CN116847327A

CN116847327A - Network switching method, device, network element, entity, server and storage medium

Info

Publication number: CN116847327A
Application number: CN202210293931.XA
Authority: CN
Inventors: 崇卫微
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2023-10-03

Abstract

The application discloses a network switching method, a device, a network element, an entity, a server and a storage medium, belonging to the technical field of communication, wherein the network switching method of the embodiment of the application comprises the following steps: the policy control function network element PCF of the first network updates the first radio access type/frequency selection priority RFSP information of the terminal; and the PCF forwards the updated first RFSP information to a mobile management entity MME of a second network corresponding to the terminal through a home subscriber server HSS of the second network.

Description

Network switching method, device, network element, entity, server and storage medium

Technical Field

The application belongs to the technical field of communication, and particularly relates to a network switching method, a device, a network element, an entity, a server and a storage medium.

Background

The wireless access type/frequency selective priority (Radio Access Technology/Frequency Selection Priority, RFSP) index policy formulated by the policy control function network element (Policy Control Function, PCF) may enable the terminal to switch between interworking between 5G and 4G networks, or between different frequency points of the same network. However, if the mobile management entity (Mobility Management Entity, MME) cannot acquire the dynamically updated RFSP index, the MME cannot trigger the terminal to access the frequency point with the highest priority corresponding to the updated RFSP index in time, so that the communication quality cannot be guaranteed.

Disclosure of Invention

The embodiment of the application provides a network switching method, a device, a network element, an entity, a server and a storage medium, which can solve the problem that an MME can not trigger a terminal to access an updated frequency point with highest priority corresponding to RFSP index in time, and the communication quality can not be guaranteed.

In a first aspect, a network handover method is provided, the method including:

the policy control function network element PCF of the first network updates the first radio access type/frequency selection priority RFSP information of the terminal;

and the PCF forwards the updated first RFSP information to a mobile management entity MME of a second network corresponding to the terminal through a home subscriber server HSS of the second network.

In a second aspect, a network handover method is provided, the method including:

a Mobility Management Entity (MME) of a second network acquires updated first RFSP information of a terminal from a Home Subscriber Server (HSS) of the second network, wherein the updated first RFSP information is updated for the terminal by a policy control function network element (PCF) of the first network;

and the MME updates second RFSP information of the terminal according to the updated first RFSP information, wherein the second RFSP information is RFSP information which should be used by the terminal.

In a third aspect, a network handover method is provided, the method including:

the home subscriber server HSS of the second network receives updated first RFSP information of a terminal, wherein the updated first RFSP information is updated for the terminal by a policy control function network element PCF of the first network;

the HSS sends the updated first RFSP information to an MME of a second network, wherein the updated first RFSP information is used for updating second RFSP information of the terminal, and the second RFSP information is RFSP information which should be used by the terminal.

In a fourth aspect, there is provided a network switching apparatus, the apparatus comprising:

a first updating module, configured to update RFSP information of a first radio access type/frequency selection priority of a terminal;

and the first sending module is used for forwarding the updated first RFSP information to a mobile management entity MME of the second network corresponding to the terminal through a home subscriber server HSS of the second network.

In a fifth aspect, there is provided a network switching apparatus, the apparatus comprising:

a first obtaining module, configured to obtain updated first RFSP information of a terminal from a home subscriber server HSS of the second network, where the updated first RFSP information is updated by a policy control function network element PCF of the first network for the terminal;

And the second updating module is used for updating second RFSP information of the terminal according to the updated first RFSP information, wherein the second RFSP information is RFSP information which should be used by the terminal.

In a sixth aspect, there is provided a network switching apparatus, the apparatus comprising:

a first receiving module, configured to receive updated first RFSP information of a terminal, where the updated first RFSP information is updated by a policy control function network element PCF of a first network for the terminal;

and the second sending module is used for sending the updated first RFSP information to an MME of a second network, wherein the updated first RFSP information is used for updating second RFSP information of the terminal, and the second RFSP information is RFSP information which should be used by the terminal.

In a seventh aspect, a PCF network element is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which program or instructions when executed by the processor implement the steps of the method according to the first aspect.

In an eighth aspect, a PCF network element is provided, including a processor and a communication interface, where the processor is configured to: updating the first radio access type/frequency selection priority RFSP information of a terminal, wherein the communication interface is used for forwarding the updated first RFSP information to a Mobility Management Entity (MME) of a second network corresponding to the terminal through a Home Subscriber Server (HSS) of the second network.

In a ninth aspect, there is provided a mobility management entity MME comprising a processor and a memory storing a program or instructions executable on said processor, said program or instructions implementing the steps of the method according to the second aspect when executed by said processor.

In a tenth aspect, a mobility management entity MME is provided, including a processor and a communication interface, where the communication interface is configured to obtain updated first RFSP information of a terminal from a home subscriber server HSS of the second network, where the updated first RFSP information is updated by a policy control function network element PCF of the first network for the terminal; the processor is used for: and updating second RFSP information of the terminal according to the updated first RFSP information, wherein the second RFSP information is RFSP information which the terminal should use.

In an eleventh aspect, there is provided a home subscriber server HSS comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the method according to the third aspect.

A twelfth aspect provides a home subscriber server HSS, including a processor and a communication interface, where the communication interface is configured to receive updated first RFSP information of a terminal, where the updated first RFSP information is updated by a policy control function network element PCF of a first network for the terminal; and sending the updated first RFSP information to an MME of a second network, wherein the updated first RFSP information is used for updating second RFSP information of the terminal, and the second RFSP information is RFSP information which should be used by the terminal.

In a thirteenth aspect, there is provided a network switching system, including: PCF network element, mobility management entity MME and home subscriber server HSS, the PCF network element being operable to perform a network handover method according to the first aspect, the mobility management entity MME being operable to perform a network handover method according to the second aspect, and the home subscriber server HSS being operable to perform a network handover method according to the third aspect.

In a fourteenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, implement the method according to the first aspect, or implement the method according to the second aspect, or implement the method according to the third aspect.

In a fifteenth aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions to implement the method according to the first aspect, or to implement the method according to the second aspect, or to implement the method according to the third aspect.

In a sixteenth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executable by at least one processor to perform the steps of the method as described in the first aspect, or to perform the steps of the method as described in the second aspect, or to perform the steps of the method as described in the third aspect.

In the embodiment of the application, the updated first RFSP information is forwarded to the mobile management entity MME of the second network through the HSS of the second network, so that the MME of the second network can timely acquire the dynamically updated RFSP information and timely trigger the terminal to access the better frequency point corresponding to the updated RFSP, thereby effectively guaranteeing the communication quality.

Drawings

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable;

FIG. 2 is a schematic diagram of a 5G and 4G interworking architecture provided by the related art;

fig. 3 is a schematic flow chart of a network switching method according to an embodiment of the present application;

FIG. 4 is a second flowchart of a network switching method according to an embodiment of the present application;

fig. 5 is a third flow chart of a network switching method according to an embodiment of the application;

fig. 6 is a flowchart of a network switching method according to an embodiment of the present application;

fig. 7 is a flowchart of a network switching method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network switching device according to an embodiment of the present application;

FIG. 9 is a second schematic diagram of a network switching device according to an embodiment of the present application;

fig. 10 is a third schematic diagram of a network switching device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic diagram of a hardware structure of a PCF network element provided in an embodiment of the present application;

fig. 13 is a schematic hardware structure of a mobility management entity MME according to an embodiment of the present application;

fig. 14 is a schematic hardware structure of a home subscriber server HSS according to an embodiment of the application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a 5G system for purposes of example and uses 5G terminology in much of the description that follows, but the techniques are also applicable to applications other than 5G system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in a 5G system is described as an example, and the specific type of the base station is not limited. The core network device may include, but is not limited to, at least one of: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), user plane functions (User Plane Function, UPF), policy control functions (Policy Control Function, PCF), policy and charging rules function units (Policy and Charging Rules Function, PCRF), edge application service discovery functions (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data repository (Unified Data Repository, UDR), home subscriber server (Home Subscriber Server, HSS), centralized network configuration (Centralized network configuration, CNC), network storage functions (Network Repository Function, NRF), network opening functions (Network Exposure Function, NEF), local NEF (or L-NEF), binding support functions (Binding Support Function, BSF), application functions (Application Function, AF), and the like. It should be noted that, in the embodiment of the present application, only the core network device in the 5G system is described as an example, and the specific type of the core network device is not limited.

The following is first introduced:

fig. 2 is a schematic diagram of a 5G and 4G interworking architecture provided by the related art, as shown in fig. 2, a 5G access and mobility management function network element (Access and Mobility Management Function, AMF) may obtain RFSP index information of a terminal subscription from a unified data management network element (Unified Data Management, UDM), and set RFSP index (RFSP index in use) needed to be used by the terminal according to the RFSP index information of the terminal subscription and a local policy. Typically both are set to the same value.

The AMF may send RFSP index (RFSP index in use) used by the terminal to the PCF to decide whether a change is needed.

The PCF sets an authorized RFSP index (authorized RFSP index) based on local policies or other information (e.g., data analysis information obtained from the network data analysis function (Network Data Analytics Function, NWDAF), traffic information sent by the application function (Application Function, AF), etc.), and sends authorized RFSP index to the AMF for updating RFSP index in use. For example, the AMF sets RFSP index in use to authorized RFSP index.

The 4G PCRF does not have the mechanism for dynamically making the UE RFSP index strategy;

there is no interface between the 4G PCRF and the mobility management entity (Mobility Management Entity, MME), and the PCRF cannot notify the MME of the update of the RFSP index policy.

The network switching method, device, network element, entity, server and storage medium provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings through some embodiments and application scenarios thereof.

Fig. 3 is a flow chart of a network switching method according to an embodiment of the present application, as shown in fig. 3, the method includes the following steps:

step 300, the policy control function network element PCF of the first network updates the first radio access type/frequency selection priority RFSP information of the terminal;

in step 310, the PCF forwards the updated first RFSP information to a mobility management entity MME of the second network corresponding to the terminal through a home subscriber server HSS of the second network.

Specifically, as the subscription information of the terminal, subscription RFSP information (subscribed RFSP index) is set to a suitable value so that the 5G terminal resides in a RAT (e.g., lte or NR)/frequency point (e.g., 5G different frequency point) corresponding to the 5G network. The RFSP index policy formulated by the PCF may require the terminal to interwork between the 5G and 4G networks.

For example, the subscribed RFSP index value may be one of 0-255, where each of 0-255 corresponds to a specific frequency priority, so that the terminal resides in a suitable frequency network.

For example, the RFSP index corresponds to a high 4G network frequency point priority, so that the terminal is switched into the 4G network from the 5G network, but the 4G network generally sets that the 5G terminal is preferentially switched into the 5G network according to the 5G subscription information of the terminal, and the MME cannot acquire the RFSP index from the dynamic update, so that the MME triggers the terminal to be switched into the 5G network again, and a ping-pong phenomenon occurs between the 5G network and the 4G network.

For example, in a scenario that a 5G terminal accesses a 4G network, an MME cannot dynamically trigger the terminal to access the 5G network in time according to a service (e.g., a 5G XR service) requirement, which affects service experience.

Therefore, in order to ensure the communication quality, the MME needs to acquire the dynamically updated RFSP information in time, so after updating the first radio access type/frequency selection priority RFSP information of the terminal, the policy control function network element PCF of the first network may forward the updated first RFSP information to the mobility management entity MME of the second network corresponding to the terminal through the home subscriber server HSS of the second network.

Optionally, the updated first RFSP information is used to enable the MME to set a second RFSP used by the terminal according to the first RFSP, and enable the MME to send the second RFSP to the eNB, and the eNB triggers the terminal to access a network frequency point corresponding to the updated first RFSP information, for example, enable the terminal to switch from a frequency point (first frequency point) of the 4G network to a frequency point (second frequency point) of the 5G network, for example, enable the terminal to switch from the frequency point (first frequency point) of the 5G network to the frequency point (second frequency point) of the 4G network, for example, enable the terminal to switch from the first frequency point of the 4G network to the second frequency point of the 4G network.

Alternatively, the first network may be any mobile communication network;

alternatively, the second network may be any mobile communication network;

for example, the first network may be a 5G network and the second network may be a 4G network;

Optionally, the method further comprises:

the PCF determines that the terminal needs to access a second frequency point from the first frequency point.

Optionally, the PCF may determine that the terminal needs to access the second frequency point from the first frequency point when determining that the service to be executed by the terminal is more suitable to be executed in the second frequency point, or that the communication quality may be better after the terminal accesses the second frequency point;

alternatively, the first frequency point and the second frequency point may belong to the same mobile communication network;

optionally, the first frequency point and the second frequency point may belong to different mobile communication networks;

alternatively, the mobile communication network may be a PLMN.

Optionally, the first frequency point may be a frequency point corresponding to a first RAT or a first cell of the second network, and the second frequency point is a frequency point corresponding to a second RAT or a second cell of the second network;

optionally, the first frequency point may be a frequency point corresponding to a first RAT or a first cell of the first network, and the second frequency point is a frequency point corresponding to a second RAT or a second cell of the second network;

optionally, the first frequency point may be a frequency point corresponding to a first RAT or a first cell of the second network, and the second frequency point is a frequency point corresponding to the first RAT or the second cell of the first network;

for example, the first frequency point may be a frequency point corresponding to a first RAT or a first cell of the 4G network, and the second frequency band may be a frequency point corresponding to a second RAT or a second cell of the 4G network;

for example, the first frequency point may be a frequency point corresponding to a first RAT or a first cell of the 5G network, and the second frequency band may be a frequency point corresponding to a second RAT or a second cell of the 4G network;

for example, the first frequency point may be a frequency point corresponding to a first RAT or a first cell of the 4G network, and the second frequency band may be a frequency point corresponding to a second RAT or a second cell of the 5G network;

for example, the PCF may be triggered by a relevant factor, and in order to switch the terminal from 5G to 4G, it decides to adjust RFSP information (e.g. authorized RFSP index value or RFSP index in use value) corresponding to the terminal, i.e. update the first radio access type/frequency selection priority RFSP information of the terminal.

For example, the PCF may be triggered by a relevant factor, and in order to switch the terminal from 4G to 5G, it decides to adjust RFSP information (e.g. authorized RFSP index value or RFSP index in use value) corresponding to the terminal, i.e. update the first radio access type/frequency selection priority RFSP information of the terminal.

For example, the PCF may be triggered by a relevant factor, and to switch the terminal from one frequency point of the 4G to another frequency point of the 4G, it may decide to adjust RFSP information (e.g. authorized RFSP index value or RFSP index in use value) corresponding to the terminal, i.e. update the first radio access type/frequency selection priority RFSP information of the terminal.

Taking the example that the first frequency point is the frequency point corresponding to the 5G network and the second frequency point is the frequency point corresponding to the 4G network, the PCF determines that the terminal needs to execute a certain service type according to the service type change of the terminal, and the service type is more suitable for being executed in the 4G, so that the load of the 5G network can be reduced, and the service experience of the terminal can be ensured to be accepted by a user in the 4G network. Thus, the PCF may determine that the terminal needs to access a second frequency point from the first frequency point.

Taking the example that the first frequency point is the frequency point corresponding to the 4G network and the second frequency point is the frequency point corresponding to the 5G network, the PCF determines that the terminal is more suitable for communication in the 5G next according to the network performance prediction analysis result. Thus, the PCF may determine that the terminal needs to access a second frequency point from the first frequency point.

Taking the example that the first frequency point is a frequency point corresponding to the 4G network and the second frequency point is a frequency point corresponding to the 4G network, the PCF determines that the terminal is more suitable for communication in the second frequency point according to the network load analysis information. Thus, the PCF may determine that the terminal needs to access a second frequency point from the first frequency point.

Optionally, the policy control function network element PCF of the first network updates RFSP information of the first radio access type/frequency selection priority of the terminal, including:

the policy control function network element PCF sets the first RFSP information of the terminal to a first value, where the first value corresponds to a highest priority of the second frequency point.

Optionally, after determining that the terminal needs to access the second frequency point from the first frequency point, the PCF may update the first radio access type/frequency selection priority RFSP information of the terminal, set the first RFSP information of the terminal to a first value, where the first value may correspond to the first value so that the priority of the second frequency point is highest, for example, RFSP index value=255, and corresponds to the 4g 800m frequency point as the highest access priority, so that after receiving the updated first RFSP information, it may be ensured that the MME may trigger the second frequency point with the highest access priority to the terminal, and ensure communication quality.

Optionally, after determining that the terminal needs to access the second frequency point from the first frequency point, the PCF may start an AM policy modification procedure to provide the AMF with updated first RFSP information of the terminal.

Optionally, the first RFSP information includes an authorized RFSP index corresponding to the terminal or an RFSP index in use.

Optionally, the first RFSP information may include an authorized RFSP index corresponding to the terminal;

optionally, the authorized RFSP index may be updated;

optionally, the PCF may issue an authorized RFSP index (authorized RFSP index) to the AMF for the AMF to update the RFSP index in use (RFSP index in use) according to authorized RFSP index;

for example, the AMF reports subscribed RFSP index value =254 of the terminal to the PCF, and the PCF updates subscribed RFSP index value =250, and issues 250 values to the AMF, such that the AMF updates RFSP index in use =250.

Alternatively, the first RFSP information may include RFSP index in use;

alternatively, the RFSP index in use may be updated directly.

Optionally, the PCF forwards the updated first RFSP information to a mobility management entity MME of a second network corresponding to the terminal through a home subscriber server HSS of the second network, including:

The PCF sends the updated first RFSP information to the MME of the second network corresponding to the terminal through first equipment;

the first device is a combined device of the HSS and a unified data management function network element UDM.

Optionally, when forwarding the updated first RFSP information to the MME through the UDM, the PCF may first send the updated first RFSP information to the HSS;

optionally, the HSS may be combined with the UDM and set as the first device, and when the PCF sends the updated first RFSP information to the HSS, the PCF may be sent to the first device and forwarded to the MME of the second network corresponding to the terminal through the first device.

Optionally, after updating the first RFSP information, the PCF may notify the UDM of the updated first RFSP information, the UDM may send a notification message to further notify the HSS, and if the UDM and the HSS are co-configured, the notification message may be omitted or become notification information between internal modules of the device;

optionally, after updating the first RFSP information, the PCF may directly notify the first value of the updated first RFSP information when notifying the updated first RFSP information.

And the PCF forwards the updated first RFSP information to the HSS of the second network through a unified data management function network element UDM, so that the HSS sends the updated first RFSP information to the MME of the second network corresponding to the terminal.

optionally, the HSS and the unified data management function network element UDM may be deployed separately, and when the PCF sends the updated first RFSP information to the HSS, the PCF may first send the updated first RFSP information to the UDM, and the updated first RFSP information may be forwarded by the UDM to the HSS and forwarded by the HSS to the MME of the second network corresponding to the terminal.

Optionally, after updating the first RFSP information, the PCF may notify the UDM of the updated first RFSP information, the UDM may send a notification message to further notify the HSS, and if the UDM and the HSS are separately deployed, the UDM may send a notification message to further notify the HSS of the first value of the updated first RFSP information;

The PCF acquires first information;

the PCF updates first RFSP information of the terminal according to the first information to obtain updated first RFSP information;

wherein the first information includes at least one of:

the service type information initiated by the terminal;

predicting and analyzing results of terminal business behaviors;

predicting and analyzing the network performance;

network load analysis information;

and the service experience analysis information of the terminal.

Optionally, the PCF may update the first RFSP information of the terminal based on service type information initiated by the terminal, to obtain the updated first RFSP information;

optionally, the PCF may update the first RFSP information of the terminal based on the result of the terminal service behavior prediction analysis, to obtain the updated first RFSP information;

optionally, the PCF may update the first RFSP information of the terminal based on the network performance prediction analysis result, and obtain the updated first RFSP information;

optionally, the PCF may update the first RFSP information of the terminal based on the network load analysis information, and obtain the updated first RFSP information;

optionally, the PCF may update the first RFSP information of the terminal based on the service experience analysis information of the terminal, and obtain the updated first RFSP information;

Alternatively, the PCF may update the first RFSP information based on any combination of two or more pieces of information of the first information; for example, the PCF may update the first RFSP information based on the terminal-initiated traffic type information and the terminal traffic behavior prediction analysis result;

for example, the PCF may update the first RFSP information based on the terminal traffic behavior prediction analysis result and the network performance prediction analysis result;

for example, the PCF may update the first RFSP information based on the terminal-initiated traffic type information, the terminal traffic behavior prediction analysis result, and the network performance prediction analysis result;

for example, the PCF may determine that the terminal needs to perform a certain service type according to the service type change of the terminal, where the service type is more suitable for being performed in the second network, so that the load of the first network can be reduced, and the service experience of the terminal can be guaranteed to be accepted by the user in the 4G network.

For example, the first frequency point is a frequency point corresponding to the 4G network, the second frequency point is a frequency point corresponding to the 5G network, and the PCF determines that the terminal is more suitable for communication in the 5G next according to the network performance prediction analysis result. Thus, the PCF may determine that the terminal needs to access a second frequency point from the first frequency point.

For example, the first frequency point is a frequency point corresponding to the 4G network, the second frequency point is a frequency point corresponding to the 4G network, and the PCF determines that the terminal is more suitable for communication in the second frequency point according to the network load analysis information. Thus, the PCF may determine that the terminal needs to access a second frequency point from the first frequency point.

For example, the PCF may decide to update the first RFSP information of the terminal based on the following input information:

various analysis and prediction results (such as 5G network congestion analysis results, terminal business experience analysis results, terminal business behavior analysis results and the like) based on NWDAF; or (b)

Service requests of an AF (e.g. AF requests to perform a certain service type).

Optionally, the PCF obtains first information, including:

the PCF obtains said first information from the network data analysis function network element NWDAF.

Optionally, the PCF obtains the first information from the network data analysis function network element NWDAF, for example, obtains various analysis and prediction results of the NWDAF, such as a 5G network congestion analysis result, a service experience analysis result of the terminal, a service behavior analysis result of the terminal, and so on from the network data analysis function network element NWDAF.

Optionally, the PCF obtains first information, including:

the PCF obtains the service type information initiated by the terminal from the application server or session management function network element SMF.

Optionally, the PCF may further obtain service type information initiated by the terminal from the application server or the SMF network element, and update the first RFSP information of the terminal based on the service type information initiated by the terminal, to obtain the updated first RFSP information.

Fig. 4 is a second flowchart of a network switching method according to an embodiment of the present application, as shown in fig. 4, the method includes the following steps:

step 400, a mobility management entity MME of a second network obtains updated first RFSP information of a terminal from a home subscriber server HSS of the second network, where the updated first RFSP information is updated by a policy control function network element PCF of the first network for the terminal;

in step 410, the MME updates second RFSP information of the terminal according to the updated first RFSP information, where the second RFSP information is RFSP information that should be used by the terminal.

Optionally, in order to ensure communication quality, the MME needs to learn dynamically updated RFSP information in time;

optionally, the MME may acquire updated first RFSP information of the terminal from a home subscriber server HSS of the second network, where the updated first RFSP information sent by the home subscriber server HSS is sent to the HSS after being updated by a policy control function network element PCF of the first network;

optionally, after updating the first radio access type/frequency selection priority RFSP information of the terminal, the policy control function network element PCF of the first network may forward the updated first RFSP information to the mobility management entity MME of the second network corresponding to the terminal through the home subscriber server HSS of the second network.

Optionally, the updated first RFSP information is used to enable the MME to set a second RFSP used by the terminal according to the first RFSP, and enable the MME to send the second RFSP to the eNB, and the eNB triggers the terminal to access a network frequency point corresponding to the updated first RFSP information.

Optionally, after receiving the updated first RFSP information, the MME may update RFSP information that should be used by the terminal, that is, the second RFSP information, according to the updated first RFSP information.

Alternatively, the first RFSP information and the second RFSP information may be the same information, for example, the first RFSP information and the second RFSP information may be RFSP index in use;

alternatively, the first RFSP information and the second RFSP information may be different information, for example, the first RFSP information is authorized RFSP index, and the second RFSP information is RFSP index in use;

alternatively, the first network may be any mobile communication network;

alternatively, the second network may be any mobile communication network;

Optionally, the method further comprises:

the MME sends the second RFSP information to an access network device eNB;

the second RFSP information is used for triggering the eNB to access the terminal from the first frequency point to the second frequency point.

Optionally, after receiving the updated first RFSP information, the MME may send the second RFSP information to the access network device eNB, where the eNB may set a second frequency point corresponding to the second RFSP information to be a high priority frequency point, and may trigger the terminal to access the second frequency point from the first frequency point.

In an alternative embodiment, the MME may set RFSP index (RFSP index in use) (second RFSP information) used in the 4G network to the received authorized RFSP index value (updated first RFSP information). For example, authorized RFSP index value =250, and its corresponding frequency point priority information indicates that 4g 800mhz is high priority. And MME settings RFSP index in use value = authorized RFSP index value =250. According to this setting, the MME subsequently sends RFSP index in use value =250 to the ENB, which sets the corresponding 4g 800mhz to high priority.

Optionally, the updated first RFSP information includes an authorized RFSP index or an in-use RFSP index corresponding to the terminal.

optionally, the type of the updated first RFSP information may be an updated authorized RFSP index;

Alternatively, the first RFSP information may include RFSP index in use;

alternatively, the type of the updated first RFSP information may be an updated RFSP index in use.

Optionally, the PCF may issue an updated authorized RFSP index (authorized RFSP index) to the AMF for the AMF to update the RFSP index in use (RFSP index in use) according to authorized RFSP index;

Optionally, the mobile management entity MME of the second network obtains updated first RFSP information of a terminal from a home subscriber server HSS of the second network, including:

the MME sends a location update request message of the terminal to an HSS;

and the MME receives a position update response message sent by the HSS, wherein the position update response message comprises the updated first RFSP information.

Optionally, after the AMF sets RFSP index in use of the terminal to the first value of the updated first RFSP information based on the AM policy modification procedure, the AMF may send the first value of RFSP index in use corresponding to the terminal to the NG RAN, for the NG RAN to set a corresponding frequency point priority for the terminal. The NG RAN sets corresponding frequency point priority for the terminal according to the value of RFSP index in use, and the frequency point priority is used for guiding the terminal to preferentially select a corresponding RAT/frequency point for residence;

For example, RFSP index in use =250, which corresponds to the 4g LTE 800m frequency point having the highest priority, there will be a limited choice of 4g LTE 800m frequency points for camping with the terminal. In general, the terminal may select a corresponding frequency point to reside through an idle state cell reselection method. Of course, in other modes, the network starts switching on the connection state terminal, or redirects the flow, and the terminal accesses the corresponding frequency point network by issuing the corresponding frequency point priority.

After the terminal accesses the 4G cell, the terminal executes a registration (TAU or Attach) process and acquires updated first RFSP information from the HSS;

optionally, the terminal performs a registration (TAU or Attach) procedure, when acquiring updated first RFSP information from the HSS, may be implemented when the MME initiates a location update request to the HSS;

optionally, when the terminal initiates the registration procedure, the MME may initiate a location update request message to the HSS, where the message is generally used for the MME to obtain subscription information about the terminal or for reporting current location information to the HSS, etc. The HSS may send a location update response message to the MME, and the HSS may carry the updated first RFSP information (e.g., authorized RFSP index value or RFSP index in use value), so as to achieve the purpose of sending the information to the MME.

Optionally, in the location update response message, the HSS may further carry information about a subscription RFSP index of the terminal in the 4G network, where the value may be different from the first RFSP index value.

Thus, the MME may send a location update request message for the terminal to the HSS; and the MME receives a position update response message sent by the HSS, wherein the position update response message comprises updated first RFSP information.

and the MME receives a user subscription data update message sent by the HSS, wherein the user subscription data update message comprises the updated first RFSP information.

Optionally, the MME may directly receive the user subscription data update message sent by the HSS;

optionally, after acquiring the updated first RFSP information, the HSS may send a notification message to the MME, carrying the updated first RFSP information, or carrying the first value of the updated first RFSP information;

optionally, the notification message may be a Insert Subscriber Data message, and the HSS may modify the updated user profile with the message, where the updated first RFSP information is carried, or the first value of the updated first RFSP information is carried, so as to achieve the purpose of sending the updated first RFSP information to the MME.

Optionally, the first frequency point is a frequency point corresponding to a first RAT or a first cell of the second network, and the second frequency point is a frequency point corresponding to a second RAT or a second cell of the second network; or (b)

The first frequency point is a frequency point corresponding to a first RAT or a first cell of the first network, and the second frequency point is a frequency point corresponding to a second RAT or a second cell of the second network; or (b)

The first frequency point is a frequency point corresponding to a first RAT or a first cell of the second network, and the second frequency point is a frequency point corresponding to the first RAT or the second cell of the first network.

for example, the PCF may be triggered by a related factor, and in order to switch the terminal from 5G to 4G, it decides to adjust RFSP information corresponding to the terminal (authorized RFSP index value), i.e. update the first radio access type/frequency selection priority RFSP information of the terminal.

Fig. 5 is a third flowchart of a network switching method according to an embodiment of the present application, as shown in fig. 5, the method includes the following steps:

step 500, a home subscriber server HSS of the second network receives updated first RFSP information of a terminal, where the updated first RFSP information is updated by a policy control function network element PCF of the first network for the terminal;

In step 510, the HSS sends the updated first RFSP information to an MME of the second network, where the updated first RFSP information is used to update second RFSP information of the terminal, and the second RFSP information is RFSP information that should be used by the terminal.

Optionally, in order to ensure the communication quality, the MME needs to be timely informed of dynamically updated RFSP information; therefore, after receiving the updated first RFSP information of the terminal, the HSS may send the updated first RFSP information to the MME of the second network;

Alternatively, the first network may be any mobile communication network;

alternatively, the second network may be any mobile communication network;

alternatively, the first RFSP information may include RFSP index in use;

Optionally, in the case that the HSS is not set together with the UDM, the HSS of the home subscriber server of the second network receives updated first RFSP information of the terminal, including:

and the HSS receives the updated first RFSP information sent by the PCF through the UDM.

Optionally, when the HSS is not configured with the UDM, the HSS may receive, through the UDM, the updated first RFSP information sent by the PCF, that is, when the PCF sends the updated first RFSP information to the HSS, the updated first RFSP information may be first sent to the UDM, forwarded by the UDM to the HSS, and forwarded by the HSS to the MME of the second network corresponding to the terminal.

Optionally, after updating the first RFSP information, the PCF may notify the updated first RFSP information or directly notify the first value of the updated first RFSP information when notifying the updated first RFSP information.

Optionally, when acquiring the updated first RFSP information, the HSS may acquire the updated first RFSP information, or directly acquire the first value of the updated first RFSP information

Optionally, in the case that the HSS is configured with the UDM, the HSS of the home subscriber server of the second network receives updated first RFSP information of the terminal, including:

the HSS receives the updated first RFSP information from the PCF.

Optionally, in the case that the HSS is co-located with the UDM, the HSS in the first device may directly receive the updated first RFSP information from the PCF;

Optionally, the HSS sends the updated first RFSP information to an MME of a second network, including:

the HSS receives a position update request message of the terminal sent by the MME;

and the HSS sends a position update response message to the MME, wherein the position update response message comprises the updated first RFSP information.

Optionally, after the AMF sets RFSP index in use of the terminal to the first value of the updated first RFSP information based on the AM policy modification procedure, the AMF may send RFSP index in use corresponding to the terminal to the NG RAN, where the NG RAN sets a corresponding frequency point priority for the terminal. The NG RAN sets corresponding frequency point priority for the terminal according to the value of RFSP index in use, and the frequency point priority is used for guiding the terminal to preferentially select a corresponding RAT/frequency point for residence;

optionally, when the terminal initiates the registration procedure, the MME may initiate a location update request message to the HSS, where the message is generally used for the MME to obtain subscription information about the terminal or for reporting current location information to the HSS;

optionally, the HSS may receive a location update request message of the terminal sent by the MME; transmitting a location update response message to the MME, wherein the location update response message comprises the updated first RFSP information; the HSS may send the location update response message to the MME, and the HSS may carry the updated first RFSP information (e.g., authorized RFSP index value), so as to achieve the purpose of sending the information to the MME.

and the HSS sends user subscription data information to the MME, wherein the user subscription data information comprises the updated first RFSP information.

In one embodiment a, taking a terminal currently residing in the 5G network as an example, in a process that the 5G PCF updates RFSP index (authorized RFSP index) to trigger the terminal to access to the 4G network, the 5G PCF notifies the 4G GMME of the updated RFSP index (authorized RFSP index) via the 4G HSS, so that the 4G network can accommodate the terminal to reside in the 4G network, and a ping-pong effect is avoided; fig. 6 is a fourth flowchart of a network switching method according to an embodiment of the present application, as shown in fig. 6, where the embodiment may include the following steps:

in step 601, the terminal registers to a 5G network flow, where the AMF acquires subscription RFSP information about the terminal from the UDM (subscribed RFSP index).

Specifically, the terminal registers to the 5GC through the NG-RAN, in which the AMF acquires subscription RFSP information about the terminal from the UDM (subscribed RFSP index). In general, as subscription information of the terminal, subscribed RFSP index is set to a suitable value, so that the 5G terminal resides in a RAT (such as lte or 5G)/frequency point (such as different frequency points of 5G) corresponding to the 5G network, for example, the subscribed RFSP index value may be a value of one of 0 to 255, where each value of 0 to 255 corresponds to a specific frequency point priority, so that the terminal resides in a suitable frequency point network.

The AMF sets a value of RFSP index in use for the registered terminal. Typically RFSP index in use is set to the same value as subscribed RFSP index, but in some cases the AMF may also alter the value of RFSP index in use according to local policies or other reference factors.

In the registration process, the AMF also establishes a mobile access management Policy AM Policy association with the PCF for the terminal. The AMF may report subscribed RFSP index to the PCF. The PCF may also decide to issue authorized RFSP index to the AMF (for the AMF to update RFSP index in use according to authorized RFSP index) according to the PCC policy corresponding to the terminal, local factors, etc., and may also use the value of subscribed RFSP index. For example, the AMF reports subscribed RFSP index value =254 of the terminal to the PCF, and the PCF updates subscribed RFSP index value =250, and issues 250 values to the AMF, such that the AMF updates RFSP index in use =250.

In step 602, in some scenarios, triggered by some factors, in order to make the terminal switch from 5G to 4G, the pcf decides to adjust the first RFSP information corresponding to the terminal.

For example, PCF determines, according to the service type change of the terminal, that the terminal needs to perform a certain service type, and the service type is more suitable for being performed in 4G, so that the load of the 5G network can be reduced, and the service experience of the terminal can be ensured to be accepted by the user in the 4G network.

In step 603, the pcf starts an AM policy modification procedure, and provides the updated first RFSP information of the terminal to the AMF.

Wherein the PCF sends an AM policy modification message to the AMF carrying updated authorization RFSP information (authorized RFSP index).

Correspondingly, the AMF sets the value of RFSP index in use of the terminal to the value of the updated first RFSP information.

In step 604, the amf sends RFSP index in use corresponding to the terminal to the NG RAN, where the NG RAN sets a corresponding frequency point priority for the terminal.

Wherein the AMF may carry the value of RFSP index in use by sending a terminal context modification message to the NG RAN.

The sending manner of the terminal corresponding to RFSP index in use sent by the AMF to the NG RAN may be any manner capable of informing the NG RAN of RFSP index in use, which is not limited in the embodiment of the present application.

The NG RAN may set, for the terminal, a corresponding frequency priority according to the value of RFSP index in use, where the frequency priority is used to instruct the terminal to preferentially select a corresponding RAT/frequency to camp on.

For example, RFSP index in use =250, which corresponds to the 4g LTE 800m frequency point having the highest priority, there will be a limited choice of 4g LTE 800m frequency points for camping with the terminal.

The terminal can select the corresponding frequency point to reside through an idle state cell reselection method.

Optionally, in any other way, the network starts switching on the connection state terminal, or redirects the flow, and the terminal accesses the corresponding frequency point network by issuing the corresponding frequency point priority.

Step 605, after step 602, the PCF may notify the UDM of the updated first RFSP information of the terminal;

for example, if the PCF determines that the authorized RFSP index value is different from the subscribed RFSP index value, the PCF may notify the UDM of the authorized RFSP index value;

wherein if the UDM and HSS are deployed separately, the UDM may send a notification message further informing the HSS of the authorized RFSP index value;

if the UDM and HSS are co-located, the notification message may be omitted or changed to notification information between the device internal modules.

Step 606, the terminal performs a cell reselection procedure, and accesses the 4G network.

In one implementation case, the NG RAN may determine that the frequency point priority changes according to the frequency point priority mapped by the RFSP index in use value in step 604, and then the NG RAN sends the updated frequency point priority to the terminal, so that the terminal accesses the 4G network in a redirection manner or a cell reselection manner; wherein, the NG RAN sends the updated frequency point priority to the terminal through RRC connection release message.

In another implementation, the NG RAN may determine that the frequency point priority changes according to the frequency point priority mapped by the RFSP index in use value in step 604, and trigger a handover procedure of the terminal, so that the terminal is handed over from the 5G network to the 4G network, and accesses the 4G cell.

In step 607, when the terminal accesses the 4G network cell, the terminal performs a registration (TAU or Attach) procedure, and acquires the updated authorized RFSP information (authorized RFSP index value) in step 5 from the HSS.

Specifically, when a terminal initiates a registration procedure to a 4G network, an MME initiates a location update request message to an HSS, where the message is generally used for the MME to obtain subscription information about the terminal or for reporting current location information to the HSS. The HSS sends a location update response message to the MME, and the HSS may carry the updated authorization RFSP information (authorized RFSP index value) in step 5, so as to achieve the purpose of sending the information to the MME.

Optionally, in the location update response message, the HSS may further carry RFSP index information of the subscription of the terminal in the 4G network, which may be different from the first value.

In step 608, the mme sets an RFSP index (RFSP index in use) value used by the terminal in the 4G network according to the received grant RFSP information (authorized RFSP index value).

In a simple implementation, the MME sets RFSP index (RFSP index in use) used in the 4G network to the received authorized RFSP index value.

For example, authorized RFSP index value =250, and its corresponding frequency point priority information indicates that 4g 800mhz is high priority. And MME settings RFSP index in use value = authorized RFSP index value =250. According to this setting, the MME subsequently sends RFSP index in use value =250 to the ENB, which sets the corresponding 4g 800mhz to high priority.

In the above-mentioned procedure 602-608, when the 5G PCF decides to change the RFSP information corresponding to the terminal so that the terminal accesses the 4G network from the currently resident 5G network, the updated RFSP information is synchronized by the HSS to the 4G network MME in time through step 5-9, so that the 4G MME sets the coordinated RFSP information and the ENB sets the coordinated frequency priority information, thereby ensuring that the ENB accommodates the terminal to reside in the 4G frequency cell, and avoiding the ping-pong problem caused by the ENB forcing the terminal to return to 5G due to the terminal signing RFSP information as 5G priority.

In one embodiment B, taking a terminal currently residing in the 4G network as an example, the 5G PCF updates RFSP index (authorized RFSP index), and notifies the 4G MME of the updated RFSP index (authorized RFSP index) via the 4G HSS, so that the 4G network (ENB) starts a terminal access 5G network flow; fig. 7 is a fifth flowchart of a network switching method according to an embodiment of the present application, as shown in fig. 7, where the embodiment may include the following steps:

In step 701, the terminal currently resides in the 4G network, and is triggered by some factors, in order to switch the terminal from the 4G to the 5G network, the PCF/PCRF decides to adjust RFSP information corresponding to the terminal (authorized RFSP index value).

In one scenario, the PCF/PCRF determines, according to the data analysis result (such as the terminal service behavior prediction result, the network performance prediction result, etc.) provided by the NWDAF, that the terminal needs to be triggered to access the 5G network, so as to better carry the service type that the terminal is about to happen by using the 5G network, or better balance the load of the 4G network or the 5G network.

In another scenario, the PCF/PCRF monitors the traffic type triggered by the terminal in the 4G network, e.g. the PCF/PCRF determines from the AF or SGW that the terminal is certain traffic, and the PCF/PCEF triggers the terminal to access the 5G network according to the traffic type, so as to better carry the traffic type that the terminal is about to happen with the 5G network, or better balance the load of the 4G network or the 5G network.

In the above scenario, the PCF/PCRF updates the current RFSP information of the terminal, so that the priority of the first value corresponding to the 5G network frequency point is higher. For example, PCF/PCRF update authorized RFSP index value =rfsp index 1, and this RFSP index 1 can map a 5G network frequency point high priority in the RAN. For example, authorized RFSP index value =255, corresponding to 5g 2.6ghz being the highest priority.

Step 702, after step 701, the PCF notifies the UDM of the updated first RFSP information;

in one implementation, the PCF determines that the authorized RFSP index value is different from the subscribed RFSP index value, and the PCF notifies the UDM of the authorized RFSP index value;

wherein if the UDM and HSS are deployed separately, the UDM will send a notification message further informing the HSS of the authorized RFSP index value.

Wherein, if the UDM and the HSS are co-located, the notification message may be omitted or changed to notification information between the device internal modules.

In step 703, the hss sends a notification message to the MME, carrying the updated first RFSP information.

Specifically, the notification message may be a Insert Subscriber Data message, and the HSS uses the message to modify the updated user profile, where the updated authorization RFSP information (authorized RFSP index value) in step 2 is carried, so as to achieve the purpose of sending the RFSP information to the MME.

In step 704, the mme sets an RFSP index (RFSP index in use) value used by the terminal in the 4G network according to the received updated first RFSP information.

In a simple implementation, the MME sets RFSP index (RFSP index in use) used in the 4G network to the received updated authorized RFSP index value.

For example, authorized RFSP index value =255, and its corresponding bin priority information indicates that 5g2.6ghz is high priority. And MME settings RFSP index in use value = authorized RFSP index value =255.

In step 705, the mme sends RFSP index in use to the ENB.

The MME sends RFSP index in use value =255 to the ENB, which sets the corresponding 5g 2.6ghz to the highest priority. How to transmit reference example 1.

Step 706-707, the terminal performs a cell reselection procedure, and accesses the 5G network.

In one implementation case, according to the frequency point priority mapped by the RFSP index in use value in step 705, and determining that the frequency point priority is changed, the NG RAN sends the updated frequency point priority to the terminal, so that the terminal accesses the 5G network in a redirection mode or a cell reselection mode; wherein, the NG RAN sends the updated frequency point priority to the terminal through RRC connection release message.

In another implementation, the NG RAN determines that the frequency point priority changes according to the frequency point priority mapped out by the RFSP index in use value in step 705, and then the ENB triggers a handover procedure of the terminal, so that the terminal is handed over from the 4G network to the 5G network, and accesses the 5G cell.

In step 708, the pcf or UDM sends the updated authorized RFSP index to the AMF to facilitate AMF setting RFSP index in use.

In step 709, the amf sets RFSP index in use =255 according to the authorized RFSP index value to keep the terminal resident in 5G.

In the above step flow, when the PCF/PCRF decides to change the RFSP information corresponding to the terminal so that the terminal accesses the 5G network from the currently resident 4G network, the updated RFSP information is synchronized by the HSS to the 4G network MME in time through steps 702-703, so that the 4G MME updates the RFSP information and the ENB updates the frequency point priority information, thereby ensuring that the ENB triggers the terminal to access the 5G frequency point cell.

Alternatively, embodiment B may occur after embodiment a; for example, if the terminal was originally from a 5G network, i.e., the terminal may access a 4G network through the embodiment a procedure, the 5G PCF does not delete the terminal's policy context on its own, but continues to maintain the terminal's AM policy association (AM policy association). Subsequently, according to step 701, it is determined that the RFSP information currently corresponding to the terminal needs to be updated (authorized RFSP index value), so as to trigger the terminal to access the 5G network from the 4G network.

Alternatively, real-time instance a and embodiment B may be two time-independent embodiments;

Alternatively, embodiment B may occur separately;

alternatively, embodiment a may occur separately;

in each embodiment of the application, the PCF can decide or change RFSP index information corresponding to the terminal according to the service requirement of the terminal or the actual load condition of the network, and send the RFSP index information to the network where the terminal is currently located for execution. Especially if the terminal is currently in the 4G network, the PCF can send the RFSP index information of the decision to the 4GMME through the HSS, so that the MME can acquire and execute the RFSP policy formulated by the 5G PCF for the terminal, the admission terminal is not ping-pong when residing in the 4G network in some scenes, and the terminal can be returned to access the 5G network even in other scenes.

According to the network switching method provided by the embodiment of the application, the execution main body can be a network switching device. In the embodiment of the present application, a network switching device performs a network switching method as an example, which describes a network switching device provided in the embodiment of the present application.

Fig. 8 is a schematic structural diagram of a network switching device according to an embodiment of the present application, as shown in fig. 8, the network switching device 800 includes: a first update module 810 and a first transmit module 820; wherein:

the first updating module 810 is configured to update RFSP information of a first radio access type/frequency selection priority of a terminal;

The first sending module 820 is configured to forward the updated first RFSP information to a mobility management entity MME of a second network corresponding to the terminal through a home subscriber server HSS of the second network.

Optionally, the apparatus further comprises:

the first determining module is used for determining that the terminal needs to access a second frequency point from the first frequency point.

Optionally, the first updating module 810 is specifically configured to:

and setting the first RFSP information of the terminal to a first value, wherein the first value corresponds to the highest priority of the second frequency point.

Optionally, the first sending module 820 is specifically configured to:

the updated first RFSP information is sent to the MME of the second network corresponding to the terminal through first equipment;

And the equipment is combined equipment of the HSS and a unified data management function network element UDM.

Optionally, the first sending module 820 is specifically configured to:

and forwarding the updated first RFSP information to the HSS of the second network through a unified data management function network element (UDM), so that the HSS sends the updated first RFSP information to the MME of the second network corresponding to the terminal.

Optionally, the first updating module 810 is specifically configured to:

acquiring first information;

updating the first RFSP information of the terminal according to the first information to obtain updated first RFSP information;

wherein the first information includes at least one of:

the service type information initiated by the terminal;

predicting and analyzing results of terminal business behaviors;

predicting and analyzing the network performance;

network load analysis information;

and the service experience analysis information of the terminal.

Optionally, the first updating module 810 is specifically configured to:

the first information is acquired from a network data analysis function network element NWDAF.

Optionally, the first updating module 810 is specifically configured to:

and acquiring the service type information initiated by the terminal from an application server or a session management function network element SMF.

The network switching device in the embodiment of the application can be an electronic device, for example, an electronic device with an operating system, or can be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

Fig. 9 is a second schematic diagram of a network switching device according to an embodiment of the present application, as shown in fig. 9, the network switching device 900 includes: a first acquisition module 910 and a second update module 920; wherein:

the first obtaining module 910 is configured to obtain updated first RFSP information of a terminal from a home subscriber server HSS of the second network, where the updated first RFSP information is updated by a policy control function network element PCF of the first network for the terminal;

the second updating module 920 is configured to update, according to the updated first RFSP information, second RFSP information of the terminal, where the second RFSP information is RFSP information that should be used by the terminal.

Optionally, the apparatus further comprises:

a third sending module, configured to send the second RFSP information to an access network device eNB;

Optionally, the first obtaining module 910 is specifically configured to:

sending a location update request message of the terminal to an HSS;

and receiving a position update response message sent by the HSS, wherein the position update response message comprises the updated first RFSP information.

Optionally, the first obtaining module 910 is specifically configured to:

and receiving a user subscription data update message sent by the HSS, wherein the user subscription data update message comprises the updated first RFSP information.

Fig. 10 is a third schematic diagram of a network switching device according to an embodiment of the present application, and as shown in fig. 10, the network switching device 1000 includes: a first receiving module 1010 and a second transmitting module 1020; wherein:

the first receiving module 1010 is configured to receive updated first RFSP information of a terminal, where the updated first RFSP information is updated by a policy control function network element PCF of a first network for the terminal;

The second sending module 1020 is configured to send the updated first RFSP information to an MME of a second network, where the updated first RFSP information is used to update second RFSP information of the terminal, and the second RFSP information is RFSP information that should be used by the terminal.

Optionally, in the case that the HSS is not configured with the unified data management function network element UDM, the first receiving module 1010 is specifically configured to:

and receiving the updated first RFSP information sent by the PCF through the UDM.

Optionally, in the case that the HSS is integrated with the UDM, the first receiving module 1010 is specifically configured to:

and receiving the updated first RFSP information from the PCF.

Optionally, the second sending module 1020 is specifically configured to:

Receiving a position update request message of the terminal sent by the MME;

and sending a position update response message to the MME, wherein the position update response message comprises the updated first RFSP information.

Optionally, the second sending module 1020 is specifically configured to:

and sending user subscription data information to the MME, wherein the user subscription data information comprises the updated first RFSP information.

The network switching device provided by the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 3 to fig. 7, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

Optionally, fig. 11 is a schematic structural diagram of a communication device provided in the embodiment of the present application, as shown in fig. 11, and further provides a communication device 1100, including a processor 1101 and a memory 1102, where the memory 1102 stores a program or an instruction that can be executed on the processor 1101, for example, when the communication device 1100 is a terminal, the program or the instruction is executed by the processor 1101 to implement each step of the network switching method embodiment, and the same technical effect can be achieved. When the communication device 1100 is a network side device, the program or the instruction, when executed by the processor 1101, implements the steps of the above-described network switching method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a PCF network element, which comprises a processor and a communication interface, wherein the processor is used for: updating the first radio access type/frequency selection priority RFSP information of a terminal, wherein the communication interface is used for forwarding the updated first RFSP information to a Mobility Management Entity (MME) of a second network corresponding to the terminal through a Home Subscriber Server (HSS) of the second network. The PCF network element embodiment corresponds to the PCF method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the PCF network element embodiment, and can achieve the same technical effects.

Specifically, the embodiment of the application also provides a PCF network element. Fig. 12 is a schematic hardware structure of a PCF network element provided in an embodiment of the present application, as shown in fig. 12, the PCF network element 1200 includes: a processor 1201, a network interface 1202, and a memory 1203. The network interface 1202 is, for example, a common public radio interface (common public radio interface, CPRI).

Specifically, PCF network element 1200 of the embodiment of the present application further includes: instructions or programs stored in the memory 1203 and capable of being executed by the processor 1201, the processor 1201 calls the instructions or programs in the memory 1203 to execute the method executed by each module shown in fig. 8, and achieve the same technical effects, so that repetition is avoided and thus a detailed description is omitted.

Wherein the processor 1201 is configured to:

updating first radio access type/frequency selection priority RFSP information of the terminal;

and forwarding the updated first RFSP information to a mobile management entity MME of a second network corresponding to the terminal through a home subscriber server HSS of the second network.

Optionally, the processor 1201 is further configured to:

and determining that the terminal needs to access a second frequency point from the first frequency point.

Optionally, the processor 1201 is specifically configured to:

acquiring first information;

wherein the first information includes at least one of:

the service type information initiated by the terminal;

predicting and analyzing results of terminal business behaviors;

predicting and analyzing the network performance;

network load analysis information;

and the service experience analysis information of the terminal.

Optionally, the processor 1201 is specifically configured to:

The embodiment of the application also provides a Mobility Management Entity (MME), which comprises a processor and a communication interface, wherein the communication interface is used for acquiring updated first RFSP information of a terminal from a Home Subscriber Server (HSS) of the second network, wherein the updated first RFSP information is updated for the terminal by a policy control function network element (PCF) of the first network; the processor is used for: and updating second RFSP information of the terminal according to the updated first RFSP information, wherein the second RFSP information is RFSP information which the terminal should use. The embodiment of the Mobility Management Entity (MME) corresponds to the embodiment of the method of the Mobility Management Entity (MME), and each implementation process and implementation manner of the embodiment of the method can be applied to the embodiment of the Mobility Management Entity (MME) and can achieve the same technical effect.

Specifically, the embodiment of the application also provides a mobility management entity MME. Fig. 13 is a schematic hardware structure of a mobility management entity MME according to an embodiment of the present application, as shown in fig. 13, the mobility management entity 1300 includes: processor 1301, network interface 1302, and memory 1303. The network interface 1302 is, for example, a common public radio interface (common public radio interface, CPRI).

Specifically, the mobility management entity MME1300 according to the embodiment of the present application further includes: instructions or programs stored in the memory 1303 and capable of running on the processor 1301, the processor 1301 calls the instructions or programs in the memory 1303 to execute the method executed by each module shown in fig. 9, and achieve the same technical effects, so repetition is avoided and will not be described herein.

Wherein processor 1301 is configured to:

acquiring updated first RFSP information of a terminal from a Home Subscriber Server (HSS) of the second network, wherein the updated first RFSP information is updated for the terminal by a policy control function network element (PCF) of the first network;

and updating second RFSP information of the terminal according to the updated first RFSP information, wherein the second RFSP information is RFSP information which the terminal should use.

Optionally, the processor 1301 is further configured to:

sending the second RFSP information to an access network device eNB;

Optionally, the processor 1301 is specifically configured to:

sending a location update request message of the terminal to an HSS;

Optionally, the processor 1301 is specifically configured to:

The embodiment of the application also provides a Home Subscriber Server (HSS), which comprises a processor and a communication interface, wherein the communication interface is used for receiving updated first RFSP information of a terminal, and the updated first RFSP information is updated for the terminal by a policy control function network element (PCF) of a first network; and sending the updated first RFSP information to an MME of a second network, wherein the updated first RFSP information is used for updating second RFSP information of the terminal, and the second RFSP information is RFSP information which should be used by the terminal. The home subscriber server HSS embodiment corresponds to the home subscriber server HSS method embodiment, and each implementation process and implementation manner of the method embodiment are applicable to the home subscriber server HSS embodiment, and the same technical effect can be achieved.

Specifically, the embodiment of the application also provides a Home Subscriber Server (HSS). Fig. 14 is a schematic hardware structure diagram of a home subscriber server HSS according to an embodiment of the application, as shown in fig. 14, the home subscriber server 1400 includes: a processor 1401, a network interface 1402 and a memory 1403. The network interface 1402 is, for example, a common public radio interface (common public radio interface, CPRI).

Specifically, the home subscriber server 1400 according to the embodiment of the present application further includes: instructions or programs stored in the memory 1403 and capable of being executed on the processor 1401, the processor 1401 invokes the instructions or programs in the memory 1403 to execute the method executed by each module shown in fig. 10, and achieve the same technical effect, so repetition is avoided and will not be described herein.

Wherein the processor 1401 is configured to:

receiving updated first RFSP information of a terminal, wherein the updated first RFSP information is updated for the terminal by a policy control function network element PCF of a first network;

and sending the updated first RFSP information to an MME of a second network, wherein the updated first RFSP information is used for updating second RFSP information of the terminal, and the second RFSP information is RFSP information which should be used by the terminal.

Optionally, in the case that the HSS is not co-located with the unified data management function network element UDM, the processor 1401 is configured to specifically:

Optionally, in the case that the HSS is collocated with the UDM, the processor 1401 is configured to specifically:

and receiving the updated first RFSP information from the PCF.

Optionally, the processor 1401 is configured to specifically:

receiving a position update request message of the terminal sent by the MME;

Optionally, the processor 1401 is configured to specifically:

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above network switching method embodiment, and can achieve the same technical effects, and in order to avoid repetition, the description is omitted here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions, the processes of the network switching method embodiment can be realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement each process of the above-mentioned network handover method embodiment, and achieve the same technical effects, so that repetition is avoided, and details are not repeated here.

The embodiment of the application also provides a network switching system, which comprises: PCF network element, mobility management entity MME and home subscriber server HSS, the PCF network element may be configured to perform the steps of the network handover method as described above, the mobility management entity MME may be configured to perform the steps of the network handover method as described above, and the home subscriber server HSS may be configured to perform the steps of the network handover method as described above.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A network switching method, comprising:

2. The network switching method according to claim 1, wherein the method further comprises:

3. The network switching method according to claim 2, wherein the policy control function network element PCF of the first network updates the first radio access type/frequency selection priority RFSP information of the terminal, comprising:

4. A network handover method according to any one of claims 1-3, wherein the first RFSP information includes an authorized RFSP index or an in-use RFSP index corresponding to the terminal.

5. The network handover method according to any one of claims 1-4, wherein the PCF forwards the updated first RFSP information to a mobility management entity MME of a second network corresponding to the terminal through a home subscriber server HSS of the second network, comprising:

6. The network handover method according to any one of claims 1-4, wherein the PCF forwards the updated first RFSP information to a mobility management entity MME of a second network corresponding to the terminal through a home subscriber server HSS of the second network, comprising:

7. The network handover method according to any one of claims 1-6, wherein the policy control function network element PCF of the first network updates first radio access type/frequency selection priority RFSP information of the terminal, comprising:

the PCF acquires first information;

wherein the first information includes at least one of:

the service type information initiated by the terminal;

predicting and analyzing results of terminal business behaviors;

predicting and analyzing the network performance;

network load analysis information;

and the service experience analysis information of the terminal.

8. The network handoff method of claim 7 wherein said PCF obtains first information comprising:

9. The network handoff method of claim 7 wherein said PCF obtains first information comprising:

10. The network handover method according to any one of claims 2 to 9, wherein the first frequency point is a frequency point corresponding to a first RAT or a first cell of the second network, and the second frequency point is a frequency point corresponding to a second RAT or a second cell of the second network; or (b)

11. A network switching method, comprising:

12. The network switching method according to claim 11, wherein the method further comprises:

the MME sends the second RFSP information to an access network device eNB;

13. The network switching method according to claim 11 or 12, wherein the updated first RFSP information includes an authorized rfspin or an in-use rfspin corresponding to the terminal.

14. The network handover method according to any of claims 11-13, wherein the mobility management entity MME of the second network obtains updated first RFSP information of a terminal from a home subscriber server HSS of the second network, comprising:

the MME sends a location update request message of the terminal to an HSS;

15. The network handover method according to any of claims 11-13, wherein the mobility management entity MME of the second network obtains updated first RFSP information of a terminal from a home subscriber server HSS of the second network, comprising:

16. The network handover method according to any one of claims 12-15, wherein a first frequency point is a frequency point corresponding to a first RAT or a first cell of the second network, and a second frequency point is a frequency point corresponding to a second RAT or a second cell of the second network; or (b)

17. A network switching method, comprising:

18. The network switching method according to claim 17, wherein the updated first RFSP information includes an authorized rfspin or an in-use rfspin corresponding to the terminal.

19. The network handover method according to claim 17 or 18, wherein, in case the HSS is not collocated with the unified data management function network element UDM, the home subscriber server HSS of the second network receives updated first RFSP information of the terminal, comprising:

20. The network handover method according to claim 17 or 18, wherein, in case the HSS is collocated with the UDM, the home subscriber server HSS of the second network receives updated first RFSP information of the terminal, comprising:

the HSS receives the updated first RFSP information from the PCF.

21. The network handover method according to any one of claims 17-20, wherein the HSS sending the updated first RFSP information to an MME of a second network, comprises:

22. The network handover method according to any one of claims 17-20, wherein the HSS sending the updated first RFSP information to an MME of a second network, comprises:

23. The network handover method according to any one of claims 17-22, wherein a first frequency point is a frequency point corresponding to a first RAT or a first cell of the second network, and a second frequency point is a frequency point corresponding to a second RAT or a second cell of the second network; or (b)

24. A network switching apparatus, comprising:

25. A network switching apparatus, comprising:

a first obtaining module, configured to obtain updated first RFSP information of a terminal from a home subscriber server HSS of a second network, where the updated first RFSP information is updated by a policy control function network element PCF of the first network for the terminal;

26. A network switching apparatus, comprising:

27. PCF network element comprising a processor and a memory storing a program or instructions executable on said processor, which when executed by said processor, implements the steps of the network handover method according to any one of claims 1 to 10.

28. A mobility management entity MME, characterized by comprising a processor and a memory storing a program or instructions executable on said processor, which when executed by said processor, implements the steps of the network handover method according to any of claims 11 to 16.

29. A home subscriber server, HSS, comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the network handover method of any of claims 17 to 23.

30. A readable storage medium, characterized in that the readable storage medium stores thereon a program or instructions, which when executed by a processor, implements the network switching method according to any one of claims 1-10, or implements the network switching method according to any one of claims 11 to 16, or implements the network switching method according to any one of claims 17 to 23.