CN116939803A

CN116939803A - AMF redirection enhancement method, device, equipment and storage medium

Info

Publication number: CN116939803A
Application number: CN202210329730.0A
Authority: CN
Inventors: 周广永; 蒋蒙菊
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Liaoning Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Liaoning Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-10-24

Abstract

The application discloses an AMF redirection enhancement method, an AMF redirection enhancement device, AMF redirection enhancement equipment and a storage medium, and belongs to the technical field of communication. The method comprises the following steps: receiving a registration request message sent by a user terminal through a base station, wherein the registration request message comprises first slicing information and a first tracking area code, the first slicing information comprises slicing information requested by the user terminal, and the first tracking area code is the current tracking area code of the user terminal; judging whether the first slice information and the first tracking area code meet target service conditions or not, wherein the target service conditions are used for judging that the initial AMF unit can provide service for the user terminal; and triggering NSSF inquiry and redirecting the user terminal to one AMF unit in a target AMF unit pool for registration under the condition that the first slice information and the first tracking area code do not meet the target service condition, wherein the target AMF unit pool is an AMF unit pool matched with the first slice information and the first tracking area code. According to the embodiment of the application, the equilibrium of the number of registered users of the AMF unit pool can be ensured.

Description

AMF redirection enhancement method, device, equipment and storage medium

Technical Field

The present application belongs to the field of communications technologies, and in particular, to an AMF redirection enhancement method, apparatus, device, and storage medium.

Background

In the process of registering a User Equipment (UE) in a fifth Generation mobile communication technology (5 th-Generation, 5G) system, an access and mobility management function (Access and Mobility Management Function, AMF) unit, in which the 5G system first receives a registration request message of the UE, is called an Initial AMF (i.e., initial AMF) unit. The initial AMF unit may determine whether the AMF unit itself is an AMF unit capable of providing a service to the ue, and in the case where the initial AMF unit determines that the AMF unit itself is capable of providing a service to the ue, the initial AMF unit is used as an AMF unit capable of providing a service to the ue without triggering a network slice selection function (Network Slice Selection Function, NSSF) query, and the AMF unit capable of providing a service to the ue may be referred to as a Serving AMF unit (i.e., a Serving AMF unit).

However, if the initial AMF unit determines whether to trigger NSSF query, omission occurs, and if some initial AMFs cannot provide service for the user terminal, the initial AMF unit also determines that the initial AMF unit can serve as a service AMF unit, so that mixed selection of the service AMF units is caused, and the problem of unbalanced number of registered users in an AMF unit pool is caused.

Disclosure of Invention

The embodiment of the application provides an AMF redirection enhancement method, an AMF redirection enhancement device, AMF redirection enhancement equipment and a storage medium, which can ensure that the number of registered users of an AMF unit pool is balanced.

In a first aspect, an embodiment of the present application provides an AMF redirection enhancement method, including: the method comprises the steps that an initial AMF unit receives a registration request message sent by a user terminal through a base station, wherein the registration request message comprises first slice information and a first tracking area code, the first slice information comprises slice information requested by the user terminal, and the first tracking area code is the current tracking area code of the user terminal; the initial AMF unit judges whether the first slice information and the first tracking area code meet target service conditions or not, and the target service conditions are used for judging that the initial AMF unit can provide services for the user terminal; under the condition that the first slice information and the first tracking area code do not meet the target service condition, the initial AMF unit triggers a network slice selection function NSSF to inquire, the user terminal is redirected to one AMF unit in a target AMF unit pool for registration, and the target AMF unit pool is an AMF unit pool matched with the first slice information and the first tracking area code.

In a second aspect, an embodiment of the present application provides an AMF redirection enhancement unit, including: the receiving module is used for receiving a registration request message sent by the user terminal through the base station, wherein the registration request message comprises first slice information and a first tracking area code, the first slice information comprises slice information requested by the user terminal, and the first tracking area code is the current tracking area code of the user terminal; the judging module is used for judging whether the first slice information and the first tracking area code meet target service conditions or not, and the target service conditions are used for judging that the initial AMF unit can provide service for the user terminal; and the processing module is used for triggering a network slice selection function NSSF to inquire and redirecting the user terminal to one AMF unit in the target AMF unit pool for registration under the condition that the first slice information and the first tracking area code do not meet the target service condition, wherein the target AMF unit pool is an AMF unit pool matched with the first slice information and the first tracking area code.

In a third aspect, an embodiment of the present application provides an AMF redirection enhancement device, which is characterized in that the device includes: a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements the AMF redirection enhancement method of the first aspect.

In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, on which computer program instructions are stored, which when executed by a processor implement the AMF redirection enhancement method of the first aspect.

The embodiment of the application provides an AMF redirection enhancement method, an AMF redirection enhancement device, AMF redirection enhancement equipment and a storage medium, wherein a registration request message initiated by a user terminal can comprise slice information of the user terminal and a current tracking area code of the user terminal, and an initial AMF unit can judge whether the initial AMF unit can provide services for the user terminal according to the slice information of the user terminal and the tracking area code. The initial AMF unit judges whether the initial AMF unit can serve as a service AMF unit or not and the factors referred by NSSF inquiry are consistent, so that the initial AMF unit can accurately judge whether the initial AMF unit can serve as a server AMF unit or not, the situation that the initial AMF unit can not provide service for a user terminal under a certain tracking area code and misjudges that the initial AMF unit is the service AMF unit is avoided, NSSF inquiry can be accurately triggered, and therefore mixed selection of the service AMF units is avoided, and the equilibrium of the registered user number of an AMF unit pool is ensured.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings that are needed to be used in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

FIG. 1 is a schematic architecture diagram of an exemplary AMF redirection enhancement system provided in an embodiment of the present application;

FIG. 2 is a flow chart of an embodiment of an AMF redirection enhancement method provided by the present application;

FIG. 3 is a flow chart of another embodiment of an AMF redirection enhancement method provided by the present application;

FIG. 4 is a flow chart of an embodiment of an AMF redirection enhancement apparatus in accordance with the present application;

fig. 5 is a schematic structural diagram of an embodiment of an AMF redirection enhancement device according to the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the particular embodiments described herein are meant to be illustrative of the application only and not limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application.

In the process of registering a user terminal in the 5G system, an AMF unit in which the 5G system first receives a registration request message of the user terminal is referred to as an initial AMF unit. During registration, the initial AMF unit may trigger a network slice selection function (Network Slice Selection Function, NSSF) query to determine AMF units capable of serving the user terminal, and the AMF units capable of serving the user terminal determined by the NSSF query may be referred to as Target AMFs (i.e., target AMF units). Wherein the initial AMF unit may determine from the slice information whether itself is capable of servicing the slice characterized by the slice information. If the initial AMF unit determines that it is capable of serving the slice characterized by the slice information, the user terminal may be registered with the initial AMF unit, i.e. the initial AMF unit is taken as a serving AMF unit. However, in the actual operation process, when a base station is connected to a plurality of AMF unit POOLs (i.e., AMF POOL) in the 5G system, the initial AMF unit can only determine whether to trigger NSSF query according to slice information, and under the condition that some initial AMFs can not provide services for the user terminal, the initial AMF unit also determines that the initial AMF unit can serve as a service AMF unit, so that the service AMF unit is mixed, and the user terminal cannot be accurately registered in each AMF unit POOL in a balanced manner, which causes the problem of unbalanced number of registered AMF unit POOLs.

For example, the tracking area code of the vendor A1 and the tracking area code of the vendor A2 exist under the same base station of the centralized or cloud radio access network (Centralized Radio Access Network or Cloud Radio Access Network, C-RAN), and the core network also has an AMF unit pool of the vendor A1 and an AMF resource pool of the vendor A2. In this case, the base station needs to interface with the respective AMF unit pools of vendor A1 and vendor A2. When the user terminals corresponding to the tracking area codes of the manufacturer A1 and the manufacturer A2 register, the problem of unbalanced users of the AMF resource pools caused by mixed selection of AMF units in the two AMF unit pools occurs.

The application provides an AMF redirection enhancement method, a device, equipment and a storage medium, which can provide a current tracking area code of a user terminal on the basis of providing slice information of the user terminal requesting registration, and an initial AMF unit can judge whether the initial AMF unit can provide services for the user terminal according to the slice information of the user terminal and the tracking area code (Tracking Area Code, TAC) so as to ensure that whether the initial AMF unit can be used as a factor adopted by the service AMF unit is consistent with a factor adopted by NSSF inquiry, thereby the initial AMF unit can accurately judge whether the initial AMF unit can be used as a server AMF unit or not, and can also accurately judge whether NSSF inquiry is triggered, so that mixed selection of the service AMF unit is avoided, and the equilibrium of the registered user number of an AMF unit pool is ensured.

For ease of understanding, at least part of the architecture of the system to which the present application relates is described below. Fig. 1 is a schematic architecture diagram of an example of an AMF redirection enhancement system according to an embodiment of the present application. As shown in fig. 1, the AMF redirection enhancement system may include a user terminal 11, an active antenna processing unit (Active Antenna Unit, AAU) 12, a baseband processing unit (Building Baseband Unit, BBU) 13, a core network 14, and an NSSF unit 15. Each AAU 12 has a corresponding tracking area code, and the tracking area codes corresponding to different AAUs 12 may be the same or different, which is not limited herein. AAU 12 and BBU 13 belong to the base station. The core network 14 may include one or more AMF unit pools, each of which may include more than one AMF unit. For example, fig. 1 has two core networks 14, the left core network 14 may be a ToC core network and the right core network 14 may be a ToB core network. The ToC core network comprises two AMF units, AMF 1 and AMF2, respectively. The ToB core network includes two AMF cell pools, AMF cell pool 141 and AMF cell pool 142, respectively. The AMF unit pool 141 includes two AMF units, AMF 3 and AMF 4, respectively. AMF unit pool 142 includes two AMF units, AMF 5 and AMF 6, respectively. Any of the AMF units described above may be an initial AMF unit.

The AMF redirection enhancement method, the device, the equipment and the storage medium in the application are sequentially described below.

The application provides an AMF redirection enhancement method, which can be applied to an initial AMF unit, namely the AMF redirection enhancement method can be executed by the initial AMF unit. Fig. 2 is a flowchart of an embodiment of an AMF redirection enhancement method according to the present application. As shown in fig. 2, the AMF redirection enhancement method may include steps S201 to S203.

In step S201, a registration request message transmitted from a user terminal via a base station is received.

The registration request message Registration Request is used to request registration of the user terminal. The registration request message may include first slice information and a first tracking area code. The first slice information includes slice information requested by the user terminal. The slice information may identify a network slice. For example, the slice information may include network slice selection function information (Network Slice Selection Assistance Information, nsai), which may identify slices in the 5G network. The first tracking area code is the current tracking area code of the user terminal.

In step S202, it is determined whether the first slice information and the first tracking area code satisfy the target service condition.

The target service condition is used to determine that the initial AMF unit is capable of providing service to the user terminal. The target server condition is related to the slice information and tracking area code. By judging whether the first slice information and the first tracking area code meet the target service condition, the two aspects of slice information and the tracking area code can be combined to judge whether the initial AMF unit can provide service for the user terminal, namely, whether the initial AMF unit can serve as the service AMF unit. If the initial AMF unit is available as a serving AMF unit, then there is no need to trigger an NSSF query. If the initial AMF unit cannot serve as the serving AMF unit, an NSSF query needs to be triggered. The NSSF query is performed by the NSSF unit. If the first slice information and the first tracking area code satisfy the target service condition, the initial AMF unit may be used as a service AMF unit. If the first slice information and the first tracking area code do not satisfy the target service condition, the initial AMF unit cannot be used as a service AMF unit.

In step S203, in the case that the first slice information and the first tracking area code do not meet the target service condition, an NSSF query is triggered, and the user terminal is redirected to one AMF unit in the target AMF unit pool for registration.

The first slice information and the first tracking area code do not satisfy the target service condition, which indicates that the initial AMF cannot be used as a service AMF unit, and the NSSF query needs to be triggered, and the NSSF unit determines the service AMF unit. Factors referenced by the NSSF query include slice information and tracking area code. The NSSF unit may determine AMF units in the AMF unit pool that match the user terminal based on the first slice information and the first tracking area code. The target AMF unit pool is an AMF unit pool matched with the first slice information and the first tracking area code, namely, the AMF units in the target AMF unit pool can support at least part of slice information in the first slice information, and the AMF units in the target AMF unit pool support the first tracking area code. AMF units in the target AMF unit pool can provide services for slices corresponding to the user terminals and tracking area codes.

In the embodiment of the application, the registration request message initiated by the user terminal can comprise the slice information of the user terminal and the current tracking area code of the user terminal, and the initial AMF unit can judge whether the initial AMF unit can provide service for the user terminal according to the slice information of the user terminal and the tracking area code. The initial AMF unit judges whether the initial AMF unit can serve as a service AMF unit or not and the factors referred by NSSF inquiry are consistent, so that the initial AMF unit can accurately judge whether the initial AMF unit can serve as a server AMF unit or not, the situation that the initial AMF unit can not provide service for a user terminal under a certain tracking area code and misjudges that the initial AMF unit is the service AMF unit is avoided, NSSF inquiry can be accurately triggered, and therefore mixed selection of the service AMF units is avoided, and the equilibrium of the registered user number of an AMF unit pool is ensured.

Fig. 3 is a flowchart of another embodiment of an AMF redirection enhancement method according to the present application. Fig. 3 is different from fig. 2 in that the AMF redirection enhancement method shown in fig. 3 may further include step S204.

In step S204, the user terminal is registered to the initial AMF unit in case the first slice information and the first tracking area code satisfy the target service condition.

The first slice information and the first tracking area code satisfy a target service condition, which indicates that the initial AMF can provide service for the user terminal and can be used as a service AMF unit. The user terminal may be registered with the initial AMF unit.

In some embodiments, the initial AMF unit is configured with second slice information and a second tracking area code. The second slice information includes slice information supported by the initial AMF unit, i.e., the second slice information may characterize a slice that the initial AMF unit may provide service. The second tracking area code includes tracking area codes supported by the initial AMF unit. I.e. the second tracking area code may characterize the tracking area code of the tracking area that the initial AMF unit may serve.

The target service condition may include: the second slice information includes at least a portion of the slice information in the intersection of slice information and the second tracking area code includes the first tracking area code.

The slice information intersection is an intersection of the first slice information and third slice information, and the third slice information comprises subscription slice information of the user terminal acquired by the initial AMF unit. The third slice information can be obtained by

The subscription slice information of the user terminal may include a subscription nsai, i.e., subscaled nsai, of the user terminal. The slice information intersection may characterize an intersection of a slice requested by the user terminal and a slice subscribed to by the user terminal. The slice characterized by the intersection of slice information is a slice supported by the user terminal.

The second slice information comprises at least part of the information in the slice information exchange, indicating that the slice supported by the initial AMF unit comprises at least part of the slice supported by the user terminal, i.e. the initial AMF unit may serve the slice of the user terminal. The second tracking area code includes a first tracking area code, and the tracking area indicating that the initial AMF unit can provide service includes a tracking area where the user terminal is currently located, that is, the initial AMF unit can provide service for the current tracking area of the user terminal.

The first slice information and the first tracking area code are considered to satisfy the target service condition only if the second slice information includes at least part of the slice information in the slice information intersection and the second tracking area code includes the first tracking area code. The NSSF query is triggered if the second slice information does not include any slice information in the slice information intersection or the second tracking area code does not include the first tracking area code.

In the above embodiment, the first tracking area code in the registration request message may be acquired by the base station from the message of the N2 interface. The messages for the N2 interface may include an initial user terminal message, initial UE Message, and/or an uplink non-access stratum transport message, uplink NAS Transport, without limitation. In the definition of the messages of the N2 interfaces such as the initial user terminal message, the uplink non-access layer transmission message and the like, the current tracking area code of the user terminal is an essential option, so that the initial AMF can be ensured to acquire the current tracking area code of the user terminal in the registration process, and the reliability of the AMF redirection enhancement method in the embodiment of the application is ensured. In addition, the AMF redirection enhancement method in the embodiment of the application does not need to change other parts in the existing flow of the user terminal registration, can utilize the information in the information of the existing flow to judge whether the target service condition is met, and does not need to greatly change the network architecture, the flow, the signaling information and the like.

In the above embodiments, the tracking area codes supported by the initial AMF unit may be preconfigured. The tracking area codes supported by the initial AMF unit can also be configured when the network system is updated, so that the initial AMF unit can adjust the supported tracking area codes in real time. The initial AMF unit may be any one AMF unit, so configuring tracking area codes supported by the initial AMF unit may also be understood as configuring tracking area codes supported by itself for each AMF unit.

For ease of understanding, the AMF redirection enhancement method in the above embodiment is illustrated below in the system architecture shown in FIG. 1.

The user terminal 11 initiates a registration request to the AAU 12 and BBU 13. The base station may select AMF 5 in the AMF unit pool 142 as an initial AMF unit in the ToB core network according to the ToB network slice information in the registration request and a preset weight factor. AMF 5 judges that AMF 5 can provide service for the slice represented by the slice information intersection according to the first slice information in the registration request message, but AMF 5 judges that AMF 5 can not provide service for the tracking area represented by the first tracking area code according to the first tracking area code in the registration request message. AMF 5 triggers NSSF unit 15 to perform NSSF query, NSSF unit 15 determines that the target AMF unit is AMF 3, AMF 3 can provide service for the slice represented by the intersection of slice information, and can also provide service for the tracking area represented by the first tracking area code. The user terminal 11 is registered with the AMF 3.

The AMF redirection enhancement method in the embodiment of the application can be applied to not only a 5G network system, but also other network systems after the 5G network system, and is not limited in this regard.

In some embodiments, the AMF redirection enhancement method in the embodiments of the present application may be applied to a plurality of vertical industry applications, and correspondingly, the AMF unit pool may have a correspondence with the vertical industry. For example, one AMF cell pool corresponds to one vertical industry, and one vertical industry may correspond to one or more AMF cell pools. The AMF unit pool may be established by an operator or by a vertical industry, but is not limited thereto. Under the condition that the network is provided with a plurality of AMF unit pools, under the conditions of no new wireless base station and no new transmission, the user terminals in the same vertical industry can be located in the same tracking area, namely the current tracking area codes of the user terminals in the same vertical industry are the same, so that the user terminals in the same vertical industry are registered in the AMF unit pools corresponding to the vertical industry, the situation of functional errors caused by registering the user terminals in the AMF unit pools corresponding to the wrong vertical industry is avoided, and the user terminals can be ensured to perform correct special services. Through the correspondence of the AMF unit pool and the vertical industry, the execution of different service standards and different characteristic businesses of the user terminals in different vertical industries can be realized, and the personalized customization demands of users in the vertical industry are met.

In some embodiments, the AMF redirection enhancement method in the embodiments of the present application may be applied to scenarios of AMF unit testing. The target AMF unit pool can be used for AMF functional testing, i.e., AMF testing is performed by using AMF units in the target AMF unit pool. In the case that a new function of the AMF unit needs to be verified or a software version of the AMF unit needs to be upgraded, a test needs to be performed in advance, and after the test passes, the new function is popularized to all AMF units or the software of all AMF units is upgraded to a new version. The target AMF unit pool can be used for AMF test, and the user terminal under the tracking area represented by the tracking area code corresponding to the target AMF unit pool is registered to the AMF units in the target AMF unit pool, so that the specified migration of the international mobile subscriber identity (International Mobile Subscriber Identity, IMSI) is not required for the individual user terminal.

In some embodiments, the AMF redirection enhancement method in the embodiments of the present application may be applied to a scenario with AAUs of different vendors under a centralized BBU. The AMF unit pool has a corresponding relation with the AAU. By establishing the corresponding relation between the AMF unit pool and the AAU and the corresponding relation between the AAU and the tracking area code, the AAU of a designated manufacturer is connected to the AMF unit pool of the designated manufacturer in a butt joint mode, or the special AAU of a user of the designated industry is connected to a separate 5G ToC core network of the user of the industry in a butt joint mode, so that daily maintenance and fault handling are facilitated, and the equipment adaptation problem among different manufacturers is solved.

In addition, the AMF redirection enhancement method in the embodiment of the application does not influence the registration flow triggered by the registration request message without carrying the new slice. Under the condition that the registration request message of the user terminal does not carry any slice information, the base station routes the registration request message to a default AMF unit, wherein the default AMF unit is the initial AMF unit of the user terminal. The initial AMF unit performs authentication, after the authentication is passed, the initial AMF unit downloads subscription slice information, and the initial AMF unit determines that a slice represented by a slice information intersection of the user terminal or a default slice service for subscription is unavailable, and then performs NSSF query, where query parameters of the NSSF query may include a user permanent identifier (Subscription Permanent Identifier, SUPI), single network slice selection information (Single Network Slice Selection Assistance Information, S-nsai), a tracking area code, and the like. The NSSF unit selects a target AMF unit based on the slice S-NSSAI and the tracking area code. And the initial AMF unit sends a registration request message of the user terminal to the target AMF unit according to the information returned by the NSSF unit to continue the registration flow. User terminals in the tracking area characterized by the tracking area codes can be appointed to be registered to a certain AMF unit pool according to the S-NSSAI and the tracking area codes, and the situation of being registered to other AMF unit pools can not occur.

The application also provides an AMF redirection enhancement device. Fig. 4 is a flowchart of an embodiment of an AMF redirection enhancement unit according to the present application. As shown in fig. 4, the AMF redirection enhancement unit 300 may include a receiving module 301, a judging module 302, and a processing module 303.

The receiving module 301 may be configured to receive a registration request message sent by a user terminal via a base station.

The registration request message includes first slice information and a first tracking area code. The first slice information includes slice information requested by the user terminal. The first tracking area code is the current tracking area code of the user terminal.

The determining module 302 may be configured to determine whether the first slice information and the first tracking area code satisfy the target service condition.

The target service condition is used to determine that the initial AMF unit is capable of providing service to the user terminal.

The processing module 303 may be configured to trigger the NSSF query to redirect the ue to one AMF unit in the target AMF unit pool for registration if the first slice information and the first tracking area code do not meet the target service condition.

The target AMF unit pool is an AMF unit pool matched with the first slice information and the first tracking area code.

In some embodiments, the processing module 303 may be further configured to register the user terminal with the initial AMF unit if the first slice information and the first tracking area code satisfy the target service condition.

In some embodiments, the initial AMF unit is configured with second slice information and a second tracking area code. The second slice information includes slice information supported by the initial AMF unit. The second tracking area code includes tracking area codes supported by the initial AMF unit. The target service conditions include: the second slice information includes at least a portion of the slice information in the intersection of slice information and the second tracking area code includes the first tracking area code. The slice information intersection is the intersection of the first slice information and the third slice information. The third slice information includes subscription slice information of the user terminal acquired by the initial AMF unit.

In the above embodiment, the first tracking area code is obtained by the base station from the message of the N2 interface. The message of the N2 interface includes an initial user terminal message and/or an uplink non-access stratum transmission message.

In some embodiments, the processing module 303 may also be used to configure tracking area codes supported by the initial AMF unit.

In some embodiments, the AMF cell pools have correspondence to the vertical industry.

In some embodiments, a target AMF unit pool is used for AMF testing.

In some embodiments, the AMF unit cell has a correspondence with the active antenna processing unit AAU.

The application also provides AMF redirection enhancement equipment. Fig. 5 is a schematic structural diagram of an embodiment of an AMF redirection enhancement device according to the present application. As shown in fig. 5, the AMF redirect enhancement device 400 includes a memory 401, a processor 402, and a computer program stored on the memory 401 and executable on the processor 402.

In one example, the processor 402 may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits that implement embodiments of the present application.

Memory 401 may include Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), magnetic disk storage media devices, optical storage media devices, flash Memory devices, electrical, optical, or other physical/tangible Memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors) it is operable to perform the operations described with reference to the AMF redirection enhancement method in accordance with embodiments of the application.

The processor 402 runs a computer program corresponding to the executable program code by reading the executable program code stored in the memory 401 for implementing the AMF redirection enhancement method in the above embodiment.

In some examples, AMF redirection enhancement device 400 may also include a communication interface 403 and a bus 404. As shown in fig. 5, the memory 401, the processor 402, and the communication interface 403 are connected to each other by a bus 404 and perform communication with each other.

The communication interface 403 is mainly used to implement communication between each module, device, unit and/or apparatus in the embodiment of the present application. Input devices and/or output devices may also be accessed through communication interface 403.

Bus 404 includes hardware, software, or both, coupling the components of AMF redirection enhancement device 400 to one another. By way of example, and not limitation, bus 404 may include an accelerated graphics port (Accelerated Graphics Port, AGP) or other graphics Bus, an enhanced industry standard architecture (Enhanced Industry Standard Architecture, EISA) Bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an industry standard architecture (Industry Standard Architecture, ISA) Bus, an Infiniband interconnect, a Low Pin Count (LPC) Bus, a memory Bus, a micro channel architecture (Micro Channel Architecture, MCa) Bus, a peripheral component interconnect (Peripheral Component Interconnect, PCI) Bus, a PCI-Express (PCI-E) Bus, a serial advanced technology attachment (Serial Advanced Technology Attachment, SATA) Bus, a video electronics standards association local (Video Electronics Standards Association Local Bus, VLB) Bus, or other suitable Bus, or a combination of two or more of these. Bus 404 may include one or more buses, where appropriate. Although embodiments of the application have been described and illustrated with respect to a particular bus, the application contemplates any suitable bus or interconnect.

The present application also provides a computer readable storage medium, on which computer program instructions are stored, which when executed by a processor, can implement the AMF redirection enhancement method in the above embodiment, and achieve the same technical effects, and in order to avoid repetition, no further description is given here. The computer readable storage medium may include a non-transitory computer readable storage medium, such as Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, and the like, but is not limited thereto.

The present application also provides a computer program product, when the instructions in the computer program product are executed by the processor of the electronic device, the electronic device is caused to execute the AMF redirection enhancement method in the above embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no description is repeated here. The electronic device may be implemented as the AMF unit AMF redirection enhancement means or AMF redirection enhancement device in the above embodiments, which is not limited herein.

It should be understood that, in the present specification, each embodiment is described in an incremental manner, and the same or similar parts between the embodiments are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. For an apparatus embodiment, a device embodiment, a computer readable storage medium embodiment, a computer program product embodiment, the relevant points may be found in the description of method embodiments. The application is not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art will appreciate that various alterations, modifications, and additions may be made, or the order of steps may be altered, after appreciating the spirit of the present application. Also, a detailed description of known method techniques is omitted here for the sake of brevity.

Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to being, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware which performs the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Those skilled in the art will appreciate that the above-described embodiments are exemplary and not limiting. The different technical features presented in the different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in view of the drawings, the description, and the claims. In the claims, the term "comprising" does not exclude other means or steps; the word "a" does not exclude a plurality; the terms "first," "second," and the like, are used for designating a name and not for indicating any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The functions of the various elements presented in the claims may be implemented by means of a single hardware or software module. The presence of certain features in different dependent claims does not imply that these features cannot be combined to advantage.

Claims

1. An access and mobility management function AMF redirection enhancement method, comprising:

the initial AMF unit receives a registration request message sent by a user terminal through a base station, wherein the registration request message comprises first slice information and a first tracking area code, the first slice information comprises slice information requested by the user terminal, and the first tracking area code is the current tracking area code of the user terminal;

the initial AMF unit judges whether the first slice information and the first tracking area code meet target service conditions or not, wherein the target service conditions are used for judging that the initial AMF unit can provide service for the user terminal;

and under the condition that the first slice information and the first tracking area code do not meet the target service condition, the initial AMF unit triggers a network slice selection function NSSF to inquire, the user terminal is redirected to one AMF unit in a target AMF unit pool for registration, and the target AMF unit pool is an AMF unit pool matched with the first slice information and the first tracking area code.

2. The method of claim 1, wherein the initial AMF unit is configured with second slice information and second tracking area code, the second slice information comprising slice information supported by the initial AMF unit, the second tracking area code comprising tracking area code supported by the initial AMF unit;

the target service condition includes: the second slice information includes at least a portion of slice information in a slice information intersection, and the second tracking area code includes the first tracking area code,

the slice information intersection is an intersection of the first slice information and third slice information, and the third slice information includes subscription slice information of the user terminal acquired by the initial AMF unit.

3. The method of claim 1, wherein the first tracking area code is obtained by the base station from an N2 interface message,

the message of the N2 interface comprises an initial user terminal message and/or an uplink non-access layer transmission message.

4. The method as recited in claim 1, further comprising:

the initial AMF unit registers the user terminal to the initial AMF unit in case the first slice information and the first tracking area code satisfy the target service condition.

5. The method of claim 1, further comprising, prior to the initial AMF unit receiving a registration request message sent by a user terminal via a base station:

and configuring tracking area codes supported by the initial AMF unit.

6. The method of claim 1, wherein the step of determining the position of the substrate comprises,

the AMF unit pool has a corresponding relation with the vertical industry;

and/or the number of the groups of groups,

the target AMF unit pool is used for AMF testing;

and/or the number of the groups of groups,

the AMF unit pool has a corresponding relation with the active antenna processing unit AAU.

7. An access and mobility management function AMF redirection enhancement unit comprising:

the receiving module is used for receiving a registration request message sent by a user terminal through a base station, wherein the registration request message comprises first slice information and a first tracking area code, the first slice information comprises slice information requested by the user terminal, and the first tracking area code is the current tracking area code of the user terminal;

the judging module is used for judging whether the first slice information and the first tracking area code meet target service conditions or not, wherein the target service conditions are used for judging that the initial AMF unit can provide service for the user terminal;

and the processing module is used for triggering a network slice selection function NSSF to inquire and redirecting the user terminal to one AMF unit in a target AMF unit pool for registration under the condition that the first slice information and the first tracking area code do not meet the target service condition, wherein the target AMF unit pool is an AMF unit pool matched with the first slice information and the first tracking area code.

8. The apparatus of claim 7, wherein the initial AMF unit is configured with second slice information and a second tracking area code, the second slice information comprising slice information supported by the initial AMF unit, the second tracking area code comprising tracking area code supported by the initial AMF unit;

9. An access and mobility management function, AMF, redirection enhancement device comprising: a processor and a memory storing computer program instructions;

the AMF redirection enhancement method of any one of claims 1-6, when said computer program instructions are executed by said processor.

10. A computer readable storage medium, having stored thereon computer program instructions, which when executed by a processor, implement the AMF redirection enhancement method of any one of claims 1 to 6.