CN110392448A - A kind of session rebuilding methods, devices and systems - Google Patents

Abstract

This application discloses a kind of session rebuilding methods, devices and systems, are related to field of communication technology, help to improve the transmission performance of business.This method may include: when the relevant network slice example of the first PDU session of terminal is unavailable, and the relevant network slice of the first PDU session is available, and SMF network element sends the first information to terminal；The first information is used to indicate terminal and initiates PDU session rebuilding process.Wherein, which is used to rebuild a PDU session based on network slice.

Description

A kind of session rebuilding methods, devices and systems

Technical field

This application involves field of communication technology more particularly to a kind of session rebuilding methods, devices and systems.

Background technique

In the 5th generation (5rd generation, 5G) network architecture, introduce network slice (network slice) and Network is sliced the concept of example (network slice instance, NSI).Network slice is one for supporting particular network The network of the logic isolation of function and network characteristic, can end-to-end (end to end, E2E) include whole network, can also It is shared in multiple networks slice with subnetwork function.Network slice is to meet 5G mobile communication technology about network discrepancy The technology of demand.In general, heterogeneous networks slice network characterization it is not identical, and require network be sliced between it is mutually isolated, mutually not It influences.Such as enhance the network of realization (augmented reality, AR) or Virtual Realization (virtual reality, VR) business Slice requires big bandwidth, low time delay；The network slice of Internet of Things (internet of things, IOT) business requires to support sea Terminal access is measured, but bandwidth is small, time delay is not required.It is real that one or more network slices can be created based on a network slice Example.There are the network characterization of network slice, different nets generally, based on multiple networks slice example of consolidated network slice creation The network characterization that network is sliced example is not exactly the same.

During specific implementation, which can be met in the regional deployment according to some region of business demand The network slice asked.For example, a certain region has IOT business, then can be sliced in the network of regional deployment IOT business.Separately Outside, it is sliced based on each network, operator can dispose one or more networks according to customer order and be sliced example.Network can be with It is that selecting network slice and network are sliced example according to the demand of terminal, so that terminal be allow to be based on selected net Network slice example establishes Packet Data Unit (packet data unit, PDU) session.

With the reasons such as mobile of terminal, it is real to may cause the relevant network slice of some current PDU session of the terminal Example is unavailable.This will lead to the PDU conversation established based on network slice example, thus traffic affecting continuity.

Summary of the invention

The embodiment of the present application provides a kind of session rebuilding methods, devices and systems, helps to improve the transporting of business Energy.

In a first aspect, providing a kind of session rebuilding method, comprising: when the relevant network of the first PDU session of terminal is cut Piece example is unavailable, and the relevant network of the first PDU session is sliced when can be used, and SMF network element sends the first information to terminal；First Information is used to indicate terminal and initiates PDU session rebuilding process.Wherein, which is used to be sliced based on the network Rebuild a PDU session.Since for a terminal, network is that the network slice of terminal selection is usually to be more conform with Therefore the network slice of terminal current business transmission is sliced by the network to rebuild a PDU session, Ke Yi The performance of the transmission of the business is ensured to a certain extent.

In a kind of possible design, the information type of the first information is request or allows.If the info class of the first information Type is request, then terminal initiates PDU session rebuilding process usually after receiving the first information at once.If the first information Information type is to allow, then terminal can decide whether to initiate PDU meeting after receiving the first information, according to own situation Words rebuild process.Certain the application does not limit the information type of the first information.

In a kind of possible design, this method can also include: that SMF network element receives the first AMF network element is sent second Information；Second information is used to indicate: the relevant network slice example of the first PDU session is unavailable, and the first PDU session is relevant Network slice is available.In addition, the second information can also directly indicate that SMF network element sends the first information to terminal.

Optionally, SMF network element receives the second information that the first AMF network element is sent, and may include: SMF network element through the 2nd AMF Network element receives the second information that the first AMF network element is sent.Wherein, the first AMF network element does not support the relevant network slice of the first PDU Example.For example, the 2nd AMF network element is old AMF network element in register flow path, the first AMF network element is new AMF network element.For example, In In switching flow, the 2nd AMF network element is source AMF network element, and the first AMF network element is target AMF network element.The optional mode provides A kind of transmission flow of second information, the application is without being limited thereto, such as can be with reference to hereinafter specific embodiment part.

In a kind of possible design, it may include: SMF network element through third that SMF network element, which sends the first information to terminal, AMF network element and the 4th AMF network element send the first information to terminal.4th AMF network element does not support the relevant network of the first PDU session It is sliced example.For example, the 3rd AMF network element is old AMF network element, the 4th AMF network element is new AMF network element.For example, in switching flow In, the 3rd AMF network element is source AMF network element, and the 4th AMF network element is target AMF network element.The possible design provides one kind first The transmission flow of information, the application is without being limited thereto, such as can be with reference to hereinafter specific embodiment part.

In a kind of possible design, SMF network element sends the first letter to terminal through the 3rd AMF network element and the 4th AMF network element Breath, which may include: SMF network element, sends the first information to the 4th AMF network element through the 3rd AMF network element；The first information is carried in PDU meeting Terminal is sent to by the 4th AMF network element in speech phase message；PDU session status message includes: at least one PDU session of terminal Status information；The state of any one PDU session includes existing, discharge or rebuilding；At least one PDU session includes first PDU session, the status information of the first PDU session indicate to rebuild.The possible design provides a kind of disappearing for carrying first information Breath.Certainly without being limited thereto when specific implementation.

In a kind of possible design, it may include: SMF network element according to strategy that SMF network element, which sends the first information to terminal, Information sends the first information to terminal；Policy information is used to indicate: the relevant network slice example of the first PDU session is unavailable, And the first PDU session relevant network slice it is available when, initiate the strategy of PDU session rebuilding process.Optionally, policy information can It is local to be stored in advance in SMF network element, or SMF network element is sent to by policy control functions PCF network element.

Second aspect provides a kind of session rebuilding method, comprising: when the relevant network of the first PDU session of terminal is cut Piece example is unavailable, and the relevant network of the first PDU session is sliced when can be used, and the first AMF network element sends the second letter to SMF network element Breath；Second information sends the first information to terminal according to the second information for SMF network element, and the first information is used to indicate terminal initiation PDU session rebuilding process.For example, to be used to indicate the first PDU session relevant network slice example unavailable for the second information, and the The relevant network slice of one PDU session is available；Alternatively, the second information, which is directly used in instruction SMF network element, sends the first letter to terminal Breath, in this case, SMF network element can not need to know whether present case is " the relevant network slice example of the first PDU session It is unavailable, and the relevant network slice of the first PDU session is available ".

In a kind of possible design, the first AMF network element determines the relevant network slice example of the first PDU session of terminal It is unavailable, and the first PDU session relevant network slice is available, it can realize one of in the following way:

1: the one AMF network element of mode receives the third information that the 2nd AMF network element or NRF network element are sent, and is believed according to third Breath determines that the 2nd AMF network element does not support the relevant network slice example of the first PDU session, and supports the first PDU session relevant Network slice.Wherein, third information is used to indicate the network slice example and network slice of the 2nd AMF network element support.First AMF Network element.For example, the first AMF network element is old AMF network element in register flow path, the 2nd AMF network element is new AMF network element.For example, In In switching flow, the first AMF network element is source AMF network element, and the 2nd AMF network element is target AMF network element.

2: the one AMF network element of mode receives the 4th information that the 2nd AMF network element or NRF network element are sent, and according to the 4th letter Breath determines that the first AMF network element does not support the relevant network slice example of the first PDU session, and supports the first PDU session relevant Network slice.Wherein, the 4th information is used to indicate the relevant network slice example of the first PDU session and network slice.For example, In In register flow path, the first AMF network element is new AMF network element, and the 2nd AMF network element is old AMF network element.For example, in switching flow, the One AMF network element is target AMF network element, and the 2nd AMF network element is source AMF network element.

3: the one AMF network element of mode is according to the location information of terminal, the clothes of the relevant network slice example of the first PDU session Business region and the coverage of the relevant network slice of the first PDU session, determine the relevant network slice of the first PDU session Example is unavailable, and the relevant network slice of the first PDU session is available.Specifically, the first AMF network element can be according to the position of terminal Confidence ceases the coverage of network slice example relevant with the first PDU session, determines the relevant network slice of the first PDU session Whether example can be used.First AMF network element can be according to the clothes of the location information of terminal and the relevant network slice of the first PDU session It is engaged in region, determining whether the relevant network slice of the first PDU session can be used.Optionally, the scheme replaced as one, first AMF network element can be sliced identification information/coverage of example according to the network after the location information of terminal and replacement, determine the Whether the relevant network slice of one PDU session can be used.Specific example can refer to following detailed description part.

4: the one AMF network element of mode sends the 5th information to NSSF network element；Wherein, the 5th information is used to indicate the first PDU The relevant network slice example of session is unavailable, and instruction NSSF network element sends available network to the first AMF network element and is sliced example Identification information.First AMF network element receives the identification information for the available network slice example that NSSF network element is sent；Wherein, it can use Network slice example network slice example relevant to the first PDU session belongs to consolidated network slice.

The third aspect provides a kind of session rebuilding method, comprising: terminal receives the first information from SMF network element；Its In, the relevant network slice example of the first PDU session of terminal is unavailable, and the relevant network slice of the first PDU session is available； The first information is used to indicate terminal and initiates PDU session rebuilding process.Terminal initiates PDU session after receiving the first information Rebuild process.Optionally, the information type of the first information is request or allows.

In a kind of possible design, terminal initiates PDU session rebuilding process after receiving the first information, can be with If including: the information type of the first information is to allow, when terminal determination needs to initiate PDU session rebuilding process, PDU meeting is initiated Words rebuild process.

Fourth aspect provides a kind of session rebuilding method, comprising: terminal receives the PDU session status that AMF network element is sent Message；Wherein, PDU session status message includes: the status information of at least one PDU session of terminal；Status information instruction is deposited , release and rebuild one of state；At least one PDU session includes the first PDU session, the state of the first PDU session Information instruction is rebuild；AMF network element sends PDU session status to terminal and disappears after the first information for receiving the transmission of SMF network element Breath；The first information is used to indicate terminal and initiates PDU session rebuilding process.Then, terminal is initiated after receiving the first information PDU session rebuilding process；SMF network element is determining that the relevant network slice example of the first PDU session is unavailable, and the first PDU meeting When talking about relevant network slice can be used, Xiang Suoshu terminal sends the first information.Terminal is initiated after receiving the first information PDU session rebuilding process.

5th aspect, provides a kind of SMF network element.The SMF network element can be used for executing times that above-mentioned first aspect provides A kind of method.The SMF network element specifically can be SMF network element described in above-mentioned first aspect.

In a kind of possible design, function mould can be carried out to SMF network element according to the method that above-mentioned first aspect provides The division of block, for example, each functional module of each function division can be corresponded to, it can also be by two or more function collection In Cheng Yi processing module.

In alternatively possible design, which may include: memory and processor, and memory is for storing Computer program, when which is executed by processor, so that either first aspect offer method is performed.

6th aspect, the embodiment of the present application provide a kind of first AMF network element.First AMF network element can be used for executing Any method that above-mentioned second aspect provides.First AMF network element specifically can be first described in above-mentioned second aspect AMF network element.

In a kind of possible design, function can be carried out to the first AMF network element according to the method that above-mentioned second aspect provides The division of energy module, for example, each functional module of each function division can be corresponded to, it can also be by two or more function It can be integrated in a processing module.

In alternatively possible design, the first AMF network element may include: memory and processor, and memory is used for Computer program is stored, when which is executed by processor, so that either second aspect offer method is performed.

7th aspect, the embodiment of the present application provide a kind of terminal installation.The terminal installation can be used for executing above-mentioned Any method that three aspects or fourth aspect provide.The terminal installation specifically can be in the above-mentioned third aspect or fourth aspect The terminal of description or the terminal installation can be chip.

It, can be according to the method that the above-mentioned third aspect or fourth aspect provide to terminal installation in a kind of possible design The division for carrying out functional module, for example, each functional module of each function division can be corresponded to, can also by two or two with On function be integrated in a processing module.

In alternatively possible design, which may include: memory and processor, and memory is for storing Computer program, when which is executed by processor, so that either the third aspect or fourth aspect offer method quilt It executes.

The embodiment of the present application also provides a kind of processing unit, to realize above-mentioned apparatus (such as SMF network element, the first AMF Network element or terminal installation) function, which includes processor and interface；Processing unit can be a chip, processing Device can be realized by hardware or be realized by software, and when passing through hardware realization, which can be logic Circuit, integrated circuit etc.；When by software to realize, which can be a general processor, be stored by reading The software code stored in device realizes that the memory can integrate in the processor, can be located at except processor, independently deposit In.

The embodiment of the present application also provides a kind of computer readable storage mediums, store computer instruction thereon, when this When computer instruction is run on computers, so as to execute above-mentioned first aspect any possible to fourth aspect for computer Method.

The embodiment of the present application also provides a kind of computer program products, when run on a computer, so that first Aspect to either fourth aspect offer method is performed.

Eighth aspect provides a kind of method for transmitting PDU session status message, comprising: AMF network element is sent to terminal PDU session status message；Wherein, PDU session status message includes: the status information of at least one PDU session of terminal；State One of state that information instruction exists, discharges and rebuilds.Optionally, the skill that AMF network element can be provided according to the prior art Art scheme optionally can also determine each PDU at least one PDU session in conjunction with technical solution provided by the present application The status information of session.

9th aspect provides a kind of method for transmitting PDU session status message, comprising: terminal receives PDU session status Message；Wherein, PDU session status message includes: the status information of at least one PDU session of terminal；Status information instruction is deposited , release and rebuild one of state.For any one PDU session, if the status information instruction of the PDU session is released It puts, then terminal initiates PDU session release process.If the status information of the PDU session indicates to rebuild, terminal initiates PDU session Rebuild process.Wherein, the trigger condition of the present embodiment initiation PDU session rebuilding process is without restriction, such as can refer to this The technical solution provided is provided, the prior art can also be referred to.Trigger condition about PDU session release process can also refer to The prior art.In addition, illustrating not needing to rebuild also not needing to discharge the PDU if the status information of a PDU session indicates exist Session.

Tenth aspect, the embodiment of the present application provide a kind of AMF network element.The AMF network element can be used for executing the above-mentioned 8th Any method that aspect provides.The AMF network element specifically can be AMF network element described in above-mentioned eighth aspect.

In a kind of possible design, function mould can be carried out to AMF network element according to the method that above-mentioned eighth aspect provides The division of block, for example, each functional module of each function division can be corresponded to, it can also be by two or more function collection In Cheng Yi processing module.

In alternatively possible design, which may include: memory and processor, and memory is for storing Computer program, when which is executed by processor, so that either eighth aspect offer method is performed.

Tenth on the one hand, and the embodiment of the present application provides a kind of terminal installation.The terminal installation can be used for executing above-mentioned Any method that 9th aspect provides.The terminal installation specifically can be terminal or end described in above-mentioned 9th aspect End device can be chip.

In a kind of possible design, function mould can be carried out to terminal installation according to the method that above-mentioned 9th aspect provides The division of block, for example, each functional module of each function division can be corresponded to, it can also be by two or more function collection In Cheng Yi processing module.

In alternatively possible design, which may include: memory and processor, and memory is for storing Computer program, when which is executed by processor, so that either the 9th aspect offer method is performed.

The embodiment of the present application also provides a kind of processing unit, to realize that (such as above-mentioned tenth aspect mentions above-mentioned apparatus The AMF network element of confession or it is above-mentioned tenth on the one hand provide terminal installation) function, which includes processor and interface； Processing unit can be a chip, and processor can be realized by hardware or be realized by software, when by hard When part is realized, which can be logic circuit, integrated circuit etc.；When by software to realize, which be can be One general processor realizes that the memory can integrate in processor by reading the software code stored in memory In, it can be located at except processor, be individually present.

The embodiment of the present application also provides a kind of computer readable storage mediums, store computer instruction thereon, when this When computer instruction is run on computers so that computer execute above-mentioned eighth aspect to the 9th aspect it is any possible Method.

The embodiment of the present application also provides a kind of computer program products, when run on a computer, so that the 8th Aspect to either the 9th aspect offer method is performed.

Present invention also provides a kind of chip system, which includes processor, is realized for communication device above-mentioned Function involved in various aspects receives for example, generating, and sends, or data and/or letter involved in the processing above method Breath.In a kind of possible design, the chip system further includes memory, and the memory must for saving communication device The program instruction and data wanted.The chip system, can be made of chip, also may include chip and other discrete devices.It should Chip system may be a kind of device.

It should be understood that any apparatus system or computer storage medium or computer program product of above-mentioned offer are equal For executing corresponding method presented above, therefore, attainable beneficial effect can refer in corresponding method Beneficial effect, details are not described herein again.

Detailed description of the invention

A kind of configuration diagram for communication system that Fig. 1 is applicable in by technical solution provided by the embodiments of the present application；

Fig. 2 is the pass that a kind of network provided by the embodiments of the present application is sliced between example, PDU session and network function network element The schematic diagram of system；

Fig. 3 is the schematic diagram for the relationship that a kind of network provided by the embodiments of the present application is sliced between example and network slice；

Fig. 4 is the flow diagram one of the method for PDU session rebuilding provided by the embodiments of the present application；

Fig. 5 is the flow diagram two of the method for PDU session rebuilding provided by the embodiments of the present application；

Fig. 6 is the flow diagram three of the method for PDU session rebuilding provided by the embodiments of the present application；

Fig. 7 is the flow diagram four of the method for PDU session rebuilding provided by the embodiments of the present application；

Fig. 8 is the flow diagram five of the method for PDU session rebuilding provided by the embodiments of the present application；

Fig. 9 is the flow diagram six of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 10 is the flow diagram seven of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 11 is the flow diagram eight of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 12 is the flow diagram nine of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 13 is the flow diagram ten of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 14 is the flow diagram 11 of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 15 is the flow diagram 12 of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 16 is the flow diagram 13 of the method for PDU session rebuilding provided by the embodiments of the present application；

Figure 17 is a kind of structural schematic diagram of SMF network element provided by the embodiments of the present application；

Figure 18 is a kind of structural schematic diagram of first AMF network element provided by the embodiments of the present application；

Figure 19 is a kind of structural schematic diagram of terminal installation provided by the embodiments of the present application；

Figure 20 is a kind of structural schematic diagram of communication equipment provided by the embodiments of the present application.

Specific embodiment

Technical solution provided by the embodiments of the present application can be applied in wireless communication system, which can be with It is 5G system, or in other following communication systems.Can certainly be long term evolution (long term evolution, LTE) system, LTE evolution (LTE-Advanced, LTE-A) system etc..By taking wireless communication system is 5G system as an example, such as Fig. 1 institute Show, by a kind of configuration diagram for communication system that technical solution provided by the embodiments of the present application is applicable in.

In Fig. 1, communication system may include: terminal 10, Radio Access Network (radio access network, ) or access network (access network, AN) 20 (hereinafter referred to (R) AN20), core net 30 and data network RAN Network (data network, DN) 40.Wherein, the core network element in core net 30 (or referred to as network function network element) can wrap Include: access and mobile management function to ps domain (access and mobility management function, AMF) network element 301, Conversation management functional (session management function, SMF) network element 302, policy control functions (policy Control function, PCF) network element 303, network slice selection function (network slice selection Function, NSSF) network element 304, network storage function (network repository function, NRF) network element 305, use Family face function (user plane function, UPF) network element 306 etc..Connection between above-mentioned each network element can be wirelessly to connect It connects or wired connection is illustrated in Fig. 1 using solid line in order to facilitate the connection relationship between each network element is intuitively indicated.Respectively Interface between network element has had a detailed description in the prior art, this is no longer described in detail in the application.

Terminal 10 may include the various handheld devices with wireless communication function, mobile unit, wearable device, calculating Equipment or the other processing equipments for being connected to radio modem；Can also include subscriber unit (subscriber unit), Cellular phone (cellular phone), smart phone (smart phone), wireless data card, personal digital assistant (personal digital assistant, PDA) computer, radio modem (modem), hand-held is set plate computer Standby (handheld), laptop computer (laptop computer), wireless phone (cordless phone) or wireless local Loop (wireless local loop, WLL) platform, machine type communication (machine type communication, MTC) Terminal, user equipment (user equipment, UE), mobile station (mobile station, MS), terminal device (terminal ) or trunk subscriber equipment etc. device.Wherein, trunk subscriber equipment for example can be 5G home gateway (residential Gateway, RG).For convenience of description, in the application, these equipment are referred to as terminal (terminal).

(R) AN 20 may be used to provide wireless connection, between terminal 10 and core net 30.(R) net in AN 20 Member can such as, but not limited to include base station, evolved base station (evolved node base station, eNB), next-generation base Stand (next generation node base station, gNB), novel radio electricity base station (new radio eNB), macro base Stand, micro-base station, high frequency base station or send and receive point (transmission and reception point, TRP)), it is non- 3GPP accesses network (such as WiFi) and/or non-3 gpp interworking function (non-3GPP interworking function, N3IWF) Etc. equipment.It should be noted that (R) AN20 hereinafter can be understood as the network element in (R) AN, it is described collectively herein, hereafter It repeats no more.

AMF network element 301 can be used for connection management, mobile management, registration management, access authentication and authorization, accessibility Management, safe context management and selection of SMF network element 302 etc..SMF network element 302 can be used for session management such as session Foundation, modification and release etc., the selection of UPF network element 306 and control, business and conversation continuity (service and session Continuity) the selection and roaming service etc. of mode.PCF network element 303 may be used to provide policy control service and obtain Take relevant signing information of strategic decision-making etc..NSSF network element 304 can be used for selecting network slice for terminal 10, determine that network is cut Piece selection assistance information and the one or more AMF network elements 301 etc. for being determined as the service of terminal 10.NRF network element 305 can be used for Service discovery safeguards the service that available network function text and these network functions are supported.UPF network element 306, can be used for Event relevant to user face is handled, such as transmits or routes data packet, detection data packet, report portfolio, processing Service Quality Measure (quality of service, QoS), Lawful Interception, storage downlink data packet etc..

DN40, such as can be carrier service, linking Internet or third party's service etc..

It should be understood that although it is not shown, above-mentioned 5G network is also possible that other network elements, such as authentication service function (authentication server function, AUSF) network element, application function (appllication function, AF) Network element and open functional network element (network exposure function, the NEF) network element of ability etc., the application does not make this It is specific to limit.

It should be noted that each network element in Fig. 1, such as terminal 10, (R) AN20, AMF network element 301, SMF network element 302, PCF Network element 303, NSSF network element 304, NRF network element 305 and UPF network element 306 etc. are only a names, and name is to equipment not structure itself At restriction.In 5G network and following other networks, these network elements can also be other names, the embodiment of the present application pair This is not especially limited.For example, AMF network element 301 it is also possible to be replaced by AMF301 AMF entity etc., carries out herein It is described collectively, repeats no more below.

Optionally, each network element in Fig. 1 can be realized by an equipment, can also be realized by multiple equipment, may be used also jointly To be a functional module in an equipment, the embodiment of the present application is not especially limited this.It is understood that above-mentioned function It can be either network element in hardware device, be also possible to the software function run on specialized hardware or platform The virtualization instantiated in (for example, cloud platform).

In order to facilitate the technical solution for understanding the embodiment of the present application, network slice, network slice example are introduced briefly below And PDU session and network slice, network are sliced example, PDU session and core network element (or being network function network element) Between relationship.

Network slice is the definition in a Public Mobile Network (public land mobile network, PLMN) , it may include: core network control surface and user plane functions network element (network function, NF).It is introduced in network slice Network slice selection auxiliary information (network slice selection assistance information, NSSAI) Concept.A list NSSAI can be used, and ((single NSSAI, S-NSSAI) is sliced to identify a network.One S- NSSAI may include slice/service type (slice/service type, SST), for identifying the feature kimonos of network slice The performance of business.Optionally, a S-NSSAI can also include that slice distinguishes instruction (slice differentiator, SD), use Multiple networks slice of identical SST type is distinguished in supplement SST.As an example, the SST type of standard may include: Enhance mobile broadband (enhanced mobile broadbank, eMBB), high reliability low time delay communicates (ultra- Reliable low latency communications, URLLC), magnanimity Internet of Things (massive internet of Things, MIoT) etc..

The demand etc. of operation or deployment based on operator, a network slice example can be with one or more S- NSSAI is related, and it is related that a S-NSSAI can be sliced example to one or more networks.It is relevant to same S-NSSAI multiple Network slice example can be deployed in same or different tracing area (tracking areas, TA).When with identical S- When the relevant multiple network slice example deployments of NSSAI are in identical TA, the AMF network element for serving terminal may belong in logic Example is sliced in more than one network relevant to the S-NSSAI.In a PLMN, as a S-NSSAI and multiple networks When being sliced example correlation, the network slice example in these networks slice example, which is served, to be allowed to use this S-NSSAI Terminal.For any one S-NSSAI, network may only use at any time one it is relevant to the S-NSSAI Network is sliced example service terminal, except non-network slice example is given registration area is no longer valid or terminal allows Situations such as NSSAI changes.

One or more network slice example relevant to a S-NSSAI is properly termed as the net that the S-NSSAI is marked Network slice includes that the network of (or comprising) is sliced example.One or more network slice example belongs to network slice.It can be with A network slice example is identified using the identification information of network slice example.Wherein, the identification information of network slice example It can be the identifier (network slice instance identifier, NSI ID) etc. of network slice example.

Each network slice example may include (or corresponding) one group of network functional network element.It is usual that heterogeneous networks are sliced example Including different groups of network functional network elements.The network function network element may include AMF network element, SMF network element and UPF network element in Fig. 1 Deng.It may include the same network function network element in difference group network functional network element.Such as heterogeneous networks slice example can correspond to Same AMF network element/SMF network element.Each network slice may include one group of network functional network element.One network, which is sliced, includes Network function network element may be considered the collection for belonging to the network function network element that the all-network slice example that the network is sliced includes It closes.

If a network slice example/network slice includes a network function network element, it may be considered that the network function Network element supports network slice example/network slice.For example, if a network slice example/network slice includes an AMF net Member, it may be considered that the AMF network element supports network slice example/network slice.In general, when carrying out network deployment, i.e., Dispose which good network function network element supports which or which network is sliced and network is sliced example.It is of course also possible in network In operational process, the network slice and network for updating some or the support of certain network function network elements are sliced example, and the application is to this Without limiting.

Each network function slice and network slice all have certain coverage, and respective coverage can be When carrying out network deployment, that is, dispose.Certain the application is without being limited thereto.The coverage of one network slice can consider It is the sum of the coverage for belonging to the all-network slice example of network slice.

Terminal can access multiple networks slice, terminal can based on one or more the access of network slice example it is same Network slice.Terminal can establish one or more PDU session in a network slice example.Each PDU session is to be based on What one network slice example was established.In the application, the network slice example that a PDU session is based on will be established and be known as being somebody's turn to do The relevant network of PDU session is sliced example, which is sliced the slice of network belonging to example and is known as the relevant net of PDU session Network slice.Wherein, PDU session is the connection between terminal and DN (i.e. DN40 in Fig. 1), for providing PDU connection service.Its In, connection type can be interconnected between network agreement (internet protocol, IP) connection, Ethernet connection or Non-structural data connection etc..The PDU connection service that 5G core net is supported, refers to and provides terminal and by data network title (data Network name, DNN) determine DN between PDU exchange service.Terminal can establish one or more PDU sessions, to connect It is connected to identical DN or different DN.Wherein, UE, which can establish, provides the PDU session of service by different UPF network elements, to connect It is connected to identical DN.

As shown in Fig. 2, being a kind of network slice example, PDU session and network function network element provided by the embodiments of the present application Between relationship schematic diagram.In Fig. 2, terminal establishes PDU session 1, PDU session 2 and PDU session 3.Wherein, PDU session 1 is established based on network slice example 11, and PDU session 2 is established based on network slice example 21, and PDU session 3 is to be based on Network is sliced what example 31 was established.Wherein, PDU session 1 and PDU session 2 are all connected to DN1, and PDU session 3 is connected to DN2.Often A network slice example (such as network is sliced example 1,2,3) includes respective network function network element, wherein is illustrated in Fig. 2 SMF network element, NRF network element, PCF network element and the UPF network element that each network slice example includes, certain the application are without being limited thereto.

As shown in figure 3, being the relationship between a kind of network slice example provided by the embodiments of the present application and network slice Schematic diagram.Wherein, Fig. 3 is drawn based on Fig. 2.Specifically, the network slice example 11 in Fig. 2 belongs to network slice 1, In addition, network slice 1 can also include that network is sliced example 12,13；Network slice example 21 belongs to network slice 2, in addition, net Network slice 2 can also include network slice 22；Network slice example 31 belongs to network slice 3.

It is available that network slice example/network slice is also described in the embodiment of the present application, network is sliced example/network slice Not available concept.Wherein, network slice example/network slice is available, it can be understood as, network is sliced example/network slice Effectively (valid).It is unavailable that network is sliced example/network slice, it can be understood as, it is invalid that network is sliced example/network slice. Hereinafter, illustrating that whether available the relevant network slice example of the PDU session provided in the embodiment of the present application/network slice is specific Implementation.

In one implementation, if it is related comprising a PDU session in the network slice example that an AMF network element is supported Network be sliced example, then the AMF network element supports the PDU session relevant network slice example, in this case, for the PDU For session, it is available which is sliced example；Otherwise, which does not support the relevant network slice example of the PDU session, In this case, it is unavailable that the network is sliced example for the PDU session.If in the network slice that an AMF network element is supported Comprising the relevant network slice of a PDU session, then the AMF network element supports the relevant network slice of the PDU session, the situation Under, for the PDU session, network slice is available；Otherwise, which does not support the relevant network of PDU session to cut Piece, in this case, network slice is unavailable for the PDU session.It should be noted that during specific implementation, It can first determine whether an AMF network element supports the relevant network slice of a PDU session, if not supporting, that is, can determine that the AMF The all-network slice example that network element does not support network slice to include does not support the relevant network slice of the PDU session real Example.If supporting, it may further determine that whether the AMF network element supports the relevant network slice example of the PDU session.

In another implementation, if coverage of the terminal out of a network slice example, network It determines for the terminal, it is unavailable which is sliced example.If the service area that a terminal is sliced out of a network Domain, then network determines for the terminal, and network slice is unavailable, meanwhile, the all-network that network slice includes is cut Piece example is unavailable.It should be noted that if terminal is in a network slice/network slice example coverage, then it is right Whether for the terminal, the network slice/network slice example not necessarily be can be used, specifically can be used and also believe with the registration of the terminal Breath, network demand (such as the demand of the load balancing of a certain network function network element, network are sliced the regulatory requirement etc. of example) etc. It is related.For example, if the quantity for the PDU session established based on the network slice example that AMF network element is supported is more, also, this A little PDU sessions are that different terminals are established, then the unavailable net of certain terminals can be arranged based on the demand of load balancing in network Network is sliced example.In this case, network determines for the terminal, it is unavailable which is sliced example.Similarly, it can be set Unavailable some or certain networks slice of terminal.For another example, if network is updating a certain network slice example or network slice When delay machine occurs in the network function network element that example includes, it is real that the unavailable network slice of certain terminals can be set in network Example.In this case, network determines for the terminal, it is unavailable which is sliced example.Similarly, terminal can be set can not It is sliced with some or certain networks.Certain the application is without being limited thereto.

In addition, network slice example/network is sliced unavailable may be embodied in: network side element (such as AMF network element, SMF Network element or (R) AN etc.) network slice example/network slice cannot be serviced；Alternatively, network determines that terminal cannot access the net Network is sliced example/network slice, establishes so that it is determined that the terminal cannot currently be sliced example/network slice by the network PDU session and/or terminal are sliced the PDU session that example is established by the network slice/network and need to discharge；Alternatively, network is true The service of the network slice/network slice example cannot be received by determining terminal.It is certainly not limited to this.Network slice/network slice is not Can with the reason of may be that the subscription data of service range or terminal that terminal removes network slice/network slice example changes Change or coverage change etc..By taking AMF network element as an example, network slice/network slice example may be in identical AMF network element Under unavailable (such as since the change of terminal unit contractual data causes network slice/network slice example unavailable), it is also possible to by It is unavailable (such as since the change of registration area causes network slice/network slice example unavailable) in the change of AMF network element.

Hereinafter, illustrating the scene that technical solution provided by the embodiments of the present application is applicable in:

Technical solution provided by the embodiments of the present application can be applied in the scene of SMF network element replacement, also can be applied to In the scene that SMF network element is changed without；It can be applied in the scene of AMF network element replacement, also can be applied to AMF network element and be changed without Scene in.

Wherein, the scene that the scene of AMF network element replacement and AMF network element are changed without, specifically may each be register flow path or cuts Change of current journey.In register flow path and switching flow, it is considered that the scene for being changed without AMF network element is to replace the field of AMF network element A kind of special circumstances of scape, it can think in the scene for being changed without AMF network element, after the AMF network element before replacement and replacement AMF network element is identical.Register flow path is the process triggered by terminal, and switching flow is the process triggered by (R) AN.It is implementing During, the scene that AMF network element is changed without can also be the process triggered by AMF network element.For example, AMF network element can be at least Determine that the relevant network slice example of PDU session that the terminal is established is unavailable according to the location information of terminal, and the PDU meeting It is available to talk about relevant network slice, to trigger the process for executing technical solution provided by the embodiments of the present application.Certain the application It is without being limited thereto.

Wherein, the scene that the scene of SMF network element replacement and SMF network element are changed without, specifically may each be register flow path or cuts Change of current journey or the above-mentioned process triggered by AMF network element.Also, in register flow path, switching flow and the process triggered by AMF network element In, it is considered that the scene for being changed without SMF network element is to replace a kind of special circumstances of the scene of SMF network element, it can think In the scene for being changed without SMF network element, the SMF network element before replacement is identical as the SMF network element after replacement.

Hereinafter, illustrating the method for PDU session rebuilding provided by the embodiments of the present application in conjunction with Fig. 1 to Fig. 3.It needs to illustrate It is that the name of each parameter is an example in the message name or message in the following embodiments of the application between each network element, It is also possible to other names in specific implementation, is described collectively herein, the embodiment of the present application is not especially limited this.

As shown in figure 4, being a kind of method of PDU session rebuilding provided by the embodiments of the present application.This method can be applied to In communication system as shown in Figure 1.This method may include steps of:

S101: the one AMF network element determines that the relevant network slice example of the first PDU session of terminal is unavailable, and first The relevant network slice of PDU session is available.

Wherein, the first PDU session can be any one currently-established PDU session of terminal.One terminal is currently The number of the PDU session of foundation can be one or more.

The present embodiment can be applied in the scene of SMF network element replacement, also can be applied to the scene that SMF network element is changed without In；It can be applied in the scene of AMF network element replacement, also can be applied in the scene that AMF network element is changed without.Specifically, can To be applied in register flow path, in switching flow, or in the process triggered by AMF network element.For example, if the present embodiment is applied to note In volume process, then the first AMF network element can be new AMF network element, be also possible to old AMF network element.For example, if the present embodiment is applied to In switching flow, then the first AMF network element can be target AMF network element, be also possible to source AMF network element.For example, if the present embodiment is answered In process for being triggered by AMF network element, then the first AMF network element is the AMF network element for triggering the process.About in each scene, How first AMF network element determines that the relevant network slice example of the first PDU session is unavailable, and the relevant net of the first PDU session Network slice is available, can be with reference to hereafter.

S102: the one AMF network element sends the second information to SMF network element.SMF network element receives the second information.Second information is used It is unavailable in the relevant network slice example of the first PDU session of instruction, and the relevant network slice of the first PDU session is available.

In the present embodiment, it is unavailable that the second information is used to indicate the first PDU session relevant network slice example, and first The relevant network slice of PDU session is available, it is believed that is: the second information is sent out according to the second information to terminal for SMF network element Send a kind of specific implementation of the first information；Specifically, the second information passes through the relevant network slice of the first PDU session of instruction Example is unavailable, and the relevant network slice of the first PDU session is available, to indicate that SMF network element sends the first information to terminal.

For example, the SMF network element can be old SMF network element if the present embodiment is applied in register flow path.For example, if originally Embodiment is applied in switching flow, then the SMF network element can be source SMF network element.For example, if the present embodiment is applied to by AMF In the process of network element triggering, then the SMF network element is properly termed as old SMF network element.About under above-mentioned each scene (or situation), first AMF network element, can be with reference to example in detail below how to SMF network element the second information of transmission.

The embodiment of the present application to the second information carry in which kind of message by the first AMF network element be sent to SMF network element not into Row limits.The message specifically can be a piece of news in the prior art, be also possible to a new message.

In the present embodiment, SMF network element receives the second information, to know the relevant network slice example of the first PDU session It is unavailable, and the relevant network slice of the first PDU session is available, it is believed that be: SMF network element determines that the first PDU session is related Network slice example it is unavailable, and the relevant network of the first PDU session is sliced a kind of available specific implementation.

S103:SMF network element sends the first information after receiving the second information, to the terminal.Terminal receives the first letter Breath.Wherein, the first information is used to indicate the terminal and initiates PDU session rebuilding process.It may include the first PDU meeting in the first information The identification information of words determines the PDU session for needing to rebuild with instruction terminal.

Optionally, the application is to the information type of the first information without limiting.For example, the information type can be request (request) or allow (allowed) etc..If the information type of the first information is request, the first letter that terminal receives Breath is a solicited message, and usual terminal can initiate PDU session rebuilding process after receiving the solicited message at once. If the information type of the first information is to allow, the first information that terminal receives is a permission information, and usual terminal can be with After receiving the permission information, according to own situation, decide whether to initiate PDU session rebuilding process.For example, if terminal is true The fixed subsequent business for needing not continue to the first PDU session of transmission and being carried, then can not initiate PDU session rebuilding process；If eventually End determines the subsequent business for also needing to continue the first PDU session of transmission and being carried, then can initiate PDU session rebuilding process.It needs It is noted that for the convenience of description, be illustrated by taking the request of the information type of the first information as an example, In This is described collectively, and hereafter repeats no more.

In general, the first information is first sent to AMF network element by SMF network element, then, AMF network element passes through (R) AN for the first information again It is sent to terminal.Wherein, about under any scene enumerated in S101 and/or S102, how SMF network element is sent out the first information Give how which AMF network element and the AMF network element can refer to the specific implementation etc. that terminal sends the first information Example in detail below.

Optionally, the first information that the embodiment of the present application sends SMF network element to AMF network element carry in which kind of message into The first information carrying that row transmission and AMF network element are sent to terminal is transmitted in which kind of message without limiting.Example Such as, which may each be a piece of news in the prior art, be also possible to a new message.

For example, SMF network element can carry the first information is sent to AMF network element, AMF net in PDU session release message The PDU session release message can be transmitted to terminal by member.Specifically, an original can be carried in PDU session release message Because of value, which can be used as the first information, is used to indicate reconstruction.

For example, no matter first information carrying is sent to AMF network element by SMF network element in which kind of message, AMF network element can be with The first information is carried and is sent to terminal in PDU session status message.Wherein, in this application, in PDU session status message It may include the status information of at least one PDU session of terminal, the status information instruction of any one PDU session exists, releases Put and rebuild one of them.If the status information of a PDU session indicates exist, which does not need to rebuild and does not need to release Put the PDU session.If the status information of a PDU session indicates release, which needs to discharge the PDU session.If one The status information of PDU session indicates to rebuild, then the terminal needs to rebuild the PDU session.It should be understood that such as about AMF network element What determines that terminal needs the specific implementation that there is or discharge a PDU session to have a detailed description in the prior art, this Place repeats no more.About AMF network element how to determine terminal need to rebuild a PDU session specific implementation can with reference to this Related content in application.

Optionally, SMF network element can send first to the terminal after receiving the second information, according to policy information Information.Wherein, which is used to indicate a strategy, and the policy content of the strategy is as follows: the relevant net of the first PDU session It is unavailable that network is sliced example, and the relevant network of the first PDU session is sliced when can be used, and initiates session rebuilding process.

On the one hand, the application is the strategy based on which kind of granularity without limiting to the strategy.For example, the strategy can be Based on the strategy of PDU session granularity, in this case, the strategy can be with the first PDU session have incidence relation (or mapping close System or corresponding relationship) a strategy.For example, the strategy can be the strategy based on PDU conversation group granularity, in this case, should Strategy can be a strategy for having incidence relation with a PDU conversation group comprising the first PDU session, wherein the application To how to determine the specific implementation of a PDU conversation group without limiting, theoretically, any one determines PDU conversation group Mode can be adapted for the application.For example, the strategy can be the strategy based on terminal granularity, in this case, the strategy The strategy that can be and there is incidence relation between the terminal.Certain the application is without being limited thereto.

On the other hand, how the application obtains the policy information without limiting, for example, the policy information to SMF network element It can be when carrying out network deployment, that is, be pre-stored in SMF network element local.For example, the policy information can be by PCF network element By signal deployment to SMF network element.Wherein, (SMF plan is specifically properly termed as to SMF network element configuration strategy about PCF network element Related procedure slightly) has had a detailed description in the prior art, and details are not described herein again.That is, it is believed that the application mentions It is tactful (i.e. strategy indicated by the policy information) that a kind of new SMF is proposed in the technical solution of confession, configures the new SMF plan Related procedure slightly can be with reference to the process for configuring other SMF strategy in the prior art, and certain the application is without being limited thereto.

S104: terminal initiates PDU session rebuilding process after receiving the first information.

Specifically, terminal can be after receiving the first information, determination needs to rebuild the first PDU session.It is then possible to According to the identification information of the currently-established PDU session of the terminal being locally stored relevant to PDU session network slice it Between corresponding relationship, determine the identification information of the first PDU session relevant network slice.Then, PDU meeting is sent to AMF network element Talk about reconstruction request message.Wherein, in different scenes, the AMF network element is different.For example, if the present embodiment is applied to register flow path In, then the AMF network element specifically can be new AMF network element.If the present embodiment is applied in switching flow, the AMF network element is specific It can be target AMF network element.The mark letter of the relevant network slice of the first PDU session is carried in PDU session rebuilding request message Breath.Subsequent, which can select new network to be sliced after receiving PDU session rebuilding request message for the terminal Example selects SMF network element further according to new network slice example.Follow-up process can be with reference to the PDU meeting provided in the prior art Words rebuild process, and details are not described herein again.Wherein, in different scenes, the selected SMF network element of example is sliced according to new network It is different.For example, selected SMF network element specifically can be new SMF network element if the present embodiment is applied in register flow path.Example Such as, if the present embodiment is applied in switching flow, selected SMF network element specifically can be target SMF network element.For example, if The present embodiment is applied in the process triggered due to AMF network element, then selected SMF network element specifically can be new SMF network element.

It is real in the relevant network slice of the first PDU session of terminal in the method for PDU session rebuilding provided in this embodiment Example is unavailable, and the relevant network of the first PDU session is sliced in available situation, and terminal can initiate PDU session rebuilding process. Wherein, which is used to rebuild a PDU session based on network slice.Due to for a terminal, Network is that the network slice of terminal selection is usually the network slice for being more conform with terminal current business transmission, because This, is sliced to rebuild a PDU session by the network, can ensure the performance of the transmission of the business to a certain extent.

As shown in figure 5, being a kind of method of PDU session rebuilding provided by the embodiments of the present application.This method can be applied to In communication system as shown in Figure 1.This method may include steps of:

S201: can refer to above-mentioned S101, and certain the application is without being limited thereto.

S202: the one AMF network element sends the second information to SMF network element.SMF network element receives the second information.Wherein, the second letter Breath sends the first information to terminal according to the second information for directly instruction SMF network element.

In the present embodiment, the second information sends the first information to terminal according to the second information for directly instruction SMF network element, May be considered: the second information is used to indicate a kind of specific reality that SMF network element sends the first information according to the second information to terminal Existing mode.The present embodiment and the difference of embodiment shown in Fig. 4 are that content indicated by the second information is different.

S203~S204: above-mentioned S103~S104 can be referred to.Certainly, the application is without being limited thereto.

It should be noted that in the present embodiment, since the second information directly indicates SMF network element according to the second information to terminal The first information is sent, therefore, whether SMF network element currently meets the relevant network slice example of the first PDU session without concern not It can use, and the relevant network slice of the first PDU session can use this condition.That is, during specific implementation, SMF Network element is not needed according to policy information described in embodiment shown in Fig. 4, sends the first information to terminal, but directly the The first information is sent to terminal under the instruction of two information.

The explanation of related content can be with reference to above in the present embodiment, and details are not described herein again.

The beneficial effect that technical solution provided in this embodiment can reach can be with reference to embodiment energy shown in figure 4 above The beneficial effect enough reached.In addition in the present embodiment, since the second information that the first AMF network element is sent to SMF network element directly refers to Show that SMF network element is sent according to the second information to terminal and is used to indicate the information for initiating PDU session rebuilding process.Therefore, Ke Yijian Change the treatment process of SMF network element.

As shown in fig. 6, being a kind of method of PDU session rebuilding provided by the embodiments of the present application.This method can be applied to In communication system as shown in Figure 1.This method may include steps of:

S301: the one AMF network element sends the 6th information to SMF network element.SMF network element receives the 6th information.6th information is used In the network slice and network slice example that indicate that the 2nd AMF network element is supported.For example, may include the 2nd AMF in the 6th information The identification information for the network slice that network element is supported and the identification information of network slice example.Certain the application is without being limited thereto.

The present embodiment can be applied in the scene of AMF network element replacement.In this scenario, SMF network element can be replaced, can also To be changed without.Such as in register flow path or switching flow.2nd AMF network element may be considered the AMF network element after replacement.First AMF network element may be the same or different with the 2nd AMF network element.It is specific:

When the present embodiment is applied in register flow path, if the first AMF network element is different from the 2nd AMF network element, the first AMF net Member specifically can be old AMF network element, and the 2nd AMF network element is new AMF network element.In this case, old AMF network element can determine itself Service cannot be provided for terminal (such as can communicate in new AMF network element with old AMF network element foundation, and the communication is about this When the communication of terminal, determine that itself cannot provide service for the terminal, certain the application is without being limited thereto), and obtain (such as hereafter Described in receive new AMF network element or NSSF network element sends) new AMF the network element identification information and network of network slice supported It is sliced after the identification information of example, sends the 6th information to SMF network element.If the first AMF network element is identical as the 2nd AMF network element, Then the first AMF network element and the 2nd AMF network element are new AMF network elements.In this case, new AMF network element can determine old AMF network element Service cannot be provided for terminal, and (such as the new AMF network element is communicated with old AMF network element foundation, and the communication is about the terminal Communication when, determine that old AMF network element cannot provide service for terminal, certain the application is without being limited thereto) when, through old AMF network element to The SMF network element sends the 6th information.

When the present embodiment is applied in switching flow, if the first AMF network element is different from the 2nd AMF network element, the first AMF net Member specifically can be source AMF network element, and the 2nd AMF network element is target AMF network element.In this case, source AMF network element can determine certainly Body cannot provide service for terminal, and obtain the identification information and network slice example of the network slice that target AMF network element is supported Identification information after, to SMF network element send the 6th information.If the first AMF network element is identical as the 2nd AMF network element, the first AMF Network element and the 2nd AMF network element are target AMF network elements.In this case, target AMF network element can determine that source AMF network element cannot When providing service for terminal, the 6th information is sent to the SMF network element through source AMF network element.

S302:SMF network element is not if it is determined that the 2nd AMF network element supports the relevant network slice of the first PDU session of terminal real Example, and support the relevant network slice of the first PDU session, it is determined that the relevant network slice example of the first PDU session is unavailable, And the first PDU session relevant network slice is available.

If the present embodiment is applied in register flow path, which specifically can be old SMF network element.If the present embodiment Applied in switching flow, then the SMF network element specifically can be source SMF network element.It should be understood that old SMF network element (or source SMF Network element) in the relevant network slice of each PDU session that can currently be established with maintenance terminal identification information and network slice The identification information of example.Therefore, when old SMF network element (or source SMF network element) receives the net for being used to indicate the 2nd AMF network element and supporting After the information of network slice and network slice example, it can determine whether the 2nd AMF network element supports the first PDU session phase of terminal The network of pass is sliced example, and, if support the relevant network slice of the first PDU session.

In the present embodiment, S302 may be considered SMF network element and determine that the relevant network slice example of the first PDU session can not With, and the relevant network of the first PDU session is sliced a kind of available specific implementation.If not considering subsequent S303~S305's Specific implementation, then the difference of the present embodiment and Fig. 4 and embodiment shown in fig. 5 is, SMF network element determines the first PDU session phase The network slice example of pass is unavailable, and the relevant network of the first PDU session is sliced available implementation difference.

S303~S304: above-mentioned S103~S104 can be referred to.Certain the application is without being limited thereto.

The beneficial effect that technical solution provided in this embodiment can reach can be reached with reference to embodiment shown in Fig. 4 The beneficial effect arrived.In addition in the present embodiment, by SMF network element receive be used to indicate the 2nd AMF network element support network slice and Network is sliced the information of example, so that it is determined that the relevant network slice example of the first PDU session is unavailable, and the first PDU session Relevant network slice is available, therefore, can simplify the treatment process of AMF network element.

Hereinafter, being from the scene that embodiment shown in Fig. 4 is changed without applied to the scene and SMF network element of the replacement of SMF network element Example, is illustrated the specific implementation process of embodiment shown in Fig. 4.Wherein, specifically, being on the basis of both scenes On, what the scene that the scene and AMF network element for being based respectively on the replacement of AMF network element are changed without was illustrated.More specifically, in each scene Under, it is based on being illustrated for register flow path and switching flow, also, under the scene that AMF network element is changed without, also respectively Based on being illustrated for the process triggered by AMF network element.

Scene one, the scene of SMF network element replacement

1), the scene of AMF network element replacement

As shown in fig. 7, being a kind of interaction schematic diagram of PDU session rebuilding method provided by the embodiments of the present application.This implementation Example is example when embodiment shown in Fig. 4 is applied to register flow path.Method shown in Fig. 7 may comprise steps of:

S401: terminal sends login request message to (R) AN.

S402:(R it after) AN receives login request message, executes AMF network element and selects process, to determine that this was registered Cheng Zhong provides the AMF network element (hereinafter referred to new AMF network element) of service for the terminal.

It should be understood that it is optional step that AMF network element, which selects process, in register flow path.The application is in which kind of feelings AMF network element selection process is executed under condition without restriction, such as can refer to the prior art.It is hereinafter with (R) AN execution It is illustrated for AMF network element selection process.

S403:(R) AN sends login request message to new AMF network element.

It should be understood that (R) AN can know terminal before executing this register flow path, whether which accessed it His AMF network element (i.e. old AMF network element).In the present embodiment, it is illustrated so that the terminal had accessed old AMF network element as an example, the feelings It can carry the identification information of old AMF network element under condition, in the login request message in S403, the address etc. of AMF network element as usual, from And new AMF is allowed to execute following S404 according to the identification information of old AMF network element.

S404: new AMF network element sends context transfer request message to old AMF network element.Wherein, context transfer request disappears Third information is carried in breath, third information is used to indicate the network slice that new AMF network element is supported and each network slice includes Network be sliced example.

For example, third information may include the identification information and these nets for carrying the network slice that new AMF network element is supported The identification information for the network slice example that each network slice in network slice includes.It should be noted that for third information Specifically which information, to realize the instruction function of third information, the application is without limiting.In principle, any can Realize that the information of this instruction function can be adapted for the application.

It should be understood that in general, in register flow path, when new AMF network element executes S404, in this case it is not apparent that terminal is currently established Therefore, in context transfer request message which PDU session can carry the all-network slice that new AMF network element is supported Each network in identification information and these networks slice is sliced the identification information of corresponding network slice example.Certainly originally Apply without being limited thereto.

It should be understood that in context transfer request message requesting terminal can be used for the identification information of carried terminal Contextual information.The identification information of terminal can be above-mentioned 5G temporary identifier.

It should be noted that in the present embodiment, be by taking third information carries in context transfer request message as an example into Row explanation, during specific implementation, third information can also be carried in one or more message, this one or more disappears Any bar message in breath may each be new information or message in the prior art.The application is to this without limiting.

S405: after old AMF network element receives context transfer request message, according to the current PDU session of terminal, and Third information determines that the relevant network slice example of the current one or more PDU sessions of terminal is unavailable, and this or more The relevant network slice of a PDU session is available.

As an example, if the identification information for the network slice example that new AMF network element is supported does not include a PDU session The identification information of relevant network slice example, it is determined that the relevant network slice example of the PDU session is unavailable.If new AMF The identification information for the network slice that network element is supported includes the identification information of the relevant network slice of the PDU session, it is determined that the PDU The relevant network slice of session is available.

It is exemplary, it is assumed that when executing S405, the current PDU session of terminal has 10, then after executing S405, meets " PDU Session relevant network slice example is unavailable, and the relevant network slice of the PDU session is available " the PDU session of this condition It some or all of can be in this 10 PDU sessions PDU session.About be unsatisfactory for this condition other PDU sessions how Processing, the application is without limiting.For example, the prior art can be referred to.

For each PDU session in one or more PDU sessions determining in S405, following S406 can be executed respectively ~S413.

S406: old AMF network element sends the second information to old SMF network element.Wherein, the second information is used to indicate the first PDU meeting It is unavailable to talk about relevant network slice example, and the relevant network slice of the first PDU session is available.First PDU session is S405 Any one PDU session in one or more PDU sessions of middle determination.

Wherein, it may include the identification information of the terminal in the second information, such as subscribe to persistent identifier (subscription permanent identifier, SUPI) etc..

It should be understood that old AMF network element can be before executing this register flow path, as the terminal chooses SMF net Member, i.e., old SMF network element, and safeguard the corresponding relationship between the identification information of the terminal and the identification information of old SMF network element, thus The identification information of old SMF network element can be determined, thereby executing S406 before executing S406.

S407: after old SMF network element receives the second information, determination needs to initiate PDU session rebuilding process.

For example, after old SMF network element receives the second information, can policy information in embodiment according to Fig.4, Determination needs to initiate PDU session rebuilding process, and certain the application is without being limited thereto.

S408: old SMF network element sends the first information to old AMF network element.Wherein, the first information is used to indicate terminal initiation PDU session rebuilding process.For example, the first information may include the identification information etc. of the first PDU session.

S409: after old AMF network element receives the first information, Xiang Xin AMF network element sends the first information.

S410: after new AMF network element receives the first information, the first information is sent to terminal.

In the present embodiment, since the subsequent AMF network element for providing service for the terminal is new AMF network element, new AMF network element is not propped up The network slice example (i.e. the relevant network slice example of the first PDU session) where old SMF network element is held, therefore, it is necessary to by new AMF network element sends the first information to the terminal.Due to old SMF network element cannot with new AMF network element direct communication, old SMF net Member can send the first information to new AMF network element through old AMF network element.

S411: after terminal receives the first information, Xiang Xin AMF network element sends PDU session rebuilding request message.Wherein, The identification information of the relevant network slice of the first PDU session is carried in PDU session rebuilding request message.

S412: after new AMF network element receives PDU session rebuilding request message, new network is selected to be sliced for the terminal Example.And new SMF network element is selected according to the new network slice example.The network slice example that new SMF network element supports this new.

The specific implementation that new AMF network element selects new network to be sliced example can refer to the prior art, herein no longer It repeats.

It should be noted that old AMF network element can have the ability of determining network slice example, in this case, in S405 In, old AMF network element can also determine the identification information of new network slice example, and the identification information of new network slice example can To be sent to new AMF network element by old AMF network element.In this case, when executing S412, it is new that new AMF network element does not need reselection Network be sliced example.

S413: it according to the identification information and new SMF network element of new network slice example, executes in PDU session rebuilding process Subsequent step.About the subsequent step in PDU session rebuilding process, have been described in the prior art, details are not described herein again.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

As shown in figure 8, being a kind of interaction schematic diagram of session rebuilding method provided by the embodiments of the present application.The present embodiment, Embodiment specifically shown in Fig. 4 is applied to another example when register flow path.Method shown in Fig. 8 the following steps are included:

S501~S503: can refer to above-mentioned S401~S403, and certain the application is without being limited thereto.

S504: new AMF network element sends context transfer request message to old AMF network element.

S505: after old AMF network element receives context transfer request message, Xiang Xin AMF network element sends context transfer Response message.Wherein, the 4th information is carried in context transfer response message, the 4th information is used to indicate current one of the terminal The relevant network of each PDU session in a or multiple PDU sessions is sliced network relevant with the PDU session and is sliced example.

For example, for any one PDU session in one or more PDU sessions current for terminal, the 4th information It may include that the identification information of PDU session, the identification information of the relevant network slice of the PDU session and the PDU session are related Network slice example identification information.Certainly which information is specifically included about the 4th information to realize the instruction of the 4th information Function, the application is without limiting.In principle, any information that can be realized this instruction function can be adapted for this Shen Please.

It should be noted that in the present embodiment, be by taking the 4th information carries in context transfer response message as an example into Row explanation, during specific implementation, the 4th information can also be carried in one or more message, this one or more disappears Any bar message in breath may each be new information or message in the prior art.The application is to this without limiting.

For any one PDU session in one or more PDU session, following S506 can be executed.

S506: after new AMF network element receives context transfer response message, according to the mark for the network slice itself supported The identification information and the 4th information for knowing information and network slice example, determine part in one or more PDU session or The relevant network slice example of whole PDU sessions is unavailable, and the relevant network slice of the part or all of PDU session is available. Specific implementation can be with reference to the associated description in above-mentioned S405.

For each PDU session in the part or all of PDU session determining in S506, can execute respectively following S507~S515.

S507: new AMF network element sends the second information to old AMF network element.Wherein, the second information is used to indicate the first PDU meeting It is unavailable to talk about relevant network slice example, and the relevant network slice of the first PDU session is available.Wherein, the first PDU session is Any one PDU session in S506 in some or all of determining PDU session.

S508: after old AMF network element receives the second information, the second information is sent to old SMF network element.

S509~S515: can refer to above-mentioned S407~S413, and certain the application is without being limited thereto.

It should be noted that new AMF network element can have the ability of determining network slice example, in this case, in S506 In/later, new AMF network element can also determine the identification information of new network slice example.In this case, S514 is being executed When, new AMF network element does not need the new network slice example of reselection.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

As shown in figure 9, being a kind of interaction schematic diagram of session rebuilding method provided by the embodiments of the present application.The present embodiment, Embodiment specifically shown in Fig. 4 is applied to example when switching flow.Method shown in Fig. 9 the following steps are included:

S601:(R) AN sends switching request to the AMF network element (i.e. source AMF network element) for currently providing service for the terminal and disappears Breath.It wherein, can be with the identification information of carried terminal in switching request message.

S602: after source AMF network element receives switching request message, AMF network element selection process is executed to determine target AMF Network element.Also, in the process, by carrying out information exchange with NRF network element, the current one or more PDU meetings of terminal are determined The relevant network slice example of each PDU session in words is unavailable, and the relevant network slice of the PDU session is available.Wherein, One or more PDU session some or all of can be in the current all PDU sessions of terminal.

It should be understood that NRF network element is for service discovery, the available network function text of maintenance and these network functions The service of support.For example, in this application, NRF network element can be used for safeguarding the identification information for the network slice that AMF network element is supported And each network in these networks slice is sliced the identification information for the network slice example for including.

As an example, AMF network element in source can send the title such as AMF net of target network functional network element to NRF network element Member, the type etc. of target network functional network element, NRF network element can select an AMF network element to make after receiving these information For target AMF network element, the identification information that the all-network that target AMF network element is supported is sliced then is sent to source AMF network element, and The identification information for the network slice example that each network slice in these networks slice includes.Source AMF network element receives these It, can be by determining whether target AMF network element supports this for any one PDU session current for terminal after information The relevant network of PDU session is sliced example, so that it is determined that whether the network slice example of the PDU session can be used, by determining mesh Mark AMF network element whether supports the relevant net slice of the PDU session so that it is determined that whether the network slice of the PDU session can be used.

It should be noted that being with source AMF network element during executing AMF network element selection process in S602, determination is eventually The relevant network slice example of each PDU session in the current one or more PDU sessions in end is unavailable, and the PDU session It is illustrated for relevant network slice is available, the application is without being limited thereto.For example, source AMF network element can also determine mesh After marking AMF network element, by carrying out information exchange between target AMF network element, the network to know that target AMF network element is supported is cut The identification information for the network slice example that the identification information of piece and each network slice include.

For each PDU session in one or more PDU session determining in S602, can execute respectively following S603~S610.

S603: source AMF network element sends the second information to source SMF network element.Wherein, the second information is in the first PDU session of instruction Relevant network slice example is unavailable, and the relevant network slice of the first PDU session is available.Wherein, the first PDU session is Any one the PDU session in one or more PDU sessions determined in S602.

S604: after source SMF network element receives the second information, determination needs to initiate PDU session rebuilding process.

For example, after source SMF network element receives the second information, can policy information in embodiment according to Fig.4, Determination needs to initiate PDU session rebuilding process, and certain the application is without being limited thereto.

S605: source SMF network element sends the first information to source AMF network element.Wherein, the first information is used to indicate terminal initiation PDU session rebuilding process, the first information include the identification information of the first PDU session.

S606: after source AMF network element receives the first information, the first information is sent to target AMF network element.

S607: after target AMF network element receives the first information, the first information is sent to terminal.

In the present embodiment, since the subsequent AMF network element for providing service for the terminal is target AMF network element, target AMF network element The network slice example (i.e. the relevant network slice example of the first PDU session) where the SMF network element of source is not supported, therefore, it is necessary to The first information is sent from target AMF network element to the terminal.Due to source SMF network element cannot with target AMF network element direct communication, because This, source SMF network element can send the first information to target AMF network element through source AMF network element.

S608: after terminal receives the first information, PDU session rebuilding request message is sent to target AMF network element.Its In, the identification information of the relevant network slice of the first PDU session is carried in PDU session rebuilding request message.

S609: after target AMF network element receives PDU session rebuilding request message, new network is selected to cut for the terminal Piece example (or being sliced example for target network).And example selection target SMF network element is sliced according to the new network.

It should be noted that source AMF network element can have the ability of determining network slice example, in this case, in S602 In, source AMF network element can also determine the identification information of new network slice example, and the identification information of new network slice example can To be sent to target AMF network element by source AMF network element.In this case, when executing S609, target AMF network element does not need to select again Select new network slice example.In addition, in another implementation, NRF network element can have determining network slice example Ability, in this case, can determine the identification information of new network slice example, new network slice with NRF network element in S602 The identification information of example can be sent to target AMF network element through source AMF network element by NRF network element.In this case, S609 is being executed When, target AMF network element does not need the new network slice example of reselection.Certain the application is without being limited thereto.

S610: it according to the mark and target SMF network element of new network slice example, executes in PDU session rebuilding process Subsequent step.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

It as shown in Figure 10, is a kind of interaction schematic diagram of session rebuilding method provided by the embodiments of the present application.The present embodiment, Embodiment specifically shown in Fig. 4 is applied to another example when switching flow.Method shown in Fig. 10 the following steps are included:

S701: can refer to above-mentioned S601, and certain the application is without being limited thereto.

S702: after source AMF network element receives switching request message, AMF network element selection process is executed to determine target AMF Network element.

S703: source AMF network element sends context message to target AMF network element.Wherein, the 4th letter is carried in context message Breath, the relevant network slice of each PDU session that the 4th information is used to indicate in the current one or more PDU sessions of terminal and The relevant network of the PDU session is sliced example.In addition, the contextual information of the terminal can be carried in context message.

S704: after target AMF network element receives context message, according to the identification information for the network slice itself supported With the identification information and the 4th information of network slice example, some or all of determine in one or more PDU session PDU session relevant network slice example is unavailable, and the relevant network slice of the part or all of PDU session is available.

For each PDU session in the part or all of PDU session determining in S704, can execute respectively following S705~S713.

S705: target AMF network element sends the second information to source AMF network element.Wherein, the second information is used to indicate the first PDU The relevant network slice example of session is unavailable, and the relevant network slice of the first PDU session is available.Wherein, the first PDU session It is any one PDU session in S704 in some or all of determining PDU session.

S706: after source AMF network element receives the second information, Xiang Yuan SMF network element sends the second information.

S707~S713: can refer to above-mentioned S604~S610, and certain the application is without being limited thereto.

It should be noted that target AMF network element can have the ability of determining network slice example, in this case, In In S704/later, target AMF network element can also determine the identification information of new network slice example.In this case, it is executing When S712, target AMF network element does not need the new network slice example of reselection.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

2), the scene that AMF network element is changed without

It may include: register flow path, switching flow and by AMF it should be noted that the scene that AMF network element is changed without The process of network element triggering.In this case, about embodiment shown in Fig. 4 be applied to register flow path in example can refer to it is above-mentioned Fig. 7~example shown in Fig. 8, it is possible to understand that, since AMF network element is changed without, that is to say, that the either figure in Fig. 7 and Fig. 8 Shown in new AMF network element and old AMF network element be same network element, therefore, do not needed between new AMF network element and old AMF network element into Row information interaction.The example being applied in switching flow about embodiment shown in Fig. 4 can be with reference to shown in above-mentioned Fig. 9~Figure 10 Example, it is possible to understand that, since AMF network element is changed without, that is to say, that mesh shown in the either figure in Fig. 9 and Figure 10 It marks AMF network element and source AMF network element is same network element, therefore, do not need to carry out information between target AMF network element and source AMF network element Interaction.Those skilled in the art should rationally can be inferred to AMF network element and be changed without without creative efforts Scene in, embodiment shown in Fig. 4 be applied to register flow path and switching flow in specific example, details are not described herein again.With Under, introduce specific example when embodiment shown in Fig. 4 is applied to the process triggered by AMF network element.

It as shown in figure 11, is a kind of interaction schematic diagram of PDU session rebuilding method provided by the embodiments of the present application.This implementation Example is example when embodiment shown in Fig. 4 is applied to the process triggered by AMF network element.Method shown in Figure 11 can wrap Include following steps:

S801:AMF network element is according to the location information of terminal, the service area of the relevant network slice example of the first PDU session The coverage in domain and the relevant network slice of the first PDU session determines that the relevant network slice example of the first PDU session can not With, and the relevant network slice of the first PDU session is available.

As an example, if the current position of terminal the relevant network slice example of the first PDU session service area Within domain, then the relevant network slice of the first PDU session is available, and otherwise, the relevant network slice example of the first PDU session can not With.If the current position of terminal is within the coverage of the relevant network slice of the first PDU session, the first PDU session phase The network slice of pass is available, and otherwise, the relevant network slice of the first PDU session is unavailable.

In addition, S801 could alternatively be following steps during specific implementation: AMF network element is believed according to the position of terminal The coverage of breath, the relevant network slice example of the first PDU session, and the mark letter of the network slice example after replacement Breath/coverage determines that the relevant network slice example of the first PDU session is available, and the relevant network slice of the first PDU session It is unavailable.It should be noted that in this case, AMF network element has the ability of the network slice example after determining replacement.AMF net Member belongs to consolidated network slice if it is determined that the network after replacement is sliced example network slice example relevant to the first PDU session, Then determine that the relevant network slice of the first PDU session is available, otherwise, it determines the relevant network slice of the first PDU session is unavailable. Wherein, AMF network element can be sliced the identification information of example by network and network is sliced the mark that network belonging to example is sliced Corresponding relationship between information, or network belonging to example is sliced by the coverage of network slice example and network and is sliced Coverage between corresponding relationship etc., to determine the network slice example network relevant to the first PDU session after replacement Slice example belongs to consolidated network slice.Certain the application is without being limited thereto.

S802:AMF network element sends the second information to old SMF network element.Wherein, the second information is used to indicate the first PDU session Relevant network slice example is unavailable, and the relevant network slice of the first PDU session is available.

S803: after old SMF network element receives the second information, determination needs to initiate PDU session rebuilding process.

S804: old SMF network element sends the first information to AMF network element.Wherein, the first information is used to indicate terminal and initiates PDU Session rebuilding process.

S805:AMF network element sends the first information to terminal.

S806: after terminal receives the first information, PDU session rebuilding request message is sent to AMF network element.Wherein, PDU The identification information of the relevant network slice of the first PDU session is carried in session rebuilding request message.

After S807:AMF network element receives PDU session rebuilding request message, new network is selected to be sliced for the terminal real Example.And new SMF network element is selected according to the new network slice example.The network slice example that new SMF network element supports this new.

S808: it according to the identification information and new SMF network element of new network slice example, executes in PDU session rebuilding process Subsequent step.About the subsequent step in PDU session rebuilding process, have been described in the prior art, details are not described herein again.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

It as shown in figure 12, is a kind of interaction schematic diagram of PDU session rebuilding method provided by the embodiments of the present application.This implementation Example is another example when embodiment shown in Fig. 4 is applied to the process triggered by AMF network element.Method shown in Figure 12 can be with The following steps are included:

S901:AMF network element is sliced the service area of example according to the location information of terminal and the relevant network of the first PDU session Domain determines that the relevant network slice example of the first PDU session is unavailable.

S902:AMF network element sends the 5th information to NSSF network element.Wherein, the 5th information is used to indicate the first PDU session phase The network slice example of pass is unavailable.

For example, the 5th information may include the identification information of the first PDU session, and instruction network slice example is unavailable Information etc..Optionally, the 5th information can also include the identification information of the relevant network slice example of the first PDU session.

After S903:NSSF network element receives the 5th information, the mark letter of available network slice example is sent to AMF network element Breath.AMF network element receives the identification information for the available network slice example that NSSF network element is sent；Wherein, available network is sliced example Network slice example relevant to the first PDU session belongs to consolidated network slice.

NSSF network element can be used for being sliced and determining for selecting network network slice selection assistance information etc..At this In application, NSSF network element can be sliced example for selecting network.In one implementation, NSSF network element can be according to existing Any functional network element for having technology to provide selects the mode of network slice example to select available network to be sliced example for the terminal, so The identification information of available network slice example is sent to AMF network element afterwards, determines that the available network is sliced example by AMF network element Whether network slice relevant to the first PDU session belongs to consolidated network slice.In another implementation, if the 5th information Identification information including the relevant network slice example of the first PDU session, then NSSF network element can directly select and the first PDU meeting It talks about the network that relevant network slice example belongs to consolidated network slice and is sliced example as available network slice example, so The identification information that available network slice is implemented is sent to AMF network element afterwards.

S904~S910: can refer to above-mentioned S802~S808, and certain the application is without being limited thereto.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

The scene that scene two, SMF network element are changed without

1), the scene of AMF network element replacement

It as shown in figure 13, is a kind of interaction schematic diagram of session rebuilding method provided by the embodiments of the present application.The present embodiment, Embodiment specifically shown in Fig. 4 is applied to example when register flow path.Method shown in Figure 13 the following steps are included:

S1001~S1005: can refer to above-mentioned S401~S405, and certain the application is without being limited thereto.

For each PDU session in one or more PDU sessions determining in S1005, can execute respectively following S1006~S1012.

S1006: old AMF network element sends the identification information of the second information and new AMF network element to SMF network element.Wherein, second It is unavailable that information is used to indicate the relevant network slice example of the first PDU session, and the relevant network slice of the first PDU session can With.First PDU session is any one PDU session in the one or more PDU sessions determined in S1005.

Old AMF network element sends the identification information of new AMF network element to SMF network element, in order to which SMF network element can know new AMF Network element, so as to execute following S1008.The identification information of new AMF network element can be the address etc. of new AMF network element.Second letter The identification information of breath and new AMF network element, which can be carried, is sent to SMF network element by old AMF network element in same message, can also take Band is sent to SMF network element by old AMF network element in different messages, and the application is to this without limiting.

It should be understood that old AMF network element can be before executing this register flow path, as the terminal chooses SMF net Member, and safeguard the corresponding relationship between the identification information of the terminal and the identification information of the SMF network element, so as to execute Before S1006, the identification information of SMF network element is determined, thereby executing S1006.

After S1007:SMF network element receives the second information, determination needs to initiate PDU session rebuilding process.

S1008:SMF network element sends the first information to new AMF network element.Wherein, the first information is used to indicate terminal and initiates PDU Session rebuilding process.

It should be noted that old AMF network element has sent the mark letter of new AMF network element to SMF network element due in S1006 Breath, therefore, SMF network element can find new AMF network element according to the identification information of new AMF network element, thereby executing in S1008 to new AMF network element sends the first information, can save the forwarding process of the first information in this way.In addition, during specific implementation, if SMF network element cannot find new AMF network element according to the identification information of new AMF network element, then SMF network element can first be sent out to old AMF network element The first information is sent, then sends the first information from old AMF network element to new AMF network element.In addition, in another implementation, In In S1006, old AMF network element can not also send the identification information of new AMF network element to SMF network element, in this case, in S1008, SMF network element first can send the first information to old AMF network element, then send the first information from old AMF network element to new AMF network element. Certain the application is without being limited thereto.

S1009: after new AMF network element receives the first information, the first information is sent to terminal.

S1010: after terminal receives the first information, Xiang Xin AMF network element sends PDU session rebuilding request message.Wherein, The identification information of the relevant network slice of the first PDU session is carried in PDU session rebuilding request message, and is used to indicate SMF The constant information of network element.The application to be used to indicate the constant specific implementation of SMF network element without limit.

S1011: after new AMF network element receives PDU session rebuilding request message, using the SMF network element as new SMF net Member, and in the network slice example that the new SMF network element is supported, select new network to be sliced example for the terminal.

S1012: it according to the identification information and new SMF network element of new network slice example, executes in PDU session rebuilding process Subsequent step.About the subsequent step in PDU session rebuilding process, have been described in the prior art, details are not described herein again.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

It as shown in figure 14, is a kind of interaction schematic diagram of session rebuilding method provided by the embodiments of the present application.The present embodiment, Embodiment specifically shown in Fig. 4 is applied to another example when register flow path.Method shown in Figure 14 the following steps are included:

S1101~S1103: can refer to above-mentioned S401~S403, and certain the application is without being limited thereto.

S1104: new AMF network element sends context transfer request message to old AMF network element.

S1105: after old AMF network element receives context transfer request message, Xiang Xin AMF network element sends context transfer Response message.Wherein, the identification information of the 4th information and SMF network element, the 4th information are carried in context transfer response message The relevant network slice of each PDU session being used to indicate in the current one or more PDU sessions of the terminal and the PDU session Relevant network is sliced example.

Old AMF network element sends the identification information of SMF network element to new AMF network element, in order to which new AMF network element can know SMF Network element, so as to execute following S1107.The identification information of SMF network element can be the address etc. of SMF network element.4th information and The identification information of SMF network element, which can be carried, is sent to new AMF network element by old AMF network element in same message, can also carry New AMF network element is sent to by old AMF network element in different messages, the application is to this without limiting.

For any one PDU session in one or more PDU session, following S1106 can be executed.

S1106: after new AMF network element receives context transfer response message, according to the network slice itself supported The identification information and the 4th information of identification information and network slice example, determine the part in one or more PDU session Or whole PDU session relevant network slice example is unavailable, and the relevant network slice of the part or all of PDU session can With.

For each PDU session in the part or all of PDU session determining in S1106, can execute respectively following S1107~S1113.

S1107: new AMF network element sends the second information to SMF network element.Wherein, the second information is used to indicate the first PDU session Relevant network slice example is unavailable, and the relevant network slice of the first PDU session is available.Wherein, the first PDU session is Any one PDU session in S1106 in some or all of determining PDU session.

It should be noted that due to AMF network element old in S1105 to new AMF network element have sent SMF network element mark letter Breath, therefore, new AMF network element can find the SMF network element according to the identification information of SMF network element, thereby executing in S1107 to SMF network element sends the second information, can save the forwarding process of the second information in this way.In addition, during specific implementation, if New AMF network element can not find the SMF network element according to the identification information of SMF network element, then new AMF network element can first be sent out to old AMF network element The second information is sent, then sends the second information from old AMF network element to the AMF network element.In addition, in another implementation, In In S1105, old AMF network element can not also send the identification information of SMF network element to new AMF network element, in this case, in S1107, New AMF network element first can send the second information to old AMF network element, then send the second letter from old AMF network element to the AMF network element Breath.Certain the application is without being limited thereto.

After S1108:SMF network element receives the second information, determination needs to initiate PDU session rebuilding process.

S1109:SMF network element sends the first information to new AMF network element.Wherein, the first information is used to indicate terminal and initiates PDU Session rebuilding process.For example, the first information may include the identification information of the terminal.

Since in S1107, SMF network element and new AMF network element had had information exchange, and therefore, SMF network element can be known The identification information of new AMF network element sends the first information to new AMF network element thereby executing in S1109.

S1110~S1113: can refer to above-mentioned S1009~S1012, and certain the application is without being limited thereto.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

It as shown in figure 15, is a kind of interaction schematic diagram of session rebuilding method provided by the embodiments of the present application.The present embodiment, Embodiment specifically shown in Fig. 4 is applied to example when switching flow.Method shown in figure 15 the following steps are included:

S1201~S1202: can refer to above-mentioned S601~S602, and certain the application is without being limited thereto.

For each PDU session in one or more PDU session determining in S1202, can execute respectively following S1203~S1209.

S1203: source AMF network element sends the identification information of the second information and target AMF network element to SMF network element.Wherein, Two information are unavailable in the relevant network slice example of the first PDU session of instruction, and the relevant network slice of the first PDU session can With.First PDU session is any one PDU session in the one or more PDU sessions determined in S1202.

After S1204:SMF network element receives the second information, determination needs to initiate PDU session rebuilding process.

S1205:SMF network element sends the first information to target AMF network element.Wherein, the first information is used to indicate terminal initiation PDU session rebuilding process.

S1206: after target AMF network element receives the first information, the first information is sent to terminal.

S1207: after terminal receives the first information, PDU session rebuilding request message is sent to target AMF network element.Its In, the identification information of the relevant network slice of the first PDU session is carried in PDU session rebuilding request message, and be used to indicate The constant information of SMF network element.The application to be used to indicate the constant specific implementation of SMF network element without limit.

S1208: after target AMF network element receives PDU session rebuilding request message, using the SMF network element as new SMF net Member, and in the network slice example that the new SMF network element is supported, select new network to be sliced example for the terminal.

S1209: it according to the identification information and new SMF network element of new network slice example, executes in PDU session rebuilding process Subsequent step.About the subsequent step in PDU session rebuilding process, have been described in the prior art, details are not described herein again.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

It as shown in figure 16, is a kind of interaction schematic diagram of session rebuilding method provided by the embodiments of the present application.The present embodiment, Embodiment specifically shown in Fig. 4 is applied to another example when switching flow.Method shown in Figure 16 the following steps are included:

S1301~S1302: can refer to above-mentioned S701~S702, and certain the application is without being limited thereto.

S1303: source AMF network element sends context message to target AMF network element.Wherein, the 4th is carried in context message The identification information of information and SMF network element, the 4th information are used to indicate current each of the one or more PDU sessions of terminal The relevant network of PDU session is sliced network relevant with the PDU session and is sliced example.In addition, can be carried in context message The contextual information of the terminal.

S1304: after target AMF network element receives context message, believed according to the mark for the network slice itself supported Some or all of the identification information and the 4th information of breath and network slice example, determine in one or more PDU session PDU session relevant network slice example is unavailable, and the relevant network slice of the part or all of PDU session is available.

For each PDU session in the part or all of PDU session determining in S1304, can execute respectively following S1305~S1311.

S1305: target AMF network element sends the second information to SMF network element.Wherein, the second information is used to indicate the first PDU meeting It is unavailable to talk about relevant network slice example, and the relevant network slice of the first PDU session is available.Wherein, the first PDU session is Any one PDU session in S1304 in some or all of determining PDU session.

S1306~S1311: can refer to above-mentioned S1204~S1209, and certain the application is without being limited thereto.

The explanation of related content and beneficial effect can be no longer superfluous herein with reference to corresponding embodiment above in the present embodiment It states.

2), the scene that AMF network element is changed without

It may include: register flow path, switching flow and by AMF it should be noted that the scene that AMF network element is changed without The process of network element triggering.In this case: about embodiment shown in Fig. 4 be applied to register flow path in example can refer to it is above-mentioned Example shown in Figure 13~Figure 14, it is possible to understand that, since AMF network element is changed without, that is to say, that any in Figure 13 and Figure 14 New AMF network element shown in the drawings and old AMF network element are same network elements, therefore, are not required between new AMF network element and old AMF network element Carry out information exchange.Above-mentioned Figure 15~figure can be referred to by being applied to the example in switching flow about embodiment shown in Fig. 4 Example shown in 16, it is possible to understand that, since AMF network element is changed without, that is to say, that institute in the either figure in Figure 15 and Figure 16 The target AMF network element and source AMF network element shown is same network element, therefore, do not needed between target AMF network element and source AMF network element into Row information interaction.The process for being applied to be triggered by AMF network element about embodiment shown in Fig. 4 can refer to above-mentioned Figure 11~Figure 12 Shown in example, it is possible to understand that, since AMF network element is changed without, that is to say, that shown in the either figure in Figure 11 and Figure 12 New SMF network element and old SMF network element be same network element, therefore do not need to carry out information friendship between new SMF network element and old SMF network element Mutually.Those skilled in the art should rationally can be inferred to what AMF network element was changed without without creative efforts In scene, embodiment shown in Fig. 4 is applied to specific in register flow path, switching flow and the process that is triggered by AMF network element Example, details are not described herein again.

It is above-mentioned that mainly scheme provided by the embodiments of the present application is described from the angle of method.In order to realize above-mentioned function Can, it comprises execute the corresponding hardware configuration of each function and/or software module.Those skilled in the art should be easy to anticipate Know, unit and algorithm steps described in conjunction with the examples disclosed in the embodiments of the present disclosure, the application can with hardware or The combining form of hardware and computer software is realized.Some function is actually with the side of hardware or computer software driving hardware Formula executes, specific application and design constraint depending on technical solution.Professional technician can be to each specific Using using different methods to achieve the described function, but this realize it is not considered that exceeding scope of the present application.

The embodiment of the present application can be according to above method example to device (including the PCF network element, first of the strategy of configuration UE Network element and UE etc.), alternatively, determining that the device (including UDR network element or the first AMF network element etc.) of PCF network element carries out functional module It divides, for example, each functional module of each function division can be corresponded to, two or more functions can also be integrated in In one processing module.Above-mentioned integrated module both can take the form of hardware realization, can also use software function module Form realize.It should be noted that being schematical, only a kind of logic function to the division of module in the embodiment of the present application It can divide, there may be another division manner in actual implementation.

It as shown in figure 17, is a kind of structural schematic diagram of SMF network element provided by the embodiments of the present application.SMF shown in Figure 17 Network element 17 can be used for executing the step of corresponding SMF network element executes in any session rebuilding method provided above.The SMF net Member 17 may include: transmission unit 1701, unavailable for the relevant network slice example of the first PDU session when terminal, and When the relevant network slice of first PDU session is available, the first information is sent to terminal；The first information is used to indicate terminal initiation PDU session rebuilding process.For example, SMF network element 17 can be the SMF network element in Fig. 4~Fig. 6 in conjunction with Fig. 4~Fig. 6.Transmission unit 1701 can be used for executing the S103 in Fig. 4, perhaps for executing S203 in Fig. 5 or for executing the S303 in Fig. 6. Such as SMF network element 17 can be the old SMF network element in Fig. 7,8,11,12.For example, SMF network element 17 can be Fig. 9, the source in 10 SMF network element.Such as SMF network element 17 can be the SMF network element in Figure 13~16.

Optionally, SMF network element 17 can also include: receiving unit 1702, for receiving the second of the transmission of the first AMF network element Information；Second information is used to indicate: the relevant network slice example of the first PDU session is unavailable, and the first PDU session is relevant Network slice is available.For example, the first AMF network element can be old AMF network element in conjunction with Fig. 7, receiving unit 1702 can be used for executing Receiving step in S406.For example, the first AMF network element can be new AMF network element in conjunction with Fig. 8, receiving unit 1702 can be used for Execute the receiving step in S508.For example, in conjunction with Fig. 9, the first AMF network element can be source AMF network element, and receiving unit 1702 can be with For executing the receiving step in S603.For example, the first AMF network element can be target AMF network element, receiving unit in conjunction with Figure 10 1702 can be used for executing the receiving step in S706.

Optionally, receiving unit 1702 specifically can be used for, and receive that the first AMF network element is sent through the 2nd AMF network element Two information.Wherein, in register flow path, the 2nd AMF network element is old AMF network element, and the first AMF network element is new AMF network element, for example, It may refer to example shown in Fig. 8.Alternatively, the 2nd AMF network element is source AMF network element in switching flow, the first AMF network element is Target AMF network element, for example, example shown in Fig. 10 can be referred to.First AMF network element does not support the relevant network of the first PDU to cut Piece example.

Optionally, transmission unit 1701 specifically can be used for, and send through the 3rd AMF network element and the 4th AMF network element to terminal The first information；Wherein, in register flow path, the 3rd AMF network element is old AMF network element, and the 4th AMF network element is new AMF network element, example Such as, Fig. 7 or example shown in Fig. 8 can be referred to；Alternatively, in switching flow, the 3rd AMF network element is source AMF network element, the 4th AMF network element is target AMF network element, for example, Fig. 9 or example shown in Fig. 10 can be referred to.4th AMF network element does not support first The relevant network of PDU session is sliced example.

Optionally, transmission unit 1701 specifically can be used for, and send the first letter to the 4th AMF network element through the 3rd AMF network element Breath；First information carrying is sent to terminal by the 4th AMF network element in PDU session status message；PDU session status message package It includes: the status information of at least one PDU session of terminal；One of state that status information instruction exists, discharges and rebuilds； At least one PDU session includes the first PDU session, and the status information of the first PDU session indicates to rebuild.

Optionally, transmission unit 1701 specifically can be used for, and according to policy information, send the first information to terminal；Strategy Information is used to indicate: the relevant network slice example of the first PDU session is unavailable, and the relevant network slice of the first PDU session When available, the strategy of PDU session rebuilding process is initiated.Optionally, policy information is stored in advance in SMF network element 17 locally, or SMF network element 17 is sent to by policy control functions PCF network element.

It as shown in figure 18, is a kind of structural schematic diagram of first AMF network element provided by the embodiments of the present application.Shown in Figure 18 First AMF network element 18 can be used for executing the step of corresponding AMF network element executes in any session rebuilding method provided above. First AMF network element 18 may include: transmission unit 1801, can be used for when the relevant network slice of the first PDU session of terminal Example is unavailable, and the relevant network of the first PDU session is sliced when can be used, and sends the second information to SMF network element；Second information is used The first information is sent to terminal in SMF network element, the first information is used to indicate terminal and initiates PDU session rebuilding process.For example, in conjunction with Fig. 4 or Fig. 5, the first AMF network element 18 can be the first AMF network element in Fig. 4 or Fig. 5.In conjunction with Fig. 4, transmission unit 1801 can be with For executing the sending step in the S102 in Fig. 4.In conjunction with Fig. 5, transmission unit 1801 can be used for executing in the S202 in Fig. 5 Sending step.For example, the first AMF network element 18 can be old AMF network element in conjunction with Fig. 7, transmission unit 1801 can be used for executing Sending step in S406.For example, the first AMF network element 18 can be new AMF network element in conjunction with Fig. 8.In conjunction with Fig. 9, the first AMF net Member can be source AMF network element.In conjunction with Figure 10, the first AMF network element can be target AMF network element.

Optionally, the first AMF network element 18 can also include: receiving unit 1802 and processing unit 1803.

Optionally, receiving unit 1802 can be used for receiving the third information that the 2nd AMF network element or NRF network element are sent；Its In, third information is used to indicate the network slice example and network slice of the 2nd AMF network element support；In register flow path, first AMF network element 18 is old AMF network element, and the 2nd AMF network element is new AMF network element, such as can refer to example shown in Fig. 7.Alternatively, In In switching flow, the first AMF network element 18 is source AMF network element, and the 2nd AMF network element is target AMF network element, such as can refer to Fig. 9 Shown in example.Processing unit 1803 can be used for according to third information, however, it is determined that the 2nd AMF network element does not support the first PDU meeting Relevant network slice example is talked about, and supports the relevant network slice of the first PDU session, it is determined that the first PDU session is relevant It is unavailable that network is sliced example, and the relevant network slice of the first PDU session is available.For example, in conjunction with Fig. 7, receiving unit 1802 It can be used for executing the receiving step in S404, processing unit 1803 can be used for executing S405.

Optionally, receiving unit 1802 can be used for receiving the 4th information that the 2nd AMF network element or NRF network element are sent；Its In, the 4th information is used to indicate the relevant network slice example of the first PDU session and network slice；In register flow path, first AMF network element 18 is new AMF network element, and the 2nd AMF network element is old AMF network element, for example, example shown in Fig. 8 can be referred to.Alternatively, In switching flow, the first AMF network element 18 is target AMF network element, and the 2nd AMF network element is source AMF network element, for example, can refer to Example shown in Fig. 10.Processing unit 1803 can be used for, according to the 4th information, however, it is determined that the first AMF network element 18 does not support The relevant network of one PDU session is sliced example, and supports the relevant network slice of the first PDU session, it is determined that the first PDU The relevant network slice example of session is unavailable, and the relevant network slice of the first PDU session is available.For example, in conjunction with Fig. 8 Shown in example, receiving unit 1802 can be used for executing the receiving step in S505, and processing unit 1803 can be used for executing S506。

Optionally, processing unit 1803 can be used for, according to the location information of terminal, the relevant network of the first PDU session It is sliced the coverage of example and the coverage of the relevant network slice of the first PDU session, determines the first PDU session phase The network slice example of pass is unavailable, and the relevant network slice of the first PDU session is available.

Optionally, transmission unit 1801 is also used to, and sends the 5th information to NSSF network element；Wherein, the 5th information is for referring to Show that the relevant network slice example of the first PDU session is unavailable, and instruction NSSF network element can use net to the transmission of the first AMF network element 18 The identification information of network slice example.Receiving unit 1802 can be used for receiving the available network slice example of NSSF network element transmission Identification information；Wherein, available network slice example network slice example relevant to the first PDU session belongs to consolidated network and cuts Piece.For example, the example in conjunction with shown in Figure 12, in this case, the first AMF network element 18 can be the AMF network element in Fig. 2.It sends single Member 1801 can be used for executing the sending step in S902.Receiving unit 1802 can be used for executing the receiving step in S903.

It as shown in figure 19, is a kind of structural schematic diagram of terminal installation provided by the embodiments of the present application.Shown in Figure 19 eventually End device 19 can be used for executing the step of corresponding terminal executes in any session rebuilding method provided above.Terminal installation 19 may include: receiving unit 1901 and processing unit 1902.

In a kind of possible example, receiving unit 1901 can be used for receiving the first information from SMF network element；Its In, the relevant network slice example of the first PDU session of terminal installation 19 is unavailable, and the relevant network of the first PDU session is cut Piece is available；The first information is used to indicate terminal installation 19 and initiates PDU session rebuilding process.Processing unit 1902, can be used for After receiving unit 1901 receives the first information, PDU session rebuilding process is initiated.For example, in conjunction with Fig. 4~Fig. 6, terminal dress Setting 19 can be terminal in Fig. 4~Fig. 6.Receiving unit 1901 can be used for executing the receiving step in the S103 in Fig. 4, or The receiving step in the S193 in Fig. 5 is executed, or executes the receiving step in the S303 in Fig. 6.It is corresponding, processing unit 1902 It can be used for executing the S104 in Fig. 4, or execute the S194 in Fig. 5, or execute the S304 in Fig. 6.

Optionally, processing unit 1902 specifically can be used for, if the information type of the first information is to allow, in terminal 19 When determination needs to initiate PDU session rebuilding process, PDU session rebuilding process is initiated.

In a kind of possible example, receiving unit 1901 can be used for receiving the PDU session status of AMF network element transmission Message；Wherein, PDU session status message includes: the status information of at least one PDU session of terminal installation 19；Status information One of instruction presence, release and reconstruction state；At least one PDU session includes the first PDU session, the first PDU session Status information instruction is rebuild；AMF network element sends PDU after the first information for receiving the transmission of SMF network element, to terminal installation 19 Session status message；The first information is used to indicate terminal installation 19 and initiates PDU session rebuilding process；SMF network element is determining first The relevant network slice example of PDU session is unavailable, and the relevant network of the first PDU session is sliced when can be used, to terminal installation 19 send the first information.Processing unit 1902 can be used for after receiving unit 1901 receives the first information, initiate PDU Session rebuilding process.

The embodiment of the present application also provides a kind of structural schematic diagrams of communication equipment 2000.The communication equipment 2000 can wrap It includes: at least one processor 2001, communication line 2002, memory 2003 and at least one communication interface 2004.The communication Equipment 2000 specifically can be any SMF network element (such as SMF17) provided above, the first AMF network element (such as the first AMF network element Or terminal (such as terminal installation 19) 18).For example, any in conjunction with Figure 17~Figure 19, transmission unit and receiving unit can be figure Communication interface 2004 in 20, processing unit can be with the processors 2001 or processor 2007 in corresponding diagram 20.

Processor 2001 can be a general central processor (central processing unit, CPU), micro- place Manage device, application-specific integrated circuit (application-specific integrated circuit, ASIC) or one or Multiple integrated circuits executed for controlling application scheme program.

Communication line 2002 may include an access, and information is transmitted between said modules.

Communication interface 2004, using the device of any transceiver one kind, for other equipment or communication, such as Ethernet, RAN, WLAN (wireless local area networks, WLAN) etc..

Memory 2003 can be read-only memory (read-only memory, ROM) or can store static information and refer to The other kinds of static storage device enabled, random access memory (random access memory, RAM) or can store The other kinds of dynamic memory of information and instruction, is also possible to Electrically Erasable Programmable Read-Only Memory (electrically erasable programmable read-only memory, EEPROM), CD-ROM (compact Disc read-only memory, CD-ROM) or other optical disc storages, optical disc storage (including compression optical disc, laser disc, light Dish, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium or other magnetic storage apparatus or can be used in carry or Store have instruction or data structure form desired program code and can by any other medium of computer access, but It is without being limited thereto.Memory, which can be, to be individually present, and is connected by communication line 2002 with processor.Memory can also and be located Reason device integrates.

Wherein, memory 2003 is used to store the computer executed instructions for executing application scheme, and by processor 2001 It is executed to control.Processor 2001 is for executing the computer executed instructions stored in memory 2003, to realize the application The method that following embodiments provide.

Optionally, the computer executed instructions in the embodiment of the present application can also be referred to as application code, the application Embodiment is not especially limited this.

In the concrete realization, as one embodiment, processor 2001 may include one or more CPU, such as in Fig. 2 CPU0 and CPU1.

In the concrete realization, as one embodiment, communication equipment 2000 may include multiple processors, such as in Fig. 2 Processor 2001 and processor 2007.Each of these processors can be monokaryon (single-CPU) processing Device is also possible to multicore (multi-CPU) processor.Here processor can refer to one or more equipment, circuit, And/or the processing core for handling data (such as computer program instructions).

In the concrete realization, as one embodiment, communication equipment 2000 can also include output equipment 2005 and input Equipment 2006.Output equipment 2005 and processor 2001 communicate, and can show information in many ways.For example, output equipment 2005 can be liquid crystal display (liquid crystal display, LCD), Light-Emitting Diode (light emitting Diode, LED) display equipment, cathode-ray tube (cathode ray tube, CRT) display equipment or projector (projector) etc..Input equipment 2006 and processor 2001 communicate, and can receive the input of user in many ways.For example, Input equipment 2006 can be mouse, keyboard, touch panel device or sensing equipment etc..

Above-mentioned communication equipment 2000 can be a common apparatus either special equipment.In the concrete realization, Communication equipment 2000 can be desktop computer, portable computer, network server, palm PC (personal digital Assistant, PDA), cell phone, tablet computer, wireless terminal device, embedded device or have setting for similar structures in Fig. 2 It is standby.The embodiment of the present application does not limit the type of communication equipment 2000.

The embodiment of the present application also provides a kind of session rebuilding systems.The system may include: SMF network element and terminal.Its In: SMF network element is used for, and when the first PDU session of terminal relevant network slice example is unavailable, and the first PDU session is related Network slice it is available when, send the first information to terminal；The first information is used to indicate terminal and initiates PDU session rebuilding process. Terminal is used for, and receives the first information, and initiate PDU session rebuilding process.

Optionally, which can also include the first AMF network element.First AMF network element is used for, and determines the first PDU session phase The network slice example of pass is unavailable, and the relevant network slice of the first PDU session is available；And the second letter is sent to SMF network element Breath；Second information sends the first information to terminal according to the second information for SMF network element.SMF network element is also used to receive the first AMF The second information that network element is sent.

Optionally, which can also include the 2nd AMF network element.SMF network element, for receiving the transmission of the first AMF network element Second information may include: SMF network element, for receiving the second information that the first AMF network element is sent through the 2nd AMF network element；Its In, in register flow path, the 2nd AMF network element is old AMF network element, and the first AMF network element is new AMF network element；Alternatively, in switching flow In, the 2nd AMF network element is source AMF network element, and the first AMF network element is target AMF network element；First AMF network element does not support the first PDU phase The network of pass is sliced example.

Optionally, which can also include: the 3rd AMF network element and the 4th AMF network element.SMF network element is also used to, to terminal The first information is sent, may include: that SMF network element is also used to, sends first to terminal through the 3rd AMF network element and the 4th AMF network element Information；Wherein, in register flow path, the 3rd AMF network element is old AMF network element, and the 4th AMF network element is new AMF network element；Alternatively, In In switching flow, the 3rd AMF network element is source AMF network element, and the 4th AMF network element is target AMF network element；4th AMF network element is not supported The relevant network of first PDU session is sliced example.

Optionally, SMF network element is also used to, and sends the first information to terminal through the 3rd AMF network element and the 4th AMF network element, can To include: that SMF network element is also used to, the first information is sent to the 4th AMF network element through the 3rd AMF network element；The first information is carried in PDU Terminal is sent to by the 4th AMF network element in session status message；PDU session status message includes: at least one PDU meeting of terminal The status information of words；Status information includes one of state for existing, discharging and rebuilding；At least one PDU session includes the One PDU session, the status information of the first PDU session indicate to rebuild.Terminal is used for, and receives the first information from SMF network element, can To include: that terminal is used for, the PDU session status message that the 4th AMF network element is sent is received.

Optionally, SMF network element is also used to, and is sent the first information to terminal, be may include: that SMF network element is also used to, according to plan Slightly information sends the first information to terminal；Policy information is used to indicate: the relevant network slice example of the first PDU session can not With, and the relevant network of the first PDU session is sliced when can be used, and initiates the strategy of PDU session rebuilding process.

Optionally, it is local to be stored in advance in SMF network element for policy information, or is sent to SMF network element by PCF network element.

Optionally, which can also include: the 2nd AMF network element or NRF network element.2nd AMF network element or NRF network element are used In to the first AMF network element transmission third information；Wherein, third information is used to indicate the network slice of the 2nd AMF network element support in fact Example and network slice；In register flow path, the first AMF network element is old AMF network element, and the 2nd AMF network element is new AMF network element；Alternatively, In switching flow, the first AMF network element is source AMF network element, and the 2nd AMF network element is target AMF network element.First AMF network element is used for, Determine that the first PDU session relevant network slice example is unavailable, and the relevant network slice of the first PDU session is available, it can be with Include: that the first AMF network element is used for, receive third information, and according to third information, determines that the 2nd AMF network element does not support the first PDU The relevant network of session is sliced example, and supports the relevant network slice of the first PDU session.

Optionally, which can also include: the 2nd AMF network element or NRF network element.2nd AMF network element or NRF network element are used In to the first AMF network element the 4th information of transmission；Wherein, it is real to be used to indicate the relevant network slice of the first PDU session for the 4th information Example and network slice；In register flow path, the first AMF network element is new AMF network element, and the 2nd AMF network element is old AMF network element；Alternatively, In switching flow, the first AMF network element is target AMF network element, and the 2nd AMF network element is source AMF network element.First AMF network element is used for, Determine that the first PDU session relevant network slice example is unavailable, and the relevant network slice of the first PDU session is available, it can be with Include: that the first AMF network element is used for, receive the 4th information, and according to the 4th information, determines that the first AMF network element does not support the first PDU The relevant network of session is sliced example, and supports the relevant network slice of the first PDU session.

Optionally, the first AMF network element is used for, and determines that the relevant network slice example of the first PDU session is unavailable, and first The relevant network slice of PDU session is available, may include: that the first AMF network element is used for, according to the location information of terminal, the first PDU The coverage of the relevant network slice example of session and the coverage of the relevant network slice of the first PDU session, determine The relevant network slice example of first PDU session is unavailable, and the relevant network slice of the first PDU session is available.

Optionally, which can also include: NSSF network element；First AMF network element is used for, and determines that the first PDU session is related Network slice example it is unavailable, and the first PDU session relevant network slice is available, may include: that the first AMF network element is used In to NSSF network element the 5th information of transmission；Wherein, the 5th information is used to indicate the relevant network slice example of the first PDU session It is unavailable, and indicate that NSSF network element sends the identification information of available network slice example to the first AMF network element；And it receives The identification information for the available network slice example that NSSF network element is sent；Wherein, available network slice example and the first PDU session phase The network slice example of pass belongs to consolidated network slice.NSSF network element is used for, and receives the 5th information, and send out to the first AMF network element Send the identification information of available network slice example.

Optionally, the information type of the first information is request or allows.Further alternative, terminal is used for, and is being received After the first information, PDU session rebuilding process is initiated, may include: that terminal is used for, if the information type of the first information is fair Perhaps, then it is receiving the first information, and is determining when needing to initiate PDU session rebuilding process, initiating PDU session rebuilding process.

Any device (such as SMF network element, AMF network element, terminal installation) provided by the embodiments of the present application and session rebuilding system In related content explanation and can be obtained technical effect and can refer to above method embodiment, details are not described herein.

In the description of the present application, unless otherwise indicated, "/" indicate or the meaning, for example, A/B can indicate A or B；This "and/or" in text be only it is a kind of describe affiliated partner incidence relation, indicate may exist three kinds of relationships, for example, A and/ Or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.Also, in the description of the present application In, unless otherwise indicated, " multiple " refer to two or more.In addition, for the ease of clearly describing the embodiment of the present application Technical solution uses the printed words such as " first ", " second " to function and acts on essentially identical phase in embodiments herein It is distinguished with item or similar item.It will be appreciated by those skilled in the art that the printed words such as " first ", " second " to quantity and are not held Row order is defined, and the printed words such as " first ", " second " also do not limit certain difference.

The network architecture and application scenarios of the embodiment of the present application description are to more clearly illustrate that the application is implemented The technical solution of example, does not constitute the restriction to technical solution provided by the embodiments of the present application, skilled person will appreciate that, with The differentiation of the network architecture and the appearance of new opplication scene, technical solution provided by the embodiments of the present application similar technology is asked It inscribes equally applicable.

In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real It is existing.When being realized using software program, can entirely or partly realize in the form of a computer program product.The computer Program product includes one or more computer instructions.On computers load and execute computer executed instructions when, all or It partly generates according to process or function described in the embodiment of the present application.The computer can be general purpose computer, dedicated meter Calculation machine, computer network or other programmable devices.The computer instruction can store in computer readable storage medium In, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the computer Instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center 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 either includes the numbers such as one or more server, data centers that medium can be used to integrate According to storage equipment.The usable medium can be magnetic medium (for example, floppy disk, hard disk, tape), optical medium (for example, DVD), Or semiconductor medium (such as solid state hard disk (solid state disk, SSD)) etc..

Although the application is described in conjunction with each embodiment herein, however, implementing the application claimed In the process, those skilled in the art are by checking the attached drawing, disclosure and the appended claims, it will be appreciated that and it is real Other variations of the existing open embodiment.In the claims, " comprising " (comprising) word is not excluded for other compositions Part or step, "a" or "an" are not excluded for multiple situations.Claim may be implemented in single processor or other units In several functions enumerating.Mutually different has been recited in mutually different dependent certain measures, it is not intended that these are arranged It applies to combine and generates good effect.

Although the application is described in conjunction with specific features and embodiment, it is clear that, do not departing from this Shen In the case where spirit and scope please, it can be carry out various modifications and is combined.Correspondingly, the specification and drawings are only institute The exemplary illustration for the application that attached claim is defined, and be considered as covered within the scope of the application any and all and repair Change, change, combining or equivalent.Obviously, those skilled in the art the application can be carried out various modification and variations without It is detached from spirit and scope.If in this way, these modifications and variations of the application belong to the claim of this application and its Within the scope of equivalent technologies, then the application is also intended to include these modifications and variations.

Claims (32)

1. a kind of session rebuilding method characterized by comprising

When the first Packet Data Unit PDU session of terminal relevant network slice example is unavailable, and the first PDU session When relevant network slice can be used, conversation management functional SMF network element sends the first information to the terminal, and the first information is used PDU session rebuilding process is initiated in the instruction terminal.

2. the method according to claim 1, wherein the method also includes:

The second information that the SMF network element receives the first access and mobile management function AMF network element is sent；Second information is used In instruction: the relevant network slice example of the first PDU session is unavailable, and the relevant network of the first PDU session is cut Piece is available.

3. according to the method described in claim 2, it is characterized in that, the SMF network element receives the first AMF network element is sent second Information, comprising:

The SMF network element receives second information that the first AMF network element is sent through the 2nd AMF network element；Wherein, it is registering In process, the 2nd AMF network element is old AMF network element, and the first AMF network element is new AMF network element；Alternatively, in switching flow In, the 2nd AMF network element is source AMF network element, and the first AMF network element is target AMF network element；The first AMF network element is not Support the relevant network slice example of the first PDU.

4. method according to any one of claims 1 to 3, which is characterized in that the SMF network element sends the to the terminal One information, comprising:

The SMF network element sends the first information to the terminal through the 3rd AMF network element and the 4th AMF network element；Wherein, it is infusing In volume process, the 3rd AMF network element is old AMF network element, and the 4th AMF network element is new AMF network element；Alternatively, being flowed in switching Cheng Zhong, the 3rd AMF network element are source AMF network elements, and the 4th AMF network element is target AMF network element；The 4th AMF network element The relevant network slice example of the first PDU session is not supported.

5. according to the method described in claim 4, it is characterized in that, the SMF network element is through the 3rd AMF network element and the 4th AMF net Member sends the first information to the terminal, comprising:

The SMF network element sends the first information to the 4th AMF network element through the 3rd AMF network element；The first information carries The terminal is sent to by the 4th AMF network element in PDU session status message；The PDU session status message includes described The status information of at least one PDU session of terminal；One of the status information instruction presence, release and reconstruction state； At least one described PDU session includes the first PDU session, and the status information of the first PDU session indicates to rebuild.

6. method according to any one of claims 1 to 5, which is characterized in that the SMF network element sends the to the terminal One information, comprising:

The SMF network element sends the first information according to policy information, Xiang Suoshu terminal；The policy information is used to indicate: The relevant network slice example of the first PDU session is unavailable, and the relevant network slice of the first PDU session is available When, initiate the strategy of PDU session rebuilding process.

7. according to the method described in claim 6, it is characterized in that, the policy information is stored in advance in the SMF network element sheet Ground, or the SMF network element is sent to by policy control functions PCF network element.

8. a kind of session rebuilding method characterized by comprising

When the first Packet Data Unit PDU session of terminal relevant network slice example is unavailable, and the first PDU session When relevant network slice can be used, the first access and mobile management function to ps domain AMF network element are sent to conversation management functional SMF network element Second information；Second information sends the first information, institute to the terminal according to second information for the SMF network element It states the first information and is used to indicate the terminal initiation PDU session rebuilding process.

9. according to the method described in claim 8, it is characterized in that, the method also includes:

The first AMF network element receives the third information that the 2nd AMF network element or network storage function NRF network element are sent；Wherein, institute It states third information and is used to indicate the network slice example and network slice that the 2nd AMF network element is supported；In register flow path, institute Stating the first AMF network element is old AMF network element, and the 2nd AMF network element is new AMF network element；Alternatively, in switching flow, described One AMF network element is source AMF network element, and the 2nd AMF network element is target AMF network element；

The first AMF network element is according to third information, however, it is determined that the 2nd AMF network element does not support the first PDU session phase The network of pass is sliced example, and supports the relevant network slice of the first PDU session, it is determined that the first PDU session phase The network slice example of pass is unavailable, and the relevant network slice of the first PDU session is available.

10. according to the method described in claim 8, it is characterized in that, the method also includes:

The first AMF network element receives the 4th information that the 2nd AMF network element or NRF network element are sent；Wherein, the 4th information is used In the relevant network slice example of instruction the first PDU session and network slice；In register flow path, the first AMF net Member is new AMF network element, and the 2nd AMF network element is old AMF network element；Alternatively, in switching flow, the first AMF network element is Target AMF network element, the 2nd AMF network element are source AMF network elements；

The first AMF network element is according to the 4th information, however, it is determined that the first AMF network element does not support the first PDU session phase The network of pass is sliced example, and supports the relevant network slice of the first PDU session, it is determined that the first PDU session phase The network slice example of pass is unavailable, and the relevant network slice of the first PDU session is available.

11. according to the method described in claim 8, it is characterized in that, the method also includes:

The first AMF network element is sliced example according to the location information of the terminal, the relevant network of the first PDU session Coverage and the coverage of the relevant network slice of the first PDU session, determine that the first PDU session is related Network slice example it is unavailable, and the first PDU session relevant network slice is available.

12. according to the method described in claim 8, it is characterized in that, the method also includes:

The first AMF network element sends the 5th information to network slice selection function NSSF network element；Wherein, the 5th information is used It is unavailable in the relevant network slice example of instruction the first PDU session, and indicate the NSSF network element to the first AMF Network element sends the identification information of the available network slice example；

The first AMF network element receives the identification information for the available network slice example that the NSSF network element is sent；Wherein, The available network is sliced example network slice example relevant to the first PDU session and belongs to consolidated network slice.

13. a kind of session rebuilding method characterized by comprising

Terminal receives the first information from conversation management functional SMF network element；Wherein, the first Packet Data Unit of the terminal The relevant network slice example of PDU session is unavailable, and the relevant network slice of the first PDU session is available；Described first Information is used to indicate the terminal and initiates PDU session rebuilding process；

The terminal initiates PDU session rebuilding process after receiving the first information.

14. according to the method for claim 13, which is characterized in that the terminal after receiving the first information, Initiate PDU session rebuilding process, comprising:

If the information type of the first information is to allow, when the terminal determination needs to initiate PDU session rebuilding process, hair Play PDU session rebuilding process.

15. a kind of session rebuilding method characterized by comprising

The Packet Data Unit PDU session status message that terminal receives access and mobile management function AMF network element is sent；It is described PDU session status message includes the status information of at least one Packet Data Unit PDU session of the terminal；The state letter One of breath instruction presence, release and reconstruction state；At least one described PDU session include the first PDU session, described first The status information of PDU session indicates to rebuild；The AMF network element after receiving the first information that the SMF network element is sent, to The terminal sends the PDU session status message；The first information is used to indicate the terminal and initiates PDU session rebuilding stream Journey.

16. a kind of conversation management functional SMF network element characterized by comprising

Transmission unit determines that the relevant network slice example of the first Packet Data Unit PDU session of terminal is unavailable for working as, And the relevant network slice of the first PDU session it is available when, Xiang Suoshu terminal sends the first information；The first information is used for Indicate that the terminal initiates PDU session rebuilding process.

17. SMF network element according to claim 16, which is characterized in that the SMF network element further include:

Receiving unit, for receiving the second information of the first access and the transmission of mobile management function AMF network element；Second information Be used to indicate: the relevant network slice example of the first PDU session is unavailable, and the relevant network of the first PDU session Slice is available.

18. SMF network element according to claim 17, which is characterized in that

The receiving unit is specifically used for, and receives second information that the first AMF network element is sent through the 2nd AMF network element； Wherein, in register flow path, the 2nd AMF network element is old AMF network element, and the first AMF network element is new AMF network element；Alternatively, In switching flow, the 2nd AMF network element is source AMF network element, and the first AMF network element is target AMF network element；Described first AMF network element does not support the relevant network slice example of the first PDU.

19. 6 to 18 described in any item SMF network elements according to claim 1, which is characterized in that

The transmission unit is specifically used for, and sends first letter to the terminal through the 3rd AMF network element and the 4th AMF network element Breath；Wherein, in register flow path, the 3rd AMF network element is old AMF network element, and the 4th AMF network element is new AMF network element；Or Person, in switching flow, the 3rd AMF network element is source AMF network element, and the 4th AMF network element is target AMF network element；It is described 4th AMF network element does not support the relevant network slice example of the first PDU session.

20. SMF network element according to claim 19, which is characterized in that

The transmission unit is specifically used for, and sends the first information to the 4th AMF network element through the 3rd AMF network element；Described first Information carrying is sent to the terminal by the 4th AMF network element in PDU session status message；The PDU session status disappears Breath includes the status information of at least one PDU session of the terminal；The status information instruction exists, in release and reconstruction A kind of state；At least one described PDU session includes the first PDU session, the status information instruction of the first PDU session It rebuilds.

21. 6 to 20 described in any item SMF network elements according to claim 1, which is characterized in that

The transmission unit is specifically used for, and according to policy information, Xiang Suoshu terminal sends the first information；The policy information Be used to indicate: the relevant network slice example of the first PDU session is unavailable, and the relevant network of the first PDU session When slice is available, the strategy of PDU session rebuilding process is initiated.

22. the first access of one kind and mobile management function AMF network element characterized by comprising

Transmission unit, it is unavailable for the relevant network slice example of the first Packet Data Unit PDU session when terminal, and institute When stating the relevant network slice of the first PDU session can be used, the second information is sent to conversation management functional SMF network element；Described second Information sends the first information to the terminal according to second information for the SMF network element, and the first information is for referring to Show that the terminal initiates PDU session rebuilding process.

23. the first AMF network element according to claim 22, which is characterized in that the first AMF network element further include:

Receiving unit, the third information sent for receiving the 2nd AMF network element or network storage function NRF network element；Wherein, described Third information is used to indicate the network slice example and network slice that the 2nd AMF network element is supported；It is described in register flow path First AMF network element is old AMF network element, and the 2nd AMF network element is new AMF network element；Alternatively, in switching flow, described first AMF network element is source AMF network element, and the 2nd AMF network element is target AMF network element；

Processing unit, for according to the third information, however, it is determined that the 2nd AMF network element does not support the first PDU session Relevant network is sliced example, and supports the relevant network slice of the first PDU session, it is determined that the first PDU session Relevant network slice example is unavailable, and the relevant network slice of the first PDU session is available.

24. the first AMF network element according to claim 22, which is characterized in that the first AMF network element further include:

Receiving unit, the 4th information sent for receiving the 2nd AMF network element or NRF network element；Wherein, the 4th information is used for Indicate the relevant network slice example of the first PDU session and network slice；In register flow path, the first AMF network element It is new AMF network element, the 2nd AMF network element is old AMF network element；Alternatively, the first AMF network element is mesh in switching flow AMF network element is marked, the 2nd AMF network element is source AMF network element；

Processing unit, for according to the 4th information, however, it is determined that the first AMF network element does not support the first PDU session Relevant network is sliced example, and supports the relevant network slice of the first PDU session, it is determined that the first PDU session Relevant network slice example is unavailable, and the relevant network slice of the first PDU session is available.

25. the first AMF network element according to claim 22, which is characterized in that the first AMF network element further include:

Processing unit, for the clothes according to the location information of the terminal, the relevant network slice example of the first PDU session Business region and the coverage of the relevant network slice of the first PDU session, determine that the first PDU session is relevant It is unavailable that network is sliced example, and the relevant network slice of the first PDU session is available.

26. the first AMF network element according to claim 22, which is characterized in that

The transmission unit is also used to, and sends the 5th information to network slice selection function NSSF network element；Wherein, the 5th letter It is unavailable that breath is used to indicate the first PDU session relevant network slice example, and the instruction NSSF network element is to described the One AMF network element sends the identification information of the available network slice example；The first AMF network element further include:

Receiving unit, for receiving the identification information for the available network slice example that the NSSF network element is sent；It is described can Belong to consolidated network slice with network slice example network slice example relevant to the first PDU session.

27. a kind of terminal installation characterized by comprising

Receiving unit, for receiving the first information from conversation management functional SMF network element；Wherein, first point of the terminal The relevant network slice example of group data cell PDU session is unavailable, and the relevant network slice of the first PDU session can With；The first information is used to indicate the terminal and initiates PDU session rebuilding process；

Processing unit, for initiating PDU session rebuilding process after the receiving unit receives the first information.

28. terminal installation according to claim 27, which is characterized in that

The processing unit is specifically used for, if the information type of the first information is to allow, determines in the terminal installation When needing to initiate PDU session rebuilding process, PDU session rebuilding process is initiated.

29. a kind of terminal installation characterized by comprising

Receiving unit, the Packet Data Unit PDU session status for receiving access and the transmission of mobile management function AMF network element disappear Breath；Wherein, the PDU session status message includes: the status information of at least one PDU session of the terminal；The state One of information instruction presence, release and reconstruction state；At least one described PDU session includes the first PDU session, and described the The status information of one PDU session indicates to rebuild；The AMF network element is receiving the first of the transmission of conversation management functional SMF network element After information, Xiang Suoshu terminal sends the PDU session status message；The first information is used to indicate the terminal and initiates PDU session rebuilding process；The SMF network element is determining that the relevant network slice example of the first PDU session is unavailable, and institute When stating the relevant network slice of the first PDU session can be used, Xiang Suoshu terminal sends the first information；

Processing unit, for initiating PDU session rebuilding process after the receiving unit receives the first information.

30. a kind of session rebuilding system characterized by comprising such as the described in any item session managements of claim 16 to 21 Function SMF network element, and such as the described in any item terminal installations of claim 27 to 29.

31. session rebuilding system according to claim 30, which is characterized in that further include as claim 22 to 26 is any The first access and mobile management function AMF network element described in.

32. a kind of computer readable storage medium, which is characterized in that including computer instruction, when the computer instruction is being counted When being run on calculation machine, so that as the described in any item methods of claim 1 to 15 are performed.