CN111132238B - Network access method and device - Google Patents

Abstract

Embodiments of the present application provide a network access method and device, which relate to the technical field of communication devices, and solve the problems of long time for a terminal to access a network and high power consumption in the prior art. The method includes: the access function management network element AMF acquires an access policy and a first access request, the first access request includes a terminal identifier, and the first access request is used to request access to the network; the The AMF determines the target wireless access type/radio frequency priority RFSP index according to the identifier of the terminal and the access policy, the AMF stores multiple RFSP indexes, and the target RFSP index is the multiple RFSP indexes In one, an RFSP index uniquely identifies an RFSP; the AMF sends the target RFSP index to the base station, and the target RFSP index is used to instruct the base station to determine the RFSP corresponding to the target RFSP index.

Description

Network access method and device

technical field

The present application relates to the field of communication technologies, and in particular to a network access method and device.

Background technique

At present, when the terminal moves to the coverage of the fifth generation (5rd generation, 5G) shared base station, the terminal needs to try to access different frequencies in the 5G shared base station several times before selecting an appropriate frequency for access, which causes the terminal to not only It takes a long time to access the network, and the power consumption of the terminal is also large.

Contents of the invention

The present application provides a network access method and device, which are used to solve the problems of long time for a terminal to access a network and high power consumption in the prior art.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

In a first aspect, a network access method is provided, wherein an AMF acquires an access policy and a first access request, where the first access request includes an identifier of a terminal, and the first access request is used to request access to a network. Then, the AMF determines the target RFSP index according to the access policy and the identifier of the terminal. The AMF stores multiple RFSP indexes, the target index is one of the multiple RFSP indexes, and one RFSP index uniquely identifies one RFSP. Next, the AMF sends the target RFSP index to the base station, where the target RFSP index is used to instruct the base station to determine the RFSP corresponding to the target RFSP index.

In the above method, after the AMF acquires the access policy and the first access request, the AMF determines the target RFSP index from multiple RFSPs according to the access policy and the terminal identifier in the first access request. Then, the AMF sends the target RFSP index to the base station. After receiving the target RFSP index, the base station may determine the target RFSP according to the target RFSP index and the pre-configured correspondence between the RFSP index and the RFSP. Finally, the base station sends the target RFSP to the terminal, so that the terminal accesses the network according to the target RFSP. Compared with the prior art, when a terminal needs to make multiple attempts to access the frequency band of a 5G shared base station when accessing the network, the terminal can access the network at one time. Therefore, the terminal can reduce the times of accessing the network, so that the terminal can reduce the time for accessing the network and reduce power consumption.

In a second aspect, a network access device is provided, and the network access device can realize the functions in the first aspect and any possible implementation manner thereof. These functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware. Hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible manner of the present application, the network access device includes: a communication unit, configured to obtain an access policy and a first access request, the first access request includes a terminal identifier, and the first access request uses to request access to the network. The processing unit is configured to determine the target RFSP index according to the access policy and the identifier of the terminal. The storage unit is used to store multiple RFSP indexes, the target RFSP index is one of the multiple RFSP indexes, and one RFSP index uniquely identifies one RFSP. The communication unit is further configured to send the target RFSP index to the base station, where the target RFSP index is used to instruct the base station to determine the RFSP corresponding to the target RFSP index.

In a third aspect, a network access device is provided, including a memory and a processor. The memory is used to store instructions executed by the computer, and the processor and the memory are connected through a bus. When the network access device is running, the processor executes the computer-executable instructions stored in the memory, so that the network access device executes the network access method described in the first aspect.

The network access device may be the AMF, or a part of the devices in the AMF, for example, a chip system in the AMF. The chip system is used to support the AMF to implement the functions involved in the first aspect and any possible implementation thereof, for example, receiving, determining, and distributing the data and/or information involved in the above network access method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

A fourth aspect provides a computer-readable storage medium, the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions are run on a computer, the computer is made to execute the network access method described in the first aspect.

In a fifth aspect, a computer program product is provided. When the computer program product runs on a computer, the computer executes the network access method described in the first aspect and any possible design manner thereof.

It should be noted that all or part of the above computer instructions may be stored on the first computer storage medium. Wherein, the first computer storage medium may be packaged together with the processor of the network access device, or may be separately packaged with the processor of the network access device, which is not limited in this embodiment of the present application.

For the description of the second aspect, the third aspect, the fourth aspect and the fifth aspect in this application, you can refer to the detailed description of the first aspect; and, the beneficial effects of the second aspect, the third aspect, the fourth aspect and the fifth aspect , you can refer to the beneficial effect analysis of the first aspect, which will not be repeated here.

In a sixth aspect, a network access method is provided, where a base station receives a target RFSP index from an AMF. Then, the base station determines the target RFSP according to the target RFSP index and the pre-configured corresponding relationship between the RFSP and the RFSP index. Finally, the base station sends the target RFSP to the terminal.

In the prior art, when a terminal accesses a network through a base station, it needs to access the frequency of the base station multiple times until a suitable frequency is determined, which results in a long time for the terminal to access the network and high power consumption. However, in this application, the base station can directly determine the RFSP that the terminal can use according to the target RFSP index, and then send the RFSP to the terminal, so that the terminal can access the network according to the frequency allocated by the base station. The terminal does not need to access the frequency of the base station multiple times, therefore, the terminal can reduce the time for accessing the network and reduce the power consumption of the access network.

In a seventh aspect, a network access device is provided, and the network access device can realize the functions in the sixth aspect and any possible implementation manners thereof. These functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware. Hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible manner of the present application, the network access device includes: a communication unit, configured to receive a target RFSP index from the AMF. The processing unit is configured to determine the target RFSP according to the target RFSP index and the pre-configured corresponding relationship between the RFSP and the RFSP index. The storage unit is used to store the corresponding relationship between the pre-configured RFSP and the RFSP index, the corresponding relationship includes one or more RFSPs and one or more RFSP indexes, one RFSP corresponds to one RFSP index, and the target RFSP is one or more One of the RFSPs. The communication unit is further configured to send the target RFSP to the terminal.

In an eighth aspect, a network access device is provided, including a memory and a processor. The memory is used to store instructions executed by the computer, and the processor and the memory are connected through a bus. When the network access device is running, the processor executes the computer-executable instructions stored in the memory, so that the network access device executes the network access method described in the first aspect.

The network access device may be a base station, or a part of devices in the base station, such as a chip system in the base station. The chip system is used to support the base station to implement the functions involved in the sixth aspect and any possible implementation thereof, for example, receiving, determining, and distributing the data and/or information involved in the above network access method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

A ninth aspect provides a computer-readable storage medium, the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions are run on a computer, the computer is made to execute the network access method described in the sixth aspect.

In a tenth aspect, a computer program product is provided. When the computer program product is run on a computer, the computer is made to execute the network access method according to the sixth aspect and any possible design manner thereof.

It should be noted that all or part of the above computer instructions may be stored on the first computer storage medium. Wherein, the first computer storage medium may be packaged together with the processor of the network access device, or may be separately packaged with the processor of the network access device, which is not limited in this embodiment of the present application.

For the description of the seventh aspect, the eighth aspect, the ninth aspect and the tenth aspect in this application, you can refer to the detailed description of the sixth aspect; and, the beneficial effects of the seventh aspect, the eighth aspect, the ninth aspect and the tenth aspect , you can refer to the beneficial effect analysis of the sixth aspect, which will not be repeated here.

In an eleventh aspect, a network access method is provided. First, a terminal sends a first access request to a base station, the first access request includes an identifier of the terminal, and the first access request is used to request access to a network. Then, the terminal receives the target RFSP from the base station. Finally, the terminal accesses the network according to the target RFSP.

In the above method, after the terminal sends the first access request to the base station, the terminal receives the target RFSP from the base station. In this way, the base station can directly access the network according to the target RFSP. Compared with the prior art, the terminal does not need to try to access the network multiple times. Therefore, the terminal can reduce the times of accessing the network, thereby reducing the time for accessing the network and reducing power consumption.

A twelfth aspect provides a network access device capable of implementing the functions in the eleventh aspect and any possible implementation thereof. These functions may be implemented by hardware, or may be implemented by executing corresponding software through hardware. Hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible manner of the present application, the network access device includes: a communication unit, configured to send a first access request to the base station, the first access request includes a terminal identifier, and the first access request is used to request Connect to the network. The communication unit is also used for receiving the target RFSP from the base station. The processing unit is used for accessing the network according to the target RFSP.

A thirteenth aspect provides a network access device, including a memory and a processor. The memory is used to store instructions executed by the computer, and the processor and the memory are connected through a bus. When the network access device is running, the processor executes the computer-executable instructions stored in the memory, so that the network access device executes the network access method described in the eleventh aspect.

The network access device may be a terminal, or a part of the terminal, such as a chip system in the terminal. The chip system is used to support the terminal to implement the functions involved in the eleventh aspect and any possible implementation thereof, for example, receiving, determining, and distributing the data and/or information involved in the above network access method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

A fourteenth aspect provides a computer-readable storage medium, the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions run on a computer, the computer executes the network access method described in the eleventh aspect.

A fifteenth aspect provides a computer program product. When the computer program product runs on a computer, the computer executes the network access method as described in the eleventh aspect and any possible design thereof. .

It should be noted that all or part of the above computer instructions may be stored on the first computer storage medium. Wherein, the first computer storage medium may be packaged together with the processor of the network access device, or may be separately packaged with the processor of the network access device, which is not limited in this embodiment of the present application.

For the description of the twelfth aspect, the thirteenth aspect, the fourteenth aspect and the fifteenth aspect in this application, you can refer to the detailed description of the sixth aspect; and, the twelfth aspect, the thirteenth aspect, the fourteenth aspect and the For the beneficial effects of the fifteenth aspect, reference may be made to the analysis of the beneficial effects of the sixth aspect, which will not be repeated here.

In the embodiment of the present application, the names of the above-mentioned network access devices do not limit the devices or functional modules themselves. In actual implementation, these devices or functional modules may appear with other names. As long as the functions of each device or functional module are similar to those of the present application, they fall within the scope of the claims of the present application and their equivalent technologies.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another communication system provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of a network access method provided in an embodiment of the present application;

FIG. 4 is a schematic flowchart of another network access method provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a network access device provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another network access device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a chip provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and functions. Personnel can understand that words such as "first" and "second" are not limiting the quantity and execution order.

In order to facilitate the understanding of the technical solution of the present application, some technical terms are introduced below.

1. RFSP

RFSP includes radio access type (radio access type, RAT) and radio frequency priority (frequency selection priority, FSP). In the embodiment of the present application, the RAT and the FSP are referred to as "RFSP" for short.

2. Shared base station

A shared base station refers to a base station that two (or more than two) communication operators jointly use the same network.

Exemplarily, taking the shared base station as an example where two communication operators (communication operator 1 and communication operator 2) jointly use the 5G network 5G shared base station, in the coverage area of the shared base station there are the following overlapping coverage areas or similar adjacent coverage area.

1) The 5G shared base station of communication operator 1 and the 5G shared base station of communication operator 2 are adjacent base stations.

2) There is an adjacent relationship between the 5G shared base station of communication operator 1, the non-shared base station of communication operator 2, and the non-shared base station of communication operator 1.

3) There is an adjacent relationship between the 5G shared base station of communication operator 2, the non-5G shared base station of communication operator 2, and the non-shared base station of communication operator 1.

It should be noted that in the coverage area of the 5G shared base station, there are other network coverages of communication operator 1 (such as 2G, 3G, 4G) and other network coverages of communication operator 2 (such as 2G, 3G, 4G) . The frequency distribution in the coverage area of the 5G shared base station is as follows:

(1) The frequency of the 5G standalone station of communication operator 1 is F1.

(2) The frequency of the 5G standalone station of communication operator 2 is F2.

(3) The frequency of the 5G shared station has the following three situations:

Case 1: The frequencies of the 5G shared base station of communication operator 1 and the 5G shared base station of communication operator 2 are both F1+F2.

Case 2: The frequency of the 5G sharing station of communication operator 1 and the 5G sharing base station of communication operator 2 are both F3+F4.

Case 3: The frequency of the 5G shared base station of communication operator 1 is F1, and the frequency of the 5G shared base station of operator 2 is F2.

Wherein, F1, F2, F3, and F4 are different frequencies respectively. The selection of the above three cases depends on various factors such as the frequency resources of the communication operator.

Based on the above frequency allocation, if there is a frequency of a non-shared base station of a communication operator supported by the terminal in the coverage area of the shared base station, the terminal uses the non-shared base station and frequency. If the frequency of the communication operator supported by the terminal does not exist in the coverage area of the shared base station, the terminal uses the shared base station and shared frequency of other communication operators.

It should be noted that, when a terminal accesses a shared base station or a non-shared base station, the large broadband access type and frequency are preferentially selected. For example, when a terminal moves to area A, there are 3G networks, 4G networks, and 5G networks in area A. If the terminal supports 5G networks, the terminal will preferentially access the 5G network.

Exemplarily, in area B of city A, there is a 5G sharing base station 1 that communication operator 1 builds and shares with communication operator 2. The 5G frequency of 5G sharing base station 1 is F1 or F1+F2. For example, F1 is 3.4-3.5GHZ, F2 (3.5-3.6GHZ).

In this case, if a user of communication operator 1 holds a 5G terminal and moves to area B, the 5G terminal will preferentially access the 5G shared base station, and the frequency used is F1 or F2.

In yet another example, in area C of city A, there is a 5G shared base station 2 that communication operator 2 builds and shares with communication operator 1. The 5G frequency of 5G shared base station 2 is F2 or F1+F2.

In this case, if a user of communication operator 1 holds a 5G terminal and moves to area C, the 5G terminal will preferentially access the 5G shared base station, and the frequency used is F2 or F1.

Wherein, area B and area C have overlapping 4G coverage of communication operator 1 and communication operator 2 . For example, the 4G frequency of communication operator 1 is F3 (1860-1875HZ) or F5 (1920-1940). The 4G frequency of communication operator 2 is F4 (1735-1760) or F6 (1940-955).

If a user of communication operator 1 holds a 5G terminal and leaves the coverage of the 5G shared base station in area B or area C, the 5G terminal accesses 4G frequency F3 or F5. If a user of communication operator 2 holds a 5G terminal and leaves the coverage of the 5G shared base station in area B or area C, the 5G terminal accesses 4G frequency F4 or F6.

The technical solution of the embodiment of the present application can be applied to various communication systems, for example: 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 (OFDMA), Single Carrier Frequency-Division Multiple Access (single carrier FDMA, SC-FDMA) and other systems. The term "system" can be used interchangeably with "network". The CDMA system may implement wireless technologies such as universal terrestrial radio access (UTRA), CDMA2000, and the like. UTRA may include wideband CDMA (wideband CDMA, WCDMA) technology and other CDMA variant technologies. CDMA2000 can cover interim standard (interim standard, IS) 2000 (IS-2000), IS-95 and IS-856 standards. A TDMA system may implement a wireless technology such as global system for mobile communication (GSM). OFDMA system can implement such as evolved universal wireless terrestrial access (evolved UTRA, E-UTRA), ultra mobile broadband (umb), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash Wireless technologies such as OFDMA. UTRA and E-UTRA are UMTS and UMTS evolutions. 3GPP in long term evolution (long term evolution, LTE) and various versions based on LTE evolution are new versions of UMTS using E-UTRA. 5G communication system and New Radio (NR) are the next generation communication system under research. In addition, the communication system may also be applicable to future-oriented communication technologies, all of which are applicable to the technical solutions provided in the embodiments of the present application.

The system architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. For the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems. In the embodiment of the present application, the method provided is applied to an NR system or a 5G network as an example for illustration.

As shown in Figure 1, Figure 1 shows a schematic structural diagram of a communication system provided by an embodiment of the present application. The communication system includes: a terminal 10, a base station 20 communicating with the terminal, an access function management network element 30, and a unified data Management network element 40 , policy control network element 50 , and data network 60 .

The terminal 10 can communicate with the access function management network element 30 through the base station 20 . The terminal 10 can also access the data network 60 through the base station 20 .

The access function management network element 30 communicates with the unified data management network element 40 and the policy control network element 50 respectively. The access function management network element 30 is responsible for mobility management of the communication system, for example, location update of the terminal 10, network registration of the terminal 10, network switching of the terminal 10, and the like.

The unified data management network element 40 is used for managing the subscription information of the communication system and authentication of the terminal 10 .

The main functions of the policy control network element 50 include: (1) application and service data flow detection; (2) quality of service (quality of service, QoS) control; (3) quota management; (4) billing based on flow; 5) Background data (Background data) transmission strategy negotiation; (6) PFD (PacketFilter Descriptor ) for management; (7) data flow distribution management (different DN); (8) UDR (User Data Repository) front-end function to provide terminal subscription information; (9) provide network selection and mobility management related strategies (such as RFSP retrieval); (10) UE policy configuration (the network side must support providing policy information to the UE, for example, network discovery and selection policy, SSC mode selection policy, network slice selection policy).

In the embodiment of the present application, the base station 20 may be called an access device, and may also be called a radio access network (radioaccess network, RAN). The base station is a shared base station. The base station can be a global system for mobile communication (GSM), a base station (base transceiver station, BTS) in code division multiple access (code division multiple access, CDMA), broadband code division multiple access (wideband code division multiple access, Base station (node B) in WCDMA), eNB, eNB in Internet of things (IoT) or narrowband Internet of things (narrow band-internet of things, NB-IoT), future 5G mobile communication network or future evolution A base station in a public land mobile network (public land mobile network, PLMN), which is not limited in this embodiment of the present application.

In the embodiment of the present application, the terminal 10 is a device that needs to access a network. The terminal may be known by different names such as user equipment (UE), access terminal, terminal unit, terminal station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, vehicle user equipment, terminal agent or terminal device, etc. Optionally, the terminal may be various handheld devices, vehicle-mounted devices, wearable devices, and computers with communication functions, which are not limited in this embodiment of the present application. For example, a handheld device may be a smartphone. The vehicle-mounted device may be a vehicle-mounted navigation system. A wearable device may be a smart bracelet. The computer may be a personal digital assistant (PDA) computer, a tablet computer, and a laptop computer.

As shown in FIG. 2 , FIG. 2 shows a schematic structural diagram of a communication system provided by an embodiment of the present application.

When the terminal moves to the coverage area of the shared base station, the terminal needs to access an external data network (data network, DN) through the shared base station. The shared base station is the shared base station of communication operator 1 and communication operator 2 .

It should be understood that in FIG. 2, the core network (Core Network, CN) is taken as an example of the 5G core network (5GCore, 5GC). At this time, the base station can be an access device in the 5G network or can be an access network (access network). , AN)/radio access network (radio access network, RAN). For example, The Next Generation Node B (gNB).

In the 5G communication system shown in Figure 2, each function can establish a connection through the next generation network (NG) interface to realize communication, for example, the terminal can communicate with the access and mobility network through the N interface 1 (N1 for short). The management function (access and mobility management function, AMF) network element establishes a control plane signaling connection, and the AN/RAN can establish a control plane signaling connection with the AMF through the N interface 2 (N2 for short), and the user plane function (User plane function, UPF ) network element can establish a control plane signaling connection with a session management function (Session Management Function, SMF) network element through an N interface 4 (N4 for short). In FIG. 2 , the v-security edge protection proxy (v-security edge protection proxy, vSEPP) in the core network of communication operator 1 is connected to hSEPP in the core network of communication operator 2 through N interface 32 (N32 for short).

It should be understood that in 5GC, the network element or entity corresponding to the access function management network element may be an AMF network element, and the network element or entity corresponding to the unified data management network element may be a unified data management (unified data management, UDM) network element The network element or entity corresponding to the policy control network element may be a policy control function (policy control function, PCF) network element.

It should be understood that if the core network adopts a 4G core network (for example, evolved packet core (EPC), the base station can be an access device or an evolved base station (evolved NodeB, eNB) in the 4G network. Access function management The network element or entity corresponding to the network element can be a mobility management entity (mobility management entity, MME). The unified data management network element can be a user home server (home subscriber server, HSS) or a user subscription database (user subscription database, USD) Or a database entity. The policy control network element may be a policy and charging rules function (PCRF) network element.

It should be noted that the base station, AMF network element, SMF network element, UDM network element, user plane function (User plane function, UPF) network element, authentication server function (authentication server function, AUSF) network element, network storage Function (NF repository function, NRF) network element, network exposure function (network exposure function, NEF) network element and policy control function (policy control function, PCF) network element, etc. are just a name, and the name does not constitute a limitation on the device itself. In 5G network and other future networks, base station, AMF network element, SMF network element, UDM network element, UPF network element, AUSF network element, NRF network element, NEF network element, application function (application function, AF) and PCF The network element or entity corresponding to the network element may also have another name, which is not specifically limited in this embodiment of the present application.

With reference to FIG. 1 and FIG. 2 , FIG. 3 shows a network access method provided by an embodiment of the present application.

As shown in Figure 3, the network access method includes:

Step 101, AMF acquires a first access request.

Wherein, the first access request includes the identifier of the terminal, and the identifier of the terminal may encrypt an Encrypted Mobile Subscriber Identification (EMSI) code, a personal identification number (personal identification number, PIN), and the like. The first access request is used to request access to the network.

It should be noted that the first access request may also include location information of the terminal, capability information of the terminal, and subscription information of the terminal.

Among them, the capability information of the terminal refers to the network that the terminal can support. For example, if the terminal is a 5G terminal, when the terminal moves to the coverage of the 5G shared base station, the terminal can access the 5G network; if the terminal is a 4G terminal In this case, when the terminal moves to the coverage of the 5G shared base station, the terminal cannot access the 5G network and can only access the 4G network.

The contract information of the terminal refers to the service information possessed by the terminal, that is, the information signed by the user corresponding to the terminal and the communication operator. Exemplarily, when the terminal has a voice service, if the 5G shared base station supports the voice service, the terminal can use the voice service through the 5G shared base station; if the 5G shared base station does not support the voice service, the terminal can use the voice service through the 4G network .

In step 102, the AMF obtains an access policy.

Wherein, the access policy is used to determine the RFSP used when the terminal accesses the network.

Step 103, the AMF determines the target RFSP index according to the access policy and the identifier of the terminal.

Among them, AMF stores multiple RFSP indexes. The target RFSP is one of multiple RFSP indexes, and one RFSP index uniquely identifies one RFSP.

It should be noted that the RFSP index includes a radio access type index (Index to RAT) and a radio frequency priority index (Index to FSP).

Exemplarily, Index to RAT can be 1, 2, 3. Among them, 1 means 5G, 2 means 4G, and 3 means 3G.

Exemplarily, it is taken that the 5G shared base station is a base station shared by communication operator 1 and communication operator 2 as an example. For communication operator 1, the Index to FSP stored by AMF can be in the following order: a, b, c, d, e, f. Among them, a represents F1, b represents F2, c represents F3, d represents F4, e represents F5, and f represents F6. For communication operator 2, AMF stores Index to FSP in the following order: b, a, d, f, c, e. That is, if the terminal of communication operator 1 needs to access the 5G shared base station, F1 is used first, and when F1 is occupied, F2 is used, and so on. If the terminal of communication operator 2 needs to access the 5G shared base station, F2 is used first, and when F2 is occupied, F1 is used, and so on.

Step 104, the AMF sends the target RFSP index to the base station.

Wherein, the target RFSP index is used to instruct the base station to determine the RFSP corresponding to the target RFSP index.

It should be understood that in the embodiment of the present application, the AMF transmits the Index to RAT and the Index to FSP to the base station through the N2 interface. Then, the base station maps Index to RAT to RAT and Index to FSP to FSP according to the stored correspondence between RFSP and RFSP index. In this way, the technical solutions of the embodiments of the present application can save channel resources.

In the network access method provided by the embodiment of this application, after the AMF obtains the access policy and the first access request, the AMF determines the target RFSP index from multiple RFSPs according to the access policy and the terminal identifier in the first access request . Then, the AMF sends the target RFSP index to the base station. After receiving the target RFSP index, the base station may determine the target RFSP according to the target RFSP index and the pre-configured correspondence between the RFSP index and the RFSP. Finally, the base station sends the target RFSP to the terminal, so that the terminal accesses the network according to the target RFSP. Compared with the prior art, when a terminal needs to make multiple attempts to access the frequency band of a 5G shared base station when accessing the network, the terminal can access the network at one time. Therefore, the terminal can reduce the times of accessing the network, so that the terminal can reduce the time for accessing the network and reduce power consumption.

In a possible embodiment, in combination with the technical solution shown in FIG. 3 , FIG. 4 shows another network access method provided in this embodiment of the present application.

As shown in Figure 4, before step 101, step 201-step 202 may also be included:

Step 201, the terminal sends a first access request to the base station. Correspondingly, the base station receives the first access request from the terminal.

It should be noted that when the terminal moves to the coverage area of the shared base station, or when the terminal needs to access the network through the shared base station, the terminal may send a first access request to the base station.

Step 202, the base station sends a first access request to the AMF. In response, the AMF receives the first access request from the base station.

In a possible implementation manner, the base station may directly forward the first access request from the terminal to the base station.

In another possible implementation manner, the base station may generate the second access request according to the first access request and the identifier of the base station. Then, the base station sends a second access request to the AMF.

In a possible embodiment, the access policy includes a first access policy or a second access policy, and the priority of the second access policy is higher than that of the first access policy. As shown in FIG. 4 , when the terminal accesses the network through the 5G shared base station for the first time, step 102 can be implemented through step 203 or step 204 .

Step 203, when the access policy includes the first access policy, the AMF acquires the first access policy from the UDM.

Wherein, the first access strategy includes any one of the following access strategies:

Strategy 1. Select an RFSP for the terminal according to the capability information of the terminal.

Exemplarily, the terminal supports IP-based voice transmission (Voice over IP), but the base station accessed by the terminal does not support the voice service, then the AMF selects the 4G wireless access type (E-UTRAN) and frequency for the terminal.

Strategy 2. Select RFSP according to the PLMN supported by the terminal.

That is to say, the AMF selects different frequencies according to the communication operator to which the terminal belongs.

Exemplarily, for the 5G shared base station that communication operator A mainly builds and shares with communication operator B, and the AMF corresponding to the 5G shared base station, when the terminal uses the PLMN of communication operator 1 to access, F1 is preferred. When the terminal uses the PLMN of communication operator 2 to access, F2 is preferred.

Strategy 3. Select the RFSP according to the capability information of the terminal and the supported PLMN.

Exemplarily, for example, if the terminal supports Voice over IP, but the 5G shared base station does not support voice, the AMF selects different 4G access frequencies according to the PLMN of the terminal, and selects frequency F3 or F5 for terminals on this network, and for roaming terminals on other networks or The terminal of the other network sharing network selects frequency F4 or F6.

In a possible implementation manner, the AMF sends a first request message to the UDM, where the first request message is used to request a first access policy, and the first request message includes capability information of the terminal and a PLMN supported by the terminal. The UDM receives the first request message from the AMF. The UDM determines the first access strategy according to the first request message, and then the UDM sends the first access strategy to the AMF. The AMF receives the first access policy from the UDM.

In another possible implementation manner, the AMF sends a second request message to the UDM, where the second request message is used to verify the legitimacy of the terminal and the base station. The second request message includes the identifier of the terminal and the identifier of the base station. When the UDM determines that the terminal is a valid terminal and the base station is a valid base station, the UDM sends a second response message to the AMF. Wherein, the second response message may include the first access policy, and may also include subscription information of the terminal.

Exemplarily, the UDM may determine that the terminal is a valid terminal and the base station is a valid base station in the following manner.

The first identifier and the second identifier are stored in the UDM. Wherein, the first identifier uniquely identifies a terminal, and the second identifier uniquely identifies a base station. In the case that the identifier of the terminal in the second request message is the same as the first identifier, UDM determines that the terminal is a legal terminal; as a legitimate base station.

Step 204, when the access policy includes the second access policy, the AMF acquires the second access policy from the PCF.

Wherein, the second access strategy includes any one of the following access strategies:

Strategy 4. Select RFSP according to the terminal type.

Exemplarily, when terminals belong to different terminal groups of different enterprises, different RFSPs may be configured. For example, a communication operator may assign different RFSPs to electric power companies. For high-priority services (such as industrial robot services), the allocated RFSP is: 5G+F11. For other terminals (such as employees' handheld 5G mobile phones), the allocated RFSP is 5G+F1/F2.

Strategy 5. Select RFSP according to the location of the terminal.

Exemplarily, the PCF configures different RFSPs according to the location of the terminal. For example, for the power distribution control robot of a power company, F11 can only be connected in a specific area. When the power distribution control robot is located in other locations, the assigned RFSP is 5G+F1\F2 or 4G+F3/F4/F5/F6, etc.

Strategy 6. Select RFSP according to the service delay and bandwidth requirements of the terminal.

Wherein, the PCF can configure a slice selection policy, that is, authorized network slice selection assistance information (network slice selection assistance information, NSSAI).

Exemplarily, the PCF is configured with 5G slice 1 and 5G slice 2 for the terminal. The 5G slice 1 is used to support low-latency and high-reliability terminal services (for example, services of a power distribution control robot of a power company). 5G slice 2 is used to support services of terminals with large bandwidth (for example, 5G mobile phones held by employees of power companies). Then the PCF can configure the authorized NSSAI=the slice logo of the industrial robot (that is, the logo of 5G slice 1) for the power distribution control robot, and configure the authorized NSSAI=the slice of the office private network for the 5G mobile phone held by the employees of the electric power company. Slice flag (ie, the identity of 5G slice 2).

In a possible implementation manner, the AMF sends a third request message to the PCF, where the third request message is used to request the second access policy, and the third request message includes terminal location information, terminal type, and terminal service information. The PCF receives the third request message from the AMF. The PCF determines the second access policy according to the third request message, and then the PCF sends the second access policy to the AMF. Correspondingly, the AMF receives the second access policy from the PCF.

In the embodiment of the present application, when the PCF does not have the second access policy, the AMF may determine the target access policy according to the first access policy and the identifier of the terminal. In the case that the PCF has the second access policy, the AMF may first obtain the first access policy from the UDM, and then obtain the second access policy from the PCF. That is, the AMF firstly executes step 203 and then executes step 204 . Then, the AMF takes the second access policy as the access policy. Or, when the AMF determines that the terminal is a valid terminal and the base station is a valid base station through interaction with the UDM, the AMF directly obtains the second access policy from the PCF.

It should be noted that, in the case where the 5G shared base station does not have a shared core network, that is, the 5G core network includes UDMs and PCFs of multiple communication operators. Exemplarily, the 5G core network has UDM1, UDM2, PCF1, and PCF2. UDM1 and PCF1 belong to network elements in the core network of communication operator 1 . UDM2 and PCF2 belong to network elements in the core network of communication operator 2 .

The AMF can determine the communication operator corresponding to the terminal according to the identifier of the terminal. Then, the AMF obtains the access policy from the UDM and/or PCF of the core network of the communication operator corresponding to the terminal.

Exemplarily, the 5G shared base station is the 5G shared base station of communication operator 1 and communication operator 2. The 5G core network includes UDM1 and PCF1 of communication operator 1, and UDM2 and PCF2 of communication operator 2. When the terminal of communication operator 1 moves to the coverage of the 5G shared base station, the terminal sends an access request to the 5G shared base station. After obtaining the access request of the terminal, the 5G shared base station sends the first access request to the AMF. After receiving the first access request, the AMF determines the identity of the terminal according to the first access request. The AMF can determine the communication operator to which the terminal belongs according to the identifier of the terminal. If the terminal belongs to communication operator 1, the AMF obtains the access policy from UDM1 and PCF1; if the terminal belongs to communication operator 2, the AMF obtains the access policy from UDM2 and PCF2.

Certainly, communication operator 1 and communication operator 2 may also share the UDM and/or PCF of the core network. In the case that the communication operator 1 and the communication operator 2 share the UDM and/or PCF of the core network, the process for the AMF to obtain the access policy can refer to the descriptions in steps 204 and 205, which will not be repeated here.

It should be noted that, in the case that the terminal has already accessed the network through the base station, that is, the AMF has already stored the access policy corresponding to the terminal. When the AMF receives the access request from the base station again, the AMF can directly determine the access policy corresponding to the terminal according to the identifier of the terminal.

In a possible embodiment, as shown in FIG. 4, the network access method provided in the embodiment of the present application may further include the following steps:

Step 205, the base station receives the target RFSP index from the AMF.

Step 206, the base station determines the target RFSP according to the target RFSP index and the preset correspondence between RFSP and RFSP index.

Wherein, the base station presets the corresponding relationship between the RFSP and the RFSP index. The corresponding relationship includes one or more RFSPs, and one or more RFSP indexes. One RFSP corresponds to one RFSP index.

Exemplarily, Table 1 shows a correspondence between RFSP and RFSP index.

Table 1

RFSP index RAT FSP 1+a 5G F1 1+b 5G F2 2+d 4G F3 2+e 4G F4 3+h 3G F7 3+i 3G F8

According to Table 1, when the base station receives the RFSP index from the AMF as 1+a, it can determine that the RAT corresponding to the RFSP index is 5G, and the corresponding FSP is F1. For other corresponding relationships, reference may be made to the description of the RFSP index, which will not be repeated here. In Table 1, only some RFSP indexes and corresponding RATs and FSPs are listed for example. In actual use, the RFSP index in the corresponding relationship and the corresponding RAT and FSP can be configured for the AMF according to actual needs.

Step 207, the base station sends the target RFSP to the terminal. Correspondingly, the terminal receives the target RFSP from the base station.

Step 208, the terminal accesses the network according to the target RFSP.

It should be understood that after the terminal receives the target RFSP from the base station, the terminal can access the network according to the target RFSP. Compared with the prior art, the terminal does not need to try to access the network multiple times. Therefore, the terminal can reduce the times of accessing the network, thereby reducing the time for accessing the network and reducing power consumption.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of methods. In order to realize the above functions, it includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the example units and algorithm steps described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the network access device into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. Optionally, the division of modules in this embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.

A network access device 500 provided in the embodiment of the present application is applied to the AMF, and may also be a chip applied to the AMF. Alternatively, the network access device 500 is applied to a base station, and may also be a chip applied to a base station. Alternatively, the network access device is applied to a terminal, and may also be a chip applied to a terminal. As shown in FIG. 5 , the network access device 500 includes: a communication unit 501 , a processing unit 502 and a storage unit 503 .

When the network access device is applied to the AMF, or is a chip applied to the AMF, the communication unit 501 is configured to acquire an access policy and a first access request.

Wherein, the first access request includes the identifier of the terminal, and the first access request is used to request access to the network.

For example, referring to FIG. 3 , the communication unit 501 may be used to perform step 101 and step 102 .

The processing unit 502 is configured to determine the target RFSP according to the access policy and the identifier of the terminal.

For example, with reference to FIG. 3 , the processing unit 502 may be configured to execute step 103 .

The storage unit 503 is configured to store multiple RFSP indexes.

Wherein, the target RFSP index is one of multiple RFSP indexes, and one RFSP index uniquely identifies one RFSP.

The communication unit 501 is further configured to send the target RFSP index to the base station.

Wherein, the target RFSP index is used to instruct the base station to determine the RFSP corresponding to the target RFSP index.

For example, referring to FIG. 3 , the communication unit 501 may be used to perform step 104 .

Optionally, the access policy includes a first access policy or a second access policy, and the priority of the second access policy is higher than that of the first access policy. The communication unit 501 is specifically configured to: if the access policy includes the first access policy, obtain the first access policy from the UDM; if the access policy includes the second access policy, obtain the second access policy from the PCF access policy.

Optionally, the first access strategy includes any one of the following strategies: select an RFSP for the terminal according to the capability information of the terminal; select an RFSP according to the PLMN supported by the terminal; select an RFSP according to the capability information of the terminal and the PLMN supported by the terminal. RFSP.

Optionally, the second access strategy includes any one of the following strategies: select RFSP according to the type of the terminal; select RFSP according to the location information of the terminal; select RFSP according to the service requirements of the terminal on delay and bandwidth.

Optionally, the communication unit 501 is specifically configured to communicate with a base station to obtain the first access request.

When the network access device in FIG. 5 is applied to a base station, or is a chip applied to a base station, the communication unit 501 is configured to receive the target RFSP index from the AMF.

For example, referring to FIG. 4 , the communication unit 501 is configured to perform step 205 .

The processing unit 502 is configured to determine the target RFSP according to the target RFSP index and the pre-configured corresponding relationship between the RFSP and the RFSP index.

For example, referring to FIG. 4 , the processing unit 502 is configured to execute step 206 .

The storage unit 503 is configured to store a preset correspondence between RFSPs and RFSP indexes.

A communication unit 501, configured to send a target RFSP to a terminal.

For example, referring to FIG. 4 , the communication unit 501 is configured to perform step 207 .

When the network access apparatus 500 is applied to a terminal, or is a chip applied to a terminal, the communication unit 501 is configured to send a second access request to a base station.

Wherein, the second access request includes the identifier of the terminal, and the second access request is used to request access to the network.

For example, referring to FIG. 4 , the communication unit 501 is configured to perform step 201 .

The communication unit 501 is further configured to receive the target RFSP from the base station.

For example, referring to FIG. 4 , the communication unit 501 is configured to perform step 207 .

The processing unit 502 is configured to connect to the network according to the target RFSP.

Fig. 6 shows another possible structural diagram of the network access device involved in the foregoing embodiments. The device includes: one or more processors 161 and a communication interface 162 . The processor 161 is used to control and manage the actions of the device, for example, to execute the steps executed by the above-mentioned processing unit 502, and/or to execute other processes of the technologies described herein.

In a specific implementation, as an embodiment, the processor 161 may include one or more CPUs, for example, CPU0 and CPU1 in FIG. 6 .

In a specific implementation, as an embodiment, the communications device may include multiple processors, for example, the processor 161 in FIG. 6 . Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

Optionally, the device may further include a memory 163 and a communication line 164, and the memory 163 is used to store program codes and data of the device.

FIG. 7 is a schematic structural diagram of a chip 170 provided by an embodiment of the present application. The chip 170 includes one or more than two (including two) processors 1710 and a communication interface 1730 .

Optionally, the chip 170 further includes a memory 1740 , which may include a read-only memory and a random access memory, and provides operation instructions and data to the processor 1710 . A part of the memory 1740 may also include a non-volatile random access memory (non-volatile random access memory, NVRAM).

In some implementations, the memory 1740 stores the following elements, execution modules or data structures, or their subsets, or their extended sets.

In the embodiment of the present application, the corresponding operation is executed by calling the operation instruction stored in the memory 1740 (the operation instruction may be stored in the operating system).

Wherein, the above-mentioned processor 1710 may realize or execute various exemplary logical blocks, units and circuits described in conjunction with the disclosure of the present application. The processor may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute the various illustrative logical blocks, units and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

Memory 1740 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk or solid state disk; combination.

The bus 1720 may be an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus or the like. The bus 1720 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one line is used in FIG. 7 , but it does not mean that there is only one bus or one type of bus.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional units is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs Completed by different functional units, that is, the internal structure of the device is divided into different functional units to complete all or part of the functions described above. For the specific working process of the above-described system, device, and unit, reference may be made to the corresponding process in the foregoing method embodiments, and details are not repeated here.

The embodiment of the present application also provides a computer-readable storage medium, where an instruction is stored in the computer-readable storage medium, and when the computer executes the instruction, the computer executes each step in the method flow shown in the above-mentioned method embodiment.

Wherein, the computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connection having one or more wires, portable computer disk, hard disk. Random access memory (Random Access Memory, RAM), read-only memory (Read-Only Memory, ROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM), registers, hard disk, optical fiber, portable compact Disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium in a suitable combination of the above, or values in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be a component of the processor. The processor and the storage medium may be located in an Application Specific Integrated Circuit (ASIC). In the embodiments of the present application, a computer-readable storage medium may be any tangible medium containing or storing a program, and the program may be used by or in combination with an instruction execution system, device or device.

An embodiment of the present application provides a computer program product containing instructions, and when the instructions are run on a computer, the computer is made to execute the network access method as described in FIG. 3 and FIG. 4 .

Since the network access device, computer-readable storage medium, and computer program product in the embodiments of the present application can be applied to the above methods, the technical effects that can be obtained can also refer to the above method embodiments. The embodiments of the present application are described in This will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (14)

1. A network access method, characterized in that, comprising: The access function management network element AMF acquires an access policy and a first access request, where the first access request includes the identifier of the terminal, and the first access request is used to request access to the network; The AMF determines a target radio access type/radio frequency priority RFSP index according to the terminal identifier and the access policy, the AMF stores a plurality of RFSP indices, and the target RFSP index is the plurality of RFSP indices One of the RFSP indexes, an RFSP index uniquely identifies an RFSP; The AMF sends the target RFSP index to the base station, where the target RFSP index is used to instruct the base station to determine the RFSP corresponding to the target RFSP index; The access policy includes a first access policy or a second access policy, the priority of the second access policy is higher than that of the first access policy, and the AMF obtains the access policy, including: When the access policy includes a first access policy, the AMF obtains the first access policy from a unified data management network element UDM; If the access policy includes a second access policy, the AMF acquires the second access policy from a policy control function network element PCF. 2. The network access method according to claim 1, wherein the first access strategy includes any one of the following strategies: selecting an RFSP for the terminal according to the capability information of the terminal; Select RFSP according to the public land mobile telephone network PLMN supported by the terminal; Select the RFSP according to the capability information of the terminal and the supported PLMN. 3. The network access method according to claim 1, wherein the second access strategy comprises any one of the following strategies: According to the type of terminal, select RFSP; Select RFSP according to the location of the terminal; Select RFSP according to the service delay and bandwidth requirements of the terminal. 4. The network access method according to any one of claims 1-3, wherein the AMF obtaining the first access request includes: The AMF acquires the first access request through the base station. 5. A network access method, characterized in that, The base station receives the target RFSP index from the AMF, and the AMF is used to obtain the first access strategy from the UDM when the access strategy includes the first access strategy; the AMF is also used to obtain the first access strategy in the access strategy If the policy includes a second access policy, acquiring the second access policy from the PCF; the priority of the second access policy is higher than that of the first access policy; The base station determines the target RFSP according to the target RFSP index and the pre-configured correspondence between the RFSP and the RFSP index; the correspondence includes one or more RFSPs and one or more RFSP indexes, and one RFSP corresponds to one RFSP an index, the target RFSP being one of the one or more RFSP indexes; The base station sends the target RFSP to the terminal. 6. The network access method according to claim 5, wherein before the base station receives the target RFSP index from the AMF, the method further comprises: The base station receives a first access request from the terminal, where the first access request includes an identifier of the terminal; the first access request is used to request access to a network; The base station sends the first access request to the AMF. 7. A network access device, characterized in that it comprises: A communication unit, configured to acquire an access policy and a first access request, where the first access request includes the identifier of the terminal, and where the first access request is used to request access to the network; a processing unit, configured to determine a target RFSP index according to the identifier of the terminal and the access policy; A storage unit for storing a plurality of RFSP indexes, the target RFSP index is one of the plurality of RFSP indexes, and an RFSP index uniquely identifies an RFSP; The communication unit is further configured to send the target RFSP index to the base station, where the target RFSP index is used to instruct the base station to determine the RFSP corresponding to the target RFSP index; The access policy includes a first access policy or a second access policy, and the priority of the second access policy is higher than that of the first access policy; The communication unit is specifically used for: If the access policy includes the first access policy, obtain the first access policy from a unified data management network element UDM; If the access policy includes a second access policy, the second access policy is acquired from a policy control function network element PCF. 8. The network access device according to claim 7, wherein the first access strategy includes any one of the following strategies: selecting an RFSP for the terminal according to the capability information of the terminal; Select RFSP according to the public land mobile telephone network PLMN supported by the terminal; Select the RFSP according to the capability information of the terminal and the supported PLMN. 9. The network access device according to claim 7, wherein the second access strategy includes any one of the following strategies: According to the type of terminal, select RFSP; Select RFSP according to the location of the terminal; Select RFSP according to the service delay and bandwidth requirements of the terminal. 10. The network access device according to any one of claims 7-9, wherein the communication unit is specifically configured to obtain the first access request through a base station. 11. A network access device, comprising: A communication unit, configured to receive a target RFSP index from an AMF, where the AMF is configured to acquire the first access strategy from the UDM if the access strategy includes the first access strategy; the AMF is also configured to If the access policy includes a second access policy, obtain the second access policy from the PCF; the priority of the second access policy is higher than that of the first access policy; A processing unit, configured to determine the target RFSP according to the target RFSP index and the pre-configured correspondence between RFSP and RFSP index; A storage unit, configured to store the correspondence between the preconfigured RFSP and the RFSP index, the correspondence includes one or more RFSPs and one or more RFSP indexes, one RFSP corresponds to one RFSP index, and the target RFSP being one of said one or more RFSPs; The communication unit is configured to send the target RFSP to the terminal. 12. The network access device according to claim 11, characterized in that: The communication unit is further configured to receive a first access request from the terminal, where the first access request is used to request access to a network; The communication unit is further configured to send the first access request to the AMF. 13. A network access device, characterized by comprising a memory and a processor; the memory is used to store computer-executable instructions, and the processor is connected to the memory through a bus; When the network access device is running, the processor executes the computer-executable instructions stored in the memory, so that the network access device executes any one of claims 1-4, or executes the claim The network access method described in 5 or 6. 14. A computer-readable storage medium, characterized in that, the computer-readable storage medium comprises computer-executable instructions, and when the computer-executable instructions are run on a computer, the computer is made to execute any of claims 1-4. one item, or execute the network access method as claimed in claim 5 or 6.

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