CN109219111A

CN109219111A - It is sliced selection method and device

Info

Publication number: CN109219111A
Application number: CN201710530394.5A
Authority: CN
Inventors: 朱方园; 余芳; 李岩; 倪慧
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-06-29
Filing date: 2017-06-29
Publication date: 2019-01-15
Anticipated expiration: 2037-06-29
Also published as: CN109219111B; WO2019001204A1

Abstract

This application involves wireless communication technology fields, provide a kind of slice selection method, it include: the login request message that the first access and mobile management function to ps domain entity receive the NSSAI including request from terminal device, the NSSAI of request includes at least the first S-NSSAI and the first S-NSSAI is the S-NSSAI that the first access is not supported with mobile management function to ps domain entity；The attribute information for obtaining the first S-NSSAI provides the corresponding business of the first S-NSSAI using the corresponding slice of the 2nd S-NSSAI according to the attribute information for terminal device；Acquisition includes the associated NSSP applied between the 2nd S-NSSAI；Registration received message is sent to terminal device, which includes the NSSAI and NSSP that terminal device allows, and the NSSAI of permission includes the 2nd S-NSSAI.The scheme provided through this embodiment, the not supported corresponding business of the first S-NSSAI will not be abandoned, but by the corresponding slice of the 2nd S-NSSAI on behalf of offer.The corresponding business of the NSSAI of premises equipment requests can meet as a result, improve the business experience of user.

Description

It is sliced selection method and device

Technical field

This application involves wireless communication technology field more particularly to a kind of slice selection method and devices.

Background technique

5th generation (the 5^thGeneration, 5G) communication era will have number in terms of hundred billion internet of things equipment access nets Network, demand of the different type application scenarios to network is differentiation.Network microtomy passes through in consolidated network infrastructure The mode of upper virtual separate logical network, mutually isolated network environment is provided for different application scenarios, so that different application Scene can be according to respective demand customized network function and characteristic, to ensure the demand of different business.

Terminal device may access one or more network slice.When network deploys network slice, terminal device is needed When being linked into some slice, terminal device can provide the network slice selection auxiliary information (network of request to network Slice selection assistance information, NSSAI), it is that terminal device selection suitably connects for network Enter with mobile management function to ps domain (access and mobility management function, AMF) entity, to be connected to Suitable network slice.NSSAI is single network slice selection auxiliary information (Single Network Slice Selection Assistance information, S-NSSAI) set.

In the prior art, if in current public land mobile network (public land mobile network, PLMN) AMF entity can only support the part S-NSSAI of premises equipment requests, terminal device to need to provide auxiliary information, which to be indicated The slice type that S-NSSAI counterpart terminal equipment preferably accesses.Core net is mentioned according to the auxiliary information to be selected as terminal device For the AMF entity of service.For example, as shown in Figure 1, if the first AMF entity A MF-1 supports S-NSSAI 1, the 2,3, the 2nd AMF Entity A MF-2 support S-NSSAI 3,4, terminal device (UE) request NSSAI in type be S-NSSAI 2,3,4 and eventually That end equipment preferably accesses is S-NSSAI 4, then network can choose the 2nd AMF entity A MF-2 conduct and be initially terminal device The AMF entity of service is provided.

However, will lead to the corresponding business of S-NSSAI (for example, S-NSSAI 2) abandoned in this way can not all make subsequent With influencing the business experience of terminal device.

Summary of the invention

This application describes a kind of slice selection method and devices.

On the one hand, embodiments herein provides a kind of slice selection method, this method comprises: the first access and movement Property management function entity (for example, the first AMF entity) from terminal device receive login request message, login request message include eventually The corresponding NSSAI of slice of end equipment request access.The corresponding NSSAI of slice of request access includes at least the first S-NSSAI, Wherein, the first S-NSSAI is the first access and the S-NSSAI that mobile management function to ps domain entity is not supported.First access and movement Property management function entity obtain the first S-NSSAI attribute information cut according to attribute information using the 2nd S-NSSAI is corresponding Piece provides the corresponding business of the first S-NSSAI for terminal device.First access and mobile management function to ps domain entity obtain NSSP, NSSP includes the association applied between the 2nd S-NSSAI.First access and mobile management function to ps domain entity are sent out to terminal device Registration received message is sent, registration received message includes the slice corresponding NSSAI and NSSP that terminal device allows to access, and allows to connect The corresponding NSSAI of the slice entered includes the 2nd S-NSSAI.

According to above-mentioned slice selection scheme, the first AMF entity obtains attribute information, when the first AMF entity does not support first When S-NSSAI, the first S-NSSAI is provided for terminal device using the corresponding slice of the 2nd S-NSSAI according to attribute information and is corresponded to Business.In this way, the not supported corresponding business of the first S-NSSAI will not be abandoned, but it is corresponding by the 2nd S-NSSAI Slice is on behalf of offer.In addition, the NSSP rule and second into NSSP that the first access and mobile management function to ps domain entity obtain S-NSSAI association.Therefore, after terminal device receives NSSP rule, can perceive the corresponding business of the first S-NSSAI is by second The corresponding slice of S-NSSAI is on behalf of offer.The corresponding business of the NSSAI of premises equipment requests can meet as a result, improve The business experience of user.

In a kind of possible design, the attribute information for obtaining the first S-NSSAI can be accomplished in that first connects Enter with mobile management function to ps domain entity from user data management equipment (for example, UDM equipment) or policy control functions equipment (example Such as, PCF equipment) obtain the first S-NSSAI attribute information.For example, the first access and mobile management function to ps domain entity are from user Data management apparatus or policy control functions equipment obtain slice signing policy information, and the is obtained from slice signing policy information The attribute information of one S-NSSAI.

In a kind of possible design, the first access and mobile management function can be accomplished in that by obtaining NSSP Energy entity sends above-mentioned instruction information to policy control functions equipment, and the update of request strategy control function equipment is related to the first S- The NSSP of NSSAI.First access and mobile management function to ps domain entity receive NSSP from policy control functions equipment.

In a kind of possible design, this method further include: the first access and mobile management function to ps domain entity are set in terminal Addition instruction information in standby context, instruction information are used to indicate the first access and mobile management function to ps domain entity and use second The corresponding slice of S-NSSAI provides the corresponding business of the first S-NSSAI for terminal device.Therefore, by the transmitting of context, He accesses and mobile management function to ps domain entity would know that above-mentioned instruction information, to judge that the access and mobile management function to ps domain are real Whether body is suitable for terminal device service, to improve the business experience of user.

In a kind of possible design, this method further include: the first access and mobile management function to ps domain entity connect from second Enter and receive request message with mobile management function to ps domain entity (for example, the 2nd AMF entity), with the context of requesting terminal equipment； First access and mobile management function to ps domain entity to second access and mobile management function to ps domain entity send terminal device up and down Text, context include above-mentioned instruction information.Therefore, according to the scheme of the application, after terminal device is mobile, the 2nd AMF entity To the context of the first AMF entity requests terminal device before movement, to know that the 2nd AMF entity is not most suitable AMF Entity, if there are accesses and movement that other can support the first S-NSSAI in the PLMN network of terminal device current accessed Property management function entity (e.g., the 3rd AMF entity), then terminal device is redirected to and supports the 3rd AMF of the first S-NSSAI real Body provides service by the 3rd AMF entity of " most suitable " for terminal device.Although the first AMF entity in the first PLMN as a result, Do not support the first S-NSSAI, the corresponding business of the first S-NSSAI still be able in the 2nd PLMN after terminal device is mobile by It realizes.The corresponding business of the NSSAI of premises equipment requests can meet as a result, improve the business experience of user.

In another aspect, disclosed herein as well is a kind of slice selection methods, comprising: the second access and mobile management function to ps domain Entity receives login request message, and login request message includes the corresponding NSSAI of slice and terminal that terminal device allows to access The temporary identifier of equipment, the corresponding NSSAI of slice for allowing to access include the 2nd S-NSSAI.Second access and mobile management Functional entity obtains the context of terminal device from the first access and mobile management function to ps domain entity, up and down according to temporary identifier Text includes instruction information.Instruction information is used to indicate the first access and mobile management function to ps domain entity and uses the 2nd S-NSSAI pairs The slice answered provides the corresponding business of the first S-NSSAI for terminal device.If the second access and mobile management function to ps domain entity are not Support the first S-NSSAI, but there are other can support the first S-NSSAI's in the PLMN network of terminal device current accessed Access and mobile management function to ps domain entity, then terminal device is redirected to branch by the second access and mobile management function to ps domain entity Hold third access and mobile management function to ps domain entity (for example, the 3rd AMF entity) of the first S-NSSAI.

According to above-mentioned slice selection scheme, after terminal device is mobile, the 2nd AMF entity is real to the first AMF before movement The context of body requesting terminal equipment, to know that the 2nd AMF entity is not most suitable AMF entity, if terminal device is worked as There are access and mobile management function to ps domain entities that other can support the first S-NSSAI in the PLMN network of preceding access, then will Terminal device is redirected to the 3rd AMF entity for supporting the first S-NSSAI, is set by the 3rd AMF entity of " most suitable " for terminal Standby offer service.Although the first AMF entity in the first PLMN does not support the first S-NSSAI, the first S-NSSAI corresponding as a result, Business still be able to be implemented in the 2nd PLMN after terminal device is mobile.The NSSAI of premises equipment requests is corresponding as a result, Business can meet, improve the business experience of user.

In a kind of possible design, this method further include: the second access and mobile management function to ps domain entity connect to third Enter the context that terminal device is sent with mobile management function to ps domain entity, context includes the instruction information.Therefore, finger is received Instruction information can be sent to PCF equipment and request PCF equipment by the third access and mobile management function to ps domain entity for showing information Update is related to the NSSP of the 2nd S-NSSAI.Updated NSSP restores to the content of " true " as a result,.Subsequent, terminal device can According to updated NSSP associated application and S-NSSAI, to obtain complete business.The NSSAI of premises equipment requests as a result, Corresponding business can meet, and improve the business experience of user.

On the other hand, disclosed herein as well is a kind of slice selection methods, comprising: third access and mobile management function to ps domain Entity obtains the context of terminal device, and context includes instruction information.Instruction information is used to indicate the first access and mobility Management function entity provides the corresponding business of the first S-NSSAI using the corresponding slice of the 2nd S-NSSAI for the terminal device. Third access and mobile management function to ps domain entity are sent to policy control functions equipment indicates that information, request strategy control function are set Standby update is related to the NSSP of the 2nd S-NSSAI.Updated NSSP includes the association applied between the first S-NSSAI.Third Access and mobile management function to ps domain entity receive updated NSSP from policy control functions equipment.

It is set according to above-mentioned slice selection scheme after terminal device is mobile by the 3rd AMF entity of " most suitable " for terminal Standby offer service.3rd AMF entity gets the context comprising instruction information, and instruction information is sent to PCF equipment simultaneously Request PCF equipment update is related to the NSSP of the 2nd S-NSSAI.Updated NSSP restores to the content of " true " as a result,.Afterwards Continuous, terminal device can be according to updated NSSP associated application and S-NSSAI, to obtain complete business.Terminal is set as a result, The corresponding business of NSSAI of standby request can meet, and improve the business experience of user.

Another aspect, disclosed herein as well is a kind of slice selection methods, comprising: policy control functions equipment connects from first Enter and receives instruction information with mobile management function to ps domain entity.Instruction information is used to indicate the first access and mobile management function to ps domain is real Body provides the corresponding business of the first S-NSSAI using the corresponding slice of the 2nd S-NSSAI for terminal device.Policy control functions are set Standby according to instruction information, update is related to the NSSP of the first S-NSSAI, sends more to the first access and mobile management function to ps domain entity The first NSSP after new.Wherein, updated first NSSP includes the association applied between the 2nd S-NSSAI.

According to above-mentioned slice selection scheme, when the first AMF entity does not support the first S-NSSAI and uses the 2nd S-NSSAI When corresponding slice provides the first S-NSSAI corresponding business for terminal device, PCF equipment will be related to the first S-NSSAI's NSSP is updated, so that updated NSSP includes the association applied between the 2nd S-NSSAI.It is not supported as a result, The corresponding business of first S-NSSAI will not be abandoned, but by the corresponding slice of the 2nd S-NSSAI on behalf of offer.And pass through PCF Update of the equipment to NSSP, terminal device, which can perceive the corresponding business of the first S-NSSAI, to be cut by the 2nd S-NSSAI is corresponding Piece replaces offer.The corresponding business of the NSSAI of premises equipment requests can meet, and improve the business experience of user.

In a kind of possible design, this method further include: policy control functions equipment is accessed from third and mobility pipe It manages functional entity and receives the instruction information；Policy control functions equipment is related to the 2nd S- according to instruction information, update The NSSP of NSSAI, updated 2nd NSSP includes the association applied between the first S-NSSAI；Policy control functions equipment Updated 2nd NSSP is sent to third access and mobile management function to ps domain entity.Therefore, after terminal device is mobile, Service is provided by the 3rd AMF entity of " most suitable " for terminal device.3rd AMF entity will indicate that information is sent to PCF equipment And the update of PCF equipment is requested to be related to the NSSP of the 2nd S-NSSAI.Updated NSSP restores to the content of " true " as a result,.Afterwards Continuous, terminal device can be according to updated NSSP associated application and S-NSSAI, to obtain complete business.Terminal is set as a result, The corresponding business of NSSAI of standby request can meet, and improve the business experience of user.

Another aspect, disclosed herein as well is a kind of slice selection methods, comprising: terminal device judges end according to NSSP Whether the current location of end equipment is in the coverage of corresponding first slice of the first S-NSSAI.Wherein, which includes the Association between the coverage of the slice of one S-NSSAI and first.When the current location of terminal device is in the service of the first slice In region, terminal device sends login request message.Login request message carries the first S-NSSAI.First S-NSSAI is used for The first slice of selection.

The present bit of terminal device is first judged before terminal device initiates registration request according to above-mentioned slice selection scheme It sets whether in the coverage of the corresponding slice of the first S-NSSAI in the NSSAI of request.Only when the present bit of terminal device It sets in service area, just includes in the NSSAI of login request message the first S-NSSAI.Avoid as a result, core net because It can not support the S-NSSAI of premises equipment requests and refuse the registration request of terminal device, save terminal device and core net Between Signalling exchange.

In a kind of possible design, the step of above-mentioned judgement includes: that terminal device periodically judges that the terminal is set Whether the corresponding base station in standby current location is in the coverage of first slice.Therefore, if terminal device is at first In the coverage of the corresponding slice of the first S-NSSAI of the position at quarter not in the NSSAI of request, when terminal device is subsequent Second moment determined in the coverage of the corresponding slice of the first S-NSSAI of the position of terminal device in the NSSAI of request, Still new registration request can be initiated, to obtain corresponding business.

Another aspect, the embodiment of the present application provide a kind of access and mobile management function to ps domain entity, the session management function Energy entity is accessed with the first access in the realization above method with mobile management function to ps domain entity, second and mobile management function to ps domain Entity or the function of third access and the behavior of mobile management function to ps domain entity.The function can be by hardware realization, can also be with Corresponding software realization is executed by hardware.The hardware or software include one or more moulds corresponding with above-mentioned function Block.It is described including processor and transceiver in the structure of access and mobile management function to ps domain entity in a possible design Processor be configured as processing first access and mobile management function to ps domain entity, second access and mobile management function to ps domain entity or Third access and mobile management function to ps domain entity execute corresponding function in the above method.The transceiver connects for realizing first Enter and mobile management function to ps domain entity, the second access and mobile management function to ps domain entity or third access and mobile management function to ps domain Entity is set with other accesses and mobile management function to ps domain entity/policy control functions equipment/user data management equipment/access net Communication between standby.The access and mobile management function to ps domain entity can also include memory, and the memory is used for and place Device coupling is managed, the necessary program instruction of conversation management functional entity and data are saved.

Another aspect, the embodiment of the present application provide a kind of policy control functions equipment, policy control functions equipment tool There is the function of realizing policy control functions equipment behavior in the above method.The function can also be led to by hardware realization It crosses hardware and executes corresponding software realization.The hardware or software include one or more modules corresponding with above-mentioned function. It include processor and transceiver in the structure of policy control functions equipment in a possible design, the processor is matched It is set to dealing strategy control function device and executes corresponding function in the above method.The transceiver is for realizing policy control function Communication between energy equipment and access and mobile management function to ps domain entity.The policy control functions equipment can also include storage Device, the memory save the necessary program instruction of conversation management functional entity and data for coupling with processor.

Another aspect, the embodiment of the present application provide a kind of terminal device, which, which has, realizes in the above method The function of terminal device behavior.The function can also execute corresponding software realization by hardware realization by hardware. The hardware or software include one or more modules corresponding with above-mentioned function.In a possible design, terminal is set It include processor and transceiver in standby structure, the processor is configured to processing terminal equipment executes in the above method accordingly Function.The transceiver is for realizing between terminal device and access and mobile management function to ps domain entity/access network equipment Communication.The terminal device can also include memory, and the memory saves session management function for coupling with processor It can the necessary program instruction of entity and data.

Another aspect, the embodiment of the present application provide a kind of computer readable storage medium, the computer-readable storage Instruction is stored in medium, when run on a computer, so that computer executes method described in above-mentioned various aspects.

Another aspect, the embodiment of the present application provide a kind of computer program product comprising instruction, when it is in computer When upper operation, so that computer executes method described in above-mentioned various aspects.

Another aspect, this application provides a kind of chip system, which includes processor, for supporting above-mentioned connect Enter and realize function involved in above-mentioned aspect with mobile management function to ps domain entity, policy control functions equipment or terminal device, For example, generating or handling information involved in the above method.In a kind of possible design, the chip system further includes depositing Reservoir, the memory, for saving the necessary program instruction of data transmitting equipment and data.The chip system, can be by core Piece is constituted, and also may include chip and other discrete devices.

Detailed description of the invention

The accompanying drawings required for describing the embodiments of the present invention are briefly described below.

Fig. 1 can only support the schematic diagram of the part S-NSSAI of premises equipment requests for AMF entity in the prior art；

Fig. 2 is the schematic diagram for the communication system based on network slice that the embodiment of the present invention is applicable in；

Fig. 3 is the signaling interaction diagram according to the slice selection method of the embodiment of the present invention；

Fig. 4 is the schematic diagram according to the terminal device of embodiment of the present invention gravity treatment AMF entity after mobile；

Fig. 5 is the signaling interaction diagram according to the slice selection method of the embodiment of the present invention；

Fig. 6 to Fig. 9 is the flow diagram according to the slice selection method of the embodiment of the present invention；

Figure 10 is the flow diagram according to the slice selection method of another embodiment of the present invention；

Figure 11 A, the 11B embodiment of the present invention AMF entity structural schematic diagram；

Figure 12 A, 12B are the structural schematic diagram according to the PCF entity of the embodiment of the present invention；

Figure 13 A, 13B are the structural schematic diagram according to the terminal device of the embodiment of the present invention.

Specific embodiment

Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is clearly retouched It states.

The embodiment of the present application is based on proposing a solution in communication system shown in Fig. 2, is applicable to next For the selection for realizing network slice in mobile network (such as 5G network) framework.For example, in 5G mobile network architecture, mobile gateway Control plane function and the decoupling of forwarding surface function, the control plane function separated and third generation partner program (third Generation partnership project, 3GPP) traditional control network element MME etc. is merged into unified control plane (control plane) entity.User face UPF entity is able to achieve gateway (serving gateway, SGW) and packet count According to the user plane functions (SGW-U and PGW-U) of network gateway (packet data network gateway, PGW).Further , unified control face entity can resolve into access and mobile management function to ps domain (access and mobility Management function, AMF) entity and conversation management functional (session management function, SMF) be real Body.Wherein, AMF entity can be responsible for attachment, mobile management, tracing section updating process of terminal device etc..SMF entity can be responsible for The session management of terminal device, the selection of user face equipment, the gravity treatment of user face equipment, network protocol (internet Protocol, IP) address distribution, the foundation of service quality (quality of service, QoS) control and session, modification With release etc..

In addition, the embodiment of the present application can be applicable to other communication technologys to face the future.The embodiment of the present application description System architecture and business scenario be technical solution in order to more clearly illustrate the embodiment of the present application, do not constitute for The restriction of technical solution provided by the embodiments of the present application, those of ordinary skill in the art it is found that with the network architecture differentiation and The appearance of new business scene, technical solution provided by the embodiments of the present application are equally applicable for similar technical problem.

As shown in Fig. 2, the embodiment of the present application provides a kind of communication system based on network slice.For example, the communication system System includes at least terminal device 202, access network equipment 204 and multiple networks slice, such as: network slice 1 and network slice 2. In the following description, it is described with the abbreviation " slice " of " network slice ", in addition, each slice is alternatively referred to as " slice example (slice instance) " or " network is sliced example (network slice instance) ", the application does not limit herein.

Terminal device 202 can access one or access multiple slices simultaneously.In the example in figure 2, slice 1 and slice 2 can With shared part control plane, the control plane function of alternatively referred to as sharing (common control network function, CCNF).Wherein, the control plane that slice 1 and slice 2 can be shared includes AMF entity 206.In addition, conversation management functional is to cut Piece is distinctive, this part control function needs to instantiate in slice.In order to realize the isolation of data routing, user plane functions It needs to instantiate in slice.In other words, conversation management functional and user plane functions are that slice is proprietary, for realizing slice Specific service.For example, including SMF entity 208a and user entity 210a in slice 1 in the example in figure 2；Slice 2 In include SMF entity 208b and user entity 210b.

Wherein, terminal device 202 (terminal device) involved in the embodiment of the present application may include various Handheld device, mobile unit, wearable device with wireless communication function calculate equipment or are connected to radio modem Other processing equipments.The terminal device is referred to as user equipment (user equipment, UE), mobile station (mobile station, MS), terminal (terminal) can also include subscriber unit (subscriber unit), honeycomb electricity Talk about (cellular phone), smart phone (smart phone), wireless data card, personal digital assistant (personal Digital assistant, PDA) computer, plate computer, radio modem (modem), handheld device (handheld), laptop computer (laptop computer), wireless phone (cordless phone) or Wireless Local Loop Road (wireless local loop, WLL) platform, machine type communication (machine type communication, MTC) are eventually End etc..

In the embodiment of the present application involved access network equipment be one kind be deployed in wired or wireless access net in The device of wireless communication function is provided for terminal device 102.The access network equipment may include various forms of base stations, example Such as: macro base station, micro-base station (also referred to as small station), relay station, access point etc..In the system using different wireless access technologys In, the title for having the equipment of base station functions may be different, for example, in LTE system, the referred to as node B of evolution (evolved NodeB, eNB or eNodeB), in the third generation (3rd generation, 3G) system, referred to as node B (Node B) etc..In system of new generation, referred to as gNB (gNodeB).

Involved AMF entity can be responsible for the attachment, mobile management, tracking area of terminal device in the embodiment of the present application More new technological process etc..AMF entity is alternatively referred to as AMF equipment or AMF network element.In the example in figure 2, an AMF entity is illustrated only. However, the present invention is not intended to limit the quantity of AMF entity.Different AMF entities can connect to different slices, also can connect To identical slice.

In the example in figure 2, slice 1 and slice 2 respectively include SMF entity: SMF entity 208a and 208b.This Shen SMF entity that please be involved in embodiment can be responsible for the session management of terminal device, and the selection of user entity, user face are real Foundation, modification and the release of gravity treatment, IP address distribution, QoS control and the session of body.SMF entity is alternatively referred to as SMF equipment Or SMF network element.

In addition, in the example in figure 2, slice 1 and slice 2 respectively include a UPF entity: UPF entity 210a and UPF are real Body 210b.UPF entity 210a and UPF entity 210b can be connected to identical or different data network (data network, DN), It is transmitted for realizing the data of business.UPF entity is alternatively referred to as UPF equipment or UPF network element.

Optionally, which further includes user data management (user data management, UDM) equipment 212. UDM equipment 212 is used to store the subscription data of user, such as: the relevant subscription data of mobile management and session management phase The subscription data of pass.UDM equipment is alternatively referred to as UDM entity or UDM network element.

Optionally, which further includes policy control functions (policy control function, PCF) equipment 214.PCF equipment 214 includes policy control and the function based on flow based charging control.For example, PCF equipment 214 can realize that user signs About data management function, policy control functions, charging policy control function, QoS control etc..PCF equipment can be also referred to as PCF entity Or PCF network element.

Above-mentioned based under the communication system of network slice, include to the connection of the user face of data network by slice foundation Two steps: the first step selects the AMF entity for supporting NSSAI by register flow path；Second step, by slice, establish one or Multiple Packet Data Unit (packet data unit, PDU) sessions to data network.That is, suitable in order to select Slice provide service for terminal device, first choice needs to select suitable AMF entity.

It should be noted that terminal device 202 can access one or access multiple slices simultaneously.Each slice can provide Different business.In addition, operator can also be laid out multiple slices to provide identical business for different user groups.

The type of slice can be identified by S-NSSAI.NSSAI is the set of S-NSSAI.Each S-NSSAI is for assisting Network selects a specific network to be sliced example.It is real that identical network slice may also be chosen by different S-NSSAI Example.

At each PLMN, the corresponding NSSAI of slice of configuration access is being locally stored (subsequent in terminal device 202 The referred to as NSSAI, configured NSSAI of configuration in description).Into the process for the initial registration that network is initiated, terminal The S-NSSAI in the NSSAI of configuration can be used as the corresponding NSSAI of slice of request access (in subsequent descriptions in equipment 202 In referred to as request NSSAI, requested NSSAI), to carry out slice selection.Access network equipment is according to request NSSAI selects suitable AMF entity, and initial registration request message is sent to the AMF entity.In initial registration process, Terminal device 202 obtains the corresponding NSSAI of slice for allowing to access under the PLMN (in subsequent descriptions referred to as from core net The NSSAI of permission, allowed NSSAI) and store.Each S-NSSAI in the NSSAI of permission is registered in terminal device 202 AMF registration area under be effective.When subsequent terminal 202 initiating business request of equipment, above-mentioned permission can be provided to network NSSAI, to carry out slice selection.In addition, after terminal device 202 successfully completes initial registration process, if core net needs The NSSAI of the permission of the terminal device 202 is updated, then can pass through the mobile management (mobility of network-triggered Management, MM) process updates the NSSAI of the permission that terminal device 202 is locally stored.

Below with reference to Fig. 3 to Fig. 6 embodiment introduce the embodiment of the present application a kind of network slice selection method.

As shown in figure 3, step 301, terminal device 202 sends login request message to access network equipment 204.Wherein, it infuses The NSSAI of request is carried in volume request message.

It is that terminal device 202 selects AMF real according to the NSSAI of request after access network equipment 204 receives login request message Body.If can satisfy all S-NSSAI in the NSSAI of request, access network equipment 204 without AMF entity in current PLMN According to local policy information, the first AMF entity is selected.

For example, the NSSAI of request includes S-NSSAI 2,3,4.S- can be supported simultaneously without AMF entity in current PLMN NSSAI2,3,4.S-NSSAI 3 in the NSSAI of the first AMF entity support request in current PLMN, 4, but do not support to ask S-NSSAI 2 in the NSSAI asked.Access network equipment selects the first AMF entity according to local policy information.

Later, access network equipment 204 sends the login request message of the NSSAI comprising request to the first AMF entity.

Step 302, after the first AMF entity receives login request message, the attribute information of the first S-NSSAI is obtained.

Wherein, the first S-NSSAI be in the NSSAI of request the S-NSSAI that does not support of the first AMF entity (for example, above-mentioned S-NSSAI 2).First AMF entity does not support the first S-NSSAI, indicates that the first AMF entity is corresponding with the first S-NSSAI and cuts Piece is not attached to.The attribute information of first S-NSSAI is used to indicate, if current PLMN does not support a S-NSSAI, if allow It the use of the corresponding slice of other S-NSSAI is that terminal device 202 provides the corresponding business of the first S-NSSAI.For example, herein " other S-NSSAI " can be the S-NSSAI (default S-NSSAI) of default.

Optionally, the first S-NSSAI preferentially can be replaced by other S-NSSAI in the NSSAI that requests.

For example, the first AMF entity sends request message to UDM equipment 212 or PCF equipment 214, carried in the request message The permanent identification of terminal device 202, slice signing policy information of the request message message for requesting terminal equipment 202.The One AMF entity receives the response message comprising slice signing policy information.Slice signing policy information includes that terminal device 202 is signed The attribute information of each S-NSSAI and each S-NSSAI in NSSAI about.For example, the NSSAI packet that terminal device 202 is contracted S-NSSAI 2 is included, the slice signing policy information that the 3,4, the first AMF entity is got is as shown in table 1:

S-NSSAI 2	S-NSSAI 3
		S-NSSAI 3	X
S-NSSAI 4	X

Table 1

Wherein, first row indicates that each S-NSSAI in the NSSAI of the signing of terminal device 202, secondary series indicate each S-NSSAI Attribute information.In the example of table 1, in the first row, the attribute information of S-NSSAI2 is S-NSSAI 3, indicates S-NSSAI 2 Corresponding business can be replaced the corresponding slice of S-NSSAI 2 to provide by the corresponding slice of S-NSSAI 3.In second row, S- The attribute information of NSSAI 3 is null value, indicates that the corresponding business of S-NSSAI3 being capable of generation without the corresponding slice of other S-NSSAI It replaces, it in other words, also can without no corresponding slice of other S-NSSAI if current PLMN cannot support S-NSSAI 3 Instead of providing the corresponding business of S-NSSAI 3.Similarly, in the third line, the attribute information of S-NSSAI 3 is also null value.

After receiving the response message comprising slice signing policy information, the first AMF entity can be from slice signing policy information The middle attribute information for obtaining the first S-NSSAI.

Step 303, the first AMF entity is terminal device using the corresponding slice of the 2nd S-NSSAI according to attribute information 202 provide the corresponding business of the first S-NSSAI.

For example, the first AMF entity according to attribute information, knows that the 2nd S-NSSAI can replace the first S-NSSAI to provide the The corresponding business of one S-NSSAI.For example, the corresponding business of above-mentioned S-NSSAI 2 can be mentioned by the corresponding slice of S-NSSAI 3 For.In other words, the 2nd S-NSSAI is to be determined according to above-mentioned attribute information, the first S-NSSAI can be replaced to provide the first S- The S-NSSAI of the corresponding business of NSSAI.For example, the 2nd S-NSSAI is S-NSSAI 3.Optionally, the 2nd S-NSSAI is request NSSAI in S-NSSAI.

Since the first AMF entity supports S-NSSAI 3,4, and the corresponding business of S-NSSAI 2 can be right by S-NSSAI 3 The slice answered provides, in this way, being equal to support the first AMF entity of S-NSSAI 3,4 can provide for terminal device 202 to cut The corresponding business of piece S-NSSAI 2,3,4.Therefore it is terminal that the corresponding slice of the 2nd S-NSSAI, which can be used, in the first AMF entity Equipment 202 provides the corresponding business of the first S-NSSAI, for the service of terminal device 202.

Step 304, the first AMF entity adds instruction information (indication) in the context of terminal device 202, should It is that terminal device 202 provides the first S- that instruction information, which is used to indicate the first AMF entity using the corresponding slice of the 2nd S-NSSAI, The corresponding business of NSSAI.For example, it is terminal that instruction information, which is used to indicate the first AMF entity using the corresponding slice of S-NSSAI 3, Equipment 202 provides the corresponding business of S-NSSAI 2.

Optionally, the slice signing policy information received can be also added to the upper and lower of terminal device 202 by the first AMF entity Text.

Step 305, the first AMF entity sends request message to PCF equipment 214.The request message carries above-mentioned instruction letter Breath.For example, request message is that network is sliced selection strategy (network slicing selection policy, NSSP) update Request message.

Step 306, after PCF equipment 214 receives request message, according to instruction information update NSSP, and to the first AMF entity Send the response message for carrying the NSSP updated.For example, being stored in PCF equipment 214 before PCF equipment 214 receives request message The NSSP of terminal device 202 is as shown in table 2:

NSSP rule 1	Using A	S-NSSAI 2
			NSSP rule 2	Using B	S-NSSAI 2
NSSP rule 3	Using C	S-NSSAI 3
			NSSP rule 4	Using D	S-NSSAI 4

Table 2

NSSP includes one or more NSSP rule, every NSSP rule will using (application) and S-NSSAI into Row association.For example, in the NSSP of terminal device 202, NSSP rule 1 is associated with using A and S-NSSAI 2, NSSP regular 2 with answer It is associated with B with S-NSSAI 2.In other words, it needs to select to cut according to NSSP rule 1 and rule 2 respectively using A and application B Piece, and application A slice type corresponding with application B all corresponds to S-NSSAI 2.And so on, NSSP rule 3 and application C and S- NSSAI 3 is associated with, and NSSP rule 4 is associated with using D and S-NSSAI 4.

After PCF equipment 214 receives the request message for carrying instruction information, the NSSP of terminal device 202 is updated.For example, PCF Equipment 214 is involved in the NSSP rule of the first S-NSSAI, is all updated to close with the 2nd S-NSSAI (such as S-NSSAI 3) Connection.Updated NSSP is known as the first NSSP, the association including application and the 2nd S-NSSAI.For example, the first NSSP such as 3 institute of table Show:

NSSP rule 1	Using A	S-NSSAI 3(flag)
			NSSP rule 2	Using B	S-NSSAI 3(flag)
NSSP rule 3	Using C	S-NSSAI 3
			NSSP rule 4	Using D	S-NSSAI 4

Table 3

For example, PCF equipment 214 when generating a NSSP, increases flag bit (flag) in the NSSP rule of modification, it should Flag bit, which is used to indicate corresponding first S-NSSAI of NSSP rule, becomes the 2nd S-NSSAI by core net modification, to will repair Be changed to the 2nd S-NSSAI associated NSSP rule, with, it is unmodified inherently with the associated NSSP rule of the 2nd S-NSSAI It distinguishes.

For example, in table 3, in 2 corresponding 2nd S-NSSAI of NSSP rule 1 and NSSP rule (that is, S-NSSAI 3) increase flag bit (flag), for distinguishing the difference of NSSP rule 1,2 Yu NSSP rule 3: where NSSP 1 He of rule NSSP rule 2 will be applied and the 2nd associated rule of S-NSSAI after modifying by core net.And NSSP rule 3 is without core The modification of heart net will inherently apply and the 2nd associated rule of S-NSSAI.

Later, PCF equipment 214 sends response message to the first AMF entity.The response message carries the first NSSP.

Step 307, the first AMF entity sends registration received message to terminal device 202 by access network equipment 204.Note Volume received message includes the NSSAI of the first NSSP and permission.Wherein, the NSSAI of permission includes above-mentioned 2nd S-NSSAI.Example Such as, S-NSSAI 3 is the 2nd S-NSSAI, and the NSSAI of permission includes S-NSSAI 3,4.

In addition, registering received message further includes the temporary identifier that the first AMF entity distributes as terminal device 202.For example, facing When mark include the whole world 5G- unique temporary identity (5G-globally unique temporay identifier, 5G- GUTI).Wherein, the first AMF entity be the temporary identifier that terminal device 202 distributes include for identifying the first AMF entity the One field (for example, identification information of the first AMF), and for of the unique identification terminal device 202 in the first AMF entity Two fields.

Step 308, terminal device 202 stores the first NSSP.In addition, terminal device 202 also stores the NSSAI of permission.

Subsequent, terminal device 202 selects corresponding S-NSSAI according to the first NSSP associated application and S-NSSAI, for application To initiate session establishment process.For example, data transmission is initiated in some application of terminal device 202, terminal device 202 is according to first NSSP to select S-NSSAI for the application.For example, transmitting for the data initiated using A, terminal device 202 is according to the first NSSP In NSSP rule 1 select S-NSSAI 3, to core net send carry S-NSSAI 3 session establishment request message, by core Net continues session establishment process.

According to the slice selection method of the embodiment of the present application, the first AMF entity is obtained from UDM equipment 212 or PCF equipment 214 Attribute information is taken, it is corresponding using the 2nd S-NSSAI when the first AMF entity does not support a S-NSSAI according to attribute information Slice be terminal device 202 the corresponding business of the oneth S-NSSAI is provided.The first not supported S-NSSAI is corresponding as a result, Business will not be abandoned, but by the corresponding slice of the 2nd S-NSSAI on behalf of offer.In addition, PCF equipment 214 will be related to accordingly To the NSSP rule of the first S-NSSAI, all it is updated to be associated with the 2nd S-NSSAI.Therefore, terminal device 202 receives NSSP rule After then, it is by the corresponding slice of the 2nd S-NSSAI on behalf of offer that terminal, which can perceive the corresponding business of the first S-NSSAI,.By This, the corresponding business of the NSSAI that terminal device 202 is requested can meet, and improve the business experience of user.

After terminal device 202 is moved to two PLMN from the first PLMN, need to reselect AMF entity.Such as Fig. 4 institute Show, above-mentioned first AMF is physically located in the first PLMN, includes the 2nd AMF entity and the 3rd AMF entity in the 2nd PLMN.For example, 2nd AMF entity supports S-NSSAI 3, the 4, the 3rd AMF entity to support S-NSSAI 2,3,4.Due to being stored in terminal device 202 The NSSAI of permission include S-NSSAI 3,4, initiate periodic registration again after movement when terminal device 202 and update request When process, the NSSAI that terminal device 202 is requested is the NSSAI allowed.Therefore, the 2nd AMF entity and the 3rd AMF entity be all It is able to satisfy the request of terminal device 202.According to the scheme of the application, terminal device 202 can be by the 2nd AMF entity of " secondary suitable " The 3rd AMF entity of " most suitable " is redirected to be serviced, to improve the business experience of user.

It is described further below with reference to the signaling interaction diagram of Fig. 5.

Before step 501, terminal device 202 is located in the first PLMN, and terminal device 202 is registered to by register flow path One AMF entity.For example, terminal device 202 is registered to the first AMF entity by the step 301 in above-mentioned Fig. 3 to 308.Herein It repeats no more.

Step 501, when terminal device 202 is moved in the 2nd PLMN from the first PLMN, terminal device 202 is to the 2nd PLMN Interior access network equipment 204 ' sends login request message.

Wherein, the NSSAI of request is carried in login request message.At this point, the NSSAI of request is the preservation of terminal device 202 Permission NSSAI.In Fig. 5, the NSSAI for the permission that UE is carried in step 501 is referred to as the NSSAI of the first permission, the One NSSAI allowed includes above-mentioned 2nd S-NSSAI.For example, the first NSSAI allowed includes S-NSSAI 3,4.

In addition, further including the temporary identifier that above-mentioned first AMF entity is the distribution of terminal device 202 in login request message. At this point, temporary identifier is alternatively referred to as old temporary identifier.

It step 502, is terminal device 202 according to the NSSAI of request after access network equipment 204 ' receives login request message Select AMF entity.

For example, the access network equipment 204 ' in the 2nd PLMN is according to terminal device 202 due to the movement of terminal device 202 Old temporary identifier can not identify the first AMF entity.Therefore, access network equipment 204 ' is eventually according to the NSSAI of request again End equipment 202 selects AMF entity.

For example, the NSSAI of request includes S-NSSAI 3,4.The 2nd AMF entity in 2nd PLMN supports request The 3rd AMF entity in S-NSSAI 3 in NSSAI, the 4, the 2nd PLMN also additionally supports S-NSSAI 2.Access network equipment root According to local policy information, the 2nd AMF entity is selected.

Step 503, access network equipment 204 ' sends login request message to the 2nd AMF entity.The login request message packet Include the NSSAI of above-mentioned request and the old temporary identifier of terminal device 202.

Step 504, after the 2nd AMF entity receives login request message, according to the old temporary identifier of terminal device 202, The context of terminal device 202 is obtained to the first AMF entity.

For example, the 2nd AMF entity knows according to above-mentioned first field in the old temporary identifier of terminal device 202 The identification information of one AMF entity, to obtain the context of terminal device 202 to the first AMF entity requests.Due to (example before Such as, it is added in the context of terminal device 202 by the first AMF entity of the step 304) in Fig. 3 and is used to indicate the first AMF Entity is that terminal device 202 provides the instruction letter of the corresponding business of the first S-NSSAI using the corresponding slice of the 2nd S-NSSAI Breath, the context for the terminal device 202 that the 2nd AMF entity is got from the first AMF entity includes above-mentioned instruction information.

Meanwhile the 2nd AMF entity from the first AMF entity obtain terminal device 202 context in further include terminal device 202 slice signing policy information.

Step 505, if the 2nd AMF entity does not support the first S-NSSAI, the 2nd AMF entity to redirect terminal device 202 The 3rd AMF entity of the first S-NSSAI is supported in the 2nd PLMN.

For example, the 2nd AMF entity based on context in instruction information, know: before, the corresponding industry of the first S-NSSAI It is that terminal device 202 provides that business, which is by the corresponding slice of the 2nd S-NSSAI,.It is received in conjunction with the 2nd AMF entity in step 503 Request NSSAI (including the 2nd S-NSSAI), the 2nd AMF entity would know that: terminal device 202 " reality " request NSSAI Including at least the first S-NSSAI.Therefore, it is the AMF entity that terminal device 202 services that the 2nd AMF entity, which is not " most suitable ",. If there is other AMF entities (for example, the 3rd AMF entity) for supporting the first S-NSSAI, the 2nd AMF entity in the 2nd PLMN Terminal device 202 is redirected to the 3rd AMF entity that the first S-NSSAI is supported in the 2nd PLMN.Moreover, the 2nd AMF entity The slice for including in the context obtained according to step 504 is contracted policy information, knows that terminal device 202 has contracted first S-NSSAI then can provide the first S-NSSAI there are AMF entity (for example, the 3rd AMF entity) in current PLMN for UE and correspond to Slice service.

Alternatively, the 2nd AMF entity is known after obtaining instruction information: the NSSAI of terminal device 202 " reality " request is extremely It less include the first S-NSSAI and the 2nd S-NSSAI.Therefore, it is that terminal device 202 takes that the 2nd AMF entity, which is not " most suitable ", The AMF entity of business, and then terminal device 202 is redirected in the 2nd PLMN and supports the first S-NSSAI's and the 2nd S-NSSAI 3rd AMF entity.Moreover, the slice signing policy information for including in the context that the 2nd AMF entity is obtained according to step 504, Know that terminal device 202 has been contracted the first S-NSSAI and the 2nd S-NSSAI, then, there are AMF entity (examples in current PLMN Such as, the 3rd AMF entity) it can be provided for UE while the first S-NSSAI and the 2nd S-NSSAI corresponding slice service.

For example, the 2nd AMF entity can select the 3rd AMF entity by following three kinds of implementations, however, of the invention And without limitation to the method for the 3rd AMF entity of the 2nd AMF entity selection.

In the first possible implementation, the 2nd AMF is physically configured with other AMF entities in current 2nd PLMN Identification information and corresponding ability information (S-NSSAI of support), the 2nd AMF entity is according to the ability information of other AMF It determines that the 3rd AMF entity can support the first S-NSSAI, and obtains the identification information of the 3rd AMF entity.

In the second possible implementation, the 2nd AMF entity is sliced selection function (network to network Slicing selection function, NSSF) network element sends request message, target AMF entity is carried in the request message The S-NSSAI (for example, the first S-NSSAI) needed support.After NSSF receives request message, determine that the 3rd AMF entity can prop up The first S-NSSAI is held, response message is sent to the 2nd AMF entity, the mark letter of the 3rd AMF entity is carried in the response message Breath.

In the third possible implementation, the 2nd AMF entity is to network function discovery feature (Network Repository Function, NRF) network element sends request message, and target AMF entity is carried in the request message to be needed support S-NSSAI (for example, the first S-NSSAI).After NRF receives request message, determine that the 3rd AMF entity can support the first S- NSSAI sends response message to the 2nd AMF entity, the identification information of the 3rd AMF entity is carried in the response message.

For example in conjunction with above example, the NSSAI for the request that the 2nd AMF entity is received by step 503 includes S-NSSAI 3,4.2nd AMF entity obtains instruction information by step 504: the first AMF entity is corresponding using S-NSSAI 3 Slice is that terminal device 202 provides the corresponding business of S-NSSAI 2.The 2nd AMF entity knows that terminal device 202 is " real as a result, The NSSAI of border " request includes S-NSSAI 2,3,4.Since the 2nd AMF entity only supports S-NSSAI 3,4 but do not support S- NSSAI 2, the 2nd AMF entity are not that " most suitable " is the AMF entity that terminal device 202 services.Due in the 2nd PLMN In the presence of the 3rd AMF entity for supporting S-NSSAI 2,3,4 simultaneously, terminal device 202 is redirected to and supports S- by the 2nd AMF entity The 3rd AMF entity of NSSAI 2,3,4.

For example, can be redirected by the following two kinds implementation:

In one possible implementation, the 2nd AMF entity can be by access network equipment 204 ' by terminal device 202 The login request message of transmission is forwarded to the 3rd AMF entity, that is, the 2nd AMF entity first asks the registration that terminal device 202 is sent The identification information of message and the 3rd AMF entity is asked to be sent to access network equipment 204 ', access network equipment 204 ' is according to the 3rd AMF reality The login request message that terminal device 202 is sent is forwarded to the 3rd AMF entity by the identification information of body.

In alternatively possible implementation, the 2nd AMF entity directly will according to the identification information of the 3rd AMF entity The login request message that terminal device 202 is sent is forwarded to the 3rd AMF entity.

In above two implementation, the 2nd AMF entity forwarding terminal device 202 send login request message with The parameter carried in step 501 is identical.Specific descriptions are shown in step 501.

It is that terminal device 202 services by the 3rd AMF entity after the completion of redirection.

Step 506, the 3rd AMF entity sends request message to PCF equipment 214.The request message carries above-mentioned instruction letter Breath, for requesting the update of PCF equipment 214 to be related to the NSSP of the 2nd S-NSSAI.For example, request message is network slice selection plan Slightly update request message.

For example, the 3rd AMF entity, which first passes through under type such as, obtains above-mentioned instruction information:

The first possible implementation: during above-mentioned redirection, the 2nd AMF entity will include instruction information Context transfer is to the 3rd AMF entity.

Second of possible implementation: during above-mentioned redirection, the 3rd AMF entity obtains terminal device 202 Old temporary identifier.Later, the 3rd AMF entity is obtained according to the old temporary identifier of terminal device 202 from the first AMF entity Take the context of the terminal device 202 comprising instruction information.

Step 507, after PCF equipment 214 receives request message, according to instruction information update NSSP, and to the first AMF entity Send the response message for carrying the NSSP updated.

For example, the NSSP of the terminal device 202 stored in PCF equipment 214 is as above before PCF equipment 214 receives request message State table 3.After PCF equipment 214 receives the request message for carrying instruction information, it is involved in the NSSP rule of the 2nd S-NSSAI, all It is updated to be associated with the first S-NSSAI (such as S-NSSAI 2).

For example, increasing in the NSSP rule of modification when generating a NSSP of terminal device 202 due to PCF equipment 214 Flag bit, being used to indicate corresponding first S-NSSAI of NSSP rule by core net modification becomes the 2nd S-NSSAI, thus will Be revised as with the 2nd S-NSSAI associated NSSP rule, and unmodified inherently advises with the associated NSSP of the 2nd S-NSSAI Then distinguish.So, it after PCF equipment 214 receives the request message that step 507 carries instruction information, knows to repair before The 2nd S-NSSAI for including in the NSSP rule changed is updated to the first S-NSSAI.For example, PCF equipment 214 is according to the mark in table 3 Will position can determine the NSSP rule modified before NSSP 1 and NSSP of rule rule 2 is, then advise NSSP 1 and NSSP of rule The 2nd S-NSSAI (i.e. S-NSSAI 3) for then including in 2 is updated to the first S-NSSAI (that is, S-NSSAI 2).Although NSSP is advised Then 3 also include the 2nd S-NSSAI (i.e. S-NSSAI 3), but since NSSP rule 3 does not include flag bit, is not then needed pair 2nd S-NSSAI modifies.

Updated NSSP is the 2nd NSSP, the association including application and the first S-NSSAI.For example, the 2nd NSSP is as above It states shown in table 2.

Later, PCF equipment 214 sends response message to the 3rd AMF entity.The response message carries the 2nd NSSP.

Step 508, the 3rd AMF entity sends registration received message to terminal device 202 by access network equipment 204.Note Volume received message includes the NSSAI that the 2nd NSSP and second allows.

For example, the 3rd AMF entity according to terminal device 202 in a registration request message entrained request NSSAI (i.e. First NSSAI allowed), the slice type supported of the signing information of terminal device 202 and the 3rd AMF entity determine second The NSSAI of permission.Second NSSAI allowed includes above-mentioned first S-NSSAI.Optionally, the second NSSAI allowed further includes the Two S-NSSAI.For example, S-NSSAI 2 is the first S-NSSAI, S-NSSAI 3 is the 2nd S-NSSAI.Second NSSAI allowed Including S-NSSAI 2,3,4.

In addition, registering received message further includes the temporary identifier that the 3rd AMF entity distributes as terminal device 202.For example, facing When mark include 5G-GUTI.5G-GUTI at this time is new temporary identifier.Wherein, the new temporary identifier of terminal device 202 Including the first field (for example, identification information of the 3rd AMF) for identifying the 3rd AMF entity, and in the 3rd AMF reality Second field of internal unique identification terminal device 202.

Step 509, terminal device 202 stores the 2nd NSSP.In addition, terminal device 202 also updates the second permission NSSAI。

Subsequent, terminal device 202 selects corresponding S-NSSAI according to the 2nd NSSP associated application and S-NSSAI, for application To initiate session establishment process.For example, transmitting for the data initiated using A, terminal device 202 is according to the NSSP in the 2nd NSSP Rule 1 selects S-NSSAI 2, the session establishment request message for carrying S-NSSAI 2 is sent to core net, by core net after extended meeting Talk about establishment process.

According to the slice selection method of the embodiment of the present application, after terminal device 202 is mobile, access network equipment 204 is selected Context from the 2nd AMF entity to the first AMF entity requests terminal device 202 before movement, to know the 2nd AMF entity It is not most suitable AMF entity, and terminal device 202 is redirected to the third for supporting the first S-NSSAI and the 2nd S-NSSAI AMF entity is that terminal device 202 provides service by the 3rd AMF entity of " most suitable ".Although in the first PLMN as a result, One AMF entity does not support the first S-NSSAI, twoth PLMN of the corresponding business of the first S-NSSAI after terminal device 202 is mobile It still inside is able to be implemented.3rd AMF entity gets the context comprising instruction information, and instruction information is sent to PCF Equipment simultaneously requests the update of PCF equipment to be related to the NSSP of the 2nd S-NSSAI.Updated NSSP restores interior to " true " as a result, Hold.Subsequent, terminal device 202 can be according to updated NSSP associated application and S-NSSAI, to obtain complete business.By This, the corresponding business of the NSSAI that terminal device 202 is requested can meet, and improve the business experience of user.

Fig. 6 shows a kind of slice selection method according to an embodiment of the present invention.This method can be by the first access and movement Property management function entity (for example, above-mentioned first AMF entity) execute.Fig. 6 will be described in conjunction with Fig. 3 to Fig. 5.For example, the party Method includes:

Step 602, the first access and mobile management function to ps domain entity are from terminal device (for example, above-mentioned terminal device 202) Login request message is received, login request message includes the corresponding NSSAI of slice of premises equipment requests access.Request access Corresponding NSSAI is sliced including at least the first S-NSSAI (for example, above-mentioned S-NSSAI 2), wherein the first S-NSSAI is first The S-NSSAI that access and mobile management function to ps domain entity are not supported.

For example, step 602 can refer to the description of the step 301 in Fig. 3.

Step 604, the first access and mobile management function to ps domain entity obtain the attribute information of the first S-NSSAI, according to category Property information, for terminal device provide the first S-NSSAI using the corresponding slice of the 2nd S-NSSAI (for example, above-mentioned S-NSSAI 3) Corresponding business.

For example, step 604 can refer to the description of step 302 in Fig. 3 and 303.

Step 606, the first access and mobile management function to ps domain entity obtain NSSP (for example, above-mentioned first NSSP), NSSP Including the association between application and the 2nd S-NSSAI.

For example, step 606 can refer to the description of the step 306 in Fig. 3.

Step 608, the first access and mobile management function to ps domain entity are sent to terminal device registers received message, and registration connects Included the slice corresponding NSSAI and NSSP that terminal device allows to access by message, allows the corresponding NSSAI packet of slice accessed Include the 2nd S-NSSAI.

For example, step 606 can refer to the description of the step 307 in Fig. 3.

According to the slice selection method of the embodiment of the present application, the first AMF entity obtains attribute information, when the first AMF entity When not supporting a S-NSSAI, the first S- is provided for terminal device using the corresponding slice of the 2nd S-NSSAI according to attribute information The corresponding business of NSSAI.The not supported corresponding business of the first S-NSSAI will not be abandoned as a result, but by the 2nd S- The corresponding slice of NSSAI is on behalf of offer.In addition, the NSSP into NSSP that the first access and mobile management function to ps domain entity obtain Rule is associated with the 2nd S-NSSAI.Therefore, after terminal device receives NSSP rule, the corresponding industry of the first S-NSSAI can be perceived Business is by the corresponding slice of the 2nd S-NSSAI on behalf of offer.The corresponding business of the NSSAI of premises equipment requests can as a result, Meet, improves the business experience of user.

Optionally, this method further include: the first access and mobile management function to ps domain entity are in the context of terminal device Addition instruction information, it is corresponding using the 2nd S-NSSAI that instruction information is used to indicate the first access and mobile management function to ps domain entity Slice provide the corresponding business of the first S-NSSAI (for example, the description that can refer to step 304 in Fig. 3) for terminal device.Cause This, by the transmitting of context, other accesses and mobile management function to ps domain entity would know that above-mentioned instruction information, so that judgement should Whether access and mobile management function to ps domain entity are suitable for terminal device service, to improve the business experience of user.

Optionally, step 604 includes: the first access and mobile management function to ps domain entity from user data management equipment (example Such as, above-mentioned UDM equipment 212) or policy control functions equipment (for example, above-mentioned PCF equipment 214) obtain the first S-NSSAI category Property information (for example, the description that can refer to step 302a, 302b in Fig. 3).

Optionally, step 606 includes: the first access and mobile management function to ps domain entity to policy control functions equipment (example Such as, above-mentioned PCF equipment 214) above-mentioned instruction information is sent, the update of request strategy control function equipment is related to the first S-NSSAI's NSSP.Wherein, instruction information is used to indicate the first access and mobile management function to ps domain entity and cuts using the 2nd S-NSSAI is corresponding Piece provides the corresponding business of the first S-NSSAI for terminal device；First access and mobile management function to ps domain entity are from policy control Function device receives NSSP (for example, the description that can refer to step 305 in Fig. 3).

Optionally, this method further include: the first access and mobile management function to ps domain entity access and mobility pipe from second It manages functional entity (for example, above-mentioned 2nd AMF entity) and receives request message, with the context of requesting terminal equipment；First access The context of terminal device, context are sent to the second access and mobile management function to ps domain entity with mobile management function to ps domain entity Including above-mentioned instruction information (for example, the description that can refer to step 504 in Fig. 5).Therefore, according to the scheme of the application, work as terminal After equipment is mobile, context from the 2nd AMF entity to the first AMF entity requests terminal device before movement, to know second AMF entity is not most suitable AMF entity, and terminal device is redirected to the 3rd AMF entity for supporting the first S-NSSAI, Service is provided by the 3rd AMF entity of " most suitable " for terminal device.Although the first AMF entity in the first PLMN is not as a result, Support the first S-NSSAI, the corresponding business of the first S-NSSAI still is able in the 2nd PLMN after terminal device is mobile by reality It is existing.The corresponding business of the NSSAI of premises equipment requests can meet as a result, improve the business experience of user.

Fig. 7 shows a kind of slice selection method according to an embodiment of the present invention.This method can be by the second access and movement Property management function entity (for example, above-mentioned 2nd AMF entity) execute.Fig. 7 will be described in conjunction with Fig. 5.For example, this method packet It includes:

Step 702, the second access and mobile management function to ps domain entity receive login request message, and login request message includes The temporary identifier (for example, above-mentioned old temporary identifier) of slice corresponding NSSAI and terminal device that terminal device allows to access, The corresponding NSSAI of slice for allowing to access includes the 2nd S-NSSAI (for example, above-mentioned S-NSSAI 3).

For example, step 702 can refer to the description of the step 503 in Fig. 5.

Step 704, the second access and mobile management function to ps domain entity are according to temporary identifier, from the first access and mobility pipe The context that functional entity (for example, above-mentioned first AMF entity) obtains terminal device is managed, context includes instruction information.Instruction Information is used to indicate the first access and mobile management function to ps domain entity and is mentioned using the corresponding slice of the 2nd S-NSSAI for terminal device For the corresponding business of the first S-NSSAI (for example, above-mentioned S-NSSAI 2).

For example, step 704 can refer to the description of the step 504 in Fig. 5.

Step 706, if the second access and mobile management function to ps domain entity do not support the first S-NSSAI, the second access and shifting Terminal device is redirected to by mobility management functional entity supports the third access of the first S-NSSAI and mobile management function to ps domain real Body (for example, above-mentioned 3rd AMF entity).

For example, step 706 can refer to the description of the step 505 in Fig. 5.

According to the scheme of the application, after terminal device is mobile, the 2nd AMF entity is asked to the first AMF entity before movement The context of terminal device is sought, to know that the 2nd AMF entity is not most suitable AMF entity, if terminal device is currently visited There are access and mobile management function to ps domain entity (such as the 3rd AMF that other can support the first S-NSSAI in the PLMN network asked Entity), then terminal device is redirected to the 3rd AMF entity for supporting the first S-NSSAI, it is real by the 3rd AMF of " most suitable " Body provides service for terminal device.Although the first AMF entity in the first PLMN does not support the first S-NSSAI, the first S- as a result, The corresponding business of NSSAI still is able to be implemented in the 2nd PLMN after terminal device is mobile.Premises equipment requests as a result, The corresponding business of NSSAI can meet, and improve the business experience of user.

Optionally, this method further include: the second access and mobile management function to ps domain entity access and mobility pipe to third The context that functional entity sends terminal device is managed, context includes the instruction information (for example, can refer to step 506 in Fig. 5 Description).Therefore, instruction information can be sent to by the third access and mobile management function to ps domain entity for receiving instruction information PCF equipment simultaneously requests the update of PCF equipment to be related to the NSSP of the 2nd S-NSSAI.Updated NSSP restores to " true " as a result, Content.Subsequent, terminal device can be according to updated NSSP associated application and S-NSSAI, to obtain complete business.By This, the corresponding business of the NSSAI of premises equipment requests can meet, and improve the business experience of user.

Fig. 8 shows a kind of slice selection method according to an embodiment of the present invention.This method can be accessed by third and movement Property management function entity (for example, above-mentioned 3rd AMF entity) execute.Fig. 8 will be described in conjunction with Fig. 5.For example, this method packet It includes:

Step 802, third access and mobile management function to ps domain entity obtain the context of terminal device, and context includes referring to Show information.Instruction information is used to indicate the first access and mobile management function to ps domain entity (for example, above-mentioned first AMF entity) uses 2nd S-NSSAI (for example, above-mentioned S-NSSAI 3) it is corresponding slice for the terminal device provide the first S-NSSAI (for example, Above-mentioned S-NSSAI 2) corresponding business.

For example, step 802 can refer to the description of the step 506 in Fig. 5.

Step 804, third is accessed with mobile management function to ps domain entity to policy control functions equipment (for example, above-mentioned PCF is set Standby 214) to send instruction information, the update of request strategy control function equipment is related to the NSSP of the 2nd S-NSSAI.Updated NSSP (for example, above-mentioned 2nd NSSP) includes the association applied between the first S-NSSAI.

For example, step 804 can refer to the description of step 506 in Fig. 5 and 507.

Step 806, third access and mobile management function to ps domain entity receive updated from policy control functions equipment NSSP。

For example, step 806 can refer to the description of the step 507 in Fig. 5.

It is mentioned according to the scheme of the application after terminal device is mobile by the 3rd AMF entity of " most suitable " for terminal device For service.3rd AMF entity gets the context comprising instruction information, and instruction information is sent to PCF equipment and is requested The update of PCF equipment is related to the NSSP of the 2nd S-NSSAI.Updated NSSP restores to the content of " true " as a result,.It is subsequent, eventually End equipment can be according to updated NSSP associated application and S-NSSAI, to obtain complete business.Terminal device is asked as a result, The corresponding business of the NSSAI asked can meet, and improve the business experience of user.

Fig. 9 shows a kind of slice selection method according to an embodiment of the present invention.This method can be set by policy control functions Standby (for example, above-mentioned PCF equipment 214) executes.Fig. 9 will be described in conjunction with Fig. 3 to Fig. 5.For example, this method comprises:

Step 902, policy control functions equipment is from the first access and mobile management function to ps domain entity (for example, above-mentioned first AMF entity) receive instruction information.Instruction information is used to indicate the first access and mobile management function to ps domain entity and uses the 2nd S- The corresponding slice of NSSAI (for example, above-mentioned S-NSSAI 3) provides the first S-NSSAI (for example, above-mentioned S-NSSAI for terminal device 2) corresponding business.

For example, step 902 can refer to the description of step 305 in Fig. 3.

Step 904, policy control functions equipment is according to instruction information, and update is related to the NSSP of the first S-NSSAI, to first Access and mobile management function to ps domain entity send updated first NSSP.Wherein, updated first NSSP is (for example, above-mentioned First NSSP) it include the association applied between the 2nd S-NSSAI.

For example, step 904 can refer to the description of step 306 in Fig. 3.

According to the scheme of the application, when the first AMF entity does not support the first S-NSSAI and is corresponded to using the 2nd S-NSSAI Slice when providing the corresponding business of the first S-NSSAI for terminal device, PCF equipment will be related to the NSSP of the first S-NSSAI into Row updates, so that updated NSSP includes the association applied between the 2nd S-NSSAI.The first not supported S- as a result, The corresponding business of NSSAI will not be abandoned, but by the corresponding slice of the 2nd S-NSSAI on behalf of offer.And pass through PCF equipment pair The update of NSSP, terminal device, which can perceive the corresponding business of the first S-NSSAI, to be replaced by the corresponding slice of the 2nd S-NSSAI It provides.The corresponding business of the NSSAI of premises equipment requests can meet, and improve the business experience of user.

Optionally, this method further include: policy control functions equipment is accessed from third and mobile management function to ps domain entity (example Such as, above-mentioned 3rd AMF entity) receive the instruction information；Policy control functions equipment is related to described according to instruction information, update The NSSP of 2nd S-NSSAI, updated 2nd NSSP (for example, above-mentioned 2nd NSSP) include application and the first S-NSSAI it Between association；Policy control functions equipment sends described updated second to third access and mobile management function to ps domain entity NSSP。

Therefore, after terminal device is mobile, service is provided for terminal device by the 3rd AMF entity of " most suitable ".Third AMF entity will indicate that information is sent to PCF equipment and the update of PCF equipment is requested to be related to the NSSP of the 2nd S-NSSAI.As a result, more NSSP after new restores to the content of " true ".Subsequent, terminal device can be according to updated NSSP associated application and S- NSSAI, to obtain complete business.The corresponding business of the NSSAI of premises equipment requests can meet as a result, improve use The business experience at family.

In addition, present invention also provides another kinds to be sliced selection method.This method can be by terminal device (for example, above-mentioned end End equipment 202) it executes.As shown in Figure 10, this method comprises:

Step 1001, terminal device judges whether the current location of terminal device is corresponding in the first S-NSSAI according to NSSP First slice coverage in.Wherein, which includes the pass between the coverage of the slice of the first S-NSSAI and first Connection.

In the present embodiment, the NSSP stored in terminal device, compared with the existing technology in NSSP, increase a dimension Degree: the coverage (serving area) of the corresponding slice of S-NSSAI.In other words, in the present embodiment, NSSP includes one Item or a plurality of NSSP rule, every NSSP rule by the coverage of application, S-NSSAI and the corresponding slice of S-NSSAI into Row association.Wherein, coverage can be some band of position, for example, can pass through tracking area list (tracking area List, TA list) identify some band of position.In addition, coverage is also possible to the region of the whole network covering (for example, all PLMN, all PLMN).The whole network covering indicates no matter terminal device wherein, is all located at the service of the corresponding slice of the S-NSSAI Within region.

For example, the NSSP stored in terminal device is as shown in table 4:

NSSP rule 1	Using A	S-NSSAI-2	Coverage 2
				NSSP rule 2	Using B	S-NSSAI-2	Coverage 2
NSSP rule 3	Using C	S-NSSAI-3	Coverage 2,3
				NSSP rule 4	Using D	S-NSSAI-4	Coverage 2,3

Table 4

First S-NSSAI is that terminal device wants the S-NSSAI for including in the NSSAI requested.Disappear sending registration request Before breath, terminal device judges whether the current location of terminal device cuts in the first S-NSSAI corresponding first first according to NSSP In the coverage of piece.

In conjunction with the example of table 4, terminal device is wanted to include S-NSSAI 2 in the NSSAI of request, and 3,4, and terminal device is worked as Preceding position is in coverage 3.Before sending login request message, terminal device knows that terminal is set according to the NSSP of table 4 It is standby in the coverage of S-NSSAI 3,4, but not in the coverage of S-NSSAI 2.Therefore, 202, terminal device To network request S-NSSAI 3,4 corresponding business, not to the corresponding business of network request S-NSSAI 2.

In addition, terminal device can also judge whether be deployed with S- in PLMN that terminal device is currently located according to NSSP The corresponding slice of NSSAI.If being deployed with the corresponding slice of S-NSSAI in the PLMN being currently located, then judge terminal device Whether current location is located in the coverage of the slice.For example, terminal device is wanted also to include S- in the NSSAI of request NSSAI 5.As known from Table 4, since, without the deployment corresponding slice of S-NSSAI 5, terminal device is not also to network in the PLMN Request the corresponding business of S-NSSAI 5.

For another angle, if the current location of terminal device is located in the coverage of first slice, that is said Corresponding first slice of the first S-NSSAI is deployed in the PLMN that bright terminal device is currently located.

Step 1002, when the current location of terminal device is in the coverage of the first slice, terminal device sends registration Request message.Login request message carries the first S-NSSAI.First S-NSSAI is for selecting the first slice.

In conjunction with above example, terminal device is in the coverage of S-NSSAI 3,4, but not S-NSSAI's 2 In coverage.Therefore, the NSSAI in login request message includes S-NSSAI 3,4, does not include S-NSSAI 2.That is, first S-NSSAI is S-NSSAI 3 or 4.

For example, selecting to support S- in the region after the access network equipment in coverage 3 receives login request message The AMF entity i of NSSAI 3,4.Hereafter, other steps in register flow path are continued to execute, until register flow path terminates, the present invention It is not described herein.

Therefore, according to the slice selection method of the embodiment of the present application, before terminal device initiates registration request, first judgement is eventually Whether the current location of end equipment is in the coverage of the corresponding slice of the first S-NSSAI in the NSSAI of request.Only work as end The current location of end equipment just includes in the NSSAI of login request message the first S-NSSAI in service area.It keeps away as a result, Exempt from the registration request that core net refuses terminal device because that can not support the S-NSSAI of premises equipment requests, saves end Signalling exchange between end equipment and core net.

Optionally, after terminal device is moved to coverage 2 from coverage 3, terminal device can initiate periodicity Registration request.Before sending login request message, terminal device still passes through step 1003, first judges the current of terminal device Whether position is in the coverage of the corresponding slice of each S-NSSAI of request.

For example, the S-NSSAI 2 for including in the NSSAI of the desired request of terminal device, 3,4, and the position that terminal device is current It sets and has been moved into coverage 2.Before sending login request message, terminal device knows that terminal is set according to the NSSP of table 4 For in the coverage of S-NSSAI 2,3,4.Therefore, in step 1004, terminal device 202 sends registration request to network Message requests S-NSSAI 2,3,4 corresponding business.After access network equipment in coverage 3 receives login request message, nothing Method be connected to before be terminal device service AMF entity i, and then according to the S-NSSAI of request 2,3,4, select in the region Support the AMF entity ii of S-NSSAI 2,3,4.Hereafter, other steps in register flow path are continued to execute, until register flow path knot Beam, the present invention are not described herein.

That is, whether above-mentioned terminal device judges the current location of terminal device in the first S-NSSAI according to NSSP Step in the coverage of corresponding first slice, comprising: terminal device periodically judges the current of the terminal device Whether the corresponding base station in position is in the coverage of first slice.Therefore, if terminal device is in the position at the first moment In the coverage of the corresponding slice of the first S-NSSAI not in the NSSAI of request, when terminal device is at subsequent second moment It, still can be in the coverage for determining the corresponding slice of the first S-NSSAI of the position of terminal device in the NSSAI of request New registration request is initiated, to obtain corresponding business.

In above-mentioned embodiment provided by the present application, respectively from each network element itself and between each network element interaction Angle is described each scheme such as short message transmission method provided by the embodiments of the present application.It is understood that each net In order to realize the above functions, it comprises execute each corresponding hardware of function for member, such as above-mentioned conversation management functional entity etc. Structure and/or software module.Those skilled in the art should be readily appreciated that, describe in conjunction with the embodiments described herein Each exemplary unit and algorithm steps, the application can realize with the combining form of hardware or hardware and computer software. Some function is executed in a manner of hardware or computer software driving hardware actually, specific application depending on technical solution And design constraint.Professional technician can realize described function using distinct methods to each specific application Can, but this realization is it is not considered that exceed scope of the present application.

For example, when said network element realizes corresponding function by software module.Access and mobile management function to ps domain entity It may include receiving module 1101, processing module 1102 and sending module 1103, as shown in Figure 11 A.

In one embodiment, the access and mobile management function to ps domain entity can be used for executing in above-mentioned Fig. 3, Fig. 5, Fig. 6 The operation of first access and mobile management function to ps domain entity (for example, the first AMF entity).Such as:

Receiving module 1101 is used to receive login request message from terminal device, and the login request message includes the end The slice corresponding NSSAI, the corresponding NSSAI of slice of the request access of end equipment request access include at least the first list S- NSSAI, wherein the first S-NSSAI is first access and the S-NSSAI that mobile management function to ps domain entity is not supported； For obtaining the attribute information of the first S-NSSAI.Processing module 1102 is used to use the 2nd S- according to the attribute information The corresponding slice of NSSAI provides the corresponding business of the first S-NSSAI for the terminal device.Receiving module 1101 is also used It is sliced selection strategy NSSP in obtaining network, the NSSP includes the association applied between the 2nd S-NSSAI.Send mould Block 1103 is used to send registration received message to the terminal device, and the registration received message includes that the terminal device allows The slice of access corresponding NSSAI and the NSSP, the corresponding NSSAI of slice for allowing access includes the 2nd S- NSSAI。

The not supported corresponding business of the first S-NSSAI will not be abandoned as a result, but corresponding by the 2nd S-NSSAI Slice on behalf of offer.The corresponding business of the NSSAI of premises equipment requests can meet, and improve the business experience of user.

Optionally, processing module 1102 is also used to add instruction information, the finger in the context of the terminal device Show that information is used to indicate first access with mobile management function to ps domain entity and is using corresponding be sliced of the 2nd S-NSSAI The terminal device provides the corresponding business of the first S-NSSAI.

Optionally, receiving module 1101 is used to obtain described the from user data management equipment or policy control functions equipment The attribute information of one S-NSSAI.

Optionally, sending module 1103 is also used to send instruction information to policy control functions equipment, requests the strategy The update of control function equipment is related to the NSSP of the first S-NSSAI, wherein the instruction information is used to indicate described first and connects Enter and provides described first using corresponding be sliced of the 2nd S-NSSAI with mobile management function to ps domain entity for the terminal device The corresponding business of S-NSSAI；Receiving module 1101 is used to receive the NSSP from the policy control functions equipment.

Optionally, receiving module 1101 is also used to receive request message from the second access and mobile management function to ps domain entity, To request the context of the terminal device；Sending module 1103 is also used to real to second access and mobile management function to ps domain Body sends the context of the terminal device, and the context includes the instruction information.

In addition, the first access and receiving module 1101, processing module 1102 and transmission in mobile management function to ps domain entity Module 1103 can also be achieved other operations or function of the first AMF entity in the above method, and details are not described herein again.

In another embodiment, the access and mobile management function to ps domain entity can be used for executing in above-mentioned Fig. 5, Fig. 7 The operation of two accesses and mobile management function to ps domain entity (for example, the 2nd AMF entity).Such as:

For receiving module 1101 for receiving login request message, the login request message includes that terminal device allows to access Slice corresponding network slice selection auxiliary information NSSAI and the terminal device temporary identifier, it is described to allow to access Being sliced corresponding NSSAI includes second single network slice selection auxiliary information S-NSSAI；For according to the temporary identifier, from First access and mobile management function to ps domain entity obtain the context of the terminal device, and the context includes instruction information, It is corresponding using the 2nd S-NSSAI with mobile management function to ps domain entity that the instruction information is used to indicate first access Slice provides the corresponding business of the first S-NSSAI for the terminal device.If second access and mobile management function to ps domain are real Body does not support the first S-NSSAI, and processing module 1102, which is used to for the terminal device being redirected to, supports the first S- The third access of NSSAI and mobile management function to ps domain entity.

Therefore, after terminal device is mobile, the 2nd AMF entity is to the first AMF entity requests terminal device before movement Context, to know that the 2nd AMF entity is not most suitable AMF entity, if the PLMN network of terminal device current accessed Middle there are access and mobile management function to ps domain entities (e.g., the 3rd AMF entity) that other can support the first S-NSSAI, then will Terminal device is redirected to the 3rd AMF entity for supporting the first S-NSSAI, is set by the 3rd AMF entity of " most suitable " for terminal Standby offer service.Although the first AMF entity in the first PLMN does not support the first S-NSSAI, the first S-NSSAI corresponding as a result, Business still be able to be implemented in the 2nd PLMN after terminal device is mobile.The NSSAI of premises equipment requests is corresponding as a result, Business can meet, improve the business experience of user.

Optionally, sending module 1103 is used to send the terminal to third access and mobile management function to ps domain entity The context of equipment, the context include the instruction information.

In addition, the second access and receiving module 1101, processing module 1102 and transmission in mobile management function to ps domain entity Module 1103 can also be achieved other operations or function of the 2nd AMF entity in the above method, and details are not described herein again.

In yet another embodiment, the access and mobile management function to ps domain entity can be used for executing in above-mentioned Fig. 5, Fig. 8 The operation of three accesses and mobile management function to ps domain entity (for example, the 3rd AMF entity).Such as:

Receiving module 1101 is used to obtain the context of terminal device, and the context includes instruction information, the instruction Information is used to indicate the first access and mobile management function to ps domain entity and uses second single network slice selection auxiliary information S-NSSAI Corresponding slice provides the corresponding business of the first S-NSSAI for the terminal device.Sending module 1103 is used for policy control Function device sends the instruction information, and the policy control functions equipment update is requested to be related to the net of the 2nd S-NSSAI Network is sliced selection strategy NSSP, and updated NSSP includes the association applied between the first S-NSSAI.Receiving module 1101 are also used to receive the updated NSSP from the policy control functions equipment.

Therefore, after terminal device is mobile, service is provided for terminal device by the 3rd AMF entity of " most suitable ".Third AMF entity gets the context comprising instruction information, and instruction information is sent to PCF equipment and PCF equipment is requested to update It is related to the NSSP of the 2nd S-NSSAI.Updated NSSP restores to the content of " true " as a result,.Subsequent, terminal device can basis Updated NSSP associated application and S-NSSAI, to obtain complete business.The NSSAI of premises equipment requests is corresponding as a result, Business can meet, improve the business experience of user.

In addition, third access and receiving module 1101, processing module 1102 and transmission in mobile management function to ps domain entity Module 1103 can also be achieved other operations or function of the 3rd AMF entity in the above method, and details are not described herein again.

Figure 11 B shows the alternatively possible of access and mobile management function to ps domain entity involved in above-described embodiment Structural schematic diagram.Access and mobile management function to ps domain entity include transceiver 1104 and processor 1105, as shown in Figure 11 B.Example Such as, processor 1105 is configured as processing access and mobile management function to ps domain entity executes the first AMF entity, the in the above method Two AMF entities or the 3rd corresponding function of AMF entity.Transceiver 1104 for realizing the first AMF entity, the 2nd AMF entity, Or the 3rd AMF entity with other access and mobile management function to ps domain entity/policy control functions equipment/user data management set Communication between standby/access network equipment.The access and mobile management function to ps domain entity can also include memory 1106, described Memory saves access and the necessary program instruction of mobile management function to ps domain entity and data for coupling with processor.

Policy control functions equipment may include receiving module 1201, processing module 1202 and sending module 1203, such as Figure 12 A It is shown.The policy control functions equipment can be used for executing in above-mentioned Fig. 3, Fig. 5, Fig. 9 policy control functions equipment (for example, PCF is set Standby operation 214).Such as:

Receiving module 1201 is used to receive instruction information, the instruction letter from the first access and mobile management function to ps domain entity Breath is used to indicate first access and mobile management function to ps domain entity and uses second single network slice selection auxiliary information S- The corresponding slice of NSSAI provides the corresponding business of the first S-NSSAI for the terminal device.Processing module 1202 is used for root According to the instruction information, updates and be related to network slice the selection strategy NSSP, updated first NSSP of the first S-NSSAI Including the association between application and the 2nd S-NSSAI.Sending module 1203 is used for first access and mobility pipe It manages functional entity and sends updated first NSSP.

As a result, when the first AMF entity does not support the first S-NSSAI and the use of the corresponding slice of the 2nd S-NSSAI is terminal When equipment provides the first S-NSSAI corresponding business, the NSSP for being related to the first S-NSSAI is updated by PCF equipment, so that more NSSP after new includes the association applied between the 2nd S-NSSAI.The not supported corresponding industry of the first S-NSSAI as a result, Business will not be abandoned, but by the corresponding slice of the 2nd S-NSSAI on behalf of offer.And the update by PCF equipment to NSSP, eventually It is to replace providing by the corresponding slice of the 2nd S-NSSAI that end equipment, which can perceive the corresponding business of the first S-NSSAI,.Terminal is set The corresponding business of NSSAI of standby request can meet, and improve the business experience of user.

Optionally, receiving module 1201 is also used to access from third and mobile management function to ps domain entity receives the instruction letter Breath；Processing module 1202 is also used to according to the instruction information, and update is related to the NSSP of the 2nd S-NSSAI, updated 2nd NSSP includes the association applied between the first S-NSSAI；Sending module 1203 is also used to access to the third Updated 2nd NSSP is sent with mobile management function to ps domain entity.

In addition, the receiving module 1201, processing module 1202 and sending module 1203 in policy control functions equipment may be used also Realize other operations or function of PCF equipment 214 in the above method, details are not described herein again.

Figure 12 B shows the alternatively possible structural representation of policy control functions equipment involved in above-described embodiment Figure.Policy control functions equipment includes transceiver 1204 and processor 1205, as shown in Figure 12 B.For example, processor 1205 is matched It is set to dealing strategy control function device and executes the corresponding function of PCF equipment 214 in the above method.Transceiver 1204 for realizing Communication between PCF equipment 214 and the first AMF entity or the 3rd AMF entity.Policy control functions equipment can also include storage Device 1206, the memory with processor for coupling, the necessary program instruction of conversation strategy control function equipment and data.

Terminal device may include processing module 1302 and sending module 1303, as shown in FIG. 13A.The terminal device can be used for Execute the operation of terminal device (for example, terminal device 202) in above-mentioned Figure 10.Such as:

Processing module 1302 is used to be sliced selection strategy NSSP according to network, judges that the current location of the terminal device is It is no to be sliced in the coverage that selection auxiliary information S-NSSAI corresponding first is sliced in first single network, wherein the NSSP The association between coverage being sliced including the first S-NSSAI and first.When the current location of the terminal device exists In the coverage of first slice, sending module 1303 for sending login request message, take by the login request message With the first S-NSSAI, the first S-NSSAI is for selecting first slice.

As a result, before terminal device initiates registration request, first judge the current location of terminal device whether in request In the coverage of the corresponding slice of the first S-NSSAI in NSSAI.Only when the current location of terminal device is in service area, It just include in the NSSAI of login request message the first S-NSSAI.Core net is avoided as a result, because terminal can not be supported The S-NSSAI of device request and the registration request for refusing terminal device, the signaling saved between terminal device and core net are handed over Mutually.

Optionally, processing module 1302 is for periodically judging that the corresponding base station in the current location of the terminal device is In the no coverage being sliced described first.

In addition, terminal device may also include receiving module 1301.Receiving module 1301 in terminal device, processing module 1302 and sending module 1303 can also be achieved other operations or function of terminal device 202 in the above method, details are not described herein again.

Figure 13 B shows the alternatively possible structural schematic diagram of terminal device involved in above-described embodiment.Terminal Equipment includes transceiver 1304 and processor 1305, as shown in Figure 13 B.It is set for example, processor 1305 is configured as processing terminal It is standby to execute the corresponding function of terminal device 202 in the above method.Transceiver 1304 is for realizing terminal device 202 and access and moves Communication between mobility management functional entity/access network equipment.The terminal device can also include memory 1306, described to deposit Reservoir saves the necessary program instruction of terminal device and data for coupling with processor.

It is designed it is understood that Figure 11 B, Figure 12 B, Figure 13 B illustrate only simplifying for above equipment.In practical application In, above-mentioned each equipment may include any number of transmitter, receiver, processor, controller, memory, communication unit Deng, and all equipment that the application may be implemented are all within the scope of protection of this application.

Controller/processor for executing the above-mentioned conversation management functional entity of the application can be central processing unit (CPU), general processor, digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) perhaps other programmable logic device, transistor logic hardware component or any combination thereof.It may be implemented Or it executes and combines various illustrative logic blocks, module and circuit described in present disclosure.The processor It can be the combination for realizing computing function, such as combined comprising one or more microprocessors, DSP and the combination of microprocessor etc. Deng.

The step of method in conjunction with described in present disclosure or algorithm can realize in a manner of hardware, can also It is realized in a manner of being to execute software instruction by processor.Software instruction can be made of corresponding software module, software mould Block can be stored on RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, In the storage medium of mobile hard disk, CD-ROM or any other form well known in the art.A kind of illustrative storage medium It is coupled to processor, to enable a processor to from the read information, and information can be written to the storage medium.When So, storage medium is also possible to the component part of processor.Pocessor and storage media can be located in ASIC.In addition, should ASIC can be located in conversation management functional entity.Certainly, pocessor and storage media can also be used as discrete assembly and be present in In conversation management functional entity.

In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program Product includes one or more computer instructions.When loading on computers and executing the computer program instructions, all or It partly generates according to process or function described in the embodiment of the present invention.The computer can be general purpose computer, dedicated meter Calculation machine, computer network or other programmable devices.The computer instruction can store in computer readable storage medium In, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the computer Instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center User's line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or Data center is transmitted.The computer readable storage medium can be any usable medium that computer can access or It is comprising data storage devices such as one or more usable mediums integrated server, data centers.The usable medium can be with It is magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid State Disk (SSD)) etc..

Above-described specific embodiment has carried out further the purpose of the application, technical scheme and beneficial effects It is described in detail, it should be understood that being not used to limit the application the foregoing is merely the specific embodiment of the application Protection scope, all any modification, equivalent substitution, improvement and etc. on the basis of the technical solution of the application, done should all Including within the scope of protection of this application.

Claims

1. a kind of slice selection method characterized by comprising

First access and mobile management function to ps domain entity receive login request message, the login request message packet from terminal device The corresponding network slice selection auxiliary information NSSAI of slice of the premises equipment requests access is included, the request access is cut The corresponding NSSAI of piece includes at least first single network slice selection auxiliary information S-NSSAI, wherein the first S-NSSAI is The S-NSSAI that first access and mobile management function to ps domain entity are not supported；

First access and mobile management function to ps domain entity obtain the attribute information of the first S-NSSAI, according to the category Property information, for the terminal device provide the corresponding industry of the first S-NSSAI using the corresponding slice of the 2nd S-NSSAI Business；

First access and mobile management function to ps domain entity obtain network and are sliced selection strategy NSSP, and the NSSP includes application Association between the 2nd S-NSSAI；

First access and mobile management function to ps domain entity send to the terminal device and register received message, and the registration connects It is included the slice corresponding NSSAI and the NSSP that the terminal device allows to access, the slice for allowing to access by message Corresponding NSSAI includes the 2nd S-NSSAI.

2. the method according to claim 1, wherein further include:

First access and mobile management function to ps domain entity add instruction information in the context of the terminal device, described Instruction information is used to indicate first access and mobile management function to ps domain entity uses the corresponding slice of the 2nd S-NSSAI The corresponding business of the first S-NSSAI is provided for the terminal device.

3. method according to claim 1 or 2, which is characterized in that first access and mobile management function to ps domain entity Obtain the attribute information of the first S-NSSAI, comprising:

First access and mobile management function to ps domain entity are obtained from user data management equipment or policy control functions equipment The attribute information of first S-NSSAI.

4. method according to any one of claims 1 to 3, which is characterized in that first access and mobile management function to ps domain Entity obtains NSSP, comprising:

First access and mobile management function to ps domain entity send to policy control functions equipment and indicate information, request the plan Slightly control function equipment update is related to the NSSP of the first S-NSSAI, wherein the instruction information is used to indicate described first Access and mobile management function to ps domain entity provide described the using corresponding be sliced of the 2nd S-NSSAI for the terminal device The corresponding business of one S-NSSAI；

First access receives the NSSP from the policy control functions equipment with mobile management function to ps domain entity.

5. according to any method of claim 2 to 4, which is characterized in that further include:

First access and mobile management function to ps domain entity receive request from the second access and mobile management function to ps domain entity and disappear Breath, to request the context of the terminal device；

First access and mobile management function to ps domain entity access to described second and send institute with mobile management function to ps domain entity The context of terminal device is stated, the context includes the instruction information.

6. a kind of slice selection method characterized by comprising

Second access and mobile management function to ps domain entity receive login request message, and the login request message includes terminal device The temporary identifier of the corresponding network slice selection auxiliary information NSSAI and the terminal device of the slice for allowing to access, it is described to permit Perhaps the corresponding NSSAI of the slice accessed includes second single network slice selection auxiliary information S-NSSAI；

Second access and mobile management function to ps domain entity are according to the temporary identifier, from the first access and mobile management function Energy entity obtains the context of the terminal device, and the context includes instruction information, and the instruction information is used to indicate institute It states the first access and mobile management function to ps domain entity and is provided using the corresponding slice of the 2nd S-NSSAI for the terminal device The corresponding business of first S-NSSAI；

If second access and mobile management function to ps domain entity do not support the first S-NSSAI, second access and shifting The terminal device is redirected to by mobility management functional entity supports the third of the first S-NSSAI to access and mobility pipe Manage functional entity.

7. according to the method described in claim 6, it is characterized by further comprising:

Second access and mobile management function to ps domain entity are accessed to the third and mobile management function to ps domain entity sends institute The context of terminal device is stated, the context includes the instruction information.

8. a kind of slice selection method characterized by comprising

Third access and mobile management function to ps domain entity obtain the context of terminal device, and the context includes instruction information, The instruction information is used to indicate the first access and mobile management function to ps domain entity and uses second single network slice selection auxiliary letter The corresponding slice of breath S-NSSAI provides the corresponding business of the first S-NSSAI for the terminal device；

The third access and mobile management function to ps domain entity request institute to the policy control functions equipment transmission instruction information It states policy control functions equipment and updates and be related to network slice the selection strategy NSSP, updated NSSP of the 2nd S-NSSAI Including the association between application and the first S-NSSAI；

The third access and mobile management function to ps domain entity receive described updated from the policy control functions equipment NSSP。

9. a kind of slice selection method characterized by comprising

Policy control functions equipment receives instruction information from the first access and mobile management function to ps domain entity, and the instruction information is used S-NSSAI pairs of auxiliary information of selection is sliced using second single network in instruction first access and mobile management function to ps domain entity The slice answered provides the corresponding business of the first S-NSSAI for the terminal device；

The policy control functions equipment updates according to the instruction information and is related to the network slice choosing of the first S-NSSAI Tactful NSSP is selected, updated first NSSP includes the association applied between the 2nd S-NSSAI；

The policy control functions equipment sends described updated the to first access and mobile management function to ps domain entity One NSSP.

10. according to the method described in claim 9, it is characterized by further comprising:

The policy control functions equipment receives the instruction information from third access and mobile management function to ps domain entity；

The policy control functions equipment is according to the instruction information, and update is related to the NSSP of the 2nd S-NSSAI, after update The 2nd NSSP include the association applied between the first S-NSSAI；

The policy control functions equipment sends described updated the to third access and mobile management function to ps domain entity Two NSSP.

11. a kind of slice selection method characterized by comprising

Whether terminal device is sliced selection strategy NSSP according to network, judge the current location of the terminal device in first single net In the coverage of corresponding first slice of network slice selection auxiliary information S-NSSAI, wherein the NSSP includes described first Association between the coverage of the slice of S-NSSAI and first；

When the current location of the terminal device is in the coverage of first slice, the terminal device sends registration and asks Message is sought, the login request message carries the first S-NSSAI, and the first S-NSSAI is for selecting described first to cut Piece.

12. according to the method for claim 11, which is characterized in that the terminal device is sliced selection strategy according to network NSSP judges whether the current location of the terminal device is corresponding in first single network slice selection auxiliary information S-NSSAI In the coverage of first slice, comprising:

The terminal device periodically judges whether the corresponding base station in the current location of the terminal device cuts described first In the coverage of piece.

13. a kind of access and mobile management function to ps domain entity characterized by comprising

Receiving module, for receiving login request message from terminal device, the login request message includes the terminal device The corresponding network slice selection auxiliary information NSSAI of the slice of access is requested, the corresponding NSSAI of slice of the request access is extremely Less include first single network slice selection auxiliary information S-NSSAI, wherein the first S-NSSAI be first access and The S-NSSAI that mobile management function to ps domain entity is not supported；For obtaining the attribute information of the first S-NSSAI；

Processing module, for being provided using the corresponding slice of the 2nd S-NSSAI for the terminal device according to the attribute information First S-NSSAI corresponding business；And

Sending module；

Wherein, it includes application and described that the receiving module, which is also used to obtain network slice selection strategy NSSP, the NSSP, Association between two S-NSSAI；The sending module is used to send registration received message to the terminal device, and the registration connects It is included the slice corresponding NSSAI and the NSSP that the terminal device allows to access, the slice for allowing to access by message Corresponding NSSAI includes the 2nd S-NSSAI.

14. access according to claim 13 and mobile management function to ps domain entity, which is characterized in that the processing module is also For the addition instruction information in the context of the terminal device, the instruction information is used to indicate first access and moves Mobility management functional entity provides the first S- using the corresponding slice of the 2nd S-NSSAI for the terminal device The corresponding business of NSSAI.

15. access described in 3 or 14 and mobile management function to ps domain entity according to claim 1, which is characterized in that the reception mould Block is used to obtain the attribute information of the first S-NSSAI from user data management equipment or policy control functions equipment.

16. 3 to the 15 any access and mobile management function to ps domain entity according to claim 1, which is characterized in that the hair It send module to be also used to send instruction information to policy control functions equipment, the policy control functions equipment update is requested to be related to institute State the NSSP of the first S-NSSAI, wherein the instruction information is used to indicate first access and mobile management function to ps domain entity The corresponding business of the first S-NSSAI is provided using the corresponding slice of the 2nd S-NSSAI for the terminal device；

The receiving module is used to receive the NSSP from the policy control functions equipment.

17. 4 to the 16 any access and mobile management function to ps domain entity according to claim 1, which is characterized in that described to connect It receives module to be also used to receive request message from the second access and mobile management function to ps domain entity, to request the upper of the terminal device Hereafter；

The sending module is also used to send the upper of the terminal device to second access and mobile management function to ps domain entity Hereafter, the context includes the instruction information.

18. a kind of access and mobile management function to ps domain entity characterized by comprising

Receiving module, for receiving login request message, the login request message includes the slice that terminal device allows to access The temporary identifier of the corresponding selection of network slice auxiliary information NSSAI and the terminal device, the slice pair for allowing to access The NSSAI answered includes second single network slice selection auxiliary information S-NSSAI；For being connect from first according to the temporary identifier Enter the context that the terminal device is obtained with mobile management function to ps domain entity, the context includes instruction information, the finger Show that information is used to indicate first access with mobile management function to ps domain entity and is using corresponding be sliced of the 2nd S-NSSAI The terminal device provides the corresponding business of the first S-NSSAI；

Processing module is used for if second access and mobile management function to ps domain entity do not support the first S-NSSAI by institute It states terminal device and is redirected to the third access for supporting the first S-NSSAI and mobile management function to ps domain entity.

19. access according to claim 18 and mobile management function to ps domain entity, which is characterized in that further include:

Sending module, for sending the context of the terminal device to third access and mobile management function to ps domain entity, The context includes the instruction information.

20. a kind of access and mobile management function to ps domain entity characterized by comprising

Receiving module, for obtaining the context of terminal device, the context includes instruction information, and the instruction information is used for The first access of instruction and mobile management function to ps domain entity select that auxiliary information S-NSSAI is corresponding to be cut using second single network slice Piece provides the corresponding business of the first S-NSSAI for the terminal device；

Sending module requests the policy control functions equipment for sending the instruction information to policy control functions equipment Network slice the selection strategy NSSP, updated NSSP that update is related to the 2nd S-NSSAI include application and described first Association between S-NSSAI；

The receiving module is also used to receive the updated NSSP from the policy control functions equipment.

21. a kind of policy control functions equipment characterized by comprising

Receiving module, for receiving instruction information from the first access and mobile management function to ps domain entity, the instruction information is used for Indicate that first access is corresponding using second single network slice selection auxiliary information S-NSSAI with mobile management function to ps domain entity Slice provide the corresponding business of the first S-NSSAI for the terminal device；

Processing module is related to the network slice selection strategy of the first S-NSSAI for updating according to the instruction information NSSP, updated first NSSP include the association applied between the 2nd S-NSSAI；

Sending module, for sending updated first NSSP to first access and mobile management function to ps domain entity.

22. policy control functions equipment according to claim 21, which is characterized in that

The receiving module is also used to access from third and mobile management function to ps domain entity receives the instruction information；

The processing module is also used to according to the instruction information, and update is related to the NSSP of the 2nd S-NSSAI, updated 2nd NSSP includes the association applied between the first S-NSSAI；

The sending module is also used to access to the third and mobile management function to ps domain entity sends described updated second NSSP。

23. a kind of terminal device characterized by comprising

Whether processing module judges the current location of the terminal device for being sliced selection strategy NSSP according to network In the coverage that one single network slice selection auxiliary information S-NSSAI corresponding first is sliced, wherein the NSSP includes institute State the association between the coverage of the slice of the first S-NSSAI and first；

Sending module, when the current location of the terminal device is in the coverage of first slice, for sending registration Request message, the login request message carry the first S-NSSAI, and the first S-NSSAI is for selecting described first Slice.

24. terminal device according to claim 23, which is characterized in that

Whether the processing module is for periodically judging the corresponding base station in the current location of the terminal device described the In the coverage of one slice.

25. a kind of access and mobile management function to ps domain entity characterized by comprising

Communication interface, for sending and receiving data；

Memory, for storing instruction；

At least one processor, for executing the described instruction in the memory, so that the access and mobile management function Can entity execute it is any in claim 1 to 15,6 or 7 or 8 as described in method.

26. a kind of policy control functions equipment characterized by comprising

Communication interface, for sending and receiving data；

Memory, for storing instruction；

At least one processor, for executing the described instruction in the memory, so that the policy control functions equipment is held Method of the row as described in claim 9 or 10.

27. a kind of terminal device characterized by comprising

Communication interface, for sending and receiving data；

Memory, for storing instruction；

At least one processor, for executing the described instruction in the memory, so that the access and mobile management function It can method of the entity execution as described in claim 11 or 12.

28. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes such as Method described in claim 1-12 any one.

29. a kind of computer program product comprising instruction, when run on a computer, so that computer executes such as right It is required that method described in 1-12 any one.

30. a kind of chip apparatus, including processor, the processor is for executing as described in claim 1-12 any one Method.