy of the first terminal. The method provided in the first aspect can determine a network selection strategy for a terminal according to network selection preference information of the terminal, and consider all influencing factors globally, so that the network finally selected by the terminal can guarantee user experience and avoid having a negative impact on the entire network.

[0007] In a possible implementation, the method further includes: the first network device sending a first request for obtaining the network selection preference information of the first terminal to a second network device; and the first network device obtaining the first network selection preference information includes: the first network device receiving the first network selection preference information from the second network device. The possible implementation provides an implementation method for obtaining network selection preference information of a terminal.

[0008] In a possible implementation, the first request includes an analysis identifier, and the analysis identifier is used to indicate analysis of the network selection preference. The possible implementation can indicate which type of data is analyzed by the second network device by carrying the analysis identifier in the first request.

[0009] In a possible implementation, the first request further includes at least one of the following information: an identifier of the first terminal, location area information corresponding to the analysis identifier, time period information corresponding to the analysis identifier, an application identifier corresponding to the analysis identifier, slice information corresponding to the analysis identifier, and data network information corresponding to the analysis identifier. The possible implementation can more specifically indicate which data is analyzed by the second network device by carrying more specific information in the first request.

[0010] In a possible implementation, the first network device obtaining the first network selection preference information includes: the first network device receiving the first network selection preference information from the first terminal. The possible implementation provides another implementation method for obtaining network selection preference information of a terminal.

[0011] In a possible implementation, the data related to the network selection of the terminal includes one or more of the following information: operation behavior of the first terminal related to the network type, network selection information autonomously determined by the first terminal, network type in which the first terminal camps, user package of the first terminal, complaint information of the first terminal related to the network type, time information corresponding to the foregoing information, location information corresponding to the foregoing information, and service information corresponding to the foregoing information. This possible implementation provides multiple data for determining the network selection preference of the terminal, so that the credibility of the determined network selection preference is higher.

[0012] In a possible implementation, the network selection information autonomously determined by the first terminal includes at least one of the following information: target network information autonomously determined by the first terminal, reason for the first terminal to select the target network, priority of a frequency point autonomously determined by the first terminal, information of a first target cell autonomously determined by the first terminal, and reason for the first terminal to select the first target cell.

[0013] In a possible implementation, the reason for the first terminal to select the target network includes at least one of the following reasons: an access success rate of a source network is less than or equal to a first threshold, power consumption of the first terminal during access to the source network is greater than or equal to a second threshold, and a service quality value during access to the source network is less than or equal to a third threshold; and / or, the reason for the first terminal to select the first target cell includes at least one of the following reasons: an access success rate of a second target cell is less than or equal to a fourth threshold, the first terminal cannot display an icon for identifying the first type network on the second target cell, and the second target cell is a cell other than the first target cell and accessible to the first terminal.

[0014] In a possible implementation, the data related to the network selection of the terminal includes one or more of the following information: operation behavior of a plurality of terminals related to the network type, network selection information autonomously determined by the plurality of terminals, network type in which the plurality of terminals camp, user package of the plurality of terminals, complaint information of the plurality of terminals related to the network type, time information corresponding to the foregoing information, location information corresponding to the foregoing information, and service information corresponding to the foregoing information; wherein the plurality of terminals are related to the first terminal. This possible implementation can determine the network selection preference of a certain terminal through the data of the plurality of terminals, so that the credibility of the determined network selection preference is higher.

[0015] In a possible implementation, the first network selection preference information includes one or more of the following information: network type preferred by the first terminal, at least one network selection consideration factor of the first terminal, weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the foregoing information, location information corresponding to the foregoing information, and service information corresponding to the foregoing information.

[0016] In a possible implementation, the at least one network selection consideration factor of the first terminal includes at least one network selection consideration factor in the autonomous network selection process of the first terminal, and the weight corresponding to each of the at least one network selection consideration factor of the first terminal includes a weight corresponding to each of the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

[0017] In a possible implementation, the method further includes: sending, by the first network device, the network selection policy to an access network device accessed by the first terminal.

[0018] In a possible implementation, the first network device determines the network selection policy according to the first network selection preference information, including: the first network device determines the network selection policy according to the first network selection preference information and a service analysis result of the first terminal. In this possible implementation, the first network device can determine the network selection policy according to the network selection preference information and the service analysis result, so that the determined network selection policy takes into account various factors.

[0019] In a possible implementation, the method further includes: sending, by the first network device, indication information to the first terminal, the indication information being used to indicate that the first terminal performs network selection according to the network selection information issued by the network, or the indication information being used to indicate that the network selection information issued by the network is determined based on the network selection preference information of the first terminal. In this possible implementation, through the indication information, even if the first terminal directly performs network selection according to the network selection information, various factors can be taken into account, thereby improving user experience.

[0020] In a possible implementation, the first network device is a policy control network element, and the second network device is a data analysis network element.

[0021] In a second aspect, a method for determining a network selection policy is provided, including: sending, by a first terminal, data related to network selection of the first terminal to a third network device, the data related to network selection of the first terminal being used to determine first network selection preference information, the first network selection preference information being network selection preference information of the first terminal, the first network selection preference information being used to determine a network selection policy, and the network selection policy being used to determine a radio management policy of the first terminal. The method provided in the second aspect can enable the third network device to obtain the data related to network selection of the first terminal, thereby providing the data for other network elements in subsequent processes.

[0022] In a possible implementation, the data related to the network selection of the first terminal comprises one or more of the following information: operation behavior of the first terminal related to network type, network selection information autonomously determined by the first terminal, network type in which the first terminal camps, user package of the first terminal, complaint information of the first terminal related to network type, time information corresponding to the foregoing information, location information corresponding to the foregoing information, and service information corresponding to the foregoing information. This possible implementation provides multiple data for determining the network selection preference of the terminal, so that the credibility of the determined network selection preference is higher.

[0023] In a possible implementation, the network selection information autonomously determined by the first terminal comprises at least one of the following information: target network information autonomously determined by the first terminal, reason for the first terminal to select the target network, priority of the frequency point autonomously determined by the first terminal, information of the first target cell autonomously determined by the first terminal, and reason for the first terminal to select the first target cell.

[0024] In a possible implementation, the reason for the first terminal to select the target network comprises at least one of the following reasons: the access success rate of the source network is less than or equal to a first threshold, the power consumption of the first terminal during access to the source network is greater than or equal to a second threshold, and the service quality value during access to the source network is less than or equal to a third threshold; and / or, the reason for the first terminal to select the first target cell comprises at least one of the following reasons: the access success rate of the second target cell is less than or equal to a fourth threshold, the first terminal cannot display an icon for identifying the first type network on the second target cell, and the second target cell is a cell other than the first target cell and accessible to the first terminal.

[0025] In a possible implementation, the first network selection preference information comprises one or more of the following information: network type preferred by the first terminal, at least one network selection consideration factor of the first terminal, weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the foregoing information, location information corresponding to the foregoing information, and service information corresponding to the foregoing information.

[0026] In a possible implementation, the at least one network selection consideration factor of the first terminal comprises at least one network selection consideration factor in the autonomous network selection process of the first terminal; and the weight corresponding to each of the at least one network selection consideration factor of the first terminal comprises weight corresponding to each of the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

[0027] In a third aspect, a method for determining a network selection strategy is provided. The method includes: sending, by a first network device, a first request for obtaining network selection preference information of a first terminal to a second network device; receiving, by the second network device, the first request from the first network device, and obtaining data related to terminal network selection; learning, by the second network device, the data related to terminal network selection to obtain first network selection preference information, the first network selection preference information being the network selection preference information of the first terminal; sending, by the second network device, the first network selection preference information to the first network device; receiving, by the first network device, the first network selection preference information from the second network device, and determining a network selection strategy according to the first network selection preference information, the network selection strategy being used to determine a wireless management strategy of the first terminal.

[0028] The method provided in the third aspect further includes any one of the possible implementation manners provided in the first aspect and the second aspect.

[0029] In a possible implementation manner, the first network device is a policy control network element, and the second network device is a data analysis network element.

[0030] In a fourth aspect, a device for determining a network selection strategy is provided. The device includes: a functional unit for performing any one of the methods provided in the first aspect; and wherein the actions performed by the functional unit are implemented by hardware or by hardware executing corresponding software.

[0031] In a fifth aspect, a device for determining a network selection strategy is provided. The device includes: a functional unit for performing any one of the methods provided in the second aspect; and wherein the actions performed by the functional unit are implemented by hardware or by hardware executing corresponding software.

[0032] In a sixth aspect, a device for determining a network selection strategy is provided. The device includes: a memory and a processor; and optionally, at least one communication interface and a communication bus; the memory is configured to store computer-executable instructions; the processor, the memory, and the at least one communication interface are connected through the communication bus; the processor executes the computer-executable instructions stored in the memory, so that the device implements any one of the methods provided in the first aspect. The device can exist in the form of a chip product.

[0033] In a seventh aspect, a device for determining a network selection strategy is provided. The device includes: a memory and a processor; and optionally, at least one communication interface and a communication bus; the memory is configured to store computer-executable instructions; the processor, the memory, and the at least one communication interface are connected through the communication bus; the processor executes the computer-executable instructions stored in the memory, so that the device implements any one of the methods provided in the second aspect. The device can exist in the form of a chip product.

[0034] In an eighth aspect, a communication system is provided, including the apparatuses provided in the fourth aspect and the fifth aspect; or the apparatuses provided in the sixth aspect and the seventh aspect.

[0035] In a ninth aspect, a computer readable storage medium is provided, including instructions, which, when executed on a computer, cause the computer to perform any of the methods provided in the first aspect or the second aspect.

[0036] In a tenth aspect, a computer program product is provided, including instructions, which, when executed on a computer, cause the computer to perform any of the methods provided in the first aspect or the second aspect.

[0037] In an eleventh aspect, a chip is provided, including a processor and an interface, the processor being coupled with a memory through the interface, and when the processor executes a computer program or instructions in the memory, any of the methods provided in the first aspect or the second aspect is executed.

[0038] In the above aspects, the beneficial effects of the method corresponding to the apparatus can refer to the beneficial effects of the corresponding method, which will not be repeated. It should be noted that the various possible implementation manners of any one of the above aspects can be combined on the premise that the schemes are not contradictory. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic diagram of a RAT and a frequency point;

[0040] Figure 2 is a schematic diagram of an architecture of a 5G system;

[0041] Figure 3 is a schematic diagram of a service interface related to NWDAF;

[0042] Figure 4 is a schematic diagram of a method for determining an RFSP index provided by an embodiment of the present application;

[0043] Figure 5 is an interaction flowchart of a method for determining a network selection strategy provided by an embodiment of the present application;

[0044] Figure 6 is an interaction flowchart of another method for determining a network selection strategy provided by an embodiment of the present application;

[0045] Figure 7 is an interaction flowchart of still another method for determining a network selection strategy provided by an embodiment of the present application;

[0046] Figure 8 is a composition schematic diagram of a network selection strategy determination apparatus provided by an embodiment of the present application;

[0047] Figure 9 A hardware structure schematic diagram of a device for determining a network selection strategy provided by an embodiment of the present application. DETAILED DESCRIPTION

[0048] In the description of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In the description of the present application, unless otherwise specified, "at least one" means one or more, and "multiple" means two or more than two.

[0049] In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, "first", "second" and the like are used to distinguish the same items or similar items with basically the same function and effect. The skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution order, and "first", "second" and the like do not necessarily mean different.

[0050] Among them, the technical solutions of the embodiments of the present application can be applied to the fourth generation (4th Generation, 4G) system, various systems based on the evolution of 4G system (for example, 4.5G system), 5G system, various systems based on the evolution of 5G system. Among them, the 4G system can also be called evolved packet system (evolved packet system, EPS). The core network of the 4G system can be called evolved packet core (evolved packet core, EPC), and the access network can be called LTE. The access network of the 4.5G system can be called eLTE. The core network of the 5G system can be called 5GC (5G core), and the access network can be called NR.

[0051] Figure 2An exemplary network architecture of a 5G system is shown in the figure. In the figure, the 5G system can include one or more of the following network functions (NFs): an authentication server function (AUSF) network element, a core access and mobility management function (AMF) network element, a data network (DN), a unified data management (UDM) network element, a policy control function (PCF) network element, a (radio) access network (R)AN network element, a user plane function (UPF) network element, a terminal, an application function (AF) network element, a session management function (SMF) network element, a network exposure function (NEF) network element, a network function repository function (NRF) network element. Optionally, a network data analytics function (NWDAF) network element is also included. In addition to the network elements shown in the figure, the network architecture of the 5G network can also include other network elements. In embodiments of the present application, a network element can also be referred to as an entity or a device, etc. Figure 2 In addition to the network elements shown in the figure, the network architecture of the 5G network can also include other network elements. In embodiments of the present application, a network element can also be referred to as an entity or a device, etc.

[0052] It should be noted that Figure 2 The (R)AN network element, the AMF network element, the SMF network element, the AUSF network element, the UDM network element, the UPF network element, the PCF network element, and the NWDAF network element, etc. in the figure are only names, and the names do not constitute a limitation on the network elements themselves. In the 5G network and future other networks, the entities or devices corresponding to these network elements can also be other names, which are not specifically limited in embodiments of the present application. For example, the UDM network element can also be replaced by a home subscriber server (HSS) or a user subscription database (USD) or a database network element, etc. This is uniformly described here, and will not be described again below.

[0053] For convenience of description, the (R)AN network element, AMF network element, SMF network element, UDM network element, UPF network element, PCF network element, and NWDAF network element in the following are referred to as RAN, AMF, SMF, UDM, UPF, PCF, and NWDAF, respectively.

[0054] Figure 2 The terminal, RAN, UPF, and DN in the above are generally referred to as user plane network elements, and the user plane is used to carry service data. Figure 2 Other network elements in the above are referred to as control plane network elements, and the control plane is used to carry signaling messages. Figure 2 The interaction relationship between network elements and the corresponding interfaces are shown in the above, for example, the terminal and the AMF can interact through the N1 interface, and the interaction message is referred to as the N1 message. In the 5G system, some NFs interact through a service interface, and the service interface is named by adding N before the name of the corresponding NF, for example, the service interface provided by the AMF can be recorded as Namf. The NF (for example, NF1) can interact with other NFs (for example, NF2, NF3, and NF4) through the service interface, and the NF2, NF3, and NF4 interact with the NF1 through the service interface provided by the NF1. Some network elements (or devices) can communicate through a next generation (NG) interface, for example, the UPF can communicate with the SMF through the N4 interface.

[0055] Figure 2 The functions of some network elements in the above are as follows:

[0056] The PCF provides various related policies for network devices or service users, such as access control policies, session control policies, charging policies, and the like.

[0057] The UDM has functions of managing the subscription data of a user, generating authentication information of the user, and the like, and is used to provide at least one of the following functions for the terminal: user identification processing, access authorization, registration / mobility management, subscription management, short message management, and the like.

[0058] The AF can be an application server or a service server, provides a certain type of service for a user, and can belong to an operator or a third party. The AF mainly supports interaction with the 3rd generation partnership project (3GPP) core network to provide services, for example, affecting data routing decisions, policy control functions, or providing some services of a third party to the network side.

[0059] RAN, a network composed of multiple access network devices (may also be referred to as RAN nodes or network devices), implements wireless physical layer functions, resource scheduling and radio resource management, radio access control and mobility management functions, quality of service management, data compression and encryption functions. The access network device is connected to the UPF through the user plane interface N3 and is used to transmit data of the terminal. The access network device establishes a control plane signaling connection through the control plane interface N2 and the AMF, and is used to implement functions such as radio access bearer control. The access network device can be a device deployed in the RAN to provide wireless communication functions for terminals, for example, it can be a transmission reception point (TRP), a base station, various forms of control nodes (for example, a network controller, a radio controller (for example, a radio controller in a cloud radio access network (CRAN) scenario)), and the like. Specifically, the access network device can be various forms of macro base stations, micro base stations (also known as small stations), relay stations, access points (APs), and the like, and can also be an antenna panel of a base station. The control node can be connected to multiple base stations and configure resources for multiple terminals under the coverage of the multiple base stations. In systems using different radio access technologies, the names of devices with base station functions may vary. For example, in the LTE system, it can be an evolved NodeB (eNB or eNodeB), in the heterogeneous network (HetNet) scenario, it can be a micro base station eNB, in the distributed base station scenario, it can be a baseband unit (BBU) and a remote radio unit (RRU), in the CRAN scenario, it can be a baseband pool (BBU pool) and an RRU, in the 5G system or NR system, it can be a next generation node base station (gNB), and the specific name of the base station is not limited in the present application. The access network device can also be an access network device in a future evolved public land mobile network (PLMN) and the like.

[0060] The AMF is mainly responsible for signaling processing, such as registration management of the terminal, connection management of the terminal, reachability management of the terminal, access authorization and access authentication of the terminal, security function of the terminal, mobility management of the terminal, network slice selection, SMF selection, terminal attachment and detachment, and the like. The AMF serves as an anchor point of N1 and N2 signaling connection and provides routing of N1 / N2 interface session management (SM) messages for the SMF; and maintains and manages state information of the terminal. In a case where the AMF network element provides services for a session in the terminal, the AMF network element provides storage resources of a control plane for the session to store a session identifier, an identifier of the SMF associated with the session identifier, and the like.

[0061] The SMF is mainly responsible for all control plane functions of terminal session management, including selection, control, and redirection of the UPF, internet protocol (IP) address allocation and management, quality of service (QoS) management of the session, obtaining of a policy and charging control (PCC) policy from the PCF, establishment, modification, and release of a bearer, and the like. The SMF also serves as a terminal point of the SM part in a non-access stratum (NAS) message.

[0062] The UPF serves as an anchor point of a protocol data unit (PDU) session connection, and is responsible for data packet filtering, data transmission / forwarding (for example, forwarding of data exchanged between the access network device and the DN), rate control, generation of charging information, user plane QoS processing, uplink transmission authentication, transmission level verification, downlink data packet buffering, and downlink data notification triggering of the terminal. The UPF can also serve as a branch point of a multi-homed PDU session. Transmission resources and scheduling functions provided for the terminal in the UPF are managed and controlled by the SMF.

[0063] The NWDAF has data collection, training, analysis, and inference functions, can be used to collect relevant data from network elements, third-party service servers, terminals, or network management systems, perform analysis and training based on the relevant data, and provide data analysis results to the network elements, third-party service servers, terminals, or network management systems. The analysis results can assist the network in selecting service quality parameters of a service, or assist the network in performing traffic routing, or assist the network in selecting background traffic transmission strategies, and the like. For details, see (a) in Figure 3 Figure 3 ​(a) in Figure 1 illustrates a Data Collection architecture from any 5GC NF, any one NF can provide a service interface (i.e. interface Nnf in (a) in Figure 1) to the NWDAF, through which the NWDAF can invoke the NF and thus send data to the NF. See Figure 3 (a) in Figure 1 illustrates a Data Collection architecture from any 5GC NF, any one NF can provide a service interface (i.e. interface Nnf in (a) in Figure 1) to the NWDAF, through which the NWDAF can invoke the NF and thus send data to the NF. See Figure 3 (b) in Figure 1 illustrates a Network Data Analytics Exposure architecture, the NWDAF can also provide a service interface (i.e. interface Nnwdaf in (b) in Figure 1) to any one NF, through which the NF can invoke the NWDAF and thus send data to the NWDAF. Figure 3 (b) in Figure 1 illustrates a Network Data Analytics Exposure architecture, the NWDAF can also provide a service interface (i.e. interface Nnwdaf in (b) in Figure 1) to any one NF, through which the NF can invoke the NWDAF and thus send data to the NWDAF. Figure 3

[0064] DN, such as operator services, Internet access or third party services.

[0065] ​A terminal can refer to a device that provides voice and / or data connectivity to a user. A terminal can communicate with an access network device using some air interface technology (such as NR technology or LTE technology). A terminal can also communicate with another terminal using some air interface technology (such as NR technology or LTE technology). A terminal can be a mobile terminal, like a mobile phone (or "cellular" phone), a smart phone, a satellite radio, a wireless modem card, and a computer with a mobile terminal, e.g., a laptop, portable, pocket, handheld, computer-embedded, or car-mounted mobile device that exchanges voice and / or data with an access network device. Exemplary terminals can include personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), virtual reality (VR) glasses, augmented reality (AR) glasses, machine type communication terminals, and the like. In vehicle-to-everything (V2X) communication, a communication device loaded on a vehicle is a terminal, and a road side unit (RSU) can also be a terminal. A communication device loaded on a drone can also be considered a terminal. A terminal can also be referred to as a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, an access terminal, a user terminal, a user agent, and the like.

[0066] Currently, a network can determine a network selection policy for a terminal according to a requirement (for example, a service requirement or a user requirement), an access network device can determine network selection information according to the network selection policy, and the terminal selects a network according to the network selection information sent by the access network device, thereby improving service quality and / or enhancing user experience. For example, a network standard and / or a frequency point can be selected according to different service requirements, so as to improve service quality. For example, a voice (Voice) service runs more stably in LTE, at this time, LTE can be selected for the Voice service, a high definition video (HD video) service is more sensitive to data rate and the like, at this time, NR can be selected for the HD video service. For another example, a network standard and / or a frequency point can be selected for different value users or services. For example, because NR is high in cost and high in quality, NR can be selected for high value users or services. For another example, a network standard and / or a frequency point allocation scheme can dynamically (or adaptively) change according to time, place and the like, for the purpose of network load balancing and network energy saving. For example, when the load of NR is low, NR can serve part of low value services, and conversely, low value services can be transferred to LTE, and for another example, when a network standard / frequency point needs to be closed due to low cell usage rate at a certain time period, existing users are transferred to other network standards / frequency points.

[0067] In the embodiments of the present application, the process of selecting a network standard and / or a frequency point is referred to as network selection, and the network selection in the present application can refer to any one of the following cases: selecting a network standard, selecting a frequency point, and selecting a network standard and then selecting a frequency point. Currently, a terminal can implement the following scheme 1 or scheme 2 when performing network selection.

[0068] Scheme 1

[0069] The PCF determines an index to RAT / frequency selection priority (RFSP index) for the terminal, the RFSP index is used to indicate the priority of one or more network standards / frequency points, and the PCF sends the RFSP index to the access network device through the AMF. The access network device determines a radio resource management (RRM) strategy based on the RFSP index, and the RRM strategy specifically includes sending cell reselection priorities to the terminal when the terminal enters an idle state, which is used for the terminal to select a network according to the cell reselection priorities after entering the idle state and cell camping, or determining a target cell (i.e., redirecting the terminal to a different frequency point) / a target network standard (i.e., redirecting the terminal to a different network standard) for the terminal when in a connected state, and the like.

[0070] In determining the RFSP index, there is great complexity in considering the network selection requirements, therefore, the 3GPP standard proposes a network selection strategy based on big data analysis, that is, the scheme of NWDAF assisting in determining the RFSP index, so as to more intelligently perform terminal network selection. Specifically, see Figure 4 , the PCF can subscribe to the analysis results of terminal service behavior and service experience from the NWDAF, the NWDAF performs service usage analysis and service experience analysis according to the application usage and service experience input data obtained from the AF, the network data of terminal granularity (UE level) obtained from the operation, administration and maintenance (OAM), and the network data of QoS flow granularity (QoS flow level) obtained from the 5GC, obtains the service analysis results, and sends them to the PCF. The PCF determines the RFSP index for the terminal based on the service analysis results sent by the NWDAF.

[0071] Among them, the network data of terminal granularity mainly includes the reference signal received power (RSRP) of the terminal, the reference signal received quality (RSRQ), the signal to interference plus noise ratio (SINR) measurement value, etc. The network data of QoS flow granularity mainly includes the identification of QoS flow, the QoS parameter of QoS flow, and the data network name (DNN) corresponding to the PDU session (PDU session) to which the QoS flow belongs, slices, etc. The application usage and service experience input data mainly include the application identification used by the terminal, the start time, the end time, and the mean opinion score (MOS) value of the service, etc.

[0072] Scheme 2

[0073] To improve user experience and reflect terminal competitiveness, the mainstream terminal manufacturers are currently optimizing network selection independently. The terminal does not completely perform network selection according to the information (such as cell reselection priority, measurement frequency point) issued by the network. For example, the terminal performs local optimization or end-cloud joint optimization based on historical data, such as autonomous network selection based on user behavior, service experience, etc. For another example, the terminal in idle state can first screen the cells in the cell reselection priority based on user behavior, service experience, etc., and eliminate the cells that the terminal considers to have poor service experience, and then perform cell reselection according to the results after screening.

[0074] In the above solution 1, only the information related to the service (specifically, the service usage information and the service experience information) is considered when the network selection strategy is formulated for the terminal, and the network selection needs of the terminal are not considered comprehensively, so that the network selection strategy finally formulated for the terminal may not guarantee the user experience, and even damage the brand image of the terminal (for example, the network determined according to the network selection information leads to poor user experience, but the user may think that it is the terminal itself that leads to poor experience). In the above solution 2, the terminal usually learns based on a single terminal or part of terminals of the same brand, and cannot globally consider various influencing factors of network selection, which may have a negative effect on the entire network, for example, affecting the residence ratio of the network.

[0075] In order to guarantee the user experience and avoid negative effects on the entire network, the present application provides a method for determining a network selection strategy, in which a core network device can determine a network selection strategy for a terminal according to network selection preference information of the terminal, and globally consider various influencing factors, so that the network finally selected by the terminal can guarantee the user experience and avoid negative effects on the entire network. Referring to Figure 5 , the method comprises:

[0076] 501. The first network device obtains first network selection preference information, the first network selection preference information being network selection preference information of a first terminal, and the first network selection preference information including a learning result obtained by learning data related to network selection of the terminal.

[0077] The first network device, the second network device and the third network device in the present application can also be referred to as a first network element, a second network element and a third network element respectively. The first network device can be a policy control network element, for example, a PCF in a 5G system.

[0078] The first terminal in the present application can be a single terminal, or a terminal in a terminal group (UE group) composed of multiple terminals, without limitation.

[0079] The method for learning the data related to the network selection of the terminal can be statistical analysis, machine learning, artificial intelligence, or neural network, etc. It should be noted that the first network selection preference information is a prediction result of network selection generated according to historical data, and the more the historical data, the closer the prediction result to the actual network selection preference of the terminal.

[0080] 502. The first network device determines a network selection strategy according to the first network selection preference information.

[0081] Optionally, the network selection strategy is used to determine a radio resource management (RRM) strategy of the first terminal.

[0082] Optionally, the step 502 comprises, in a specific implementation, that the first network device determines the network selection policy according to the first network selection preference information and the service analysis result of the first terminal. The service analysis result of the first terminal includes an analysis result of service usage analysis and / or service experience analysis.

[0083] The network selection policy can be an RFSP index. For example, the RFSP index can be an integer from 1 to 256. Each value represents a network selection meaning. For example, Table 1 shows an RFSP index and a corresponding network selection meaning.

[0084] Table 1

[0085]

[0086] It should be noted that the RFSP index can also not indicate a single piece of information, but can indicate priority information of network standards / frequency points. Different RFSP indexes indicate different priority orders. For example, the priority of network standards indicated by an RFSP index (e.g., RFSP 3) from high to low is: NR-LTE-UTRAN. The priority of network standards indicated by another RFSP index (e.g., RFSP 4) from high to low is: UTRAN-LTE-NR. UTRAN refers to an evolved universal terrestrial radio access network (Evolved Universal Terrestrial Radio Access Network, EUTRAN).

[0087] Optionally, referring to Figure 5 After the step 502, the method further includes:

[0088] 503. The first network device sends the network selection policy to an access network device accessed by the first terminal. Correspondingly, the access network device accessed by the first terminal receives the network selection policy from the first network device.

[0089] 504. The access network device determines the RRM policy of the first terminal according to the network selection policy.

[0090] The RRM policy specifically includes a cell reselection priority of the terminal in an idle state for measuring and selecting a network generated by the access network device based on the RFSP index, measurement configuration information of the terminal in a connected state for measuring and reporting measurement results, and a target cell / target network standard determined for the terminal in the connected state (performing switching or redirection operations on the terminal, for example, transferring the terminal from NR to EUTRAN, or from 3.5 GHz to 2.6 GHz, etc.).

[0091] For example, if the access network device determines that the current network mode / frequency is the highest priority network mode / frequency according to the RFSP index sent by the PCF, the access network device decides to continue to reserve the terminal in the current network mode / frequency; if the access network device determines that the priority of other network modes / frequencies is higher according to the RFSP index sent by the PCF, the access network device triggers a handover process to hand over the terminal to other network modes / frequencies, or the access network device triggers a redirection process to send redirection information (containing other network mode / frequency information as target network mode / target frequency) to the terminal, and the terminal reselects the target network mode / target frequency after receiving the redirection information, thereby completing the redirection process.

[0092] 505. The access network device sends network selection information to the first terminal according to the RRM strategy of the first terminal. Correspondingly, the first terminal receives the network selection information sent by the access network device.

[0093] 506. The first terminal performs network selection according to the network selection information sent by the access network device.

[0094] If the first terminal is in an idle state, the network selection information can be a cell reselection priority, at this time, the first terminal can perform network selection according to the cell reselection priority.

[0095] If the first terminal is in a connected state, in one case, the network selection information can be measurement configuration information, for example, frequency point information that can be measured, at this time, the first terminal can perform measurement on these frequency points and report the measurement report to the access network device, and the access network device determines whether the terminal is handed over and to which cell according to the measurement report. In another case, the network selection information can be redirection information, for example, an RRC release message, which can include configuration information of a target cell, at this time, the first terminal can release the connection in the source cell according to the RRC release message and establish a connection in the target cell, thereby redirecting the first terminal to the target cell. The source cell refers to the cell before the first terminal is handed over, and the target cell refers to the cell after the first terminal is handed over.

[0096] Optionally, after step 502 and before step 506, the method further includes:

[0097] 11) The first network device sends indication information to the first terminal, the indication information being used to indicate that the first terminal performs network selection according to the network-deployed network selection information, or the indication information being used to indicate that the network-deployed network selection information is determined based on the network selection preference information of the first terminal. Correspondingly, the first terminal receives the indication information from the first network device.

[0098] In this case, the step 506 may, in a specific implementation, include that the first terminal selects a network only according to the network selection information under the indication of the indication information. That is, the first terminal selects a network completely according to the network selection information. Here, this is only an example of how the first terminal selects a network, and in actual implementation, the first terminal may also select a network according to the network selection information and other information according to its own needs, which is not limited in the present application.

[0099] The method provided by the embodiments of the present application can enable the core network device to determine a network selection strategy for the terminal according to the network selection preference information of the terminal, globally consider various influencing factors, so that the network ultimately selected by the terminal can guarantee user experience and avoid negative impact on the entire network.

[0100] In the above embodiments, the data related to the network selection of the terminal can be any one of the following case 1 to case 3.

[0101] Case 1: The data related to the network selection of the terminal is the data related to the network selection of the first terminal. That is, when determining the network selection preference information of the first terminal, learning can be performed only according to the data related to the network selection of the first terminal.

[0102] Case 2: The data related to the network selection of the terminal is the data related to the network selection of a plurality of terminals, the plurality of terminals are related to the first terminal, and the plurality of terminals do not include the first terminal.

[0103] Case 3: The data related to the network selection of the terminal is the data related to the network selection of a plurality of terminals, the plurality of terminals are related to the first terminal, and the plurality of terminals include the first terminal.

[0104] In case 2 and case 3, the network selection preference information learned by using the data related to the network selection of the plurality of terminals related to the first terminal can also be used to determine the network selection strategy for the first terminal. The plurality of terminals related to the first terminal means that the plurality of terminals and the first terminal are a type or a group of terminals, wherein the data related to the network selection of the type or the group of terminals can be learned together, for example, the terminals in the same location area can be a type or a group of terminals, or the terminals of the same brand can be a type or a group of terminals, or the terminals with the same user habits can be a type or a group of terminals. The type or the group of terminals can form a terminal group, and a terminal group can be identified by a terminal group identifier (UE group ID).

[0105] In the above embodiments, in the first case, the network selection strategy is the priority of the network standard, and in the second case, the network selection strategy is the priority of the frequency point. The data related to the network selection of the terminal in the two cases is described below.

[0106] First case: The network selection strategy is the priority of the network standard.

[0107] In the first case, the data related to the first terminal's network selection includes one or more of the following information (11) to information (18):

[0108] (11) The first terminal's network mode related operation behavior.

[0109] The first terminal's network mode related operation behavior can include one or more of the following behaviors: the behavior of opening / closing the first mode network switch, the network mode selected under different power levels (or the network mode selected when entering / leaving the power saving mode). The behavior of opening / closing the first mode network switch can be used to analyze whether the user is more inclined to select the first mode network, for example, if the user has not closed the first mode network switch for a long time (for example, 2 hours, 5 hours, 2 days) after opening it, it can be considered that the user is more inclined to select the first mode network. The network mode selected under different power levels (or the network mode selected when entering / leaving the power saving mode) can be used to analyze whether the user is more inclined to select the first mode network under different power levels (or when entering / leaving the power saving mode), for example, based on the example shown in Table 2, the user only selects LTE when the power is very low (10%), so it can be considered that the user is inclined to select LTE only in the case of low power (for example, less than or equal to 20%), and is inclined to select NR in the case of non-low power (for example, greater than 20%).

[0110] Table 2

[0111] Battery Selected network format 10％ LTE 30％ NR 50％ NR 80％ NR

[0112] In the embodiments of the present application, the first mode network and the second mode network are networks of different modes. The higher mode network among the first mode network and the second mode network can also be referred to as the high mode network, and the lower mode network can also be referred to as the low mode network. For example, the first mode network can be NR, and the second mode network can be LTE; or the first mode network can be LTE, and the second mode network can be NR. If there are more mode networks, these multiple mode networks can also be described as the first mode network, the second mode network, the third mode network, and so on.

[0113] (12) The first terminal's self-determined network selection information.

[0114] The network selection information autonomously determined by the first terminal can include at least one of the following information: target network (which can be referred to as a first target network) information autonomously determined by the first terminal, and network selection reason of the first terminal (the network selection reason is a reason for the first terminal to select the first target network). The first target network in the present application refers to a network determined to be joined by the user after network selection. The first target network information autonomously determined by the first terminal can be used to analyze whether the user is more inclined to select the first standard network in the case of autonomous network selection. The network selection reason of the first terminal can be used to analyze the case in which the user selected the first target network, and then determine the case in which the user is inclined to select the first standard network.

[0115] The network selection reason of the first terminal includes at least one of the following reasons: an access success rate of the source network is less than or equal to a first threshold value, power consumption of the first terminal during access to the source network is greater than or equal to a second threshold value, and a service quality value during access to the source network is less than or equal to a third threshold value (the smaller the service quality value, the worse the service quality). Alternatively, the network selection reason of the first terminal includes at least one of the following reasons: an access success rate of the second target network is less than or equal to a fifth threshold value. The second target network refers to a network that the first terminal can access in addition to the first target network. Optionally, the first target network can be a target network determined by the first terminal in autonomous network selection, and the second target network can be a target network of the first terminal in non-autonomous network selection.

[0116] The source network in the present application refers to a network joined by the terminal before network selection. The first threshold value, the second threshold value, and the third threshold value can all be preset (for example, configured by the network) or determined by negotiation between the terminal and the network, which is not limited in the present application.

[0117] The service quality value can be used to identify service quality. For example, the service quality value can be quality of experience (QoE) used to represent service experience. Specifically, for voice services, the service quality value can be a MOS value, for video services, the service quality value can be a video MOS value, and for other services, it can be a MOS value customized for the service. Each value of QOE represents a specific meaning, such as excellent, medium, poor, smooth, and lagging. It should be noted that the service quality value can be for a network slice or for an application, which is not limited in the present application.

[0118] It should be noted that at the same time, the first terminal can select a target network under the prompting of one network selection reason, or can select a target network under the prompting of multiple network selection reasons. For example, the source network is LTE, and the first terminal can select NR only in the case that the service quality value is less than or equal to the third threshold during access to LTE, and the access success rate of LTE is less than or equal to the first threshold.

[0119] Table 3 exemplarily shows the correspondence between a target network and a network selection reason.

[0120] Table 3

[0121]

[0122] (13) The network standard in which the first terminal resides.

[0123] The network standard in which the first terminal resides refers to the network standard in which the first terminal resides when collecting data related to network selection of the first terminal. This information can be used to analyze whether the first terminal is inclined to select the first standard network as a whole. For example, if 1000 times of network standards in which the first terminal resides are collected, and 800 times are NR and 200 times are LTE, it can be considered that the first terminal is inclined to select the first standard network.

[0124] (14) The user package of the first terminal.

[0125] The user package of the first terminal refers to the service package subscribed by the user. The service package can include information about whether the user subscribes to the service package of the first standard network, so as to determine whether the user is inclined to select the first standard network. If the user subscribes to the service package of the first standard network, it indicates that the user is inclined to select the first standard network without considering other factors. Otherwise, the user does not care much about whether to use the first standard network.

[0126] (15) Complaint information related to network standards of the first terminal.

[0127] The complaint information can be a complaint of the user about not residing in the first standard network. For example, the complaint information can be information about whether the user complains after switching from NR to LTE. The complaint information can be used to analyze whether the user is inclined to select the first standard network. If the user complains many times (for example, more than a threshold, which can be preset) about not residing in the first standard network, it can be considered that the user is inclined to select the first standard network. Otherwise, it is considered that the user does not care much about whether to use the first standard network.

[0128] The information (15) can be used to represent the sensitivity of the user to the first standard network.

[0129] (16) time information corresponding to the aforementioned information.

[0130] The aforementioned information herein can include one or more of the information (11), information (12), information (13), information (14), and information (15). It should be noted that for each of the aforementioned information, by the time information corresponding to the information, the data of the information at different times can be analyzed to determine whether the user is inclined to select the first mode network at different times.

[0131] For example, referring to Table 4, which is a correspondence between the behavior of opening / closing the first mode network switch and the time information in the aforementioned information, it can be seen from Table 4 that the user opens the first mode network switch during the day and closes the first mode network switch in the early morning, so it can be considered that the user is more inclined to select the first mode network during the day and evening (for example, 8:00 in the morning to 12:00 at night), and is inclined to select the second mode network in the early morning (for example, 0:00 in the morning to 8:00 in the morning).

[0132] Table 4

[0133]

[0134]

[0135] For another example, referring to Table 5, which is a correspondence between the network mode selected under different power and the time information in the aforementioned information, it can be seen from Table 5 that the user selects LTE when the power is 10% and in the early morning, and selects NR at other times regardless of the power. Therefore, it can be considered that the user is inclined to select the second mode network in the low power (for example, less than or equal to 20%) and in the early morning period (for example, 0:00 in the morning to 6:00 in the morning), and is inclined to select the first mode network at other times.

[0136] Table 5

[0137]

[0138] (17) location information corresponding to the aforementioned information.

[0139] The aforementioned information herein can include one or more of the information (11), information (12), information (13), information (14), and information (15). It should be noted that for each of the aforementioned information, by the time information corresponding to the information, the data of the information at different times can be analyzed to determine whether the user is inclined to select the first mode network at different times.

[0140] The location information herein can be a cell ID, a tracking area identity (TAI), coordinates, spatial information (e.g., a bedroom or outdoors), or the like.

[0141] For example, referring to Table 6, which is a correspondence between the network standard selected by the user under different power levels and the location information in the foregoing information, it can be seen from Table 6 that the user selects LTE only when the power level is 10% and the user is outdoors (e.g., a playground) and cannot charge, and selects NR in all other cases regardless of the location and the power level. Therefore, it can be considered that the user prefers to select the second standard network when the power level is low (e.g., less than or equal to 20%) and the location cannot be charged, and prefers to select the first standard network in all other locations.

[0142] Table 6

[0143]

[0144]

[0145] (18) Service information corresponding to the foregoing information.

[0146] The foregoing information herein can include one or more of the information (11), the information (12), the information (13), the information (14), and the information (15) described above. It should be noted that for each of the foregoing information, the data of the information under different services can be analyzed through the service information corresponding to the information, so as to determine whether the user prefers to select the first standard network under different services.

[0147] The service information herein can exemplarily be a service ID.

[0148] For example, referring to Table 7, which is a correspondence between the network standard selected by the user under different power levels and the service information in the foregoing information, it can be seen from Table 7 that the user selects LTE only when the power level is 10% and the user performs a service with low traffic demand (e.g., a voice service, a short message service), and selects NR in all other cases regardless of the service and the power level. Therefore, it can be considered that the user prefers to select the second standard network when the power level is low (e.g., less than or equal to 20%) and the user performs a service with low traffic demand (e.g., a voice service, a short message service), and prefers to select the first standard network in all other services.

[0149] Table 7

[0150]

[0151] In the first case, the data related to the network selection of the plurality of terminals includes one or more of the following information (21) to information (28):

[0152] (21) the operation behaviors of the plurality of terminals related to the network types.

[0153] (22) the network selection information autonomously determined by the plurality of terminals.

[0154] (23) the network types in which the plurality of terminals camp on.

[0155] (24) the user packages of the plurality of terminals.

[0156] (25) the complaint information of the plurality of terminals related to the network types.

[0157] (26) the time information corresponding to the aforementioned information.

[0158] (27) the location information corresponding to the aforementioned information.

[0159] (28) the service information corresponding to the aforementioned information.

[0160] The relevant descriptions of the data related to the network selection of each terminal in the plurality of terminals can be understood by referring to the relevant descriptions of the data related to the network selection of the first terminal, and will not be repeated.

[0161] In the first case, the first network selection preference information includes one or more of the following information (31) to information (37):

[0162] (31) the network type preferred by the first terminal.

[0163] The information (31) can be the network type preferred by the first terminal determined by comprehensively considering the aforementioned data related to the network selection of the terminal. For example, the user prefers the first type network, or the user does not care about the high and low type networks.

[0164] (32) at least one network selection consideration factor of the first terminal.

[0165] The at least one network selection consideration factor can include one or more of the following information: the current power, the power consumption in the network, the service quality value in the network, the access success rate of the network, the network performance, etc.

[0166] Optionally, the network selection consideration factor includes at least one network selection consideration factor in the autonomous network selection process of the first terminal. The at least one network selection consideration factor in the autonomous network selection process of the first terminal can include one or more of the following information: the current power, the power consumption in the network, the service quality value in the network, the access success rate of the network, etc.

[0167] (33) the weight corresponding to the at least one network selection consideration factor of the first terminal respectively.

[0168] The weight corresponding to one of the network selection consideration factors indicates the importance of the network selection consideration factor in the network selection process. The greater the weight, the more important it is. It should be noted that the weight of the same network selection consideration factor can be different in different scenarios.

[0169] Optionally, the weights corresponding to the network selection consideration factors respectively include weights corresponding to at least one of the network selection consideration factors in the autonomous network selection process of the first terminal.

[0170] (34) Probability of autonomous network selection.

[0171] The probability of autonomous network selection is used to indicate the probability of autonomous network selection. The greater the probability of autonomous network selection, the higher the credibility of the network selection strategy determined based on the first network selection preference information. The probability of autonomous network selection can be calculated, for example, by the number of times of autonomous network selection (or the number of days of autonomous network selection) and the total number of network selections (or the total number of network selection days).

[0172] (35) Time information corresponding to the aforementioned information.

[0173] The aforementioned information here can include one or more of the information (31), information (32), information (33), and information (34). It should be noted that by the time information corresponding to the aforementioned information, different network selection strategies can be formulated for the first terminal at different times.

[0174] For example, based on the example shown in Table 4, the network selection strategy of joining the first mode network can be formulated for the first terminal during the day and evening, and the network selection strategy of joining the second mode network can be formulated for the first terminal at dawn.

[0175] For another example, based on the example shown in Table 5, the network selection strategy of joining the second mode network can be formulated for the first terminal when the power is low (e.g., less than or equal to 20%) and during the early morning period (e.g., 0:00 to 6:00), and the network selection strategy of joining the first mode network can be formulated for the first terminal at other times.

[0176] (36) Position information corresponding to the aforementioned information.

[0177] The aforementioned information here can include one or more of the information (31), information (32), information (33), and information (34). It should be noted that by the position information corresponding to the aforementioned information, different network selection strategies can be formulated for the first terminal when the first terminal is in different positions.

[0178] For example, based on the example shown in Table 6, the network selection strategy of joining the second mode network can be formulated for the first terminal when the power is low (e.g., less than or equal to 20%) and the position is not chargeable, and the network selection strategy of joining the first mode network can be formulated for the first terminal at other positions.

[0179] (37) the service information corresponding to the aforementioned information.

[0180] The aforementioned information herein can include one or more of the information (31), information (32), information (33), and information (34). It should be noted that through the service information corresponding to the aforementioned information, different network selection strategies can be formulated for the first terminal when performing different services.

[0181] For example, based on the example shown in Table 7, when the first terminal is in a low power state (e.g., less than or equal to 20%) and performs a service with low traffic demand (e.g., voice service, short message service), the network selection strategy of joining the second mode network can be formulated for the first terminal, and for the remaining services, the network selection strategy of joining the first mode network can be formulated for the first terminal.

[0182] Based on the above description of the first network selection preference information, for example, when the first terminal prefers to select the first mode network, the RFSP index of the first mode network should be configured as much as possible so that the terminal stays in the first mode network as much as possible. When the first terminal does not care about the high and low mode networks, the RFSP index can be configured according to the power, power consumption, service quality value, network performance, and other factors, for example, when the load of the first mode network is heavy, the terminal stays in the second mode network as much as possible when the second mode network can meet the service demand, and stays in the first mode network as much as possible when the second mode network cannot meet the service demand, and stays in the first mode network as much as possible when the load of the first mode network is not heavy.

[0183] Second case: the network selection strategy is the priority of the frequency point.

[0184] In the second case, the data related to the network selection of the first terminal includes one or more of the following information (41) to information (44):

[0185] (41) the network selection information autonomously determined by the first terminal.

[0186] The network selection information autonomously determined by the first terminal can include at least one of the following information: the priority of the frequency point autonomously determined by the first terminal, the information of the first target cell autonomously determined by the first terminal, and the network selection reason of the first terminal (the network selection reason is the reason for the first terminal to select the first target cell).

[0187] The information of the cell can be cell ID, frequency point + PCI, and other information. PCI refers to physical cell identifier.

[0188] The priority of the frequency point autonomously determined by the first terminal can be used to analyze which cells on which frequency points the first terminal is inclined to select. The first target cell in the present application refers to the cell that the user determines to join after selecting a network. The information of the first target cell autonomously determined by the first terminal can be used to analyze which cells on which frequency points the user is inclined to select in the case of autonomous network selection. The network selection reason of the first terminal can be used to analyze the case in which the user selected the first target cell, and then determine the case in which the user is inclined to select cells on these frequency points.

[0189] The network selection reason of the first terminal includes at least one of the following reasons: the access success rate of the second target cell is less than or equal to a fourth threshold value, and the first terminal cannot display an icon for identifying the first standard network on the second target cell (at this time, the second target cell is a cell of the second standard network, or the second target cell is a cell of the second standard network and cannot perform dual connectivity (EN-DC) with the NR cell). The second target cell is a cell that the first terminal can access in addition to the first target cell. Optionally, the first target cell can be a target cell determined by the first terminal through autonomous network selection, and the second target cell can be a target cell of the first terminal through non-autonomous network selection.

[0190] For example, if the first terminal originally resides in LTE cell 1, dual connectivity of LTE and NR can be established on LTE cell 1, the first terminal needs to be switched, if it is switched to LTE cell 2, dual connectivity of LTE and NR cannot be achieved on LTE cell 2, and the 5G icon cannot be displayed, if it is switched to LTE cell 3, dual connectivity of LTE and NR can be achieved on LTE cell 3, and the 5G icon can be displayed, then the first terminal can select to reside in LTE cell 3, so as to establish dual connectivity of LTE and NR when needed. The second target cell is LTE cell 2, and the first target cell is LTE cell 3.

[0191] (42) Time information corresponding to the aforementioned information.

[0192] The aforementioned information herein can include the information (41) described above. It should be noted that through the time information corresponding to the information (41), the data of the information (41) at different times can be analyzed to determine which frequency points the user is inclined to select at different times.

[0193] (43) Location information corresponding to the aforementioned information.

[0194] The aforementioned information here can include the information (41) described above. It should be noted that through the position information corresponding to the information (41), the data of the information (41) in different positions can be analyzed to determine which frequency points the user prefers in different positions.

[0195] (44) Service information corresponding to the aforementioned information.

[0196] The aforementioned information here can include the information (41) described above. It should be noted that through the service information corresponding to the information (41), the data of the information (41) in different services can be analyzed to determine which frequency points the user prefers in different services.

[0197] In the second case, the data related to the network selection of the plurality of terminals includes one or more of the following information (51) to information (54):

[0198] (51) Network selection information autonomously determined by the plurality of terminals.

[0199] (52) Time information corresponding to the aforementioned information.

[0200] (53) Position information corresponding to the aforementioned information.

[0201] (54) Service information corresponding to the aforementioned information.

[0202] Among them, the related description of the data related to the network selection of each terminal in the plurality of terminals can be understood by referring to the related description of the data related to the network selection of the first terminal, and will not be repeated here.

[0203] In the second case, the first network selection preference information includes one or more of the following information (61) to information (68):

[0204] (61) Frequency point preferred by the first terminal.

[0205] The information (61) can be the frequency point preferred by the first terminal determined by comprehensively analyzing the aforementioned data related to the network selection of the terminal.

[0206] (62) At least one network selection consideration factor of the first terminal.

[0207] The at least one network selection consideration factor can include one or more of the following information: access success rate of the second target cell, whether the first terminal can display an icon for identifying the first mode network on the second target cell.

[0208] Optionally, the at least one network selection consideration factor comprises at least one network selection consideration factor in the first terminal autonomous network selection process. The at least one network selection consideration factor in the first terminal autonomous network selection process comprises one or more of the following information: an access success rate of the second target cell, whether the first terminal can display an icon for identifying the first standard network on the second target cell.

[0209] (63) The weight corresponding to each of the at least one network selection consideration factor of the first terminal.

[0210] The weight corresponding to each of the at least one network selection consideration factor of the first terminal.

[0211] Optionally, the weight corresponding to each of the at least one network selection consideration factor comprises a weight corresponding to each of the at least one network selection consideration factor in the first terminal autonomous network selection process.

[0212] (64) A probability of autonomous network selection.

[0213] The probability of autonomous network selection is used to indicate a probability of autonomous network selection. The greater the probability of autonomous network selection, the higher the credibility of the network selection strategy determined based on the first network selection preference information. The probability of autonomous network selection may, for example, be calculated by the number of times of autonomous network selection (or the number of days of autonomous network selection) and the total number of network selections (or the total number of network selection days).

[0214] (65) The first target cell and the second target cell.

[0215] The first target cell and the second target cell are used to indicate that the first terminal is inclined to select the first target cell in the case where the target cell of non-autonomous network selection is the second target cell.

[0216] (66) Time information corresponding to the aforementioned information.

[0217] The aforementioned information may comprise one or more of the information (61) to (65). It should be noted that different network selection strategies can be formulated for the first terminal at different times by means of the time information corresponding to the aforementioned information.

[0218] (67) Location information corresponding to the aforementioned information.

[0219] The aforementioned information may comprise one or more of the information (61) to (65). It should be noted that different network selection strategies can be formulated for the first terminal at different locations by means of the location information corresponding to the aforementioned information.

[0220] (68) service information corresponding to the foregoing information.

[0221] The foregoing information herein can include one or more of the information (61) to (65) described above. It should be noted that the service information corresponding to the foregoing information can be used to formulate different network selection strategies for the first terminal when the first terminal performs different services.

[0222] Based on the foregoing description of the first network selection preference information, for example, when the first terminal prefers to select certain frequency points, the corresponding RFSP index of these frequency points should be configured as much as possible so that the terminal stays in these frequency points as much as possible. When the first terminal does not care about the frequency points, whether the first terminal stays in a cell can be determined according to the access success rate of the cell, whether an icon for identifying the first network standard can be displayed on the cell, and the like.

[0223] It should be noted that in the first case, the data related to the network selection of the terminal can be used to determine the priority of the network standard, thereby being used to select the network standard for the terminal, in the second case, the data related to the network selection of the terminal can be used to determine the priority of the frequency point, thereby being used to select the frequency point for the terminal, and the data related to the network selection of the terminal in the first case and the data related to the network selection of the terminal in the second case can be combined to determine the priority of the network standard and the frequency point, thereby being used to select the network standard and the frequency point for the terminal.

[0224] In the above embodiments, the source and specific meaning of the data related to the network selection of the terminal (including the first case and the second case) can be referred to Table 8. It should be noted that the source of the data in each table of the present application refers to the initial source of the data, and does not mean that the data must be directly obtained from the source. For example, the data of "operation behavior of the terminal related to the network standard" in Table 8 can be directly obtained from the terminal, or from other network elements, for example, an AF, and the data in the AF can be reported by the terminal.

[0225] Table 8

[0226]

[0227]

[0228] In the data related to the network selection of the terminal described above, the information that can be determined by the terminal itself (i.e., the data from the terminal) can be considered as the data related to the autonomous network selection of the terminal, for example, the data related to the autonomous network selection of the terminal can refer to Table 9. In the above embodiment, the data related to the network selection of the terminal can be referred to as network selection preference (NWSP), and the data related to the autonomous network selection of the terminal can be referred to as autonomous network selection (AWSP).

[0229] Table 9

[0230]

[0231] In determining the first network selection preference information, the data shown in Table 8 can be learned, or the data shown in Table 9 can be learned, and the first network selection preference information can refer to Table 10.

[0232] Table 10

[0233]

[0234]

[0235] It should be noted that after determining the first network selection preference information, the first network selection preference information can be different due to different times, different locations, or different services, and therefore, multiple first network selection preference information can be determined. For example, refer to Table 11, each first network selection preference information can correspond to an index, and the first network selection preference information shown in Table 10 can be the network selection preference information corresponding to an index.

[0236] Table 11

[0237] index First Choice Network Preference Information 1 First Choice Network Preference Information 1 2 First Choice Network Preference Information 2 3 First Choice Network Preference Information 3

[0238] Step 501 can be implemented by the following mode 1 or mode 2 in specific implementation.

[0239] Mode 1

[0240] The first network device receives the first network selection preference information from the second network device. The second network device can be a data analysis network element, for example, NWDAF in a 5G system.

[0241] In mode 1, for example, the first network device receives the first network selection preference information, which can refer to Table 12. The difference between Table 12 and Table 10 is only that the identifier of the terminal / terminal group is added, and the index corresponding to the first network selection preference information.

[0242] Table 12

[0243]

[0244] In the manner 1, before receiving the first network selection preference information, the first network device can send a first request to the second network device, the first request being used to acquire the network selection preference information of the first terminal. The second network device receives the first request from the first network device, acquires the data related to the terminal network selection according to the first request, learns the first network selection preference information from the data related to the terminal network selection, and sends the first network selection preference information to the first network device.

[0245] In the manner 1, optionally, the first request includes an Analytics ID, the Analytics ID being used to indicate the analysis of the network selection preference. For example, the first request can be represented by the information including Analytics ID = UE NWSP to indicate the execution of the network selection preference analysis.

[0246] In the manner 1, it should be noted that the first request can further include other Analytics IDs, each Analytics ID being used to identify a type of analysis supported by the second network device (An Analytics ID information element is used to identify the type of supported analytics that NWDAF can generate).

[0247] In the manner 1, optionally, the first request further includes at least one of the following information: an identifier of the first terminal, location area information corresponding to the Analytics ID, an analytic target period corresponding to the Analytics ID, an application ID corresponding to the Analytics ID, slice information corresponding to the Analytics ID, and data network information corresponding to the Analytics ID.

[0248] In the manner 1, the identifier of the first terminal can be a subscription permanent identifier (SUPI) for example. The location area information can be a cell ID, a TAI, or the like for example. The slice information can be single network slice selection assistance information (S-NSSAI) for example. The data network information can be a DNN for example.

[0249] In the manner 1, it is to be explained that if the first network device needs the second network device to learn the data related to the network selection of the terminals in the terminal group, the identifier of the first terminal can be replaced by the UE group ID.

[0250] In the manner 1, the location area information corresponding to the analysis identifier is used to indicate that the network selection preference analysis is performed for the terminals in the location area, the time period information corresponding to the analysis identifier is used to indicate that the network selection preference analysis is performed for the terminals in the time period, the application identifier corresponding to the analysis identifier is used to indicate that the network selection preference analysis is performed for the application, the slice information corresponding to the analysis identifier is used to indicate that the network selection preference analysis is performed for the slice, and the data network information corresponding to the analysis identifier is used to indicate that the network selection preference analysis is performed for the data network.

[0251] In the manner 1, for example, the first network device can send a subscription request to the second network device by calling the service interface provided by the NWDAF, for example, the subscription request can be an analysis subscription Nnwdaf_AnalyticsSubscription_Subscribe (Analytics ID, analysis report target, analysis filtering information). In the present application, Analytics ID = UE NWSP, analysis report target = identifier of the first terminal, and analysis filtering information = (location area information, time period information, application identifier, slice information, data network information).

[0252] In the manner 1, the second network device can obtain the data related to the terminal network selection according to the first request, which can include that the second network device obtains the data related to the terminal network selection from other devices according to the first request. The other devices can be the terminal and / or the third network device. For the third network device, the second network device can send a second request to the third network device, and the second request is used to obtain the data related to the terminal network selection. The third network device receives the second request from the second network device, and sends the data related to the terminal network selection to the second network device according to the second request.

[0253] In the manner 1, the third network device can include an application network element (for example, an AF in a 5G system), an OAM, an NEF, etc. The data related to terminal network selection in the third network device can be reported by the terminal. Specifically, one or more terminals respectively send data related to their own network selection to the third network device, and the third network device receives the data related to network selection of each terminal from the one or more terminals. For example, the first terminal can send data related to network selection of the first terminal to the third network device, and the third network device receives the data related to network selection of the first terminal from the first terminal. The data related to network selection of the first terminal is used to determine the first network selection preference information. It should be noted that the terminal can actively report the data related to its own network selection to the third network device, or report the data related to its own network selection to the third network device under the indication of other network elements (for example, an access network device), which is not limited in the present application.

[0254] In the manner 1, the data related to terminal network selection obtained by the second network device can be referred to Table 13 or Table 14. The difference between Table 13 and Table 8, and the difference between Table 14 and Table 9 is only that the identifier of the terminal / terminal group is added, so that the second network device determines which terminal the obtained data is for.

[0255] Table 13

[0256]

[0257] Table 14

[0258]

[0259]

[0260] In the manner 1, the data related to terminal network selection can be the above case 1, case 2 or case 3.

[0261] Manner 2

[0262] The first terminal sends the first network selection preference information to the first network device, and the first network device receives the first network selection preference information from the first terminal. The first network selection preference information sent by the first terminal can be the learning result obtained by the first terminal after learning the data related to network selection of the first terminal. That is, in the manner 2, the data related to terminal network selection is the above case 1.

[0263] In the manner 2, the first terminal can send the first network selection preference information to the first network device through the access network device and the AMF. Specifically, the first terminal can send the first network selection preference information to the first network device in a registration process or a registration update process. If the first terminal needs to update the first network selection preference information, the first terminal can send the updated first network selection preference information to the first network device in the registration update process.

[0264] In the manner 2, the first network selection preference information is carried in a terminal policy container (UE Policy Container) in a registration request (registration request) for example.

[0265] In the manner 2, the first terminal can report the first network selection preference information by itself, or report the first network selection preference information based on an indication of the access network device. For example, the access network device sends an indication information to the first terminal for indicating the reporting of the network selection preference information, and the first terminal sends the first network selection preference information to the first device through the access network device and the AMF after receiving the indication information.

[0266] In the manner 2, the data related to the terminal network selection obtained by the second network device can refer to Table 14.

[0267] In order to make the embodiments of the present application clearer, the following takes the first network device as the PCF, the second network device as the NWDAF, and the third network device as the AF as an example, and the method provided by the above embodiments is exemplarily described. Figure 6 and Figure 7 The same parts in the above embodiments can refer to the description in the above embodiments and will not be described herein. Figure 6 For the above manner 1, an example of the implementation process of the present application is provided. Figure 7 For the above manner 2, an example of the implementation process of the present application is provided. Figure 6 and Figure 7 The same parts in the above embodiments can refer to the description in the above embodiments and will not be described herein.

[0268] Referring to Figure 6 The method comprises the following steps.

[0269] 601. One or more terminals send data related to the network selection of the terminals to an AF. Correspondingly, the AF receives the data related to the network selection of the one or more terminals from the one or more terminals.

[0270] The terminal can periodically or under a trigger condition report the data related to the network selection of the terminal to the network. The trigger condition can be, for example, that the user performs a switching operation of the first mode network, the terminal enters / leaves the power saving mode, the terminal performs autonomous network selection, etc.

[0271] It should be noted that for a terminal, the AF can obtain the data related to the network selection of the terminal from the terminal, or obtain the data related to the network selection of the terminal from other network elements (for example, OAM, NRF, etc.), or obtain the data related to the network selection of the terminal from both the terminal and other network elements, and the present application does not make any limitation.

[0272] 602、The PCF sends a first request to the NWDAF, and the first request is used to acquire network selection preference information of the first terminal. Correspondingly, the NWDAF receives the first request from the PCF.

[0273] In the implementation, the first request can be a call request sent by the PCF to the NWDAF through a service interface. For example, the PCF subscribes to an analytics event with Analytics ID = UE NWSP from the NWDAF. Specifically, the PCF sends an analytics subscription (Analytics ID = UE NWSP, target of analytics report = SUPI of the first terminal, analytics filtering information = (location area information, time period information, application identifier, slice information, and analytics data network information)) to the NWDAF by calling Nnwdaf_AnalyticsSubscription_Subscribe.

[0274] If the PCF only wants to acquire autonomous network selection preference information of the first terminal, Analytics ID = UE NWSP can be replaced by Analytics ID = UE AWSP.

[0275] 603、The NWDAF sends a second request to the AF, and the second request is used to acquire data related to terminal network selection. Correspondingly, the AF receives the second request from the NWDAF.

[0276] In the implementation, the second request can be a call request sent by the NWDAF to the AF through a service interface. For example, the NWDAF subscribes to a data notification for analyzing UE NWSP from the AF. Specifically, the NWDAF sends an event notification subscription Naf_EventExposure_Subscribe (Event ID = UE NWSP) to the AF, to indicate the AF to provide data of UE NWSP.

[0277] The AF can be a function entity (NW function for UE data collection) for collecting terminal data.

[0278] If the PCF only wants to acquire autonomous network selection preference information of the first terminal, Event ID = UE NWSP can be replaced by Event ID = UE AWSP.

[0279] 604、The AF sends a notification to the NWDAF according to the second request, and the notification includes data related to terminal network selection. Correspondingly, the NWDAF receives the notification sent by the AF.

[0280] Exposure_Notify.

[0281] The data in the notification sent by the AF is input data for the NWDAF to perform analysis, and specific content of the input data can be referred to in the foregoing, and will not be described herein again.

[0282] 605. The NWDAF learns data related to terminal network selection to obtain first network selection preference information, and the first network selection preference information is network selection preference information of the first terminal.

[0283] In a specific implementation, the NWDAF can analyze the received data related to terminal network selection by using a statistical analysis method or a machine learning method to obtain the first network selection preference information.

[0284] For related descriptions of the first network selection preference information, refer to the foregoing, and details are not described herein again.

[0285] Exemplarily, the first network selection preference information can be carried in an analytics subscription notification Nnwdaf_AnalyticsSubscription_Notify.

[0286] 606. The NWDAF sends the first network selection preference information to the PCF. Correspondingly, the PCF receives the first network selection preference information from the NWDAF.

[0287] 607. The PCF determines a network selection policy according to the first network selection preference information and a service analysis result.

[0288] 608. The PCF sends the network selection policy to an access network device accessed by the first terminal through the AMF. Correspondingly, the access network device receives the network selection policy from the PCF.

[0289] 609. The access network device determines an RRM policy for the first terminal according to the network selection policy.

[0290] 610. The access network device sends network selection information to the first terminal according to the RRM policy of the first terminal. Correspondingly, the first terminal receives the network selection information sent by the access network device.

[0291] 611. The first terminal performs network selection according to the network selection information sent by the access network device.

[0292] Referring to Figure 7 The method includes the following steps:

[0293] 701. The first terminal learns data related to autonomous network selection of the first terminal to obtain first network selection preference information.

[0294] 702、The first terminal sends first network selection preference information to the PCF through the access network device and the AMF. Correspondingly, the PCF receives the first network selection preference information from the first terminal through the access network device and the AMF.

[0295] In a specific implementation, the first terminal can send the first network selection preference information to the PCF in a registration procedure or a registration update procedure.

[0296] For example, the first network selection preference information can be sent to the AMF in a terminal policy container (UE Policy Container) in a registration request, and the AMF can send the PCF in a terminal policy container (UE Policy Container) in an access and mobility policy request (AM Policy request).

[0297] 703、The PCF determines a network selection policy according to the first network selection preference information and a service analysis result.

[0298] For details of the network selection policy, refer to the foregoing description, which will not be repeated here.

[0299] 704、The PCF sends an acceptance message to the first terminal through the AMF and the access network device.

[0300] The acceptance message is used to indicate that the PCF accepts the first network selection preference information, thereby implicitly indicating that the first terminal performs network selection according to the network selection information issued by the network, or indicating that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

[0301] For example, the acceptance message can be sent to the AMF in a terminal policy container (UE Policy Container) in an access and mobility policy response (AM Policy response), and the AMF can send the first terminal in a terminal policy container (UE Policy Container) in a registration response.

[0302] The execution sequence of steps 703 and 704 is not limited.

[0303] 705、The PCF sends the network selection policy to the access network device accessed by the first terminal through the AMF. Correspondingly, the access network device receives the network selection policy from the PCF through the AMF.

[0304] 706、The access network device determines an RRM policy for the first terminal according to the network selection policy.

[0305] 707、The access network device sends network selection information to the first terminal according to the RRM policy of the first terminal. Correspondingly, the first terminal receives the network selection information sent by the access network device.

[0306] 708、The first terminal performs network selection according to the network selection information sent by the access network device.

[0307] Figure 7 In the illustrated embodiment, if the data related to the autonomous network selection of the first terminal (for example, power information, time information, location information, etc.) changes, the first terminal can update the first network selection preference information according to the changed data related to the autonomous network selection of the first terminal, send the updated first network selection preference information to the PCF through the registration update process, and the PCF can update the network selection policy according to the updated first network selection preference information.

[0308] The method, terminal and network provided by the above embodiment can cooperatively determine a network selection policy, which takes into account the network selection demand and actual experience of the terminal, thereby improving user experience. The method solves the problem that the RFSP index determined by the network and the autonomous network selection policy of the terminal are not cooperative and not linked, and can be used to formulate / adjust the RFSP index of the network, facilitating network health check or network optimization. Moreover, the method can meet the user experience of the terminal, reduce the frequency of autonomous network selection of the terminal, and avoid negative impact of autonomous network selection of the terminal on the network.

[0309] It should be noted that the method provided by the embodiments of the present application is not only applicable to 5G networks, but also applicable to all communication system networks in which a data analysis function is deployed. Moreover, the data analysis function is not limited to being provided by the NWDAF, but can be provided by other modules or network elements with a data analysis function.

[0310] The present application also provides the following embodiments:

[0311] Embodiment 1. A method for determining a network selection policy, comprising:

[0312] The second network device receives a first request from the first network device, and the first request is used to obtain network selection preference information of a first terminal;

[0313] The second network device obtains data related to terminal network selection;

[0314] The second network device learns the data related to terminal network selection to obtain first network selection preference information, the first network selection preference information is the network selection preference information of the first terminal, the first network selection preference information is used to determine a network selection policy, and the network selection policy is used to determine a radio management policy of the first terminal;

[0315] The second network device sends the first network preference information to the first network device.

[0316] Embodiment 2. The method of embodiment 1, the first request comprising an analytics identifier, the analytics identifier being used to indicate an analytics network preference.

[0317] Embodiment 3. The method of embodiment 2, the first request further comprising at least one of the following information: an identifier of the first terminal, location area information corresponding to the analytics identifier, time period information corresponding to the analytics identifier, application identifier corresponding to the analytics identifier, slice information corresponding to the analytics identifier, data network information corresponding to the analytics identifier.

[0318] Embodiment 4. The method of any of embodiments 1-3, the data related to terminal network selection comprising one or more of the following information: operation behavior of the first terminal related to network standards, network selection information autonomously determined by the first terminal, network standard in which the first terminal camps, user package of the first terminal, complaint information of the first terminal related to network standards, time information corresponding to the foregoing information, location information corresponding to the foregoing information, service information corresponding to the foregoing information.

[0319] Embodiment 5. The method of embodiment 4, the network selection information autonomously determined by the first terminal comprising at least one of the following information: target network information autonomously determined by the first terminal, reason for the first terminal to select the target network, priority of a frequency point autonomously determined by the first terminal, information of a first target cell autonomously determined by the first terminal, reason for the first terminal to select the first target cell.

[0320] Embodiment 6. The method of embodiment 5, the reason for the first terminal to select the target network comprising at least one of the following reasons: an access success rate of a source network is less than or equal to a first threshold value, power consumption of the first terminal during access to the source network is greater than or equal to a second threshold value, a service quality value during access to the source network is less than or equal to a third threshold value; and / or, the reason for the first terminal to select the first target cell comprising at least one of the following reasons: an access success rate of a second target cell is less than or equal to a fourth threshold value, the first terminal is unable to display an icon for identifying a first standard network on the second target cell, the second target cell being a cell other than the first target cell that the first terminal is able to access.

[0321] In some embodiments, the data related to terminal network selection comprises one or more of: operation behaviors of a plurality of terminals related to network types, network selection information autonomously determined by the plurality of terminals, network types in which the plurality of terminals camp on, user plans of the plurality of terminals, complaint information of the plurality of terminals related to network types, time information corresponding to the foregoing information, location information corresponding to the foregoing information, and service information corresponding to the foregoing information.

[0322] In some embodiments, the first network selection preference information comprises one or more of: a network type preferred by the first terminal, at least one network selection consideration factor of the first terminal, a weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the foregoing information, location information corresponding to the foregoing information, and service information corresponding to the foregoing information.

[0323] In some embodiments, the at least one network selection consideration factor of the first terminal comprises at least one network selection consideration factor in an autonomous network selection process of the first terminal.

[0324] In some embodiments, the weight corresponding to each of the at least one network selection consideration factor of the first terminal comprises a weight corresponding to each of the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

[0325] In some embodiments, the first network device is a policy control network element, and the second network device is a data analysis network element.

[0326] In some embodiments, the method for determining a network selection policy comprises:

[0327] In some embodiments, the method for determining a network selection policy further comprises:

[0328] In some embodiments, the method for determining a network selection policy further comprises:

[0329] In some embodiments, the method for determining a network selection policy further comprises:

[0330] In some embodiments, the method for determining a network selection policy further comprises:

[0331] The first terminal selects a network according to the network selection information.

[0332] Embodiment 13. The method of any one of embodiments 11-12, wherein the data related to the network selection of the first terminal comprises one or more of: an operating behavior of the first terminal related to a network type, network selection information autonomously determined by the first terminal, a network type in which the first terminal is camped, a user plan of the first terminal, complaint information of the first terminal related to a network type, time information corresponding to the foregoing information, location information corresponding to the foregoing information, service information corresponding to the foregoing information.

[0333] Embodiment 14. The method of embodiment 13, wherein the network selection information autonomously determined by the first terminal comprises at least one of: target network information autonomously determined by the first terminal, a reason for the first terminal to select the target network, a priority of a frequency point autonomously determined by the first terminal, information of a first target cell autonomously determined by the first terminal, a reason for the first terminal to select the first target cell.

[0334] Embodiment 15. The method of embodiment 14, wherein the reason for the first terminal to select the target network comprises at least one of: an access success rate of a source network being less than or equal to a first threshold, a power consumption of the first terminal during access to the source network being greater than or equal to a second threshold, a service quality value during access to the source network being less than or equal to a third threshold; and / or, the reason for the first terminal to select the first target cell comprises at least one of: an access success rate of a second target cell being less than or equal to a fourth threshold, the first terminal being unable to display an icon for identifying a first network type on the second target cell, the second target cell being a cell other than the first target cell that the first terminal is able to access.

[0335] Embodiment 16. The method of any one of embodiments 11-15, wherein the first network selection preference information comprises one or more of: a network type preferred by the first terminal, at least one network selection consideration factor of the first terminal, a weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the foregoing information, location information corresponding to the foregoing information, service information corresponding to the foregoing information.

[0336] Embodiment 17. The method of embodiment 16,

[0337] the at least one network selection consideration factor of the first terminal comprises at least one network selection consideration factor in an autonomous network selection process of the first terminal.

[0338] The weights respectively corresponding to the at least one network selection consideration factor of the first terminal include: the weights respectively corresponding to the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

[0339] Example 18. The method according to Example 12, further comprising:

[0340] The first terminal receives instruction information from the first network device, where the instruction information is used to instruct the first terminal to select a network according to network selection information issued by the network, or the instruction information is used to instruct the network selection information issued by the network to be determined based on network selection preference information of the first terminal;

[0341] The first terminal selects a network according to the network selection information, including: the first terminal selects a network only according to the network selection information under the instruction of the indication information.

[0342] Example 19. According to the method described in any one of Examples 11 to 18, the first network device is a policy control network element.

[0343] Example 20. A device for determining a network selection strategy, comprising: a functional unit for executing the method described in any one of Examples 1-19; wherein the action performed by the functional unit is implemented through hardware or the corresponding software is implemented through hardware.

[0344] Example 21. A device for determining a network selection strategy, comprising: a processor coupled to a memory; the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory, so that the device implements the method described in any one of Examples 1-19.

[0345] Embodiment 22. A method for determining a network selection strategy, comprising:

[0346] The first network device sends a first request to the second network device, where the first request is used to obtain network selection preference information of the first terminal;

[0347] The second network device receives the first request from the first network device and obtains data related to the terminal network selection;

[0348] The second network device learns the data related to the terminal network selection to obtain first network selection preference information, where the first network selection preference information is the network selection preference information of the first terminal;

[0349] The second network device sends the first network selection preference information to the first network device;

[0350] The first network device receives the first network selection preference information from the second network device, and determines a network selection strategy according to the first network selection preference information, the network selection strategy being used to determine a wireless management strategy of the first terminal.

[0351] Embodiment 23. The method of embodiment 22, the first request comprising an analytics identifier, the analytics identifier being used to indicate an analytics network selection preference.

[0352] Embodiment 24. The method of embodiment 23, the first request further comprising at least one of the following information: an identity of the first terminal, location area information corresponding to the analytics identifier, time period information corresponding to the analytics identifier, an application identifier corresponding to the analytics identifier, slice information corresponding to the analytics identifier, data network information corresponding to the analytics identifier.

[0353] Embodiment 25. The method of any one of embodiments 22-24, the data related to terminal network selection comprising one or more of the following information: an operating behavior of the first terminal related to network standards, network selection information autonomously determined by the first terminal, a network standard in which the first terminal camps, a user plan of the first terminal, complaint information of the first terminal related to network standards, time information corresponding to the foregoing information, location information corresponding to the foregoing information, service information corresponding to the foregoing information.

[0354] Embodiment 26. The method of embodiment 25, the network selection information autonomously determined by the first terminal comprising at least one of the following information: target network information autonomously determined by the first terminal, a reason for the first terminal to select the target network, a priority of a frequency point autonomously determined by the first terminal, information of a first target cell autonomously determined by the first terminal, a reason for the first terminal to select the first target cell.

[0355] Embodiment 27. The method of embodiment 26, the reason for the first terminal to select the target network comprising at least one of the following reasons: an access success rate of a source network being less than or equal to a first threshold value, power consumption of the first terminal during access to the source network being greater than or equal to a second threshold value, a service quality value during access to the source network being less than or equal to a third threshold value; and / or, the reason for the first terminal to select the first target cell comprising at least one of the following reasons: an access success rate of a second target cell being less than or equal to a fourth threshold value, the first terminal being unable to display an icon for identifying a first standard network on the second target cell, the second target cell being a cell other than the first target cell and accessible by the first terminal.

[0356] Embodiment 28. The method of any one of embodiments 22-27, wherein the data related to terminal network selection comprises one or more of the following information: operation behavior of a plurality of terminals related to network type, network selection information autonomously determined by the plurality of terminals, network type in which the plurality of terminals camp on, user package of the plurality of terminals, complaint information of the plurality of terminals related to network type, time information corresponding to the foregoing information, location information corresponding to the foregoing information, service information corresponding to the foregoing information; wherein the plurality of terminals are related to the first terminal.

[0357] Embodiment 29. The method of any one of embodiments 22-28, wherein the first network selection preference information comprises one or more of the following information: network type preferred by the first terminal, at least one network selection consideration factor of the first terminal, weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the foregoing information, location information corresponding to the foregoing information, service information corresponding to the foregoing information.

[0358] Embodiment 30. The method of embodiment 29,

[0359] the at least one network selection consideration factor of the first terminal comprises at least one network selection consideration factor in an autonomous network selection process of the first terminal.

[0360] the weight corresponding to each of the at least one network selection consideration factor of the first terminal comprises a weight corresponding to each of the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

[0361] Embodiment 31. The method of any one of embodiments 22-30, wherein the determining, by the first network device, the network selection strategy according to the first network selection preference information comprises:

[0362] the determining, by the first network device, the network selection strategy according to the first network selection preference information and the service analysis result of the first terminal.

[0363] Embodiment 32. The method of any one of embodiments 22-31, further comprising:

[0364] the first network device sending the network selection strategy to an access network device accessed by the first terminal;

[0365] the access network device receiving the network selection strategy from the first network device, determining a radio management strategy of the first terminal according to the network selection strategy, and determining network selection information of the first terminal according to the radio management strategy of the first terminal.

[0366] the access network device sending the network selection information to the first terminal.

[0367] The first terminal receives the network selection information from the access network device.

[0368] The first terminal performs network selection according to the network selection information.

[0369] Embodiment 33. The method of embodiment 32, further comprising:

[0370] The first network device sends indication information to the first terminal, the indication information indicating that the first terminal performs network selection according to network-deployed network selection information, or the indication information indicating that network-deployed network selection information is determined based on network selection preference information of the first terminal.

[0371] The first terminal receives the indication information from the first network device.

[0372] The first terminal performs network selection according to the network selection information, comprising: the first terminal only performs network selection according to the network selection information under the indication of the indication information.

[0373] Embodiment 34. The method of any one of embodiments 22-33, further comprising:

[0374] The first terminal sends data related to network selection of the first terminal to a third network device.

[0375] The third network device receives the data related to network selection of the first terminal from the first terminal.

[0376] The second network device obtains data related to network selection of a terminal, comprising: the second network device obtains the data related to network selection of a terminal from the third network device.

[0377] Embodiment 35. The method of any one of embodiments 22-34, the first network device being a policy control network element, and the second network device being a data analysis network element.

[0378] It should be noted that each network element, such as the first network device, the second network device, the terminal, etc., includes a hardware structure and / or software module for performing each function in order to implement the above functions. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0379] The embodiments of the present application can divide the functional units of the first network device, the second network device, and the terminal according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated in one processing unit. The integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division. Actual implementation can have another division manner.

[0380] In the case of using integrated units, Figure 8 A network policy determination apparatus 80 involved in the above embodiments is shown. The network policy determination apparatus 80 can include a processing unit 801 and a communication unit 802. Optionally, the network policy determination apparatus 80 further includes a storage unit 803. Figure 8 The structure diagram shown can be used to illustrate the structure of the first network device, the second network device, and the terminal involved in the above embodiments.

[0381] When Figure 8 When the structure diagram shown is used to illustrate the structure of the first network device involved in the above embodiments, the processing unit 801 is configured to control and manage the actions of the first network device. For example, the processing unit 801 is configured to support the first network device to perform Figure 5 501-503 in FIG. 5, Figure 6 602, 606-608 in FIG. 6 (at this time, the first network device is PCF in the figure), Figure 7 702-705 in FIG. 7 (at this time, the first network device is PCF in the figure), and / or the actions of the first network device in other processes described in the embodiments of the present application. The processing unit 801 can communicate with other network entities through the communication unit 802, such as Figure 5The storage unit 803 is used to store program codes and data of the first network device.

[0382] when Figure 8 When the structural diagram shown is used to illustrate the structure of the first network device involved in the above embodiment, the network policy determination device 80 can be a device or a chip in the device.

[0383] when Figure 8 The schematic diagram shown in the structure is used to illustrate the structure of the second network device involved in the above embodiment. The processing unit 801 is used to control and manage the actions of the second network device. For example, the processing unit 801 is used to support the second network device to execute Figure 6 602 to 606 in (in this case, the second network device is NWDAF), and / or actions performed by the second network device in other processes described in the embodiments of the present application. The processing unit 801 can communicate with other network entities through the communication unit 802, for example, Figure 6 The storage unit 803 is used to store program codes and data of the second network device.

[0384] when Figure 8 When the structural diagram shown is used to illustrate the structure of the second network device involved in the above embodiment, the network policy determination device 80 can be a device or a chip in the device.

[0385] when Figure 8 The schematic diagram of the structure shown is used to illustrate the structure of the terminal (for example, the first terminal) involved in the above embodiment. The processing unit 801 is used to control and manage the actions of the terminal. For example, the processing unit 801 is used to support the terminal to execute Figure 5 505 and 506 in (in this case, the terminal is the first terminal in the figure), Figure 6 610 and 611 in (in this case, the terminal is the first terminal in the figure), Figure 7 701, 702, 704, 707 and 708 (in this case, the terminal is the first terminal in the figure), and / or actions performed by the terminal in other processes described in the embodiments of the present application. The processing unit 801 can communicate with other network entities through the communication unit 802, for example, Figure 5 The storage unit 803 is used to store program codes and data of the terminal.

[0386] when Figure 8 When the structural diagram shown is used to illustrate the structure of the terminal involved in the above embodiment, the network policy determination device 80 can be a device or a chip in the device.

[0387] Figure 8 The units in the above embodiments can be stored in a computer-readable storage medium if the units are implemented in the form of software function modules and sold or used as independent products. Based on such an understanding, the technical solutions of the embodiments of the present application essentially or partially, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods in the embodiments of the present application. The storage medium storing the computer software product includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and various other media capable of storing program codes.

[0388] Figure 8 The units in the above embodiments can also be referred to as modules, for example, the processing unit can be referred to as a processing module.

[0389] Figure 9 FIG. 9 is a schematic diagram of a hardware structure of a network policy determination apparatus 90 provided by the embodiments of the present application. The network policy determination apparatus 90 includes one or more processors 901 and a communication interface 903.

[0390] Optionally, the network policy determination apparatus 90 further includes a memory 904, which can include a read-only memory and a random access memory, and provides the processor 901 with operation instructions and data. A part of the memory 904 can also include a non-volatile random access memory (NVRAM).

[0391] In the embodiments of the present application, the network policy determination apparatus 90 performs corresponding operations by calling operation instructions (which can be stored in an operating system) stored in the memory 904.

[0392] The processor 901 can also be referred to as a central processing unit (CPU).

[0393] The processor 901, the communication interface 903, and the memory 904 are coupled together through a bus system 902, where the bus system 902 can include, in addition to a data bus, a power supply bus, a control bus, and a state signal bus, etc. However, for the purpose of clear illustration, all kinds of buses are marked as the bus system 902 in the above embodiments. Figure 9

[0394] ​The method disclosed in the embodiments of the present application can be applied to the processor 901 or implemented by the processor 901. The processor 901 can be an integrated circuit chip having a signal processing capability. In the implementation process, the steps of the method can be completed by hardware integrated logic circuits in the processor 901 or by instructions in the form of software. The processor 901 described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, or other mature storage media in the art. The storage medium is located in the storage 904, and the processor 901 reads the information in the storage 904 and combines the hardware to complete the steps of the above method.

[0395] The exemplary, Figure 9 The structure diagram shown can be used to illustrate the structure of the first network device, the second network device and the terminal involved in the above embodiments.

[0396] When Figure 9 When the structure diagram shown is used to illustrate the structure of the first network device involved in the above embodiments, the processor 901 is configured to control and manage the actions of the first network device, for example, the processor 901 is configured to support the first network device to perform Figure 5 501-503 in the method, Figure 6 602, 606-608 in the method (at this time, the first network device is the PCF in the figure), Figure 7 702-705 in the method (at this time, the first network device is the PCF in the figure), and / or the actions performed by the first network device in other processes described in the embodiments of the present application. The processor 901 can communicate with other network entities through the communication interface 903, for example, communicate with the access network devices shown in Figure 5 The storage 904 is configured to store the program code and data of the first network device.

[0397] When Figure 9The schematic diagram shown in the structure is used to illustrate the structure of the second network device involved in the above embodiment. The processor 901 is used to control and manage the actions of the second network device. For example, the processor 901 is used to support the second network device to execute Figure 6 602 to 606 (in this case, the second network device is NWDAF), and / or actions performed by the second network device in other processes described in the embodiments of the present application. The processor 901 can communicate with other network entities through the communication interface 903, for example, Figure 6 The memory 904 is used to store program codes and data of the second network device.

[0398] when Figure 9 The schematic diagram of the structure shown is used to illustrate the structure of the terminal (for example, the first terminal) involved in the above embodiment. The processor 901 is used to control and manage the actions of the terminal. For example, the processor 901 is used to support the terminal to execute Figure 5 505 and 506 in (in this case, the terminal is the first terminal in the figure), Figure 6 610 and 611 in (in this case, the terminal is the first terminal in the figure), Figure 7 701, 702, 704, 707 and 708 (in this case, the terminal is the first terminal in the figure), and / or actions performed by the terminal in other processes described in the embodiments of the present application. The processor 901 can communicate with other network entities through the communication interface 903, for example, Figure 5 The memory 904 is used to store program codes and data of the terminal.

[0399] The communication unit or communication interface may be an interface circuit or communication interface of the device, used to receive signals from other devices. For example, when the device is implemented as a chip, the communication unit or communication interface is an interface circuit or communication interface used by the chip to receive or send signals from other chips or devices.

[0400] In the above embodiment, the instructions stored in the memory for execution by the processor may be implemented in the form of a computer program product. The computer program product may be pre-written in the memory or downloaded and installed in the memory in the form of software.

[0401] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that the computer can store or be integrated into a data storage device such as a server, data center, etc. including one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0402] Optionally, the embodiments of the present application further provide a computer readable storage medium, wherein the computer readable storage medium stores computer instructions; when the computer readable storage medium runs on the computer, the computer executes any one of the methods provided by the embodiments of the present application.

[0403] The embodiments of the present application further provide a computer program product including computer instructions, which, when running on a computer, enables the computer to execute any one of the methods provided by the embodiments of the present application.

[0404] The embodiments of the present application further provide a chip, which includes a processor, and the processor executes instructions to enable the chip to execute any one of the methods provided by the embodiments of the present application.

[0405] In the above embodiments, all or part can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium, or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer or include one or more data storage devices such as servers, data centers, etc. that can be integrated with the medium. The available medium can be magnetic medium (such as floppy disk, hard disk, magnetic tape), optical medium (such as DVD), or semiconductor medium (such as SSD) and the like.

[0406] Although the present application is described herein in conjunction with various embodiments, it is understood that other variations of the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from an inspection of the drawings, the disclosure, and the appended claims. The word "comprising" does not exclude other components or steps not listed in the claims, "a" or "an" does not exclude a plurality, and a single processor or other unit can fulfill the functions of several means recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to an advantage.

[0407] Although the present application is described herein in conjunction with various embodiments, it is understood that other variations of the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from an inspection of the drawings, the disclosure, and the appended claims. The word "comprising" does not exclude other components or steps not listed in the claims, "a" or "an" does not exclude a plurality, and a single processor or other unit can fulfill the functions of several means recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to an advantage.

[0407] Although the present application is described herein in conjunction with various embodiments, it is understood that other variations of the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from an inspection of the drawings, the disclosure, and the appended claims. The word "comprising" does not exclude other components or steps not listed in the claims, "a" or "an" does not exclude a plurality, and a single processor or other unit can fulfill the functions of several means recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to an advantage.

Claims

1. A method for determining a selection strategy, characterized in that Comprise: The first terminal sends data related to the network selection of the first terminal to the third network device, wherein the data related to the network selection of the first terminal is used to determine the first network selection preference information, the first network selection preference information is the network selection preference information of the first terminal, the first network selection preference information comprises a learning result obtained after learning the data related to the network selection of the terminal, and the first network selection preference information is used to determine the network selection strategy; The data related to the network selection of the first terminal comprises one or more of the following information: the operation behavior of the first terminal related to the network standard, the network selection information autonomously determined by the first terminal, the network standard in which the first terminal resides, the user package of the first terminal, the complaint information of the first terminal related to the network standard, the time information corresponding to the first information, the location information corresponding to the first information, and the service information corresponding to the first information. The first information comprises one or more of the following information: the operation behavior of the first terminal related to the network standard, the network selection information autonomously determined by the first terminal, the network standard in which the first terminal resides, the user package of the first terminal, and the complaint information of the first terminal related to the network standard.

2. The method of claim 1, wherein, The network selection strategy is used to determine the wireless management strategy of the first terminal.

3. The method according to claim 1 or 2, characterized in that, The network selection information autonomously determined by the first terminal comprises at least one of the following information: the target network information autonomously determined by the first terminal, the reason why the first terminal selects the target network, the priority of the frequency point autonomously determined by the first terminal, the information of the first target cell autonomously determined by the first terminal, and the reason why the first terminal selects the first target cell.

4. The method of claim 3, wherein, The reason why the first terminal selects the target network comprises at least one of the following reasons: the access success rate of the source network is less than or equal to a first threshold value, the power consumption of the first terminal during access to the source network is greater than or equal to a second threshold value, and the service quality value during access to the source network is less than or equal to a third threshold value. And / or, the reason why the first terminal selects the first target cell comprises at least one of the following reasons: the access success rate of the second target cell is less than or equal to a fourth threshold value, the first terminal cannot display an icon for identifying a first standard network on the second target cell, and the second target cell is another cell accessible to the first terminal except the first target cell.

5. The method of claim 1, 2, or 4, wherein, The first network selection preference information comprises one or more of the following information: the network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, the weight corresponding to each network selection consideration factor of the first terminal, the time information corresponding to the second information, the location information corresponding to the second information, and the service information corresponding to the second information. The second information comprises one or more of the following information: the network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and the weight corresponding to each network selection consideration factor of the first terminal.

6. The method of claim 3, wherein, The first network selection preference information includes one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, a weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the second preceding information, location information corresponding to the second preceding information, and service information corresponding to the second preceding information. The second preceding information includes one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and a weight corresponding to each of the at least one network selection consideration factor of the first terminal.

7. The method of claim 5, wherein The at least one network selection consideration factor of the first terminal includes at least one network selection consideration factor in an autonomous network selection process of the first terminal. The weight corresponding to each of the at least one network selection consideration factor of the first terminal includes a weight corresponding to each of the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

8. The method of claim 6, wherein The at least one network selection consideration factor of the first terminal includes at least one network selection consideration factor in an autonomous network selection process of the first terminal. The weight corresponding to each of the at least one network selection consideration factor of the first terminal includes a weight corresponding to each of the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

9. A method for determining a network selection strategy, characterized in that: including: The first network device obtains first network selection preference information, the first network selection preference information being network selection preference information of a first terminal, and the first network selection preference information including a learning result obtained by learning data related to terminal network selection; The first network device determines a network selection strategy according to the first network selection preference information; The data related to terminal network selection includes one or more of the following information: an operation behavior related to a network standard of the first terminal, network selection information autonomously determined by the first terminal, a network standard in which the first terminal resides, a user package of the first terminal, complaint information related to a network standard of the first terminal, time information corresponding to the first preceding information, location information corresponding to the first preceding information, and service information corresponding to the first preceding information. The first preceding information includes one or more of the following information: an operation behavior related to a network standard of the first terminal, network selection information autonomously determined by the first terminal, a network standard in which the first terminal resides, a user package of the first terminal, and complaint information related to a network standard of the first terminal.

10. The method of claim 9, wherein, The network selection strategy is used to determine a wireless management strategy of the first terminal.

11. The method according to claim 9 or 10, characterized in that The method further includes: The first network device sends a first request to a second network device, the first request being used to obtain network selection preference information of the first terminal; The first network device obtains the first network selection preference information, including: the first network device receiving the first network selection preference information from the second network device.

12. The method of claim 11, wherein, The first request includes an analysis identifier, and the analysis identifier is used to indicate analysis of network selection preference.

13. The method of claim 12, wherein, The first request further comprises at least one of the following information: an identifier of the first terminal, location area information corresponding to the analysis identifier, time period information corresponding to the analysis identifier, application identifier corresponding to the analysis identifier, slice information corresponding to the analysis identifier, and data network information corresponding to the analysis identifier.

14. The method of claim 9, 10, 12, or 13, wherein, The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal.

15. The method of claim 11, wherein, The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal.

16. The method of claim 9, 10, 12, 13, or 15, wherein, The first network device acquires first network selection preference information, including:

17. The method of claim 11, wherein, The first network device receives the first network selection preference information from the first terminal.

18. The method of claim 14, wherein, The first network device acquires first network selection preference information, including:

19. The method of claim 16, wherein, The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including:

20. The method of claim 17 or 18, wherein, The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. 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The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device acquires first network selection preference information, including: The first network device receives the first network selection preference information from the first terminal. The first network device And / or, the reason for the first terminal selecting the first target cell comprises at least one of the following reasons: an access success rate of a second target cell is less than or equal to a fourth threshold value, the first terminal cannot display an icon for identifying a first mode network on the second target cell, and the second target cell is a cell other than the first target cell and accessible by the first terminal.

21. The method of any one of claims 9, 10, 12, 13, 15, 17-19, wherein, The data related to terminal network selection comprises one or more of the following information: operation behavior of a plurality of terminals related to network mode, network selection information autonomously determined by the plurality of terminals, network mode in which the plurality of terminals camp, user package of the plurality of terminals, complaint information of the plurality of terminals related to network mode, time information corresponding to the third aforementioned information, location information corresponding to the third aforementioned information, and service information corresponding to the third aforementioned information; wherein the plurality of terminals are related to the first terminal, and the third aforementioned information comprises one or more of the following: operation behavior of a plurality of terminals related to network mode, network selection information autonomously determined by the plurality of terminals, network mode in which the plurality of terminals camp, user package of the plurality of terminals, and complaint information of the plurality of terminals related to network mode.

22. The method of claim 11, wherein, The data related to terminal network selection comprises one or more of the following information: operation behavior of a plurality of terminals related to network mode, network selection information autonomously determined by the plurality of terminals, network mode in which the plurality of terminals camp, user package of the plurality of terminals, complaint information of the plurality of terminals related to network mode, time information corresponding to the third aforementioned information, location information corresponding to the third aforementioned information, and service information corresponding to the third aforementioned information; wherein the plurality of terminals are related to the first terminal, and the third aforementioned information comprises one or more of the following: operation behavior of a plurality of terminals related to network mode, network selection information autonomously determined by the plurality of terminals, network mode in which the plurality of terminals camp, user package of the plurality of terminals, and complaint information of the plurality of terminals related to network mode.

23. The method of claim 14, wherein, The data related to terminal network selection comprises one or more of the following information: operation behavior of a plurality of terminals related to network mode, network selection information autonomously determined by the plurality of terminals, network mode in which the plurality of terminals camp, user package of the plurality of terminals, complaint information of the plurality of terminals related to network mode, time information corresponding to the third aforementioned information, location information corresponding to the third aforementioned information, and service information corresponding to the third aforementioned information; wherein the plurality of terminals are related to the first terminal, and the third aforementioned information comprises one or more of the following: operation behavior of a plurality of terminals related to network mode, network selection information autonomously determined by the plurality of terminals, network mode in which the plurality of terminals camp, user package of the plurality of terminals, and complaint information of the plurality of terminals related to network mode.

24. The method of claim 16, wherein, The data related to the terminal network selection includes one or more of the following information: operation behaviors related to the network standard of multiple terminals, network selection information independently determined by the multiple terminals, network standards in which the multiple terminals reside, user packages of the multiple terminals, complaint information related to the network standard of the multiple terminals, time information corresponding to the third aforementioned information, location information corresponding to the third aforementioned information, and service information corresponding to the third aforementioned information; wherein, the multiple terminals are related to the first terminal, and the third aforementioned information includes: operation behaviors related to the network standard of multiple terminals, network selection information independently determined by the multiple terminals, network standards in which the multiple terminals reside, user packages of the multiple terminals, and complaint information related to the network standard of the multiple terminals.

25. The method of claim 20, wherein, The data related to the terminal network selection includes one or more of the following information: operation behaviors related to the network standard of multiple terminals, network selection information independently determined by the multiple terminals, network standards in which the multiple terminals reside, user packages of the multiple terminals, complaint information related to the network standard of the multiple terminals, time information corresponding to the third aforementioned information, location information corresponding to the third aforementioned information, and service information corresponding to the third aforementioned information; wherein, the multiple terminals are related to the first terminal, and the third aforementioned information includes: operation behaviors related to the network standard of multiple terminals, network selection information independently determined by the multiple terminals, network standards in which the multiple terminals reside, user packages of the multiple terminals, and complaint information related to the network standard of the multiple terminals.

26. The method of any one of claims 9, 10, 12, 13, 15, 17-19, 22-25, wherein, The first network selection preference information includes one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, weights corresponding to the at least one network selection consideration factor of the first terminal, time information corresponding to the second aforementioned information, location information corresponding to the second aforementioned information, and service information corresponding to the second aforementioned information; The second aforementioned information includes: one or more of: the network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and the weight corresponding to the at least one network selection consideration factor of the first terminal.

27. The method of claim 11, wherein, The first network selection preference information includes one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, weights corresponding to the at least one network selection consideration factor of the first terminal, time information corresponding to the second aforementioned information, location information corresponding to the second aforementioned information, and service information corresponding to the second aforementioned information; The second aforementioned information includes: one or more of: the network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and the weight corresponding to the at least one network selection consideration factor of the first terminal.

28. The method of claim 14, wherein, The first network selection preference information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, a weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the second preceding information, location information corresponding to the second preceding information, and service information corresponding to the second preceding information. The second preceding information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and a weight corresponding to each of the at least one network selection consideration factor of the first terminal.

29. The method of claim 16, wherein, The first network selection preference information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, a weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the second preceding information, location information corresponding to the second preceding information, and service information corresponding to the second preceding information. The second preceding information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and a weight corresponding to each of the at least one network selection consideration factor of the first terminal.

30. The method of claim 20, wherein, The first network selection preference information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, a weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the second preceding information, location information corresponding to the second preceding information, and service information corresponding to the second preceding information. The second preceding information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and a weight corresponding to each of the at least one network selection consideration factor of the first terminal.

31. The method of claim 21, wherein, The first network selection preference information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, a weight corresponding to each of the at least one network selection consideration factor of the first terminal, time information corresponding to the second preceding information, location information corresponding to the second preceding information, and service information corresponding to the second preceding information. The second preceding information comprises one or more of the following information: a network standard preferred by the first terminal, at least one network selection consideration factor of the first terminal, and a weight corresponding to each of the at least one network selection consideration factor of the first terminal.

32. The method of claim 26, wherein The at least one network selection consideration factor of the first terminal comprises at least one network selection consideration factor in an autonomous network selection process of the first terminal. The weight corresponding to each of the at least one network selection consideration factor of the first terminal comprises a weight corresponding to each of the at least one network selection consideration factor in the autonomous network selection process of the first terminal.

33. The method of any one of claims 27-31, wherein The at least one network selection consideration factor of the first terminal comprises at least one network selection consideration factor in a self-determined network selection process of the first terminal. The weight corresponding to each of the at least one network selection consideration factor of the first terminal comprises a weight corresponding to each of the at least one network selection consideration factor in the self-determined network selection process of the first terminal.

34. The method of any one of claims 9, 10, 12, 13, 15, 17-19, 22-25, 27-32, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

35. The method of claim 11, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

36. The method of claim 14, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

37. The method of claim 16, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

38. The method of claim 20, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

39. The method of claim 21, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

40. The method of claim 26, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

41. The method of claim 33, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

42. The method of any one of claims 9, 10, 12, 13, 15, 17-19, 22-25, 27-32, 35-41, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

43. The method of claim 11, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

44. The method of claim 14, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

45. The method of claim 16, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

46. The method of claim 20, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

47. The method of claim 21, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

48. The method of claim 26, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal.

49. The method of claim 33, wherein, The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device accessed by the first terminal. The method further comprises: The first network device sends the network selection policy to an access network device The first network device determines the network selection strategy according to the first network selection preference information and the service analysis result of the first terminal.

50. The method of claim 34, wherein, The first network device determines the network selection strategy according to the first network selection preference information, comprising: The first network device determines the network selection strategy according to the first network selection preference information and the service analysis result of the first terminal.

51. The method of any one of claims 9, 10, 12, 13, 15, 17-19, 22-25, 27-32, 35-41, 43-50, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

52. The method of claim 11, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

53. The method of claim 14, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

54. The method of claim 16, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

55. The method of claim 20, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

56. The method of claim 21, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

57. The method of claim 26, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

58. The method of claim 33, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to perform network selection according to the network selection information issued by the network, or the indication information being used to instruct that the network selection information issued by the network is determined based on the network selection preference information of the first terminal.

59. The method of claim 34, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to select a network according to network-deployed network selection information, or the indication information being used to instruct that the network-deployed network selection information is determined based on network selection preference information of the first terminal.

60. The method of claim 42, wherein, The method further comprises: The first network device sends indication information to the first terminal, the indication information being used to instruct the first terminal to select a network according to network-deployed network selection information, or the indication information being used to instruct that the network-deployed network selection information is determined based on network selection preference information of the first terminal.

61. The method of any one of claims 9, 10, 12, 13, 15, 17-19, 22-25, 27-32, 35-41, 43-50, 52-60, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

62. The method of claim 11, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

63. The method of claim 14, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

64. The method of claim 16, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

65. The method of claim 20, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

66. The method of claim 21, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

67. The method of claim 26, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

68. The method of claim 33, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

69. The method of claim 34, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

70. The method of claim 42, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

71. The method of claim 51, wherein, The first network device is a policy control network element, and the second network device is a data analysis network element.

72. An apparatus for determining a net selection strategy, the apparatus comprising: The first network device is a policy control network element, and the second network device is a data analysis network element. Comprise:

73. A device for determining a network selection strategy, characterized in that: A functional unit for performing the method of any one of claims 1-8, or a functional unit for performing the method of any one of claims 9-71; wherein the actions performed by the functional unit are implemented by hardware or corresponding software executed by hardware. Comprise: A processor coupled with a memory; The memory is used to store computer-executed instructions, and the processor executes the computer-executed instructions stored in the memory, so that the apparatus implements the method of any one of claims 1-8, or implements the method of any one of claims 9-71.

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