CN108684073A

CN108684073A - It is a kind of registration and session establishment method, terminal and AMF entities

Info

Publication number: CN108684073A
Application number: CN201810747416.8A
Authority: CN
Inventors: 杨皓睿; 金辉; 欧阳国威; 何岳; 窦凤辉; 李小娟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-06-19
Filing date: 2017-06-19
Publication date: 2018-10-19
Anticipated expiration: 2037-06-19
Also published as: CN108684073B

Abstract

The invention relates to a kind of registration and method, terminal and the AMF entities of session establishment.Session establishing method includes that terminal sends first message to access and mobile management function AMF entities, first message includes the first information, first network slice selection information and the second network slice selection information, the first information includes the information that protocol Data Unit PDU sessions are established in request, first network slice selection information is used for AMF entity selections the first conversation management control function SMF entities, and the second network slice selection information is used for the 2nd SMF entities of AMF entity selections；Terminal receives the second message that AMF entities are sent, and second message includes the second information, and the second information includes the information that PDU session establishments receive.During establishing PDU session establishments, AMF entities accurately determine S NSSAI, complete the foundation of PDU sessions.

Description

It is a kind of registration and session establishment method, terminal and AMF entities

The application be the applying date be on June 19th, 2017, application No. is " 201780003857.0 ", a kind of entitled " registrations And method, terminal and the AMF entities of session establishment " Chinese invention patent application divisional application.

Technical field

The invention relates to field of communication technology more particularly to a kind of registration of terminal, the method for session establishment, ends End and access and mobile management function (acess and mobility management function, AMF) entity.

Background technology

Demand with the development and user of the communication technology to communication network constantly improves, 5G communication network technologies ( Claim the 5th third-generation mobile communication technology) standardization be rapidly performed by.In 5G communication network technologies, introduces network and cut The logical concept of piece.Operator can give terminal pre-configured network slice selection strategy (network slice selection Policy, NSSP), it should be noted that terminal is referred to as user equipment (user equipment, UE).It is pre-configured NSSP is made of one or more regular (rule), one third party application of each rule associations (application, App) to single network slice selection information (single network slice selection an information, S- NSSAI).When UE is needed using some App, corresponding S-NSSAI is mapped out according to the rule of NSSP, and correspond in S-NSSAI Network slice establish protocol Data Unit ((protocol data unit, PDU) session (session).

But, it is understood that there may be UE is not preconfigured a certain access public land mobile network (visited public land Mobile network, VPLMN) NSSP the case where, when UE is roamed under the VPLMN, UE does not have the NSSP of VPLMN, nothing Method is determined establishes PDU sessions on which slice.It is also likely to be present, when UE is roamed under a certain VPLMN, UE has got this The NSSP of VPLMN, but when UE needs to use ownership place public land mobile network (home public land mobile Network, HPLMN) App when, corresponding rule is can not find in the NSSP of VPLMN, at this moment UE can not also be determined and be used S-NSSAI establish PDU sessions.

Invention content

The embodiment of the present application provides a kind of registration of terminal, the method for session establishment, terminal and AMF entities, passes through end The NSSP of VPLMN or HPLMN where end obtains determines VPLMN's or HPLMN in order to accurate during PDU session establishments S-NSSAI completes the foundation of PDU sessions.

In a first aspect, the embodiment of the present application provides a kind of register method of terminal, which includes：

Terminal sends login request message to access and mobile management function AMF entities, and login request message includes first Parameter, such as NSSP is needed to indicate information, the first parameter is for asking network to be sliced selection strategy；

Terminal receives the registration received message that AMF entities are sent, and registration received message includes network slice selection strategy, During carrying out PDU session establishments in order to subsequent terminal, terminal can be according to the NSSP's or HPLMN of current VPLMN NSSP accurately determines corresponding S-NSSAI, avoids when terminal establishes PDU sessions, and AMF entities can not find network where terminal Corresponding S-NSSAI can not complete the foundation of PDU sessions, and then can not be communicated.

Second aspect, the embodiment of the present application provide a kind of method for building up of session, and this method may include：Terminal is to connecing Enter and send first message with mobile management function AMF entities, first message includes the first information, first network slice selection information It is sliced selection information with the second network, the first information includes the information that protocol Data Unit PDU sessions are established in request, first network Slice selection information is used for AMF entity selections the first conversation management control function SMF entities, and the second network slice selection information is used In the 2nd SMF entities of AMF entity selections；In order to establish in PDU conversation procedures, AMF entities accurately determine S-NSSAI, complete At the foundation of PDU sessions.

Terminal receives the second message that AMF entities are sent, and second message includes the second information, and the second information includes PDU meetings Words establish the information received.

In one implementation, first network slice selects information to be applied for first and is accessing public land mobile network The corresponding single network slice selection auxiliary information S-NSSAI of VPLMN；Second network slice selects information to apply for first to return Belong to the corresponding S-NSSAI of public land mobile network HPLMN.

Optionally, in another implementation, first message further includes instruction information, and instruction information is used to indicate first Network slice selects information to access the single network slice selection auxiliary information S-NSSAI of public land mobile network VPLMN；Or Person, instruction information are used to indicate first network slice and select information for the S-NSSAI of Home Public Land Mobile Network VPLMN.

The third aspect, the embodiment of the present application provide a kind of method of session establishment, and this method includes：

Terminal to access with mobile network management function AMF entities send first message, first message include the first information, Network slice selection information and instruction information, the first information include the information that protocol Data Unit PDU sessions are established in request, network Slice selection information is used for AMF entity selection conversation management control function SMF entities, and instruction information is used to indicate network slice choosing It is to access the single network slice selection auxiliary information S-NSSAI of public land mobile network VPLMN, or be used to indicate to select information Network slice selects information for the S-NSSAI of Home Public Land Mobile Network HPLMN；In order to establish in PDU conversation procedures, AMF entities accurately determine S-NSSAI, complete the foundation of PDU sessions.

In a mode in the cards, network slice selects information to apply corresponding S-NSSAI for first.

Optionally, in the mode of alternatively possible realization, user equipment to access with mobile management function AMF entities Before sending first message, this method can also determine network slice selection information including terminal.

In a possible realization, terminal determines network slice selection information, including：

In the network slice selection strategy for accessing public land mobile network VPLMN, if there are first to apply corresponding S- NSSAI, then terminal determine S-NSSAI be network slice selection information；Alternatively,

In the network slice selection strategy of Home Public Land Mobile Network HPLMN, if there are first to apply corresponding S- NSSAI, then terminal determine S-NSSAI be network slice selection information.

In the embodiment of the present application, the session establishment that the method for the session establishment that second aspect provides is provided with the third aspect Method can first aspect provide register method on the basis of complete.

Fourth aspect, the embodiment of the present application provide a kind of register method, and this method may include：

Access receives the login request message that terminal is sent with mobile management function AMF entities, and login request message includes First parameter, the first parameter is for asking network to be sliced selection strategy；

AMF obtains network according to login request message and is sliced selection strategy；

AMF sends registration received message to terminal, and registration received message includes network slice selection strategy.

Using scheme provided by the embodiments of the present application, during PDU session establishments, terminal can be accurately according to current The NSSP of place VPLMN or HPLMN determine S-NSSAI, complete the foundation of PDU sessions.

Optionally, in a kind of mode in the cards, AMF entities obtain network slice selection according to login request message Strategy may include：

AMF entities send first message to policy control functions PCF entities, and first message includes the first parameter；

AMF entities receive the second message that PCF entities are sent, and second message includes network slice selection strategy.

5th aspect, the embodiment of the present application provide a kind of method of session establishment, and this method includes：Access and moving tube It manages function AMF entities and receives the first message that terminal is sent, first message includes the first information, first network slice selection information It is sliced selection information with the second network, the first information includes the information that protocol Data Unit PDU sessions are established in request；

AMF entities are sliced selection information according to first network and determine the first conversation management control function SMF entities, Yi Jigen It is sliced selection information according to the second network and determines the 2nd SMF entities；

AMF entities send second message to terminal, and second message includes the second information, and the second information is built comprising PDU sessions The vertical information received.

Using scheme provided by the embodiments of the present application, what AMF entities can be sent according to terminal includes that first network is sliced Selection information and the second network slice selection information accurately determine corresponding S-NSSAI, complete the foundation of PDU sessions.

Optionally, in a kind of mode in the cards, first network slice selects information to be applied for first and is accessing public affairs The corresponding single network slice selection auxiliary information S-NSSAI of land mobile VPLMN altogether；

Second network slice selects information to apply S-NSSAI corresponding in Home Public Land Mobile Network HPLMN for first.

Optionally, in the mode of alternatively possible realization, first message further includes instruction information, and instruction information is for referring to Show that first network slice selects information to access the single network slice selection auxiliary information S- of public land mobile network VPLMN NSSAI；Select information for the S- of Home Public Land Mobile Network HPLMN alternatively, instruction information is used to indicate first network slice NSSAI。

6th aspect, the embodiment of the present application provide a kind of method for building up of session, and this method includes：

Access with mobile management function AMF entities receive terminal send first message, first message include the first information, First network slice selection information and instruction information, the first information include the information that protocol Data Unit PDU sessions are established in request； Indicate that information is used to indicate first network slice and selects information to access the single network slice choosing of public land mobile network VPLMN Auxiliary information S-NSSAI is selected, or is used to indicate network slice and selects information for the S- of Home Public Land Mobile Network HPLMN NSSAI；

AMF determines the single network slice selection auxiliary that first network slice selects information as VPLMN according to instruction information Information S-NSSAI, or determine that first network slice selects information for the S-NSSAI of HPLMN；It is sliced selection letter according to first network Breath selects the first conversation management control function SMF entities；It is sliced selection information and the S- of VPLMN according to first network The correspondence relationship information of the S-NSSAI of NSSAI and HPLMN determines the second network slice selection information, and according to the second network Slice selection information selects the 2nd SMF entities；

AMF entities send second message to terminal, and second message includes the second information, and the second information includes that PDU sessions are built The vertical information received.

Using scheme provided by the embodiments of the present application, AMF entities are sliced selection information and instruction information according to first network S-NSSAI used in can accurately determining completes the foundation of PDU sessions.

Optionally, in a kind of possible realization, first network slice selects information to apply corresponding S- for first NSSAI。

In the embodiment of the present application, the session establishment that the method for the session establishment that the 5th aspect provides is provided with the 6th aspect Method can fourth aspect provide register method on the basis of complete.

7th aspect, the embodiment of the present application provide a kind of terminal, which includes transmission unit and receiving unit, is used for Complete method/step of first aspect.In addition, the terminal can also include processing unit and storage unit, processing unit is used for Relevant data are handled, storage unit is for storing relevant instruction and data.

Eighth aspect, the embodiment of the present application provide a kind of terminal, which includes transmission unit and receiving unit, is used for Complete method/step of any mode in the cards of second aspect or second aspect.In addition, the terminal can also include Processing unit and storage unit, processing unit is for handling relevant data, and storage unit is for storing relevant instruction sum number According to.

9th aspect, the embodiment of the present application provide a kind of terminal, which includes transmission unit, receiving unit and processing Unit, method/step of any mode in the cards for completing the third aspect or the third aspect.In addition, the terminal Can also include storage unit, for storing relevant instruction and data.

Tenth aspect, the embodiment of the present application provide a kind of access and mobile management functional entity, the access and moving tube Reason functional entity includes receiving unit, processing unit and transmission unit, for completing any of fourth aspect or fourth aspect Method/step of mode in the cards.In addition, the access can also include storage unit with mobile management functional entity, use In the relevant instruction and data of storage.

Tenth on the one hand, and the embodiment of the present application provides a kind of access and mobile management functional entity, the access and movement Management function entity includes receiving unit, processing unit and transmission unit, any for completing the 5th aspect or the 5th aspect Method/step of kind mode in the cards.In addition, the access can also include storage unit with mobile management functional entity, For storing relevant instruction and data.

12nd aspect, the embodiment of the present application provide a kind of access and mobile management functional entity, the access and movement Management function entity includes receiving unit, processing unit and transmission unit, any for completing the 6th aspect or the 6th aspect Method/step of kind mode in the cards.In addition, the access can also include storage unit with mobile management functional entity, For storing relevant instruction and data.

13rd aspect, the embodiment of the present application provide a kind of terminal, which includes：

Transmitter, for sending login request message, login request message packet to access and mobile management function AMF entities The first parameter is included, the first parameter is for asking network to be sliced selection strategy；

Receiver, the registration received message for receiving the transmission of AMF entities, registration received message include network slice choosing Strategy is selected, during carrying out PDU session establishments in order to subsequent terminal, terminal can be according to current VPLMN or HPLMN NSSP accurately determines corresponding S-NSSAI, avoids when terminal establishes PDU sessions, and AMF entities can not find network where terminal Corresponding S-NSSAI can not complete the foundation of PDU sessions, and then can not be communicated.

Fourteenth aspect, the embodiment of the present application provide a kind of terminal, which includes：

Transmitter, for sending first message to access and mobile management function AMF entities, first message includes the first letter Breath, first network slice selection information and the second network slice selection information, the first information include that protocol data device is established in request The information of PDU sessions, first network slice selection information are used for AMF entity selections the first conversation management control function SMF entities, Second network slice selection information is used for the 2nd SMF entities of AMF entity selections；

Receiver, the second message for receiving the transmission of AMF entities, second message include the second information, the second packet The information that session establishment containing PDU receives.

Using terminal provided by the embodiments of the present application, in establishing PDU conversation procedures, AMF entities can accurately determine S-NSSAI completes the foundation of PDU sessions.It avoids when terminal establishes PDU sessions, AMF entities can not find network where terminal Corresponding S-NSSAI can not complete the foundation of PDU sessions, and then can not be communicated.

Optionally, in one possible implementation, first network slice selects information to be applied for first and is accessing public affairs The corresponding single network slice selection auxiliary information S-NSSAI of land mobile VPLMN altogether；Second network slice select information for First applies S-NSSAI corresponding in Home Public Land Mobile Network HPLMN.

Optionally, in alternatively possible realization method, first message further includes instruction information, and instruction information is for referring to Show that first network slice selects information to access the single network slice selection auxiliary information S- of public land mobile network VPLMN NSSAI；Select information for the S- of Home Public Land Mobile Network HPLMN alternatively, instruction information is used to indicate first network slice NSSAI。

15th aspect, the embodiment of the present application provide a kind of terminal, which may include：

Transmitter, for sending first message to access and mobile network management function AMF entities, first message includes the One information, network slice selection information and instruction information, the first information include the letter that protocol data device PDU sessions are established in request Breath, network slice selection information are used for AMF entity selection conversation management control function SMF entities, and instruction information is used to indicate net Network slice selects information to access the single network slice selection auxiliary information S-NSSAI of public land mobile network VPLMN, or Being used to indicate network slice selects information for the S-NSSAI of Home Public Land Mobile Network HPLMN；

Receiver, the second message for receiving the transmission of AMF entities, second message include the second information, the second packet Include the information of PDU session establishments receiving.

Using terminal provided by the embodiments of the present application, during PDU session establishments, AMF entities can accurately really Determine S-NSSAI, completes the foundation of PDU sessions.It avoids when terminal establishes PDU sessions, AMF entities can not find net where terminal The corresponding S-NSSAI of network can not complete the foundation of PDU sessions, and then can not be communicated.

Optionally, in a kind of mode in the cards, network slice selects information to apply corresponding S- for first NSSAI。

Optionally, in the mode of alternatively possible realization, terminal further includes processor, for determining network slice selection Information.

Optionally, processor determines network slice selection information in a kind of mode in the cards, including：

16th aspect, the embodiment of the present application provide a kind of access and mobile management function AMF entities, the AMF entities Including：

Receiver, the login request message for receiving terminal transmission, login request message include the first parameter, the first ginseng Number is for asking network to be sliced selection strategy；

Processor is sliced selection strategy for obtaining network according to login request message；

Transmitter, for sending registration received message to terminal, registration received message includes network slice selection strategy.

It is sent to the first parameter in AMF entities by terminal, the network of network is sliced selection strategy where obtaining terminal, just When subsequently carrying out PDU session establishments, selection strategy is sliced according to network and accurately determines corresponding S-NSSAI, avoids end When PDU sessions are established at end, the corresponding S-NSSAI of network where AMF entities can not find terminal can not complete the foundation of PDU sessions, And then it can not be communicated.

Optionally, in a kind of mode in the cards, processor obtains network slice selection according to login request message Strategy, including：

Transmitter sends first message to policy control functions PCF entities, and first message includes the first parameter；

Receiver receives the second message that PCF entities are sent, and second message includes network slice selection strategy.

17th aspect provides a kind of access and mobile management function AMF entities, AMF realities in the embodiment of the present application Body includes：

Receiver, the first message for receiving terminal transmission, first message include the first information, first network slice choosing Information and the second network slice selection information are selected, the first information includes the information that protocol data device PDU sessions are established in request；

Processor determines the first conversation management control function SMF entities for being sliced selection information according to first network, with And selection information is sliced according to the second network and determines the 2nd SMF entities；

Transmitter, for sending second message to terminal, second message includes the second information, and the second information includes PDU meetings Words establish the information received.

During carrying out PDU session establishments in order to subsequent terminal, terminal can be according to current VPLMN or HPLMN NSSP accurately determines corresponding S-NSSAI, avoids when terminal establishes PDU sessions, and AMF entities can not find network where terminal Corresponding S-NSSAI can not complete the foundation of PDU sessions, and then can not be communicated.

Optionally, in one possible implementation, first network slice selects information to be applied for first and is accessing public affairs The corresponding single network slice selection auxiliary information S-NSSAI of land mobile VPLMN altogether；

In the mode of alternatively possible realization, first message further includes instruction information, and instruction information is used to indicate first Network slice selects information to access the single network slice selection auxiliary information S-NSSAI of public land mobile network VPLMN；Or Person, instruction information are used to indicate first network slice and select information for the S-NSSAI of Home Public Land Mobile Network HPLMN.

18th aspect, the embodiment of the present application provide a kind of access and mobile management function AMF entities, AMF entity packets It includes：

Receiver, the first message for receiving terminal transmission, first message include the first information, first network slice choosing Information and instruction information are selected, the first information includes the information that protocol data device PDU sessions are established in request；Instruction information is used to indicate First network slice selects information to access the single network slice selection auxiliary information S- of public land mobile network VPLMN NSSAI, or be used to indicate network slice and select information for the S-NSSAI of Home Public Land Mobile Network HPLMN；

Processor, for determining that first network slice selects information to be sliced for the single network of VPLMN according to instruction information Auxiliary information S-NSSAI is selected, or determines that first network slice selects information for the S-NSSAI of HPLMN；It is cut according to first network Piece selects information, selects the first conversation management control function SMF entities；It is sliced selection information and VPLMN according to first network The correspondence relationship information of the S-NSSAI of S-NSSAI and HPLMN determines the second network slice selection information, and according to the second net Network slice selection information selects the 2nd SMF entities；

In a kind of mode in the cards, first network slice selects information to apply corresponding S-NSSAI for first.

19th aspect, the embodiment of the present application provide a kind of computer program product including instruction, work as described instruction When running on computers, any possibility of the either side or any aspect in above-mentioned first aspect to the 6th aspect is executed Method/step of realization.

20th aspect, the embodiment of the present application provide a kind of computer readable storage medium, for storing instruction, work as institute Instruction is stated when executing on computers, executes any of the either side or any aspect in above-mentioned first aspect to the 6th aspect Kind method/step in the cards.

Description of the drawings

Fig. 1 is the network frame schematic diagram that a kind of 3GPP provided by the embodiments of the present application supports multiple network slices；

Fig. 2 is a kind of core network architecture schematic diagram of 5G communication networks provided by the embodiments of the present application；

Fig. 3 is a kind of network architecture schematic diagram of local breakout scenes provided by the embodiments of the present application；

Fig. 4 is a kind of network architecture schematic diagram of home routed scenes provided by the embodiments of the present application；

Fig. 5 is a kind of flow chart of user equipment registration provided by the embodiments of the present application；

Fig. 6 is a kind of method flow diagram of session establishment provided by the embodiments of the present application；

Fig. 7 is the method flow diagram of another session establishment provided by the embodiments of the present application；

Fig. 8 is the method flow diagram of another session establishment provided by the embodiments of the present application；

Fig. 9 is a kind of structural schematic diagram of terminal provided by the embodiments of the present application；

Figure 10 is the structural schematic diagram of another terminal provided by the embodiments of the present application；

Figure 11 is the structural schematic diagram of another terminal provided by the embodiments of the present application；

Figure 12 is the structural schematic diagram of a kind of access and mobile management functional entity provided by the embodiments of the present application；

Figure 13 is the structural schematic diagram of another access and mobile management functional entity provided by the embodiments of the present application；

Figure 14 is the structural schematic diagram of another access and mobile management functional entity provided by the embodiments of the present application；

Figure 15 is a kind of structural schematic diagram of terminal provided by the embodiments of the present application；

Figure 16 is the structural schematic diagram of another terminal provided by the embodiments of the present application；

Figure 17 is the structural schematic diagram of another terminal provided by the embodiments of the present application；

Figure 18 is the structural schematic diagram of a kind of access and mobile management functional entity provided by the embodiments of the present application；

Figure 19 is the structural schematic diagram of another access and mobile management functional entity provided by the embodiments of the present application；

Figure 20 is the structural schematic diagram of another access and mobile management functional entity provided by the embodiments of the present application.

Specific implementation mode

Below in conjunction with the attached drawing in the embodiment of the present application, the embodiment of the present application is described.

The embodiment of the present application provides a kind of registration, the method for session establishment, terminal and AMF entities, is applied to 5G and communicates Network.The logical concept of network slice and the structure of network slice are introduced in the core net of 5G communication networks.

Network slice refers to the set for the logical network functional entity for supporting specific communication service demand, mainly by means of soft Part defines network (software defined netwoek, SND) technology and virtualizes (network function with network function Virtualization, NFV) technology, realize the service of communication service customizable.Logical network functional entity mentioned herein It may include the AMF entities, SMF entities and UPF entities being mentioned below, specifically refer to the description in Fig. 2.

NFV technologies can realize bottom physical resource to the mapping of virtualization resource, structure virtual machine and load networks function (network function,NF)；SDN technologies can realize logical connection, structure carrier signaling and data flow between virtual machine Access.Network slice is final to realize wireless access network (radio acess network, RAN) and core net (core Network, CN) network functional entity between Dynamic link library, configuration business chain end to end realizes flexible networking, to Realize the service of network customizable.Operator can according to each specific communication service to capacity, covering, rate, when extend to The demand of the Key Performance Indicators such as reliability (key performance indicator, KPI) determines that network is sliced, and network is cut Piece includes network functional entity set, to provide required telecommunications service business and network capabilities service to the user, is met special Fixed market scene and demand.

It is third generation partner program (the third generation partnership as shown in Figure 1 Project, 3GPP) support the network frame schematic diagram of multiple networks slice, the main Types point that the network of 5G is sliced by 3GPP For following three categories：The network of mobile broadband service (enhanced mobile broadband, eMBB) type of enhancing is cut Piece, the network slice of magnanimity internet of things service (massive internet o thing, mIoT) type and super reliability time delay The network slice of business (ultra-reliable and low latency communications, URLLC) type, more matchmakers Body equipment etc..The network slice of mIoT types is mainly directed towards the terminal of Internet of Things, the terminal have extensive, Hypomobility and Compared with the demand of low rate.The network slice of URLLC types is mainly directed towards the terminal of car networking, and the terminal is for time delay and reliability It is more demanding.For example, the network slice that mobile phone can access eMBB types carries out high-speed downloads or viewing 4K HD videos, sensing Device equipment can access the update of the transmission and system configuration of the network slice progress small data packets of mMTC types.

Multiple communication services can be supported in order to meet same terminal, improve user experience, allow same terminal access one The technical solution of a or multiple network slices, the embodiment of the present application is applicable to the one or more network slices of a terminal access Scene.

That is, each network slice is directed to specific terminal, specific service is provided.Wherein, implement in the application In example, terminal (terminal) is referred to as user equipment (user equipment, UE), can refer to providing a user The equipment of voice and/or data connectivity has the portable equipment of wireless connecting function or is connected to radio modem Other processing equipments.Wireless terminal can be communicated through RAN with one or more core nets, and wireless terminal can be mobile Terminal, such as mobile phone (or be " honeycomb " phone) and the computer with mobile terminal device, for example, it may be portable Formula, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they exchanged with wireless access network language and/or Data.For example, personal communication service (personal communication service, PCS) phone, wireless phone, session Initiation protocol (session initiated protocol, SIP) phone, wireless local loop (wireless local Loop, WLL) it stands, the equipment such as personal digital assistant (personal digital assistant, PDA).Wireless terminal can also Referred to as system, subscriber unit (subscriber unit), subscriber station (subscriber station), movement station (mobile Station), mobile station (mobile), distant station (remote station), access point (access point), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), user equipment (user device) or user equipment (user equipment), in the embodiment of the present application It does not limit.Divided according to type of service, the present embodiments relate to UE, can be above to rate and mobility have compared with Terminal device of high demand, such as mobile phone, multimedia equipment etc. can also be the terminal of Internet of Things, can also be car networking Terminal.

One network slice is that a network is sliced example (network slice in realizing to network and disposing Instance, NSI).Multiple network slice examples may be implemented out in one network slice.

One UE can use multiple NSI, NSI that can share RAN equipment and AMF entities simultaneously, and conversation management functional (session management control function, SMF) entity and user plane functions (user plane Function, UPF) entity is the distinctive network elements of NSI, as shown in Fig. 2, Fig. 2 is a kind of 5G communications provided by the embodiments of the present application The core network architecture schematic diagram of network.

In the embodiment of the present application, AMF entities, SMF entities and UPF entities can be one or more of core net clothes Business device.

Mobile management, registration management, connection management, Lawful Interception, support transmission UE and SMF of the AMF entities with UE are real The functions such as session management (session management, SM) information, access authentication and insertion authority between body.

SMF entities have the function of session management, roaming etc..Wherein, conversation management functional, for example, session establishment, modification and Release includes the tunnel maintenance of UPF and access net (access network, AN) node (node).Roaming function may include The signaling that accounting data collection, support are authenticated/authorize with external (external) data network (data network, DN) Transmission.

UPF entities have the function of data packet by with Lawful Interception etc..

In fig. 2, a UE can use two networks to be sliced example NSI1 and NSI2 simultaneously, and NSI1 and NSI2 are shared RAN equipment and AMF entities, SMF1 entities and UPF1 entities are the distinctive network elements of NSI1, and SMF2 entities and UPF2 entities are NSI2 Distinctive network element.UPF1 entities, UPF2 entities are separately connected corresponding data network (data network) 1 and data network 2。

Wherein, UE is connect with RAN by Uu interfaces；Data between RAN and UPF1 entities, UPF2 entities pass through N3 interfaces Transmission；Signaling and data between RAN equipment and AMF entities pass through N2 interfaces；Between AMF entities and SMF1 entities, SMF2 entities Signaling and data are transmitted by N11 interfaces；Signaling between SMF1 entities and UPF1 entities and SMF1 entities and UPF1 entities It is transmitted by N4 with data.It should be noted that Uu interfaces, N2 interfaces, N3 interfaces, N11 interfaces and N4 interfaces are in a standard Definition.

When UE, which is roamed into, accesses public land mobile network VPLMN, contracted according to network decision and UE, it can be by roaming point For two kinds of scenes：Ownership place route (home routed) and local data shunting (local breakout).Its network architecture is such as Shown in Fig. 3 and Fig. 4.

Wherein, Fig. 3 is a kind of network architecture schematic diagram of local breakout scenes provided by the embodiments of the present application.Figure 4 be a kind of network architecture schematic diagram of home routed scenes provided by the embodiments of the present application.

When UE initiates the request of PDU session establishments, the S-NSSAI selection networks that AMF entities are reported according to UE first are sliced NSI, reselection network are sliced the corresponding distinctive network elements of NSI, i.e. SMF entities and UPF entities.

As shown in figure 3, the network architecture is the network architecture of local breakout scenes.In local breakout Under scape, UE roams into VPLMN, initiates the request of PDU session establishments, the AMF entities of VPLMN, abbreviation V-AMF entities, first basis The network for the S-NSSAI selections VPLMN that UE is reported is sliced V-NSI1, the corresponding distinctive network elements of reselection V-NSI1, i.e. V-SMF Entity and V-UPF entities, the process are similar with non-roaming situation.Wherein, V-SMF entities are the SMF entities of VPLMN where UE； V-UPF entities are the UPF entities of VPLMN where UE.

As shown in figure 4, the network architecture is the network architecture of home routed scenes.Under home routed scenes, UE roams into VPLMN, which uses V-NSI1, which includes V-RAN equipment and V-AMF entities and distinctive network element V-SMF1 entities and V-UPF1 entities；The UE uses H-NSI2 in ownership place, and the peculiar network element of the H-NSI2 is H-SMF2 entities With H-UPF2 entities.

When UE initiate PDU session establishments request when, V-AMF according to the S-NSSAI of VPLMN select V-SMF entities and according to The S-NSSAI of HPLMN selects H-SMF entities, and V-SMF entities and H-SMF entities select V-UPF entities and H-UPF entities respectively. Transmitting uplink data is that for equipment to V-UPF entities again to H-UPF entities, downlink is reversed from UE to RAN.

Session establishing method provided by the embodiments of the present application is illustrated below in conjunction with the accompanying drawings.Under it should be noted that The AMF entities mentioned in text each mean the V-AMF entities of VPLMN if nonspecific indicate.

When UE roams into VPLMN from ownership place, UE is needed first to carry out network registry, specific network registration process such as Fig. 5 Shown, process may comprise steps of：

S110, UE send registration request (registration request) message to AMF entities.

Login request message includes the first parameter, and the first parameter is for asking network to be sliced selection strategy.In the application In embodiment, the first parameter can be that NSSP is needed to indicate (need NSSP indication) information, for being asked to AMF entities Seek NSSP.

It can also include the mark of UE in login request message, the mark of the UE can be provisional mark, that is, for The unique marks of UE temporarily of the mark that UE is distributed temporarily, such as whole world (globally unique temporary UE identity, GUTI), in the embodiment of the present application, which can be when registering the UE last times, and AMF entities distribute to the mark of UE.

S120, AMF entity according to login request message from policy control functions (policy control function, PCF) entity obtains NSSP.

AMF entities are obtained according to the mark of the UE in login request message, such as GUTI and the first parameter from PCF entities The selection strategy NSSP of network slice.

Wherein, PCF entities are the function device of a logic, can be a server, or multiple servers, Strategy is provided for face entity in order to control or UE, that is to say, that management and control of the PCF entities for strategy.

AMF from PCF entities obtain NSSP process can be specially：As shown in figure 5, S121 and S122.

S121, AMF entity send user to policy control functions (policy control function, PCF) entity and set Standby context establishes request (UE context establishment request) message.

Customer equipment context establishes the first parameter and the mark including UE in request message.The mark of UE can be user Permanent identifier (subscriber permanent identifier, SUPI), SUPI may include international mobile subscriber identification Code (international mobile subscriber identification, IMSI)), network access Identifier (network Access identifier, NAI) etc..Wherein, the mark SUPI of UE is that the AMF entities are true according to the mark GUTI of the UE Fixed.For example, the SUPI of UE is IMSI, AMF entities are according to the mark of the UE stored in mark GUTI and the AMF entity of UE The relation information of GUTI and mark IMSI determine the mark IMSI of UE.It in other words, can according to the provisional mark GUTI of UE To find the permanent identifier IMSI of UE.

S122, AMF entity receive the user's context that PCF entities are sent and establish response (UE context Establishment response) message.

PCF entities receive the transmission of AMF entities user's context establish request message after, be UE according to the IMSI of UE The context in PCF entities is established, and NSSP indicates that information sends user's context to AMF entities and establishes response as needed Message, the user's context establish the NSSP that response message includes the SUPI and the UE of UE.

AMF entities receive after user's context establishes response message and execute step S130.

S130, AMF entity send registration to UE and receive (registration accept) message.

It includes NSSP to register received message, i.e. UE obtains the NSSP under the VPLMN currently registered.Compared with prior art, UE can obtain the NSSP of current registration VPLMN from AMF entities, rather than the NSSAI and VPLMN of HPLMN is obtained from AMF entities NSSAI mapping relations.When UE is according to the NSSP for getting VLPMN, can accurately be determined according to NSSP current The S-NSSAI that App should be used under VPLMN.

Optionally, as shown in figure 5, in the embodiment of the present application, the login request message of UE transmissions is received in AMF entities Afterwards, this method can also include：

S140, AMF entity send update position to user data management (user data management, UDM) entity (update location) information.

UDM entities can be a server, be used for the management of user data, such as location management, signing management etc..

AMF entities determine the IMSI of UE according to the GUTI of the UE in the login request message received, and are sent more to UDM New location information.UDM receives the more new location information that AMF is sent, and updates the current AMF entities of UE according to the SUPI of UE, and Update position, which is sent, to AMF entities responds (update location ack) message.

S150, AMF entity receive the update position that UDM entities are sent and receive the response.

The update position receive the response include UE signing information, for follow-up AMF provide signing information include Respective service.

When UE needs to conversate after VPLMN completes registration to be established, the step in Fig. 6, Fig. 7 and Fig. 8 is executed Suddenly：

Fig. 6 is a kind of method flow diagram of session establishment provided in an embodiment of the present invention.As shown in fig. 6, this method can be with Include the following steps：

S201, UE send first message to AMF entities.

When establishing session, UE is needed to initiate first message to AMF entities.First message includes the first information (information), first network slice selection information and the second network slice selection information.

Wherein, the first information includes the information that PDU sessions are established in request.In the embodiment of the present application, the first information can be with For a message, such as PDU session establishments request message (PDU session establishment request).

First network slice selection information is used for the first SMF entities of AMF entity selections, for example, first network slice selection Information can be the S-NSSAI of VPLMN；Second network slice selection information selects the 2nd SMF entities for AMF, for example, second Network slice, which selects information, to be the S-NSSAI of HPLMN.

Wherein, first network slice selection information and the second network slice selection information are for identifying and determining network Slice.It may each comprise the type of network slice in first network slice selection information and the second network slice selection information, Rent the information such as the trade name of network slice.

S202, AMF entity are sliced selection information according to first network and determine the first SMF entities, are sliced according to the second network Selection information determines the 2nd SMF entities.

Assuming that first network slice selects information for the S-NSSAI of VPLMN, the second network slice selects information for HPLMN S-NSSAI.After AMF entities receive the first message of UE transmissions, V-SMF entities are determined according to the S-NSSAI of VPLMN.I.e. First SMF entities determine H-SMF entities, i.e. the 2nd SMF entities according to the S-NSSAI of HPLMN.Again by V-SMF entity selections V- UPF entities, H-SMF entity selection H-UPF entities, continue the foundation of session.Second message finally is sent from AMF entities to UE, Second message includes the second information, and the second information includes that PDU session establishments receive (PDU session establishment Accept information).

S203, UE receive the second message that AMF entities are sent.

Using the method for the session establishment of the embodiment of the present application, the S-NSSAI of VPLMN is sent to AMF entities by UE, and The S-NSSAI of HPLMN can accurately determine under current VPLMN under the S-NSSAI used and HPLMN that this is used S-NSSAI to complete the foundation of PDU sessions, and then realizes the communication of UE.

Optionally, in the embodiment of the present application, first network slice selects information that can be applied in VPLMN correspondences for first S-NSSAI.Second network slice selects information that can apply S-NSSAI corresponding in HPLMN for first.

Wherein, the first application is any third party application App installed in UE, such as facebook, QQ etc..

Optionally, in the embodiment of the present application, AMF entities send second message to UE, and second message includes that PDU sessions are built The vertical information received, specifically includes：

AMF entities send PDU session establishments to RAN equipment and respond (PDU session establishment Response) message.

PDU session establishment response messages include the information that PDU session establishments receive and the first Tunnel Identifier and address letter Breath.

RAN equipment sends wireless heterogeneous networks (radio resource control, RRC) message to UE.

RRC information includes that PDU session establishments receive information, to notify UE to receive session establishment.

Optionally, in embodiments herein, as shown in fig. 6, being sliced selection information according to first network in AMF entities It determines the first SMF entities, is sliced according to the second network after selecting information to determine the 2nd SMF entities, the method further includes：

S204, AMF entity send third message to V-SMF entities.

Third message includes the address information of PDU session establishments request message and H-SMF entities.In the embodiment of the present application In, third message is properly termed as N11 message etc., in the embodiment of the present application, is not limited to the specific name of third message.

S205, V-SMF entity determine V-UPF entities according to third message, and distribute the ends V-UPF for the session established The first Tunnel Identifier and address information and the ends V-UPF the second Tunnel Identifier and address information.

Wherein, the first Tunnel Identifier and address information are RAN equipment to V-UPF used in V-UPF entity transmission datas The Tunnel Identifier at the mark and address information in the tunnel at end, i.e. uplink (RAN equipment to the V-UPF entities) tunnels N3 ends V-UPF and Address information；Second Tunnel Identifier and address information are H-UPF entities to the ends V-UPF used in V-UPF entity transmission datas Tunnel mark and address information, i.e., the Tunnel Identifier at downlink (H-UPF entities to the V-UPF entities) tunnels N9 ends V-UPF and Address information.

V-SMF entities determine V-UPF entities according to the PDU session establishment request messages in third message, distribute V-UPF's The second Tunnel Identifier and address information of first Tunnel Identifier and address information and V-UPF；V-SMF entities are to V-UPF entities It sends and creates conversation message, it includes the information such as detection and report rule to create session (create session) message.

S206, V-UPF entity receive the establishment conversation message that V-SMF entities are sent.

After V-UPF entities receive the establishment conversation message of V-SMF entities transmission, the letter created in conversation message is preserved Breath, and reply response message.

S207, V-SMF entity send establishment session request (create session request) to H-SMF entities and disappear Breath.

The establishment conversation request message includes the second Tunnel Identifier and address information, i.e. H-UPF entities to V-UPF data The Tunnel Identifier and address information at the ends V-UPF used in transmission.

Believe the address for the H-SMF entities that V-SMF entities include according to the third message that the AMF entities received are sent Breath sends to the corresponding H-SMF entities of address information of H-SMF entities and creates conversation request message.

S208, H-SMF entity determine H-UPF entities according to conversation request message is created, and send and create to H-UPF entities Conversation message.

Create conversation message include the Tunnel Identifier at the ends V-UPF used in H-UPF entities to V-UPF data transmissions with Address information, i.e. the second Tunnel Identifier and address information.

H-UPF entities receive establishment conversation message, preserve the information created in conversation message, and reply response message.

S209, H-SMF entity send to V-SMF entities and create conversational response message.

Wherein, it is uplink (V-UPF to H-UPF) N9 tunnel distributings H- that establishment conversational response message, which includes H-SMF entities, The Tunnel Identifier and address information at the ends UPF.

Wherein, the Tunnel Identifier at the ends H-UPF in the tunnel uplink (V-UPF to H-UPF) and address information may be embodied in wound It builds in conversational response (create session response) message, i.e., H-SMF entities send to V-SMF entities and create session Response message creates Tunnel Identifier and ground that conversational response message includes the ends H-UPF in the tunnel uplink (V-UPF to H-UPF) Location information.

S210, AMF entity receive the 4th message.

4th message includes that V-SMF entities send PDU session establishments receiving (PDU session to AMF entities Establishment accept) information and the first Tunnel Identifier and address information, i.e. uplink (RAN equipment to V-UPF realities Body) data send N3 tunnels the ends V-UPF Tunnel Identifier and address information.Namely the 4th message includes that (RAN is set uplink It is standby to arrive V-UPF entities) data send the tunnels N3 the ends V-UPF Tunnel Identifier and address information.

Optionally, after the second message that UE receives the transmission of AMF entities, the method further includes：

S211, RAN equipment send PDU session establishment response messages to AMF entities.

The Tunnel Identifier at the ends RAN in RAN equipment allocation of downlink (V-UPF entities to RAN equipment) tunnels transmission data N3 and Address information, and it is sent to AMF entities.

The downlink (V-UPF entities to RAN equipment) of distribution is sent number by RAN equipment by PDU session establishments response message It is sent to AMF entities according to the Tunnel Identifier and address information at the ends RAN in the tunnels N3.

S212, AMF entity send PDU session establishment response messages to V-SMF entities.

AMF entities need the V-UPF entities that will be received to the tunnel mark at the ends RAN in the tunnels RAN equipment transmission data N3 Know and address information is sent to V-SMF entities.

AMF entities are sent out V-UPF entities to RAN equipment by sending PDU session establishment response messages to V-SMF entities It send the Tunnel Identifier at the ends RAN in the tunnels data N3 and address information to be included in PDU session establishment response messages and is sent to V-SMF Entity.

S213, V-SMF entity send modification session (modify session) message to V-UPF.

The modification conversation message includes Tunnel Identifier of the V-UPF entities to the ends RAN in the tunnels RAN equipment transmission data N3 With the Tunnel Identifier and address information of address information and the ends H-UPF in the tunnels V-UPF to H-UPF transmission data N9.

S214, V-SMF entity respond V-AMF entities, and PDU session establishments are completed.

V-SMF entities respond AMF entities, to complete the foundation of PDU sessions.

In another embodiment of the application, as shown in fig. 7, the first message in S201 can also include instruction information, It is used to indicate first network and is sliced the S-NSSAI for selecting information as HPLMN；Or instruction information is used to indicate first network slice Select information for the S-NSSAI of VPLMN.

AMF entities receive UE transmission first message, according to instruction information instruction first network slice select information for The corresponding S-NSSAI of VPLMN determine that the second network is sliced the S-NSSAI for selecting information as HPLMN；Alternatively, AMF entities according to Instruction information instruction first network slice select information for the S-NSSAI of HPLMN, determine the second network be sliced select information for The S-NSSAI of VPLMN；And it is sliced according to first network and information and the second network slice selection information is selected to determine corresponding SMF Entity, that is, V-SMF entities are selected in the S-NSSAI of VPLMN according to UE, H- is selected in the S-NSSAI of HPLMN according to UE SMF entities, to complete the foundation of session, specific session establishment process is identical as method/step of S204 to S214 in Fig. 6, Succinctly to describe, details are not described herein.

Optionally, instruction information can be used for instruction the second network slice select information for the S-NSSAI of VPLMN or The S-NSSAI of HPLMN.AMF entities can determine that first network is sliced the S- for selecting information as HPLMN according to instruction information The corresponding S-NSSAI of NSSAI or VPLMN.

Using the method for session establishment provided by the embodiments of the present application, the first of the AMF entities that UE is sent to can be passed through Network slice selection information and the second network selective information, and instruction information, i.e. VPLMN corresponding S-NSSAI, S-NSSAI With the information of instruction S-NSSAI, V-SMF entities and H-SMF entities are accurately determined, further complete the foundation of session, with During avoiding UE from carrying out PDU session establishments, AMF entities can not determine the corresponding S-NSSAI of UE, can not complete PDU sessions It establishes, and then cannot achieve the communication of UE.

The method of Fig. 8 another session establishments provided by the embodiments of the present application.As shown in figure 8, this method may include with Lower step：

S301, UE send first message to AMF entities.

When session establishment, needs UE to send first message to AMF entities, cut comprising the first information, network in first message Piece selects information (i.e. first network slice selection information) and instruction information.

Wherein, the first information includes the information that PDU sessions are established in request, and in the embodiment of the present application, the first information also may be used Think a piece of news, such as PDU session establishment request messages.

First network slice selection information is used for AMF entity selection SMF entities.Instruction information is used to indicate first network and cuts It is UE in the S-NSSAI of VPLMN that piece, which selects information, or it is UE HPLMN's to be used to indicate first network slice to select information S-NSSAI。

S302, AMF entity according to instruction information determine first network slice select information for UE VPLMN S-NSSAI, Or determine first network slice select information for UE HPLMN S-NSSAI；Selection information is sliced according to first network to determine First SMF entities, and according to first network slice selection information and pair of the S-NSSAI of the S-NSSAI and HPLMN of VPLMN Relation information is answered to determine the second network slice selection information；It is sliced selection information according to the second network and selects the 2nd SMF entities.

It should be noted that the correspondence of the S-NSSAI of the S-NSSAI and HPLMN of VPLMN in the embodiment of the present application Information can roaming agreement defines according to VPLMN S-NSSAI and HPLMN S-NSSAI one-to-one relationship letter Breath, or the one-to-many relationship of the S-NSSAI of the S-NSSAI and HPLMN of the VPLMN defined according to roaming agreement are believed Breath.

For the S-NSSAI of the S-NSSAI and HPLMN of VPLMN one-to-one correspondence the case where, for example, in AMF entities in advance Store VPLMN S-NSSAI and HPLMN S-NSSAI one-to-one mapping relation table, when first network slice select information for When the S-NSSAI of VPLMN, AMF entities can determine that the S-NSSAI of HPLMN is used as the second network slice by mapping table Select information.In the case of the S-NSSAI of the S-NSSAI and HPLMN of VPLMN are one-to-many, for example, the S- of a VPLMN NSSAI corresponds to the S-NSSAI of multiple HPLMN, then when first network slice select information for the S-NSSAI of VPLMN when, AMF Entity can select one according to the sequencing of the priority of the S-NSSAI of the corresponding multiple HPLMN of S-NSSAI of VPLMN The S-NSSAI of HPLMN is corresponded to, further to complete the foundation of PDU sessions.

Optionally, AMF entities can also carry out the corresponding HPLMN's of S-NSSAI of selection VPLMN according to the attribute of session S-NSSAI.For example, going selection and session in the session attribute according to the conversation type in the session attribute of the S-NSSAI of VPLMN The S-NSSAI of the consistent HPLMN of type.

After AMF entities determine the first SMF entities and the 2nd SMF entities, the foundation of session is further completed, and send out to UE Second message is sent, includes the second information in second message, the second information includes the information that PDU session establishments receive.

S303, UE receive second message.

Using the method for the session establishment of the embodiment of the present application, S-NSSAI and instruction S- are sent to AMF entities by UE NSSAI UE VPLMN or HPLMN S-NSSAI, in order to which AMF is according to the UE message sent and the S-NSSAI of VPLMN With the correspondence relationship information of the S-NSSAI of HPLMN, V-SMF entities and H-SMF entities are accurately determined out, further completes meeting The foundation of words.

Optionally, in the embodiment of the present application, first network slice selects information to apply corresponding S-NSSAI for first. Wherein, the first application is the third party application installed in UE, such as：QQ, facebook etc..

In the embodiment of the present application, AMF entities determine the corresponding S- of VPLMN corresponding S-NSSAI and HPLMN NSSAI, V-SMF entities are selected according to the S-NSSAI of VPLMN, and H-SMF entities are selected according to the S-NSSAI of HPLMN, to complete The foundation of session, specific session establishment process S304 to S314 is identical as method/step of S204 to S214 in Fig. 6, for letter Clean description, details are not described herein.

Optionally, in the embodiment of the present application, before UE sends first message to AMF entities, this method further includes：

UE determines network slice selection information, i.e. first network slice selection information.

Its detailed process may include：In the network slice selection strategy for accessing public land mobile network VPLMN, if depositing Corresponding S-NSSAI is applied first, then UE determines that S-NSSAI is first network slice selection information；Alternatively, public belonging to In the network slice selection strategy of land mobile HPLMN, corresponding S-NSSAI, terminal is applied to determine S- if there are first NSSAI is first network slice selection information.

Described above is registration and the procedures of session establishment, and 9 to attached drawing 14 below in conjunction with the accompanying drawings, to the application The terminal and AMF that embodiment provides illustrate.It should be noted that the terminal in the embodiment of the present application is properly termed as UE.

Fig. 9 is a kind of structural schematic diagram of terminal provided by the embodiments of the present application.As shown in figure 9, the terminal may include Transmission unit 410 and receiving unit 420.

When terminal roams into access HPLMN from ownership place, terminal needs to carry out network registry, in registration process, hair Unit 410 is sent to send login request message to access and mobile management function AMF entities, login request message includes the first ginseng Number, for asking network to be sliced selection strategy.In the embodiment of the present application, the first parameter can be that NSSP is needed to indicate information.

After AMF entities receive the login request message of terminal transmission, obtained according to the first parameter in login request message Network slice selection information is taken, and registration received message is sent to terminal, wherein registration received message includes network slice choosing Information is selected, when carrying out PDU session establishments in order to terminal, selection strategy can be sliced according to network and accurately selects terminal place The S-NSSAI of VPLMN or HPLMN further completes the foundation of PDU sessions.

Optionally, in the embodiment of the present application, terminal can also include processing unit, the place for carrying out related data Reason.

Figure 10 is a kind of structural schematic diagram of terminal provided by the embodiments of the present application.As shown in Figure 10, which can wrap Include transmission unit 510 and receiving unit 520.

Transmission unit 510 is used to send first message to access and mobile management function AMF entities, and first message includes the One information, first network slice selection information and the second network slice selection information.

Wherein, the first information includes the information that protocol Data Unit PDU sessions are established in request.In the embodiment of the present application, The first information can be a message, such as PDU session establishment request messages.

First network slice selection information is used for AMF entity selections the first conversation management control function SMF entities；Second net Network slice selection information is used for the 2nd SMF entities of AMF entity selections.For example, first network slice select information for terminal (or Referred to as UE) in the S-NSSAI of VPLMN, it is terminal (or being UE) in the S-NSSAI of HPLMN that the second network slice, which selects information, Then AMF selects V-SMF entities according to the S-NSSAI of VPLMN, i.e. the first SMF entities, AMF entities are according to the S-NSSAI of HPLMN Select H-SMF entities, i.e. the 2nd SMF entities.

Receiving unit 520 is used to receive the second message of AMF entities transmission, and second message includes the second information, the second letter The information that breath receives comprising PDU session establishments.

Using terminal provided by the embodiments of the present application, terminal is sent in VPLMN and terminal to AMF entities by terminal In two S-NSSAI of HPLMN, V-SMF entities and H-SMF entities are accurately determined according to two S-NSSAI convenient for AMF, into One step completes the foundation of PDU sessions.

Optionally, in one embodiment of the application, first network slice selects information to be applied at VPLMN pairs for first The S-NSSAI answered.Second network slice selects information to apply S-NSSAI corresponding in HPLMN for first.Wherein, the first application For the third-party application installed in terminal, such as QQ, facebook etc..

Optionally, in another embodiment of the application, first message can also include instruction information, be used to indicate first Network slice selects information for the S-NSSAI of HPLMN；Or instruction information be used to indicate first network slice select information for The S-NSSAI of VPLMN.

In the embodiment of the present application, first message includes two S-NSSAI, by indicating that information indicates one of S- NSSAI is terminal in the S-NSSAI of VPLMN or is S-NSSAI of the terminal in HPLMN.AMF entities receive the first message Afterwards, according to the instruction information in first message, determine that one in two S-NSSAI confuses S-NSSAI for terminal in VPLMN, Another is S-NSSAI of the terminal in HPLMN, and selects V-SMF entities according to the S-NSSAI of VPLMN, according to the S- of HPLMN NSSAI selects H-SMF entities, further completes the foundation of PDU sessions.

In addition, the terminal of the embodiment of the present application can also include processing unit, it to be used for the relevant treatment of data.

It should be noted that in the embodiment of the present application, the terminal that Figure 10 is provided can be same with Fig. 9 terminals provided Transmission unit 510 and receiving unit 520 in one terminal, that is, Figure 10 can be transmission unit 410 and reception in Fig. 9 Unit 420.

Figure 11 is a kind of terminal provided by the embodiments of the present application.As shown in figure 11, which may include transmission unit 610 With receiving unit 620.

Transmission unit 610 is used to send first message, first message packet to access and mobile network management function AMF entities Containing the first information, network slice selection information and instruction information.

The first information includes the information that protocol Data Unit PDU sessions are established in request.In the embodiment of the present application, the first letter Breath or a piece of news, for example, the first information is PDU session establishment request messages.

Network slice selection information is used for AMF entity selection conversation management control function SMF entities.Instruction information is for referring to Show that network slice selects information and selects auxiliary information S-NSSAI to access the single network slice of public land mobile network VPLMN, Or it is used to indicate network slice and selects information for the S-NSSAI of Home Public Land Mobile Network HPLMN.

In order to AMF entities according to instruction information determine network slice select information for terminal VPLMN S-NSSAI, Or terminal HPLMN S-NSSAI, and further according to network be sliced selection information determine terminal HPLMN S- NSSAI or terminal are in the S-NSSAI of V-PLMN, and selection V-SMF entities and H-SMF entities.

Receiving unit 620 receives the second message that AMF entities are sent, and second message includes the second information, the second packet The information for including the receiving of PDU session establishments, to complete the foundation of PDU sessions.

Optionally, in the embodiment of the present application, network slice selects information to apply corresponding S-NSSAI for first.Wherein, First using the third party application, such as QQ, facebook, mailbox etc. by being installed in terminal.

Optionally, in the embodiment of the present application, terminal can also include processing unit 630, be sent to AMF entities in terminal Before first message, processing unit 630 also needs to determine network slice selection information.

For example, processing unit 630 is once handled：In the network slice selection strategy of VPLMN, to be answered if there are first With corresponding S-NSSAI, it is determined that the S-NSSAI is network slice selection information；Alternatively, the network in HPLMN is sliced selection In strategy, if there are first to apply corresponding S-NSSAI, it is determined that the S-NSSAI is network slice selection information.

It should be noted that the terminal that the terminal that Figure 11 is provided can be provided with Fig. 9 is a terminal, the transmission in Figure 11 Unit 610 and receiving unit 620 are transmission unit 410 and receiving unit 420 in Fig. 9.

Figure 12 is the structural schematic diagram of a kind of access and mobile management functional entity provided by the embodiments of the present application.Such as Figure 12 Shown, the access and mobile management function AMF entities may include receiving unit 710, processing unit 720 and transmission unit 730.

Receiving unit 710 is used to receive the login request message of terminal transmission.Login request message includes the first parameter, the One parameter is for asking network slice selection strategy NSSP.In the embodiment of the present application, the first parameter can be that NSSP is needed to refer to Show information.

Processing unit 720 is sliced selection strategy for obtaining network according to login request message.

Optionally, in one embodiment of the application, AMF entities can obtain the NSSP of the terminal to PCF entities.

For example, the transmission unit 730 of AMF entities sends UE contexts to PCF entities establishes request message, wrapped in the message Include the first parameter and the identification information of UE, such as IMSI；PCF entities send UE contexts to AMF entities according to the request of AMF and build Vertical to receive the response, which includes the identification information of the NSSP and UE of UE.

Transmission unit 730 is used to send registration received message to terminal.Registration received message includes network slice selection Strategy, during carrying out PDU session establishments in order to terminal, where ANF entities can accurately be determined according to the NSSP of terminal The S-NSSAI of VPLMN or HPLMN further completes the foundation of PDU sessions.

Figure 13 is the structural schematic diagram of a kind of access and mobile management functional entity provided by the embodiments of the present application.Such as Figure 13 Shown, the access and mobile management functional entity AMF may include receiving unit 810, processing unit 820 and transmission unit 830.

Receiving unit 810 is used to receive the first message of terminal transmission.First message is cut comprising the first information, first network Piece selects information and the second network slice selection information.

The first information includes the information that protocol Data Unit PDU sessions are established in request.In the embodiment of the present application, the first letter Breath can be a piece of news, for example, the first information is PDU session establishment request messages.

Processing unit 820, which is used to be sliced selection information according to first network, determines that the first conversation management control function SMF is real Body, and selection information is sliced according to the second network and determines the 2nd SMF entities.

For example, it is S-NSSAI of the terminal in VPLMN that first network slice, which selects information, the second network slice selects information It is terminal in the S-NSSAI of HPLMN, then AMF selects V-SMF entities, i.e. the first SMF entities, AMF according to the S-NSSAI of VPLMN Entity selects H-SMF entities, i.e. the 2nd SMF entities according to the S-NSSAI of HPLMN.

Transmission unit 830 is used to send second message to terminal.Second message includes the second information, and the second information includes The information that PDU session establishments receive, to complete the foundation of PDU sessions.

Optionally, in the embodiment of the present application, first network slice selects information to apply S- corresponding in VPLMN for first NSSAI；Second network slice selects information to apply S-NSSAI corresponding in HPLMN for first.Wherein, the first application is terminal On the third party application installed, such as mailbox, QQ, facebook etc..

Optionally, in one embodiment of the application, first message can also include instruction information, be used to indicate first Network slice selects information for the S-NSSAI of HPLMN；Or first network slice selects information for the S-NSSAI of VPLMN.AMF After entity receives the first message, according to the instruction information in first message, the first network that first message includes is determined Slice selection information and the second network slice selection information be respectively terminal VPLMN S-NSSAI or terminal HPLMN's S-NSSAI.If AMF entities determine that first network is sliced the S-NSSAI for selecting information as VPLMN according to instruction information, it is determined that Second network slice select information for the S-NSSAI of HPLMN, with according to the S-NSSAI of HPLMN selection H-SMF entities according to The S-NSSAI of VPLMN selects V-SMF entities, further completes session establishment.

It should be noted that the AMF entities that the AMF entities that Figure 13 is provided can be provided with Figure 12 are an equipment, wherein Receiving unit 810, processing unit 820 and transmission unit 830 in Figure 13 can be receiving unit 710, processing list in Figure 12 Member 720 and transmission unit 730.

Figure 14 is the structural schematic diagram of another access and mobile management functional entity provided by the embodiments of the present application.Such as figure Shown in 14, the access and mobile management function AMF entities may include receiving unit 910, processing unit 920 and transmission unit 930。

Receiving unit 910 is used to receive the first message of terminal transmission.First message is cut comprising the first information, first network Piece selects information and instruction information.

Indicate that information is used to indicate first network slice and information is selected to access public land mobile network VPLMN's for terminal Single network slice selection auxiliary information S-NSSAI, or be used to indicate network slice and select information public in ownership for terminal The S-NSSAI of land mobile HPLMN.

Processing unit 920 be used for according to instruction information determine first network slice select information for terminal VPLMN list One network slice selection auxiliary information S-NSSAI, or determine first network slice select information for terminal HPLMN S- NSSAI；It is sliced selection information according to first network, selects the first conversation management control function SMF entities；It is cut according to first network Piece selects the correspondence relationship information of the S-NSSAI of information and the S-NSSAI and HPLMN of VPLMN to determine that the second network slice selects Information is selected, and selection information is sliced according to the second network and selects the 2nd SMF entities.

Transmission unit 930 is used to send second message to terminal.Second message includes the second information, and the second information includes The information that PDU session establishments receive, to complete the foundation of PDU sessions.

Optionally, in the embodiment of the present application, first network slice selects information to apply corresponding S-NSSAI for first.

Wherein, the first application is the third party application installed in terminal, for example, QQ, facebook, mailbox etc..

It should be noted that the AMF entities that the AMF entities that Figure 14 is provided can be provided with Figure 13 are an equipment, wherein Receiving unit 910, processing unit 920 and transmission unit 930 in Figure 14 can be receiving unit 810, processing list in Figure 13 Member 820 and transmission unit 830.

In addition to this, the terminal that Fig. 9 to Figure 11 is provided can also include storage unit and the AMF that Figure 12 to Figure 14 is provided Entity can also include storage unit, for storing relevant instruction and data.

It should be noted that during terminal establishes PDU sessions, AMF entities receive terminal is sent first and disappear Breath, that is, after receiving PDU session establishment solicited messages, the information for including according to first message, such as Figure 10, Figure 11 or The information selection V-SMF entities and H-SMF entities that first message includes in Figure 13, Figure 14, complete the foundation of PDU sessions, mistake Journey is identical as method/step of S204 to S214 in Fig. 6, and for succinct description, details are not described herein.

Figure 15 provides a kind of terminal for the embodiment of the present application.As shown in figure 15, which may include transmitter 1010 With receiver 1020.

Transmitter 1010, for sending login request message to access and mobile management function AMF entities, registration request disappears Breath includes the first parameter, and the first parameter is for asking network to be sliced selection strategy.

Receiver 1020, the registration received message for receiving the transmission of AMF entities, registration received message includes that network is cut Piece selection strategy, during carrying out PDU session establishments in order to subsequent terminal, terminal can be according to current VPLMN or HPLMN NSSP accurately determine corresponding S-NSSAI, avoid when terminal establishes PDU sessions, AMF entities can not find net where terminal The corresponding S-NSSAI of network can not complete the foundation of PDU sessions, and then can not be communicated.

Optionally, in the embodiment of the present application, terminal can also include processor and memory.Processor is used for from storage Instruction is transferred in device carries out corresponding data processing.Memory is for storing corresponding instruction and data.

Figure 16 provides a kind of terminal for the embodiment of the present application.As shown in figure 16, which may include transmitter 1110 With receiver 1120.

Transmitter 1110, for sending first message to access and mobile management function AMF entities, first message includes the One information, first network slice selection information and the second network slice selection information, the first information include that agreement number is established in request According to the information of device PDU sessions, first network slice selection information is used for AMF entity selections the first conversation management control function SMF Entity, the second network slice selection information are used for the 2nd SMF entities of AMF entity selections.

Receiver 1120, the second message for receiving the transmission of AMF entities, second message include the second information, the second letter The information that breath receives comprising PDU session establishments.

Optionally, in one embodiment of the application, first network slice selects information that can apply for first to visit Ask the corresponding single network slice selection auxiliary information S-NSSAI of public land mobile network VPLMN；Second network slice selection letter Breath applies S-NSSAI corresponding in Home Public Land Mobile Network HPLMN for first.

Optionally, in another embodiment of the application, first message further includes instruction information, and instruction information is used to indicate First network slice selects information to access the single network slice selection auxiliary information S- of public land mobile network VPLMN NSSAI；Select information for the S- of Home Public Land Mobile Network HPLMN alternatively, instruction information is used to indicate first network slice NSSAI.After receiving first message in order to AMF entities, determine that first network is sliced according to the instruction information in first message Information and the second network slice selection information are selected, the foundation of PDU sessions is further completed.

Further optionally, terminal provided by the embodiments of the present application can also include processor and memory.Memory is used for Corresponding instruction and data is stored, in order to handle the instruction for transferring memory, processing handles data accordingly.

Figure 17 provides a kind of terminal for the embodiment of the present application.As shown in figure 17, which may include transmitter 1210 With receiver 1220.

Transmitter 1210, for sending first message, first message packet to access and mobile network management function AMF entities Containing the first information, network slice selection information and instruction information, the first information includes that protocol data device PDU sessions are established in request Information, network slice selection information are used for AMF entity selection conversation management control function SMF entities, and instruction information is used to indicate It is that terminal selects auxiliary information S- in the single network slice for accessing public land mobile network VPLMN that network slice, which selects information, NSSAI, or be used to indicate network slice select information for terminal Home Public Land Mobile Network HPLMN S-NSSAI.

Receiver 1220, the second message for receiving the transmission of AMF entities, second message include the second information, the second letter Breath includes the information that PDU session establishments receive.

Optionally, in one embodiment of the application, network slice selects information to apply corresponding S- for first NSSAI。

Optionally, in another embodiment of the application, terminal further includes processor 1230, for determining that network is sliced Select information.

Optionally, in one embodiment, processor 1230 determines network slice selection information, including：

In the network slice selection strategy for accessing public land mobile network VPLMN, if there are first to apply corresponding S- NSSAI, then terminal determine S-NSSAI be network slice selection information；Alternatively, in the net of Home Public Land Mobile Network HPLMN Network is sliced in selection strategy, to apply corresponding S-NSSAI, terminal to determine that S-NSSAI is network slice selection if there are first Information.

Equally, optionally, terminal provided by the embodiments of the present application can also include processor and memory.Memory is used for Corresponding instruction and data is stored, in order to handle the instruction for transferring memory, data are handled accordingly.

Figure 18 provides a kind of access and mobile management function AMF entities for the embodiment of the present application.As shown in figure 18, should AMF entities may include receiver 1310, processor 1320 and receiver 1330.

Receiver 1310, the login request message for receiving terminal transmission, login request message include the first parameter, the One parameter is for asking network slice selection strategy

Processor 1320 is sliced selection strategy for obtaining network according to login request message.

Transmitter 1330, for sending registration received message to terminal, registration received message includes network slice selection Strategy.

Optionally, in one embodiment of the application, processor obtains network slice selection according to login request message Strategy, including：

Transmitter 1310 sends first message to policy control functions PCF entities, and first message includes the first parameter；It receives Device 1330 receives the second message that PCF entities are sent, and second message includes network slice selection strategy.

Optionally, AMF provided by the embodiments of the present application can also include memory.Memory is for storing corresponding instruction And data are handled data in order to handle the instruction for transferring memory accordingly.

Figure 19 provides a kind of access and mobile management function AMF entities for the embodiment of the present application.As shown in figure 19, should AMF entities may include receiver 1410, processor 1420 and receiver 1430.

Receiver 1410, the first message for receiving terminal transmission, first message are cut comprising the first information, first network Piece selects information and the second network slice selection information, and the first information includes the information that protocol data device PDU sessions are established in request

Processor 1420 determines that the first conversation management control function SMF is real for being sliced selection information according to first network Body, and selection information is sliced according to the second network and determines the 2nd SMF entities；

Transmitter 1430, for sending second message to terminal, second message includes the second information, and the second information includes The information that PDU session establishments receive.

Optionally, in one embodiment of the application, first network slice selects information to be applied for first and is accessing public affairs The corresponding single network slice selection auxiliary information S-NSSAI of land mobile VPLMN altogether；Second network slice select information for First applies S-NSSAI corresponding in Home Public Land Mobile Network HPLMN.

In another embodiment of the application, first message further includes instruction information, and instruction information is used to indicate the first net Network slice selects information to access the single network slice selection auxiliary information S-NSSAI of public land mobile network VPLMN；Or Person, instruction information are used to indicate first network slice and select information for the S-NSSAI of Home Public Land Mobile Network HPLMN.With After receiving first message convenient for AMF entities, first network slice selection information is determined according to the instruction information in first message And second network slice selection information, further complete PDU sessions foundation.

Further optionally, AMF entities provided by the embodiments of the present application can also include memory.Memory is for storing Corresponding instruction and data is handled data in order to handle the instruction for transferring memory accordingly.

Figure 20 provides a kind of access and mobile management function AMF entities for the embodiment of the present application.As shown in figure 20, should AMF entities may include receiver 1510, processor 1520 and transmitter 1530.

Receiver 1510, the first message for receiving terminal transmission, first message are cut comprising the first information, first network It includes the information that protocol data device PDU sessions are established in request that piece, which selects information and instruction information, the first information,；Instruction information is used for It is that terminal selects auxiliary in the single network slice for accessing public land mobile network VPLMN to indicate that first network slice selects information Information S-NSSAI, or be used to indicate network slice select information for terminal Home Public Land Mobile Network HPLMN S- NSSAI。

Processor 1520, for according to instruction information determine first network slice select information for terminal VPLMN list One network slice selection auxiliary information S-NSSAI, or determine first network slice select information for terminal HPLMN S- NSSAI；It is sliced selection information according to first network, selects the first conversation management control function SMF entities；It is cut according to first network Piece selects the correspondence relationship information of the S-NSSAI of information and the S-NSSAI and HPLMN of VPLMN to determine that the second network slice selects Information is selected, and selection information is sliced according to the second network and selects the 2nd SMF entities.

Transmitter 1530, for sending second message to terminal, second message includes the second information, and the second information includes The information that PDU session establishments receive.

In one embodiment of the application, first network slice selects information to apply corresponding S-NSSAI for first.

In addition, AMF entities provided by the embodiments of the present application can also include processor and memory.Memory is for storing Corresponding instruction and data is handled data in order to handle the instruction for transferring memory accordingly.

The embodiment of the present application provides a kind of computer program product including instruction, when described instruction is transported on computers When row, method/step in above-mentioned Fig. 5 to Fig. 8 is executed.

The embodiment of the present application provides a kind of computer readable storage medium, for storing instruction, when described instruction is being counted When being executed on calculation machine, method/step in above-mentioned Fig. 5 to Fig. 8 is executed.

It, can be wholly or partly by software, hardware, firmware or it is arbitrary in above-mentioned each embodiment of the present invention It combines to realize.When implemented in software, it can entirely or partly realize in the form of a computer program product.The meter Calculation machine program product includes one or more computer instructions.Load and execute on computers the computer program instructions When, it entirely or partly generates according to the flow or function described in the embodiment of the present invention.The computer can be general-purpose computations Machine, special purpose computer, computer network or other programmable devices.The computer instruction can be stored in computer can It reads in storage medium, or is transmitted from a computer-readable medium to another computer-readable medium, for example, the calculating Machine instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center Word user line (digital subscriber line, DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another A web-site, computer, server or data center are transmitted.The computer readable storage medium can be computer Any usable medium that can be accessed is either comprising data such as one or more usable mediums integrated server, data centers Storage device.The usable medium can be magnetic medium (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or Person's semiconductor medium (for example, solid state disk) etc..

The preferable specific implementation mode of the above, only the application, but the protection domain of the application is not limited thereto, Any one skilled in the art is in the technical scope that the application discloses, the change or replacement that can be readily occurred in, It should all cover within the protection domain of the application.Therefore, the protection domain of the application should be with scope of the claims Subject to.

Claims

1. a kind of session establishing method, which is characterized in that the method includes：

Terminal sends first message to access and mobile management function AMF entities, and the first message includes the first information, first Network slice selection information and the second network slice selection information, the first information include that protocol Data Unit is established in request The information of PDU sessions, the first network slice selection information are used for the first conversation management control of AMF entity selections function SMF entities, the second network slice selection information are used for the 2nd SMF entities of AMF entity selections；

The terminal receives the second message that the AMF entities are sent, and the second message includes the second information, second letter The information that breath receives comprising PDU session establishments.

2. according to the method described in claim 1, it is characterized in that,

The first network slice selects information to be applied for first and is accessing the corresponding single networks of public land mobile network VPLMN Slice selection auxiliary information S-NSSAI；

The second network slice selects information to apply S- corresponding in Home Public Land Mobile Network HPLMN for described first NSSAI。

3. according to the method described in claim 1, it is characterized in that, the first message further includes indicating information, the instruction Information is used to indicate the first network slice and selects information to access the single network slice choosing of public land mobile network VPLMN Select auxiliary information S-NSSAI；Or the instruction information is used to indicate the first network slice and selects information public for ownership The S-NSSAI of land mobile HPLMN.

4. a kind of method of session establishment, which is characterized in that the method includes：

Access with mobile management function AMF entities receive terminal send first message, the first message include the first information, First network slice selection information and the second network slice selection information, the first information include that protocol data list is established in request The information of first PDU sessions；

The AMF entities are sliced selection information according to the first network and determine the first conversation management control function SMF entities, with And selection information is sliced according to second network and determines the 2nd SMF entities；

The AMF entities send second message to the terminal, and the second message includes the second information, second packet The information that session establishment containing PDU receives.

5. according to the method described in claim 4, it is characterized in that,

6. according to the method described in claim 4, it is characterized in that, the first message further includes indicating information, the instruction Information is used to indicate the first network slice and selects information to access the single network slice choosing of public land mobile network VPLMN Select auxiliary information S-NSSAI；Select information to be belonged to public affairs alternatively, the instruction information is used to indicate the first network slice The S-NSSAI of land mobile HPLMN altogether.

7. a kind of terminal, which is characterized in that the terminal includes：

Transmission unit, for sending first message to access and mobile management function AMF entities, the first message includes first Information, first network slice selection information and the second network slice selection information, the first information include that agreement is established in request The information of data cell PDU sessions, the first network slice selection information are used for first session management of AMF entity selections Control function SMF entities, the second network slice selection information are used for the 2nd SMF entities of AMF entity selections；

Receiving unit, the second message sent for receiving the AMF entities, the second message includes the second information, described Second information includes the information that PDU session establishments receive.

8. terminal according to claim 7, which is characterized in that

9. terminal according to claim 7, which is characterized in that the first message further includes instruction information, the instruction Information is used to indicate the first network slice and selects information to access the single network slice choosing of public land mobile network VPLMN Select auxiliary information S-NSSAI；Select information public for ownership alternatively, the instruction information is used to indicate the first network slice The S-NSSAI of land mobile HPLMN.

10. a kind of access and mobile management function AMF entities, which is characterized in that the access and mobile management functional entity packet It includes：

Receiving unit, the first message for receiving terminal transmission, the first message include the first information, first network slice It includes that protocol Data Unit PDU sessions are established in request to select information and the second network slice selection information, the first information Information；

Processing unit determines the first conversation management control function SMF entities for being sliced selection information according to the first network, And selection information is sliced according to second network and determines the 2nd SMF entities；

Transmission unit, for sending second message to the terminal, the second message includes the second information, second information Including the information that PDU session establishments receive.

11. access according to claim 10 and mobile management functional entity, which is characterized in that

12. the access according to claim 10 or 11 and mobile management functional entity, which is characterized in that the first message Further include instruction information, the instruction information is used to indicate the first network slice and selects information to access public land movement Net the single network slice selection auxiliary information S-NSSAI of VPLMN；Alternatively, the instruction information is used to indicate first net Network slice selects information for the S-NSSAI of Home Public Land Mobile Network HPLMN.

13. a kind of terminal, which is characterized in that the terminal includes：

Transmitter, for sending first message to access and mobile management function AMF entities, the first message includes the first letter Breath, first network slice selection information and the second network slice selection information, the first information include that agreement number is established in request According to the information of device PDU sessions, the first network slice selection information is used for first conversation management control of AMF entity selections Function SMF entities, the second network slice selection information are used for the 2nd SMF entities of AMF entity selections；

Receiver, the second message sent for receiving the AMF entities, the second message include the second information, and described the Two information include the information that PDU session establishments receive.

14. terminal according to claim 13, which is characterized in that

15. terminal according to claim 13, which is characterized in that the first message further includes instruction information, the finger Show that information is used to indicate the first network slice and selects information to access the single network slice of public land mobile network VPLMN Select auxiliary information S-NSSAI；Select information public for ownership alternatively, the instruction information is used to indicate the first network slice The S-NSSAI of land mobile HPLMN altogether.

16. a kind of access and mobile management function AMF entities, which is characterized in that the access and mobile management functional entity packet It includes：

Receiver, the first message for receiving terminal transmission, the first message include the first information, first network slice choosing Information and the second network slice selection information are selected, the first information includes the information that protocol data device PDU sessions are established in request；

Processor determines the first conversation management control function SMF entities for being sliced selection information according to the first network, with And selection information is sliced according to second network and determines the 2nd SMF entities；

Transmitter, for sending second message to the terminal, the second message includes the second information, second packet The information that session establishment containing PDU receives.

17. access according to claim 16 and mobile management functional entity, which is characterized in that

18. access according to claim 16 or 17 and mobile management functional entity, which is characterized in that the first message Further include instruction information, the instruction information is used to indicate the first network slice and selects information to access public land movement Net the single network slice selection auxiliary information S-NSSAI of VPLMN；Alternatively, the instruction information is used to indicate first net Network slice selects information for the S-NSSAI of Home Public Land Mobile Network HPLMN.